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An Z, Zhang JM, Lv MY, Li XQ, Wu L, Shang HB, Li D. Light-Driven Polarity Switching of the Chromatographic Stationary Phase with Photoreversibility. Anal Chem 2021; 93:17051-17059. [PMID: 34894658 DOI: 10.1021/acs.analchem.1c03822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Regrettably, conventional chromatographic columns have immutable polarity, resulting in requirements of at least two columns with polarity difference and sophisticated mechanical switching valves, which hinders the development of "micro-smart" multidimensional tandem chromatography. In this work, light-driven polarity switching was realized in a single capillary column based on the reversible trans-cis isomerization of 4-[3-(triethoxysilyl)propoxy]azobenzene as the stationary phase under light irradiation, with the change in dipole moment. As a result, the stationary phase offers precise and dynamic control of polarity based on the cis-trans azobenzene ratio, which depends on irradiation wavelength and time. Thus, the continuous adjustment of polarity enables diversified chromatographic separation modes, for example, step-polarity gradient and polarity-conversion separation modes, taking advantage of the superior freedom of polarity switching in time and spatial dimensions. The photosensitive column also shows good reproducibility of polarity photoreversibility and high separation efficiency. The present study might offer brand new insight into developing miniaturization and intellectualization of multidimensional chromatography via designing smart responsive switching valves or stationary phases, besides mechanical means.
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Affiliation(s)
- Zhengjiu An
- Interdisciplinary Program of Biological Functional Molecules, College of Integration Science, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China
| | - Jie-Min Zhang
- Interdisciplinary Program of Biological Functional Molecules, College of Integration Science, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China
| | - Ming-Yu Lv
- Interdisciplinary Program of Biological Functional Molecules, College of Integration Science, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China
| | - Xin-Qi Li
- Interdisciplinary Program of Biological Functional Molecules, College of Integration Science, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Hai-Bo Shang
- Interdisciplinary Program of Biological Functional Molecules, College of Integration Science, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China.,Department of Chemistry, National Demonstration Centre for Experimental Chemistry Education, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China
| | - Donghao Li
- Interdisciplinary Program of Biological Functional Molecules, College of Integration Science, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China.,Department of Chemistry, National Demonstration Centre for Experimental Chemistry Education, Yanbian University, Park Road 977, Yanji City 133002, Jilin Province, China
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Silica- and germania-based dual-ligand sol-gel organic-inorganic hybrid sorbents combining superhydrophobicity and π-π interaction. The role of inorganic substrate in sol-gel capillary microextraction. Anal Chim Acta 2017; 964:96-111. [DOI: 10.1016/j.aca.2017.02.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 02/22/2017] [Accepted: 02/27/2017] [Indexed: 11/22/2022]
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