Cooperative Institute for Research in Environmental Sciences

Veronica Vaida

Veronica Vaida

Research Interests

Building Chemical Complexity with Sunlight: Spectroscopic Studies of Atmospheric Molecules, Radicals, and Their Complexes. Professor Vaida's research interest focuses on issues of photoreactivity in planetary atmospheres, including the contemporary and ancient Earth. The approach employed to obtain the structure and dynamics of molecules, radicals, and their complexes involves a combination of spectroscopic, photofragment and theoretical techniques. Aqueous environments, especially water-air interfaces as available at the sea surface and on atmospheric aerosols are special reaction environments investigated by surface reflection spectroscopy.

Current Research

Atmospheric Photochemistry of Organic Molecules. Our program explores water- and sunlight-mediated processes in planetary atmospheres including the contemporary and prebiotic Earth. My approach aims to provide new input for models of atmospheric chemistry and climate, using fundamental chemical physics to address complex multiphase chemistry. Current research has used oxoacids in aqueous environments to exemplify the environmental chemistry that generates complex self-assembled organic aggregates. The Earth’s ocean-atmosphere, a sunlight-driven photochemical reactor, is a large and complex system, but has been altered over its existence through both natural and anthropogenic events. In this global reactor, chemistry occurs in all phases, although gas phase chemistry has received the most attention. It has long been established, however, that heterogeneous and multiphase reactions can be extremely important for a fundamental understanding of environmental chemical reactions, which affect chemical processing, air quality, and ultimately visibility, human health, and the planet’s temperature. Starlight provides energy capable of driving planetary processes, which increase a system’s chemical complexity. Starlight-initiated reactions generate high-energy molecules that are precursors to metabolism as it has evolved in life on Earth. Our experiments are designed to investigate the photochemical synthesis and reactivity of such model organic systems under conditions representative of exoplanet Earth analogues, as well as the effect of water on reactivity. Based on this photochemistry, potential spectroscopic probes will be designed for the identification of high-energy species and consequently of potentially habitable environments.

Collaboration within CIRES allowed analysis of the importance of the aqueous phase photolysis of pyruvic acid in the atmosphere. Our laboratory measurements of the rate of the photochemical reaction in solution were used as input for an atmospheric model that compared the loss of pyruvic acid through aqueous photolysis to the loss from the gas-phase photochemistry and oxidative processes. Results indicated that in an acidic environment, the aqueous photolysis is equally as important as the gas-phase photolysis, emphasizing the importance of developing a mechanistic understanding of aqueous-phase photochemical processes.

We have scaled the fundamental experimental work with pyruvic acid to realistic atmospheric conditions by using environmental chamber studies. Specifically we are using the CESAM (French acronym for Experimental Multiphasic Atmospheric Simulation Chamber) at the Université Paris–Est Créteil Val de Marne (UPEC) in collaboration with UPEC Professor Jean-François Doussin. By combining these laboratory and chamber studies, we connect our understanding of the photolysis of pyruvic acid to mechanisms for aerosol nucleation and growth.

 



Schematic of the life cycle of aqueous atmospheric aerosols

Schematic of the life cycle of aqueous atmospheric aerosols (orange areas represent surface-active organics, and light blue represents the aqueous core of the particle), highlighting the ocean-atmosphere interactions. From Rapf and Vaida (2016).

Honors and Awards

  • Fellow of the Alfred P. Sloan Foundation, 1981-83
  • Camille and Henrey Dreyfus Teacher-Scholar Award
  • Dr. Vaida is a professor at the University of Colorado at Boulder.

