【摘要】 研究四苯基卟啉(H2TPP)的二氯甲烷溶液在盐酸、硝酸、氢溴酸和硫酸条件下形成聚集体的电子吸收和拉曼光谱.结果表明,在盐酸、硝酸和氢溴酸条件下形成了H2TPP的J聚集体,在硫酸条件下形成了H2TPP的H和J聚集体,特征双峰818/834 cm-1和1 072/1 093cm-1体现了H和J聚集体振动频率的差别.通过分析硫酸条件下在甲苯和氯仿溶剂中分别形成聚集体的拉曼光谱可知,双质子化H2TPP在高溶解度溶液中有利于J聚集体的形成,而在低溶解度溶剂中有利于形成H和J聚集体.更多还原

【Abstract】 The effects of acids(HCl,H2SO4,HBr and HNO3) on meso-tetraphenylporphyrin(H2TPP) in dichloromethane solution were investigated by means of UV/Vis absorption combined with Raman scattering techniques,the electronic absorption spectrum shows the J-aggregate of H2TPP is formed in the presence of HCl,HBr or HNO3,but both of H-and J-aggregates are formed in the presence of H2SO4 characteristic double bands at 818/834 cm-1and 1 072/1 093 cm-1 represented the main vibrational frequency difference between H-and J-aggregates.Raman spectra of aggregate H2TPP in the presence H2SO4 in dichloromethane,toluene and chloroform solutions show the dependence of aggregation behavior on the nature of solvent.The conclusion is that H2TPP diacid has a tendency to form J-aggregate in high solubility solvents,but both H-and J-types of aggregates in the relative low solubility ones.更多还原