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Volumn 39, Issue 12, 2000, Pages 2163-2167

Surface-confined light harvesting, energy transfer, and amplification of fluorescence emission in chromophore-labeled self-assembled monolayers

Author keywords

Chromophores; Energy transfer; Fluorescence spectroscopy; Light harvesting; Monolayers

Indexed keywords

ARTICLE; CHEMICAL BOND; CHEMICAL STRUCTURE; CHROMATOPHORE; DIPOLE; ENERGY ABSORPTION; ENERGY TRANSFER; FLUORESCENCE;

EID: 0034674312     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-3773(20000616)39:12<2163::AID-ANIE2163>3.0.CO;2-X     Document Type: Article
Times cited : (80)

References (60)
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    • a) S. L. Gilat, A. Adronov, J. M. J. Fréchet, Angew. Chem. 1999, 111, 1519-1524; Angew. Chem. Int. Ed. 1999, 38, 1422-1427;
    • (1999) Angew. Chem. Int. Ed. , vol.38 , pp. 1422-1427
  • 40
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    • A. Ulman, Chem. Rev. 1996, 96, 1533-1554.
    • (1996) Chem. Rev. , vol.96 , pp. 1533-1554
    • Ulman, A.1
  • 51
    • 0343766870 scopus 로고    scopus 로고
    • note
    • Reabsorption of donor emission by neighboring acceptors instead of Förster energy transfer is considered to be nominal because of the 2-dimensional alignment of donor and acceptor chromophores as a mixed monolayer. The emission spectra from a mixed monolayer of 3 and 6 (r = 4) were measured after small changes of the incidence angle α of the excitation beam (Δα < 20 ). Only minor changes in the emission spectra were observed and the relative emission intensity from the donor and acceptor chromophores remained the same.
  • 53
    • 0343331031 scopus 로고    scopus 로고
    • note
    • The assembly of alkoxysilanes is a two-step process that involves pretreatment of the adsorbates prior to adsorption on the substrate. Initially, siloxane dimers and trimers are formed in the adsorbate solution by an acid-catalyzed condensation. Upon immersion of the silicon wafer, these oligomers adsorb onto the silanol surface by hydrogen bonding and become covalently bound to the surface by curing the wafers. The adsorption of the chromophor oligomers from solution occurs randomly. Therefore, the chromophore composition on the monolayer may not be the same as in solution.
  • 54
    • 0343331032 scopus 로고    scopus 로고
    • note
    • The donor (D) and acceptor (A) distribution in the siloxane dimers and trimers was calculated by reaction kinetics from the molar amount of D and A in solution. It is assumed that the reaction rate for siloxane formation is not affected by its substituents and that the reaction is pseudo zero order in acid. The simulated mixture composition was analyzed at various reaction times. The relative distribution of D and A varies slightly with reaction time and rate, and ranges for the oligomer distribution are given. A mixture of mole ratio r = D/A = 4 contains 70-76 mol% dimers and trimers without acceptor (DDD, DD) and 19-20 mole% dimers and trimers having one acceptor (AD, ADD, DAD). Only 30-33 mol% of DD and DDD oligomers are formed for a mixture of mole ratio r = 1 and 32-33 mol% of dimers and trimers contain one acceptor.
  • 55
    • 0039054420 scopus 로고    scopus 로고
    • Chromophore-labeled SAMs have recently been reported as fluorescence-based chemical sensors: a) M. Lösche. Curr. Opin. Solid State Mater. Sci. 1997, 2, 546-536;
    • (1997) Curr. Opin. Solid State Mater. Sci. , vol.2 , pp. 546-1536
    • Lösche, M.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.