Translational Diffusion and Unstable Conformer Trapping in Glassy Isopentane at 77 K

Zimányi, László and Krishnan, Sumesh B. and Williford, Emily and Gupta, Shipra and Sepulveda, Jonathan (2019) Translational Diffusion and Unstable Conformer Trapping in Glassy Isopentane at 77 K. JOURNAL OF PHYSICAL CHEMISTRY A, 123 (42). pp. 9102-9112. ISSN 1089-5639 (print); 1520-5215 (online)

Text ZimanyiJChemPhys.pdf Restricted to Registered users only Download (3MB)

Abstract

Diffusional quenching in isopentane (IP) glass at 77 K is demonstrated by the reduction of triphenylene phosphorescence lifetimes in the presence of 1,3-pentadiene and/or molecular oxygen. Fluorescence spectra and lifetimes of cis- A nd trans-1,2-di(1-methyl-2-naphthyl)ethene in IP glass at 77 K reveal that the cis → trans photoisomerization leads to the trapping of unstable conformers of the trans isomer. The claim that IP at 77 K is not sufficiently viscous to trap unstable photoproduct conformers is invalidated. © Copyright © 2019 American Chemical Society.

Actions (login required)

Edit Item