论文部分内容阅读
合成了四个锌-铕(或铽)异金属双核配合物[ZnEu(L1)2(NO3)3Py]·2Py·THF(1)、[ZnTb(L1)2(NO3)3Py]·Py·EtOH·2H2O(2)(HL1=1-H-2-(2-羟基-3-甲氧基苯基)苯并咪唑;Py=吡啶)和[ZnEu(L2)2(NO3)3Py]·Py·H2O(3)、[ZnTb(L2)2(NO3)3Py]·Py·H2O(4)(HL2=1-H-2-(2-羟基-3-甲氧基-5-溴苯基)苯并咪唑;Py=吡啶),其中1、2、3是单晶态,化合物4则为多晶样品;通过单晶X射线衍射、元素分析、傅里叶变换红外光谱和电喷雾质谱对化合物进行了表征.化合物的紫外-可见吸收光谱、荧光激发和发射光谱表明配体的激发态能量有效传递到配合物中的镧系金属离子中,含有铽(Ⅲ)离子的配合物发射出其特征发射光谱,而含有铕(Ⅲ)离子的配合物由于其它去活方式,没有辐射出铕(Ⅲ)离子的特征发射光谱.
Four Zn-Eu (or terbium) heterometal complexes [ZnEu (L1) 2 (NO3) 3Py] · 2Py · THF (1), [ZnTb (L1) 2 (NO3) 3Py] · Py · EtOH · 2H2O (2) (HL1 = 1-H-2- (2-hydroxy-3- methoxyphenyl) benzimidazole; Py = pyridine) and [ZnEu (L2) 2 (NO3) 3Py] H2O (3), [ZnTb (L2) 2 (NO3) 3Py] · Py · H20 (HL2 = 1-H-2- And imidazole; Py = pyridine), where 1, 2 and 3 were single crystalline and compound 4 was polycrystalline; the compounds were characterized by single crystal X-ray diffraction, elemental analysis, Fourier transform infrared spectroscopy and electrospray mass spectrometry The UV-Vis absorption spectra, fluorescence excitation and emission spectra of the compounds show that the excited state energy of the ligand is effectively transferred to the lanthanide metal ions in the complex, and the complexes containing terbium (III) ions emit their characteristic emission Spectra, whereas complexes containing europium (III) ions do not emit characteristic emission spectra of europium (III) ions due to other deactivation methods.