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Liu Y, Hou S, Chen T, Li Y, Zhang M, Zhou D, Xu H. Micro-matrix cartridge extraction followed by online micro-solid phase extraction based on polystyrene@hydroxypropyl-β-cyclodextrin nanofibers for selective determination of fipronil and its metabolites in soil. Mikrochim Acta 2023; 190:138. [PMID: 36920543 DOI: 10.1007/s00604-023-05714-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/21/2023] [Indexed: 03/16/2023]
Abstract
Micro-matrix cartridge extraction coupled on-line to micro-solid phase extraction-high performance liquid chromatography-mass spectrometry (μ-MCE-online-μ-SPE-HPLC-MS) is presented. Micro-matrix cartridge extraction (μ-MCE) was applied to highly efficient desorption of adsorbed pesticides from contaminated soil with favorable extraction efficiency (100%). Novel polystyrene@hydroxypropyl-β-cyclodextrin (PS@HPCD) electrospun nanofibers with 3D network structure were prepared to selectively capture fipronil and its metabolites. High selectivity was obtained with adsorption efficiency ≥ 86.64% via complexation, hydrophobic affinity, and π-π interactions. PS@HPCD nanofibers exhibited remarkable advantages such as excellent enrichment factors (24-55), superior permeability, and long service life (> 65 times). Under the optimum conditions, wide linear range (0.1-1000 ng g-1), low detection limits (0.0032-0.0067 ng g-1), high recoveries (84-124.5%), favorable repeatability (RSD ≤ 10.4%, n = 5), and reproducibility (RSD ≤ 7.2%, n = 3) were acquired for fipronil and three metabolites. The developed method was applied to the pesticide determination in actual soils and the ISO-certified soil with satisfactory recoveries (96.5%). The method developed provides a green, efficient, and miniaturized method for the determination of trace pesticide residues in soil.
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Affiliation(s)
- Ying Liu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Shenghuai Hou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Tiantian Chen
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Yan Li
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Manlin Zhang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Dandan Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Hui Xu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China.
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Aikawa S, Tanaka H, Ueda H, Maruyama M, Higaki K. Formation of a Stable Co-Amorphous System for a Brick Dust Molecule by Utilizing Sodium Taurocholate with High Glass Transition Temperature. Pharmaceutics 2022; 15:84. [PMID: 36678713 PMCID: PMC9864160 DOI: 10.3390/pharmaceutics15010084] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022] Open
Abstract
Brick dust molecules are usually poorly soluble in water and lipoidal components, making it difficult to formulate them in dosage forms that provide efficient pharmacological effects. A co-amorphous system is an effective strategy to resolve these issues. However, their glass transition temperatures (Tg) are relatively lower than those of polymeric amorphous solid dispersions, suggesting the instability of the co-amorphous system. This study aimed to formulate a stable co-amorphous system for brick dust molecules by utilizing sodium taurocholate (NaTC) with a higher Tg. A novel neuropeptide Y5 receptor antagonist (AntiY5R) and NaTC with Tg of 155 °C were used as the brick dust model and coformer, respectively. Ball milling formed a co-amorphous system for AntiY5R and NaTC (AntiY5R-NaTC) at various molar ratios. Deviation from the theoretical Tg value and peak shifts in Fourier-transform infrared spectroscopy indicated intermolecular interactions between AntiY5R and NaTC. AntiY5R-NaTC at equal molar ratios resulting in an 8.5-fold increase in AntiY5R solubility over its crystalline form. The co-amorphous system remained amorphous for 1 month at 25 °C and 40 °C. These results suggest that the co-amorphous system formed by utilizing NaTC as a coformer could stably maintain the amorphous state and enhance the solubility of brick dust molecules.
