论文部分内容阅读
利用电子吸收光谱和发射光谱 ,研究具有光致发光性能的三配位Ag (Ⅰ )配合物[Ag2 (μ PNP) 3](ClO4 ) 2 (PNP =2 ,6 双二苯基膦吡啶 )的光谱性质 ,电子吸收光谱中约 2 6 0和 30 0nm处的肩峰吸收分别被指定为l→aπ(l代表膦的孤对电子 ,aπ 是苯环的反键轨道 )和l→π (π 表示吡啶的π反键轨道 )跃迁。室温下受紫外可见光激发 ,配合物的乙腈溶液显示了发光性质 ,其发射峰位于 5 2 5nm ,这是由配体激发态引起的。利用吸收和发射光谱 ,研究了配合物光物理性质在不同客体分子如AuPPh3Cl,AgCF3SO3和 [Cu(CH3CN) 4](ClO4 )存在下光物理性质的改变情况。在配合物中 ,配体PNP和Ag(Ⅰ )形成一个空穴 ,可以结合外来的离子 ,从而引起光物理性质的改变 ,这种改变 ,使 [Ag2 (μ PNP) 3](ClO4 ) 2 可以作为作为客体离子的检测探针或传感器。
The photoluminescence properties of a three-coordinated Ag (Ⅰ) complex [Ag2 (μPNP) 3] (ClO4) 2 (PNP = 2, 6 bis-diphenylphosphine pyridine) were studied by electron absorption spectroscopy and emission spectroscopy Spectral properties. Shock absorbances at about 260 and 300 nm in the electron absorption spectrum are designated as l → aπ (l represents the lone pair of electrons of the phosphine, aπ is the antibonding orbital of the benzene ring) and l → π (π Π-antibonding orbit) transition of pyridine. Under UV-Vis excitation at room temperature, the acetonitrile solution of the complex showed a luminescent property with an emission peak at 525 nm, which is caused by the excited state of the ligand. The changes of photophysical properties of the complexes under different guest molecules such as AuPPh3Cl, AgCF3SO3 and [Cu (CH3CN) 4] (ClO4) were studied by absorption and emission spectra. In the complex, the ligands PNP and Ag (I) form a hole that binds extraneous ions, causing changes in the photophysical properties of the [Ag2 (μPnP) 3] (ClO4) 2 As a detection probe or sensor for guest ions.