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Volumn 458, Issue 1-3, 2008, Pages 157-160

Singlet oxygen phosphorescence photosensitized in nano-aggregates of C60 buckminsterfullerene is insensitive to solvent and quenchers and strongly red-shifted indicating highly polarizable interior

Author keywords

[No Author keywords available]

Indexed keywords

CYTOTOXICITY; FULLERENES; ORGANIC SOLVENTS; PHOSPHORESCENCE; PHOTOSYNTHESIS; POLARIZATION;

EID: 44449087979     PISSN: 00092614     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.cplett.2008.04.085     Document Type: Article
Times cited : (24)

References (24)
  • 5
    • 44449135492 scopus 로고    scopus 로고
    • note
    • Notice a stronger than expected dependence of signal intensity on oxygen concentration between air and oxygen saturated solutions. This is due to the preloading of the nanoaggregate cavities with gasses during purging with limited subsequent gas exchange on the time scale of photochemical excitation and emission processes.
  • 7
    • 44449140959 scopus 로고    scopus 로고
    • note
    • The actual measured singlet oxygen lifetime depends on the purity and water content in a given solvent batch. Handling and storage of deuterium oxide may introduce water which shortens singlet oxygen lifetime. The lifetimes presented in the manuscript are actual measured values in the solvents we used, and not the values that can be observed in "dry" solvents.
  • 9
    • 44449125117 scopus 로고    scopus 로고
    • note
    • It should be also mentioned here that the lifetime of singlet of oxygen generated from the aggregate interior could have theoretically been dictated by the kinetics of a long-lived photosensitizer triplet rather than the actual singlet oxygen decay. However, such a possibility can be ruled out owing to the very strong steady-state phosphorescence that requires a long lifetime. Otherwise, to satisfy the intense singlet oxygen phosphorescence, k radiative would be too high to agree with the kr-polarizability dependence reported by Wessels and Rodgers.
  • 22
    • 44449142431 scopus 로고    scopus 로고
    • note
    • For oxygen trapped and excited inside diamond, singlet oxygen emission spectrum would be expected to be even more red-shifted than that in C60 nanoaggregates.
  • 23
    • 44449141396 scopus 로고    scopus 로고
    • note
    • Molecular dynamic modeling confirms that the cavity created by four C60 molecules can indeed accommodate an oxygen molecule.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.