Study on Raman spectra of two expansins in pure solid-phase and in water solutions

作者：Zhou, Luo; Zhong, Xianqiong^*; Long, Hongqiao; Qin, Jiajun; Li, Chengwei; Lin, Jiang

来源：Optik, 2018, 166: 56-60.

DOI：10.1016/j.ijleo.2018.04.013

• Fingerprint Raman spectra
• Expansin
• KT-30
• DA-6

The Raman spectra of two kinds of expansins KT-30 and DA-6 are measured and analyzed in the cases of pure solid-phase and in water solutions. The results show that, KT-30 has much richer and narrower Raman spectral peaks. The first, second, and third strong Raman peaks are respectively located 990.68738 cm(-1), 1606.0975 cm(-1), and 1327.9379 cm(-1). Besides the dense and narrow Raman peaks below 1800 cm(-1), there exist three weak peaks within 3050-3410 cm(-1). In comparison, fewer spectral peaks can be observed for DA-6. The first and second strong peaks respectively appear at 2883.03760 cm(-1) and 2848.4480 cm(-1). There exist about 8 peaks below 1500 cm(-1). In water solutions, bell-shaped and homogeneous fluorescence background will respectively superpose on the Raman spectra of KT-30 and DA-6 within 100-2500 cm(-1) and 400-4000 cm(-1). Parts of spectral peaks will be covered accordingly. Moreover, the peak position shifts of KT-30 are very slight. While DA-6 takes the opposite. Its largest shift can even be up to 63.4148 cm(-1). The results can supply important fingerprint data for Raman detection of expansins in fruits and vegetables.

• 出版日期2018
• 单位成都信息工程大学