Jin Shaoqing, Fan Fengtao, Guo Meiling, Zhang Ying, Feng Zhaochi, Li Can
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Rev Sci Instrum. 2014 Apr;85(4):046105. doi: 10.1063/1.4870444.
Deep UV Raman spectrograph with the laser excitation line down to 177.3 nm was developed in this laboratory. An ellipsoidal mirror and a dispersed-subtractive triple monochromator were used to collect and disperse Raman light, respectively. The triple monochromator was arranged in a triangular configuration with only six mirrors used. 177.3 nm laser excited Raman spectrum with cut-off wavenumber down to 200 cm(-1) and spectral resolution of 8.0 cm(-1) can be obtained under the condition of high purity N2 purging. With the C-C σ bond in Teflon selectively excited by the 177.3 nm laser, resonance Raman spectrum of Teflon with good quality was recorded on the home-built instrument and the σ-σ(*) transition of C-C bond was studied. The result demonstrates that deep UV Raman spectrograph is powerful for studying the systems with electronic transition located in the deep UV region.
本实验室研制了激光激发线低至177.3 nm的深紫外拉曼光谱仪。分别使用一个椭球面镜和一个色散-减法型三联单色仪来收集和色散拉曼光。三联单色仪采用三角形配置，仅使用了六面镜子。在高纯度氮气吹扫的条件下，可获得截止波数低至200 cm⁻¹且光谱分辨率为8.0 cm⁻¹的177.3 nm激光激发拉曼光谱。利用177.3 nm激光选择性激发聚四氟乙烯中的C-C σ键，在自制仪器上记录了聚四氟乙烯的高质量共振拉曼光谱，并对C-C键的σ-σ*跃迁进行了研究。结果表明，深紫外拉曼光谱仪对于研究电子跃迁位于深紫外区域的体系具有强大的功能。
