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在Cu(acac) 2 甲醇溶液和Na3 BTC水溶液 (acac =乙酰丙酮 ,H3 BTC =1,3 ,5 均苯三羧酸 )的混合体系中制得绿色配位聚合物 {[NaCu(BTC) (H2 O) 4 ]·2H2 O}n.利用元素分析、X射线单晶衍射、红外光谱、荧光光谱及热重分析对聚合物进行表征 .晶体属单斜晶系 ,空间群为C2 /c ,晶胞参数a =2 165 7( 1)nm ,b =1 12 15 5 ( 5 )nm ,c =1 3 5 2 91( 7)nm ,β =12 2 3 79( 1)° ,V =2 775 2 ( 2 )nm3 ,Mr=40 1 74,Dc=1 92 3Mg·m-3 ,Z =8,μ(MoKα) =1 672mm-1,F( 0 0 0 ) =164 0 ,GOF =1 0 14 ,R =0 0 2 76,wR =0 0 766.晶体的基本构建单元中包含两个金属中心 (Cu2 + 和Na+ )、一个配位的BTC分子和四个配位的水分子 .基本构建单元通过相互链接形成具双层结构的二维网状聚合物 .化合物中金属中心Cu2 + 与Na+ 之间存在金属 -金属相互作用 ,形成无限的一维类金属线聚合物 .荧光光谱表明 ,常温下在λex=3 14nm激发后 ,配位聚合物在 42 0nm处出现强烈的荧光发射
The complex of green coordination polymer {[NaCu (BTC) ((Acac) 2) was prepared in a mixed system of Cu (acac) 2 methanol solution and Na3 BTC aqueous solution (acac = acetylacetone, H3 BTC = H 2 O) 4] · 2H 2 O} n.The polymers were characterized by elemental analysis, single crystal X-ray diffraction, infrared spectra, fluorescence spectra and thermogravimetric analysis.The crystals are monoclinic with space group C2 / c, The cell parameters a = 2 165 7 (1) nm, b = 1 12 15 5 (5) nm, c = 1 3 5 2 91 (7) nm, β = 12 2 3 79 (1) °, V = 2 775 2 (2) nm3, Mr = 40 1 74, Dc = 1 92 3Mg · m -3, Z = 8, μ MoKα = 1 672 mm -1, F 0 0 0 = 164 0, GOF 1 0 14, R = 0 0 2 76, wR = 0 0 766. The basic building block of the crystal contains two metal centers (Cu2 + and Na +), a coordinating BTC molecule and four coordinating water molecules. The basic The building blocks are connected to each other to form a two-dimensional network polymer with a double-layer structure. Metal-metal interaction exists between the Cu2 + and Na + metal centers in the compound to form an infinite one-dimensional metalloid linear polymer. After excitation at λex = 3 14 nm at room temperature, the coordination polymer showed strong fluorescence at 42 0 nm