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Volumn 122, Issue 12, 2000, Pages 2840-2849

Stepwise charge separation in heterotriads. Binuclear Ru(II)-Rh(III) complexes on nanocrystalline titanium dioxide

Author keywords

[No Author keywords available]

Indexed keywords

NANOPARTICLE; RHENIUM COMPLEX; RUTHENIUM COMPLEX; TITANIUM DIOXIDE;

EID: 0034728691     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja992755f     Document Type: Article
Times cited : (109)

References (93)
  • 66
    • 0342278202 scopus 로고    scopus 로고
    • note
    • Abbreviations used in this paper: bpy = 2,2′-bipyridine; dmb = 4,4′-dimethyl-2,2′-bipyridine; deb = 4,4′-dicarboxy-2,2′-bipyridine; dmp = 4,7-dimethyl-1,10-phenanthroline; BL = 1,2-bis[4-(4′-methyl-2,2′-bipyridyl)]ethane.
  • 69
    • 0343147776 scopus 로고    scopus 로고
    • note
    • 2.
  • 74
    • 0342713240 scopus 로고    scopus 로고
    • note
    • 2(dmb) excited states have already disappeared within the laser pulse. Thus, what is monitored in Figure 5A is just the long tail portion of a strongly quenched emission.
  • 77
    • 0342278197 scopus 로고    scopus 로고
    • note
    • 0 -logI(t), is not expected to parallel exactly that of a true emission signal, I(t), except for the "optically diluted" limit (i.e., apparent bleachings with ΔA ≤ 0.1).
  • 80
    • 0342713239 scopus 로고    scopus 로고
    • note
    • 2 = 6.8 μs (84%).
  • 81
    • 0343147777 scopus 로고    scopus 로고
    • note
    • 66 The difference in excited-state redox potential is probably somewhat smaller, because of partial compensation in the energy of the MLCT state.
  • 83
    • 0343147773 scopus 로고    scopus 로고
    • note
    • The solvent can affect excited-state decay kinetics in several ways. Peculiar to deb-based systems is the possibility that the solvent affects the degree of protonation of the carboxylic groups. In the case of the mononuclear model, this is expected to affect the MLCT excited-state energy, and thus the energy gap for radiationless deactivation. In the dyads, this is expected to affect Rh(III)/(II) redox potential, and thus the driving force of the intramolecular electron transfer step. In aqueous media, where the protonation of the carboxylic groups can be precisely controlled, a gradual acceleration in decay rate with increasing degree of protonation has been demonstrated for the dyads (M. T. Indelli, unpublished results).
  • 84
    • 0342713238 scopus 로고    scopus 로고
    • note
    • While the carboxylate groups grafted to the surface are certainly deprotonated, the actual number of groups grafted and the overall state of protonation are not known. The arrangement of Figure 10 has simply been chosen for graphical purposes.
  • 89
    • 0343147775 scopus 로고    scopus 로고
    • note
    • 70
  • 90
    • 0342713236 scopus 로고    scopus 로고
    • note
    • This model assumes that no recombination between injected electrons and Ru(III) centers takes place during this period. Considering this assumption, the F value estimated from the transient spectral changes should be taken as a lower limit for the efficiency of stepwise injection.
  • 91
    • 0002243915 scopus 로고
    • 2 (eqs 4 and 5) and of intramolecular back electron transfer (eq 6) were set to be much faster then the instrument response for the measured data. Note that on the 100 ns time scale these data was simulated over, interfacial charge recombination (eq 9) does not alter the simulated spectra, consistent with experimental observations of Figure 9.
    • (1993) J. Photochem. Photobiol. A: Chem. , vol.70 , pp. 29
    • Yoshimura, A.1    Hoffman, M.Z.2    Sun, H.3
  • 92
    • 0342278195 scopus 로고    scopus 로고
    • note
    • 2, under our experimental conditions, of -0.50 V vs SCE.
  • 93
    • 0342278194 scopus 로고    scopus 로고
    • Manuscript in preparation
    • Kleverlaan, C. J, et al. Manuscript in preparation.
    • Kleverlaan, C.J.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.