15N solid-NMR and X-ray diffraction studies of N-confused porphyrins
15N solid-NMR and X-ray diffraction studies of N-confused porphyrins
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DOI：
10.1002/mrc.2066
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发表时间：
2007-12-01
影响因子：
2
通讯作者：
Furuta, Hiroyuki
中科院分区：
文献类型：
--
作者：
Fukuchi, Masashi;Takegoshi, K.;Furuta, Hiroyuki
利用N-15高分辨率固体核磁共振和x射线衍射技术，研究了n掺杂卟啉（NCP）的固体结构。由CH2Cl2/己烷结晶的n -混淆四聚卟啉（Tol）的ID -N-15魔角自旋（MAS）实验和二维偶极辅助旋转共振（DARR） N-15-N-15自旋交换实验表明，Tol是内3h型互变异构体，在单元胞中具有两种磁性不同的分子。此外，FSLG-2 (4) over bar2 H-1-N-15偶极重耦合核磁共振测量表明，没有快速的环翻转运动，这与x射线分析中的平面结构一致。Tol的平面性是由pi-pi堆叠和CH-pi相互作用造成的。版权所有(c) 2007约翰威利父子有限公司
Using N-15 high-resolution solid-state NMR and X-ray diffraction, the structure of N-confused porphyrin (NCP) in the solid state was studied. A ID N-15 magic angle spinning (MAS) experiment and a 2D dipolar assisted rotational resonance (DARR) N-15-N-15 spin exchange experiment of N-confused tetratolylporphyrin (Tol) crystallized from CH2Cl2/hexane indicate that Tol is the inner 3H-type tautomer and has two magnetically different molecules in the unit cell. Further, a FSLG-2 (4) over bar2 H-1-N-15 dipolar recoupling NMR measurement indicates no fast ring flipping motion which is consistent with the planar structure in the X-ray analysis. The planarity of Tol is ascribed to crystal packing enforced by pi-pi stacking and CH-pi interactions. Copyright (c) 2007 John Wiley & Sons, Ltd.