Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 118, Issue 42, Pages 12243-12250Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp508060z
Keywords
-
Categories
Funding
- NSERC
- Polish Ministry of Science and Higher Education for the Faculty of Chemistry of Wroclaw University of Technology
- College of Arts and Sciences
- Center for Photochemical Sciences of Bowling Green State University
- National Science Foundation
- Italian MIUR
Ask authors/readers for more resources
N-Alkylated indanylidene-pyrroline-based molecular switches mimic different aspects of the light-induced retinal chromophore isomerization in rhodopsin: the vertebrate dim-light visual pigment. In particular, they display a similar ultrashort excited-state lifetime, subpicosecond photoproduct appearance time, and photoproduct vibrational coherence. To better understand the early light-induced dynamics of such systems, we measured and modeled the resonance Raman spectra of the Z-isomer of the N-methyl-4-(5'-methoxy-2',2'-dimethyl-indan-1'-ylidene)-5-methyl-2,3-dihydro-2H-pyrrolium (NAIP) switch in methanol solution. It is shown that the data, complemented with a <70 fs excited-state trajectory computation, demonstrate initial excited-state structural dynamics dominated by double-bond expansion and single-bond contraction stretches. This mode subsequently couples with the five-membered ring inversion and double-bond torsion. These results are discussed in the context of the mechanism of the excited-state photoisomerization of NAIP switches in solution and the 11-cis retinal in rhodopsin.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available