Preparation and Characterization of Chromophores Pillared Zn-Al-LDH

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.