【作者】 马德运； 李湘； 郭海福；

【Author】 De-Yun Ma;Xiang Li;Hai-Fu Guo;School of Chemistry and Chemical Engineering,Zhaoqing University;

【机构】 肇庆学院化学化工学院；

【摘要】 溶剂热条件下采用Zn(NO3)2·6H2O,1,4-萘二甲酸和3,3′-二甲基-4,4′-联吡啶为原料合成出一个新的三维锌金属有机框架化合物[Zn2(1,4-ndc)2(dmbpy)]n(1,4-ndc=1,4-萘二甲酸,dmbpy=3,3′-二甲基-4,4′-联吡啶)(1),并分别采用元素分析,红外光谱,差热分析,X-射线粉末衍射和X-射线单晶衍射等手段表征该结构。晶体结构分析结果显示化合物1为三维二重穿插网络结构:浆轮式的双核{Zn2(COO)2N2O2}单元可看作为二级构筑单元,这些二级构筑单元被1,4-萘二甲酸离子连接成二维层状结构,并进一步被支撑体3,3′-二甲基-4,4′-联吡啶构筑成三维超分子结构[1-3]。单个三维结构中存在6.7×6.72的单孔道,从而有利于另外一个相同三维结构的重叠,导致二重穿插的三维结构。支撑体3,3′-二甲基-4,4′-联吡啶中憎水性基团甲基的存在大大提高了化合物1的憎水性,X-射线粉末衍射表明化合物1在高湿度水汽条件下裸露30天后仍然表现出优异的结构稳定性[1]。此外,化合物1常温固态下的三维荧光结果表明,在344-354nm范围内的激发波长条件下,在445nm处有个最大发射光谱峰。更多还原

【Abstract】 The solvothermal reaction of Zn(NO3)2·6H2O with 1,4-naphthalenedicarboxylic(1,4-H2ndc) and 3,3’-dimethyl-4,4′-bipyridine(dmbpy) generates a new 3D zinc-organic framework,[Zn2(1,4-ndc)2(dmbpy)]n,(1).Two adjacent ZnII atoms form a paddle-wheel Zn2(COO)4 secondary building unit(SBU),which is linked by 1,4-ndc linkers with bis(syn,syn-bridging bidentate) bonding modes within the layer to form a 2D net and is further pillared by dmbpy struts to give rise to a 3D framework with channels of 6.7 × 6.7 2.Complex 1 performs a twofold interpenetrating network with an α-polonium type topology and exhibits excellent stability to water.3D luminescence spectra of 1 was detected at room temperature under excitation,with emission wavelengths of 344-354 nm and 360-630 nm with the interval of 0.15 and 2 nm,respectively.更多还原