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Li Y, Sun Y, Li Q, Lei J, Yang B, Shen Y, Cai Y, Deng X. Study of temperature-dependent terahertz spectra of isonicotinamide in the form I using the quasi-harmonic approximation. Chemphyschem 2022; 23:e202100849. [PMID: 35098625 DOI: 10.1002/cphc.202100849] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/20/2022] [Indexed: 11/08/2022]
Abstract
Anharmonicity of molecular vibrational motions is closely associated with the thermal property of crystals. However, the origin of anharmonicity is still not fully understood. Low-frequency vibrations, which are usually defined in the terahertz (THz) range, show excellent sensitivity to anharmonicity. In this work, anharmonicity of isonicotinamide in the form I was investigated by using temperature-dependent terahertz time-domain spectroscopy and quasi-harmonic approximation (QHA) approach at PBE-D3 and PBE-MBD levels. Both DFT calculations suggest the variation of p-p stacking conformation dominates in the thermal expansion of unit cell. The frequency shifts of the modes in THz range obtained by QHA approach are found to be qualitatively consistent with the observation, demonstrating QHA approach is a useful tool for the interpretation of frequency shifts of modes induced by temperature.
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Affiliation(s)
- Yin Li
- Nanchang University, Department of Physics, Nanchang, CHINA
| | - Yiwen Sun
- Shenzhen University, School of Biomedical Engineering, Shenzhen, CHINA
| | - Qiqi Li
- Shenzhen University, School of Biomedical Engineering, Shenzhen, CHINA
| | - Jiangtao Lei
- Nanchang University, Institute of Space Science and Technology, Nanchang, CHINA
| | - Bo Yang
- Nanchang University, Department of Materials and Chemicals, Nanchang, CHINA
| | - Yun Shen
- Nanchang University, Department of Physics, Nanchang, CHINA
| | - Yingxiang Cai
- Nanchang University, Department of Physics, Nanchang, CHINA
| | - Xiaohua Deng
- Nanchang University, department of physics, Xuefu Avenue 999, Nanchang City, Jiangxi Province, 330031, Nanchang, CHINA
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Swinarew AS, Swinarew B, Gabor J, Popczyk M, Kubik K, Stanula A, Waśkiewicz Z, Rosemann T, Knechtle B. New Kind of Polymer Materials Based on Selected Complexing Star-Shaped Polyethers. Polymers (Basel) 2019; 11:polym11101554. [PMID: 31554275 PMCID: PMC6835609 DOI: 10.3390/polym11101554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 09/15/2019] [Accepted: 09/21/2019] [Indexed: 12/07/2022] Open
Abstract
In today’s analytical trends, there is an ever-increasing importance of polymeric materials for low molecular weight compounds including amines and drugs because they can act as carriers or capture amines or drugs. The use of this type of materials will allow the development of modern materials for the chromatographic column beds and the substrates of selective sensors. Moreover, these kinds of materials could be used as a drug carrier. Therefore, the aim of this study is presenting the synthesis and complexing properties of star-shaped oxiranes as a new sensor for the selective complexation of low molecular weight compounds. Propylene oxide and selected oxirane monomers with carbazolyl in the substituent were selected as the monomers in this case and tetrahydrofuran as its solvent. The obtained polymer structures were characterized using the MALDI-TOF. It was found that in the initiation step potassium hydride deprotonates the monomer molecule and takes also part in the nucleophilic substitution. The resulting polymeric material preferably cross-linked with selected di-oxiranes (1,2,7,8-diepoksyoktan in respect ratio 3:1 according to active center) was then used as a stationary phase in the column and thin layer chromatography for amine separation and identification. Sorption ability of the resulting deposits was determined using a quartz microbalance (QCMB). The study was carried out in stationary mode and flow cells to simulate actual operating phase conditions. Based on changes in electrode vibration frequency, the maximum amount of adsorbed analyte and the best conditions for its sorption were determined.
