钴卟啉对三种胺的固定用于SO2的脱除

利用紫外-可见光谱和荧光光谱手段研究了四苯基卟啉钴（CoTPP）对苯胺、乙二胺和二乙胺的超分子固定用于脱除SO2. 紫外-可见光谱表明CoTPP与三种胺作用后生成CoTPP-胺配合物，Soret吸收带发生红移. 当通入SO2后，SO2与胺的作用强于CoTPP与胺的作用，CoTPP-胺配合物释放出CoTPP，CoTPP 在胺法脱硫过程中起到胺固定作用. 荧光光谱表明CoTPP与三种胺作用形成1：1的分子配合物，且为熵驱动反应. CoTPP与苯胺和二乙胺作用为吸热反应，CoTPP与乙二胺作用为放热反应.

Supramolecular Fixation of Three Amines using Cobalt Tetraphenyl- porphyrin for SO2 Removal

In this work, supramolecular fixation of three amines, including aniline, ethylenediamine, and diethylamine, using cobalt tetraphenylporphyrin （CoTPP） for SO2 removal was studied using UV-Vis and fluorescence measurements. The UV-Vis spectra showed that increasing amines concentrations resulted in bathochromic shift for CoTPP Soret absorption band （B band）. Once SO2 was introduced, it competed with CoTPP for aniline, ethylenediamine, and diethylamine, which eventually led to the release of CoTPP and the change of solution colour/absorption band. After that, the CoTPP was regenerated and got back to the first state. The fluorescence spectra offered that CoTPP interacted with aniline, ethylenediamine, and diethylamine to form 1：1 molecular adducts. The interactions of CoTPP with aniline, ethylenediamine, and diethylamine were entropy-driven. The interaction of CoTPP with aniline and diethylamine was endothermic, and that with ethylenediamine was exothermic. Ethylenediamine presented a stronger binding constant value for CoTPP, so it was considered as a potential agent for SO2 removal.