View Publications

  • Kroll, JA; Frandsen, BN; Kjaergaard, HG; Vaida, V (2018), Atmospheric Hydroxyl Radical Source: Reaction of Triplet SO2 and Water. J. Phys. Chem. A Version: 1 18th Meeting on Time-Resolved Vibrational Spectroscopy (TRVS) 122 (18) 4465-4469, Cambridge, ENGLAND, 2017, issn: 1089-5639, ids: GF8FJ, doi: 10.1021/acs.jpca.8b03524, PubMed ID: 29665331
  • Vaida, V; Harris, AER; Rapf, RJ; Perkins, RJ; Carpenter, BK (2017), Comment on "Reactivity of Ketyl and Acetyl Radicals from Direct Solar Actinic Photolysis of Aqueous Pyruvic Acid". J. Phys. Chem. A Version: 1 121 (45) 8738-8740, issn: 1089-5639, ids: FN7MY, doi: 10.1021/acs.jpca.7b06018, PubMed ID: 29083903
  • Rapf, RJ; Perkins, RJ; Carpenter, BK; Vaida, V (2017), Mechanistic Description of Photochemical Oligomer Formation from Aqueous Pyruvic Acid. J. Phys. Chem. A Version: 1 121 (22) 4272-4282, issn: 1089-5639, ids: EX4GK, doi: 10.1021/acs.jpca.7b03310, PubMed ID: 28510434
  • Rapf, RJ; Dooley, MR; Kappes, K; Perkins, RJ; Vaida, V (2017), pH Dependence of the Aqueous Photochemistry of alpha-Keto Acids. J. Phys. Chem. A Version: 1 121 (44) 8368-8379, issn: 1089-5639, ids: FM6DZ, doi: 10.1021/acs.jpca.7b08192, PubMed ID: 29032688
  • Rapf, RJ; Perkins, RJ; Yang, HS; Miyake, G; Carpenter, BK; Vaida, V (2017), Photochemical Synthesis of Oligomeric Amphiphiles from Alkyl Oxoacids in Aqueous Environments. J. Am. Chem. Soc. Version: 1 139 (20) 6946-6959, issn: 0002-7863, ids: EW4VH, doi: 10.1021/jacs.7b01707, PubMed ID: 28481114
  • Perkins, R; Vaida, V (2017), Phenylalanine Increases Membrane Permeability. J. Am. Chem. Soc. Version: 1 139 (41) 14388-14391, issn: 0002-7863, ids: FK4YF, doi: 10.1021/jacs.7b09219, PubMed ID: 28965406
  • Harris, AER; Cazaunau, M; Gratien, A; Pangui, E; Doussin, JF; Vaida, V (2017), Atmospheric Simulation Chamber Studies of the Gas-Phase Photolysis of Pyruvic Acid. J. Phys. Chem. A Version: 1 121 (44) 8348-8358, issn: 1089-5639, ids: FM6DZ, doi: 10.1021/acs.jpca.7b05139, PubMed ID: 29035055
  • Reed Harris, AE; Pajunoja, A; Cazaunau, M; Gratien, A; Pangui, E; Monod, A; Griffith, EC; Virtanen, A; Doussin, JF; Vaida, V (2017), Multiphase Photochemistry of Pyruvic Acid under Atmospheric Conditions. J. Phys. Chem. A Version: 1 121 (18) 3327-3339, issn: 1089-5639, ids: EV0BG, doi: 10.1021/acs.jpca.7b01107, PubMed ID: 28388049
  • Kroll, JA; Hansen, AS; Moller, KH; Axson, JL; Kjaergaard, HG; Vaida, V (2017), Ultraviolet Spectroscopy of the Gas Phase Hydration of Methylglyoxal. ACS Earth Space Chem. Version: 1 1 (6) 345-352, issn: 2472-3452, ids: FE4MC, doi: 10.1021/acsearthspacechem.7b00054
  • Reed Harris, AE; Doussin, JF; Carpenter, BK; Vaida, V (2016), Gas-Phase Photolysis of Pyruvic Acid: The Effect of Pressure on Reaction Rates and Products. J. Phys. Chem. A Version: 1 120 (51) 10123-10133, issn: 1089-5639, ids: EG6MI, doi: 10.1021/acs.jpca.6b09058, PubMed ID: 27992197
  • Perkins, RJ; Shoemaker, RK; Carpenter, BK; Vaida, V (2016), Chemical Equilibria and Kinetics in Aqueous Solutions of Zymonic Acid. J. Phys. Chem. A Version: 1 120 (51) 10096-10107, issn: 1089-5639, ids: EG6MI, doi: 10.1021/acs.jpca.6b10526, PubMed ID: 27991786
  • Perkins, RJ; Kukharchuk, A; Delcroix, P; Shoemaker, RK; Roeselova, M; Cwiklik, L; Vaida, V (2016), The Partitioning of Small Aromatic Molecules to Air-Water and Phospholipid Interfaces Mediated by Non-Hydrophobic Interactions. J. Phys. Chem. B Version: 1 120 (30) 7408-7422, issn: 1520-6106, ids: DT1IV, doi: 10.1021/acs.jpcb.6b05084, PubMed ID: 27399964
  • Rapf, RJ; Vaida, V (2016), Sunlight as an energetic driver in the synthesis of molecules necessary for life. Phys. Chem. Chem. Phys. Version: 1 18 (30) 20067-20084, issn: 1463-9076, ids: DT4CV, doi: 10.1039/c6cp00980h, PubMed ID: 27193698
