5,7-二碘-8-羟基喹啉锌(Ⅱ):合成、晶体结构及光物理性质  

New Zinc(Ⅱ) Complex with 5,7-Diiodo-8-hydroxyquinoline:Synthesis, Crystal Structure and Photophysical Properties

作　　者：耿浩 陶明 倪海亮 GENG Hao;TAO Ming;NI Hai-liang(Department of Sciences,Xichang University,Xichang 615000,China;College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610068,China)

机构地区：[1]西昌学院理学院,四川西昌615000 [2]四川师范大学化学与材料科学学院,四川成都610068

出　　处：《广州化学》2022年第1期32-37,共6页Guangzhou Chemistry

基　　金：西昌学院博士启动项目(YBZ202114);西昌学院两高项目(LGLZ201811)。

摘　　要：以5,7-二碘-8-羟基喹啉为配体和乙酸锌为原料,采用混合溶剂加热回流方法合成了新的金属锌配合物,并通过核磁、高分辨质谱、元素分析、X-射线单晶衍射、热重分析、紫外―可见光光谱、荧光光谱对其进行了结构解析与光物理性质研究。X-射线结果表明,配合物为单核配合物,属于三斜晶系■;其晶胞参数为a=1.03695(6)nm,b=1.16167(7)nm,c=2.13552(13)nm,α=102.67(5)ºβ=95.57(5)º,γ93.63(5)V=2.488(3)nm^(3)。紫外―可见光光谱测试中,配合物在418 nm处的新吸收峰归属于金属到配体电荷转移(MLCT)。室温下,配合物具有明显的光致发光(PL)光谱,在四氢呋喃(THF)中的最大PL光谱在550 nm处,发光寿命为1.6 ns,将室温下的发光归属于金属到配体的单线态(1MLCT)荧光。配合物在THF溶液中的PL量子效率为0.45。而在低温77K下,配合物的最大PL光谱发生了轻微蓝移至543 nm,寿命为0.17ms,配合物在低温下的发射归属于3MLCT和3LC三线态混合的磷光。室温时,配合物PL发射光谱的CIE坐标值为(0.405,0.561),是一种黄光配合物。A new zinc complex was synthesized through mixed solvent refluxing method using 5,7-diiodo-8-hydroxyquinoline and Zn(CH_(3)COO)_(2) as raw material.Its structure and photophysical properties were well performed by ^(1)H-NMR,HRMS,elemental analysis,X-ray diffraction,TGA,UV-Vis and photoluminescence(PL)spectra.Single crystal X-ray diffraction results reveal that the complex is in the triclinic system,space group of P1̅with a=1.03695(6)nm,b=1.16167(7)nm,c=2.13552(13)nm,α=102.67(5)º,β95.57(5)º,γ=93.63(5),V=2.488(3)nm^(3).UV-Vis spectra show moderate absorption bands at around 418 nm with extinctions between 0.12 and 0.81×10^(4)L/(mol‧cm)were observed for the complex in THF solution,which are attributed to metal-to-ligand charge transfer(MLCT).The emission maximum values of the complex in degassed and anhydrous THF solution is 550 and 543 nm at room temperature and 77 K,respectively.The lifetime of the complex is 1.6 ns at 298 K,0.17μs at 77 K.Wetentatively assign the emissions to ^(1)MLCT at 298 K and mixed ligand centered triplet(^(3)LCT)and ^(3)MLCT excited states at 77 K.The PL quantum yield of the complex is 0.45 under 298 K.The calculated CIE coordinates(0.405,0.561)show the complex is yellowlight emitting.

关 键 词：5 7-二碘-8-羟基喹啉 锌配合物 合成 晶体结构 光物理性质 

分 类 号：O626.32[理学—有机化学]