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Zhang H, Wang L, Xie Y, Zhang S, Ning P, Wang X. Silica-supported ionic liquid for efficient gaseous arsenic oxide removal through hydrogen bonding. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134482. [PMID: 38704905 DOI: 10.1016/j.jhazmat.2024.134482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/08/2024] [Accepted: 04/28/2024] [Indexed: 05/07/2024]
Abstract
The emission of highly-toxic gaseous As2O3 (As2O3 (g)) from nonferrous metal smelting poses environmental concerns. In this study, we prepared an adsorbent (SMIL-X) by loading an ionic liquid (IL) ([HOEtMI]NTf2) into MCM-41 through an impregnation-evaporation process and then applied it to adsorb As2O3 (g). SMIL-20% exhibited an As2O3 (g) adsorption capacity of 35.48 mg/g at 400 °C, which was 490% times higher than that of neat MCM-41. Characterization of SMIL-X indicated that the IL was mainly supported on MCM-41 through O-H…O bonds formed between the hydroxyl groups (-OH) and the silanol groups (Si-OH) and the O-H…F bonds formed between the C-F groups and the Si-OH groups. The hydrogen bonds significantly contributed to the adsorption of As2O3 (g), with -NH and -OH groups forming hydrogen bonds with As-O species (i.e., N-H…O and O-H…O). This showed superior performance to traditional adsorbents that rely on van der Waals forces and chemisorption. Moreover, after exposure to high concentrations of SO2, the adsorption capacities remained at 76% of their initial values, demonstrating some sulfur resistance. This study presents an excellent adsorbent for the purification of As2O3 (g) and shows promising application potential for treating flue gas emitted by nonferrous metal smelting processes.
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Affiliation(s)
- Hui Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Hubei Key Laboratory of Industrial Fume and Dust Pollution Control, Jianghan University, Wuhan 430056, China
| | - Langlang Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Yibing Xie
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Shici Zhang
- Hubei Key Laboratory of Industrial Fume and Dust Pollution Control, Jianghan University, Wuhan 430056, China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
| | - Xueqian Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
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2
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Ettouil A, Oubihi A, Imtara H, Atfaoui K, Mothana RA, Noman OM, Tarayrah M, Ouhssine M. Optimizing the Extraction Efficiency of Flaxseed Gum Using a Response Surface Methodology Approach. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2024; 2024:5135565. [PMID: 38957570 PMCID: PMC11217574 DOI: 10.1155/2024/5135565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 04/15/2024] [Accepted: 05/16/2024] [Indexed: 07/04/2024]
Abstract
The extraction of gum from natural raw materials is of increasing importance in various industries, including food, pharmaceuticals, and cosmetics, particularly due to their emulsifying properties and potential applications as stabilizers and thickeners. This study presents an insight on the influence of changing parameters like reagents and operating condition on yield and some properties of the flax (Linum usitatissimum L.) seed gum. The extraction conditions were meticulously examined using a full factorial design, highlighting the significant impact of pretreatment, seed preparation, and solvent selection on the extraction yield. A response surface methodology (RSM) was then applied to optimize the water/benzoic acid ratio of the pretreatment step, the ethyl alcohol/water ratio, and the medium pH of the extraction method, resulting in a maximum yield of 14.47%. Furthermore, detailed analyses of the chemical and emulsifying properties of the gum were conducted showing emulsifying capacities over 94%, offering promising application prospects, particularly in the food industry.
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Affiliation(s)
- Abdessamad Ettouil
- Natural Resources and Sustainable Development Laboratory, Department of Biology, Faculty of Sciences, Ibn Tofail University, Bp: 133, Kenitra, Morocco
| | - Asmaa Oubihi
- Natural Resources and Sustainable Development Laboratory, Department of Biology, Faculty of Sciences, Ibn Tofail University, Bp: 133, Kenitra, Morocco
| | - Hamada Imtara
- Faculty of Medicine, Arab American University Palestine, Jenin 44862, State of Palestine
| | - Khadija Atfaoui
- Natural Resources and Sustainable Development Laboratory, Department of Biology, Faculty of Sciences, Ibn Tofail University, Bp: 133, Kenitra, Morocco
| | - Ramzi A. Mothana
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Omar M. Noman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mahmoud Tarayrah
- Groupe Hospitalier Cochin-Port Royal, Faculty of Medicine, Institut Cochin, Paris University, CNRS, IN-SERM, Paris 75000, France
| | - Mohammed Ouhssine
- Natural Resources and Sustainable Development Laboratory, Department of Biology, Faculty of Sciences, Ibn Tofail University, Bp: 133, Kenitra, Morocco
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Șerban AM, Nacu I, Rosca I, Ghilan A, Rusu AG, Niță LE, Darie-Niță RN, Chiriac AP. Preparation and Characterization of Polymeric Microparticles Based on Poly(ethylene brassylate-co-squaric Acid) Loaded with Norfloxacin. Pharmaceutics 2024; 16:550. [PMID: 38675211 PMCID: PMC11053867 DOI: 10.3390/pharmaceutics16040550] [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: 03/07/2024] [Revised: 04/10/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024] Open
Abstract
In recent years, increasing interest has been accorded to polyester-based polymer microstructures, driven by their promising potential as advanced drug delivery systems. This study presents the preparation and characterization of new polymeric microparticles based on poly(ethylene brassylate-co-squaric acid) loaded with norfloxacin, a broad-spectrum antibiotic. Polymacrolactone was synthesised in mild conditions through the emulsion polymerization of bio-based and renewable monomers, ethylene brassylate, and squaric acid. The microparticles were obtained using the precipitation technique and subsequently subjected to comprehensive characterization. The impact of the copolymer/drug ratio on various properties of the new system was systematically evaluated, confirming the structure of the copolymer and the encapsulation of norfloxacin. The microspheres are approximately spherical and predominantly homogeneously distributed. The average hydrodynamic diameter of the microparticles falls between 400 and 2000 nm, a decrease that is observed with the increase in norfloxacin content. All samples showed good encapsulation efficiency and drug loading capacity, with the highest values obtained for microparticles synthesised using an equal ratio of copolymer and drug. In vitro drug release results disclose that norfloxacin molecules are released in a sustained biphasic manner for up to 24 h. Antimicrobial activity was also studied, with samples showing very good activity against E. coli and moderate activity against S. aureus and E. faecalis. In addition, HDFA human fibroblast cell cultures demonstrated the cytocompatibility of the microparticles.
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Affiliation(s)
- Alexandru-Mihail Șerban
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Isabella Nacu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
- Biomedical Sciences Department, Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
| | - Irina Rosca
- Center of Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alina Ghilan
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alina Gabriela Rusu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Loredana Elena Niță
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Raluca Nicoleta Darie-Niță
- Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Aurica P Chiriac
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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Stoyanov ES, Bagryanskaya IY, Stoyanova IV. A new type of C +⋯H δ-(C=) bond in adducts of vinyl carbocations with alkenes. Sci Rep 2024; 14:8423. [PMID: 38600206 PMCID: PMC11006867 DOI: 10.1038/s41598-024-58109-4] [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: 12/19/2023] [Accepted: 03/25/2024] [Indexed: 04/12/2024] Open
Abstract
By X-ray diffraction analysis and IR spectroscopy, it was established here that vinyl carbocations C3H5+/C4H7+ with carborane counterion CHB11Cl11- form stable monosolvates C3H5+⋅C3H6/C4H7+⋅C4H8 with molecules of alkenes C3H6/C4H8. They contain molecular group =C+⋯Hδ--Cδ+= with a new type of bond formed by the H atom of the H-C= group of the alkene with the C atom of the C+=C group of the carbocation. The short C+----Cδ+ distance, equal to 2.44 Å, is typical of that of X----X in proton disolvates (L2H+) with an quasi-symmetrical X-H+⋯X moiety (where X = O or N) of basic molecule L. The nature of the discovered bond differs from that of the classic H-bond by an distribution of electron density: the electron-excessive Hδ- atom from the (=)C-H group of the alkene is attached to the C+ atom of the carbocation, on which the positive charge is predominantly concentrated. Therefore, it can be called an inverse hydrogen bond.
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Affiliation(s)
- Evgenii S Stoyanov
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia.
| | - Irina Yu Bagryanskaya
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Irina V Stoyanova
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia
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5
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Afonin AV, Rusinska-Roszak D. Quantification of hydrogen bond energy based on equations using spectroscopic, structural, QTAIM-based, and NBO-based descriptors which calibrated by the molecular tailoring approach. J Mol Model 2023; 30:18. [PMID: 38159168 PMCID: PMC10757697 DOI: 10.1007/s00894-023-05811-1] [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: 11/11/2023] [Accepted: 12/12/2023] [Indexed: 01/03/2024]
Abstract
CONTEXT Hydrogen bonds critically influence the structure and properties of both organic molecules and biomolecules, as well as supramolecular assemblies. For this reason, the development and elaboration of methods for quantitative assessment of hydrogen bond energy is an urgent challenge. In this study, using a large series of hydroxycarbonyl aliphatic compounds with the O‒H···O = C intramolecular hydrogen bond, a bank of hydrogen bond descriptors was created, including spectroscopic, structural, QTAIM-based, and NBO-based parameters. It was shown that the O‒H vibration frequency, OH chemical shift as the spectroscopic descriptors, the O···H hydrogen bond length, O···O distance, and O‒H covalent bond length as the structural descriptors, the electron density and its Laplacian, electron potential energy density in the hydrogen bond critical point, the electron density at the ring critical point as the QTAIM-based descriptors change in a correlated manner. The same correlation is found in change of the charge transfer energy through a hydrogen bond, the occupancy of the O‒H bond antibonding orbital, the Wiberg indices of the O···H hydrogen bond, and the O‒H covalent bond, as well as the polarization of the O‒H bond, which are the NBO-based descriptors. It was also recognized that the specified descriptors from the spectroscopic, structural, QTAIM-based, and NBO-based categories are functionally related to the values of intramolecular hydrogen bond energy, quantified via the molecular tailoring approach. This allowed one to obtain a system of equations for quantitative estimation of intramolecular hydrogen bond energy based on the spectroscopic, structural, QTAIM, and NBO descriptors, which makes such quantification more dependable and reliable. METHODS To obtain the spectroscopic descriptors, the vibrational spectra and shielding constants were calculated using the GIAO method. Structural descriptors were obtained for the equilibrium geometry of molecules, calculated at the MP2(FC)/6-311 + + (2d,2p) level using the Gaussian 09 program. The QTAIM-based descriptors were calculated using the AIMAll program within the framework of the quantum theory "Atoms in Molecules." The NBO-based descriptors were calculated using the NBO 3.1 program implemented into Gaussian 09. To quantify the energy of intramolecular hydrogen bonds, molecular fragmentation was used within the molecular tailoring approach.
