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外批类化合物具有光物理、光化学、生物化学和配位化学等多方面的特殊性质,并具有多种应用,尤其是可望在氢能源开发方面发挥重大作用,由此,近年来对叶琳化合物的研究方兴未艾,叶琳化合物的电子光谱表现Soret带和Q带是其基本特征,通常,金属叶琳的Soret带为很强的单峰,而 相似文献
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Beer's law experiment, variable-temperature spectral experiment of UV-Vis absorption, 1H NMR, and measurement of magnetic moment were conducted for NiTMPyP in aqueous solution. It was found that Beer's law was obeyed in concentration range 8× 10-7-2×10-5.mol•dm-3.With the temperature increasing from 0 ℃ to 95 ℃, the isosbestic point appeared at 435 nm and the lowest downfield 1H NMR peak narrowed gradually and shifted to upfield. The magnetic moment is 2.07 BM in D2O at 30 ℃, but in the D2O-CD3COCD3 mixed solvent there was no evidence for the existance of paramagnetic species. These results show that NiTMPyP exists in aqueous solution as an equilibrium mixture of diamagnetic, four-coordinate nickel (Ⅱ) and paramagnetic, sir-coordinate nickel (Ⅱ) complexed by water molecules in the axial position. The thermodynamic parameters of the axial-coordinated reaction were △S?=-178.6 J•K-1•mol-1, △G298K?=-1.6 kJ•mol-1. 相似文献
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meso—四(4—N—取代吡啶基)卟啉铜(Ⅱ)配事物的合成及其对O^—2的清除作用 总被引:1,自引:0,他引:1
以Cu2(OH)2CO3为原料通过对非均相金属插入反应合成meso-四(4-N-甲基吡啶基)卟啉合铜和meso-四(4-N-苄基吡啶基)卟啉合铜。方法操作方便产率高。研究表明,在核黄素光照产生O^-2的体系中,CuTMPyP和CuTBPyP对O^-2具有明显的清除作用,对人红细胞内血红蛋白具有一定保护作用。 相似文献
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研究了5种水溶性金属卟啉ZnTMAPP、ZnTMPyP、MgTMPyP、ZnTBPyP和ZnTTPS4的光物理(吸收光谱和荧光光谱、振子强度、荧光寿命、量子产率)、激发态氧化还原电势及光稳定性。结果表明MgTMPyP是比ZnTMPyP更好的光敏剂。 相似文献
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