双臂式苯并-15-冠-5的合成及其对金属离子的选择键合  

Synthesis and Selective Binding for Metal Ion of Double-armed Benzo-15-crown-5

作　　者：韩建荣[1] 张衡益[1] 刘育[1] 

机构地区：[1]南开大学化学系元素有机化学国家重点实验室,天津300071

出　　处：《高等学校化学学报》2005年第7期1273-1276,M005,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:90306009;20372038)资助

摘　　要：通过4,5-二溴甲基苯并-15-冠-5与2-萘酚和2-巯基苯并噻唑反应分别合成了两种新的双臂式苯并-15-冠-5(2和3),进而采用溶剂萃取的方法研究了它们与一些阳离子的键合行为.结果表明,冠醚2对碱金属钾离子和重金属铊离子表现出较高的选择性萃取能力,而冠醚3对重金属银离子表现出较高的选择性萃取能力.Two new double-armed benzo-15-crown-5(2 and 3) were synthesized by reaction of 4,5-bis-(bromomethyl)-benzo-15-crown-5 with 2-naphthol and 2-mercaptobenzothiazole, respectively, and characterized by elemental analysis, mass, IR, -{-}~1H NMR spectroscopies and X-ray diffraction, respectively. The crystal structure of compound 2 was reported as follows: Crown ether 2 crystallizes in the monoclinic system, space group P2_1 with cell parameters: a=1.262 2(9) nm, b=1.224 7(9) nm, c=2.016 0(16) nm, β=101.270(15)°. There is an intermolecular π-π interaction among layers along c axis in the crystal. The cation binding abilities and selectivities of them were evaluated by solvent extraction of aqueous metal picrates. The results obtaine indicated that crown ether 2 showed a high extractability and selectivity for potassium ion and thallium ion, while crown ether 3 displayed a high extractability and selectivity for silver ion.

关 键 词：双臂式冠醚 阳离子选择性 晶体结构 萃取 

分 类 号：O612[理学—无机化学]