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Affiliation(s)
- Andrei V Afonin
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of Russian Academy of Sciences, Irkutsk, Russia
| | - Danuta Rusinska-Roszak
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Poznan, Poland.
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6
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Hejna A, Barczewski M, Kosmela P, Mysiukiewicz O, Piasecki A, Tercjak A. Compatibility of Sustainable Mater-Bi/poly(ε-caprolactone)/cellulose Biocomposites as a Function of Filler Modification. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6814. [PMID: 37895795 PMCID: PMC10608571 DOI: 10.3390/ma16206814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/04/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023]
Abstract
Despite their popularity and multiplicity of applications, wood-polymer composites (WPCs) still have to overcome particular issues related to their processing and properties. The main aspect is the compatibility with plant-based materials which affects the overall performance of the material. It can be enhanced by strengthening the interfacial adhesion resulting from physical and/or chemical interactions between the matrix and filler, which requires introducing a compatibilizer or a proper modification of one or both phases. Herein, the impact of cellulose filler modifications with varying contents (1-10 wt%) of hexamethylene diisocyanate (HDI) on the compatibility of Mater-Bi/poly(ε-caprolactone) (PCL)-based biocomposites was evaluated. An analysis of surface wettability revealed that the filler modification reduced the hydrophilicity gap between phases, suggesting compatibility enhancement. It was later confirmed via microscopic observation (scanning electron microscopy (SEM) and atomic force microscopy (AFM)), which pointed to the finer dispersion of modified particles and enhanced quality of the interface. The rheological analysis confirmed increased system homogeneity by the reduction in complex viscosity. In contrast, thermogravimetric analysis (TGA) indicated the efficient modification of filler and the presence of the chemical interactions at the interface by the shift of thermal decomposition onset and the changes in the degradation course.
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Affiliation(s)
- Aleksander Hejna
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznań, Poland; (M.B.); (O.M.)
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland;
| | - Mateusz Barczewski
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznań, Poland; (M.B.); (O.M.)
| | - Paulina Kosmela
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland;
| | - Olga Mysiukiewicz
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznań, Poland; (M.B.); (O.M.)
| | - Adam Piasecki
- Institute of Materials Engineering, Poznan University of Technology, Piotrowo 3, 61-138 Poznań, Poland;
| | - Agnieszka Tercjak
- Group ‘Materials + Technologies’ (GMT), Department of Chemical and Environmental Engineering, Faculty of Engineering Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 Donostia-San Sebastian, Spain;
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7
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Pankin D, Povolotckaia A, Borisov E, Belyakov M, Borzenko S, Gulyaev A, Moskovskiy M. Theoretical modelling of structure, vibrational and UV-vis absorbance spectra of rubrofusarin molecule. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122469. [PMID: 36801731 DOI: 10.1016/j.saa.2023.122469] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/30/2023] [Accepted: 02/04/2023] [Indexed: 06/18/2023]
Abstract
The structure of the rubrofusarin molecule (CAS: 3567-00-8, IUPAC name 5,6-dihydroxy-8-methoxy-2-methyl-4H-benzo[g]chromen-4-one, molecular formula C15H12O5) and its possible rotational conformers and tautomer were investigated within DFT approach. It was noted that for a stable molecules the group symmetry is close to Cs. The smallest potential barrier for rotational conformers is associated with the methoxy group rotation. The rotation of hydroxyl groups leads to a stable states that are substantially higher in energy than the ground state. Modeling and interpretation of vibrational spectra for the case of the ground state molecule in the gas phase and methanol solution was carried out, the influence of the solvent is discussed. The modelling of electronic singlet transition within the TD-DFT approach and the interpretation of obtained UV-vis absorbance spectra were carried out. A relatively small shift in the two most active absorption bands wavelength takes place for methoxy group rotation conformer. At the same time the redshift of the HOMO-LUMO transition takes place for this conformer. Much larger long wavelength shift of the absorption bands was noted for the tautomer.
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Affiliation(s)
- D Pankin
- Center for Optical and Laser Materials Research, St. Petersburg State University, Ulianovskaya 5, 198504 St. Petersburg, Russia
| | - A Povolotckaia
- Center for Optical and Laser Materials Research, St. Petersburg State University, Ulianovskaya 5, 198504 St. Petersburg, Russia
| | - E Borisov
- Center for Optical and Laser Materials Research, St. Petersburg State University, Ulianovskaya 5, 198504 St. Petersburg, Russia
| | - M Belyakov
- Federal Scientific Agro-Engineering Center VIM, 1st Institutskiy proezd 5, 109428 Moscow, Russia
| | - S Borzenko
- Federal Scientific Agro-Engineering Center VIM, 1st Institutskiy proezd 5, 109428 Moscow, Russia
| | - A Gulyaev
- Federal Scientific Agro-Engineering Center VIM, 1st Institutskiy proezd 5, 109428 Moscow, Russia
| | - M Moskovskiy
- Federal Scientific Agro-Engineering Center VIM, 1st Institutskiy proezd 5, 109428 Moscow, Russia
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8
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Miadonye A, Amadu M, Stephens J, O'Keefe T. Correlation of tangible quality parameters of vegetable-based transformer fluids. Heliyon 2023; 9:e14763. [PMID: 37025818 PMCID: PMC10070675 DOI: 10.1016/j.heliyon.2023.e14763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/31/2023] Open
Abstract
Due to the inherent environmental footprint of petroleum derived transformer fluids, the power industry is gradually exploring the potential of vegetable oils as alternatives. The impetus comes mostly from vegetable oils renewability and their inherent biodegradability. However, the major drawback in the use of vegetable oils as dielectric fluids is their lower oxidative stability and higher kinematic viscosity compared to mineral oils. The results obtained clearly demonstrate the correlation between spectroscopic data induction time, kinematic viscosity, acid value, and peroxide value. Quantitatively, the absorption frequencies of functional groups in vegetable oil transformer fluids that can be correlated to the mentioned quality parameters show noticeable changes with aging/oxidative degradation. The study also demonstrates the utility of integrating spectroscopic data to understand trends in induction time and kinematic viscosity of oil samples heated under transformer service conditions.
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Affiliation(s)
- Adango Miadonye
- School of Science & Technology, Cape Breton University, Sydney, NS, Canada
| | - Mumuni Amadu
- School of Science & Technology, Cape Breton University, Sydney, NS, Canada
- Corresponding author.
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9
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Jóźwiak K, Jezierska A, Panek JJ, Kochel A, Filarowski A. Inter- vs. Intra-Molecular Hydrogen Bond in Complexes of Nitrophthalic Acids with Pyridine. Int J Mol Sci 2023; 24:ijms24065248. [PMID: 36982321 PMCID: PMC10048863 DOI: 10.3390/ijms24065248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
This study covers the analysis of isomeric forms of nitrophthalic acids with pyridine. This work dwells on the complementary experimental (X-ray, IR and Raman) and theoretical (Car-Parrinello Molecular Dynamics (CPMD) and Density Functional Theory (DFT)) studies of the obtained complexes. The conducted studies showed that steric repulsion between the nitro group in ortho-position and the carboxyl group causes significant isomeric changes. Modeling of the nitrophthalic acid—pyridine complex yielded a short strong intramolecular hydrogen bond (SSHB). The transition energy from the isomeric form with an intermolecular hydrogen bond to the isomeric form with an intramolecular hydrogen bond was estimated.
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Revealing the Reasons for Degeneration of Resonance-Assisted Hydrogen Bond on the Aromatic Platform: Calculations of Ortho-, Meta-, Para-Disubstituted Benzenes, and ( Z)-( E)-Olefins. Molecules 2023; 28:molecules28020536. [PMID: 36677595 PMCID: PMC9860835 DOI: 10.3390/molecules28020536] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 01/06/2023] Open
Abstract
The energies of the O-H∙∙∙O=C intramolecular hydrogen bonds were compared quantitatively for the series of ortho-disubstituted benzenes and Z-isomers of olefins via a molecular tailoring approach. It was established that the hydrogen bond energy in the former series is significantly less than that in the latter one. The reason for lowering the hydrogen bond energy in the ortho-disubstituted benzenes compared to the Z-isomers of olefins is the decrease in the π-contribution to the total energy of the complex interaction, in which the hydrogen bond per se is enhanced by the resonance effect. By the example of the para- and meta-disubstituted benzenes, as well as E-isomers of olefins, it was explicitly shown that the aromatic ring is a much poorer conductor of the resonance effect compared to the double bond. The hydrogen bond in the ortho-disubstituted benzenes has a lower energy than a typical resonance-assisted hydrogen bond because the aromatic moiety cannot properly assist the hydrogen bond with a resonance effect. Thus, a hydrogen bond on an aromatic platform should fall into a special category, namely an aromaticity-assisted hydrogen bond, which is closer by nature to a simple hydrogen bond rather than to a resonance-assisted one.
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11
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Martínez-Manjarres A, Quevedo R. Intermolecular hydrogen bonding effects on the reaction of dianisidine, bisphenol A (BPA) and formaldehyde. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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12
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An in vitro study of the 5-methyl- and 5-bromo/chloro substituted 2-hydroxy-3-nitrochalcones as α-glucosidase and/or α-amylase inhibitors with potential anti-inflammatory activity. Med Chem Res 2022. [DOI: 10.1007/s00044-022-02980-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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13
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Mphahlele MJ, Maluleka MM, Mokoena TP. Spectroscopic, XRD, Hirshfeld surface and density functional theory (DFT) studies of the non-covalent interactions in 2-hydroxy-3-iodo-5-nitroacetophenone. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Gawinkowski S, Prakash O. Searching for correlations between geometric and spectroscopic parameters of intramolecular hydrogen bonds in porphyrin-like macrocycles. Phys Chem Chem Phys 2022; 24:22319-22329. [PMID: 36098255 DOI: 10.1039/d2cp01195f] [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
Chemical bond lengths and angles are characteristic structural parameters of a molecule. Similarly, the frequencies of the vibrational modes and the NMR chemical shifts are unique "chemical fingerprints" specific to a compound. These are the basic parameters describing newly obtained compounds and enabling their identification. Intramolecular hydrogen bonding significantly influences the physicochemical properties of macrocyclic compounds with a porphyrin-like structure. This work presents the verification for correlations between geometric and spectroscopic parameters related to hydrogen bonds in this type of macrocyclic compounds. In particular, such relationships were investigated for a large group of porphyrin, porphycene, and dibenzotetraaza[14]annulene derivatives and a group of other macrocycles with similar structure. A very strong linear correlation was found only between the vibrational frequencies of the NH groups involved in a hydrogen bond and the length of this bond, which applied to all macrocyclic compounds of this type. Several other relationships were found between spectroscopic (IR, Raman, NMR) and geometric (X-ray) parameters, highlighting differences and similarities between different families of macrocycles. Apart from providing a better understanding of the nature of hydrogen bonds and their characteristics in porphyrin-like macrocyclic compounds, these relationships will facilitate the identification of new macrocycles and the extrapolation of their spectroscopic properties.
