The initial development of photoinduced anisotropy in highly photosensitive monolayers of an aminoazobenzene molecule (dMR, a derivative of o-methyl red) that are initially randomized using circularly polarized light is found to be significantly slower than in monolayers randomized by thermal relaxation. We propose that this is a direct consequence of the slow thermal relaxation of isomers from the cis to the trans state and suggest that such considerations are important in designing even more sensitive photoactive monolayers and in understanding their photodynamics.
Bibliographical noteFunding Information:
We thank S. A. Diddams of NIST, Boulder, CO, for the loan of equipment. This work was supported by the NSF MRSEC program under Grant No. DMR-0820579.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)