聚酯聚醚嵌段共聚物与1,4-二咔唑环丁烷在激发态及基态的相互作用

<正> 聚酯聚醚嵌段共聚物具有十分良好的物理和机械性能,能加工成橡胶、纤维、塑料胶粘剂等,近年来也有作为医用高分子材料的报道。所以对聚酯聚醚嵌段共聚物的研究十分活跃。然而,有关其光物理性质的研究还很少见。本文报道了混合聚醚-聚酯嵌段共聚物(MPEE)与反式1,4-二咔唑环丁烷(1,4-DCC)在激发态和基态下的相互络合作用。结果表明,MPEE可以猝灭1,4-DCC的荧光,同时形成激基复合物。在分散

THE INTERACTION OF MIXED POLYETHER POLYESTER BLOCKCOPOLYMER AND 1,4-DICARBAZYLCYCLOB-UTANE IN THE EXCITED STATE AND THE GROUND STATE

The interaction of mixed polyether polyester blockcopolymer (MPEE) and 1,4-dicarbaz-ylcyclobutane (1, 4-DCC) in the excited state and the ground state has been studied by measurement of fluorescence spectra. The results show that the fluorescence spectrum of 1,4-DCC was quenched by MPEE by formation of exciplex in chloroform solution. The quenching effect is folowing Stern-Volmer equation. Kq is obtained (7.0 ×10⁹mol^-1s^-1) from S-V plot and r value of 1,4-DCC. Not only the monomer band of 1,4-DCC but also the exciplex hand of 1,4-DCC and MPEE were observed in the film of MPEE in which 1,4-DCC was dispersed. The co-mplexation of 1,4-DCC and MPEE in the ground state was proved by the appearance of long wavelength band in excitation spectrum. Analogously the quenching effect of dimethyl tereph-thalate (DMTP) and ethyleneglycal-p-phthalate (EGP) which is used as a model compound of hard segment of MPEE has been studied too. Furthermore. 1,4-DCC could be used as a flu-orescence probe molecule of MPEE. The structure and morphlogy of MPEE could be studi-ed by fluorescence technique.