  • Donaldson, DJ; Kroll, JA; Vaida, V (2016), Gas-phase hydrolysis of triplet SO2: A possible direct route to atmospheric acid formation. Sci Rep Version: 1 6 , Art. No. 30000, issn: 2045-2322, ids: DR2JP, doi: 10.1038/srep30000, PubMed ID: 27417675
  • Schroder, SD; Wallberg, JH; Kroll, JA; Maroun, Z; Vaida, V; Kjaergaard, HG (2015), Intramolecular Hydrogen Bonding in Methyl Lactate. J. Phys. Chem. A Version: 1 70th International Symposium on Molecular Spectroscopy 119 (37) 9692-9702, Champaign, IL, JUN 22-26, 2015, issn: 1089-5639, ids: CS1ZL, doi: 10.1021/acs.jpca.5b04812, PubMed ID: 26296230
  • Griffith, EC; Perkins, RJ; Telesford, DM; Adams, EM; Cwiklik, L; Allen, HC; Roeseova, M; Vaida, V (2015), Interaction of L-Phenylalanine with a Phospholipid Monolayer at the Water-Air Interface. J. Phys. Chem. B Version: 1 119 (29) 9038-9048, issn: 1520-6106, ids: CN7OM, doi: 10.1021/jp508473w, PubMed ID: 25549016
  • Reed Harris, AE; Ervens, B; Shoemaker, RK; Kroll, JA; Rapf, RJ; Griffith, EC; Monod, A; Vaida, V (2014), Photochemical Kinetics of Pyruvic Acid in Aqueous Solution. J. Phys. Chem. A Version: 1 118 (37) 8505-8516, issn: 1089-5639, ids: AP5KV, doi: 10.1021/jp502186q, PubMed ID: 24725260
  • Griffith, EC; Rapf, RJ; Shoemaker, RK; Carpenter, BK; Vaida, V (2014), Photoinitiated Synthesis of Self-Assembled Vesicles. J. Am. Chem. Soc. Version: 1 136 (10) 3784-3787, issn: 0002-7863, ids: AD0KJ, doi: 10.1021/ja5006256, PubMed ID: 24559493
  • Renard, P; Reed Harris, AE; Rapf, RJ; Ravier, S; Demelas, C; Coulomb, B; Quivet, E; Vaida, V; Monod, A (2014), Aqueous Phase Oligomerization of Methyl Vinyl Ketone by Atmospheric Radical Reactions. J. Phys. Chem. C Version: 1 118 (50) 29421-29430, issn: 1932-7447, ids: AX2FP, doi: 10.1021/jp5065598
  • George, C; DAnna, B; Herrmann, H; Weller, C; Vaida, V; Donaldson, DJ; Bartels-Rausch, T; Ammann, M (2014), Emerging Areas in Atmospheric Photochemistry. Top. Curr. Chem. Version: 1 339 1-53, Ed. McNeill, VF; Ariya, PA, issn: 0340-1022, ids: BA0BQ, isbn: 978-3-642-41215-8; 978-3-642-41214-1, doi: 10.1007/128_2012_393, PubMed ID: 23247500
  • Vaida, V; Donaldson, DJ (2014), Red-light initiated atmospheric reactions of vibrationally excited molecules. Phys. Chem. Chem. Phys. Version: 1 16 (3) 827-836, issn: 1463-9076, ids: 274ZE, doi: 10.1039/c3cp53543f, PubMed ID: 24281304
  • Griffith, EC; Guizado, TRC; Pimentel, AS; Tyndall, GS; Vaida, V (2013), Oxidized Aromatic-Aliphatic Mixed Films at the Air-Aqueous Solution Interface. J. Phys. Chem. C Version: 1 117 (43) 22341-22350, issn: 1932-7447, ids: 247HJ, doi: 10.1021/jp402737n
  • Griffith, EC; Shoemaker, RK; Vaida, V (2013), Sunlight-initiated Chemistry of Aqueous Pyruvic Acid: Building Complexity in the Origin of Life. Orig. Life Evol. Biosph. Version: 1 43 (5-Apr) 341-352, issn: 0169-6149, ids: AD4FS, doi: 10.1007/s11084-013-9349-y, PubMed ID: 24362712
  • Griffith, EC; Carpenter, BK; Shoemaker, RK; Vaida, V (2013), Reply to Eugene et al.: Photochemistry of aqueous pyruvic acid. Proc. Natl. Acad. Sci. U. S. A. Version: 1 110 (46) E4276-E4276, issn: 0027-8424, ids: 250DQ, doi: 10.1073/pnas.1316367110, PubMed ID: 24367807
  • Griffith, EC; Carpenter, BK; Shoemaker, RK; Vaida, V (2013), Photochemistry of aqueous pyruvic acid. Proc. Natl. Acad. Sci. U. S. A. Version: 1 110 (29) 11714-11719, issn: 0027-8424, ids: 187AB, doi: 10.1073/pnas.1303206110, PubMed ID: 23821751
  • Kahan, TF; Ormond, TK; Ellison, GB; Vaida, V (2013), Acetic acid formation via the hydration of gas-phase ketene under ambient conditions. Chem. Phys. Lett. Version: 1 565 1-4, issn: 0009-2614, ids: 115EF, doi: 10.1016/j.cplett.2013.02.030
  • Griffith, EC; Vaida, V (2013), Ionization state of L-Phenylalanine at the Air-Water Interface. J. Am. Chem. Soc. Version: 1 135 (2) 710-716, issn: 0002-7863, ids: 075XP, doi: 10.1021/ja308089n, PubMed ID: 23240998
