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Xu C, Wu S, Liu P, Huang Y, Chen Y, Ding G, Jia S. Computational identification and analysis of CNP0269688 as a natural product inhibitor disrupting the interaction between the HIV matrix domain and tRNA. Front Chem 2024; 12:1450339. [PMID: 39286001 PMCID: PMC11403411 DOI: 10.3389/fchem.2024.1450339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Accepted: 07/29/2024] [Indexed: 09/19/2024] Open
Abstract
Our research is dedicated to combating HIV by targeting its Matrix (MA) domain, which is crucial for viral assembly and replication. This strategy specifically aims to interrupt early-stage infection and deter drug resistance by focusing on this essential domain. Due to the MA domain's conservation across different HIV strains, our approach promises broad-spectrum efficacy, which is particularly crucial in regions marked by significant genetic diversity and resistance issues. In our study, we introduce CNP0269688, a natural product that exhibits high affinity for the HIV-1 Matrix. Through detailed molecular dynamics simulations, we have assessed the compound's structural stability and interaction dynamics, particularly its potential to hinder Protein-tRNA interactions. This analysis lays the groundwork for future experimental investigations. Our efforts are steps toward enhancing HIV treatment, reducing viral transmission, and curbing drug resistance, with the ultimate aim of controlling and eradicating the pandemic, thereby contributing significantly to public health and scientific advancement.
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Affiliation(s)
- Chengjie Xu
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Songtao Wu
- School of Medicine, Zhejiang University, Hangzhou, China
| | - Pengju Liu
- School of Medicine, Zhejiang University, Hangzhou, China
| | - Yao Huang
- School of Medicine, Zhejiang University, Hangzhou, China
| | - Yuchao Chen
- School of Medicine, Zhejiang University, Hangzhou, China
| | - Guoping Ding
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Engineering Research Center of Cognitive Healthcare, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Shengnan Jia
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Engineering Research Center of Cognitive Healthcare, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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2
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Virant M, Štrbac P, Krawczuk A, Milašinović V, Stanić P, Lozinšek M, Molčanov K. Charge Density Study of Two-Electron Four-Center Bonding in a Dimer of Tetracyanoethylene Radical Anions as a Benchmark for Two-Electron Multicenter Bonding. CRYSTAL GROWTH & DESIGN 2024; 24:6187-6195. [PMID: 39131445 PMCID: PMC11311126 DOI: 10.1021/acs.cgd.4c00342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 07/09/2024] [Accepted: 07/09/2024] [Indexed: 08/13/2024]
Abstract
The dimer of the tetracyanoethylene (TCNE) radical anions represents the simplest and the best studied case of two-electron multicenter covalent bonding (2e/mc or pancake bonding). The model compound, N-methylpyridinium salt of TCNE•-, is diamagnetic, meaning that the electrons in two contiguous radicals are paired and occupy a HOMO orbital which spans two TCNE•- radicals. Charge density in this system is studied as a benchmark for comparison of charge densities in other pancake-bonded radical systems. Two electrons from two contiguous radicals indeed form a bonding electron pair, which is distributed between two central ethylene groups in the dimer, i.e., between four carbon atoms. The topology of electron density reveals two bond critical points between the central ethylene groups in the dimer, with maximum electron density of 0.185 e Å-3; the corresponding theoretical value is 0.118 e Å-3.
