Novel Metal鈥揙rganic Framework Based on Cubic and Trisoctahedral Supermolecular Building Blocks: Topological Analysis and Photoluminescent Property

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• 作者：Xiaoliang Zhao ; Xiaoyang Wang ; Suna Wang ; Jianmin Dou ; Peipei Cui ; Zhen Chen ; Di Sun ; Xingpo Wang ; Daofeng Sun
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：June 6, 2012
• 年：2012
• 卷：12
• 期：6
• 页码：2736-2739
• 全文大小：289K
• 年卷期：v.12,no.6(June 6, 2012)
• ISSN：1528-7505

文摘

A novel supermolecular building blocks (SBBs) based metal鈥搊rganic framework (MOF), with formula [Zn₇(TMBHB)₂路2NO₃路5DMF路4CH₃CH₂OH路6H₂O]_n (SDU-1), was constructed from C₃-symmetric trimethyl substituted 3,3鈥?3鈥?5,5鈥?5鈥?benzene-1,3,5-triylhexabenzoic acid (H₆TMBHB). Notably, the SDU-1 consists of two kinds of rare secondary building units (SBUs), [Zn₂(COO)₃] and [Zn₂(COO)₄], which are linked by TMBHB to form cubic and trisoctahedral SBBs, respectively. TOPOS software analysis of SDU-1 indicates that two alternative simplifications based on different SBBs can produce (3,24)-connected rht or (4,12)-connected ftw topologies. Compared with a recently reported Zn-BHB (H₆BHB = 3,3鈥?3鈥?5,5鈥?5鈥?benzene-1,3,5-triylhexabenzoic acid) MOF, the structural dissimilarity between them was caused by the steric hindrance of three methyl groups, which makes three isophthalate units on TMBHB nearly perpendicular to the central phenyl ring, giving TMBHB a nonplanar conformation. The photoluminescence behavior of SDU-1 was also discussed.