| Mn(Ⅱ)配位聚合物的合成、结构及光物理性能 |
| Synthesis, Crystal Structure and Photo-Physical Property of Manganese(Ⅱ) Coordination Polymers |
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| 摘要: 采用水热方法合成了2种结构新颖的Mn(Ⅱ)配位聚合物，[Mn(m-tpha)(phen)]n(1)，{[Mn3(m-tpha)2(m-Htpha)2(bipy)2]·3H2O}n (2)，(m-H2tpha=间苯二甲酸，phen=1,10-邻菲咯啉，bipy=2，2′-联吡啶)。通过X-射线单晶衍射、红外光谱(IR)、紫外光谱(UV-Vis)、表面光电压光谱(SPS)和场诱导表面光电压光谱(FISPS)等方法对配聚物进行了表征。结构分析表明:配聚物(1)和(2)均是通过间苯二甲酸根桥连的具有1D无限结构的Mn(Ⅱ)配聚物。不同的是(1)的不对称单元中只包含1个Mn(Ⅱ)离子，它采取了N2O4的配位模式；而(2)的重复单元中，包含3个Mn(Ⅱ)离子，其中有2个Mn(Ⅱ)离子是晶体学等效的，它们也采取了N2O4的配位模式，另1个Mn(Ⅱ)离子处于一个几乎规则的正八面体场的配位环境中，6个配位原子均为O。配聚物的表面光电压光谱测试表明，它们在300～800 nm范围内都呈现正的表面光伏响应(SPV)，但是光伏响应带的强度、数量是明显不同的。这是它们的结构、中心金属Mn(Ⅱ)离子的配位微环境不同所致。将配聚物的SPS与其UV-Vis光谱进行对比，可以看出SPS响应带与UV-Vis吸收峰基本是对应的。 |
| 关键词: Mn(Ⅱ) 配位聚合物 晶体结构 光物理性能 |
| 基金项目: |
| Abstract: Two novel coordination polymers, [Mn(m-tpha)(phen)]n(1) and {[Mn3(m-tpha)2(m-Htpha)2(bipy)2]·3H2O}n (2) (m-H2tpha=isophthalic acid, phen=1,10-phenanthroline, bipy=2,2′-bipyridine) were synthesized by hydrothermal method. The crystal structures of the polymers were determined by X-ray single crystal diffraction. The result indicates that (1) and (2) are bridged by isophthalato ligand to form 1D infinite structures. The difference is that the asymmertric unit of polymer (1) only comprises a Mn(Ⅱ) ion, and it adopts N2O4 coordination mode. There are three Mn(Ⅱ) ions in the repeating unit of polymer (2). Among the three Mn(Ⅱ) ions, two of them are crystallography equivalents and also adopt N2O4 coordination modes, whereas another Mn(Ⅱ) ion adopts a nearly regular octahedral(O6) coordination mode. The polymers were identified by IR, UV-Vis, surface photovoltage spectrum (SPS) and field-induced surface photovoltage spectrum (FISPS). The results of SPS for polymers indicate that they both exhibit positive surface photovoltage response (SPV) in the range of 300～800 nm. However, the intensity and number of the SPV response bands are different obviously. The distinctions can be mainly attributed to their different structures and coordination environments of the manganese ions in the two polymers. Compared SPS with UV-Vis spectrum, they are basically correlation. CCDC: 705259, 1; 705257, 2. |
| Keywords: Mn(Ⅱ) coordination polymer crystal structure photo-physical property |
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| 刘东伟,张 丽,牛淑云,李 雷,史忠丰,金 晶,迟玉贤.Mn(Ⅱ)配位聚合物的合成、结构及光物理性能[J].无机化学学报,2009,25(12):2175-2181. |
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