Optical properties and dynamics of a photochromic bisthienylethene in solution and in a polymer film

Autor:	Jean-Marie Lehn, H. H. Nelson, Sylvain L. Gilat, Jeffrey C. Owrutsky, Andrew P. Baronavski, Gerasimos M. Tsivgoulis, Oh Kil Kim
Rok vydání:	1998
Předmět:	chemistry.chemical_classification Molecular switch Materials science General Physics and Astronomy Polymer Photochemistry Optical switch Photochromism chemistry Dispersion (optics) Ultrafast laser spectroscopy Femtosecond Copolymer Physical and Theoretical Chemistry
Zdroj:	Chemical Physics Letters. 293:555-563
ISSN:	0009-2614
DOI:	10.1016/s0009-2614(98)00816-1
Popis:	Optical switching dynamics and fatigue were investigated for a photochromic molecular switch, bis(5-pyridyl-2-methylthien-3-yl)perfluorocyclopentene (PMTFC). Femtosecond transient absorption was measured using 270 nm pump and broadband visible probe pulses for samples in ethanol solution and as a dispersion film of poly(butyl acrylate-co-acrylic acid). The optical switching occurs in ≤3 ps in both cases. The spectral evolution observed in solution within 20 ps is absent in the film, suggesting that the switching dynamics are sensitive to the molecular environment. PMTFC in the copolymer film demonstrated evidence of fatigue after ∼1500 complete cycles of optical switching.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56a4eb5590df571a4a14e5602df0068c https://doi.org/10.1016/s0009-2614(98)00816-1 Zobrazit plný text záznamu Full Text from ScienceDirect