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Rare π5^6Pb Interactions in a Two-dimensional Rare Metal-organic Coordination Polymer with Two Distinct Kinds of Axially Chiral Units
作者姓名:陈新  张明星  黄坤林
作者单位:College of Chemistry, Chongqing Normal University
基金项目:This work was supported by Science and Technology Projects of Chongqhlg Municipal Education Commission (No. KJ 100602) and Chongqing Normal University Scientific Research Foundation Project (Nos. 10XLZ005 and 201 I XLS30)
摘    要:A new metal-organic coordination polymer [Pb(mfpdc)(CH3OH)]n (1, mfpdc=2,6-dimethyl-4-(2-furanyl) pyridine-3,5-dicarboxylate) was synthesized and characterized by single-crystal X-ray analyses. The crystal is orthorhombic, space group Pbca, a=15.6297(18), b=9.4803(11), c=18.598(2), V=2755.8(6)3 , Z=8, Mr=498.44, Dc=2.403 Mg/m3 , F(000)=1872, the final R=0.0275 and wR=0.0726 (I>2 (I)). There are interesting polynuclear zigzag (PbO5 ) n chains in the structure of 1, and there have interesting axially chiral S-and R-unit Pb4L units constructed from prochiral organic ligands through C-H···O bonding. The (R/S)-Pb4L units by sharing Pb centers generate a 2-D coordination network, in which there exist rare π65 ···Pb(3.2610 ) interactions. The solid-state photoluminescent emission of compound 1 appears at 487 nm.

关 键 词:axially chiral unit  coordination polymer  metal···π interaction  Pb  photoluminescence
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