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Affiliation(s)
- Miha Virant
- Jožef
Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
| | - Petar Štrbac
- Rud̵er
Bošković Institute, Bijenička 54, HR-10000 Zagreb, Croatia
| | - Anna Krawczuk
- University
of Göttingen, Tammanstrasse 4, D-37077 Gottingen, Germany
| | - Valentina Milašinović
- Jožef
Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
- Rud̵er
Bošković Institute, Bijenička 54, HR-10000 Zagreb, Croatia
| | - Petra Stanić
- Rud̵er
Bošković Institute, Bijenička 54, HR-10000 Zagreb, Croatia
| | - Matic Lozinšek
- Jožef
Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
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Motovilov KA, Mostert AB. Melanin: Nature's 4th bioorganic polymer. SOFT MATTER 2024; 20:5635-5651. [PMID: 39012013 DOI: 10.1039/d4sm00491d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
The pigments known as the melanins are widely recognized for their responsibility in the coloration of human skin, eyes, hair, and minimising the harmful effects of solar ultraviolet radiation. But specialists are aware that the melanins are present in all living kingdoms, barring viruses, and have functionality that extends beyond neutralizing ionising radiation. The ubiquitous presence of melanin in almost all human organs, recognized in recent years, as well as the presence of melanin in organisms that are evolutionarily distant from each other, indicate the fundamental importance of this class of material for all life forms. In this review, we argue for the need to accept melanins as the fourth primordial class of biological polymers, along with nucleic acids, proteins and polysaccharides. We consistently compare the properties of these canonical biological polymers with the properties of melanin and highlight key features that fundamentally distinguish melanins, their function and its mysteries.
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Affiliation(s)
- K A Motovilov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Institutsky Lane 9, Dolgoprudny 141701, Moscow Region, Russia.
| | - A B Mostert
- Department of Physics and Centre for Integrative Semiconductor Materials, Swansea University Bay Campus, Fabian Way, Swansea SA1 8EN, UK
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Abdi G, Gryl M, Sławek A, Kowalewska E, Mazur T, Podborska A, Mech K, Zawal P, Pritam A, Kmita A, Alluhaibi L, Maximenko A, Vijayakumar C, Szaciłowski K. Influence of crystal structure and composition on optical and electronic properties of pyridinium-based bismuth iodide complexes. Dalton Trans 2023; 52:14649-14662. [PMID: 37791584 DOI: 10.1039/d3dt02910g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
This study investigates the impacts of structure and composition on the optical and electronic properties of a series of pyridinium-based bismuth iodide complexes. Organic substrates with various functional groups, such as 4-aminopyridine (4-Ampy), 4-methylpyridine (4-Mepy), 4-dimethylaminopyridine (4-Dmapy), and 4-pyridinecarbonitrile (4-CNpy) with different electron-donating and electron-withdrawing groups at the para position of the pyridine ring were employed. Crystallographic analysis reveals various bismuth iodide structures, including 1D chains and discrete 0D motifs. The optical band gap of these materials, identified via diffuse reflectance spectroscopy (DRS) and verified with density functional theory (DFT) calculations, is influenced by the crystal packing and stabilising interactions. Through a comprehensive analysis, including Hirshfeld surface (HS) and void assessment, the study underscores the influence of noncovalent intermolecular interactions on crystal packing. Spectroscopic evaluations provide insights into electronic interactions, elucidating the role of electron donor and acceptor substituents within the lattice. Thermogravimetric differential thermal analysis (TG-DTA) indicates structural stability up to 250 °C. Linear sweep voltammetry (LSV) reveals significant conductivity in the range of 10-20 mS per pixel at 298.15 K. X-ray absorption spectroscopy (XAS) at the Bi L3 edge indicates a similar oxidation state and electronic environment across all samples, underscoring the role of bismuth centres surrounded by iodides.
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Affiliation(s)
- Gisya Abdi
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Marlena Gryl
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
| | - Andrzej Sławek
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Ewelina Kowalewska
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Tomasz Mazur
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Agnieszka Podborska
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Krzysztof Mech
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Piotr Zawal
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Anurag Pritam
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Angelika Kmita
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
| | - Lulu Alluhaibi
- National Synchrotron Radiation Centre SOLARIS, Czerwone Maki 98, 30-392 Kraków, Poland
| | - Alexey Maximenko
- National Synchrotron Radiation Centre SOLARIS, Czerwone Maki 98, 30-392 Kraków, Poland
| | - Chakkooth Vijayakumar
- Photosciences and Photonics Section, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695 019, India
| | - Konrad Szaciłowski
- Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kawiory 30, 30-055 Kraków, Poland.