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Affiliation(s)
- Sylwester Gawinkowski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Om Prakash
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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15
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Afonin AV, Rusinska‐Roszak D. Molecular tailoring approach as tool for revealing resonance‐assisted hydrogen bond: Case study of
Z
‐pyrrolylenones with the NH⋯OС intramolecular hydrogen bond. J Comput Chem 2022; 43:1596-1607. [DOI: 10.1002/jcc.26960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/14/2022] [Accepted: 06/18/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Andrei V. Afonin
- A. E. Favorsky Irkutsk Institute of Chemistry Siberian Division of Russian Academy of Sciences Irkutsk Russia
| | - Danuta Rusinska‐Roszak
- Institute of Chemical Technology and Engineering Poznan University of Technology Poznan Poland
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16
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Vesco G, Brambati M, Scapinello L, Penoni A, Mella M, Masson M, Gaware V, Maspero A, Nardo L. Asymmetric Phenyl Substitution: An Effective Strategy to Enhance the Photosensitizing Potential of Curcuminoids. Pharmaceuticals (Basel) 2022; 15:ph15070843. [PMID: 35890142 PMCID: PMC9321223 DOI: 10.3390/ph15070843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/01/2022] [Accepted: 07/06/2022] [Indexed: 11/16/2022] Open
Abstract
Curcumin has been demonstrated to exhibit photosensitized bactericidal activity. However, the full exploitation of curcumin as a photo-pharmaceutical active principle is hindered by fast deactivation of the excited state through the transfer of the enol proton to the keto oxygen. Introducing an asymmetry in the molecular structure through acting on the phenyl substituents is expected to be a valuable strategy to impair this undesired de-excitation mechanism competing with the therapeutically relevant ones. In this study, two asymmetric curcumin analogs were synthesized and characterized as to their electronic-state transition spectroscopic properties. Fluorescence decay distributions were also reconstructed. Their analysis confirmed the substantial stabilization of the fluorescent state with respect to the parent compound. Nuclear magnetic resonance experiments were performed with the aim of determining the structural features of the keto-enol ring and the strength of the keto-enol hydrogen bond. Electronic structure calculations were also undertaken to elucidate the effects of substitution on the features of the keto-enol semi-aromatic system and the proneness to proton transfer. Finally, their singlet oxygen-generation efficiency was compared to that of curcumin through the 9,10-dimethylanthracene fluorescent assay.
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Affiliation(s)
- Guglielmo Vesco
- Department of Science and High Technology, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy; (G.V.); (M.B.); (L.S.); (A.P.); (M.M.)
| | - Martino Brambati
- Department of Science and High Technology, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy; (G.V.); (M.B.); (L.S.); (A.P.); (M.M.)
| | - Luca Scapinello
- Department of Science and High Technology, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy; (G.V.); (M.B.); (L.S.); (A.P.); (M.M.)
| | - Andrea Penoni
- Department of Science and High Technology, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy; (G.V.); (M.B.); (L.S.); (A.P.); (M.M.)
| | - Massimo Mella
- Department of Science and High Technology, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy; (G.V.); (M.B.); (L.S.); (A.P.); (M.M.)
| | - Màr Masson
- School of Health Sciences, University of Iceland, Saemundargata 2, 102 Reykjavìk, Iceland; (M.M.); (V.G.)
| | - Vivek Gaware
- School of Health Sciences, University of Iceland, Saemundargata 2, 102 Reykjavìk, Iceland; (M.M.); (V.G.)
| | - Angelo Maspero
- Department of Science and High Technology, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy; (G.V.); (M.B.); (L.S.); (A.P.); (M.M.)
- Correspondence: (A.M.); (L.N.); Tel.: +39-031-238-6272 (A.M.); +39-031-238-6472 (L.N.)
| | - Luca Nardo
- Department of Science and High Technology, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy; (G.V.); (M.B.); (L.S.); (A.P.); (M.M.)
- Correspondence: (A.M.); (L.N.); Tel.: +39-031-238-6272 (A.M.); +39-031-238-6472 (L.N.)
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17
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Wojtkowiak K, Jezierska A, Panek JJ. Revealing Intra- and Intermolecular Interactions Determining Physico-Chemical Features of Selected Quinolone Carboxylic Acid Derivatives. Molecules 2022; 27:2299. [PMID: 35408698 PMCID: PMC9000753 DOI: 10.3390/molecules27072299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 03/24/2022] [Accepted: 03/30/2022] [Indexed: 02/04/2023] Open
Abstract
The intra- and intermolecular interactions of selected quinolone carboxylic acid derivatives were studied in monomers, dimers and crystals. The investigated compounds are well-recognized as medicines or as bases for further studies in drug design. We employed density functional theory (DFT) in its classical formulation to develop gas-phase and solvent reaction field (PCM) models describing geometric, energetic and electronic structure parameters for monomers and dimers. The electronic structure was investigated based on the atoms in molecules (AIM) and natural bond orbital (NBO) theories. Special attention was devoted to the intramolecular hydrogen bonds (HB) present in the investigated compounds. The characterization of energy components was performed using symmetry-adapted perturbation theory (SAPT). Finally, the time-evolution methods of Car-Parrinello molecular dynamics (CPMD) and path integral molecular dynamics (PIMD) were employed to describe the hydrogen bond dynamics as well as the spectroscopic signatures. The vibrational features of the O-H stretching were studied using Fourier transformation of the autocorrelation function of atomic velocity. The inclusion of quantum nuclear effects provided an accurate depiction of the bridged proton delocalization. The CPMD and PIMD simulations were carried out in the gas and crystalline phases. It was found that the polar environment enhances the strength of the intramolecular hydrogen bonds. The SAPT analysis revealed that the dispersive forces are decisive factors in the intermolecular interactions. In the electronic ground state, the proton-transfer phenomena are not favourable. The CPMD results showed generally that the bridged proton is localized at the donor side, with possible proton-sharing events in the solid-phase simulation of stronger hydrogen bridges. However, the PIMD enabled the quantitative estimation of the quantum effects inclusion-the proton position was moved towards the bridge midpoint, but no qualitative changes were detected. It was found that the interatomic distance between the donor and acceptor atoms was shortened and that the bridged proton was strongly delocalized.
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Affiliation(s)
| | - Aneta Jezierska
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland;
| | - Jarosław J. Panek
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland;
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18
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Hutchings MG, Lawrence AJ, Kennedy AR. Colour and constitution of conjugate bases of benzodifurantrione, its ring-opened derivatives and benzodifuranone dye analogues. Org Biomol Chem 2022; 20:2661-2670. [PMID: 35293408 DOI: 10.1039/d1ob02442f] [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
The observation of ready deprotonation of the phenylogous enol of benzodifurantrione (BDT) to give a bright violet conjugate base has led to two follow up explorations. Extension of BDT enol by insertion of a p-phenylene unit into the enol C-O bond gives the known bright red 4-hydroxylated benzodifuranone dyes. Their deprotonation results in previously unreported near infrared-absorbing conjugate bases. These appear to aggregate in solution, the more so in less polar solvents. Ring-opened derivatives of BDT containing α-dicarbonyl substituents also give coloured conjugate bases, but α-keto-ester and -anilide derivatives differ substantially (ester yellow; anilide intense red). Investigation of this nonintuitive difference leads to the conclusion that while the anilide is essentially planar the ester is nonplanar. The contrast in conformation impacts on the auxochromic effects of the otherwise closely related α-dicarbonyl substituents and thus the variation in colour. The latter observation has potential across colour chemistry in general. In contrast to the readily observed BDT enol, no evidence has been adduced for enol tautomers amongst the ring-opened analogues.
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Affiliation(s)
| | - Anthony J Lawrence
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK.
| | - Alan R Kennedy
- Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, UK
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19
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Evaluation of Tannins as Potential Green Corrosion Inhibitors of Aluminium Alloy Used in Aeronautical Industry. METALS 2022. [DOI: 10.3390/met12030508] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this work some organic natural products were studied, namely tannic acid, gallic acid, mimosa tannin and chestnut tannin, as potential green corrosion inhibitors of the aluminium alloy AA2024-T3. The anodizing treatment was performed in a solution of the referred organic compounds in diluted sulfuric acid. The electrochemical impedance spectroscopy and the potentiodynamic polarization were performed to assess sealing quality and corrosion protection granted by the anodic films. To understand the green inhibitors; interaction with the metal surface, FTIR spectra of anodizing and anodizing and sealed samples of AA2023-T3 were recorded, and the shifts in the position of the major bands confirmed that the green inhibitor interacts with the metal surface. Images of the morphology of the coatings were provided by Scanning Electron Microscopy. From the results obtained through the various techniques that were used to carry out this study it is possible to conclude that the formed anodic films can be a good contribution for the prevention of corrosion in the aluminium alloy AA2024-T3.
