Publications

1992

Observation of charge‐transfer excited states in the I⁻⋅CH₃I, I⁻⋅CH₃Br, and I⁻⋅CH₂Br₂ SN2 reaction intermediates using photofragmentation and photoelectron spectroscopies

D. M. Cyr, G. A. Bishea, M. G. Scarton, and M. A. Johnson

J. Chem. Phys., Vol. 97, (8), pp. 5911

DOI Link: 10.1063/1.463752

1991

Nascent vibrational distribution of the O⁻₂ product ion in the photodissociation of (O₂)⁻_{n= 2–4}

Chau-Chung Han and Mark A. Johnson

Chem. Phys. Lett., Vol. 189, (4-5), pp. 460-466

DOI Link: 10.1016/0009-2614(92)85232-Y

Collisional activation of captured intermediates in the gas-phase S_N2 reaction Cl^– + CH₃Br → Br^- + CH₃Cl

Donna M. Cyr, Lynmarie A. Posey, Gregory A. Bishea, Chau Chung Han, and Mark A. Johnson

J. Am. Chem. Soc., Vol. 113, pp. 9697-9699

DOI Link: 10.1021/ja00025a059

Controlling the internal energy content of size‐selected cluster ions: An experimental comparison of the metastable decay rate and photofragmentation methods of quantifying the internal excitation of (H₂O)⁻_n

Paul J. Campagnola, Lynmarie A. Posey, and Mark A. Johnson

J. Chem. Phys., Vol. 95, (11), pp. 7998

DOI Link: 10.1063/1.461330

Bound-bound and bound-free contributions to the absorptions spectrum of (H₂O)₃₀^-

Paul J. Campagnola, David J. Lavrich, and Mark A. Johnson

JOURNAL DE PHYSIQUE IV, Vol. 1, (C5), pp. 93-98

DOI Link: 10.1051/jp4:1991511

Size-dependent collisional incorporation of D₂O into (H₂O)⁻_n around n = 15: implications on the origin of magic numbers in the hydrated electron cluster distribution

Paul J. Campagnola, Donna M. Cyr, and Mark A. Johnson

Chem. Phys. Lett., Vol. 181, (2-3), pp. 206-212

DOI Link: 10.1016/0009-2614(91)90356-E

Photodestruction spectra of the anionic water clusters, (H₂O)⁻_n, n=18 and 30: Absorption to the red of e⁻_aq

Paul J. Campagnola, David J. Lavrich, Michael J. DeLuca, and Mark A. Johnson

J. Chem. Phys., Vol. 94, (7), pp. 5240

DOI Link: 10.1063/1.460530

1990

Photoabsorption of negative cluster ions near the electron detachment threshold: A study of the (O₂)⁻_n system

Michael J. DeLuca, Chau‐Chung Han, and Mark A. Johnson

J. Chem. Phys., Vol. 93, (1), pp. 268

DOI Link: 10.1063/1.459600

Isotopic fractionation in low temperature ion–molecule exchange reactions: Enrichment of ²²Ne in Ne⁺_n clusters formed by association in an ionized free jet

Michael J. DeLuca, Donna M. Cyr, William A. Chupka, and Mark A. Johnson

J. Chem. Phys., Vol. 92, (12), pp. 7349

DOI Link: 10.1063/1.458220

The angular distribution of photoelectrons ejected from the hydrated electron cluster (H₂O)⁻₁₈

Paul J. Campagnola, Lynmarie A. Posey, and Mark A. Johnson

J. Chem. Phys., Vol. 92, (5), pp. 3243

DOI Link: 10.1063/1.457881

1989

On the origin of the competition between photofragmentation and photodetachment in hydrated electron clusters, (H₂O)⁻_n

Lynmarie A. Posey, Paul J. Campagnola, Mark A. Johnson, Gang Ho Lee, Joseph G. Eaton, and Kit H. Bowen

