| 3-(4'-羧基-苯氧基)苯甲酸构筑的Cu(Ⅱ)/Zn(Ⅱ)配位聚合物的合成、晶体结构及对丙酮和Tb3+离子的荧光传感 |
| Cu(Ⅱ)/Zn(Ⅱ) Coordination Polymers Constructed by 3-(4'-Carboxy-phenoxy) benzoic Acid: Synthesis, Crystal Structure and as a Fluorescence Sensor to Acetone and Tb3+ Ion |
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| 摘要: 利用水热法合成了2个新的配位聚合物（CPs）：[M（3，4'-oba）（phen）（H2O）]n（M=Zn（1）、Cu（2），3，4'-H2oba=3-（4'-羧基-苯氧基）苯甲酸，phen=菲咯啉），并用X射线单晶衍射测定其晶体结构。CP 1为一维链状结构，中心金属Zn2+的配位环境为[ZnO3N2]，形成四方锥构型。配体3，4'-oba以μ1：η1η0/μ1：η1η0的模式与Zn2+配位。CP 2中Cu2+的配位环境为[CuO4N2]，呈扭曲的八面体构型。配体3，4'-oba采用μ1：η1η0/μ1：η1η1的模式连接2个Cu2+形成一维“之”字链结构。一维链分别通过分子间氢键C—H…O（1）和O—H…O（2）形成二维超分子网状结构。配体phen以双齿螯合的形式与Zn2+/Cu2+配位。CP 1表现出强的荧光，归因于配体的π*-π跃迁。研究了1在不同溶剂中的发光性能以及对镧系金属离子的荧光敏化效果。CP 1的荧光被丙酮分子猝灭，而可以敏化稀土金属Tb3+离子发出强的绿色荧光，因而1可作为检测丙酮分子和Tb3+离子的荧光传感器。 |
| 关键词: 过渡金属 配位聚合物 晶体结构 荧光 |
| 基金项目: 国家自然科学基金（No.21471104，21371123）资助。 |
| Abstract: Taking 3-(4'-carboxyl-phenyloxy) benzoic acid (3,4'-H2oba) and phenanthroline (phen) as ligands, two coordination polymers (CPs) [M(3,4'-oba) (phen) (H2O)]n (M=Zn (1), Cu (2)) were synthesized by hydrothermal method and their structures were characterized by X-ray single crystal diffraction. CP 1 features a one-dimensional chain structure. The coordination environment of Zn2+ ion is[ZnO3N2], forming tetragonal vertebral configuration. The Zn2+ ions are linked by 3,4'-oba ligands through μ1:η1η0/μ1:η1η0 coordination modes. CP 2 has a structure with[CuO4N2] coordination unit. Ligand 3,4'-oba uses the pattern of μ1:η1η0/μ1:η1η1 to connect two Cu2+ to form a 1D zigzag chain structure. The 1D chain forms a 2D supramolecular network structure through hydrogen bonds (C—H…O in 1 and O—H…O in 2). Ligand phen coordinates with Zn2+/Cu2+ by bidentate chelation mode. CP 1 showed strong fluorescence, which is attributed to the π*-π transition of the ligand. The fluorescence properties of 1 in different solvents and the fluorescence sensitization effect on lanthanide metal ion were studied. The fluorescence of CP 1 was quenched by acetone molecule, and it can sensitize the rare earth metal Tb3+ ions to emit strong green fluorescence. Therefore, 1 can be used as a fluorescence sensor for detecting acetone molecule and Tb3+ ion. |
| Keywords: transition metal coordination polymer crystal structure fluorescence |
| 投稿时间：2021-01-05 修订日期：2021-05-23 |
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| 李振华,罗李林,万重庆,胡悦琪,周若涵,李夏.3-(4'-羧基-苯氧基)苯甲酸构筑的Cu(Ⅱ)/Zn(Ⅱ)配位聚合物的合成、晶体结构及对丙酮和Tb3+离子的荧光传感[J].无机化学学报,2021,37(8):1381-1389. |
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