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Hriz K, Teka S, Zrida H, Gharbi S, El Sofany WI, Jebnouni A, Majdoub M. Effect of Cyano and Tetrazole Side Groups on the Photophysical and Chelating Properties of Anthracene‐Based Polymers. ChemistrySelect 2023. [DOI: 10.1002/slct.202204397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Khaled Hriz
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA) Faculté des Sciences de Monastir Bd. de l'Environnement Université de Monastir 5019 Monastir Tunisia
| | - Safa Teka
- College of Science Department of Chemistry University of Hail Hai'l KSA
| | - Habiba Zrida
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA) Faculté des Sciences de Monastir Bd. de l'Environnement Université de Monastir 5019 Monastir Tunisia
| | - Samar Gharbi
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA) Faculté des Sciences de Monastir Bd. de l'Environnement Université de Monastir 5019 Monastir Tunisia
| | | | - Achref Jebnouni
- College of Public Health Department of Public Health University of Hail Hai'l KSA
| | - Mustapha Majdoub
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA) Faculté des Sciences de Monastir Bd. de l'Environnement Université de Monastir 5019 Monastir Tunisia
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Silva EC, Soares VR, Fajardo AR. Removal of pharmaceuticals from aqueous medium by alginate/polypyrrole/ZnFe 2O 4 beads via magnetic field enhanced adsorption. CHEMOSPHERE 2023; 316:137734. [PMID: 36608886 DOI: 10.1016/j.chemosphere.2022.137734] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/07/2022] [Accepted: 12/31/2022] [Indexed: 06/17/2023]
Abstract
The physicochemical and structural characteristics of the magnetic materials can be modulable due to exposition to a magnetic field, which allows, for example, to enhance its adsorption performance. In this sense, this study describes the preparation of magnetic beads of alginate/polypyrrole/ZnFe2O4 (Alg/PPy/ZnFe2O4) and investigates the effect of an external magnetic field (EMF) on their adsorption performance towards two overconsumed drugs, acetaminophen (ACT) and ibuprofen (IBU). Characterization analyses confirmed the composite formation and magnetic nature of Alg/PPy/ZnFe2O4. Conversely to the pristine beads (Alg/PPy), the presence of an EMF altered the swelling and pHPZC behavior of the magnetic beads, indicating that these properties are affected by this external stimulus. Batch experiments revealed that the amount of ACT and IBU adsorbed by Alg/PPy/ZnFe2O4 in 60-70 min is appreciably high (106.7 ad 108.2 mg/g). The presence of an EMF modulated the structure of Alg/PPy/ZnFe2O4 beads enhancing their adsorption capacity towards ACT and IBU by 14% and 12% compared to Alg/PPy. Kinetic analysis revealed that the adsorption of both drugs on Alg/PPy/ZnFe2O4 followed a pseudo-second-order. Besides, the adsorption mechanism was fitted by the Freundlich isotherm. Reuse experiments showed that the magnetic beads keep a high adsorption capacity for both drugs even after ten consecutive reuse cycles. The results presented here suggest that magnetic-responsive materials like Alg/PPy/ZnFe2O4 are prominent and modulable tools for improving the treatment of water/wastewater containing this class of contaminants.
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Affiliation(s)
- Emilly C Silva
- Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão s/n, 96010-900, Pelotas, RS, Brazil
| | - Victória R Soares
- Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão s/n, 96010-900, Pelotas, RS, Brazil
| | - André R Fajardo
- Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão s/n, 96010-900, Pelotas, RS, Brazil.
