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Defective Hierarchical Pore Engineering of a Zn–Ni MOF by Labile Coordination Bonding Modulation
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-03-26 , DOI: 10.1021/acs.inorgchem.1c00164 Hao-Jing Ding 1 , Ying Zhang 1 , Xi Wang 2 , Qiu-Ying Lin 1 , Shu-Ming Zhang 1 , Mei-Hui Yu 2 , Ze Chang 2, 3 , Xian-He Bu 2, 3, 4
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-03-26 , DOI: 10.1021/acs.inorgchem.1c00164 Hao-Jing Ding 1 , Ying Zhang 1 , Xi Wang 2 , Qiu-Ying Lin 1 , Shu-Ming Zhang 1 , Mei-Hui Yu 2 , Ze Chang 2, 3 , Xian-He Bu 2, 3, 4
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The construction and modulation of hierarchical pore structure in metal-organic frameworks (MOFs) has become a hot topic owing to the advantages of hierarchical pore MOFs (HP-MOFs) in matter storage and mass transfer related applications. Herein, we report the engineering of crystalline defect in a bimetallic MOF for the construction and tuning of HP-MOF. A microporous MOF system showing metal-center-dependent water stability, namely, {[M3F(bdc)3 tpt] (solvents)}n (M = Zn2+ and Ni2+, H2bdc = 1,4-benzenedicarboxylic acid, tpt = 2,4,6-tris(4-pyridyl)triazine), was utilized as a platform for the construction of HP-MOF. By tuning the Zn2+/Ni2+ ratio in the reactant, a bimetallic MOF with a highly tunable Zn2+/Ni2+ ratio could be obtained. The relatively labile Zn2+-based coordination bonding in the bimetallic MOF could be readily and targeted broken through water treatment for the engineering of crystalline defects-based hierarchical pore structure. The resultant HP-MOF reveals a dramatically increased pore volume with the presence of mesopore and macropore. In addition, the anionic framework of HP-MOF could be utilized for the selective adsorption of a cationic dye methylene blue, and a relatively high capacity (250 mg·g–1, five times compared with the pristine microporous MOF) could be achieved.
中文翻译：
Zn-Ni MOF不稳定配位键调制的分层层次孔工程
由于金属-有机骨架（HP-MOF）在物质存储和传质相关应用中的优势，金属-有机骨架（MOF）中的分层孔结构的构造和调节已成为热门话题。在这里，我们报告了双金属MOF中晶体缺陷的工程，用于HP-MOF的构建和调整。微孔MOF系统显示出与金属中心有关的水稳定性，即{[M 3 F（bdc）3 tpt]（溶剂）} n（M = Zn 2+和Ni 2 +，H 2 bdc = 1,4-苯二甲酸（tpt = 2,4,6-三（4-吡啶基）三嗪）被用作构建HP-MOF的平台。通过调整Zn 2+ / Ni 2+可以得到具有高度可调的Zn 2+ / Ni 2+比的双金属MOF 。双金属MOF中相对不稳定的基于Zn 2+的配位键可以很容易地通过水处理被破坏，从而用于基于晶体缺陷的分层孔结构工程。所得的HP-MOF在中孔和大孔的存在下显示出显着增加的孔体积。此外，HP-MOF的阴离子骨架可用于阳离子染料亚甲基蓝的选择性吸附，并具有相对较高的容量（250 mg·g –1，是原始微孔MOF的五倍）。
更新日期：2021-04-05
中文翻译：
Zn-Ni MOF不稳定配位键调制的分层层次孔工程
由于金属-有机骨架（HP-MOF）在物质存储和传质相关应用中的优势，金属-有机骨架（MOF）中的分层孔结构的构造和调节已成为热门话题。在这里，我们报告了双金属MOF中晶体缺陷的工程，用于HP-MOF的构建和调整。微孔MOF系统显示出与金属中心有关的水稳定性，即{[M 3 F（bdc）3 tpt]（溶剂）} n（M = Zn 2+和Ni 2 +，H 2 bdc = 1,4-苯二甲酸（tpt = 2,4,6-三（4-吡啶基）三嗪）被用作构建HP-MOF的平台。通过调整Zn 2+ / Ni 2+可以得到具有高度可调的Zn 2+ / Ni 2+比的双金属MOF 。双金属MOF中相对不稳定的基于Zn 2+的配位键可以很容易地通过水处理被破坏，从而用于基于晶体缺陷的分层孔结构工程。所得的HP-MOF在中孔和大孔的存在下显示出显着增加的孔体积。此外，HP-MOF的阴离子骨架可用于阳离子染料亚甲基蓝的选择性吸附，并具有相对较高的容量（250 mg·g –1，是原始微孔MOF的五倍）。
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