第五章紫外可见吸收光谱分析 1.特征谱基础 (1)分子总能量与能级结构 (2)分子轨道与电子能级 2.电磁辐射与材料的相互作用 (1)紫外、可见（吸收）光谱 (2)分子荧光、磷光光谱 3.紫外可见吸收光谱法之基本原理
1 第五章 紫外可见吸收光谱分析 1. 特征谱基础 （1）分子总能量与能级结构 （2）分子轨道与电子能级 2. 电磁辐射与材料的相互作用 （1）紫外、可见（吸收）光谱 （2）分子荧光、磷光光谱 3. 紫外可见吸收光谱法 之 基本原理
Nature Materials 2012;11:58 Whereas significant achievements have been made in visible persistent phosphors (长余每)，the research and development of persistent phosphors in the NIR region (700-2,500nm,近g外)are lacking,even though there are growing demands for applications as taggants(示踪)in night- vision surveillance（(监y)and as optical probes in bioimaging
Nature Materials 2012;11:58 2 Whereas significant achievements have been made in visible persistent phosphors （长余辉）, the research and development of persistent phosphors in the NIR region (700-2,500 nm，近红外区) are lacking, even though there are growing demands for applications as taggants（示踪物）in nightvision surveillance （监测） and as optical probes in bioimaging
b 1234 6 10s 1min 5min 5min 5min 5min Direct sunlight 400 nm 495 nm 590nm 5min Excited in air Excited in salt water b d 5h e 1785 24h f 120h Nature Materials g 2012;11:58 240h h Zn3Ga2Ge2010:0.5%Cr3+ 360h
3 Nature Materials 2012;11:58 Zn3Ga2Ge2O10: 0.5%Cr3+
】 ● ③ ② 4T(te2) ④ ⑥ 4T(t2e) ⑦ 4T2/2E Electron traps ⑤ ① AA2 Cr3+
4
回顾 第一节 概述 辐射的吸收与发射 辐射的散射 光电离 5
5 回顾 第一节 概述 辐射的吸收与发射 辐射的散射 光电离