Energetics and Structural Consequences of Axial Ligand Coordination in Nonplanar Nickel Porphyrins
作者:Yujiang Song、Raid E. Haddad、Song-Ling Jia、Saphon Hok、Marilyn M. Olmstead、Daniel J. Nurco、Neal E. Schore、Jun Zhang、Jian-Guo Ma、Kevin M. Smith、Stéphanie Gazeau、Jacques Pécaut、Jean-Claude Marchon、Craig J. Medforth、John A. Shelnutt
DOI:10.1021/ja045309n
日期:2005.2.1
decrease in the binding constant for addition of the first axial ligand; ligandbinding is completely inhibited for the more nonplanar porphyrins. The lowered affinity, resulting from the large energies required to expand the core and flatten the porphyrin to accommodate the large high-spin nickel(II) ion, has implications for nickel porphyrin-based molecular devices and the function of heme proteins
已经使用紫外-可见吸收光谱、共振拉曼光谱、X 射线晶体学、经典分子力学计算和法向坐标研究了褶皱对一系列镍 (II) 四(烷基)卟啉的轴向连接性能的影响结构分解分析。对于适度的非平面卟啉,发现卟啉褶皱会导致对吡咯烷和哌啶的结合亲和力降低,这主要是由于添加第一个轴向配体的结合常数降低所致;对于更多的非平面卟啉,配体结合被完全抑制。降低亲和力,这是由于扩大核心和扁平卟啉以容纳大的高自旋镍 (II) 离子所需的大能量导致的,
Coplanar conjugated β-nitroporphyrins and some aspects of nitration of porphyrins with N2O4
作者:Olivier Siri、Laurent Jaquinod、Kevin M Smith
DOI:10.1016/s0040-4039(00)00468-8
日期:2000.5
Sterically controlled N2O4 nitration of a meso-2,3-unsubstituted porphyrin or a bis-α-unsubstituted pyrroloporphyrin affords coplanar conjugated β-nitroporphyrins displaying strong electronic interactions.
内消旋-2,3-未取代的卟啉或双-α-未取代的吡咯卟啉的立体控制的N 2 O 4硝化作用提供了共面共轭的β-硝基卟啉,显示出很强的电子相互作用。
Facile syntheses of tetraalkylchlorin and tetraalkylporphyrin complexes and comparison of the structures of the tetramethylchlorin and tetramethylporphyrin complexes of nickel(II)
作者:Abraham Ulman、Judith Gallucci、Diane Fisher、James A. Ibers
DOI:10.1021/ja00542a034
日期:1980.10
Near-IR absorption of porphyrin methylcarbocations
作者:Yang Xu、Laurent Jaquinod、Anura Wickramasinghe、Kevin M. Smith
DOI:10.1016/j.tetlet.2003.08.090
日期:2003.10
Syntheses of stabilized meso-and beta-carbocations of nickel(II) porphyrins are reported and compared. A novel dimeric porphyrin cation absorbing at 1030 nm is also described. (C) 2003 Elsevier Ltd. All rights reserved.