J. Chem. Phys., Vol. 91, (10), pp. 6536

DOI Link: 10.1063/1.457371

Observation of a UV absorption band in Ar₃⁺ near 300 nm

Michael J. Deluca and Mark A. Johnson

Chem. Phys. Lett., Vol. 1989, (6), pp. 445-448

DOI Link: 10.1016/0009-2614(89)87005-8

Preservation of rotational cooling following pulse compression TOF mass selection of N₂O⁺ ions created in a supersonic plasma

Michael J. Deluca, and Mark A. Johnson

Chem. Phys. Lett., Vol. 162, (5-6), pp. 255-260

DOI Link: 10.1016/0009-2614(89)87040-X

Reactions of hydrated electron clusters (H₂O)_n^-: scavenging the excess electron

Lynmarie A. Posey, Michael J. DeLuca, Paul J. Campagnola, and Mark A. Johnson

J. Phys. Chem., Vol. 93, (4), pp. 1178-1181

DOI Link: 10.1021/j100341a003

1988

Photofragmentation of C_n⁻, 4⩽n⩽20: Loss of neutral C₃

Michael J. Deluca and Mark A. Johnson

Chem. Phys. Lett., Vol. 152, (1), pp. 67-70

DOI Link: 10.1016/0009-2614(88)87329-9

Photochemistry of hydrated electron clusters (H₂O)⁻_n (15≤n≤40) at 1064 nm: Size dependent competition between photofragmentation and photodetachment

Lynmarie A. Posey and Mark A. Johnson

J. Chem. Phys., Vol. 89, (8), pp. 4807

DOI Link: 10.1063/1.455674

Photoelectron spectroscopy of (CO₂)⁻_n clusters with 2≤n≤13: Cluster size dependence of the core molecular ion

Michael J. DeLuca, Baohua Niu, and Mark A. Johnson

J. Chem. Phys., Vol. 88, (9), pp. 5857

DOI Link: 10.1063/1.454548

Pulsed photoelectron spectroscopy of negative cluster ions: Isolation of three distinguishable forms of N₂O₂⁻

Lynmarie A. Posey and Mark A. Johnson

J. Chem. Phys., Vol. 88, (9), pp. 5383

DOI Link: 10.1063/1.454576

1986

Demonstration of a pulsed photoelectron spectrometer on mass-selected negative ions - O^-, O₂^-, and O₄^-

Lynmarie A. Posey, Michael J. Deluca, Mark A. Johnson

Chem. Phys. Lett., Vol. 131, (3), pp. 170-174

DOI Link: 10.1016/0009-2614(86)80539-5

Cover Articles

Hydrogen Tag Shifts as Vibrational Reporters for Positional Isomers of Formylphenides: Surprising Mobility of the Carbanion Center Upon Collisional Decarboxylation of the Parent Benzoates

DOI Link: https://doi.org/10.1021/acs.jpclett.3c03514

Effects of Microhydration on the Mechanisms of Hydrolysis and Cl^- Substitution in Reactions of N₂O₅ and Seawater

DOI Link: https://doi.org/10.1002/cphc.202200819

Water Network Shape-Dependence of Local Interactions with the Microhydrated –NO₂⁻ and –CO₂⁻ Anionic Head Groups by Cold Ion Vibrational Spectroscopy

DOI Link: 10.1021/acs.jpca.2c00721

Preparation and Characterization of the Halogen Bonding Motif in the Isolated Cl⁻∙IOH Complex with Cryogenic Ion Vibrational Spectroscopy

DOI Link: 10.1021/acs.jpclett.2c00218

Vibrational signatures of HNO₃ acidity when complexed with microhydrated alkali metal ions, M⁺∙(HNO₃)(H₂O)_n=5 (M=Li, K, Na, Rb, Cs), at 20 K

DOI Link: 10.1021/acs.jpca.1c10352

Size-Dependent Onset of Nitric Acid Dissociation in Cs⁺(HNO₃)(H₂O)_n=0-11 Clusters at 20 K

DOI Link: 10.1021/acs.jpclett.1c00235

Isolating the Contributions of Specific Network Sites to the Diffuse Vibrational Spectrum of Interfacial Water With Isotopomer-Selective Spectroscopy of Cold Clusters

