Photochromic switching of excited-state intramolecular proton-transfer (ESIPT) fluorescence: A unique route to high-contrast memory switching and nondestructive readout

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Aiming at the high-contrast photochromic switching of fluorescence emission and its perfect nondestructive readout, a polymer film highly loaded with a specific photochromic compound, 1,2-bis(2'-methyl-5'-phenyl-3'-thienyl)perfluorocyclopentene (BP-BTE), and an excited-state intramolecular proton-transfer (ESIPT)-active compound, 2,5-bis(5'-tert-butyl-benzooxazol-2'-yl) hydroquinone (DHBO), was employed in this work. The special class of photochrome, BP-BTE, has negligible absorbance at 415 nm both in the open form and in the 365 nm photostationary state (PSS), and the ESIPT fluorophore, DHBO, emits large Stokes' shifted (175 nm; lambda(abs)(max) = 415 nm, lambda(em)(max) = 590 nm) and enhanced fluorescence (Phi(powder)(F) = 10%, Phi(soln)(F) = 2%). Bistability, high-contrast switching (on/ off fluorescence switching ratio > 290), nondestructive readout (over 125000 shots), and erasability were all together accomplished in this novel recording medium.
Publisher
AMER CHEMICAL SOC
Issue Date
2006-11
Language
English
Article Type
Article
Citation

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.128, no.45, pp.14542 - 14547

ISSN
0002-7863
DOI
10.1021/ja0637604
URI
http://hdl.handle.net/10203/282765
Appears in Collection
CBE-Journal Papers(저널논문)
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