Liu Bei, Xu Yan, Bao Song-Song, Huang Xin-Da, Liu Min, Zheng Li-Min
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210023, P. R. China.
Inorg Chem. 2016 Oct 3;55(19):9521-9523. doi: 10.1021/acs.inorgchem.6b01854. Epub 2016 Sep 16.
By using an achiral (4-carboxynaphthalen-1-yl)phosphonic acid (4-cnappH), compound Co(4-cnapp)(OH)(HO) (1) is isolated crystallizing in orthorhomibic space group P222. It shows a three-dimensional framework structure in which the Δ-type chains of corner-sharing Co(μ-OH) triangles are cross-linked by the organic groups of the phosphonate ligands. Interestingly, the bulk sample of compound 1 is enantioenriched, thus providing a rare example of symmetry breaking upon crystallization from achiral starting materials. Slow magnetization relaxation is observed at low temperature.
通过使用非手性的（4-羧基萘-1-基）膦酸（4-cnappH），分离得到了化合物Co(4-cnapp)(OH)(HO)（1），其结晶于正交空间群P222。它呈现出三维骨架结构，其中由角共享Co(μ-OH)三角形构成的Δ型链通过膦酸酯配体的有机基团交联。有趣的是，化合物1的块状样品是对映体富集的，因此提供了一个从非手性起始原料结晶时对称性破缺的罕见例子。在低温下观察到缓慢的磁化弛豫。