  • Thomsen, DL; Axson, JL; Schroder, SD; Lane, JR; Vaida, V; Kjaergaard, HG (2013), Intramolecular Interactions in 2-Aminoethanol and 3-Aminopropanol. J. Phys. Chem. A Version: 1 117 (40) 10260-10273, issn: 1089-5639, ids: 244DI, doi: 10.1021/jp405512y, PubMed ID: 24001040
  • Griffith, EC; Adams, EM; Allen, HC; Vaida, V (2012), Hydrophobic Collapse of a Stearic Acid Film by Adsorbed L-Phenylalanine at the Air-Water Interface. J. Phys. Chem. B Version: 1 116 (27) 7849-7857, issn: 1520-6106, ids: 972GB, doi: 10.1021/jp303913e, PubMed ID: 22691061
  • Kahan, TF; Washenfelder, RA; Vaida, V; Brown, SS (2012), Cavity-Enhanced Measurements of Hydrogen Peroxide Absorption Cross Sections from 353 to 410 nm. J. Phys. Chem. A Version: 1 116 (24) 5941-5947, issn: 1089-5639, ids: 961DM, doi: 10.1021/jp2104616, PubMed ID: 22225472
  • Kramer, ZC; Takahashi, K; Vaida, V; Skodje, RT (2012), Will water act as a photocatalyst for cluster phase chemical reactions? Vibrational overtone-induced dehydration reaction of methanediol. J. Chem. Phys. Version: 1 136 (16) , Art. No. 164302, issn: 0021-9606, ids: 936PJ, doi: 10.1063/1.4704767, PubMed ID: 22559477
  • Larsen, MC; Vaida, V (2012), Near Infrared Photochemistry of Pyruvic Acid in Aqueous Solution. J. Phys. Chem. A Version: 1 116 (24) 5840-5846, issn: 1089-5639, ids: 961DM, doi: 10.1021/jp2087972, PubMed ID: 22233273
  • Griffith, EC; Tuck, AF; Vaida, V (2012), Ocean-Atmosphere Interactions in the Emergence of Complexity in Simple Chemical Systems. Accounts Chem. Res. Version: 1 45 (12) 2106-2113, issn: 0001-4842, ids: 061CR, doi: 10.1021/ar300027q, PubMed ID: 22509900
  • Griffith, EC; Vaida, V (2012), In situ observation of peptide bond formation at the water-air interface. Proc. Natl. Acad. Sci. U. S. A. Version: 1 109 (39) 15697-15701, issn: 0027-8424, ids: 017QD, doi: 10.1073/pnas.1210029109, PubMed ID: 22927374
  • Vaida, V (2011), Perspective: Water cluster mediated atmospheric chemistry. J. Chem. Phys. Version: 1 135 (2) , Art. No. 20901, issn: 0021-9606, ids: 792UN, doi: 10.1063/1.3608919, PubMed ID: 21766916
  • Maron, MK; Takahashi, K; Shoemaker, RK; Vaida, V (2011), Hydration of pyruvic acid to its geminal-diol, 2,2-dihydroxypropanoic acid, in a water-restricted environment. Chem. Phys. Lett. Version: 1 513 (6-Apr) 184-190, issn: 0009-2614, ids: 814XW, doi: 10.1016/j.cplett.2011.07.090
  • Axson, JL; Washenfelder, RA; Kahan, TF; Young, CJ; Vaida, V; Brown, SS (2011), Absolute ozone absorption cross section in the Huggins Chappuis minimum (350-470 nm) at 296 K. Atmos. Chem. Phys. Version: 1 11 (22) 11581-11590, issn: 1680-7316, ids: 863AC, doi: 10.5194/acp-11-11581-2011
  • Takahashi, K; Plath, KL; Axson, JL; Nelson, GC; Skodje, RT; Vaida, V (2010), Dynamics and spectroscopy of vibrational overtone excited glyoxylic acid and 2,2-dihydroxyacetic acid in the gas-phase. J. Chem. Phys. Version: 1 132 (9) , Art. No. 94305, issn: 0021-9606, ids: 564VG, doi: 10.1063/1.3327839, PubMed ID: 20210396
  • Donaldson, DJ; George, C; Vaida, V (2010), Red sky at night: Long-wavelength photochemistry in the atmosphere. Environ. Sci. Technol. Version: 1 44 (14) 5321-5326, issn: 0013-936X, ids: 623NF, doi: 10.1021/es903680v, PubMed ID: 20540491
  • Axson, JL; Takahashi, K; De Haan, DO; Vaida, V (2010), Gas-phase water-mediated equilibrium between methylglyoxal and its geminal diol. Proc. Natl. Acad. Sci. U. S. A. Version: 1 107 (15) 6687-6692, issn: 0027-8424, ids: 583AC, doi: 10.1073/pnas.0912121107, PubMed ID: 20142510
  • Miller, BJ; Yekutiel, M; Sodergren, AH; Howard, DL; Dunn, ME; Vaida, V; Kjaergaard, HG (2010), Overtone Spectra of 2-Mercaptoethanol and 1,2-Ethanedithiol. J. Phys. Chem. A Version: 1 114 (48) 12692-12700, issn: 1089-5639, ids: 686YP, doi: 10.1021/jp9112798, PubMed ID: 21067132
  • Plath, KL; Takahashi, K; Skodje, RT; Vaida, V (2009), Fundamental and Overtone Vibrational Spectra of Gas-Phase Pyruvic Acid. J. Phys. Chem. A Version: 1 113 (26) 7294-7303, issn: 1089-5639, ids: 462VG, doi: 10.1021/jp810687t, PubMed ID: 19260671
