Transient fluorescence in flavin/TCNQ hetero LB film

Kyung Sang Cho, Jeong Woo Choi, Won Hong Lee, Nam Woong Song, Dongho Kim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The photoinduced electron transfer rate in hetero Langmuir-Blodgett (LB) films composed of 7,8-dimethyl-10-dodecyl isoalloxazine (flavin) and N-docosylquinolinium tetracyanoquinodimethan (TCNQ) was investigated. Flavin and TCNQ were used as electron donor and acceptor, respectively. The time-resolved fluorescence decay of three different types of flavin/TCNQ hetero LB films such as mixed layer, head (hydrophilic functional group)-to-head interfaced structure and tail (hydrophobic alkyl chain)-to-tail interfaced structure were measured by a time-correlated single photon counting (TCSPC) method. Electron transfer rate from photoexcited donor to acceptor depends on the distance between functional groups, since the fluorescence decay of head-to-head interfaced hetero LB films occurs faster than that of tail-to-tail interfaced hetero LB films. Based on the faster electron transfer of flavin/TCNQ hetero LB films than that of flavin/viologen hetero LB films, the redox potential difference between donor and acceptor affects the charge transfer rate.

Original languageEnglish
Pages (from-to)373-377
Number of pages5
JournalThin Solid Films
Volume327-329
Issue number1-2
DOIs
Publication statusPublished - 1998 Jan 1

Fingerprint

Langmuir Blodgett films
Langmuir-Blodgett films
Fluorescence
fluorescence
electron transfer
Electrons
Functional groups
Viologens
decay
4,6-dinitro-o-cresol
Charge transfer
counting
Photons
charge transfer
photons
electrons

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Cho, K. S., Choi, J. W., Lee, W. H., Song, N. W., & Kim, D. (1998). Transient fluorescence in flavin/TCNQ hetero LB film. Thin Solid Films, 327-329(1-2), 373-377. https://doi.org/10.1016/S0040-6090(98)00656-7
Cho, Kyung Sang ; Choi, Jeong Woo ; Lee, Won Hong ; Song, Nam Woong ; Kim, Dongho. / Transient fluorescence in flavin/TCNQ hetero LB film. In: Thin Solid Films. 1998 ; Vol. 327-329, No. 1-2. pp. 373-377.
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Cho, KS, Choi, JW, Lee, WH, Song, NW & Kim, D 1998, 'Transient fluorescence in flavin/TCNQ hetero LB film', Thin Solid Films, vol. 327-329, no. 1-2, pp. 373-377. https://doi.org/10.1016/S0040-6090(98)00656-7

Transient fluorescence in flavin/TCNQ hetero LB film. / Cho, Kyung Sang; Choi, Jeong Woo; Lee, Won Hong; Song, Nam Woong; Kim, Dongho.

In: Thin Solid Films, Vol. 327-329, No. 1-2, 01.01.1998, p. 373-377.

Research output: Contribution to journalArticle

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N2 - The photoinduced electron transfer rate in hetero Langmuir-Blodgett (LB) films composed of 7,8-dimethyl-10-dodecyl isoalloxazine (flavin) and N-docosylquinolinium tetracyanoquinodimethan (TCNQ) was investigated. Flavin and TCNQ were used as electron donor and acceptor, respectively. The time-resolved fluorescence decay of three different types of flavin/TCNQ hetero LB films such as mixed layer, head (hydrophilic functional group)-to-head interfaced structure and tail (hydrophobic alkyl chain)-to-tail interfaced structure were measured by a time-correlated single photon counting (TCSPC) method. Electron transfer rate from photoexcited donor to acceptor depends on the distance between functional groups, since the fluorescence decay of head-to-head interfaced hetero LB films occurs faster than that of tail-to-tail interfaced hetero LB films. Based on the faster electron transfer of flavin/TCNQ hetero LB films than that of flavin/viologen hetero LB films, the redox potential difference between donor and acceptor affects the charge transfer rate.

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