DOI Link: 10.1021/acs.jpca.0c07795

Ionic Liquid Clusters Generated from Electrospray Thrusters: Cold Ion Spectroscopic Signatures of Size-Dependent Acid−Base Interactions

DOI Link: 10.1021/acs.jpca.0c07595

Vibrational Spectroscopy of the Cryogenically Cooled O- and N-Protomers of 4-Aminobenzoic Acid: Tag Effects, Isotopic Labels, and Identification of the E,Z Isomer of the O-Protomer

DOI Link: 10.1016/j.ijms.2020.116427

Spectroscopic Signatures of Mode-Dependent Tunnel Splitting in the Iodide-Water Binary Complex

DOI Link: 10.1021/acs.jpca.0c00853

Integration of High-Resolution Mass Spectrometry with Cryogenic Ion Vibrational Spectroscopy

DOI Link: 10.1007/s13361-019-02238-y

Tag-Free and Isotopomer-Selective Vibrational Spectroscopy of the Cryogenically Cooled H₉O₄⁺ Cation with Two-Color, IR-IR Double-Resonance: Isolating the Spectral Signature of a Single OH Group in the Hydronium Ion Core

DOI Link: 10.1021/acs.jpca.8b08507

Isolation of the site-specific anharmonicities of individual water molecules in the Iˉ∙(H₂O)₂ complex using tag‐free, isotopomer selective IR‐IR double resonance

DOI Link: 10.1016/j.cplett.2017.09.042

Spectroscopic characterization of a strongly interacting C₍₂₎H group on the EMIM⁺ cation in the (EMIM⁺)₂Xˉ, (X = BF₄, Cl, Br, and I) ternary building blocks of ionic liquids

DOI Link: 10.1063/1.5009009

Capture of CO₂ by a Cationic Ni^I Complex in the Gas Phase and Characterization of the Bound Activated CO₂ Molecule through Cryogenic Ion Vibrational Predissociation Spectroscopy

DOI Link: 10.1002/anie.201507965

Snapshots of Proton Accommodation at a Microscopic Water Surface: Understanding the Vibrational Spectral Signatures of the Charge Defect in Cryogenically Cooled H⁺(H₂O)_n=2-28 Clusters

DOI Link: 10.1021/acs.jpca.5b04355

Modes of Activation of Organometallic Iridium Complexes for Catalytic Water and C-H Oxidation

DOI Link: 10.1021/ic402390t

Vibrational manifestations of strong non-Condon effects in the H₃O⁺·X₃(X = Ar, N₂, CH4, H2O) complexes: A possible explanation for the intensity in the “association band” in the vibrational spectrum of water

DOI Link: 10.1039/C2CP24110B

Publications

1992

Observation of charge‐transfer excited states in the I−⋅CH3I, I−⋅CH3Br, and I−⋅CH2Br2 SN2 reaction intermediates using photofragmentation and photoelectron spectroscopies

1991

Nascent vibrational distribution of the O−2 product ion in the photodissociation of (O2)−n= 2–4

Collisional activation of captured intermediates in the gas-phase SN2 reaction Cl– + CH3Br → Br- + CH3Cl

Controlling the internal energy content of size‐selected cluster ions: An experimental comparison of the metastable decay rate and photofragmentation methods of quantifying the internal excitation of (H2O)−n

Bound-bound and bound-free contributions to the absorptions spectrum of (H2O)30-

Size-dependent collisional incorporation of D2O into (H2O)−n around n = 15: implications on the origin of magic numbers in the hydrated electron cluster distribution

Photodestruction spectra of the anionic water clusters, (H2O)−n, n=18 and 30: Absorption to the red of e−aq

1990

Photoabsorption of negative cluster ions near the electron detachment threshold: A study of the (O2)−n system

Isotopic fractionation in low temperature ion–molecule exchange reactions: Enrichment of 22Ne in Ne+n clusters formed by association in an ionized free jet

The angular distribution of photoelectrons ejected from the hydrated electron cluster (H2O)−18