  • Vaida, V (2009), Spectroscopy of Photoreactive Systems: Implications for Atmospheric Chemistry. J. Phys. Chem. A Version: 1 113 (1) 5-18, issn: 1089-5639, ids: 390BU, doi: 10.1021/jp806365r, PubMed ID: 19072328
  • Miller, BJ; Howard, DL; Lane, JR; Kjaergaard, HG; Dunn, ME; Vaida, V (2009), SH-Stretching Vibrational Spectra of Ethanethiol and tert-Butylthiol. J. Phys. Chem. A Version: 1 113 (26) 7576-7583, issn: 1089-5639, ids: 462VG, doi: 10.1021/jp9017162, PubMed ID: 19432460
  • Plath, KL; Axson, JL; Nelson, GC; Takahashi, K; Skodje, RT; Vaida, V (2009), Gas-phase vibrational spectra of glyoxylic acid and its gem diol monohydrate. Implications for atmospheric chemistry. React. Kinet. Catal. Lett. Version: 1 96 (2) 209-224, issn: 0133-1736, ids: 443WW, doi: 10.1007/s11144-009-5528-2
  • Maron, MK; Shultz, MJ; Vaida, V (2009), Characterization of the nitric acid-water complex in the infrared and near-infrared region at ambient temperatures in carbon tetrachloride. Chem. Phys. Lett. Version: 1 473 (6-Apr) 268-273, issn: 0009-2614, ids: 443KM, doi: 10.1016/j.cplett.2009.03.071
  • Dunn, ME; Shields, GC; Takahashi, K; Skodje, RT; Vaida, V (2008), Experimental and Theoretical Study of the OH Vibrational Spectra and Overtone Chemistry of Gas-Phase Vinylacetic Acid. J. Phys. Chem. A Version: 1 112 (41) 10226-10235, issn: 1089-5639, ids: 358UN, doi: 10.1021/jp805746t, PubMed ID: 18798603
  • Vaida, V; Feierabend, KJ; Rontu, N; Takahashi, K (2008), Sunlight-initiated photochemistry: Excited vibrational states of atmospheric chromophores. Int. J. Photoenergy Version: 1, Art. No. 138091, issn: 1110-662X, ids: 332GH, doi: 10.1155/2008/138091
  • Takahashi, K; Plath, KL; Skodje, RT; Vaida, V (2008), Dynamics of vibrational overtone excited pyruvic acid in the gas phase: Line broadening through hydrogen-atom chattering. J. Phys. Chem. A Version: 1 112 (32) 7321-7331, issn: 1089-5639, ids: 335KT, doi: 10.1021/jp803225c, PubMed ID: 18637664
  • Rontu, N; Vaida, V (2008), Vibrational spectroscopy of perfluorocarboxylic acids from the infrared to the visible regions. J. Phys. Chem. B Version: 1 112 (2) 276-282, issn: 1520-6106, ids: 250GE, doi: 10.1021/jp0749773, PubMed ID: 17927241
  • Tuck, AF; Donaldson, DJ; Hitchman, MH; Richard, EC; Tervahattu, H; Vaida, V; Wilson, JC (2008), On geoengineering with sulphate aerosols in the tropical upper troposphere and lower stratosphere. Clim. Change Version: 1 90 (3) 315-331, issn: 0165-0009, ids: 348BU, doi: 10.1007/s10584-008-9411-3
  • Vesselenyi, T, I Dzitac, S Dzitac and V Vaida (2008), Surface roughness image analysis using quasi-fractal characteristics and fuzzy clustering methods. Int. J. Comput. Commun. Control Version: 1 3 (3) 304-316, issn: 1841-9836, ids: 321AB
  • Lane, JR; Vaida, V; Kjaergaard, HG (2008), Calculated electronic transitions of the water ammonia complex. J. Chem. Phys. Version: 1 128 (3) , Art. No. 34302, issn: 0021-9606, ids: 252UC, doi: 10.1063/1.2814163, PubMed ID: 18205493
  • Rontu, N; Vaida, V (2007), Surface partitioning and stability of pure and mixed films of 8-2 fluorotelomer alcohol at the air-water interface. J. Phys. Chem. C Version: 1 111 (31) 11612-11618, issn: 1932-7447, ids: 196LF, doi: 10.1021/jp070484m
  • Miller, Y; Gerber, RB; Vaida, V (2007), Photodissociation yields for vibrationally excited states of sulfuric acid under atmospheric conditions. Geophys. Res. Lett. Version: 1 34 (16) , Art. No. L16820, issn: 0094-8276, ids: 204FD, doi: 10.1029/2007GL030529
  • Takahashi, K; Kramer, ZC; Vaida, V; Skodje, RT (2007), Vibrational overtone induced elimination reactions within hydrogen-bonded molecular clusters: the dynamics of water catalyzed reactions in CH2FOH center dot(H2O). Phys. Chem. Chem. Phys. Version: 1 9 (29) 3864-3871, issn: 1463-9076, ids: 191AN, doi: 10.1039/b705264b, PubMed ID: 17637978