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20
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Liu L, Yang S, Chen F, Cheng KW. Polysaccharide-Zein Composite Nanoparticles for Enhancing Cellular Uptake and Oral Bioavailability of Curcumin: Characterization, Anti-colorectal Cancer Effect, and Pharmacokinetics. Front Nutr 2022; 9:846282. [PMID: 35308263 PMCID: PMC8924582 DOI: 10.3389/fnut.2022.846282] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/14/2022] [Indexed: 12/21/2022] Open
Abstract
Curcumin (CUR) has demonstrated promising potential as a therapeutic agent against colorectal cancer (CRC). However, its intrinsic shortcomings, including oxidative instability, sensitivity to gastrointestinal (GI) hydrolytic/enzymatic action, and susceptibility to biotransformation and systemic elimination, have greatly undermined its value for application in clinical settings. The development of carriers, in particular oral formulations, for its efficient delivery has remained an important direction in nutraceutical research. In the present work, CUR-encapsulated nanoparticles were fabricated with zein alone (Zein-CUR) and with zein and a polysaccharide (PS) [gum Arabic (GA), hyaluronic acid (HA) and pectin (PC), respectively] (PS-Zein-CUR). Their physicochemical and biological properties were evaluated in a series of in vitro and in vivo assays. Dynamic light scattering analysis showed an increase in the particle size of the nanoparticles from 129.0 nm (Zein-CUR) to 188.8–346.4 nm (PS-Zein-CUR). The three PS-Zein-CUR formulations had significantly higher (17–22%) CUR encapsulation efficiency (EE) than Zein-CUR. Among them, HA-Zein-CUR exhibited the highest EE and loading capacity. Zeta potential and FTIR spectra indicated the involvement of electrostatic and hydrophobic interactions and hydrogen bonds in the formation of the PS-Zein-CUR. In human CRC cell lines (HCT8, HCT29, and HCT116), the three PS-Zein-CUR and CUR all effectively inhibited cell viability and colony formation (HA-Zein-CUR > PC-Zein-CUR > GA-Zein-CUR/CUR). HA-Zein-CUR and PC-Zein-CUR also resulted in significantly higher cellular uptake of CUR than GA-Zein-CUR and CUR. Simulated GI-digestion assay demonstrated significantly improved controlled-release properties of these two formulations. Further pharmacokinetics and tissue distribution assays in a CRC subcutaneous xenograft model in nude mice corroborated the enhanced pharmacokinetic properties of intragastric administration of HA-Zein-CUR compared with that of free CUR (3 times higher Cmax and 9.18 times higher plasma AUC). HA-Zein-CUR also led to enhanced delivery and accumulation of CUR in major organs/tissues, in particular CRC tumors and colon. These results together support that HA-Zein-CUR has promising potential as an oral agent for the control of CRC.
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Affiliation(s)
- Lu Liu
- Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China
- Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen, China
| | - Shufang Yang
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China
- Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen, China
| | - Feng Chen
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China
- Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen, China
- *Correspondence: Feng Chen,
| | - Ka-Wing Cheng
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China
- Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen, China
- Ka-Wing Cheng,
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21
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Öztürkkan FE, Özdemir M, Akbaba GB, Sertçelik M, Yalçın B, Necefoğlu H, Hökelek T. Synthesis, crystal structure, potential drug properties for Coronavirus of Co(II) and Zn(II) 2-chlorobenzoate with 3-cyanopyridine complexes. J Mol Struct 2022; 1250:131825. [PMID: 34744184 PMCID: PMC8556650 DOI: 10.1016/j.molstruc.2021.131825] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/24/2021] [Accepted: 10/26/2021] [Indexed: 01/18/2023]
Abstract
Two new complexes of Co(II) and Zn(II) 2-chlorobenzoate (2-ClBA) with 3-cyanopyridine (CNP) of the general formula [Co(2-ClBA)2(CNP)2(H2O)2] and [Zn(2-ClBA)2(CNP)2(H2O)2] were synthesized. The structures of the complexes were characterized by single crystal XRD and FT-IR and NMR spectroscopy and Mass Spectrometry (MALDI-TOF MS) methods. Mononuclear complexes exhibit octahedral coordination. In addition, Hirshfeld surface analysis was performed to determine non-covalent interactions in crystal packing. The geometry optimization of the molecules was carried out using the LANL2DZ level of theory of the DFT method and the obtained findings were confirmed by comparing with the data obtained from the single crystal X-ray diffraction method. The theoretical and experimental bond angles and lengths are very close to each other. The effectiveness of the complexes against SARS-CoV-2 enzymes was investigated in silico using the molecular docking method, and a binding score of -8.0 kcal/mol on NSP16 of complex 1 as an inhibitor was obtained. To investigate the drug potential of the complexes, their pharmacokinetic and toxicokinetic properties were estimated by ADMET calculations.
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Affiliation(s)
| | - Mücahit Özdemir
- Department of Chemistry, Marmara University, İstanbul, Turkey
| | | | | | - Bahattin Yalçın
- Department of Chemistry, Marmara University, İstanbul, Turkey
| | | | - Tuncer Hökelek
- Department of Physics, Hacettepe University, Ankara, Turkey
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22
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Al Anshori J, Ismalah D, Abror AF, Zainuddin A, Wiani Hidayat I, Yusuf M, Maharani R, Tatang Hidayat A. A new highly selective “off–on” typical chemosensor of Al3+, 1-((Z)-((E)-(3,5-dichloro-2-hydroxybenzylidene)hydrazono)methyl) naphthalene-2-ol, an experimental and in silico study. RSC Adv 2022; 12:2972-2979. [PMID: 35425327 PMCID: PMC8979200 DOI: 10.1039/d1ra08232a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/14/2022] [Indexed: 01/17/2023] Open
Abstract
A new promising fluorescent chemosensor based on a 2-hydroxynaphthaldehyde skeleton was successfully synthesized through double imine formation as a yellow solid with an overall chemical yield of 63%. The compound showed UV/Visible maxima of at 394 nm in DMSO. Based on spectroscopic data of FTIR, ToF-HRMS, 1H-NMR, and 13C-NMR, the product was characterized as 1-((Z)-((E)-(3,5-dichloro-2-hydroxybenzilydine)hydrazono)methyl)naphthalene-2-ol. Upon experimental study, the compound was confirmed as a highly selective and reversible off–on typical chemosensor against Al3+ with an emission quantum yield of 0.203 ± 0.009. The Job's plot analysis revealed that a highly stable 1:1 complex was formed with an association constant of 8.73 × 105 M−1. A pH-dependent study showed that the sensor was potentially applicable at physiological conditions (pH 7–8) in a mixture of DMSO : H2O (99 : 1, v/v). The LoD and LoQ of the chemosensor towards Al3+ in DMSO were found to be 0.04 and 0.14 μM respectively. Based on DFT and TD-DFT calculation (B3LYP hybrid method/basis set of 6-311+G(d,p)), the sensing mechanism of the chemosensor to the ion was discovered as inhibition of excited-state intramolecular proton transfer (ESIPT). A new promising fluorescent chemosensor of Al3+ based on a 2-hydroxynaphthaldehyde skeleton was successfully synthesized through double imine formation and demonstrated excellent sensing properties through the ESIPT inhibition mechanism.![]()
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Affiliation(s)
- Jamaludin Al Anshori
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
| | - Daliah Ismalah
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
| | - Ajar Faflul Abror
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
| | - Achmad Zainuddin
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
| | - Ika Wiani Hidayat
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
| | - Muhammad Yusuf
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
| | - Rani Maharani
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
| | - Ace Tatang Hidayat
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Bandung-Sumedang km.21, Jatinangor, Sumedang, 45363, Indonesia
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23
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Hansen PE, Vakili M, Kamounah FS, Spanget-Larsen J. NH Stretching Frequencies of Intramolecularly Hydrogen-Bonded Systems: An Experimental and Theoretical Study. Molecules 2021; 26:molecules26247651. [PMID: 34946735 PMCID: PMC8706864 DOI: 10.3390/molecules26247651] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 11/25/2022] Open
Abstract
The vibrational NH stretching transitions in secondary amines with intramolecular NH···O hydrogen bonds were investigated by experimental and theoretical methods, considering a large number of compounds and covering a wide range of stretching wavenumbers. The assignment of the NH stretching transitions in the experimental IR spectra was, in several instances, supported by measurement of the corresponding ND wavenumbers and by correlation with the observed NH proton chemical shifts. The observed wavenumbers were correlated with theoretical wavenumbers predicted with B3LYP density functional theory, using the basis sets 6-311++G(d,p) and 6-31G(d) and considering the harmonic as well as the anharmonic VPT2 approximation. Excellent correlations were established between observed wavenumbers and calculated harmonic values. However, the correlations were non-linear, in contrast to the results of previous investigations of the corresponding OH···O systems. The anharmonic VPT2 wavenumbers were found to be linearly related to the corresponding harmonic values. The results provide correlation equations for the prediction of NH stretching bands on the basis of standard B3LYP/6-311++G(d,p) and B3LYP/6-31G(d) harmonic analyses, with standard deviations close to 38 cm−1. This is significant because the full anharmonic VPT2 analysis tends to be impractical for large molecules, requiring orders of magnitude more computing time than the harmonic analysis.
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Affiliation(s)
- Poul Erik Hansen
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
- Correspondence: (P.E.H.); (J.S.-L.); Tel.: +45-4674-2432 (P.E.H.); +45-4674-2710 (J.S.-L.)
| | - Mohammad Vakili
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran;
| | - Fadhil S. Kamounah
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark;
| | - Jens Spanget-Larsen
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
- Correspondence: (P.E.H.); (J.S.-L.); Tel.: +45-4674-2432 (P.E.H.); +45-4674-2710 (J.S.-L.)
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24
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Andreica BI, Ailincai D, Sandu AI, Marin L. Amphiphilic chitosan-g-poly(trimethylene carbonate) - A new approach for biomaterials design. Int J Biol Macromol 2021; 193:414-424. [PMID: 34715200 DOI: 10.1016/j.ijbiomac.2021.10.174] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 10/19/2021] [Accepted: 10/23/2021] [Indexed: 01/14/2023]
Abstract
The paper presents the synthesis and characterization of poly(trimethylene carbonate) grafted chitosan as a new water soluble biopolymer suitable for in vivo applications. The synthesis was performed via ring-opening polymerization of 1,3-dioxan-2-one (trimethylene carbonate) (TMC) monomer, initiated by the functional groups of chitosan in the presence of toluene as solvent/swelling agent. By varying the molar ratio between the glucosamine units of chitosan and TMC, a series of chitosan derivatives with different content of poly(trimethylene carbonate) chains was synthetized. The structural characterization of the polymers was realized by FTIR and 1H NMR spectroscopy and their solubility was assessed in water and in organic solvents as well. The biocompatibility was investigated by MTS assay on Normal Human Dermal Fibroblasts, and the biodegradability was evaluated in lysozyme buffer solution. Further, the surface properties of the polymer films were analyzed by polarized optical microscopy, atomic force microscopy and water-to-air contact angle measurements. It was established that, by 5% substitution of chitosan with poly(trimethylene carbonate) chains having an average polymerization degree of 7, a water soluble polymer can be attained. Compared to the pristine chitosan, it has improved biocompatibility in solution and moderate wettability and higher biodegradability rate in solid state, pointing its suitability for in vivo applications.
