Photochemical "triode" molecular signal transducer

Amy E. Keirstead, James W. Bridgewater, Yuichi Terazono, Gerdenis Kodis, Stephen Straight, Paul A. Liddell, Ana L Moore, Thomas A Moore, John Devens Gust

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

A molecular "hexad" in which five bis(phenylethynyl)anthracene (BPEA) fluorophores and a dithienylethene photochrome are organized by a central hexaphenylbenzene unit has been prepared. Singlet-singlet energy transfer among the BPEA units occurs on the 0.4 and 60 ps time scales, and when the dithienylethene is in the open form, the BPEA units fluoresce in the 515 nm region with a quantum yield near unity. When the dithienylethene is photoisomerized by UV light to the closed form, which absorbs in the 500-700 nm region, the closed isomer strongly quenches all of the excited singlet states of BPEA via energy transfer, causing the fluorescence quantum yield to drop to near zero. This photochemical behavior permits the hexad to function in a manner analogous to a triode vacuum tube or transistor. When a solution of the hexad is irradiated with steady-state light at 350 nm and with red light (>610 nm) of modulated intensity, the BPEA fluorescence excited by the 350 nm light is modulated accordingly. The fluorescence corresponds to the output of a triode tube or transistor and the modulated red light to the grid signal of the tube or gate voltage of the transistor. Frequency modulation, amplitude modulation, and phase modulation are all observed. The unusual ability to modulate intense, shorter-wavelength fluorescence with longer-wavelength light could be useful for the detection of fluorescence from probe molecules without interference from other emitters in biomolecular or nanotechnological applications.

Original languageEnglish
Pages (from-to)6588-6595
Number of pages8
JournalJournal of the American Chemical Society
Volume132
Issue number18
DOIs
Publication statusPublished - May 12 2010

Fingerprint

Triodes
Anthracene
Transducers
Fluorescence
Light
Transistors
Energy Transfer
Quantum yield
Energy transfer
Wavelength
Electron tubes
Amplitude modulation
Fluorophores
Phase modulation
Frequency modulation
Ultraviolet Rays
Vacuum
Excited states
Ultraviolet radiation
Isomers

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Keirstead, A. E., Bridgewater, J. W., Terazono, Y., Kodis, G., Straight, S., Liddell, P. A., ... Gust, J. D. (2010). Photochemical "triode" molecular signal transducer. Journal of the American Chemical Society, 132(18), 6588-6595. https://doi.org/10.1021/ja1019595

Photochemical "triode" molecular signal transducer. / Keirstead, Amy E.; Bridgewater, James W.; Terazono, Yuichi; Kodis, Gerdenis; Straight, Stephen; Liddell, Paul A.; Moore, Ana L; Moore, Thomas A; Gust, John Devens.

In: Journal of the American Chemical Society, Vol. 132, No. 18, 12.05.2010, p. 6588-6595.

Research output: Contribution to journalArticle

Keirstead, AE, Bridgewater, JW, Terazono, Y, Kodis, G, Straight, S, Liddell, PA, Moore, AL, Moore, TA & Gust, JD 2010, 'Photochemical "triode" molecular signal transducer', Journal of the American Chemical Society, vol. 132, no. 18, pp. 6588-6595. https://doi.org/10.1021/ja1019595
Keirstead AE, Bridgewater JW, Terazono Y, Kodis G, Straight S, Liddell PA et al. Photochemical "triode" molecular signal transducer. Journal of the American Chemical Society. 2010 May 12;132(18):6588-6595. https://doi.org/10.1021/ja1019595
Keirstead, Amy E. ; Bridgewater, James W. ; Terazono, Yuichi ; Kodis, Gerdenis ; Straight, Stephen ; Liddell, Paul A. ; Moore, Ana L ; Moore, Thomas A ; Gust, John Devens. / Photochemical "triode" molecular signal transducer. In: Journal of the American Chemical Society. 2010 ; Vol. 132, No. 18. pp. 6588-6595.
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