  • Rontu, N; Vaida, V (2007), Miscibility of perfluorododecanoic acid with organic acids at the air-water interface. J. Phys. Chem. C Version: 1 111 (27) 9975-9980, issn: 1932-7447, ids: 186EN, doi: 10.1021/jp0718395
  • Lane, JR; Kjaergaard, HG; Plath, KL; Vaida, V (2007), Overtone spectroscopy of sulfonic acid derivatives. J. Phys. Chem. A Version: 1 111 (25) 5434-5440, issn: 1089-5639, ids: 180VV, doi: 10.1021/jp0688005, PubMed ID: 17542563
  • Gearheard, S; Matumeak, W; Angutikjuaq, I; Maslanik, J; Huntington, HP; Leavitt, J; Kagak, DM; Tigullaraq, G; Barry, RG (2006), Its not that simple: A collaborative comparison of sea ice environments, their uses, observed changes, and adaptations in barrow, Alaska, USA, and Clyde River, Nunavut, Canada. Ambio Version: 1 7th Royal Colloquium on Arctic Under Stress - A Thawing Tundra 35 (4) 203-211, SWEDEN, MAY 30-JUN 01, 2005, issn: 0044-7447, ids: 072YH, doi: 10.1579/0044-7447(2006)35[203:INTSAC]2.0.CO;2, PubMed ID: 16944646
  • Feierabend, KJ; Havey, DK; Brown, SS; Vaida, V (2006), Experimental absolute intensities of the 4v(9) and 5v(9) O-H stretching overtones of H2SO4. Chem. Phys. Lett. Version: 1 420 (6-Apr) 438-442, issn: 0009-2614, ids: 026CC, doi: 10.1016/j.cplett.01.013
  • Rontu, N; Vaida, V (2006), Vibrational spectroscopy of perfluoroproplonic acid in the region between 1000 and 11000 cm(-1). J. Mol. Spectrosc. Version: 1 237 (1) 19-26, issn: 0022-2852, ids: 045LO, doi: 10.1016/j.jms.2006.02.009
  • Klemperer, W; Vaida, V (2006), Molecular complexes in close and far away. Proc. Natl. Acad. Sci. U. S. A. Version: 1 103 (28) 10584-10588, issn: 0027-8424, ids: 063VG, doi: 10.1073/pnas.0508231103, PubMed ID: 16740667
  • Feierabend, KJ; Havey, DK; Varner, ME; Stanton, JF; Vaida, V (2006), A comparison of experimental and calculated spectra of HNO3 in the near-infrared using Fourier transform infrared spectroscopy and vibrational perturbation theory. J. Chem. Phys. Version: 1 124 (12) , Art. No. 124323, issn: 0021-9606, ids: 028CP, doi: 10.1063/1.2180248, PubMed ID: 16599690
  • Gilman, JB; Vaida, V (2006), Permeability of acetic acid through organic films at the air-aqueous interface. J. Phys. Chem. A Version: 1 110 (24) 7581-7587, issn: 1089-5639, ids: 053DH, doi: 10.1021/jp061220n, PubMed ID: 16774200
  • Gilman, JB; Tervahattu, H; Vaida, V (2006), Interfacial properties of mixed films of long-chain organics at the air-water interface. Atmos. Environ. Version: 1 40 (34) 6606-6614, issn: 1352-2310, ids: 102BC, doi: 10.1016/j.atmosenv.2006.05.052
  • Havey, DK; Feierabend, KJ; Takahashi, K; Skodje, RT; Vaida, V (2006), Experimental and theoretical investigation of vibrational overtones of glycolic acid and its hydrogen bonding interactions with water. J. Phys. Chem. A Version: 1 110 (20) 6439-6446, issn: 1089-5639, ids: 043TW, doi: 10.1021/jp060602q, PubMed ID: 16706399
  • Donaldson, DJ; Vaida, V (2006), The influence of organic films at the air-aqueous boundary on atmospheric processes. Chem. Rev. Version: 1 106 (4) 1445-1461, issn: 0009-2665, ids: 035HB, doi: 10.1021/cr040367c, PubMed ID: 16608186
  • Vaida, V (2005), Review article: Sunlight initiated atmospheric photochemical reactions. Int. J. Photoenergy Version: 1 7 (2) 61-70, issn: 1110-662X, ids: 941CR, doi: 10.1155/S1110662X05000103
  • Tervahattu, H; Juhanoja, J; Vaida, V; Tuck, AF; Niemi, JV; Kupiainen, K; Kulmala, M; Vehkamaki, H (2005), Fatty acids on continental sulfate aerosol particles. J. Geophys. Res.-Atmos. Version: 1 110 (D6) , Art. No. D06207, issn: 2169-897X, ids: 913LS, doi: 10.1029/2004JD005400
  • Mills, MJ; Toon, OB; Vaida, V; Hintze, PE; Kjaergaard, HG; Schofield, DP; Robinson, TW (2005), Photolysis of sulfuric acid vapor by visible light as a source of the polar stratospheric CN layer. J. Geophys. Res.-Atmos. Version: 1 110 (D8) , Art. No. D08201, issn: 2169-897X, ids: 922QG, doi: 10.1029/2004JD005519
