Welcome

 

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.

News

September 20, 2019
The group enjoyed a wonderful evening (and lots of sandwiches) at Paradise Hills Winery yesterday!
ACS Chemistry & Water meeting
August 27, 2019
Mark met up with group alum, Rachael Relph at the ACS Chemistry & Water meeting! Rachael is working a booth advertising her new company, “My Green Lab”. Good luck, Rach!
July 24, 2019
The Johnson lab welcomed New Haven area high school students through the Yale Pathways to Science Summer Scholars Program. Mark shared what inspired him to become a scientist...

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