Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Soft Matter. 2016 Jun 28;12(24):5297-303. doi: 10.1039/c6sm00924g. Epub 2016 May 25.
The aggregation behavior of the ionic liquid (IL) 1-alkyl-3-methylimidazolium chloride with different alkyl chain lengths in a deep eutectic solvent (DES, composed of choline chloride and glycerol in a 1 : 2 mole ratio) was studied for the first time. The critical micellar concentration, micellar size and intermolecular interactions in IL/DES solutions were investigated by different techniques including the fluorescence probe technique, small angle X-ray scattering and Fourier transform infrared spectroscopy. The solvophobic effect dominates the micellization of CnmimCl in DES and the intermolecular hydrogen-bond interaction plays a positive role to promote micelle formation. The micellar solutions were utilized for the synthesis of the water-unstable metal-organic framework Cu3(BTC)2 (BTC = 1,3,5-benzenetricarboxylate) at room temperature. X-Ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption isotherms confirm the formation of crystalline Cu3(BTC)2 nanocrystals with mesoporous structures. The morphologies and porosity properties of Cu3(BTC)2 nanocrystals can be modulated by varying the concentration of CnmimCl.
首次研究了不同碳链长度的离子液体 1-烷基-3-甲基咪唑氯化物在深共熔溶剂（DES，由氯化胆碱和甘油以 1:2 的摩尔比组成）中的聚集行为。通过荧光探针技术、小角 X 射线散射和傅里叶变换红外光谱等不同技术研究了 IL/DES 溶液中的临界胶束浓度、胶束尺寸和分子间相互作用。溶剂化作用支配着 CnmimCl 在 DES 中的胶束化，分子间氢键相互作用对促进胶束形成起着积极的作用。胶束溶液被用于在室温下合成水不稳定的金属有机骨架 Cu3(BTC)2（BTC=1,3,5-苯三甲酸）。X 射线衍射、扫描电子显微镜、透射电子显微镜和氮气吸附-脱附等温线证实了具有介孔结构的结晶 Cu3(BTC)2 纳米晶体的形成。通过改变 CnmimCl 的浓度可以调节 Cu3(BTC)2 纳米晶体的形态和孔隙特性。
