Solvent-Dependent Synthesis of Porous Anionic Uranyl-Organic Frameworks Featuring a Highly Symmetrical (3,4)-Connected ctn or bor Topology for Selective Dye Adsorption

详细信息    查看全文

• 作者：Dr. Kong-Qiu Hu ; Dr. Xiang Jiang ; Dr. Cong-Zhi Wang ; Dr. Lei Mei ; Zhen-Ni Xie ; Wu-Qing Tao ; Xiao-Lin Zhang ; Prof. Zhi-Fang Chai and Prof. Wei-Qun Shi
• 刊名：Chemistry - A European Journal
• 出版年：2017
• 出版时间：January 12, 2017
• 年：2017
• 卷：23
• 期：3
• 页码：529-532
• 全文大小：2328K
• ISSN：1521-3765

文摘

Two highly symmetrical (3,4)-connected uranyl–organic frameworks (UOFs) were synthesized by a judicious combination of D_3h-symmetrical triangular [UO₂(COO)₃]⁻ and T_d symmetrical tetrahedral tetrakis(4-carboxyphenyl)methane (H₄MTB). These two as-synthesized UOFs possess similar structural units and coordination modes but totally different topological structures, namely ctn net and bor net. Solvent-induced interpenetration and a morphology change are observed. The two compounds exhibit crystal transformation via a dissolution–crystallization process. Adsorption experiments in CH₃OH solution indicate that both of them can selectively remove positively charged dyes over negatively charged and neutral dyes. Moreover, the electronic structural and bonding properties of the two compounds were systematically explored by density functional theory (DFT) calculations.