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Ridgway H, Ntallis C, Chasapis CT, Kelaidonis K, Matsoukas MT, Plotas P, Apostolopoulos V, Moore G, Tsiodras S, Paraskevis D, Mavromoustakos T, Matsoukas JM. Molecular Epidemiology of SARS-CoV-2: The Dominant Role of Arginine in Mutations and Infectivity. Viruses 2023; 15:309. [PMID: 36851526 PMCID: PMC9963001 DOI: 10.3390/v15020309] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/17/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
Background, Aims, Methods, Results, Conclusions: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a global challenge due to its ability to mutate into variants that spread more rapidly than the wild-type virus. The molecular biology of this virus has been extensively studied and computational methods applied are an example paradigm for novel antiviral drug therapies. The rapid evolution of SARS-CoV-2 in the human population is driven, in part, by mutations in the receptor-binding domain (RBD) of the spike (S-) protein, some of which enable tighter binding to angiotensin-converting enzyme (ACE2). More stable RBD-ACE2 association is coupled with accelerated hydrolysis by proteases, such as furin, trypsin, and the Transmembrane Serine Protease 2 (TMPRSS2) that augment infection rates, while inhibition of the 3-chymotrypsin-like protease (3CLpro) can prevent the viral replication. Additionally, non-RBD and non-interfacial mutations may assist the S-protein in adopting thermodynamically favorable conformations for stronger binding. This study aimed to report variant distribution of SARS-CoV-2 across European Union (EU)/European Economic Area (EEA) countries and relate mutations with the driving forces that trigger infections. Variants' distribution data for SARS-CoV-2 across EU/EEA countries were mined from the European Centre for Disease Prevention and Control (ECDC) based on the sequence or genotyping data that are deposited in the Global Science Initiative for providing genomic data (GISAID) and The European Surveillance System (TESSy) databases. Docking studies performed with AutoDock VINA revealed stabilizing interactions of putative antiviral drugs, e.g., selected anionic imidazole biphenyl tetrazoles, with the ACE2 receptor in the RBD-ACE2 complex. The driving forces of key mutations for Alpha, Beta, Gamma, Delta, Epsilon, Kappa, Lambda, and Omicron variants, which stabilize the RBD-ACE2 complex, were investigated by computational approaches. Arginine is the critical amino acid in the polybasic furin cleavage sites S1/S2 (681-PRRARS-686) S2' (814-KRS-816). Critical mutations into arginine residues that were found in the delta variant (L452R, P681R) and may be responsible for the increased transmissibility and morbidity are also present in two widely spreading omicron variants, named BA.4.6 and BQ.1, where mutation R346T in the S-protein potentially contributes to neutralization escape. Arginine binders, such as Angiotensin Receptor Blockers (ARBs), could be a class of novel drugs for treating COVID-19.
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Affiliation(s)
- Harry Ridgway
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Melbourne 8001, VIC, Australia
- AquaMem Consultants, Rodeo, NM 88056, USA
| | - Charalampos Ntallis
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
| | - Christos T. Chasapis
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
| | | | | | - Panagiotis Plotas
- Laboratory of Primary Health Care, School of Health Rehabilitation Sciences, University of Patras, 26504 Patras, Greece
| | - Vasso Apostolopoulos
- Institute for Health and Sport, Victoria University, Melbourne 3030, VIC, Australia
- Immunology Program, Australian Institute for Musculoskeletal Science (AIMSS), Melbourne 3021, VIC, Australia
| | - Graham Moore
- Pepmetics Inc., 772 Murphy Place, Victoria, BC V6Y 3H4, Canada
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Sotirios Tsiodras
- 4th Department of Internal Medicine, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Dimitrios Paraskevis
- Department of Hygiene Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Thomas Mavromoustakos
- Department of Chemistry, National and Kapodistrian University of Athens, 11571 Athens, Greece
| | - John M. Matsoukas
- NewDrug PC, Patras Science Park, 26504 Patras, Greece
