Abstract
Direct access to trans-cis photoisomerization in a metastable state photoacid (mPAH) remains challenging owing to the presence of competing excited-state relaxation pathways and multiple transient isomers with overlapping spectra. Here, we reveal the photoisomerization dynamics in an indazole mPAH using time-resolved fluorescence (TRF) spectroscopy by exploiting a unique property of this mPAH having fluorescence only from the trans isomer. The combination of these experimental results with time-dependent density function theory (TDDFT) calculations enables us to gain mechanistic insight into this key dynamical process.
| Original language | English |
|---|---|
| Pages (from-to) | 4062-4070 |
| Number of pages | 9 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 26 |
| Issue number | 5 |
| DOIs | |
| State | Published - Jan 4 2024 |
Funding
This research was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division, Separation Sciences. A. R. M. was supported in part by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists (WDTS) under the Science Undergraduate Laboratory Internships program. Part of the steady-state fluorescence spectral measurements was conducted as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. This work was produced by UT-Battelle LLC under Contract No. AC05-00OR22725 with the U. S. Department of Energy. The publisher acknowledges the U.S. Government license to provide public access under the DOE Public Access Plan (https://energy.gov/downloads/doe-public-access-plan). This research was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division, Separation Sciences. A. R. M. was supported in part by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists (WDTS) under the Science Undergraduate Laboratory Internships program. Part of the steady-state fluorescence spectral measurements was conducted as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. This work was produced by UT-Battelle LLC under Contract No. AC05-00OR22725 with the U. S. Department of Energy. The publisher acknowledges the U.S. Government license to provide public access under the DOE Public Access Plan ( https://energy.gov/downloads/doe-public-access-plan ).
| Funders | Funder number |
|---|---|
| DOE Public Access Plan | |
| Office of Workforce Development for Teachers | |
| Separation Sciences | |
| U.S. Department of Energy | |
| Office of Science | |
| Basic Energy Sciences | |
| Oak Ridge National Laboratory | |
| Chemical Sciences, Geosciences, and Biosciences Division | |
| UT-Battelle | AC05-00OR22725 |