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Volumn 129, Issue 27, 2007, Pages 8544-8551

Ruthenium complexes that break the rules: Structural features controlling dual emission

Author keywords

[No Author keywords available]

Indexed keywords

FLUID SOLUTION; ISOMERIC SYSTEMS; NONEQUILIBRATED EMISSIVE STATES; PHENANTHROLINE (PHEN) LIGANDS; ROOM TEMPERATURE;

EID: 34447509732     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja071124f     Document Type: Article
Times cited : (102)

References (34)
  • 2
    • 84985611052 scopus 로고    scopus 로고
    • For example, fluorescein, arguably the most widely used fluorescent dye, was first synthesized by Adolph Von Baeyer in 1871. See: Huisgen, R. Angew. Chem., Int. Ed. Engl. 1986, 25, 297-311.
    • For example, fluorescein, arguably the most widely used fluorescent dye, was first synthesized by Adolph Von Baeyer in 1871. See: Huisgen, R. Angew. Chem., Int. Ed. Engl. 1986, 25, 297-311.
  • 15
    • 0036067621 scopus 로고    scopus 로고
    • Tor, Y. Synlett. 2002, 1043-1054.
    • (2002) Synlett , pp. 1043-1054
    • Tor, Y.1
  • 26
    • 34447553410 scopus 로고    scopus 로고
    • While there was no evidence for phosphorescence at room temperature, it was observed at 77 K, with a lifetime of ca. 450 ms. This is in contrast to the two lifetimes we observed at 77 K for complex 4, which were fit to lifetimes of 4.5 and 23 μs
    • While there was no evidence for phosphorescence at room temperature, it was observed at 77 K, with a lifetime of ca. 450 ms. This is in contrast to the two lifetimes we observed at 77 K for complex 4, which were fit to lifetimes of 4.5 and 23 μs.
  • 27
    • 34447546611 scopus 로고    scopus 로고
    • While representational potential energy diagrams such as Figure 4 may appear to suggest that radiative and nonradiative processes are equally affected by the displacement along the specified nuclear coordinate, this is not necessarily the case. The two processes may occur along different coordinates, and thus, there may be significant displacement along a coordinate that impacts a radiative transition, but does not affect nonradiative decay. See ref 22. We hypothesize that this is the case with our system
    • While representational potential energy diagrams such as Figure 4 may appear to suggest that radiative and nonradiative processes are equally affected by the displacement along the specified nuclear coordinate, this is not necessarily the case. The two processes may occur along different coordinates, and thus, there may be significant displacement along a coordinate that impacts a radiative transition, but does not affect nonradiative decay. See ref 22. We hypothesize that this is the case with our system.
  • 29
    • 0142042830 scopus 로고    scopus 로고
    • Note that there is some disagreement in the field about the contribution of cumulenic structures to the excited state of phenylenethynylenes; see: Beeby, A, Findlay, K. S, Low, P. L, Marder, T. B, Matousek, P, Parker, A. W, Rutter, S. R, Towrie, M. Chem. Comm. 2003, 2406-2407
    • Note that there is some disagreement in the field about the contribution of cumulenic structures to the excited state of phenylenethynylenes; see: Beeby, A.; Findlay, K. S.; Low, P. L.; Marder, T. B.; Matousek, P.; Parker, A. W.; Rutter, S. R.; Towrie, M. Chem. Comm. 2003, 2406-2407.
  • 32
    • 34447556728 scopus 로고    scopus 로고
    • We have also considered and eliminated the possibility of aggregation; there is no evidence of concentration effects in the luminescence experiments, and no aggregation observed in the NMR, which is measured at a concentration several orders of magnitude above that used in the spectroscopy experiments. Formation of transient aggregates in the form of excimers is eliminated due to the absence of a rise time in the time-resolved experiments
    • We have also considered and eliminated the possibility of aggregation; there is no evidence of concentration effects in the luminescence experiments, and no aggregation observed in the NMR, which is measured at a concentration several orders of magnitude above that used in the spectroscopy experiments. Formation of transient aggregates in the form of excimers is eliminated due to the absence of a rise time in the time-resolved experiments.
  • 33
    • 20644435559 scopus 로고    scopus 로고
    • Of course, in the ground state, there is a very low barrier to rotation about the -C≡C- unit; see: Miljanić, O. S, Han, S, Holmes, D, Schaller, G. R, Volhardt, K. P. C. Chem. Commun. 2005, 2606-2608 and references therein. This is not the case in the excited state
    • Of course, in the ground state, there is a very low barrier to rotation about the -C≡C- unit; see: Miljanić, O. S.; Han, S.; Holmes, D.; Schaller, G. R.; Volhardt, K. P. C. Chem. Commun. 2005, 2606-2608 and references therein. This is not the case in the excited state.
  • 34
    • 34447579976 scopus 로고    scopus 로고
    • This is apparent from the excited state energies, lifetimes, and the fact that these states are populated with close to unit quantum efficiencies as judged from singlet dioxygen sensitization; B. Hernandez; M. Selke, unpublished results
    • This is apparent from the excited state energies, lifetimes, and the fact that these states are populated with close to unit quantum efficiencies as judged from singlet dioxygen sensitization; B. Hernandez; M. Selke, unpublished results.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.