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

May 26, 2026
Congratulations to Dr. Payten Harville on a very successful defense!  She was joined by many friends and her parents (pictured on the right). Payten has held the group...
May 26, 2026
Congratulations to Dr. Abhijit Rana on quite the amazing thesis defense! He was joined by many friends and family members in person and over zoom. The group will certainly...
May 18, 2026
Congratulations Abhi, on this well-deserved recognition. And let’s not forget that the 4-ABA journey was a team effort and so this award also goes to acknowledge the...

Selected Publications:

Autobiography of Mark A. Johnson


Microcanonical Kinetics of Water-Mediated Proton Transfer in 4ABAH+‧(H2O)n=4-6 Clusters (ABA = Aminobenzoic Acid): A Model System for Size-Dependent Relaxation to Ergodic Behavior


Microcanonical Kinetics of Water-Mediated, Long Range Proton Transfer in Microhydrated 4-Aminobenzoic Acid