Three novel tetrathiafulvalene-annulated metalloporphyrazines with electron-withdrawing pentoxycarbonyl groups at the periphery were synthesized via the cyclotetramerization of dipentyl 6,7-dicyanotetrathiafulvalen-2,3-dicarboxylate in the presence of corresponding metal salts ( Zn(OAc)2·2H2O , Cu(OAc)2·2H2O , and NiCl2 ) and in pentanol. Molecular structures were fully characterized by 1H NMR, FT-IR, UV-vis, MALDI-TOF mass spectra and elemental analysis. These newly synthesized macrocyclic dyes were sufficiently stable in air during the purification process and also in further experiments. Electron-withdrawing substituents reduced the ability of tetrathiafulvalene groups to form radical cations. Solution electrochemical data showed one reductive and three oxidative processes within a -2000 mV to +2200 mV potential window. The four couples observed were assigned to Pz -2/ Pz -3 (I), TTF +•/ TTF (II), TTF +2/ TTF +• (III) and Pz -1/ Pz -2 (IV).
在相应的
金属盐(Zn(OAc)2-2H2O、Cu(OAc)2-2H2O 和 NiCl2)存在下,通过 6,7-二
氰基四
硫杂
戊烯-2,3-二
甲酸二戊酯在
戊醇中的环四聚合反应,合成了三种新型四
硫杂
戊烯annulated
金属
卟啉,其外围具有抽电子戊氧羰基。分子结构通过 1H NMR、FT-IR、UV-vis、MALDI-TOF 质谱和元素分析得到了充分表征。这些新合成的大环
染料在纯化过程和进一步的实验中在空气中足够稳定。抽电子取代基降低了四
噻吩基团形成自由基阳离子的能力。溶液电
化学数据显示,在 -2000 mV 至 +2200 mV 电位窗口内有一个还原过程和三个氧化过程。观察到的四个偶联过程分别为 Pz -2/ Pz -3 (I)、
TTF +-/
TTF (II)、
TTF +2/
TTF +- (III) 和 Pz -1/ Pz -2 (IV)。