聚（酰胺胺）树枝状大分子与碘形成的电荷转移络合物的紫外可见光谱、红外光谱及热学研究
UV-vis, IR spectra and thermal studies of charge transfer complex formed between poly(amidoamine) dendrimers and iodine.
作者信息
Refat Moamen S, El-Didamony Akram M, Grabchev Ivo
机构信息
Chemistry Department, Port Said, Suez Canal University, Egypt.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2007 May;67(1):58-65. doi: 10.1016/j.saa.2006.06.035. Epub 2006 Jul 4.
The intermolecular charge-transfer (CT) complexes formed between two poly(amidoamine) dendrimers (PAMAM) from zero (D1) and second generation (D2) as donor and iodine as sigma-acceptor have been studied spectrophotometrically in the chloroform medium. The suggested structures of the solid iodine charge-transfer complexes investigated by several techniques using elemental analysis, mid infrared spectra, and thermal analysis (TGA and DTG) of the solid CT-complexes along with the photometric titration curves for the reactions. The results indicate the formation of two CT-complexes [(D1)]-I(2) and [(D2)]-2I(2) with acceptor:donor molar ratios of 1:1 and 1:2, respectively. The kinetic parameters (non-isothermal method) for their decomposition have been evaluated by graphical methods using the equations of Horowitz-Metzger (HM) and Coats-Redfern (CR).
在氯仿介质中，通过分光光度法研究了零代（D1）和第二代（D2）聚（酰胺胺）树枝状大分子作为供体与碘作为σ受体之间形成的分子间电荷转移（CT）配合物。通过几种技术对固体碘电荷转移配合物的结构进行了研究，包括元素分析、中红外光谱以及固体CT配合物的热分析（TGA和DTG），同时还给出了反应的光度滴定曲线。结果表明形成了两种CT配合物[（D1）]-I₂和[（D2）]-2I₂，受体与供体的摩尔比分别为1:1和1:2。使用Horowitz-Metzger（HM）和Coats-Redfern（CR）方程，通过图形方法评估了它们分解的动力学参数（非等温方法）。
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