Chen Ying Pin, Liu Tian Fu, Fordham Stephen, Zhou Hong Cai
Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
Department of Chemistry, Texas A&M University, College Station, Texas 77842, USA.
Acta Crystallogr B Struct Sci Cryst Eng Mater. 2015 Dec 1;71(Pt 6):613-8. doi: 10.1107/S205252061501584X. Epub 2015 Nov 7.
Two metal-organic frameworks [PCN-426(Ni) and PCN-427(Cu)] have been designed and synthesized to investigate the structure predictability using a SBB (supermolecular building blocks) approach. Tetratopic ligands featuring 120° angular carboxylate moieties were coordinated with a [Ni3(μ3-O)] cluster and a [Cu2O2] unit, respectively. As topologically predicted, 4-connected networks with square coordination adopted the nbo net for the Ni-MOF and ssb net for the Cu-MOF. PCN-426(Ni) was augmented with 12-connected octahedral SBBs, while PCN-427(Cu) was constructed with tetragonal open channels. After a CO2 supercritical drying procedure, the PCN-426(Ni) possessed a Brunauer-Emmett-Teller (BET) surface area as high as 3935 m(2) g(-1) and impressively high N2 uptake of 1500 cm(3) g(-1). This work demonstrates the generalization of the SBB strategy, finding an alternative to inconvenient synthetic processes to achieve the desired structural features.
设计并合成了两种金属有机框架材料[PCN - 426(Ni)和PCN - 427(Cu)]，以使用超分子构筑块（SBB）方法研究结构可预测性。具有120°角羧酸根基团的四齿配体分别与[Ni3(μ3 - O)]簇和[Cu2O2]单元配位。如拓扑预测的那样，具有方形配位的4连接网络，对于镍基金属有机框架采用nbo网，对于铜基金属有机框架采用ssb网。PCN - 426(Ni)用12连接的八面体SBBs进行了增强，而PCN - 427(Cu)则构建有四方开放通道。经过二氧化碳超临界干燥程序后，PCN - 426(Ni)具有高达3935 m(2) g(-1)的布鲁诺尔-埃米特-泰勒（BET）表面积以及令人印象深刻的1500 cm(3) g(-1)的高氮气吸附量。这项工作证明了SBB策略的通用性，找到了一种替代不便合成过程以实现所需结构特征的方法。