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Affiliation(s)
- Shohei Aikawa
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
- Formulation Research Department, Formulation R&D Laboratory, Shionogi & Co., Ltd., Hyogo 660-0813, Japan
| | - Hironori Tanaka
- Formulation Research Department, Formulation R&D Laboratory, Shionogi & Co., Ltd., Hyogo 660-0813, Japan
| | - Hiroshi Ueda
- Bioanalytical, Analysis and Evaluation Laboratory, Shionogi & Co., Ltd., Osaka 561-0825, Japan
| | - Masato Maruyama
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
| | - Kazutaka Higaki
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
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3
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Nguyen OT, Nguyen TD, Quang TH, Huy TH, Trang PQ, Sy DT. A bimetallic‐catalyzed oxidative esterification reaction forming α‐acyloxy ether. Chem Eng Technol 2022. [DOI: 10.1002/ceat.202100634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Oanh T.K. Nguyen
- Institute of Applied Technology and Sustainable Development Nguyen Tat Thanh University 298A-300A Nguyen Tat Thanh Street, Ward 13, District 4 Ho Chi Minh City 700000 Vietnam
| | - Trinh Duy Nguyen
- Institute of Applied Technology and Sustainable Development Nguyen Tat Thanh University 298A-300A Nguyen Tat Thanh Street, Ward 13, District 4 Ho Chi Minh City 700000 Vietnam
| | - Tran Huu Quang
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay District Ha Noi City 10072 Vietnam
| | - Tran Huu Huy
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay District Ha Noi City 10072 Vietnam
| | - Pham Quynh Trang
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay District Ha Noi City 10072 Vietnam
| | - Do Trung Sy
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay District Ha Noi City 10072 Vietnam
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Yang H, Yue H, Zhao X, Song M, Guo J, Cui Y, Fernández-Blázquez JP, Wang DY. Polycarbonate/Sulfonamide Composites with Ultralow Contents of Halogen-Free Flame Retardant and Desirable Compatibility. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3656. [PMID: 32824969 PMCID: PMC7503750 DOI: 10.3390/ma13173656] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/05/2020] [Accepted: 08/11/2020] [Indexed: 06/02/2023]
Abstract
A novel halogen-free flame retardant containing sulfonamide, 1,3,5,7-tetrakis (phenyl-4-sulfonamide) adamantane (FRSN) was synthesized and used for improving the flame retardancy of largely used polycarbonate (PC). The flame-retardant properties of the composites with incorporation of varied amounts of FRSN were analyzed by techniques including limited oxygen index, UL 94 vertical burning, and cone calorimeter tests. The new FR system with sulfur and nitrogen elements showed effective improvements in PC's flame retardancy: the LOI value of the modified PC increased significantly, smoke emission suppressed, and UL 94 V-0 achieved. Typically, the composite with only 0.08 wt% of FRSN added (an ultralow content) can increase the limiting oxygen index (LOI) value to 33.7% and classified as UL 94 V-0 rating. Furthermore, the mechanical properties and SEM morphology indicated that the FRSN has very good compatibility with PC matrix, which, in turn, is beneficial to the property enhancement. Finally, the analysis of sample residues after burning tests showed that a high portion of char was formed, contributing to the PC burning protection. This synthesized flame retardant provides a new way of improving PC's flame retardancy and its mechanical property.
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Affiliation(s)
- Hangfeng Yang
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China; (H.Y.); (X.Z.); (M.S.); (Y.C.)
| | - Hangbo Yue
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China; (H.Y.); (X.Z.); (M.S.); (Y.C.)
- Guangzhou Vocational and Technical University of Science and Technology, Guangzhou 510550, China
| | - Xi Zhao
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China; (H.Y.); (X.Z.); (M.S.); (Y.C.)
| | - Minzimo Song
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China; (H.Y.); (X.Z.); (M.S.); (Y.C.)
| | - Jianwei Guo
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China; (H.Y.); (X.Z.); (M.S.); (Y.C.)
| | - Yihua Cui
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China; (H.Y.); (X.Z.); (M.S.); (Y.C.)
| | | | - De-Yi Wang
- IMDEA Materials Institute, c/Eric Kandel 2, 28906 Getafe, Madrid, Spain; (J.P.F.-B.); (D.-Y.W.)