- Institute for Health and Sport, Victoria University, Melbourne 3030, VIC, Australia
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
- Department of Chemistry, University of Patras, 26504 Patras, Greece
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Reza Masoodi H, Sadat Pourhosseini R, Bagheri S. The role of nature of aromatic ring on cooperativity between π–π stacking and ion–π interactions: a computational study. COMPUT THEOR CHEM 2023. [DOI: 10.1016/j.comptc.2023.114022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Olaniyan PO, Nadim MM, Subir M. Detection and binding interactions of pharmaceutical contaminants using quartz crystal microbalance - Role of adsorbate structure and surface functional group on adsorption. CHEMOSPHERE 2023; 311:137075. [PMID: 36336013 DOI: 10.1016/j.chemosphere.2022.137075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/08/2022] [Accepted: 10/28/2022] [Indexed: 06/16/2023]
Abstract
HYPOTHESIS Emerging contaminants (ECs) can interact with soft solid/aqueous interfaces of particulate organic matter and microplastics in the aquatic environment but to what extent? It is hypothesized that EC adsorption can be detected using quartz crystal microbalance (QCM), a sensitive gravimetric tool, and their adsorption energetics and uptake capacity can be measured for various substrates of distinct functional group. This in turn reveals the specific vs. nonspecific interactions. EXPERIMENTS QCM has been used to detect and measure the adsorption of selected pharmaceuticals, amlodipine (AMP) and carbamazepine (CBZ), onto butyl, carboxyl, amine, and phenyl functionalized self-assembled monolayers (SAMs), mapping out the hydrophobic effect, H-bonding capability, and π- interactions. Adsorption free energy (ΔGads) and maximum interfacial concentration (cmax) for these surfaces are compared. Solvatochromic studies to elucidate the likelihood of H-bonding interactions for CBZ and AMP have been conducted using UV-Vis absorption spectroscopy. FINDINGS Amlodipine and carbamazepine adsorb onto butyl/aqueous interface with respective ΔGads values of -35.8 ± 1.1 and -37.7 ± 0.1 kJ/mol. Nonspecific interaction allows a greater extent of cmax on the hydrophobic/aqueous interface. CBZ does not bind to the phenyl surface. AMP and CBZ exhibit H-bonding and show proclivity for the amine and carboxyl SAMs. Interfacial chemical environment and adsorbate structural properties play a significant role on EC adsorption.
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Affiliation(s)
| | | | - Mahamud Subir
- Department of Chemistry, Ball State University, Muncie, IN, USA.
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An S, Jeon EJ, Han SY, Jeon J, Lee MJ, Kim S, Shin M, Cho SW. pH-Universal Catechol-Amine Chemistry for Versatile Hyaluronic Acid Bioadhesives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2202729. [PMID: 35989097 DOI: 10.1002/smll.202202729] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Catechol, a major mussel-inspired underwater adhesive moiety, has been used to develop functional adhesive hydrogels for biomedical applications. However, oxidative catechol chemistry for interpolymer crosslinking and adhesion is exclusively effective under alkaline conditions, with limited applications in non-alkaline conditions. To overcome this limitation, pH-universal catechol-amine chemistry to recapitulate naturally occurring biochemical events induced by pH variation in the mussel foot is suggested. Aldehyde moieties are introduced to hyaluronic acid (HA) by partial oxidation, which enables dual-mode catechol tethering to the HA via both stable amide and reactive secondary amine bonds. Because of the presence of additional reactive amine groups, the resultant aldehyde-modified HA conjugated with catechol (AH-CA) is effectively crosslinked in acidic and neutral pH conditions. The AH-CA hydrogel exhibits not only fast gelation via active crosslinking regardless of pH conditions, but also strong adhesion and excellent biocompatibility. The hydrogel enables rapid and robust wound sealing and hemostasis in neutral and alkaline conditions. The hydrogel also mediates effective therapeutic stem cell and drug delivery even in dynamic and harsh environments, such as a motile heart and acidic stomach. Therefore, the AH-CA hydrogel can serve as a versatile biomaterial in a wide range of pH conditions in vivo.
