Marsha I. Lester
Get Marsha I. Lester essential facts below. View Videos or join the Marsha I. Lester discussion. Add Marsha I. Lester to your topic list for future reference or share this resource on social media.
Marsha I. Lester
Marsha Lester
Marsha Lester 2010 Ullyot Public Affairs Lecture.JPG
Marsha Lester at the Ullyot Public Affairs Lecture in 2010.
NationalityUnited States
Alma materDouglass Residential College, Rutgers University
Columbia University
Known forCriegee intermediates
Scientific career
FieldsPhysical Chemistry
InstitutionsUniversity of Pennsylvania
ThesisVibrational Relaxation Dynamics in Bulk Gases and Supersonic Molecular Beams (1981)
Doctoral advisorGeorge Flynn

Marsha Isack Lester is an American physical chemist. She is currently the Edmund J. Kahn Distinguished Professor of Chemistry at the University of Pennsylvania.[1] Lester uses both theoretical and experimental methods to study the physical chemistry of volatile organic compounds present in the earth's atmosphere. Her current work focuses on the hydroxyl radical and Criegee intermediates.


Lester graduated with a B.A. from Douglass Residential College, an institution for women within Rutgers University, in 1976. She then earned her Ph.D. from Columbia University in 1981 in the laboratory of George Flynn. Her thesis was entitled Vibrational Relaxation Dynamics in Bulk Gases and Supersonic Molecular Beams.[2] She carried out postdoctoral work as a National Science Foundation Fellow at Bell Laboratories from 1981 to 1982.[1]


Currently she works as a professor at University of Pennsylvania[1] from which she has received the Edmund J. and Louise W. Kahn Award in the Natural Sciences. Lester was the first female chair of the department of chemistry, a position she held from 2005 to 2009.[3][4] She was a founder, and is currently chair, of the Penn Forum for Women Faculty, a group formed to support female faculty at the university.[4] Lester is also well known as the editor of the Journal of Chemical Physics.[5]

Previously, Lester was the chair of the Division of Laser Science of the American Physical Society. She also worked for American Chemical Society. Later on, she was the chair of the Department of Energy's Council for Chemical and Biochemical Sciences.


Lester's research group utilizes theoretical and experimental approaches to study chemical reactions. She focuses on modeling potential energy surfaces between reactive partners, with an emphasis on volatile organic compounds present in the earth's atmosphere. She has published extensively on the interactions and reactions of the hydroxyl radical.[6] Lester's group was the first to obtain an infrared spectrum of the hydrogen trioxide radical. Her lab currently works on modeling the stability of this radical and its conformers.[1]

Currently, her group focuses on photo-induced chemistry of Criegee intermediates, an intermediate in the alkene ozonolysis pathway. This pathway is a primary oxidation pathway for alkenes in the troposphere and generates atmospheric hydroxyl radicals. Her lab synthesizes Criegee intermediates in order to further study their chemical reactions using spectroscopy.[1]

Her lab also currently focuses on modeling and observing the collisional quenching of excited hydroxyl radicals. Quenching impacts the concentration of hydroxyl radicals in the atmosphere, and is therefore of environmental interest.

Her research group at the University of Pennsylvania was behind the development of open shell complexes.



  1. ^ a b c d e Marsha I. Lester, Department of Chemistry, University of Pennsylvania.
  2. ^ "The Flynn Group -- Theses and Publications". Retrieved .
  3. ^ "Marsha I. Lester | Pennergy". Retrieved .
  4. ^ a b Ahmed, Farooq (2017-12-19). "Q&As with Marsha I. Lester". Proceedings of the National Academy of Sciences: 201721202. doi:10.1073/pnas.1721202115. ISSN 0027-8424. PMC 5798388. PMID 29279378.
  5. ^ "Biography". American Institute of Physics. Archived from the original on June 1, 2013. Retrieved 2013.
  6. ^, National Academy of Sciences -. "Marsha Lester". Retrieved .
  7. ^ "National Academy of Sciences Members and Foreign Associates Elected". Retrieved .

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



Music Scenes