Carbazole-containing light-emitting polymers: Properties of excited states
Lin, HZ; Zheng, M; Yang, JL; Bai, FL
AbstractA series of light-emitting conjugated polymers alternatively involving carbazole and bivinylene arylene moieties in the main chain were synthesized via Wittig-Horner type copolymerization. The photoinduced charge transfer process relating to these polymers was investigated by using the technique of fluorescence spectroscopy. The interaction between excited copolymers and C-60 in benzene solution was studied. The fluorescence quenching can be well described by the "sphere-of-action" mechanism. It is believed that two basic steps are involved in the quenching process, i.e. the diffusion of excitation within the conjugated polymers and the dissociation of the exetions trapped by fullerene. The radius of the sphere-of-action can be related to the excitation diffusion length, which depends on the lifetime of the exciton. The dynamic fluorescence quenching of the copolymers by another quencher, 1,4-dicyanobenzene (DCB) was also surveyed. Copolymers with different chain conformations show different temperature effects in the dynamic quenching. A planar conformation is beneficial for the quenching via bimolecular collision.
KeywordLight-emitting Conjugated Polymers Photoinduced Energy (Charge) Transfer Sphere-of-action Fluorescence Quenching Excitation Diffusion Temperature Effects
Indexed BySCI
WOS IDWOS:000182411500007
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorBai, FL
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Lab Organ Solids, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Lin, HZ,Zheng, M,Yang, JL,et al. Carbazole-containing light-emitting polymers: Properties of excited states[J]. CHINESE SCIENCE BULLETIN,2003,48(7):637-642.
APA Lin, HZ,Zheng, M,Yang, JL,&Bai, FL.(2003).Carbazole-containing light-emitting polymers: Properties of excited states.CHINESE SCIENCE BULLETIN,48(7),637-642.
MLA Lin, HZ,et al."Carbazole-containing light-emitting polymers: Properties of excited states".CHINESE SCIENCE BULLETIN 48.7(2003):637-642.
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