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Nondestructive readout fluorescence memory based on a gallium(III) corrole complex and photochromic cis-1,2-dithienylethene

Title
Nondestructive readout fluorescence memory based on a gallium(III) corrole complex and photochromic cis-1,2-dithienylethene
Authors
Kang, JijoonYou, Youngmin
Ewha Authors
유영민
SCOPUS Author ID
유영민scopus
Issue Date
2015
Journal Title
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
ISSN
1088-4246JCR Link

1099-1409JCR Link
Citation
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES vol. 19, no. 43468.0, pp. 281 - 287
Keywords
fluorescence memorycorrolesphotochromismenergy transfer
Publisher
WORLD SCI PUBL CO INC
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
Photochromic switching of fluorescence emission provides a viable principle to creation of all optical molecular memory. Successful operation of the fluorescence memory requires deliberate control of the energetics between a fluorophore and a photochrome. One essential requirement is that photoexcitation for fluorescence emission does not interfere with the photochromic processes. Gallium(III) corrole complexes outfit the condition because their fluorescence emissions display large Stokes shifts, permitting photoexcitation at the optical window where the photochromism of cis-1,2-dithienylethene is not executed. To demonstrate the capability for fluorescence memory, we prepared molecularly dispersed poly(methyl methacrylate) (PMMA) films of a gallium corrole complex and cis-1,2-dithienylethene. The memory cycle comprising fluorescence readout and reversible photochromic switching of the fluorescence emission is fully reversible without suffering from fatigue during repeated operation. The corresponding fluorescence on/off ratio is greater than those of previous memory based on porphyrins. Fluorescence lifetime measurements employing time-correlated single photon counting techniques reveal occurrence of fast energy transfer (similar to 109 s(-1)) which is effectively gated by the photochromism.
DOI
10.1142/S1088424615500017
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엘텍공과대학 > 화학신소재공학전공 > Journal papers
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