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磺酸异核配位聚合物[CaAg_2(HL)_2(H_2O)]_n的合成、结构与荧光性质

Synthesis,crystal structure and luminescence of heterometallic sulfonate coordination polymer [CaAg_2(HL)_2(H_2O)]_n
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摘要 合成了一个新的三维网状磺酸银与碱土金属钙异核的配位聚合物[CaAg2(HL)2(H2O)]n(H3L=5-磺基水杨酸),并进行了元素分析、红外、热重、荧光、粉末及单晶X射线衍射等表征和研究。标题配合物属于单斜晶系,C2/c空间群,a=2.2819(5)nm,b=0.543 9(5)nm,c=1.806 1(6)nm,β=126.04(2)°,V=1.812 4(8)nm3,Z=4,R1=0.050 5。研究结果表明,银和钙离子均为扭曲的八面体配位构型,相邻的银离子通过羧基和羟基氧原子连接形成一维链状结构,且通过磺酸基氧原子和水分子桥联成二维层状结构;相邻的钙离子通过磺酸基和羟基氧原子连接形成一个二维层状结构,进而两个二维层状结构组装成一个三维网状结构,同时该配合物于室温下在440 nm处具有较强的蓝光发射。 A 3 - D coordination polymer, [ CaAg2 (HL) 2 ( H20 ) ] n ( H3 L = 5 - sulfosalicylic acid ), has been syn- thesized and characterized by elemental analysis, IR, TG, PL, powder and X -ray single crystal diffraction. The title complex crystallizes in monoclinic system with space group C 2/c, a = 2. 281 9 (5) nm, b = 0. 543 9 (5) rim, c=- 1. 806 1 (6) nm, β = 126.04(2)° and V = 1. 812 4(8) nm 3, Z=4, R1 =0. 050 5. The results show that the Ag(I) and Ca(II) ions adopt slightly distorted octahedron geometry. Adjacent Ag(I) ions have been linked into 1 - D chains through the oxygen atoms of carboxyl and hydroxyl groups, which are further extended into 2 - D layer by the bridging oxygen atoms of sulfonate and water molecules. Meanwhile, the adjacent Ca(Ⅱ) ions have been connected into 2 - D layer through the oxygen atoms of sulfonate and hydroxyl group. Then, a 3 - D framework is constructed by the overlapping of these two types of layers. In addition, this complex exhibits strong blue emission (440 nm) in solid state at room temperature.
出处 《黑龙江大学自然科学学报》 CAS 北大核心 2012年第6期781-785,共5页 Journal of Natural Science of Heilongjiang University
基金 黑龙江省自然科学基金重点项目(ZD200903) 黑龙江省高等学校科技创新团队资助项目(2010td03) 黑龙江教育厅科学技术研究项目(12511z023 2011CJHB006) 黑龙江大学创新团队资助项目(Hdtd2010-04)
关键词 磺酸配合物 晶体结构 热稳定性 荧光性能 sulfonate complex crystal structure thermal stability luminescent property
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参考文献16

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