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Affiliation(s)
- Andrzej Szymon Swinarew
- Institute of Materials Science, Faculty of Computer Science and Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
| | - Beata Swinarew
- Institute for Engineering of Polymer Materials & Dyes, Paint & Plastics Department; Chorzowska 50a, 44-100 Gliwice, Poland.
| | - Jadwiga Gabor
- Institute of Materials Science, Faculty of Computer Science and Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
| | - Magdalena Popczyk
- Institute of Materials Science, Faculty of Computer Science and Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
| | - Klaudia Kubik
- Institute of Materials Science, Faculty of Computer Science and Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
| | - Arkadiusz Stanula
- Institute of Sport Science, Department of Exercise and Sport Performance, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland.
| | - Zbigniew Waśkiewicz
- Institute of Sport Science, Department of Team Sport Games, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland.
- Department of Sports Medicine and Medical Rehabilitation, Sechenov University, Moscow 119991, Russia.
| | - Thomas Rosemann
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland.
| | - Beat Knechtle
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland.
- Medbase St. Gallen Am Vadianplatz, 9001 St. Gallen, Switzerland.
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Csepregi R, Lemli B, Kunsági-Máté S, Szente L, Kőszegi T, Németi B, Poór M. Complex Formation of Resorufin and Resazurin with Β-Cyclodextrins: Can Cyclodextrins Interfere with a Resazurin Cell Viability Assay? Molecules 2018; 23:molecules23020382. [PMID: 29439432 PMCID: PMC6017802 DOI: 10.3390/molecules23020382] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 02/07/2018] [Accepted: 02/08/2018] [Indexed: 01/15/2023] Open
Abstract
Resazurin (or Alamar Blue) is a poorly fluorescent dye. During the cellular reduction of resazurin, its highly fluorescent product resorufin is formed. Resazurin assay is a commonly applied method to investigate viability of bacterial and mammalian cells. In this study, the interaction of resazurin and resorufin with β-cyclodextrins was investigated employing spectroscopic and molecular modeling studies. Furthermore, the influence of β-cyclodextrins on resazurin-based cell viability assay was also tested. Both resazurin and resorufin form stable complexes with the examined β-cyclodextrins (2.0–3.1 × 103 and 1.3–1.8 × 103 L/mol were determined as binding constants, respectively). Cells were incubated for 30 and 120 min and treated with resazurin and/or β-cyclodextrins. Our results suggest that cyclodextrins are able to interfere with the resazurin-based cell viability assay that presumably results from the following mechanisms: (1) inhibition of the cellular uptake of resazurin and (2) enhancement of the fluorescence signal of the formed resorufin.
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Affiliation(s)
- Rita Csepregi
- Department of Laboratory Medicine, University of Pécs, Medical School, Pécs H-7624, Hungary; (R.C.); (T.K.)
- János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary; (B.L.); (S.K.-M.)
| | - Beáta Lemli
- János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary; (B.L.); (S.K.-M.)
- Department of General and Physical Chemistry, University of Pécs, Pécs H-7624, Hungary
- Department of Pharmaceutical Chemistry, University of Pécs, Faculty of Pharmacy, Pécs H-7624, Hungary
| | - Sándor Kunsági-Máté
- János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary; (B.L.); (S.K.-M.)
- Department of General and Physical Chemistry, University of Pécs, Pécs H-7624, Hungary
- Department of Pharmaceutical Chemistry, University of Pécs, Faculty of Pharmacy, Pécs H-7624, Hungary
| | - Lajos Szente
- CycloLab Cyclodextrin Research & Development Laboratory, Ltd., Budapest H-1097, Hungary;
| | - Tamás Kőszegi
- Department of Laboratory Medicine, University of Pécs, Medical School, Pécs H-7624, Hungary; (R.C.); (T.K.)
- János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary; (B.L.); (S.K.-M.)
| | - Balázs Németi
- Department of Pharmacology, University of Pécs, Faculty of Pharmacy, Pécs H-7624, Hungary;
| | - Miklós Poór
- János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary; (B.L.); (S.K.-M.)
