Synthesis and characterization of porphyrins bearing four redox-active phenylenediamine pendant groups as a dimensionally oriented π-conjugated system
摘要:
Porphyrins bearing phenylenediamine pendant groups were synthesized to afford dimensionally oriented pi-conjugated systems. The structural and electronic characteristics depend on the alphaalphaalphaalpha and alphabetaalphabeta atropisomers. In the fluorescence emission spectra, the emission from the porphyrin moiety was almost completely quenched. Zinc complexation of the alphaalphaalphaalpha isomer with zinc(II) acetate led to the corresponding zinc complex. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis and characterization of porphyrins bearing four redox-active phenylenediamine pendant groups as a dimensionally oriented π-conjugated system
摘要:
Porphyrins bearing phenylenediamine pendant groups were synthesized to afford dimensionally oriented pi-conjugated systems. The structural and electronic characteristics depend on the alphaalphaalphaalpha and alphabetaalphabeta atropisomers. In the fluorescence emission spectra, the emission from the porphyrin moiety was almost completely quenched. Zinc complexation of the alphaalphaalphaalpha isomer with zinc(II) acetate led to the corresponding zinc complex. (C) 2002 Elsevier Science Ltd. All rights reserved.
Calix[4]arenes Bearing Four Redox-Active π-Conjugated Pendant Groups for a Dimensionally Oriented Redox System
作者:Kaori Saito、Toshikazu Hirao
DOI:10.1246/bcsj.75.1845
日期:2002.8
A p-t-butylcalix[4]arene bearing four redox-active phenylenediamine pendant groups on the lower rim was synthesized and characterized spectroscopically and electrochemically. The interconversion of the oxidation states of the pendant groups was demonstrated both chemically and electrochemically.
Ruthenium complexes bearing π-conjugated pendant moieties for a redox-switching system
作者:Toshikazu Hirao、Koichiro Iida
DOI:10.1039/b010039k
日期:——
A ruthenium(II) complex bearing
N,Nâ²-bis(4-aminophenyl)-1,4-phenylenediamine moieties, which
can be chemically oxidized to the corresponding
N,Nâ²-bis(4-aminophenyl)-1,4-benzoquinonediimine moieties,
was synthesized, characterized electrochemically and photochemically, and
found to afford a redox-switching system.
A three-dimensionally oriented π-conjugated system; synthesis and characterization of porphyrins bearing π-conjugated pendant strands
作者:Toshikazu Hirao、Kaori Saito
DOI:10.1016/s0040-4039(99)02305-9
日期:2000.2
the meso-position of the porphyrin scaffold. The atropisomers (αααα and αβαβ) were isolated and spectroscopically characterized. The 1H NMR and UV–vis spectra revealed that the strands of the αβαβ-isomer might be in equilibrium with the conformers, in which one or more strands lean toward the porphyrin ring. In the fluorescence emission spectra, the emission from the porphyrin moiety was almost completely
通过在卟啉支架的介孔位置引入四条苯胺三聚体侧链,构建了三维取向的π共轭体系。分离出阻转异构体(αααα和αβαβ)并进行光谱表征。的1 H NMR和UV-vis光谱显示,αβαβ异构体的股线可以是在平衡与构象异构体,其中一个或多个绳股朝向卟啉环倾斜。在荧光发射光谱中,卟啉部分的发射在αααα-和αβαβ-阻转异构体中几乎被完全淬灭。