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Affiliation(s)
| | - Daniela Ailincai
- "Petru Poni" Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania
| | - Andreea-Isabela Sandu
- "Petru Poni" Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania
| | - Luminita Marin
- "Petru Poni" Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania.
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25
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Mphahlele MJ, Zamisa SJ, El-Gogary TM. Characterization, Hirshfeld surface analysis, DFT study and an in vitro α-glucosidase/α-amylase/radical scavenging profiling of novel 5-styryl-2-(4-tolylsulfonamido) chalcones. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Moura A, Gaglieri C, Alarcon RT, Ferreira LT, Vecchi R, Sanches MLR, Oliveira RC, Venturini J, Silva‐Filho LC, Junior Caires F. A New Curcuminoids‐Coumarin Derivative: Mechanochemical Synthesis, Characterization and Evaluation of Its In Vitro Cytotoxicity and Antimicrobial Properties. ChemistrySelect 2021. [DOI: 10.1002/slct.202103359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Aniele Moura
- School of Sciences Chemistry Department UNESP São Paulo State University Bauru 17033-260 SP Brazil
| | - Caroline Gaglieri
- School of Sciences Chemistry Department UNESP São Paulo State University Bauru 17033-260 SP Brazil
| | - Rafael Turra Alarcon
- School of Sciences Chemistry Department UNESP São Paulo State University Bauru 17033-260 SP Brazil
| | | | - Rafael Vecchi
- Medicine School Tropical Diseases and Imaging Diagnosis UNESP-São Paulo State University Botucatu 18618-687 SP Brazil
| | - Mariana Liessa Rovis Sanches
- Bauru School of Dentistry Department of Biological Sciences USP-University of São Paulo Bauru 17011-220 SP Brazil
| | - Rodrigo Cardoso Oliveira
- Bauru School of Dentistry Department of Biological Sciences USP-University of São Paulo Bauru 17011-220 SP Brazil
| | - James Venturini
- Medicine School Tropical Diseases and Imaging Diagnosis UNESP-São Paulo State University Botucatu 18618-687 SP Brazil
- Medicine School UFMS- Mato Grosso do Sul Federal University Campo Grande 79070-900 MS Brazil
| | - Luiz Carlos Silva‐Filho
- School of Sciences Chemistry Department UNESP São Paulo State University Bauru 17033-260 SP Brazil
| | - Flávio Junior Caires
- School of Sciences Chemistry Department UNESP São Paulo State University Bauru 17033-260 SP Brazil
- Institute of Chemistry UNESP-São Paulo State University Araraquara 14800-900 SP Brazil
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27
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Kim JS, Choi YJ, Woo MR, Cheon S, Ji SH, Im D, Ud Din F, Kim JO, Youn YS, Oh KT, Lim SJ, Jin SG, Choi HG. New potential application of hydroxypropyl-β-cyclodextrin in solid self-nanoemulsifying drug delivery system and solid dispersion. Carbohydr Polym 2021; 271:118433. [PMID: 34364573 DOI: 10.1016/j.carbpol.2021.118433] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 12/21/2022]
Abstract
The purpose of this study was to use hydroxypropyl-β-cyclodextrin (HP-β-CD) as a novel carrier in solid SNEDDS and solid dispersions to enhance the solubility and oral bioavailability of poorly water-soluble dexibuprofen. The novel dexibuprofen-loaded solid SNEDDS was composed of dexibuprofen, corn oil, polysorbate 80, Cremophor® EL, and HP-β-CD at a weight ratio of 45/35/50/15/100. This solid SNEDDS spontaneously formed a nano-emulsion with a size of approximately 120 nm. Unlike the conventional solid SNEDDS prepared with colloidal silica as a carrier, this dexibuprofen-loaded solid SNEDDS exhibited a spherical structure. Similar to the dexibuprofen-loaded solid dispersion prepared with HP-β-CD, the transformation of the crystalline drug to an amorphous state with no molecular interactions were observed in the solid SNEDDS. Compared to the solid dispersion and dexibuprofen powder, solid SNEDDS significantly enhanced drug solubility and AUC. Therefore, HP-β-CD is a novel potential carrier in SNEDDS for improving the oral bioavailability of dexibuprofen.
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Affiliation(s)
- Jung Suk Kim
- College of Pharmacy, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, South Korea
| | - Yoo Jin Choi
- College of Pharmacy, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, South Korea
| | - Mi Ran Woo
- College of Pharmacy, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, South Korea
| | - Seunghyun Cheon
- College of Pharmacy, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, South Korea
| | - Sang Hun Ji
- College of Pharmacy, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, South Korea
| | - Daseul Im
- College of Pharmacy, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, South Korea
| | - Fakhar Ud Din
- Department of Pharmacy, Quaid-I-Azam University, Islamabad 45320, Pakistan
| | - Jong Oh Kim
- College of Pharmacy, Yeungnam University, 214-1, Dae-Dong, Gyongsan 712-749, South Korea
| | - Yu Seok Youn
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, South Korea
| | - Kyung Taek Oh
- College of Pharmacy, Chung-Ang University, 221 Heuksuk-dong Dongjak-gu, Seoul 156-756, South Korea
| | - Soo-Jeong Lim
- Department of Bioscience and Biotechnology, Sejong University, Gunja-Dong, Seoul 143-747, South Korea
| | - Sung Giu Jin
- Department of Pharmaceutical Engineering, Dankook University, 119 Dandae-ro, Dongnam-gu, Cheonan 31116, South Korea.
| | - Han-Gon Choi
- College of Pharmacy, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, South Korea.
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28
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Alam RM, Keating JJ. "Walking the nitrogen around the ring": Chemical synthesis and spectroscopic characterization of novel 4-, 5-, 6-, and 7-azaindazole analogs of the synthetic cannabinoid receptor agonist MDMB-PINACA. Drug Test Anal 2021; 14:277-297. [PMID: 34654062 DOI: 10.1002/dta.3180] [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: 08/18/2021] [Revised: 09/21/2021] [Accepted: 09/22/2021] [Indexed: 11/11/2022]
Abstract
Over the past decade, synthetic cannabinoid receptor agonists (SCRAs) have rapidly evolved to encompass a wide range of structurally diverse new psychoactive substances (NPS), including derivatives that incorporate indole, indazole, 7-azaindole, γ-carbolinone, or carbazole heterocyclic scaffolds. The introduction of legislative measures seeking to control the availability of NPS on the recreational drug scene has likely contributed to the continued emergence of novel SCRA analogs, which often evade regulatory control. However, the detection and/or identification of azaindazole-type SCRAs in seized material has not yet been reported (September, 2021). It is plausible that SCRAs bearing a 1,3-disubstituted azaindazole scaffold may possess cannabimimetic activity, given their structural similarity with known indole, indazole, and azaindole SCRAs. In view of these antecedents, a set of four novel isomeric 4-, 5-, 6-, and 7-azaindazole analogs of the known potent indazole SCRA, MDMB-PINACA, were synthesized using a Pd-catalyzed aminocarbonylation strategy. The complementary use of ultraviolet (UV) and infrared (IR) spectroscopy, gas chromatography-mass spectrometry (GC-MS), high resolution mass spectrometry (HRMS), 1D- and 2D-nuclear magnetic resonance (NMR) spectroscopy, and high performance liquid chromatography (HPLC) has permitted the spectroscopic differentiation, unambiguous structural assignment, and rapid separation of novel isomeric 4-, 5-, 6-, and 7-azaindazole analogs of the indazole SCRA, MDMB-PINACA.
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Affiliation(s)
- Ryan M Alam
- Analytical and Biological Chemistry Research Facility (ABCRF), University College Cork, Cork, Ireland.,School of Chemistry, University College Cork, Cork, Ireland
| | - John J Keating
- Analytical and Biological Chemistry Research Facility (ABCRF), University College Cork, Cork, Ireland.,School of Chemistry, University College Cork, Cork, Ireland.,School of Pharmacy, University College Cork, Cork, Ireland
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29
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Estimation of resonance assisted hydrogen bond (RAHB) energies using properties of ring critical points in some dihydrogen-bonded complexes. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Borodina O, Ovchinnikova I, Makarov G, Yeltsov O, Titova Y, Fedorova O, Masunov AE, Bartashevich E. Pseudocyclic Form of 4-Hydroxypyrrolidine-2-carboxanilide Podands with Trioxyethylene Chain: Modeling, Conformational Search, and NMR Analysis. J Phys Chem A 2021; 125:6029-6041. [PMID: 34232648 DOI: 10.1021/acs.jpca.1c02613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The 4-hydroxypyrrolidine-2-carboxanilide podand salt demonstrates catalytic activity in asymmetric Biginelli reaction. The systematic search for prevalent conformational state of the cation was carried out by computer simulations in combination with one- and two-dimensional NMR experiments. For that purpose, we proposed a novel algorithm for the generation and selection of conformers based on molecular dynamics and clustering in the space of principal components. The search had found an important trend of the podand to form a pseudocyclic structure with a horseshoe-shaped conformation of the oligooxyethylene fragment. This conformation is stabilized by different types of intramolecular hydrogen bonds between the acidic and basic centers of the two 4-hydroxypyrrolidine-2-carboxanilide residuals (branches). The proposed approach had made it possible to identify the major structural factors, providing a correlation between the calculated and experimental chemical shifts of hydrogen atoms in the 1H NMR spectra of the protonated podand.
