中文摘要：

使用溶剂热法合成了三种具有不同分子对称性的三明治结构的铒酞菁,并用时间飞行质谱、元素分析、紫外-可见-近红外吸收谱和近红外光致发光谱对它们的结构和近红外光谱特性进行了表征.在酞菁铒[Er(Pc)2]的吸收谱中,可以明显看到其中位于318 nm附近的吸收带为B带,对应着酞菁配体的π-π*电子跃迁.位于667 nm附近的吸收带为Q带,也对应着酞菁配体的π-π*电子跃迁,1528 nm附近有一个强度非常弱的吸收,对应着三价铒离子4I15/2-4I13/2跃迁的吸收.在二苯甲酰基甲烷酞菁铒[Er(Pc)(DBM)]的吸收谱中,与Er(Pc)2的吸收谱类似,只是Q带红移了11 nm,达到672 nm,B带红移了24 nm,达到342 nm.值得注意的是:随着配合物分子结构不对称性的增加1530 nm附近的发射增强.这被认为是由于三价铒离子所处的配体场的不对称性的增加导致原本宇称禁阻的4f-4f跃迁几率增加,从而使1530 nm附近发射增强.1530 nm处的发光对应着三价铒离子4I15/24-I13/2跃迁.更多还原

英文摘要：

Three kinds of sandwiched erbium phthalocyanines Er（Pc）（DBM） and Er（Pc）2 with different molecular symmetry were synthesized by using solvothermal synthesis method and characterized by Mass Spectra（MS）, elemental analysis, Ultraviolet visible Near-infrared（UV-vis-NIR） absorption and Near-infrared （NIR） photoluminescence spectra. In the ultraviolet visible absorption spectra of Er（Pc）2, the absorption band at 318 nm corresponding to B band was obviously observed,which corresponded to the π-π＊ transition of phthalocyanine ligand. The absorption band at 667 nm corresponded to Q band, which could also be assigned to be the π-π＊ transition of phthalocyanine ligand. The very weak absorption band at 1 528 nm was assigned to be 4^I15/2-^4I13/2 transition of Er^3＋. The ultraviolet visible absorption spectra of Er （Pc） （DBM） were similar to the ultraviolet visible absorption spectra of Er（Pc）2.The Q band was red-shifted by 11 nm to 672 nm and B band was red-shifted by 24 nm to 342 nm. It was found that the intensity of the emission at 1 530 nm was enhanced with the increasing asymmetry of molecular structure of the complexes,as shown in the photoluminescence spectra of Er（Pc）（DBM）. The increasing asymmetry of the ligand field where Er^3＋ located resulted in the increasing probability of 4f-4f transition which was,in principle,a parity-forbidden process. This caused the intensity of the emission at 1 530 nm,as shown in the Nearinfrared photoluminescence spectra. The emission at 1 530 nm corresponded to 4^I15/2- ^4I13/2 transition of Er^3＋ in the Near-infrared photoluminescence spectra.