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Volumn 21, Issue 17, 2002, Pages 3511-3518

Light-emitting cyclopalladated complexes of 6-phenyl-2,2′-bipyridines with Hydrogen-bonding functionality

Author keywords

[No Author keywords available]

Indexed keywords

COMPLEXATION; CRYSTAL STRUCTURE; ELECTRONIC PROPERTIES; HYDROGEN BONDS; LUMINESCENCE; OLIGOMERS; X RAY DIFFRACTION ANALYSIS;

EID: 0001600283     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om020204j     Document Type: Article
Times cited : (131)

References (83)
  • 38
    • 0035823954 scopus 로고    scopus 로고
    • Alternative procedures based on a highly competitive solvent-less approach have been recently reviewed: Cave, G. W. V.; Raston, C. L.; Scott, J. L. Chem. Commun. 2001, 2159.
    • (2001) Chem. Commun. , pp. 2159
    • Cave, G.W.V.1    Raston, C.L.2    Scott, J.L.3
  • 39
    • 0038745876 scopus 로고    scopus 로고
    • note
    • More severe conditions (heating at 180 °C for 72 h) resulted in a slightly different behavior, since complete recovery of the initial spectrum was only obtained after waiting a much longer time. Indeed, the presence of carboxyl acid dimers in the solid state (that would account for equally strongly. H-bonded acid groups and therefore IR stretching bands of similar magnitude) cannot be completely discarded. In the latter case, a prediction of the actual role of water in the crystal packing is very difficult.
  • 75
    • 0038069399 scopus 로고    scopus 로고
    • note
    • Actually, a very weak emission around 500 nm was detected for all the species in DMSO and dichloromethane. However, the emission output was at the limit of the sensitivity of our equipment and therefore was not considered.
  • 78
    • 0003879317 scopus 로고
    • VCH: New York
    • In principle, an excimer is formed by the combination of a ground-state molecule with an excited-state molecule, a process quite common for aromatic systems (for example, see: Klessinger, M.; Michl, J. Excited States and Photochemistry of Organic Molecules; VCH: New York, 1995). The excimer luminescence is expected to be at longer wavelengths than the monomer luminescence, and the associated emission band is commonly broad and without vibrational structure owing to a transition into the unbound ground state. As an excited-state process, excimer formation also competes with other deactivating processes of the initially formed excited state of the monomer. It should be noted that while this definition fully fits the ππ* luminescence derived from interactions between aromatic moieties (one of them being in its own excited state), the term "excimeric emission" is not formally correct for a MMLCT excited state, for which a metal-metal interaction in the ground state is usually considered. The latter would be more appropriately described as the excited state of a dimeric (or oligomeric) discrete system. However, since in the literature MMLCT emission is very often also called excimeric emission, we decided to use this term in this larger meaning also here, although formal differences should not be forgotten.
    • (1995) Excited States and Photochemistry of Organic Molecules
    • Klessinger, M.1    Michl, J.2
  • 80
    • 0038407784 scopus 로고    scopus 로고
    • note
    • The influence of higher-energy excited states on the dynamics of emitting states by mixing between the states, with minimal perturbation on the emission energy, is well known. For example, see ref 6.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.