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Affiliation(s)
- Olga Borodina
- South Ural State University,76 Lenina Avenue, Chelyabinsk 454080, Russia
| | - Irina Ovchinnikova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskoy/20 Akademicheskaya Street, Yekaterinburg 620108, Russia
| | - Gennady Makarov
- South Ural State University,76 Lenina Avenue, Chelyabinsk 454080, Russia
| | - Oleg Yeltsov
- Ural Federal University named after the first President of Russia B. N. Yeltsin, Mira Street, 19, Yekaterinburg, 620002, Russia
| | - Yulia Titova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskoy/20 Akademicheskaya Street, Yekaterinburg 620108, Russia.,Ural Federal University named after the first President of Russia B. N. Yeltsin, Mira Street, 19, Yekaterinburg, 620002, Russia
| | - Olga Fedorova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskoy/20 Akademicheskaya Street, Yekaterinburg 620108, Russia
| | - Artëm E Masunov
- South Ural State University,76 Lenina Avenue, Chelyabinsk 454080, Russia.,NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Orlando, Florida 32826, United States.,School of Modeling, Simulation, and Training, University of Central Florida, 3100 Technology Parkway, Orlando, Florida 32816, United States
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31
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Raczyński K, Pihut A, Panek JJ, Jezierska A. Competition of Intra- and Intermolecular Forces in Anthraquinone and Its Selected Derivatives. Molecules 2021; 26:3448. [PMID: 34204133 PMCID: PMC8201066 DOI: 10.3390/molecules26113448] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/01/2021] [Accepted: 06/04/2021] [Indexed: 11/16/2022] Open
Abstract
Intra- and intermolecular forces competition was investigated in the 9,10-anthraquinone (1) and its derivatives both in vacuo and in the crystalline phase. The 1,8-dihydroxy-9,10-anthraquinone (2) and 1,8-dinitro-4,5-dihydroxy-anthraquinone (3) contain Resonance-Assisted Hydrogen Bonds (RAHBs). The intramolecular hydrogen bonds properties were studied in the electronic ground and excited states employing Møller-Plesset second-order perturbation theory (MP2), Density Functional Theory (DFT) method in its classical formulation as well as its time-dependent extension (TD-DFT). The proton potential functions were obtained via scanning the OH distance and the dihedral angle related to the OH group rotation. The topological analysis was carried out on the basis of theories of Atoms in Molecules (AIM-molecular topology, properties of critical points, AIM charges) and Electron Localization Function (ELF-2D maps showing bonding patterns, calculation of electron populations in the hydrogen bonds). The Symmetry-Adapted Perturbation Theory (SAPT) was applied for the energy decomposition in the dimers. Finally, Car-Parrinello molecular dynamics (CPMD) simulations were performed to shed light onto bridge protons dynamics upon environmental influence. The vibrational features of the OH stretching were revealed using Fourier transformation of the autocorrelation function of atomic velocity. It was found that the presence of OH and NO2 substituents influenced the geometric and electronic structure of the anthraquinone moiety. The AIM and ELF analyses showed that the quantitative differences between hydrogen bonds properties could be neglected. The bridged protons are localized on the donor side in the electronic ground state, but the Excited-State Intramolecular Proton Transfer (ESIPT) was noticed as a result of the TD-DFT calculations. The hierarchy of interactions determined by SAPT method indicated that weak hydrogen bonds play modifying role in the organization of these crystal structures, but primary ordering factor is dispersion. The CPMD crystalline phase results indicated bridged proton-sharing in the compound 2.
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Affiliation(s)
| | | | | | - Aneta Jezierska
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland; (K.R.); (A.P.); (J.J.P.)
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32
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Koeppe B, Tolstoy PM, Guo J, Denisov GS, Limbach HH. Combined NMR and UV-Vis Spectroscopic Studies of Models for the Hydrogen Bond System in the Active Site of Photoactive Yellow Protein: H-Bond Cooperativity and Medium Effects. J Phys Chem B 2021; 125:5874-5884. [PMID: 34060830 DOI: 10.1021/acs.jpcb.0c09923] [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
Intramolecular hydrogen bonds in aprotic media were studied by combined (simultaneous) NMR and UV-vis spectroscopy. The species under investigation were anionic and featured single or coupled H-bonds between, for example, carboxylic groups and phenolic oxygen atoms (COO···H···OC)-, among phenolic oxygen atoms (CO···H···OC)-, and hydrogen bond chains between a carboxylic group and two phenolic oxygen atoms (COO···H···(OC)···H···OC)-. The last anion may be regarded as a small molecule model for the hydrogen bond system in the active site of wild-type photoactive yellow protein (PYP) while the others mimic the corresponding H-bonds in site-selective mutants. Proton positions in isolated hydrogen bonds and hydrogen bond chains were assessed by calculations for vacuum conditions and spectroscopically for the two media, CD2Cl2 and the liquefied gas mixture CDClF2/CDF3 at low temperatures. NMR parameters allow for the estimation of time-averaged H-bond geometries, and optical spectra give additional information about geometry distributions. Comparison of the results from the various systems revealed the effects of the formation of hydrogen bond chains and changes of medium conditions on the geometry of individual H-bonds. In particular, the proton in a hydrogen bond to a carboxylic group shifts from the phenolic oxygen atom in the system COO-···H-OC to the carboxylic group in COO-H···(OC)-···H-OC as a result of hydrogen bond formation to the additional phenolic donor. Increase in medium polarity may, however, induce the conversion of a structure of a type COO-H···(OC)-···H-OC to the type COO-···H-(OC)···H-OC. Application of these results obtained from the model systems to PYP suggests that both cooperative effects within the hydrogen bond chain and a low-polarity protein environment are prerequisites for the stabilization of negative charge on the cofactor and hence for the spectral tuning of the photoreceptor.
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Affiliation(s)
- Benjamin Koeppe
- J. Heyrovský Institute of Physical Chemistry, Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Peter M Tolstoy
- Institute of Chemistry, St. Petersburg State University, Universitetskij pr. 26, 198504 St. Petersburg, Russia
| | - Jing Guo
- Department of Radiology, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Gleb S Denisov
- Department of Physics, St. Petersburg State University, 198504 St. Petersburg, Russian Federation
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33
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Hydrogen Bonds: Raman Spectroscopic Study. Int J Mol Sci 2021; 22:ijms22105380. [PMID: 34065358 PMCID: PMC8161095 DOI: 10.3390/ijms22105380] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/14/2021] [Accepted: 05/18/2021] [Indexed: 11/26/2022] Open
Abstract
The work outlines general ideas on how the frequency and the intensity of proton vibrations of X–H···Y hydrogen bonding are formed as the bond evolves from weak to maximally strong bonding. For this purpose, the Raman spectra of different chemical compounds with moderate, strong, and extremely strong hydrogen bonds were obtained in the temperature region of 5 K–300 K. The dependence of the proton vibrational frequency is schematically presented as a function of the rigidity of O-H···O bonding. The problems of proton dynamics on tautomeric O–H···O bonds are considered. A brief description of the N–H···O and C–H···Y hydrogen bonds is given.
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34
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Trimdale A, Mishnev A, Bērziņš A. Combined Use of Structure Analysis, Studies of Molecular Association in Solution, and Molecular Modelling to Understand the Different Propensities of Dihydroxybenzoic Acids to Form Solid Phases. Pharmaceutics 2021; 13:734. [PMID: 34065675 PMCID: PMC8156891 DOI: 10.3390/pharmaceutics13050734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
The arrangement of hydroxyl groups in the benzene ring has a significant effect on the propensity of dihydroxybenzoic acids (diOHBAs) to form different solid phases when crystallized from solution. All six diOHBAs were categorized into distinctive groups according to the solid phases obtained when crystallized from selected solvents. A combined study using crystal structure and molecule electrostatic potential surface analysis, as well as an exploration of molecular association in solution using spectroscopic methods and molecular dynamics simulations were used to determine the possible mechanism of how the location of the phenolic hydroxyl groups affect the diversity of solid phases formed by the diOHBAs. The crystal structure analysis showed that classical carboxylic acid homodimers and ring-like hydrogen bond motifs consisting of six diOHBA molecules are prominently present in almost all analyzed crystal structures. Both experimental spectroscopic investigations and molecular dynamics simulations indicated that the extent of intramolecular bonding between carboxyl and hydroxyl groups in solution has the most significant impact on the solid phases formed by the diOHBAs. Additionally, the extent of hydrogen bonding with solvent molecules and the mean lifetime of solute-solvent associates formed by diOHBAs and 2-propanol were also investigated.
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Affiliation(s)
- Aija Trimdale
- Faculty of Chemistry, University of Latvia, Jelgavas iela 1, LV-1004 Riga, Latvia
| | - Anatoly Mishnev
- Latvian Institute of Organic Synthesis, Aizkraukles iela 21, LV-1006 Riga, Latvia;
| | - Agris Bērziņš
- Faculty of Chemistry, University of Latvia, Jelgavas iela 1, LV-1004 Riga, Latvia
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35
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Rotational conformation of 8,8′-dihalogenated derivatives of cobalt bis(dicarbollide) in solution. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3146-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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36
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Synthesis, in silico, in vitro and in vivo evaluations of isatin aroylhydrazones as highly potent anticonvulsant agents. Bioorg Chem 2021; 112:104943. [PMID: 33964578 DOI: 10.1016/j.bioorg.2021.104943] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 02/10/2021] [Accepted: 04/20/2021] [Indexed: 11/23/2022]
Abstract
In this study, a series of new isatin aroylhydrazones (5a-e and 6a-e) was synthesized and evaluated for their anticonvulsant activities. The (Z)-configuration of compounds was confirmed by 1H NMR. In vivo studies using maximal electroshock (MES) and pentylenetetrazole (PTZ) models of epilepsy in mice revealed that while most of compounds had no effect on chemically-induced seizures at the higher dose of 100 mg/kg but showed significant protection against electrically-induced seizures at the lower dose of 5 mg/kg. Certainly, N-methyl analogs 6a and 6e were found to be the most effective compounds, displaying 100% protection at the dose of 5 mg/kg. Protein binding and lipophilicity(logP) of the selected compounds (6a and 6e) were also determined experimentally. In silico evaluations of title compounds showed acceptable ADME parameters, and drug-likeness properties. Distance mapping and docking of the selected compounds with different targets proposed the possible action of them on VGSCs and GABAA receptors. The cytotoxicity evaluation of 6a and 6e against SH-SY5Y and Hep-G2 cell lines indicated safety profile of compounds on the neuronal and hepatic cells.
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37
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Hansen PE. A Spectroscopic Overview of Intramolecular Hydrogen Bonds of NH…O,S,N Type. Molecules 2021; 26:molecules26092409. [PMID: 33919132 PMCID: PMC8122615 DOI: 10.3390/molecules26092409] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/12/2021] [Accepted: 04/18/2021] [Indexed: 02/06/2023] Open
Abstract
Intramolecular NH…O,S,N interactions in non-tautomeric systems are reviewed in a broad range of compounds covering a variety of NH donors and hydrogen bond acceptors. 1H chemical shifts of NH donors are good tools to study intramolecular hydrogen bonding. However in some cases they have to be corrected for ring current effects. Deuterium isotope effects on 13C and 15N chemical shifts and primary isotope effects are usually used to judge the strength of hydrogen bonds. Primary isotope effects are investigated in a new range of magnitudes. Isotope ratios of NH stretching frequencies, νNH/ND, are revisited. Hydrogen bond energies are reviewed and two-bond deuterium isotope effects on 13C chemical shifts are investigated as a possible means of estimating hydrogen bond energies.
