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论文类型：期刊论文

发表时间：2012-04-01

发表刊物：DYES AND PIGMENTS

收录刊物：SCIE、EI

卷号：93

期号：1-3

页面范围：1401-1407

ISSN号：0143-7208

关键字：Hemicyanine; Fluorescence enhancement; TICT; Cucurbit[6]uril; Supramolecular chemistry; Logic gate

摘要：About 270 times fluorescence enhancement was observed when the hemicyanine dye, trans-4-[4-(dimethylamino)styryl]-1-methylpyridinium iodide (DSMI), was included by cucurbit[61uril (CB[6]). The 1:1 stoichiometry of DSMI/CB[6] complex was determined through optical spectra and H-1 NMR measurement. The large fluorescence enhancement was achieved by prohibiting the twisted intramolecular charge transfer (TICT) process of DSMI inside the distorted cavity of CB[6], together with the ion-dipole interaction between DSMI and CB[6]. The distortion of the CB[6] cavity, being as the major reason for the great fluorescence enhancement, was further confirmed in the calculation results. A resettable and reconfigurable logic gate was also constructed with DSMI and CB[6] under different pH situations. This study lays a solid foundation for the design of molecular logic gates by a supramolecular interaction mode. 2011 Elsevier Ltd. All rights reserved.