ICCAS OpenIR
UV-induced self-assembly of the inclusion complexes formed between a long-chain photochromic spiropyran and cyclodextrins
Sui, Q; Zhou, JW; He, W; Li, ZJ; Wang, YQ
1999-04-01
Source PublicationSCIENCE IN CHINA SERIES B-CHEMISTRY
ISSN1006-9291
Volume42Issue:2Pages:113-120
AbstractPhotochromic spiropyran with a long chain alkyl substitute can form axial complexes with alpha-, beta-, and gamma-cyclodextrin, respectively. The complexes show normal photochromism. The novel property of the colored forms of the inclusion complexes is that they can assemble into dimers at relatively low concentration or J-aggregates at relatively high concentration. For alpha-, beta-, and gamma-cyclodextrin, gamma(max) of the J-aggregates appear at 700 650, and 630 nm, respectively. The sizes of the cavities of cyclodextrins have very little effect on the spectra and decoloration kinetics of the dimers, but have great effects on the spectra of the J-aggregates. Unlike the charge transfer complex of Krongauz, the decoloration process of the dimers or J-aggregates cannot be described by an exponential or a two-exponential kinetics, but obey half-order kinetics very well. Another result that can be deduced from the kinetic analysis is that unlike the dimers formed in apolar solvents or in polymers, which consist of a colored molecule (B') and a colorless molecule (A') with a composition of A'B', in the present system, the dimer of the inclusion complex consists of two colored molecules (B). All these results can be interpreted by the proposed structure model and decoloration mechanism.
KeywordUv-induced Self-assembly Photochromism Spiropyran Cyclodextrin Inclusion Complex
Indexed BySCI
Language英语
WOS IDWOS:000080130100001
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/75214
Collection中国科学院化学研究所
Corresponding AuthorSui, Q
Affiliation1.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
2.NW Univ Xian, Dept Chem, Xian 710069, Peoples R China
Recommended Citation
GB/T 7714
Sui, Q,Zhou, JW,He, W,et al. UV-induced self-assembly of the inclusion complexes formed between a long-chain photochromic spiropyran and cyclodextrins[J]. SCIENCE IN CHINA SERIES B-CHEMISTRY,1999,42(2):113-120.
APA Sui, Q,Zhou, JW,He, W,Li, ZJ,&Wang, YQ.(1999).UV-induced self-assembly of the inclusion complexes formed between a long-chain photochromic spiropyran and cyclodextrins.SCIENCE IN CHINA SERIES B-CHEMISTRY,42(2),113-120.
MLA Sui, Q,et al."UV-induced self-assembly of the inclusion complexes formed between a long-chain photochromic spiropyran and cyclodextrins".SCIENCE IN CHINA SERIES B-CHEMISTRY 42.2(1999):113-120.
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