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Affiliation(s)
- Poul Erik Hansen
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
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38
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Gupta AK, Li W, Ruseckas A, Lian C, Carpenter-Warren CL, Cordes DB, Slawin AMZ, Jacquemin D, Samuel IDW, Zysman-Colman E. Thermally Activated Delayed Fluorescence Emitters with Intramolecular Proton Transfer for High Luminance Solution-Processed Organic Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:15459-15474. [PMID: 33783201 DOI: 10.1021/acsami.1c02248] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We report an organic emitter containing a β-triketone electron acceptor core and phenoxazine as the electron donors (TPXZBM) for solution-processed organic light-emitting diodes (OLEDs). The resulting molecule is very unusual because it shows both thermally activated delayed fluorescence and intramolecular proton transfer. We compare its performance with the previously reported diketone analogue PXZPDO. Solution-processed OLEDs of PXZPDO and TPXZBM show maximum external quantum efficiencies of 20.1 and 12.7%, respectively. The results obtained for the solution-processed PXZPDO-based device are as good as the previously reported evaporated device. At a very high luminance of 10,000 cd m-2, the efficiencies of the OLEDs were 10.6% for PXZPDO and 4.7% for TPXZBM, demonstrating a relatively low efficiency roll-off for TADF materials. The low efficiency roll-off was rationalized on the basis of the short delayed lifetimes of 1.35 μs for PXZPDO and 1.44 μs for TPXZBM. Our results suggest that intramolecular proton transfer may be useful for the design of OLED materials with a low efficiency roll-off.
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Affiliation(s)
- Abhishek Kumar Gupta
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, U.K
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, U.K
| | - Wenbo Li
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, U.K
| | - Arvydas Ruseckas
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, U.K
| | - Cheng Lian
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, U.K
| | - Cameron L Carpenter-Warren
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, U.K
| | - David B Cordes
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, U.K
| | - Alexandra M Z Slawin
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, U.K
| | - Denis Jacquemin
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
| | - Ifor D W Samuel
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, U.K
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, U.K
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39
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Patki AS, Patil KN, Kusuma S, Muley DB, Jadhav AH. One-pot synthesis of multicomponent pyrazole-4-carbonitrile derivatives under solvent-free condition by using engineered polyvinyl alcohol catalyst. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04450-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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40
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Podyachev SN, Zairov RR, Mustafina AR. 1,3-Diketone Calix[4]arene Derivatives-A New Type of Versatile Ligands for Metal Complexes and Nanoparticles. Molecules 2021; 26:molecules26051214. [PMID: 33668373 PMCID: PMC7956255 DOI: 10.3390/molecules26051214] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 12/20/2022] Open
Abstract
The present review is aimed at highlighting outlooks for cyclophanic 1,3-diketones as a new type of versatile ligands and building blocks of the nanomaterial for sensing and bioimaging. Thus, the main synthetic routes for achieving the structural diversity of cyclophanic 1,3-diketones are discussed. The structural diversity is demonstrated by variation of both cyclophanic backbones (calix[4]arene, calix[4]resorcinarene and thiacalix[4]arene) and embedding of different substituents onto lower or upper macrocyclic rims. The structural features of the cyclophanic 1,3-diketones are correlated with their ability to form lanthanide complexes exhibiting both lanthanide-centered luminescence and magnetic relaxivity parameters convenient for contrast effect in magnetic resonance imaging (MRI). The revealed structure–property relationships and the applicability of facile one-pot transformation of the complexes to hydrophilic nanoparticles demonstrates the advantages of 1,3-diketone calix[4]arene ligands and their complexes in developing of nanomaterials for sensing and bioimaging.
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41
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van Slagmaat CMR, Verzijl GKM, Quaedflieg PJLM, Alsters PL, De Wildeman SMA. Hydrogenation of Cyclic 1,3-Diones to Their 1,3-Diols Using Heterogeneous Catalysts: Toward a Facile, Robust, Scalable, and Potentially Bio-Based Route. ACS OMEGA 2021; 6:4313-4328. [PMID: 33623842 PMCID: PMC7893635 DOI: 10.1021/acsomega.0c05563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 12/30/2020] [Indexed: 06/12/2023]
Abstract
Cyclopentane-1,3-diol (4b) has gained renewed attention as a potential building block for polymers and fuels because its synthesis from hemicellulose-derived 4-hydroxycyclopent-2-enone (3) was recently disclosed. However, cyclopentane-1,3-dione (4), which is a constitutional isomer of 3, possesses a higher chemical stability and can therefore afford higher carbon mass balances and higher yields of 4b in the hydrogenation reaction under more concentrated conditions. In this work, the hydrogenation of 4 into 4b over a commercial Ru/C catalyst was systematically investigated on a bench scale through kinetic studies and variation of reaction conditions. Herein, the temperature, H2-pressure, and the solvent choice were found to have significant effects on the reaction rate and suppression of undesired dehydration of 4. The cis-trans ratio of 4b is naturally generated as 7:3 in these reactions. However, at elevated reaction temperatures, 4b epimerizes, yielding more trans products. This effect was also studied and rationalized from a thermodynamic perspective using DFT. The combined optimized reaction conditions provided 78% yield for 4b, and successful applications to 8-fold scaled up reactions (40 g) and a substrate scope of several 1,3-diones demonstrate the general applicability of this catalytic approach.
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Affiliation(s)
- Christian
A. M. R. van Slagmaat
- Chemelot
InSciTe, Gaetano Martinolaan
63-65, 6229 GS, Maastricht, The Netherlands
- Aachen-Maastricht
Institute for Biobased Materials (AMIBM), Faculty of Science and Engineering
(FSE), Maastricht University, Brightlands Chemelot Campus, 6167 RD, Geleen, The Netherlands
| | | | - Peter J. L. M Quaedflieg
- Chemelot
InSciTe, Gaetano Martinolaan
63-65, 6229 GS, Maastricht, The Netherlands
- InnoSyn
B.V., Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
| | - Paul L. Alsters
- Chemelot
InSciTe, Gaetano Martinolaan
63-65, 6229 GS, Maastricht, The Netherlands
- InnoSyn
B.V., Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
| | - Stefaan M. A. De Wildeman
- Chemelot
InSciTe, Gaetano Martinolaan
63-65, 6229 GS, Maastricht, The Netherlands
- Aachen-Maastricht
Institute for Biobased Materials (AMIBM), Faculty of Science and Engineering
(FSE), Maastricht University, Brightlands Chemelot Campus, 6167 RD, Geleen, The Netherlands
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42
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Reviglio AL, Martínez FA, Montero MDA, Garro-Linck Y, Aucar GA, Sperandeo NR, Monti GA. Accurate location of hydrogen atoms in hydrogen bonds of tizoxanide from the combination of experimental and theoretical models. RSC Adv 2021; 11:7644-7652. [PMID: 35423249 PMCID: PMC8695048 DOI: 10.1039/d0ra10609g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 02/05/2021] [Indexed: 11/25/2022] Open
Abstract
To obtain detailed information about the position of hydrogen atoms in hydrogen bonds, HBs, of crystalline organic molecular compounds is not an easy task. In this work we propose a combination of ssNMR experimental data with theoretical procedures to get such information. Furthermore, the combination of experimental and theoretical models provides us with well-defined grounds to analyse the strength of π-stacking interactions between layers of hydrogen bonded molecules. Two different theoretical models were considered, both approaches being quite different. The first one is a solid-state model, so that the periodicity of a crystalline system underlies calculations of the electronic energy, the electronic density and NMR parameters. The other one is a molecular model in which molecules are taken as isolated monomers, dimers and tetramers. These two models were applied to the tizoxanide, TIZ, molecular crystal though it can widely be applied to any other molecular crystal. By the application of the quantum molecular model it was possible to learn about the way the intermolecular HBs affect the position of hydrogen atoms that belong to HBs in TIZ. This molecule has two intermolecular HBs that stabilize the structure of a basic dimer, but it also has an intramolecular HB in each monomer whose position should be optimized together with the other ones. We found that by doing this it is possible to obtain reliable results of calculations of NMR spectroscopic parameters. Working with the solid-state model we found that any local variation of the TIZ crystalline structure is correlated with the variation of the values of the NMR parameters of each nucleus. The excellent agreement between experimental and calculated chemical shifts leads to the conclusion that the N10-H10 bond distance should be (1.00 ± 0.02) Å.
