Syntheses,Structural Characterization and Fluorescent Properties of Zn(Ⅱ),Cd(Ⅱ) and (E)-$${{\rm{N}}^1}$$-(pyridin-4-ylmethylene) benzene-1,4-diamine Sulphate Complex Salts

Abstract

采用相同条件的液相层置法将${\rm{Z}}{{\rm{n}}^{2 + }}$、${\rm{C}}{{\rm{d}}^{2 +; }}$的硫酸盐与配体N-(1-亚甲基-4-吡啶基)-1,4-苯二胺((E)-${{\rm{N}}^1}$-(pyridin-4-ylmethyl; ene)benzene-1,4-diamine,pbda))反应,形成配合物[${\rm{Z}}{{\rm{n}}_2}$ ${\left(; {{\rm{pbda}}} \right)_2}$ ${\left( {{{\rm{H}}_2}{\rm{O}}} \right)_8}$] ·; $2{\rm{S}}{{\rm{O}}_4}$ $\left( {\textbf{1}} \right)$,${\left[; {{\rm{Cd}}{{\left( {{\rm{pbda}}} \right)}_2}{{\left(; {{{\rm{H}}_2}{\rm{O}}} \right)}_2}\left( {{\rm{S}}{{\rm{O}}_4}} \right)}; \right]_n}$ ${H_1}:\beta = {\beta _0} + {\alpha; _n}$,通过红外光谱、X射线单晶衍射对其组成和结构进行了表征,然后测试了单体和配合物的荧光性质.晶体结构的分析结果表明:配合物的结构由金属离子; 的半径调控;尽管${\rm{C}}{{\rm{d}}^{2 + }}$的离子半径显著大于${\rm{Z}}{{\rm{n}}^{2 +; }}$,但其合成的配合物的中心金属离子的配位数均为6,而配位方式和结构却完全不同;半径较大的金属离子更倾向于形成较高维数的结构;两者结构的不同导; 致其荧光性质存在着显著的差异.Two complexes,[${\rm{Z}}{{\rm{n}}_2}$ ${\left( {{\rm{pbda}}} \right)_2}$; ${\left( {{{\rm{H}}_2}{\rm{O}}} \right)_8}$] · $2{\rm{S}}{{\rm{O}}_4}$; $\left( {\textbf{1}} \right)$ and ${\left[ {{\rm{Cd}}{{\left(; {{\rm{pbda}}} \right)}_2}{{\left( {{{\rm{H}}_2}{\rm{O}}}; \right)}_2}\left( {{\rm{S}}{{\rm{O}}_4}} \right)} \right]_n}$ $\left(; {\textbf{2}} \right)$ (pbda = (E)-${{\rm{N}}^1}$-(pyridin-4-ylmethylene); benzene-1,4-diamine) were synthesized using layer diffusion under the; same condition. The complexes were characterized using IR spectra and; X-ray single crystal diffraction and showed completely different; fluorescent properties. Crystal structure analysis reveals that the; structures of the complexes are controlled by the radii of the metal; ions. Although ${\rm{C}}{{\rm{d}}^{2 + }}$ ion is significantly larger; than ${\rm{Z}}{{\rm{n}}^{2 + }}$ ion, both of the coordination numbers; of metal centers in these complexes are 6,and the coordination modes and; structures are completely different. The metal ion with larger radius; tends to form higher dimensional structure. Different coordinated; structures lead to different fluorescent emissions.国家自然科学基金; 国家基础科学人才培养基