3-甲基-1-乙酰基-5-(2-羟基苯基)-4,5-二氢吡唑及其铕和铽配合物的合成与光谱学研究  

Study on Synthesis and Fluorescence Characterization of Europium and Terbium Complexes of 1-(5-(2-Hydroxyphenyl)-3-Methyl-4,5-Dihydropyrazol-1-yl) Ethanone

作　　者：胡飞龙[1] 庄季昌[1] 尹显洪[1] 武巧兰[1] 张珊珊[1] 张峰[1] 

机构地区：[1]广西民族大学化学与生态工程学院,广西南宁410006

出　　处：《光谱学与光谱分析》2010年第7期1872-1875,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20761002)资助

摘　　要：以六水合硝酸铽和六水合硝酸铕,3-甲基-1-乙酰基-5-(2-羟基苯基)-4,5-二氢吡唑(HL),1,10-邻菲罗啉和三苯基氧磷(TPPO)合成了TbL3.2 H2O,TbL2(phen).H2O,TbL2(TPPO),EuL3.2 H2O,EuL2(phen).2 H2O,EuL2(TPPO).2 H2O6个固体配合物。用元素分析,红外光谱,荧光光谱对配合物进行了组分确定和结构表征。IR表明,自由配体HL与稀土离子配位后,位于1644 cm-1处的νC C发生移动,相应的νC N振动吸收峰降到了1 600 cm-1,结合元素分析等其他表征说明HL和稀土离子发生配位。室温下测定了配合物的荧光激发光谱和发射光谱,激发光谱表明配合物EuL2(Phen).2 H2O和TbL2(Phen).H2O的最佳激发波长分别为310和320 nm,在此激发波长下扫描发射光谱,EuL2(Phen).2 H2O和TbL2(Phen).H2O相对荧光强度最强,第二配体phen对Eu3+和Tb3+离子的荧光发射强度有明显的增强作用。Six solid complexes（TbLa · 2H2O, TbL2 （phen） · H2O, TbL2 （TPPO）, EuL3 ·2H2O, EuL2 （phen） · 2H2O and EuL2 （TPPO） · 2H2 O） have been synthesized based on the pyrazole ligand（HL）（phen= 1,10 phenanthroline, TPPO=Tri phcnylphosphine oxide, HL= 1 （5-（2-hydroxyphenyl）-3-methyl-4,5-dihydropyrazol-l-yl） ethanone）. These complexes were characterized by elemental analysis, IR spectra, and fluorescence spectra. The IR spectra indicated that all complexes exhibited the characteristic peaks of asymmetric stretching vibration vc-o and symmetric stretching vibration vc-N peaks. The C=O stretching band at 1 644 cm 1 of HL molecule shifted to lower band in the complexes. The O-H band at 3 072 of the HL lignd is also shifted to lower band. All these shifts indicated that carbonyl group, O-H and C=N take part in coordinating with the rare-earth ion in the form of bridging tridentate. The excitation and emission spectra of the six complexes were determined at room temperature and the results show that EuL2 （Phen） · 2H2O and ThL2 （Phen） · 2H2O display the strongest relative fluores cence intensity with the excited bands at 310 and 320 nm, respectively. Meanwhile, the emission intensities of Eu^3＋ and Tb〉 complexes were greatly sensitized by phen.

关 键 词：稀土 配合物 荧光光谱 吡唑 

分 类 号：O644.1[理学—物理化学]