A dyad of porphyrin and N-confused porphyrin is synthesized for the first time, in which an efficient excitation energy transfer as well as enhancement of emission quantum yield induced by anion binding is observed.
α position of the N-confused pyrrole unit. As a result, hydrogen-bonded dimers are formed through the intermolecular hydrogen bonds between the lactam-like moieties. In contrast to the highly distorted structure of 2, N-fused homoporphyrin 3 contains a unique 5,5,5–tricyclic fused ring, and thus demonstrates a relatively coplanar conformation except one invertedpyrrole unit. Because of the different
在过去的几十年中,卟啉类似物因其独特的性质和在各个领域的潜在应用而受到越来越多的关注。在这项工作中,通过酸催化缩合反应和氧化制备了新型非共轭噻吩嵌入的N-稠合高卟啉1和2以及完全共轭的N-稠合高卟啉3。既1和2包括两个内消旋-SP 3个碳上原子。然而,它们对空气或常见的氧化剂不敏感。单晶 X 射线衍射分析表明2采用高度扭曲的船状构象,两个吡咯单元的 NH 部分朝外,一个 O 原子连接到N混淆的吡咯单元的 α 位置。结果,通过内酰胺类部分之间的分子间氢键形成氢键二聚体。与2的高度扭曲结构相反,N-稠合高卟啉3包含一个独特的 5,5,5-三环稠环,因此除了一个反向吡咯单元外,表现出相对共面的构象。由于不同的结构特征,3表现出与1和2不同的F -结合行为。
N-Confused Porphyrin-Bearing <i>m</i><i>eso</i>-Perfluorophenyl Groups: A Potential Agent That Forms Stable Square-Planar Complexes with Cu(II) and Ag(III)
N-Confused porphyrin (NCP) bearing pentafluorophenyl groups at meso-positions, which were obtained from N-confused dipyrromethane in ca. 20% yield, can form Cu(II) complex as well as Ag(III), Ni(II), and Pd(II) complexes. The square-planar structures of all these metal complexes were elucidated by X-ray single-crystal analyses.