A CdSO4-Type 3D Metal–Organic Framework Showing Coordination Dynamics on Cu2+ Axial Sites: Vapochromic Response and Guest Sorption Selectivity
A CdSO4-Type 3D Metal–Organic Framework Showing Coordination Dynamics on Cu2+ Axial Sites: Vapochromic Response and Guest Sorption Selectivity
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DOI：
10.1021/cg3017563
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发表时间：
2013-03
影响因子：
3.8
通讯作者：
Guobi Li;Lei Li;Jun‐Min Liu;Tao Yang;C. Su
中科院分区：
文献类型：
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作者：
Guobi Li;Lei Li;Jun‐Min Liu;Tao Yang;C. Su
合成了一种独特的双层互穿CdSO_4配位网络{[Cu_2（4-pmpmd）_2（CH_3OH）_4（opd）_2]·2 H_2 O}_n [4-pmpmd = N，N′-双（4-吡啶甲基）苯基二亚胺; opd =邻苯二甲酸]，并通过红外光谱、热重分析、元素分析、单晶和粉末X射线衍射等方法对其进行了表征.金属-有机框架（MOF）在单晶到单晶（SC-SC）过程中表现出可逆的脱水和再水化。此外，脱水的材料，具有配位不饱和的Cu 2+网站，可以封装CH 3 OH分子的颜色变化，再次在一个可逆的SC-SC的方式，并显示选择性吸附CO2超过N2和H2。这种由小羟基分子的存在引起的明显颜色变化的特征对于通过简单的传感机制检测羟基分子是非常有希望的。此外，MOF选择性地与羟基客体相互作用，并显示出对水、甲醇、乙醇和水的吸附选择性。
A unique 2-fold interpenetrated CdSO4 coordination network of the formula {[Cu2(4-pmpmd)2(CH3OH)4(opd)2]·2H2O}n [4-pmpmd = N,N′-bis(4-pyridylmethyl)phenyldiimide; opd = o-phthalic acid] has been synthesized and characterized by IR spectra, thermogravimetric (TG) analyses, elemental analyses, and single crystal and powder X-ray diffraction methods. The metal–organic framework (MOF) exhibits reversible dehydration and rehydration in a single-crystal-to-single-crystal (SC–SC) process. Moreover, the dehydrated material, having coordinatively unsaturated Cu2+ sites, can encapsulate CH3OH molecules with a color change, again in a reversible SC–SC fashion, and shows selective adsorption of CO2 over N2 and H2. This feature of obvious color variation induced by the presence of small hydroxylic molecules is highly promising for detecting hydroxylic molecules through a simple sensing mechanism. In addition, the MOF selectively interacts with hydroxylic guests and shows sorption selectivity for water, methanol, ethan...