| 苯丙氨酸取代的丝氨酸八聚体离子的红外光解离光谱及其在手性分析中的应用 |
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| 基金项目:国家自然科学基金项目（21627801，21475065） |
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| 中文摘要:通过电喷雾电离的方法，结合质谱-红外解离光谱技术对苯丙氨酸取代的丝氨酸八聚体团簇离子的红外解离光谱手性效应进行了研究，获得了相应的团簇离子在2 700~3 600 cm-1 的红外解离光谱。实验结果显示，苯丙氨酸取代的丝氨酸八聚体团簇离子均存在明显的同手性优势。通过比较相应红外解离光谱图的差异或在特定波长处的红外解离质谱均可实现苯丙氨酸单元的手性区分。 |
| 中文关键词:电喷雾电离 红外解离光谱；手性区分；苯丙氨酸；丝氨酸八聚体 |
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| Study on Phenylalanine Substituted Serine Octamer Ions by Infrared Photodissociation Spectroscopy and Their Application in Chiral Differentiation |
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| Abstract:A method of infrared photodissociation（IRPD）spectroscopy was developed for the determination of phenylalanine substituted L serine octamer ions.The phenylalanine substituted L serine octamer ions were generated by electrospray ionization（ESI）and studied by mass spectrometry（MS）coupled with infrared photodissociation（IRPD）spectroscopy.Chiral preference was found existing in such cluster ions.IRPD experiments showed that the ions of ［L Ser7+L/D Phe1］H+ and ［L Ser6+L/D Phe2］H+ were observed in the range of 2 700-3 600 cm-1.Chiral differentiation was fulfilled by comparing their IRPD spectra or IRPD mass spectra obtained at some special wavenumbers. |
| Key Words:electrospray ionization（ESI） infrared photodissociation（IRPD）spectroscopy chiral differentiation phenylalanine serine octamer |
| 引用本文：任娟，马媛，李树奇，孔祥蕾.苯丙氨酸取代的丝氨酸八聚体离子的红外光解离光谱及其在手性分析中的应用[J].分析测试学报,2018,37(10):1269-1273. |
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