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5
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Devi P, Bishnoi A, Fatma S. Synthesis, Spectroscopic Properties, and Quantum Mechanical Study of 5-Oxo-1-phenyl-4-(piperidin-1-ylmethyl)pyrrolidine-3-carboxylic Acid. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428020030173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Huang L, Zhang X, Shao J, Zhou Z, Chen Y, Hu X. Nanoscale chemical and mechanical heterogeneity of human dentin characterized by AFM-IR and bimodal AFM. J Adv Res 2019; 22:163-171. [PMID: 32055426 PMCID: PMC7005426 DOI: 10.1016/j.jare.2019.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 11/11/2019] [Accepted: 12/27/2019] [Indexed: 12/04/2022] Open
Abstract
AFM-IR technique was used to detect the chemical heterogeneity of human dentin for the first time. The heterogeneity of mechanical properties of human dentin was explored by AFM AM-FM technique. A band at 1336 cm−1 assigned to S
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>O stretching vibrations was found only in peritubular dentin. Peritubular dentin had a higher Young’s modulus (32.25 ± 4.67 GPa) than intertubular dentin. AFM-IR and AFM AM-FM are useful for understanding the mineral deposition mechanisms of dentin.
Human dentin, as an important calcified tissue in the body, plays significant roles in withstanding masticatory forces and has a complex hierarchical organization. Understanding the composition and ultrastructure of dentin is critical for elucidating mechanisms of biomineralization under healthy and pathological states. Here, atomic force microscope infrared spectroscopy (AFM-IR) and AFM-based amplitude modulation-frequency modulation (AM-FM) techniques were utilized to detect the heterogeneity in chemical composition and mechanical properties between peritubular and intertubular dentin at the nanoscale. AFM-IR spectra collected from peritubular and intertubular dentin contained similar vibrational bands in the amide regions (I, II and III), suggesting that collagen may exist in both structures. A distinctive band at 1336 cm−1 indicative of SO stretching vibrations was detected only in peritubular dentin. AFM-IR imaging showed an uneven distribution of chemical components at different locations, confirming the heterogeneity of dentin. The Young’s modulus of peritubular dentin was higher, and was associated to a higher mineral content. This study demonstrated distinctive chemical and mechanical properties of peritubular dentin, implying the different development and mineralization processes between peritubular and intertubular dentin. AFM-IR is useful to provide compositional information on the heterogeneity of human dentin, helping to understand the mineral deposition mechanisms of dentin.
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Affiliation(s)
- Lijia Huang
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, SunYat-sen University, Guangzhou 510000, China.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510000, China
| | - Xiaoyue Zhang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, China.,Micro and Nano Physics and Mechanics Research Laboratory, School of Physics, Sun Yat-sen University, Guangzhou 510275, China
| | - Jian Shao
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, China
| | - Ziyu Zhou
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, SunYat-sen University, Guangzhou 510000, China
| | - Yanan Chen
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, SunYat-sen University, Guangzhou 510000, China
| | - Xiaoli Hu
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, SunYat-sen University, Guangzhou 510000, China.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510000, China
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7
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Shen XR, Zheng H, Pang R, Liu GK, Wu DY, Tian ZQ. Experimental and Theoretical Study of Surface-Enhanced Raman Spectra of Sulfadiazine Adsorbed on Nanoscale Gold Colloids. J Phys Chem A 2019; 123:9199-9208. [DOI: 10.1021/acs.jpca.9b07346] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao-Ru Shen
- State Key Laboratory of Physical Chemistry of Solid Surface, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Hong Zheng
- Department of the Environment & Ecology, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China
| | - Ran Pang
- State Key Laboratory of Physical Chemistry of Solid Surface, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Guo-Kun Liu
- Department of the Environment & Ecology, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China
| | - De-Yin Wu
- State Key Laboratory of Physical Chemistry of Solid Surface, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhong-Qun Tian
- State Key Laboratory of Physical Chemistry of Solid Surface, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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8
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Yurdakul Ş, Temel E, Büyükgüngör O. Crystal structure, spectroscopic characterization, thermal properties and theoretical investigations on [Ag(methyl 4-pyridyl ketone)2NO3]. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.071] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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9
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Michelini LJ, Vaz WF, D'Oliveira GDC, Pérez CN, Napolitano HB. Analysis of two novel 1-4 quinolinone structures with bromine and nitrobenzyl ligands. J Mol Model 2019; 25:55. [PMID: 30734868 DOI: 10.1007/s00894-019-3937-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 01/21/2019] [Indexed: 01/18/2023]
Abstract
The scientific community has shown particular interest in the study of quinolinones-a class of bicyclic organic compounds. An example of these compounds are the 4-quinolinones, considered to be very useful building blocks, since they can adapt their molecular structures with different ligands for applications in various fields such as pharmacy, medicine, physics and engineering. The compounds (E)-3-(benzylidene)-2-(3-nitrophenyl)-2,3-dihydro-1-(phenylsulfonyl)-quinolin-4-(1H)-one (NFQ) and (E)-3-(benzylidene)-2-(4-bromophenyl)-2,3-dihydro-1-(phenylsulfonyl) quinolin-4-(1H)-one (BFQ) were synthesized and characterized by infrared spectroscopy, 1H and 13C NMR, and melting point. NFQ crystallized in the orthorhombic Pbca space group while BFQ appears in the monoclinic P21/n space group. X-ray diffraction was used to evaluate their crystallographic structures, and Hirshfeld surface evaluates the intermolecular interactions, supramolecular arrangement and packaging. Theoretical vibrational assignments and calculated electronic properties also demonstrate acceptable agreement between experimental and theoretical results.
