Isostructural M
<sub>2</sub>
L
<sub>4</sub>
Molecular Capsules with Anthracene Shells: Synthesis, Crystal Structures, and Fluorescent Properties
作者:Zhiou Li、Norifumi Kishi、Kenji Yoza、Munetaka Akita、Michito Yoshizawa
DOI:10.1002/chem.201200155
日期:2012.7.2
from two MII ions (M=Zn, Cu, Pt, Pd, Ni, Co, and Mn) and four bent ligands with embedded anthracene fluorophores. X‐ray crystallographic analysis (for M=Zn, Cu, Ni, and Pd) confirmed the formation of closed‐shell structures in which the large interior cavities inside the molecular capsules (about 1 nm) were shielded by eight anthracene panels. Analysis of the ZnII and CuII structures showed the inclusion
一个由两个M II离子(M = Zn,Cu,Pt,Pd,Pd,Ni,Co和Mn)和四个带有嵌入式蒽荧光团的弯曲配体定量自组装的M 2 L 4分子胶囊的同构系列。X射线晶体学分析(对于M = Zn,Cu,Ni和Pd)证实形成了闭壳结构,其中分子胶囊内部的大内腔(约1 nm)被八个蒽板屏蔽。对Zn II和Cu II结构的分析表明,其中包含了一个不寻常的三元组客体簇。4的MeCN分子,一个水分子,和一个CF 3 SO 3 -离子位于腔体内。通过NMR光谱和MS(ESI-TOF)进行的全面表征表明,分子胶囊非常稳定并在溶液中持续存在。同构胶囊的荧光特性在很大程度上取决于金属种类的标识:Zn II胶囊发出强蓝色荧光,具有高量子产率(Φ = 0.8),与弱发射的Ni II和Mn II胶囊形成鲜明对比。以及完全非发射性的Pd II,Pt II和Co II胶囊。另一方面,Cu II胶囊表现出溶剂致变色