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Affiliation(s)
- Soohwan An
- Department of Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
| | - Eun Je Jeon
- Department of Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
- CellArtgen Inc., Seoul, 03722, Republic of Korea
| | - Seung Yeop Han
- Department of Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jihoon Jeon
- Department of Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
| | - Mi Jeong Lee
- Department of Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
| | - Sooyeon Kim
- Department of Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
| | - Mikyung Shin
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Seung-Woo Cho
- Department of Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
- CellArtgen Inc., Seoul, 03722, Republic of Korea
- Center for Nanomedicine, Institute for Basic Science (IBS), Seoul, 03722, Republic of Korea
- Graduate Program of Nano Biomedical Engineering (NanoBME), Advanced Science Institute, Yonsei University, Seoul, 03722, Republic of Korea
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11
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Antiferromagnetically coupled iso-structural CrIII, MnIII and FeIII complexes of a tetradentate Schiff base ligand derived from o-phenylenediamine. TRANSIT METAL CHEM 2022. [DOI: 10.1007/s11243-022-00510-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Molčanov K, Milašinović V, Kojić-Prodić B, Maltar-Strmečki N, You J, Šantić A, Kanižaj L, Stilinović V, Fotović L. Semiconductive 2D arrays of pancake-bonded oligomers of partially charged TCNQ radicals. IUCRJ 2022; 9:449-467. [PMID: 35844480 PMCID: PMC9252159 DOI: 10.1107/s2052252522004717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 05/03/2022] [Indexed: 06/15/2023]
Abstract
Multicentre two-electron (mc/2e or 'pancake bonding') bonding between 7,7,8,8-tetra-cyano-quinodi-methane (TCNQ) radical anions was studied on its 14 novel salts with planar organic cations. The formal charges of the TCNQδ- moieties are -1/2 and -2/3, and they form mc/2e bonded dimers, trimers and tetramers which are further stacked into extended arrays. Multicentre bonding within these oligomers is characterized by short interplanar separations of 2.9-3.2 Å; distances between the oligomers are larger, typically >3.3 Å. The stacks are laterally connected by C-H⋯N hydrogen bonding, forming 2D arrays. The nature of mc/2e bonding is characterized by structural, magnetic and electrical data. The compounds are found to be semiconductors, and high conductivity [10-2 (Ω cm)-1] correlates with short interplanar distances between pancake-bonded oligomers.
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Affiliation(s)
- Krešimir Molčanov
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Valentina Milašinović
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Biserka Kojić-Prodić
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Nadica Maltar-Strmečki
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Jiangyang You
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Ana Šantić
- Department of Materials Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Lidija Kanižaj
- Department of Materials Physics, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Vladimir Stilinović
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, Zagreb HR-10000, Croatia
| | - Luka Fotović
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, Zagreb HR-10000, Croatia
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13
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Mechanism of Caspase-1 Inhibition by Four Anti-inflammatory Drugs Used in COVID-19 Treatment. Int J Mol Sci 2022; 23:ijms23031849. [PMID: 35163769 PMCID: PMC8837144 DOI: 10.3390/ijms23031849] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 01/27/2023] Open
Abstract
The inflammatory protease caspase-1 is associated with the release of cytokines. An excessive number of cytokines (a “cytokine storm”) is a dangerous consequence of COVID-19 infection and has been indicated as being among the causes of death by COVID-19. The anti-inflammatory drug colchicine (which is reported in the literature to be a caspase-1 inhibitor) and the corticosteroid drugs, dexamethasone and methylprednisolone, are among the most effective active compounds for COVID-19 treatment. The SERM raloxifene has also been used as a repurposed drug in COVID-19 therapy. In this study, inhibition of caspase-1 by these four compounds was analyzed using computational methods. Our aim was to see if the inhibition of caspase-1, an important biomolecule in the inflammatory response that triggers cytokine release, could shed light on how these drugs help to alleviate excessive cytokine production. We also measured the antioxidant activities of dexamethasone and colchicine when scavenging the superoxide radical using cyclic voltammetry methods. The experimental findings are associated with caspase-1 active site affinity towards these compounds. In evaluating our computational and experimental results, we here formulate a mechanism for caspase-1 inhibition by these drugs, which involves the active site amino acid Cys285 residue and is mediated by a transfer of protons, involving His237 and Ser339. It is proposed that the molecular moiety targeted by all of these drugs is a carbonyl group which establishes a S(Cys285)–C(carbonyl) covalent bond.
