生色基团插层锌铝水滑石的制备和性质

Preparation and Characterization of Chromophores Pillared Zn-Al-LDH

以层状锌铝水滑石为主体,在乙二醇介质中,通过离子交换法,将一对具有给体-受体性质的生色团香豆素-3-甲酸(3-CCA)与9-蒽甲酸(9-ACA)共插入到层状锌铝水滑石层间,组装得到晶体结构良好的共插层类水滑石,且通过控制离子交换的时间、温度、客体投料比,可制得一系列具有不同摩尔比客体的共插层产物.产物采用XRD、IR、TG-DTA等测试技术进行结构表征,采用UV-Vis吸收光谱和荧光光谱研究其光谱特性.结果表明,给体-受体进入层间后,不仅客体与主体层板存在静电力和氢键相互作用,而且在限域空间内有利于客体之间的相互作用,从而产生了给体-受体间的能量转移过程.

A pair of chromophores with donor-acceptor properties, coumarin-3-carboxylic acid （3-CCA） and 9-anthracene carboxylic acid （9-ACA）, were intercalated into the layered double hydroxide （LDH）, [Zn0.66Al0.34（OH）2]（CO3） 0.17·0.33H2O by the method of ion-exchange procedures in ethylene glycol. The co-intercalation compounds with different molar ratios of donor to acceptor in the solid products were obtained by controlling ion-exchange time, temperature, and the molar ratio of donor to acceptor in the solution. The obtained co-intercalation compounds were characterized by X-ray diffraction, infrared and thermogravimetry techniques. The photochemical properties of the obtained compounds were studied by UV-Vis absorption and fluorescence spectroscopy. These results indicate that the pair of chromophores, 3-CCA and 9-ACA within the interlayer region of the host can give rise to energy transfer processes because of the characteristics of their excited states.