Conformation Diversity of Complexes Constructed by N-(2-Pyridylmethyl)-phenylalanine and Zn(Ⅱ) |
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作者姓名: | 李新发 刘庆燕 谢在来 李涛海 李亚峰 曹荣 |
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作者单位: | State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,The Chinese Academy of Sciences,Fuzhou,Fujian 350002,China |
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基金项目: | 国家重点基础研究发展规划(973计划),国家自然科学基金,福建省自然科学基金,The Distinguished Oversea Scholar Projct and One Hundred Talent Project from CAS |
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摘 要: | Four configurationally and conformationally related Zn(II) complexes with a tridentate ligand namely, N-(2-pyridylmethyl)-phenylalanine (Hpmpa), have been synthesized by hydrothermal reactions. [Zn(L-α-pmpa)2·HaO] 1: orthorhombic, space group P21212 with a = 15.1091(7), b = 16.2417(8), c = 5.9972(3) A, V= 1471.70(12)A^3, Z = 2, Mr = 593.97, Dc = 1.340 g/cm^3,μ = 0.879 mm^-1, F(000) = 620, Rint= 0.0205, R = 0.0450 and wR = 0.1578 for 3102 observed reflections with I 〉 2σ(I); [Zn(D-α-pmpa)2·2H2O] 2: orthorhombic, space group P21212 with a = 15.1023(6), b = 16.2516(7), c = 6.0024(2)A, V= 1473.21(10)A^3, Z = 2, Mr = 611.98, Dc = 1.380 g/cm^3,μ = 0.882 mm^-1, F(000) = 640, Rint= 0.0337, R = 0.0484 and wR = 0.1435 for 2408 observed reflections with I 〉 2σ(I); [Zn(L-β-pmpa)2] 3: monoclinic, space group C2/c with a = 27.8667(5), b = 5.60350(10), c = 19.9636(2)A β = 120:2210(10)°, V = 2693.66(7)A^3, Z = 4, Mr = 575.95, De= 1.420 g/cm^3,μ = 0.955 mm^-1, F(000) = 1200, Rint= 0.0345, R = 0.0358 and wR = 0.1135 for 2251 observed reflections with I 〉 2σ(I); and [Zn(D-β-pmpa)2] 4. They are all mononuclear discrete structures. The influence of temperature and pH on the conformation of structures has been investigated. Moreover, the photoluminescent properties of compounds 1 and 3 are also reported.
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关 键 词: | 锌配位化合物 氨基酸 构象 异构 结构分析 |
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