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Affiliation(s)
- Lidiane J Michelini
- Instituto de Química, Universidade Federal de Goiás, Goiânia, GO, Brazil.,Instituto Federal de Ciência, Educação e Tecnologia Goiano, Iporá, GO, Brazil
| | - Wesley F Vaz
- Ciências Exatas e Tecnológicas, Universidade Estadual de Goiás, Anápolis, GO, Brazil
| | | | - Caridad N Pérez
- Instituto de Química, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Hamilton B Napolitano
- Ciências Exatas e Tecnológicas, Universidade Estadual de Goiás, Anápolis, GO, Brazil.
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Yadav T, Mukherjee V. Structural confirmation and spectroscopic study of a biomolecule: Norepinephrine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 202:222-237. [PMID: 29793144 DOI: 10.1016/j.saa.2018.05.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/25/2018] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
The present work deals with the conformational and vibrational spectroscopic study of an important bio-molecule named norepinephrine in gas phase. The FTIR and FTRaman spectrum of norepinephrine in amorphous form were recorded in wavenumber range 4000-400 cm-1 and 4000-50 cm-1 respectively. We have investigated twenty-seven stable conformational structures of norepinephrine molecule. All the calculations have been done using Density Functional Theory with exchange functional B3LYP incorporated with the 6-31++G(d, p) basis set. The effect of hydrochloride on different bond lengths, bond angles and dihedral angles in the most stable conformer has also been studied. The total potential energy distribution for both the most stable conformer and the most stable conformer in hydrochloride was performed with the help Normal coordinate analysis method. Most of the calculated vibrational frequencies are in good agreement with the experimental frequencies. The natural bond orbital analysis was also performed to ensure the stability of electronic structures of norepinephrine. To know chemical reactivity of norepinephrine molecule we have calculated the energy gap between HOMO and LUMO orbitals and it has found above 5 eV in all the conformers.
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Affiliation(s)
- T Yadav
- SUIIT, Sambalpur University, Odisha, India
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Komrovsky F, Sperandeo NR, Vera DMA, Caira MR, Mazzieri MR. X-ray, DFT, FTIR and thermal study of the antimicrobial N-benzenesulfonyl-1H-1,2,3-benzotriazole. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Atilgan A, Yurdakul Ş, Erdogdu Y, Güllüoğlu M. DFT simulation, quantum chemical electronic structure, spectroscopic and structure-activity investigations of 4-acetylpyridine. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.01.080] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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13
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Structural elucidation and physicochemical properties of an organic NLO crystal: 4-Nitrotoluene-2-sulphonic acid dihydrate. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Structural modeling and spectroscopic investigation of isolated and hydrochloride tyramine neurotransmitter. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.140] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Shainyan BA, Chipanina NN, Oznobikhina LP, Meshcheryakov VI. Acid-base properties and supramolecular structure ofN-[(hydroxymethyl)triazolyl]triflamides: DFT, ab initio, and FTIR study. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Bagrat A. Shainyan
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Division of the Russian Academy of Science; 1 Favorsky Street 664033 Irkutsk Russia
| | - Nina N. Chipanina
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Division of the Russian Academy of Science; 1 Favorsky Street 664033 Irkutsk Russia
| | - Larisa P. Oznobikhina
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Division of the Russian Academy of Science; 1 Favorsky Street 664033 Irkutsk Russia
| | - Vladimir I. Meshcheryakov
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Division of the Russian Academy of Science; 1 Favorsky Street 664033 Irkutsk Russia
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