碘与安替比林在有机溶剂中电荷转移络合物的分光光度研究。
Spectrophotometric study of the charge-transfer complexes of iodine with antipyrine in organic solvents.
作者信息
Hasani Masoumeh, Rezaei Alireza
机构信息
Department of Chemistry, College of Science, Bu-Ali Sina University, Hamadan 65174, Iran.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2006 Dec;65(5):1093-7. doi: 10.1016/j.saa.2006.02.009. Epub 2006 Jul 5.
The charge-transfer complex formation of iodine with antipyrine has been studied spectrophotometrically in chloroform, dichloromethane (DCM) and 1,2-dichloroethane (DCE) solutions at 25 degrees C. The results indicate the formation of 1:1 charge-transfer complexes. The observed time dependence of the charge-transfer band and subsequent formation of I(3)(-) in solution were related to the slow transformation of the initially formed 1:1 antipyrine:I(2) outer complex to an inner electron donor-acceptor (EDA) complex, followed by fast reaction of the inner complex with iodine to form a triiodide ion. The values of the equilibrium constant, K, are calculated for each complex and the influence of the solvent properties on the formation of EDA complexes and the rates of subsequent reaction is evaluated.
在25摄氏度下，采用分光光度法研究了碘与安替比林在氯仿、二氯甲烷（DCM）和1,2 - 二氯乙烷（DCE）溶液中电荷转移络合物的形成。结果表明形成了1:1的电荷转移络合物。观察到的电荷转移带的时间依赖性以及溶液中随后I₃⁻的形成与最初形成的1:1安替比林:I₂外层络合物缓慢转化为内层电子供体 - 受体（EDA）络合物有关，随后内层络合物与碘快速反应形成三碘离子。计算了每种络合物的平衡常数K值，并评估了溶剂性质对EDA络合物形成及后续反应速率的影响。
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