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  • ENGELKING, PC; VAIDA, V (1987), SYMMETRY EFFECTS IN THE ELECTRONIC-SPECTRUM OF AMMONIA AT LOW-TEMPERATURE. Int. J. Quantum Chem. Version: 1 31 (1) 73-80, issn: 0020-7608, ids: F5674, doi: 10.1002/qua.560310109
  • PRINSLOW, DA; VAIDA, V (1987), WAVELENGTH-DEPENDENT PHOTOFRAGMENTATION OF GAS-PHASE MN2(CO)10. J. Am. Chem. Soc. Version: 1 109 (17) 5097-5100, issn: 0002-7863, ids: J6754, doi: 10.1021/ja00251a007
  • GOODMAN, JL; PETERS, KS; VAIDA, V (1986), THE DETERMINATION OF THE MN-MN BOND STRENGTH IN MN2(CO)10 USING PULSED TIME-RESOLVED PHOTOACOUSTIC CALORIMETRY. Organometallics Version: 1 5 (4) 815-816, issn: 0276-7333, ids: A9137, doi: 10.1021/om00135a035
  • YANG, GK; PETERS, KS; VAIDA, V (1986), DYNAMICS OF INTERMEDIATES IN THE ALPHA-ELIMINATION AND BETA-ELIMINATION PROCESSES IN CPW(CO)2ME AND CPW(CO)2ET. J. Am. Chem. Soc. Version: 1 108 (10) 2511-2513, issn: 0002-7863, ids: C3778, doi: 10.1021/ja00270a003
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  • YANG, GK; PETERS, KS; VAIDA, V (1986), STRENGTH OF THE METAL-LIGAND BOND IN LCR(CO)5 MEASURED BY PHOTOACOUSTIC CALORIMETRY. Chem. Phys. Lett. Version: 1 125 (6-May) 566-568, issn: 0009-2614, ids: C1699, doi: 10.1016/0009-2614(86)87100-7
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  • ROEBBER, JL and V VAIDA (1985), THE DIRECT ULTRAVIOLET-ABSORPTION SPECTRUM OF THE 1-SIGMA-G+ -] 1B2(1-SIGMA-U+) TRANSITION OF JET-COOLED (C3252)-C-13 AND (C34S2)-C-12. J. Chem. Phys. Version: 1 83 (6) 2748-2753, issn: 0021-9606, ids: AQW58, doi: 10.1063/1.449224
  • HEMLEY, RJ, U DINUR, V VAIDA and M KARPLUS (1985), THEORETICAL-STUDY OF THE GROUND AND EXCITED SINGLET-STATES OF STYRENE. J. Am. Chem. Soc. Version: 1 107 (4) 836-844, issn: Feb-63, ids: ACC47, doi: 10.1021/ja00290a018
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  • VAIDA, V; HESS, W; ROEBBER, JL (1984), THE DIRECT ULTRAVIOLET-ABSORPTION SPECTRUM OF THE AA2\[-XA1 TRANSITION OF JET-COOLED AMMONIA. J. Phys. Chem. Version: 1 88 (16) 3397-3400, issn: 0022-3654, ids: TD549, doi: 10.1021/j150660a006
  • LEOPOLD, DG, RD PENDLEY, JL ROEBBER, RJ HEMLEY and V VAIDA (1984), DIRECT ABSORPTION-SPECTROSCOPY OF JET-COOLED POLYENES .2. THE 1 1BU+[-1 1AG- TRANSITIONS OF BUTADIENES AND HEXATRIENES. J. Chem. Phys. Version: 1 81 (10) 4218-4229, issn: 0021-9606, ids: TV207, doi: 10.1063/1.447453
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  • LEOPOLD, DG and V VAIDA (1984), PHOTOCHEMISTRY OF GAS-PHASE MN2(CO)10 AND RE2(CO)10 - MASS-SPECTROMETRIC EVIDENCE FOR A DINUCLEAR PRIMARY PHOTOPRODUCT. J. Am. Chem. Soc. Version: 1 106 (13) 3720-3722, issn: Feb-63, ids: SW839, doi: 10.1021/ja00325a002
  • HEMLEY, RJ, JI DAWSON and V VAIDA (1983), FRANCK-CONDON ANALYSIS OF THE 1 1AG--]1 1BU+ TRANSITION OF 1,3-BUTADIENE FROM ABSORPTION AND RAMAN INTENSITIES. J. Chem. Phys. Version: 1 78 (6) 2915-2927, issn: 0021-9606, ids: QG962, doi: 10.1063/1.445251
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  • WELCH, JA, V VAIDA and GL GEOFFROY (1983), GAS-PHASE MULTIPHOTON DISSOCIATION OF IRON CARBONYLS. J. Phys. Chem. Version: 1 87 (19) 3635-3638, issn: 0022-3654, ids: RG485, doi: 10.1021/j100242a013
  • GERRITY, DP, LJ ROTHBERG and V VAIDA (1983), ULTRAVIOLET VISIBLE MULTIPHOTON DISSOCIATION OF CR(CO)6 - EXPERIMENTAL-EVIDENCE FOR STATISTICAL FRAGMENTATION. J. Phys. Chem. Version: 1 87 (12) 2222-2225, issn: 0022-3654, ids: QU706, doi: 10.1021/j100235a035
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  • HALPERN, AM, DP GERRITY, LJ ROTHBERG and V VAIDA (1982), EVIDENCE OF A STATE DEPENDENT DEPLETION PROCESS IN THE 2-PHOTON FLUORESCENCE EXCITATION-SPECTRA OF SATURATED AMINES. J. Chem. Phys. Version: 1 76 (1) 102-107, issn: 0021-9606, ids: MW465, doi: 10.1063/1.442763
