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首页> 外文期刊>RSC Advances >Metal–organic frameworks based on tri- and penta-nuclear manganese(ii) secondary building units self-assembled by a V-shaped silicon-containing dicarboxylate
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Metal–organic frameworks based on tri- and penta-nuclear manganese(ii) secondary building units self-assembled by a V-shaped silicon-containing dicarboxylate

机译：基于Tri-and核锰（II）的二级构建单元的金属有机框架由含V形含硅二羧酸盐自组装

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摘要

A bent V-shaped silicon-containing linker, bis( p -carboxyphenyl)diphenylsilane (H _(2) cpdps), has been used to synthesize two coordination polymers, [Mn _(5) (cpdps)(HCOO) _(2) (H _(2) O) _(2) (DMF) _(4) ]·6DMF ( 1 ) (DMF – dimethylformamide) and [Mn _(3) (μ-H _(2) O) _(2) (Hcpdps) _(2) (cpdps) _(2) (DMF) _(2) ]·2DMF·12H _(2) O ( 2 ). The crystal structure of both compounds was determined by single-crystal X-ray diffraction. In complex 1 , pentanuclear manganese( II ) secondary building units (SBUs) are held together by cpdps ~(2?) ligands to form a 2D (4,4) coordination polymer. Crystal 2 is built of trinuclear manganese( II ) SBUs that are held together by cpdps ~(2?) and Hcpdps ~(?) ligands within a 2D (4,4) coordination polymer. The magnetic susceptibility measurements revealed antiferromagnetic exchange interactions between the paramagnetic manganese( II ) ions (d ~(5) ). The exchange interactions are ranging between ?0.6 and ?2.25 cm ~(?1) . Thermal analysis consisting in simultaneous thermogravimetry and automated FTIR analysis of the evolved gases permitted to evaluate the stability of the compounds and identify the main processes underlying decomposition. The void volumes accessible for particular guest molecules (CO _(2) , H _(2) O, Ar, N _(2) ) were theoretical estimated on the basis of the crystallographic data. Water vapor sorption capacity was measured experimentally in dynamic regime at room temperature.
机译：已使用弯曲的V形含硅的接头，双（对羧基）二苯基硅烷（H _（2）Cpdps），用于合成两个配位聚合物[Mn _（5）（CPDP）（HCOO）_（2 ）（H _（2）O）_（2）（DMF）_（4）]·6dmf（1）（DMF - 二甲基甲酰胺）和[Mn _（3）（μ-H _（2）O）_（ 2）（HCPDP）_（2）（CPDP）_（2）（DMF）_（2）]·2DMF·12H _（2）O（2）。通过单晶X射线衍射测定两种化合物的晶体结构。在络合物1中，五核锰（II）二次建筑单元（SBUS）通过CPDPS〜（2？）配体在一起，形成2D（4,4）配位聚合物。晶体2由三核锰（II）SBUS构建，该SBUS通过CPDPS〜（2？）和2D（4,4）配位聚合物中的HCPDPS〜（α）配体保持在一起。磁化率测量揭示了顺磁锰（II）离子（D〜（5））之间的反铁磁体交换相互作用。交换相互作用在Δ0.6和？2.25cm〜（？1）之间进行范围。热分析在同时热重率和自动化FTIR分析中，允许评估化合物的稳定性并鉴定分解的主要过程。特定客观分子（CO _（2），H _（2）O，AR，N _（2））可访问的空隙体积是基于晶体数据估计的理论估计。在室温下实验测量水蒸气吸收能力。

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