一维发光镉配位聚合物的合成、晶体结构及识别性能
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摘要
采用芳香取代的咪唑二羧酸配体2-(对氰基)苯基-4,5-咪唑二羧酸(p-CNPh H3IDC),在含氮螯合配体2,2'-联吡啶(2,2'-bipy)的存在下,利用水热反应,制备了一个具有混合配体的一维链状配位聚合物:[Cd(p-CNPh HIDC)(2,2'-bipy)]n(1)。通过元素分析、傅里叶变换红外光谱仪以及单晶X射线衍射等技术手段研究了配位聚合物1的结构和性能。结果表明,该配位聚合物稳定性较好,在231. 6℃前结构稳定。经乙睛、甲醇、乙醛等溶剂浸泡后,配位聚合物1的荧光强度发生了一定程度的减弱(乙醛和CH2Cl2)或增强(DMF、硝基苯、丙酮),仅有吡啶溶剂使其荧光发射波长发生了60 nm的蓝移,显示其对吡啶有比较好的识别作用。
By reaction of an aryl substituted imidazole dicarboxylate ligand 2-( 4-cyanophenyl)-1 H-imidazole-4,5-dicarboxylic acid( p-CNPhH3 IDC) with cadmium nitrate,in the presence of N-containing chelate ligand,2,2'-bipyridine( 2,2'-bipy), a one-dimensional chain-like coordination polymer,[Cd( p-CNPhHIDC)( 2,2'-bipy) ]n( 1) with mixed ligands was prepared hydrothermally. The structure and properties of the coordination polymer were studied by elemental analysis, Fourier transform infrared spectrometer and single crystal X-ray diffraction. The results show that the coordination polymer has good thermal stability under 231. 6 ℃. After being soaked in acetonitrile,methanol,acetaldehyde and other solvents,the fluorescence intensity of coordination polymer 1 was weakened( aldehyde,CH2 Cl2) or enhanced( DMF,nitrobenzene and acetone) to a certain extent. A 60 nm blue shift in its fluorescence emission,in pyridine indicated a good identification effect on pyridine by this polymer.
By reaction of an aryl substituted imidazole dicarboxylate ligand 2-( 4-cyanophenyl)-1 H-imidazole-4,5-dicarboxylic acid( p-CNPhH3 IDC) with cadmium nitrate,in the presence of N-containing chelate ligand,2,2'-bipyridine( 2,2'-bipy), a one-dimensional chain-like coordination polymer,[Cd( p-CNPhHIDC)( 2,2'-bipy) ]n( 1) with mixed ligands was prepared hydrothermally. The structure and properties of the coordination polymer were studied by elemental analysis, Fourier transform infrared spectrometer and single crystal X-ray diffraction. The results show that the coordination polymer has good thermal stability under 231. 6 ℃. After being soaked in acetonitrile,methanol,acetaldehyde and other solvents,the fluorescence intensity of coordination polymer 1 was weakened( aldehyde,CH2 Cl2) or enhanced( DMF,nitrobenzene and acetone) to a certain extent. A 60 nm blue shift in its fluorescence emission,in pyridine indicated a good identification effect on pyridine by this polymer.
引文
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[5]WANG Zheng,YIN Shaoyun,PAN Mei,et al. Assembly and Luminescence of Mononuclear Ln to Heteronuclear Ln-M Supramolecular Complexes[J]. Chinese J Appl Chem,2017,34(9):1017-1023(in Chinese).王政,尹少云,潘梅,等.单核Ln到异核Ln-M超分子配合物的组装与发光性能[J].应用化学,2017,34(9):1017-1023.
[6]Yi F Y,Chen D X,Wu M K,et al. Chemical Sensors Based on Metal-Organic Frameworks[J]. Chem Plus Chem,2016,81(8):675-690.
[7]Pan M,Liao W M,Yin S Y,et al. Single-Phase White-Light-Emitting and Photoluminescent Color-Tuning Coordination Assemblies[J]. Chem Rev,2018,118(18):8889-8935.
[8]PAN Mei,WEI Zhangwen,XU Yaowei,et al. Coordination Assembly of Metal-Organic Materials[J]. Prog Chem,2017,29(1):47-74(in Chinese).潘梅,韦张文,徐耀维,等.配位超分子自组装[J].化学进展,2017,29(1):47-74.
[9]Huang Q Y,Wang J F,Wang Q,et al. Luminescent Sensing of Fe3+and K+by Three Novel Imidazole Dicarboxylate-Based MOFs[J]. Supramol Chem,2017,29(3):193-204.
[10]Yue Z F,Chen Z N,Yao M J,et al. Selective Pyridine Recognition by a Imidazole Dicarboxylate-Based 3D Cadmium(Ⅱ)MOF[J]. RSC Adv,2014,4(63):33537-33540.
[11]Zhu Y C,Ren X,Wang J,et al. Construction and Properties of Two MOFs Based on 2-p-Bromophenyl Imidazole Dicarboxylate[J]. Z Anorg Allg Chem,2015,641(5):809-813.
[12]Li Z F,Luo X B,Gao,Y C,et al. Four Cadmium(Ⅱ)Polymeric Frameworks Constructed by 2-Methyl or 2-Ethylimidazole Dicarboxylates[J]. Inorg Chim Acta,2012,384:352-362.
[13]Shi B B,Zhu Y C,Guo L L,et al. Two Dimethylphenyl Imidazole Dicarboxylatebased Lanthanide Metal-Organic Frameworks for Luminescence Sensing of Benzaldehyde[J]. Dalton Trans,2015,44:4362-4369.
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