Porphyrazines with annulated diazepine rings. 5. Near-IR-absorbing tetrakis(6,7-dihydro-1<i>H</i>-1,4-diazepino)porphyrazines and effects of acid solvation on their spectral properties
作者:Ivan A. Skvortsov、Alina M. Fazlyeva、Ilya A. Khodov、Pavel A. Stuzhin
DOI:10.1039/d0nj04388e
日期:——
TOF, 1H NMR, UV-Vis-spectroscopy and cyclic voltamperometry. The presence in the fused 6,7-dihydro-1H-1,4-diazepine rings of the electron acceptor imino and donor secondary amino groups leads to strong polarization of the π-chromophore and shifts the Q band maxima in the near IR region (710-740 nm for the MgII complexes, 750-770 nm for the metal free macrocycles). The NH-groups in the diazepine fragments
制备了新的近红外吸收卟啉-四(-(5,7,7-三甲基-6,7-二氢-1H-1,4-二氮杂庚醇)卟啉(Me12Dz4PAMgII和Me12Dz4PAH2)及其环己基衍生物(Cy8Dz4PAMgII和Cy8Dz4PAH2)通过在丁醇镁或锂的存在下,将相应的6,7-二氢-1H-1,4-二氮杂-2,3-二腈进行模板环四聚。使用IR,MALDI TOF,1 H NMR,UV-Vis光谱和循环伏安法对所得的大环化合物进行表征。电子受体亚氨基和供体仲氨基在稠合的6,7-二氢-1H-1,4-二氮杂环上的存在会导致π发色团的强烈极化并使Q带的最大值在近红外区移动( MgII配合物为710-740 nm,无金属大环化合物为750-770 nm。参与分子内电荷转移(ICT)的二氮杂fragments片段中的NH-基团强烈淬灭了荧光。分光光度滴定,1 H NMR测量和量子化学分子模型表明,亚氨基氮原子上发生的二氮