New porous coordination polymers based on expanded pyridyl-dicarboxylate ligands and a paddle-wheel cluster
New porous coordination polymers based on expanded pyridyl-dicarboxylate ligands and a paddle-wheel cluster
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DOI：
10.1039/c3ce42219d
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发表时间：
2014-01-01
期刊：
影响因子：
3.1
通讯作者：
Chen, Xiao-Ming
中科院分区：
文献类型：
--
作者：
Wei, Yong-Sheng;Lin, Rui-Biao;Chen, Xiao-Ming
Cu（NO3）（2）与4，4 '-（[3，4 '-联吡啶]-2'，6 '-二基）二苯甲酸（H（2）L1），3，3'-（[4，4 '-联吡啶]-2，6-二基）二苯甲酸（H（2）L2），或4，4'-联吡啶（[4，4 '-联吡啶]-2，6-二基）二苯甲酸（H（2）L3）合成了三种新的金属羧酸盐骨架（MCF-28、MCF-29和MCF-30），具有共同的式[Cu-2（L）（2）]（H2 L =吡啶基二羧酸）。X射线晶体学分析表明，MCF-28、MCF-29和MCF-30分别是三维（3，6）-连接的rtl、eea和pyr网络，基于3-连接的三足配体和6-连接的Cu-2（RCOO）（4）（py）（2）单元（RCOO和py分别表示羧酸根和吡啶基）。热重分析，粉末X-射线衍射和气体吸附测量表明，三个化合物成为收缩和无定形结构后，客户删除。有趣的是，单晶X射线衍射显示MCF-28表现出剧烈的温度诱导的骨架呼吸。
Solvothermal reactions of Cu(NO3)(2) and 4,4'-([3,4'-bipyridine]-2',6'-diyl)dibenzoic acid (H(2)L1), 3,3'-([4,4'-bipyridine]-2,6-diyl)dibenzoic acid (H(2)L2), or 4,4'-([4,4'-bipyridine]-2,6-diyl)dibenzoic acid (H(2)L3) yielded three new metal-carboxylate frameworks (MCF-28, MCF-29 and MCF-30) with a common formula [Cu-2(L)(2)] (H2L = pyridyldicarboxylic acid). X-ray crystallography showed that MCF-28, MCF-29, and MCF-30 are three-dimensional (3,6)-connected rtl, eea and pyr networks, respectively, based on 3-connected tripodal ligands and 6-connected Cu-2(RCOO)(4)(py)(2) units (RCOO and py denote carboxylate and pyridyl groups, respectively). Thermogravimetry, powder X-ray diffraction, and gas adsorption measurements indicated that the three compounds became shrunk and amorphous structures after guest removal. Interestingly, single-crystal X-ray diffraction showed that MCF-28 exhibited drastic temperature-induced framework breathing.