Structure and Photophysical Properties of a Chiral 4-Fold Interpenetrated Zn(Ⅱ) Coordination Polymer Tuned by 4,4'-(Hexafluoroisopropylidene)bis(benzoic acid) and 1,3-Di(pyridineyl)benzene

A new three-dimensional(3D) chiral metal-organic coordination polymer, Zn(dpb)(hfipbb)]n, was obtained under hydrothermal conditions by 1,3-di(pyridineyl)benzene(dpb) and 4,4?-(Hexafluoroisopropylidene)bis(benzoic acid)(H_2hfipbb). The as-prepared sample was characterized by single-crystal X-ray diffraction, PXRD, elemental analysis, IR spectroscopy and TGA analysis. The title coordination polymer crystallizes in orthorhombic, space group P21212, with a=21.923(4), b=23.594(4), c=7.3042(13) ?, V=3778.1(12) ?~3, Dc=1.209 g/cm~3, Mr=687.90, F(000)=1328, μ=0.713 mm~(-1) and Z=4. The compound contains two types of helical chains Zn(hfipbb)]n and Zn(dpb)]n which are linked with each other to generate a 3D framework by sharing the same Zn(Ⅱ) cations. It displays a 4-fold interpenetrated 3D framework. In addition, the luminescence, fluorescence lifetime and the second harmonic generation(SHG) efficiency properties in the solid state have been studied.