【摘要】 合成了5个m eso-位和β-位具有不同取代基的Yb(Ⅲ)卟啉配合物(2a~2e),并对其结构进行了表征;研究了配合物的可见光谱和近红外光谱性质,测得了相关的量子产率和荧光寿命.研究结果表明,此类中性单核Yb(Ⅲ)卟啉配合物由于Yb3+的存在,导致卟啉配体发生π→π*跃迁,并将吸收的可见光能量传递给Yb3+的激发态,使得配合物在近红外光区有很强的发光,且m eso-位为供电子基团的Yb(Ⅲ)卟啉配合物的发光效率比含吸电子基团的Yb(Ⅲ)卟啉配合物高,而β-位溴化的Yb(Ⅲ)卟啉配合物的发光效率较差.更多还原

【Abstract】 A series of ytterbium(Ⅲ) monoporphyrinate complexes(2a—2e),bearing different substituents on meso-or β-position,were synthesized and characterized via UV-Vis,1H NMR,high-resolution mass spectra and elemental analysis.The photoluminescent properties of the complexes,especially in the near-infrared region,were studied in detail.Related quantum yield and fluorescence lifetime show that the energy is transferred to the excited state of ytterbium(Ⅲ) ion caused by excitation of the π→π* transitions of porphyrinate,which led to strong NIR emission.The light-emitting efficiency of the complexes with electron-donating substi-tuents on meso-position is better than that of complexes with electron-withdrawing substituents,while the complex with bromide on β-position possesses the poor ability of light-emitting.更多还原