Multifunctional Polythreading Coordination Polymers: Spontaneous Resolution, Nonlinear-Optic, and Ferroelectric Properties

作者：Duan, Xianying; Meng, Qingjin^*; Su, Yang; Li, Yizhi; Duan, Chunying; Ren, Xiaoming; Lu, Changsheng

来源：Chemistry - A European Journal, 2011, 17(36): 9936-9943.

DOI：10.1002/chem.201100185

• chiral resolution
• ferroelectric properties
• nonlinear optics
• polymers
• polythreading

The reactions of methylenediisophthalic acid (H4L) and N-auxiliary ligands (1,2-bis(4-pyridyl)ethylene, 1,2-bis(4-pyridyl) ethane) with transition-metal centers (Co2+/Mn2+) have given rise to four unprecedented polythreading coordination polymers. Single-crystal X-ray diffraction analyses revealed that the compounds can be described as 3D(2-)subset of 2[1D(2+)] + 2D(6-) for 1, 3D(4-)subset of 1D(2+) + 1D(6-) for 2, and 2D(4-)subset of 0D(2+) + 2[1D(3-)] for 3 and 4. All the polymers are formed through the assembly of two kinds of motifs with opposite charges. Noncentrosymmetric structures and multifunctionality in 2-4 are established by varying ligands and metal centers. Spontaneous resolution upon crystallization occurred in compounds 3 and 4 in the absence of any chiral source. The enantiomers of 3 and 4 consist of three chiral building blocks of L4-/HL3- and Mn2+ centers. In the solid state, polar compounds 2-4 exhibit nonlinear-optic (NLO) and ferroelectric properties at room temperature. The assembly of two kinds of motifs with opposite charges provides a useful method for the preparation of multifunctional compounds.

• 出版日期2011-8
• 单位南京大学; 南京工业大学; 大连理工大学