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Volumn 43, Issue 14, 2004, Pages 4471-4481

Energy transfer pathways in dinuclear heteroleptic polypyridyl complexes: Through-space vs through-bond interaction mechanisms

Author keywords

[No Author keywords available]

Indexed keywords

1,2,4 TRIAZOLE DERIVATIVE; 1,3 BIS[5 (2 PYRIDYL) 1H 1,2,4 TRIAZOL 3 YL]BENZENE; 1,4 BIS[5 (2 PYRIDYL) 1H 1,2,4 TRIAZOL 3 YL]BENZENE; BENZENE DERIVATIVE; LIGAND; METAL COMPLEX; OSMIUM DERIVATIVE; PYRIDINE DERIVATIVE; RUTHENIUM DERIVATIVE; UNCLASSIFIED DRUG;

EID: 3142661836     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic049896p     Document Type: Article
Times cited : (44)

References (96)
  • 72
    • 3142781172 scopus 로고
    • Ph.D. Thesis, Leiden University
    • Hage, R. Ph.D. Thesis, Leiden University, 1991.
    • (1991)
    • Hage, R.1
  • 82
    • 3142737018 scopus 로고    scopus 로고
    • note
    • III b
  • 86
    • 3142696042 scopus 로고    scopus 로고
    • note
    • For the mononuclear complexes it would be expected that a second deprotonation step (due to the unbound 1,2,4-triazole ring) would be observed at higher pH. However, the effect on the absorption spectrum of the complex of deprotonation of such a peripheral group would be expected to be negligible, considering the limited influence that substituents in the C3 position of the 1,2,4-triazole have on the electronic properties of this class of complexes.
  • 90
    • 3142678482 scopus 로고    scopus 로고
    • note
    • In protic media the rate of proton exchange is expected to be much faster than the lifetime of the excited state and hence an averaged lifetime is observed (i.e., single exponential) and hence addition of protic solvents to the acetonitrile solutions would be expected to result in a monoexponential lifetime being observed. The reduction in emission intensity in the presence of protic solvents, however, makes such experiments ambiguous.
  • 93
    • 3142704880 scopus 로고    scopus 로고
    • note
    • For the deprotonated complexes, this emission lies in a region where the detector of the time-resolved single photon counting setup has a very low sensitivity. The Ru-based emission is also comparatively strong-in terms of number of photons per time unit-even in the farred part of the spectrum. Thus, it is not surprising that an Os-based emission, with a lifetime very similar to that of the Ru emission, cannot be resolved in pRuOs and mRuOs.
  • 95
    • 3142773988 scopus 로고    scopus 로고
    • note
    • EnT would then correspond to a <120 meV increase in driving force for the hopping. Clearly, the effect of protonation of the triazole on the energy difference between the MLCT states on the peripheral and the bridging ligands is much larger than both these estimates.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.