Relaxation pathways and fs dynamics in a photoswitchable intramolecular D→A energy transfer system

• Published in: Chemical physics letters Vol. 343; no. 1; pp. 83 - 90
• Main Authors: Ramsteiner, I.B, Hartschuh, A, Port, H
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 27.07.2001; Elsevier Science
• Subjects: Atomic and molecular physics; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Light-sensitive materials; Molecular properties and interactions with photons; Optical materials; Optics; Photon interactions with molecules; Physics; Sulfur nitrogen heterocycle; Photoinduced effect; Esters; Lactams; Experimental study; Intramolecular energy transfer; Condensed benzenic compound; Coumarin; Isomers; Lactones; Pump probe spectrometry; Transient species; Time resolved spectroscopy; Excitation; Absorption spectra; Photosensitive material; Photochromic materials; Organic compounds; Oxygen nitrogen heterocycle
• DOI: 10.1016/S0009-2614(01)00683-2
• ISSN: 0009-2614

A photoswitchable energy transfer system (donor–switch–acceptor) is examined in a polymer environment using time-resolved pump and probe spectroscopy. The system consists of a photochromic fulgide derivative acting as switching unit, an anthracene group as energy donor and a coumarin moiety as acceptor. The general value of the concept has already been proven by different spectroscopic methods. To get a deeper insight into the complex energy relaxation process, both the supermolecule and all its subunits are studied separately. The role of the switch is analysed by comparing spectra and transients of both isomeric forms.