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Huynh HT, Tsai ST, Hsu PJ, Biswas A, Phan HT, Kuo JL, Ni CK, Chiu CC. Collision-induced dissociation of Na +-tagged ketohexoses: experimental and computational studies on fructose. Phys Chem Chem Phys 2022; 24:20856-20866. [PMID: 36043336 DOI: 10.1039/d2cp02313j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Collision-induced dissociation tandem mass spectrometry (CID-MSn) and computational investigation at the MP2/6-311+G(d,p) level of theory have been employed to study Na+-tagged fructose, an example of a ketohexose featuring four cyclic isomers: α-fructofuranose (αFruf), β-fructofuranose (βFruf), α-fructopyranose (αFrup), and β-fructopyranose (βFrup). The four isomers can be separated by high-performance liquid chromatography (HPLC) and they show different mass spectra, indicating that CID-MSn can distinguish the different fructose forms. Based on a simulation using a micro-kinetic model, we have obtained an overview of the mechanisms for the different dissociation pathways. It has been demonstrated that the preference for the C-C cleavage over the competing isomerization of linear fructose is the main reason for the previously reported differences between the CID-MS spectra of aldohexoses and ketohexoses. In addition, the kinetic modeling helped to confirm the assignment of the different measured mass spectra to the different fructose isomers. The previously reported assignment based on the peak intensities in the HPLC chromatogram had left some open questions as the preference for the dehydration channels did not always follow trends previously observed for aldohexoses. Setting up the kinetic model further enabled us to directly compare the computational and experimental results, which indicated that the model can reproduce most trends in the differences between the dissociation pathways of the four cyclic fructose isomers.
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Affiliation(s)
- Hai Thi Huynh
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan. .,Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan.,Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Shang-Ting Tsai
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan. .,Department of Applied Chemistry, National Chiayi University, Chiayi, 60004, Taiwan
| | - Po-Jen Hsu
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan.
| | - Anik Biswas
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan. .,Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Huu Trong Phan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan. .,Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan.,Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan. .,Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan.,Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan.,International Graduate Program of Molecular Science and Technology (NTU-MST), National Taiwan University, Taipei, 10617, Taiwan
| | - Chi-Kung Ni
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan. .,Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan.,Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Cheng-Chau Chiu
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan. .,Center for Theoretical and Computational Physics, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
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Dielectric Spectroscopy in Biomaterials: Agrophysics. MATERIALS 2016; 9:ma9050310. [PMID: 28773438 PMCID: PMC5503049 DOI: 10.3390/ma9050310] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/18/2016] [Accepted: 04/20/2016] [Indexed: 11/17/2022]
Abstract
Being dependent on temperature and frequency, dielectric properties are related to various types of food. Predicting multiple physical characteristics of agri-food products has been the main objective of non-destructive assessment possibilities executed in many studies on horticultural products and food materials. This review manipulates the basic fundamentals of dielectric properties with their concepts and principles. The different factors affecting the behavior of dielectric properties have been dissected, and applications executed on different products seeking the characterization of a diversity of chemical and physical properties are all pointed out and referenced with their conclusions. Throughout the review, a detailed description of the various adopted measurement techniques and the mostly popular equipment are presented. This compiled review serves in coming out with an updated reference for the dielectric properties of spectroscopy that are applied in the agrophysics field.
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