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  • LICHTIN, DA, RB BERNSTEIN and V VAIDA (1982), MULTI-PHOTON IONIZATION TIME-OF-FLIGHT MASS-SPECTROMETRY OF TRANSITION-METAL COMPLEXES - MN2(CO)10 AND RE2(CO)10. J. Am. Chem. Soc. Version: 1 104 (7) 1830-1834, issn: Feb-63, ids: NK245, doi: 10.1021/ja00371a009
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  • ROTHBERG, LJ, DP GERRITY and V VAIDA (1981), EFFECTS OF NON-RESONANT IONIZATION ON MULTI-PHOTON IONIZATION LINE-SHAPES. J. Chem. Phys. Version: 1 75 (9) 4403-4412, issn: 0021-9606, ids: MK823, doi: 10.1063/1.442604
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  • VAIDA, V, NJ COOPER, RJ HEMLEY and DG LEOPOLD (1981), PRODUCTION OF GAS-PHASE BARE TRANSITION-METAL CLUSTERS BY LASER PHOTO-DISSOCIATION OF ORGANO-METALLIC CLUSTER COMPOUNDS. J. Am. Chem. Soc. Version: 1 103 (23) 7022-7023, issn: Feb-63, ids: MQ502, doi: 10.1021/ja00413a067
  • LEOPOLD, DG, RJ HEMLEY, V VAIDA and JL ROEBBER (1981), DIRECT ABSORPTION-SPECTRA OF HIGHER EXCITED-STATES OF JET-COOLED MONOSUBSTITUTED BENZENES - PHENYLACETYLENE, STYRENE, BENZALDEHYDE, AND ACETOPHENONE. J. Chem. Phys. Version: 1 75 (10) 4758-4769, issn: 0021-9606, ids: MN294, doi: 10.1063/1.441911
  • ROTHBERG, LJ, DP GERRITY and V VAIDA (1980), ELECTRONIC-SPECTRA OF BUTADIENE AND ITS METHYL-DERIVATIVES - A MULTI-PHOTON IONIZATION STUDY. J. Chem. Phys. Version: 1 73 (11) 5508-5513, issn: 0021-9606, ids: KX295, doi: 10.1063/1.440070
  • ROEBBER, JL, DP GERRITY, R HEMLEY and V VAIDA (1980), ELECTRONIC-SPECTRUM OF FURAN FROM 2200-A TO 1950-A. Chem. Phys. Lett. Version: 1 75 (1) 104-106, issn: Sep-14, ids: KN668, doi: 10.1016/0009-2614(80)80474-X
  • VAIDA, V and GM MCCLELLAND (1980), ELECTRONIC ABSORPTION-SPECTROSCOPY OF COOLED SUPERSONIC EXPANSIONS - DYNAMICS OF THE 1B1U STATE OF TRANS-BUTADIENE. Chem. Phys. Lett. Version: 1 71 (3) 436-439, issn: Sep-14, ids: JZ344, doi: 10.1016/0009-2614(80)80197-7
  • GERRITY, DP, LJ ROTHBERG and V VAIDA (1980), MULTI-PHOTON IONIZATION OF METAL ATOMS PRODUCED IN THE PHOTO-DISSOCIATION OF GROUP-VI HEXACARBONYLS. Chem. Phys. Lett. Version: 1 74 (1) 1-5, issn: Sep-14, ids: KG965, doi: 10.1016/0009-2614(80)85001-9
  • TURNER, RE, V VAIDA, CA MOLINI, JO BERG and DH PARKER (1978), MULTI-PHOTON IONIZATION SPECTRA OF PYRIDINE AND PYRAZINE. Chem. Phys. Version: 1 28 (2-Jan) 47-54, issn: 0301-0104, ids: ET016, doi: 10.1016/0301-0104(78)85036-8
  • VAIDA, V, RE TURNER, JL CASEY and SD COLSON (1978), MULTI-PHOTON TRANSITIONS IN TRANS-BUTADIENE OBSERVED BY MULTI-PHOTON IONIZATION AND THERMAL LENSING SPECTROSCOPY. Chem. Phys. Lett. Version: 1 54 (1) 25-29, issn: Sep-14, ids: EW380, doi: 10.1016/0009-2614(78)85655-3
  • VAIDA, V and SD COLSON (1978), LOCAL STRUCTURE AND TRIPLET ENERGY MIGRATION IN PARA-DICHLOROBENZENE-PARA-DIBROMOBENZENE SOLID-SOLUTIONS. Mol. Phys. Version: 1 35 (4) 965-974, issn: 0026-8976, ids: FB258, doi: 10.1080/00268977800100711
  • VAIDA, V, MB ROBIN and NA KUEBLER (1978), NOTE ON ELUSIVE (E26)-E-1 STATE IN 2-PHOTON SPECTRUM OF BENZENE. Chem. Phys. Lett. Version: 1 58 (4) 557-560, issn: Sep-14, ids: FX421, doi: 10.1016/0009-2614(78)80018-9
  • VAIDA, V and SD COLSON (1977), INTERMOLECULAR MIXING OF ELECTRONIC STATES IN CHEMICALLY MIXED MOLECULAR-CRYSTALS. J. Chem. Phys. Version: 1 67 (2) 710-714, issn: 0021-9606, ids: DP685, doi: 10.1063/1.434876
  • COLSON, SD, SM GEORGE, T KEYES and V VAIDA (1977), SINGLET AND TRIPLET EXCITON PERCOLATION IN BENZENE ISOTOPIC MIXED-CRYSTALS. J. Chem. Phys. Version: 1 67 (11) 4941-4947, issn: 0021-9606, ids: EF423, doi: 10.1063/1.434676
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  • COLSON, SD and V VAIDA (1976), RESOLVED EMISSION FROM COMPOUND STATES IN CHEMICALLY MIXED CRYSTALS. J. Chem. Phys. Version: 1 64 (10) 4224-4225, issn: 0021-9606, ids: BR064, doi: 10.1063/1.431993