About Our Group:

We design, build and exploit new types of instruments that provide qualitatively new pictures of how chemical reactions occur. By coupling mass-selective vibrational spectroscopy with cryogenic ion processing, we are able to study a wide variety of chemical phenomena, including small molecule activation, gas-liquid interfacial chemistry, and intracluster hydrogen bonding.


October 31, 2023
Dr. Micheal DeLuca (a.k.a. The Tinman) visits us to check out what has become of his “Navy Machine” thirty five years later!! The iPhone used to take this shot says it is “A...
October 19, 2023
During mid-September, James Breton, a 4th Yr. Chemistry Ph.D. Candidate in the Johnson Lab attended his first-ever National Organization for the Professional Advancement of...

Selected Publications:

Deconstructing Water’s Diffuse OH Stretching Vibrational Spectrum with Cold Clusters

Spectroscopic Snapshots of the Proton-transfer Mechanism in Water

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

Vibrational spectral signature of the proton defect in the three-dimensional H+(H2O)21 cluster

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