4-(1,2,4-三唑-1-基)苯酚铜(Ⅱ)镍(Ⅱ)配合物的晶体结构及荧光性质

摘要

合成并通过单晶和粉末X射线衍射、元素分析、红外光谱、热失重以及荧光光谱技术表征了含有4-(1,2,4-三唑-1-基)苯酚(hptrz)配体的2个过渡金属配合物[[Ni(H2O)2(hptrz)2(tp)]·2DMF]n(1)和[Cu(hptrz)2(SCN)2]· 2H2O (2)(H2tp为对苯二甲酸).配合物1中八面体的Ni(Ⅱ)离子由tp2-阴离子拓展形成线性的一维链状结构;而配合物2则呈现中心对称的单核结构.配合物中,中性的hptrz配体呈现端基配位模式,并通过形成O-H…O氢键相互作用将低维结构拓展为高维超分子网络.此外,配体内的电荷转移使这2个配合物均在紫外区发射出强的荧光发射峰.%Two 4-(1,2,4-triazol-1-yl)phenol (hptrz)-based transition metal complexes,[[Ni(H2O)2(hptrz)2(tp)]· 2DMF]n (1) and [Cu(hptrz)2(SCN)2] ·2H2O (2) (H2tp=terephthalic acid),have been prepared and characterized by singlecrystal and powder X-ray diffractions,elemental analysis,FT-IR spectra,thermogravimertric and luminescence spectra.X-ray diffraction analysis revealed that 1 is a one-dimensional linear chain with octahedral Ni(Ⅱ) ions extended by bis-unidentate tp2-anions;whereas 2 exhibits a centrosymmetric mononuclear entity.The neutral hptrz ligand in the both complexes serves as terminal ligands to complete the metal coordination sphere and to help to assemble the low-dimensional aggregates into a high-dimensional supramolecular architecture by O-H … O hydrogen-bonding interactions.Additionally,the complexes display strong emissions in UV region originated from intraligand electronic transfer.