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14
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Yadav K, Ghosh S, Barak A, Schaefer W, Subramanian R. Phenylalanine stacking enhances the red fluorescence of biliverdin IXα on UV excitation in sandercyanin fluorescent protein. FEBS Lett 2022; 596:796-805. [PMID: 35020202 DOI: 10.1002/1873-3468.14281] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/18/2021] [Accepted: 12/28/2021] [Indexed: 01/20/2023]
Abstract
Biliverdin IXα (BV) binds to several prokaryotic and eukaryotic proteins. How nature exploits the versatility of BV's properties is not fully understood. Unlike free BV, the Sandercyanin fluorescent protein bound to BV (SFP-BV) shows enhanced red fluorescence (675 nm) on excitation in the UV region (380 nm). Site-directed mutagenesis showed that the BV complex of two SFP variants, F55A and E79A, resulted in the loss of red fluorescence. Crystal structures of the complexes of these proteins with BV show the absence of stacking interactions of the F55 phenyl ring with BV. BV changes from ZZZssa conformation in the wild-type to ZZZsss conformation in the variants. In the nonfluorescent mutants, the lowest excited state is destabilized, resulting in nonradiative decay.
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Affiliation(s)
- Keerti Yadav
- Institute for Stem Cell Science and Regenerative Medicine, Bangalore, India.,Manipal Academy of Higher Education, Manipal University, Madhav Nagar, India
| | - Swagatha Ghosh
- Institute for Stem Cell Science and Regenerative Medicine, Bangalore, India.,Department of Chemistry and Molecular Biology, University of Gothenburg, Sweden
| | - Arvind Barak
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India
| | - Wayne Schaefer
- Department of Biological Sciences, The University of Wisconsin-Milwaukee at Washington County, West Bend, WI, USA
| | - Ramaswamy Subramanian
- Institute for Stem Cell Science and Regenerative Medicine, Bangalore, India.,Department of Biological Sciences and Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
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15
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Venkatesan P, Thamotharan S, Percino MJ, Ilangovan A. Intramolecular resonance assisted N–H⋅⋅⋅O=C hydrogen bond and weak noncovalent interactions in two asymmetrically substituted geminal amido-esters: Crystal structures and quantum chemical exploration. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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16
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Li W, Tikhonov DS, Schnell M. Double Proton Transfer Across a Table: The Formic Acid Dimer-Fluorobenzene Complex. Angew Chem Int Ed Engl 2021; 60:25674-25679. [PMID: 34448334 PMCID: PMC9293461 DOI: 10.1002/anie.202108242] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/06/2021] [Indexed: 11/30/2022]
Abstract
Proton transfer via tunneling is a fundamental quantum‐mechanical phenomenon. We report rotational spectroscopy measurements of this process in the complex of the formic acid dimer with fluorobenzene. The assignment of the spectrum indicates that this complex exists in the form of a π–π stacked structure. Each rotational transition of the parent isotopologue exhibits splitting. Isotopic substitution experiments show that the spectral splitting results from double‐proton transfer tunneling in the formic acid dimer. Presence of fluorobenzene as a neighboring molecule does not quench the double proton transfer in the formic acid dimer but decreases its tunneling splitting from 341(3) MHz to 267.608(1) MHz. Calculations suggest that the presence of the weakly bounded fluorobenzene does not influence the activation energy of the proton transfer. The fluorobenzene is reoriented with respect to the formic acid dimer during the course of the reaction, slowing down the proton transfer motion.
