Enhancement of two-photon photochromism of a diarylethene via Förster's resonance energy transfer from 2PA fluorene dyes

ORGN 85

Kevin D. Belfield, belfield@mail.ucf.edu1, Mykhailo V. Bondar, mike_bondar@hotmail.com2, Claudia C. Corredor, ccorredo@mail.ucf.edu1, and Olga V. Przhonska2. (1) Department of Chemistry and CREOL, College of Optics and Photonics, University of Central Florida, 4000 Central Florida Blvd., P.O. Box 162366, Orlando, FL 32816-2366, (2) Department of Photoactivity, Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev, Ukraine
Resonance energy transfer from two-photon absorbing fluorene derivatives to the photochromic compound 3,4-bis-(2,4,5-trimethyl-thiophen-3-yl)furan-2,5-dione (PC 1) was investigated in hexane under one- and two-photon excitation. The quenching of the steady-state fluorescence of donor molecules in the presence of the diarylethene acceptor was used to study the nature of resonance energy transfer. The Förster's distances and critical acceptor concentrations were determined for nonbound donor-acceptor pairs in homogeneous molecular ensembles. Quite significantly, up to a two-fold enhancement in the velocity of the photochromic transformation of 1, in the presence of two-photon absorbing fluorene derivatives, was demonstrated.
 

Process R&D, Physical Organic Chemistry, Heterocycles, Aromatics, Metal-Mediated Reactions
8:00 PM-10:00 PM, Sunday, March 25, 2007 Hyatt Regency Chicago -- Riverside Center, Poster

Division of Organic Chemistry

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007