CAJ | 학술논문

合成了5个meso-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Yb~(3+)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Yb~(3+)的激发态, 使得配合物在近红外光区有很强的发光, 且meso-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.
합성료5개meso-위화β-위구유불동취대기적Yb(Ⅲ)계람배합물(2a～2e), 병대기결구진행료표정;연구료배합물적가견광보화근홍외광보성질, 측득료상관적양자산솔화형광수명. 연구결과표명, 차류중성단핵Yb(Ⅲ)계람배합물유우Yb~(3+)적존재, 도치계람배체발생π→π*약천, 병장흡수적가견광능량전체급Yb~(3+)적격발태, 사득배합물재근홍외광구유흔강적발광, 차meso-위위공전자기단적Yb(Ⅲ)계람배합물적발광효솔비함흡전자기단적Yb(Ⅲ)계람배합물고, 이β-위추화적Yb(Ⅲ)계람배합물적발광효솔교차.
A series of ytterbium (Ⅲ) monoporphyrinate complexes (2a-2e) , bearing different substituents on meso- or B- 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 substituents on meso-position is better than that of complexes with electron-withdrawing substituents, while the complex with bromide on B-position possesses the poor ability of light-emitting.