作者:Yasuhide Inokuma、Atsuhiro Osuka
DOI:10.1002/chem.200900879
日期:2009.7.13
Capped subporphyrins 12–16 with C3 molecular symmetry were synthesized from 5,10,15‐tri(3‐aminophenyl)‐substituted subporphyrin 8 and tripodal trialdehydes 2–6 by Lindsey’s entropically favored macrocyclization. X‐ray diffraction analysis has revealed that the concave surface of the subporphyrin core is selectively capped with a 1,3,5‐substituted benzene moiety. Capped subporphyrins 15 and 16, with
封端subporphyrins 12 - 16与Ç 3分子的对称性从5,10,15-三(3-氨基苯基)合成取代的subporphyrin 8和三足三醛2 - 6由林赛的熵青睐大环化。X射线衍射分析表明,亚卟啉核的凹面被1,3,5-取代的苯部分选择性覆盖。带有五原子臂的加帽的亚卟啉15和16,因此具有较大的内腔,在其晶体结构中表现出溶剂掺入行为。另一方面,亚卟啉12和13表现出紧密的结构,其中帽和亚卟啉核心更接近,平均平面间距分别为3.56和3.15Å。变温1个1 H NMR测量结果表明,subporphyrins 12,13,和16经历之间螺旋互变P和中号取决于臂长形式和帽的电子性质。其中,亚卟啉13带有被三个原子臂束缚的1,3,5-三(烷氧基羰基)苯帽,其螺旋转变非常缓慢,且焓变大,ΔH ≠ = 76.4 kJ mol -1以及类似Soret波段的特征性红移和Q(0,0)波段的增强。这些