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作 者:杜丞博[1] 王春玲[1] 冯素姣[1] 任远航[1] 孔祖萍[1] 岳斌[1] 贺鹤勇[1]
机构地区:[1]复旦大学化学系,上海市分子催化和功能材料重点实验室,上海200433
出 处:《高等学校化学学报》2011年第3期673-677,共5页Chemical Journal of Chinese Universities
基 金:国家自然科学基金(批准号:20633030,20721063,20873027);国家“九七三”计划项目(批准号:2009CB623506);国家“八六三”计划项目(批准号:2009AA033701);上海市重点学科建设项目(批准号:B108);上海市优秀学科带头人计划(批准号:10XD1400300)资助
摘 要:在水热条件下合成了4个含混合配体4,4'-bipy和2,2'-bipy/phen的多酸超分子化合物[Cu(4,4'-bipy)(2,2'-bipy)2]2[SiW12O40].4H2O(1),[Ag4(4,4'-bipy)3(2,2'-bipy)2][SiW12 O40].2H2O(2),[Cu(4,4'-bipy)(phen)]2[H3O]2[SiW12O40].8H2O(3)和[Cu(4,4'-bipy)(phen)Cl]2[H3O][H2PW12 O40].H2O(4)(bipy=联吡啶,phen=邻菲罗啉),采用红外光谱、热重分析、元素分析及X射线单晶衍射对化合物进行了表征.在苯乙烯催化环氧化反应中,化合物3和4显示了较高的催化活性,这与结构中存在配位不饱和金属中心有关.Four POM-based supramolecular complexes with mixed 4,4′-bipy and 2,2′-bipy/phen,[Cu(4,4′-bipy)(2,2′-bipy)2]2[SiW12O40]·4H2O(1),[Ag4(4,4′-bipy)3(2,2′-bipy)2][SiW12O40]·2H2O(2),[Cu(4,4′-bipy)(phen)]22[SiW12O40]·8H2O(3) and [Cu(4,4′-bipy-Cl)(phen)]2·H2O(4)(bipy=bipyridine,phen=phenanthroline) were synthesized under hydrothermal condition and characterized by IR,TG,elemental analysis and single-crystal X-ray diffraction.Compound 1 crystallized in the monoclinic system,space group P21/n,with a=1.2858(4) nm,b=2.0890(7) nm,c=1.5580(5) nm,β=102.306(4)°,V=4.089(2) nm3,Z=2,R1 = 0.0451,wR2 = 0.0934.Compound 2 crystallized in the monoclinic system,space group P21/n,with a=1.2766(4) nm,b=2.1258(6) nm,c=1.4491(4) nm,β=104.774(4)°,V=3.803(2) nm3,Z=2,R1=0.0429,wR2=0.0730.Compound 3 crystallized in the monoclinic system,space group C2/m,with a=1.9850(8) nm,b=1.4072(6) nm,c=1.2108(5) nm,β=110.629(6)°,V=3.165(2) nm3,Z=2,R1 = 0.0885,wR2 = 0.1647.Compound 4 crystallized in the monoclinic system,space group C2/m,with a=2.0376(7) nm,b=1.4031(5) nm,c=1.3784(5) nm,β=93.502(6)°,V=3.933(2) nm3,Z=2,R1 = 0.0561,wR2 = 0.1491.The catalytic activities of these compounds were tested in the epoxidation of styrene and compounds 3 and 4 exhibited high conversion of styrene and selectivity to epoxide.
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