Citation: Pan An, Cheng-Qian Yuan, Xian-Hu Liu, De-Bao Xiao, Zhi-Xun Luo. Vibrational spectroscopic identification of isoprene, pinenes and their mixture[J]. Chinese Chemical Letters, ;2016, 27(4): 527-534. shu

Vibrational spectroscopic identification of isoprene, pinenes and their mixture

Pan An ^a,b, ,
Cheng-Qian Yuan ^a ,
Xian-Hu Liu ^a ,
De-Bao Xiao ^b,c ,
Zhi-Xun Luo ^a

a Beijing National Laboratory for Molecular Sciences(BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
b School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China;
c Institute of Advanced Materials(IAM), Nanjing Technology University, Nanjing 210046, China

Received Date: 7 December 2015
Revised Date: 5 January 2016

Fund Project: This work is supported by Young Professionals Program in Institute of Chemistry, Chinese Academy of Sciences (No. Y3297B1261). Also we thank the national Thousand Youth Talents Program and financial support from CAS project (Nos. Y31M0112C1 and Y5294512C1).

Here we show a study of vibrational spectroscopic identification of a few typical organic compounds which are known as the main sources of organic aerosols (OAs) particle matter in air pollution. Raman and IR spectra of isoprene, terpenoids, pinenes and their mixture are meticulously examined, showing distinguishable intrinsic vibrational spectroscopic fingerprints for these chemicals, respectively. As a reference, first-principles calculations of Raman and infrared activities are also conducted. It is interestingly found that, the experimental spectra are peak-to-peak consistent with the DFT (Density Functional Theory)-calculated vibrational activities. Also found is that, in a certain case such as for β-pinene, a dimer model, rather than an isolated single molecular model, reproduces the experimental results, indicating unneglected intermolecular interactions. Starting with this study, we are endeavoring to advocate a database of Raman/IR fingerprint spectra for OA haze identification.
- Organic aerosol,
- Raman,
- IR,
- Isoprene,
- Terpenoids,
- Pinenes
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