新型双阳离子卟啉的聚集行为及超声诱导的转换

Aggregation behaviors of novel dicationic porphyrin and ultrasound-induced aggregation transformation

合成了一种新型水溶性双阳离子卟啉PP1,该化合物在结构上同时具有给电子和拉电子基团的分子识别位点.PP1在其自身浓度低于亚微摩尔/升的条件下就可以自发地形成J-聚集体,通过紫外光谱、共振光散射光谱和荧光光谱等手段表征,并测得了其临界聚集浓度.随着自身浓度进一步升高,PP1逐渐转向H-聚集体.另外,一定浓度下PP1的H-聚集能够被超声波诱导而转化为J-聚集.

A novel dicationic porphyrin derivative PP1 has been synthesized,with electron-withdrawing pyridium groups and electron-donating anisole groups crosswise located at its peripheral.Upon dissolving in water,it started to spontaneously form J-aggregates from the monomer with its concentration below sub-micromole,which was comprehensively demonstrated by UV-vis,resonance light scattering and fluorescence spectroscopy.The critical aggregation concentration value was also determined.While the concentration of it continued to increase,PP1 became to form H-aggregates.Furthermore,according the spectral results,ultrasound irradiation was imposed on certain concentration of PP1 solution,which could transform H-aggregates into J-aggregates.