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bianlijing

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Helical Rods: MOF-74. This structure is based on coordinated carboxyl and hydroxy groups. Helical Zn-O-C rods of composition [O2Zn2](CO2)2 are constructed from 6-coordinated Zn(II) centers, where each Zn has three carboxyl groups: one bound as in mode A and the remaining two as in A′.In addition, two hydroxy groups are bound as doubly bridging. The remaining coordination site has a terminal DMF ligand. The rods consist of edge-sharing ZnO6 octahedra alternately opposite and next-neighbor to form either a 31(1为下标) or a 32(2为下标) helix. The rods are linked by the benzene units of the DHBDC to produce bnn parallel rod packing and one-dimensional channels of dimensions 10.3 *5.5 Å2(2为上标) in which terminal DMF molecules protrude and water guests reside. Considering just the carboxylate C atoms as points of extension,they form 31(1为下标) and 32(2为下标) helices that are linked as in net etb .

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bianlijing: 金币+15, 翻译EPI+1, ★★★★★最佳答案 2013-05-08 14:24:38
螺旋杆:MOF-74。这种结构是基于协调羧基和羟基。螺旋zn-o-c杆组成[ o2zn2 ](CO2)2是从基锌(II)中心的构建,其中每个锌三羧基:一为模式和剩下的两个在′。此外,两个羟基被绑定为双架桥。剩余的协调网站有一个终端二甲基甲酰胺配体。棒由ZnO6八面体的边缘共享交替相对的邻居形成一个31(1为下标)或32(2为下标)螺旋。杆的dhbdc苯单元连接成BNN平行杆包装,尺寸为10.3×5.5Å2一维通道(2为上标)中,终端的DMF分子和水突出客人居住。考虑到只是羧酸C原子点延伸,形成31(1为下标)和32(2为下标)螺旋连接在网络传输。
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