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Volumn 127, Issue 28, 2005, Pages 10083-10088

Conjugation enhancement of intramolecular exciton migration in poly(p-phenylene ethynylene)s

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL SENSORS; CONFORMATIONS; ENERGY TRANSFER; EXCITONS; FLUORESCENCE; LIQUID CRYSTAL POLYMERS; NEMATIC LIQUID CRYSTALS; PHOTOVOLTAIC EFFECTS;

EID: 22244451066     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja051936g     Document Type: Article
Times cited : (137)

References (42)
  • 4
  • 26
    • 32744463734 scopus 로고    scopus 로고
    • note
    • 1H NMR end-group analysis (∼23) and the value obtained from the GPC analysis (∼25), which are in excellent agreement with each other.
  • 27
    • 32744471419 scopus 로고    scopus 로고
    • note
    • We define the efficiency of energy transfer as a measure of the probability that an exciton formed on the PPE backbone is transmitted to the anthracenyl end group. It was estimated by comparing the emission spectrum of 1 to that of phenyl end-capped model polymer 5 at constant absorbance at the 370 nm excitation wavelength (see Supporting Information for more details).
  • 29
    • 0042842605 scopus 로고    scopus 로고
    • It was recently demonstrated that the iptycene-incorporating conjugated polymers, if used as dopants, are capable of increasing the order parameter of nematic LCs due to the same "internal free volume" minimization effect (Araoka, F.; Shin, K.-C.; Takanishi, Y.; Ishikawa, K.; Takezoe, H.; Zhu, Z.; Swager, T. M. J. Appl. Phys. 2003, 94, 279-283).
    • (2003) J. Appl. Phys. , vol.94 , pp. 279-283
    • Araoka, F.1    Shin, K.-C.2    Takanishi, Y.3    Ishikawa, K.4    Takezoe, H.5    Zhu, Z.6    Swager, T.M.7
  • 30
  • 41
    • 32744474432 scopus 로고    scopus 로고
    • note
    • Because of the much larger size of the polymer backbone compared to the size of the terminating group, the rate of (collisional) quenching of an exciton in the backbone is expected to be much higher. This may result in nonproportional quenching of the emission, with the backbone emission displaying greater quenching.
  • 42
    • 0003030535 scopus 로고
    • 2 for a one-dimensional array to l/c for a three-dimensional network, where c is the concentration of randomly distributed traps. We believe this statistical reasoning to be critical if not dominant in the enhancement of exciton migration efficiency in the three-dimensional network.
    • (1969) J. Phys. Soc. Jpn. , vol.26 , Issue.SUPPL. , pp. 6-10
    • Montroll, E.W.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.