Synthesis of 2,7,12,17-tetraaryl-3,8,13,18-tetranitroporphyrins; electronic effects on aggregation properties of porphyrins
作者:Noboru Ono、Emiko Muratani、Yumiko Fumoto、Takuji Ogawa、Kunihiko Tazima
DOI:10.1039/a805471a
日期:——
(K = 900–1300 dm3 mol–1). The extent of aggregation decreases in the following order: porphyrin 4a (nitro and 4-methoxyphenyl substituents) > 4b (nitro and phenyl substituents) > TMTP (methyl and phenyl substituents) > OEP (ethyl substituents). EPR spectra of Cu–4a support the dimer structure of 4a, and the distance between two porphyrins is estimated to be about 4 Å.
通过2-羟基甲基-3-芳基-4-硝基吡咯的四聚反应制备在β-位被芳基和硝基取代基取代的新型卟啉。通过紫外可见光谱,1 H-NMR和EPR光谱研究了这些卟啉的聚集性质。发现用4-甲氧基苯基和硝基取代的卟啉4a在溶液中形成了牢固的界面聚集体(K = 900–1300 dm 3 mol –1)。聚集程度按以下顺序降低:卟啉4a(硝基和4-甲氧基苯基取代基)> 4b(硝基和苯基取代基)> TMTP(甲基和苯基取代基)> OEP(乙基取代基)。Cu–4a的EPR光谱支持4a的二聚体结构,并且两个卟啉之间的距离估计约为4Å。