- Department of Pharmacology, University of Pécs, Faculty of Pharmacy, Pécs H-7624, Hungary;
- Correspondence: ; Tel.: +36-72-536-000 (ext. 31646)
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Poór M, Zand A, Szente L, Lemli B, Kunsági-Máté S. Interaction of α- and β-zearalenols with β-cyclodextrins. Molecules 2017; 22:molecules22111910. [PMID: 29113131 PMCID: PMC6150337 DOI: 10.3390/molecules22111910] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/03/2017] [Accepted: 11/03/2017] [Indexed: 12/13/2022] Open
Abstract
Zearalenone (ZEN) is a mycotoxin produced by Fusarium fungi. ZEN primarily contaminates different cereals, and exerts a strong xenoestrogenic effect in animals and humans. ZEN is a fluorescent mycotoxin, although molecular interactions and microenvironmental changes significantly modify its spectral properties. During biotransformation, ZEN is converted into α-zearalenol (α-ZOL) and β-zearalenol (β-ZOL), the toxic metabolites of ZEN, which mimick the effect of estrogen. Cyclodextrins (CDs) are host molecules, and have been studied extensively; they can form stable complexes with several mycotoxins, including ZEN. However, information is limited regarding the interactions of CDs with ZOLs. Therefore, we studied the interactions of α- and β-ZOLs with native and six chemically modified β-CDs by fluorescence spectroscopy. Fluorescence enhancement during complex formation, as well as binding constants, were determined. To understand ZOL-CD interactions better, molecular modeling studies were also carried out. Both mycotoxin derivatives formed the most stable complexes with methylated and sulfobutylated CD-derivatives; however, the CD complexes of α-ZOL were significantly stronger than those of β-ZOL. The data presented here indicate which of the chemically modified β-CDs appear more suitable as fluorescence enhancers or as potential mycotoxin binders.
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Affiliation(s)
- Miklós Poór
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary.
- János Szentágothai Research Center, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary.
| | - Afshin Zand
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary.
| | - Lajos Szente
- CycloLab Cyclodextrin Research & Development Laboratory, Ltd., Illatos út 7, H-1097 Budapest, Hungary.
| | - Beáta Lemli
- János Szentágothai Research Center, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary.
- Department of General and Physical Chemistry, University of Pécs, Ifjúság útja 6, H-7624 Pécs, Hungary.
| | - Sándor Kunsági-Máté
- János Szentágothai Research Center, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary.
- Department of General and Physical Chemistry, University of Pécs, Ifjúság útja 6, H-7624 Pécs, Hungary.
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Secenji G, Matisz G, Csók Z, Kollár L, Kunsági-Máté S. Temperature-dependent fluorescence quenching of a cavitand derivative by copper ions. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.05.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Patil DR, Chandam DR, Mulik AG, Jagdale SD, Patil PP, Deshmukh MB. Synthesis and Cation Recognition Study of Novel Benzo Crown Ether Functionalized Enamine Derivatives. SYNTHETIC COMMUN 2015. [DOI: 10.1080/00397911.2015.1053146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Dayanand R. Patil
- Department of Chemistry, Shivaji University, Vidyanagar, Kolhapur, India
| | | | - Abhijeet G. Mulik
- Department of Chemistry, Shivaji University, Vidyanagar, Kolhapur, India
| | | | - Prasad P. Patil
- Department of Chemistry, Shivaji University, Vidyanagar, Kolhapur, India
- Department of Agrochemicals and Pest Management, Shivaji University, Vidyanagar, Kolhapur, India
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Zhang L, Chen S, Zhao Q, Huang H. Carbon dots as a fluorescent probe for label-free detection of physiological potassium level in human serum and red blood cells. Anal Chim Acta 2015; 880:130-5. [DOI: 10.1016/j.aca.2015.04.057] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 04/21/2015] [Accepted: 04/25/2015] [Indexed: 10/23/2022]
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Li Y, Huszthy P, Móczár I, Szemenyei B, Kunsági-Máté S. Solvent effect on the complex formation of a crown ether derivative with sodium and potassium ions. Thermodynamic background of selectivity. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.11.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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