在合成2-(3-羟基-2-吡啶基)-苯并咪唑的基础上,利用NMR(1H,13C,COSY,HSQC和HMBC),MS,IR和UV进行了详细表征;通过X-ray单晶衍射测定该化合物的晶体结构,实验结果表明该晶体属于单斜晶系{空间群为P21/c,a=14.289(3)A,b=10.618(2)A,c=12.783(3)A,β=93.51(3)°,V=1935.8(7)A^3,Z=8},很好支持了波谱表征的结果.2-(3-羟基-2-吡啶基)-苯并咪唑的荧光光谱表明,该化合物在激发态下存在双质子转移现象,密度泛函计算结果合理解释了实验现象.
2-(3-Hydroxy-2-pyridyl)benzimidazole was synthesized and characterized well by NMR (1H, 13C, COSY, HSQC, and HMBC), MS, IR, and UV techniques, together with X-ray single crystal diffraction throughly. The diffraction experiment confirmed the results of spectroscopic analysis and showed that the crystal belongs to monoclinic, space group P21/c with unit cell parameters a=14.289(3)A, b=10.618(2)A, c=12.783(3)A, β=93.51(3)°, V=1935.8(7)A^3, and Z=8. The fluorescence spectrum indicates that there has been a double proton transfer in excited state. The results of density functional calculations provide a reasonable explanation on the experimental phenomena.