Infrared Spectrum and Thermodynamic Studies of Catechin-Black Rice Anthocyanin Complex

Ying XIANG; An-di FENG; Zheng-zhuo ZHAO; Cong-dan SUN; Hao-peng XU; Li-na SUN; Feng-ying XIE

doi:10.3964/j.issn.1000-0593(2020)11-3416-04

Journals >Spectroscopy and Spectral Analysis >Volume 40 >Issue 11 >Page 3416 > Article

Spectroscopy and Spectral Analysis
Vol. 40, Issue 11, 3416 (2020)

Infrared Spectrum and Thermodynamic Studies of Catechin-Black Rice Anthocyanin Complex

Ying XIANG^1、1, An-di FENG^1、1, Zheng-zhuo ZHAO^1、1, Cong-dan SUN^1、1, Hao-peng XU^1、1, Li-na SUN^1、1, and Feng-ying XIE^1、1

Author Affiliations

¹[in Chinese]

¹1. College of Food Science, Northeast Agricultural University, Harbin 150030, China

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DOI: 10.3964/j.issn.1000-0593(2020)11-3416-04 Cite this Article

Ying XIANG, An-di FENG, Zheng-zhuo ZHAO, Cong-dan SUN, Hao-peng XU, Li-na SUN, Feng-ying XIE. Infrared Spectrum and Thermodynamic Studies of Catechin-Black Rice Anthocyanin Complex[J]. Spectroscopy and Spectral Analysis, 2020, 40(11): 3416 Copy Citation Text

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Fig. 1. Synthetic pathway of catechin-anthocyanin complex mediated by acetaldehyde

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Fig. 2. Infrared spectra of Catechin-black rice anthocyanin complex

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波数/cm^-1	峰位指认	结构信息
3 650~3 200	—OH伸缩振动	判断有无醇类、酚类和有机酸的重要依据
3 300~2 800	C—H伸缩振动	不饱和C—H出现在3 000 cm^-1以上; 饱和C—H出现在3 000 cm^-1以下
1 850~1 600	—C=O伸缩振动	酮类、酸类、酯类及酸酐的特征吸收峰
1 680~1 540	C=C伸缩振动	吸收峰较弱, 但对称性较高。通常在1 600和1 500 cm^-1附近有2~4个吸收峰, 为苯环的骨架振动
1460±10	—CH₃反对称变形, —CH₂变形振动	有机化合物结构中—CH₃、 —CH₂基团
1 370~1 380	—CH₃对称变形振动	有机化合物结构中—CH₃基团
1 300~1 000	C—O伸缩振动	C—O键(酯、醚、醇类)的极性很强, 故常成为谱图中最强的吸收
900~650	面内外弯曲振动	用于顺反式结构、取代类型的确定

Table 1. Characteristic peaks of infrared spectra of catechin-black rice anthocyanin complex

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序号	T/℃	ΔH/(kJ·mol^-1)	ΔG/(kJ·mol^-1)	ΔS/(J·mol^-1)
1	40	17.69±0.28^a	90.46±0.87^a	-232.48±1.87^a
2	50	17.60±0.88^a	92.19±0.13^ab	-230.93±2.31^a
3	60	17.52±0.14^a	94.02±1.58^b	-229.73±4.33^a
4	70	17.44±0.41^a	96.49±1.09^c	-230.47±1.40^a
5	80	17.36±0.45^a	99.21±0.06^d	-231.87±1.12^a

Table 2. Thermodynamic parameters of Catechin-black rice anthocyanin complex

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