吡啶-2-甲醛肟钛氧簇合物的合成、结构调控及光电性质

Syntheses,Structure-Regulation,and Photoelectric Properties of 2-Pyridinecarbaldehyde Oxime Assembled Titanium Oxo Clusters

通过溶剂热合成方法,以吡啶-2-甲醛肟(HPycox)和Ti(O^(i)Pr)_(4)合成了双核钛配合物[Ti_(2)(μ_(2)-O)(Pycox)_(2)(O^(i)Pr)_(4)](1)。通过结构分析,分别使用二苯基膦酸和苯基膦酸对其进行结构调控,成功制备了三核钛配合物[Ti_(3)(μ_(2)-O)_(2)(Pycox)_(2)(Ph_(2)PO_(2))_(2)(O^(i)Pr)_(4)](2)和六核钛配合物[Ti_(6)(μ_(2)-O)_(2)(μ_(3)-O)_(2)(Pycox)_(2)(Ph PO_(3))_(4)(O^(i)Pr)_(6)]·2CH_(3)CN (3)。配合物1~3的光学带隙分别为2.89、3.00和2.87 e V,其中配合物2的光电流密度可达0.1μA·cm^(-2)。

Ti_(2)(μ_(2)-O)(Pycox)_(2)(O^(i)Pr)_(4)](1) was solvothermally synthesized by the reaction of 2-pyridinecarbaldehyde oxime (Hpycox) and Ti(O^(i)Pr)_(4)in a simple and general approach.Interestingly,by analyzing the structure of1,diphenylphosphinic acid and phenylphosphonic acid were selected respectively to regulate the structure of1,and[Ti_(3)(μ_(2)-O)_(2)(Pycox)_(2)(Ph_(2)PO_(2))_(2)(O^(i)Pr)_(4)](2) and[Ti_(6)(μ_(2)-O)_(2)(μ_(3)-O)_(2)(Pycox)_(2)(Ph PO_(3))_(4)(O^(i)Pr)_(6)]·2CH_(3)CN (3) were successfully obtained.Moreover,their light absorption behaviors,band gaps,and photocurrent responses were also investigated.The band gaps of complexes1-3were 2.89,3.00,and 2.87 e V,respectively.Among the three complexes,complex2exhibited the largest photocurrent density with the value of 0.10μA·cm^(-2).CCDC:2149944,1;2149949,2;2149950,3.