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Affiliation(s)
- Ana L Reviglio
- FAMAF, UNC Córdoba Argentina
- Instituto de Física Enrique Gaviola (IFEG), CONICET-UNC Córdoba Argentina
| | - Fernando A Martínez
- Institute of Modelling and Innovation on Technology (IMIT), CONICET-UNNE Corrientes Argentina
- Physics Department, Natural and Exact Science Faculty, Northeastern University of Argentina Corrientes Argentina
| | - Marcos D A Montero
- Institute of Modelling and Innovation on Technology (IMIT), CONICET-UNNE Corrientes Argentina
- Physics Department, Natural and Exact Science Faculty, Northeastern University of Argentina Corrientes Argentina
| | - Yamila Garro-Linck
- FAMAF, UNC Córdoba Argentina
- Instituto de Física Enrique Gaviola (IFEG), CONICET-UNC Córdoba Argentina
| | - Gustavo A Aucar
- Institute of Modelling and Innovation on Technology (IMIT), CONICET-UNNE Corrientes Argentina
- Physics Department, Natural and Exact Science Faculty, Northeastern University of Argentina Corrientes Argentina
| | - Norma R Sperandeo
- Departamento de Ciencias Farmacéuticas, FCQ, UNC Córdoba Argentina
- UNITEFA-CONICET Córdoba Argentina
| | - Gustavo A Monti
- FAMAF, UNC Córdoba Argentina
- Instituto de Física Enrique Gaviola (IFEG), CONICET-UNC Córdoba Argentina
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Szafran M, Komasa A, Rusek M, Katrusiak A, Dega-Szafran Z. Centrosymmetric and asymmetric dimers of 5-(quinolinium)-valeric acid bromide monohydrate in crystal field and in silico. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128912] [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]
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Mohammed SJ, Salih AK, Rashid MAM, Omer KM, Abdalkarim KA. Synthesis, Spectroscopic Studies and Keto-Enol Tautomerism of Novel 1,3,4-Thiadiazole Derivative Containing 3-Mercaptobutan-2-one and Quinazolin-4-one Moieties. Molecules 2020; 25:molecules25225441. [PMID: 33233669 PMCID: PMC7699804 DOI: 10.3390/molecules25225441] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/05/2020] [Accepted: 10/06/2020] [Indexed: 11/16/2022] Open
Abstract
In this study, a novel 1,3,4-thiadiazole derivative containing 3-mercaptobutan-2-one and quinazolin-4-one moieties (Compound 3) is synthesized by the coupling of 2-amino-1,3,4-thiadiazole-5-(3-mercaptobutan-2-one) (Compound 1) with 2-Phenyl-4H-3,1-benzoxazin-4-one (Compound 2) in one molecule moiety. Compound 3 is found to exist as two types of intra-molecular hydrogen bonding with keto-enol tautomerism characters, which is further confirmed using FTIR, 1H-NMR, 13C-NMR, mass spectrometer, and UV-Visible spectra. The 1H-NMR and UV-Visible spectra of Compound 3 are investigated in different solvents such as methanol, chloroform, and DMSO. Compound 3 exhibits keto-enol tautomeric forms in solvents with different percentage ratios depending on the solvent polarity. The 1H-NMR and UV-Visible spectral results show that Compound 3 favors the keto over the enol form in polar aprotic solvents such as DMSO and the enol over the keto form in non-polar solvents such as chloroform. The 13C-NMR spectrum gives two singles at δ 204.5 ppm, due to ketonic carbon, and δ 155.5 ppm, due to enolic carbon, confirming the keto-enol tautomerism of Compound 3. Furthermore, the molecular ion at m/z 43 and m/z 407 in the mass spectrum of Compound 3 and fragmentation mechanisms proposed reveal the existence of the keto and enol forms, respectively.
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Affiliation(s)
- Sewara J. Mohammed
- Department of Chemistry, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46002, Iraq; (A.K.S.); (M.A.M.R.); (K.A.A.)
- Correspondence: (S.J.M.); (K.M.O.); Tel.: +964-770-193-2570 (S.J.M.); +964-770-505-6061 (K.M.O.)
| | - Akam K. Salih
- Department of Chemistry, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46002, Iraq; (A.K.S.); (M.A.M.R.); (K.A.A.)
| | - Mohammad Amin M. Rashid
- Department of Chemistry, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46002, Iraq; (A.K.S.); (M.A.M.R.); (K.A.A.)
| | - Khalid M. Omer
- Department of Chemistry, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46002, Iraq; (A.K.S.); (M.A.M.R.); (K.A.A.)
- Komar Research Center (KRC), Komar University of Science and Technology, Kurdistan Regional Government, Sulaimani 46002, Iraq
- Correspondence: (S.J.M.); (K.M.O.); Tel.: +964-770-193-2570 (S.J.M.); +964-770-505-6061 (K.M.O.)
| | - Karzan A. Abdalkarim
- Department of Chemistry, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46002, Iraq; (A.K.S.); (M.A.M.R.); (K.A.A.)
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Pham NKT, Tran TTL, Duong TH, Trung NT, Phan DCT, Mai DT, Nguyen VK, Huynh BLC, Nguyen TAT, Tran TD, Tran TNM, Nguyen TP. Ricicomin A, a new alkaloid from the leaves of Ricinus communis Linn. Nat Prod Res 2020; 36:1973-1979. [DOI: 10.1080/14786419.2020.1839456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Thi Thao Linh Tran
- Faculty of Environmental Science, Sai Gon University, Ho Chi Minh City, Vietnam
| | - Thuc Huy Duong
- Faculty of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modeling, Faculty of Natural Sciences, Quy Nhon University, Quy Nhon City, Vietnam
| | - Dang Cam Tu Phan
- Laboratory of Computational Chemistry and Modeling, Faculty of Natural Sciences, Quy Nhon University, Quy Nhon City, Vietnam
| | - Dinh Tri Mai
- Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Bioactive Compounds Laboratory, Institute of Chemical Technology, Vietnam Academy of Science and Technology, Thanh Loc, Ho Chi Minh City, Vietnam
| | - Van Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Bui Linh Chi Huynh
- Department of Nature, Dong Nai University, Đồng Nai, Dong Nai Province, Vietnam
| | | | - Trong Duc Tran
- GeneCology Research Centre, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Thi Ngoc Mai Tran
- Institute of Applied Sciences, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Tan Phat Nguyen
- Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Bioactive Compounds Laboratory, Institute of Chemical Technology, Vietnam Academy of Science and Technology, Thanh Loc, Ho Chi Minh City, Vietnam
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Lin CY, Boxer SG. Unusual Spectroscopic and Electric Field Sensitivity of Chromophores with Short Hydrogen Bonds: GFP and PYP as Model Systems. J Phys Chem B 2020; 124:9513-9525. [DOI: 10.1021/acs.jpcb.0c07730] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Chi-Yun Lin
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Steven G. Boxer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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Jurczak E, Mazurek AH, Szeleszczuk Ł, Pisklak DM, Zielińska-Pisklak M. Pharmaceutical Hydrates Analysis-Overview of Methods and Recent Advances. Pharmaceutics 2020; 12:pharmaceutics12100959. [PMID: 33050621 PMCID: PMC7601571 DOI: 10.3390/pharmaceutics12100959] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/26/2020] [Accepted: 10/07/2020] [Indexed: 11/16/2022] Open
Abstract
This review discusses a set of instrumental and computational methods that are used to characterize hydrated forms of APIs (active pharmaceutical ingredients). The focus has been put on highlighting advantages as well as on presenting some limitations of the selected analytical approaches. This has been performed in order to facilitate the choice of an appropriate method depending on the type of the structural feature that is to be analyzed, that is, degree of hydration, crystal structure and dynamics, and (de)hydration kinetics. The presented techniques include X-ray diffraction (single crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD)), spectroscopic (solid state nuclear magnetic resonance spectroscopy (ssNMR), Fourier-transformed infrared spectroscopy (FT-IR), Raman spectroscopy), thermal (differential scanning calorimetry (DSC), thermogravimetric analysis (TGA)), gravimetric (dynamic vapour sorption (DVS)), and computational (molecular mechanics (MM), Quantum Mechanics (QM), molecular dynamics (MD)) methods. Further, the successful applications of the presented methods in the studies of hydrated APIs as well as studies on the excipients' influence on these processes have been described in many examples.
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Affiliation(s)
- Ewa Jurczak
- Department of Physical Chemistry, Chair and Department of Physical Pharmacy and Bioanalysis, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 str., 02-093 Warsaw, Poland; (E.J.); (A.H.M.); (D.M.P.)
| | - Anna Helena Mazurek
- Department of Physical Chemistry, Chair and Department of Physical Pharmacy and Bioanalysis, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 str., 02-093 Warsaw, Poland; (E.J.); (A.H.M.); (D.M.P.)
| | - Łukasz Szeleszczuk
- Department of Physical Chemistry, Chair and Department of Physical Pharmacy and Bioanalysis, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 str., 02-093 Warsaw, Poland; (E.J.); (A.H.M.); (D.M.P.)
- Correspondence: ; Tel.: +48-501-255-121
| | - Dariusz Maciej Pisklak
- Department of Physical Chemistry, Chair and Department of Physical Pharmacy and Bioanalysis, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 str., 02-093 Warsaw, Poland; (E.J.); (A.H.M.); (D.M.P.)
| | - Monika Zielińska-Pisklak
- Department of Biomaterials Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 str., 02-093 Warsaw, Poland;
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48
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Kim JH, Lagojda A, Kuehne D, Tshitenge DT, Chaudhuri S, Walker DP, Head G. Determination of Cotton as a Larval Feeding Source for Lepidopteran Moths Using a Derivative from Cotton Metabolites as a Marker by LC-MS/MS Method. J Chem Ecol 2020; 46:956-966. [DOI: 10.1007/s10886-020-01219-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/12/2020] [Accepted: 09/09/2020] [Indexed: 11/28/2022]
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Dong H, Dong S, Erik Hansen P, Stagos D, Lin X, Liu M. Progress of Bromophenols in Marine Algae from 2011 to 2020: Structure, Bioactivities, and Applications. Mar Drugs 2020; 18:E411. [PMID: 32759739 PMCID: PMC7459620 DOI: 10.3390/md18080411] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 07/24/2020] [Accepted: 07/25/2020] [Indexed: 12/11/2022] Open
Abstract
Marine algae contain various bromophenols that have been shown to possess a variety of biological activities, including antiradical, antimicrobial, anticancer, antidiabetic, anti-inflammatory effects, and so on. Here, we briefly review the recent progress of these marine algae biomaterials and their derivatives from 2011 to 2020, with respect to structure, bioactivities, and their potential application as pharmaceuticals.
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Affiliation(s)
- Hui Dong
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (H.D.); (S.D.)
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Songtao Dong
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (H.D.); (S.D.)
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Poul Erik Hansen
- Department of Science and Environment, Roskilde University, 4000 Roskilde, Denmark;
| | - Dimitrios Stagos
- Department of Biochemistry and Biotechnology, School of Health Sciences, University of Thessaly, Biopolis, 41500 Larissa, Greece;
| | - Xiukun Lin
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, 319 Zhongshan Road, Jiangyang, Luzhou 646000, China;
| | - Ming Liu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (H.D.); (S.D.)
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
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50
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Vlasiou MC, Pafiti KS. Chromium Coordination Compounds with Antimicrobial Activity: Synthetic Routes, Structural Characteristics, and Antibacterial Activity. THE OPEN MEDICINAL CHEMISTRY JOURNAL 2020. [DOI: 10.2174/1874104502014010001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A major threat to public health worldwide is that the antimicrobial activity of the established drugs is constantly reduced due to the resistance that bacteria develop throughout the years. Some transition metal complexes show higher antibacterial activity against several bacteria compared to those of clinically used antibiotics. Novel classes of molecules provide new challenges and seem promising to solve the crisis that the overuse of antibiotics has led over the last years. This review discusses the challenges of chromium-based metallodrugs as antimicrobial agents. In particular, the synthetic routes, the structural characteristics, as well as the antimicrobial activity of 32 chromium (III) complexes have been presented.
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