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Structural diversity, magnetic properties, and luminescence sensing based Ni(II)/Zn(II) coordination polymers of the semirigid 3,3′-((5-carboxy-1,3-phenylene)bis(oxy))dibenzate ligand
CrystEngComm ( IF 3.1 ) Pub Date : 2020-07-06 , DOI: 10.1039/c9ce01998g
Dong-Dong Yang 1, 2, 3, 4, 5 , Li-Ping Lu 1, 2, 3, 4, 5 , Miao-Li Zhu 1, 2, 3, 4, 5
Affiliation  

Two two-dimensional Ni(II) or Zn(II)-based coordination polymers, namely [[Ni34-cpboda)22-H2O)2(DMF)2(H2O)2]·3DMF·2HCOOH·2H2O]n (1) and [[Zn34-cpboda)22-H2O)2(DMF)2(H2O)2]·3DMF·3HCOOH·3H2O]n (2), a three-dimensional Ni(II)-based coordination polymer, namely [[Ni33-cpboda)2(1,4-bib)5(H2O)2]·DMF]n (3), and a dinuclear Zn(II) complex, namely [Zn (μ2-Hcpboda)(2,2-bipy)(H2O)]2 (4) (H3cpboda = 3,3′-((5-carboxy-1,3-phenylene)bis(oxy))dibenzoic acid, 2,2-bipy = 2,2-bipyridine, 1,4-bib = 1,4-di(1H-imidazol-1-yl)benzene), were successfully synthesized under solvothermal conditions and characterized via single-crystal X-ray and powder diffraction analyses, elemental analyses (EA), FT-IR spectroscopy, and thermogravimetric analysis (TGA). Complexes 1 and 2 show isomorphism and (3,4,6)-connected 2D sheet structures with the (32·4)2(32·83·9)2(34·4·282·94·103) topology. Complex 3 is a 4,4,7-connected 3D structure with the (42·52·62)2(46·5·614)2(54·6·8) topology. Complex 4 is only a simple dinuclear structure. Magnetization measurements disclose the weak ferromagnetic behavior between Ni(II) ions in the complexes 1 and 3. Fluorescence measurements indicate that 2 and 4 exhibit fast, sensitive, and selective luminescence quenching responses towards Cr2O72−/CrO42− in an aqueous solution. The limit of detection for Cr2O72−/CrO42− ions were estimated to be 0.51 and 0.60 ppm for 2 (0.89 and 1.03 ppm for 4), respectively, which are comparable to those reported for the CP-based fluorescent probes that can simultaneously detect Cr2O72−/CrO42− in aqueous environments. Moreover, 2 and 4 can be easily regenerated after the detection experiments, which is indicative of the excellent recyclability. All these results suggest that complexes 2 and 4 are highly selective and recyclable luminescence sensing materials for the quantitative detection of Cr2O72−/CrO42− anions in aqueous solutions.

中文翻译:

半刚性3,3'-(((5-羧基-1,3-亚苯基)双(氧基))二苯甲酸酯配体的结构多样性,磁性和基于发光传感的Ni(II)/ Zn(II)配位聚合物

两个二维的Ni(II)或Zn(II)基的配位聚合物,即[[倪3(μ 4 -cpboda)2(μ 2 -H 2 O)2(DMF)2(H 2 O)2 ] ·3DMF·2HCOOH·2H 2 O] ñ1)和[[锌3(μ 4 -cpboda)2(μ 2 -H 2 O)2(DMF)2(H 2 O)2 ]·3DMF·3HCOOH· 3H 2 O] n2),一个三维的Ni(II)为基础的配位聚合物,即[[倪3(μ 3 -cpboda)2(1,4-BIB)5(H 2 O)2 ]·DMF] Ñ3),和双核锌(II)配合物,即[锌(μ 2 -Hcpboda)(2,2-联吡啶)(H 2 O)] 24)(H 3 cpboda = 3,3' - ((5- -羧基-1,3-亚苯基)双(氧基))二苯甲酸,2,2-bipy = 2,2-联吡啶,1,4-bib = 1,4-二(1 H-咪唑基-1-基)苯)在溶剂热条件下成功合成,并通过单晶X射线和粉末衍射分析,元素分析(EA),FT-IR光谱和热重分析(TGA)进行了表征。配合物12显示同构和(3,4,6)连接的2D薄片结构,其(3 2 ·4)2(3 2 ·8 3 ·9)2(3 4 ·4· 2 8 2 ·9 4 ·10 3)拓扑。配合物3是4,4,7连接的3D结构,其(4 2 ·5 2·6 22(4 6 ·5·6 142(5 4 ·6·8)拓扑。复合物4仅仅是简单的双核结构。磁化测量揭示了配合物13中Ni(II)离子之间的弱铁磁行为。荧光测量表明24在水溶液中对Cr 2 O 7 2- / CrO 4 2-表现出快速,灵敏和选择性的发光猝灭响应。Cr 2 O的检出限7 2- / CRO 4根2-离子被估计为0.51和0.60 ppm的为2(0.89和1.03 ppm的为4),分别,其比得上那些报道的基于CP的荧光探针,可以同时检测的Cr 2 ö在水环境中为7 2− / CrO 4 2−。而且,在检测实验之后, 24可以很容易地再生,这表明了极好的可回收性。所有这些结果表明复合物24是高度选择性和可回收利用的发光传感材料,用于定量检测水溶液中的Cr 2 O 7 2- / CrO 4 2-阴离子。
更新日期:2020-08-10
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