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Affiliation(s)
- Weixing Li
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, 24118, Kiel, Germany.,Current address: Department of Chemistry, Fudan University, Songhu Rd. 2005, 200438, Shanghai, China
| | - Denis S Tikhonov
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, 24118, Kiel, Germany
| | - Melanie Schnell
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, 24118, Kiel, Germany
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17
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Substituent effects on the regium-π stacking interactions between Au 6 cluster and substituted benzene. J Mol Model 2021; 27:328. [PMID: 34687368 DOI: 10.1007/s00894-021-04944-5] [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: 07/14/2021] [Accepted: 10/07/2021] [Indexed: 11/27/2022]
Abstract
The regium-π stacking interactions in the Au6···PhX (X = H, CH3, OH, OCH3, NH2, F, Cl, Br, CN, NO2) complexes are studied using quantum chemical methods. The present study focuses on the different effects of electron-donating and electron-withdrawing substituent. The structure and binding strength of the complexes are examined. The interactions between Au6 cluster and various substituted benzene become strengthened relative to the Au6···benzene complex. The interaction region indicator analysis was performed, and the interaction region and interaction between the substituent and Au6 cluster are discussed. It is found that the substituent effects on the regium-π stacking interactions between Au6 cluster and substituted benzene are different from π···π interactions of benzene dimer. Energy decomposition analysis was carried out to study the nature of regium-π stacking interactions, and the substituent effects are mainly reflected on the electrostatic interaction and dispersion.
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18
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Li W, Tikhonov DS, Schnell M. Double Proton Transfer Across a Table: The Formic Acid Dimer–Fluorobenzene Complex. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Weixing Li
- Deutsches Elektronen-Synchrotron DESY Notkestr. 85 22607 Hamburg Germany
- Institute of Physical Chemistry Christian-Albrechts-Universität zu Kiel Max-Eyth-Str. 1 24118 Kiel Germany
- Current address: Department of Chemistry Fudan University Songhu Rd. 2005 200438 Shanghai China
| | - Denis S. Tikhonov
- Deutsches Elektronen-Synchrotron DESY Notkestr. 85 22607 Hamburg Germany
- Institute of Physical Chemistry Christian-Albrechts-Universität zu Kiel Max-Eyth-Str. 1 24118 Kiel Germany
| | - Melanie Schnell
- Deutsches Elektronen-Synchrotron DESY Notkestr. 85 22607 Hamburg Germany
- Institute of Physical Chemistry Christian-Albrechts-Universität zu Kiel Max-Eyth-Str. 1 24118 Kiel Germany
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19
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Milašinović V, Molčanov K, Krawczuk A, Bogdanov NE, Zakharov BA, Boldyreva EV, Jelsch C, Kojić-Prodić B. Charge density studies of multicentre two-electron bonding of an anion radical at non-ambient temperature and pressure. IUCRJ 2021; 8:644-654. [PMID: 34258012 PMCID: PMC8256703 DOI: 10.1107/s2052252521005273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 05/18/2021] [Indexed: 06/13/2023]
Abstract
The variation of charge density of two-electron multicentre bonding (pancake bonding) between semi-quinone radicals with pressure and temperature was studied on a salt of 5,6-di-chloro-2,3-di-cyano-semi-quinone radical anion (DDQ) with 4-cyano-N-methyl-pyridinium cation (4-CN) using the Transferable Aspheric Atom Model (TAAM) refinement. The pancake-bonded radical dimers are stacked by non-bonding π-interactions. With rising pressure, the covalent character of interactions between radicals increases, and above 2.55 GPa, the electron density indicates multicentric covalent interactions throughout the stack. The experimental charge densities were verified and corroborated by periodic DFT computations. The TAAM approach has been tested and validated for atomic resolution data measured at ambient pressure; this work shows this approach can also be applied to diffraction data obtained at pressures up to several gigapascals.
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Affiliation(s)
- Valentina Milašinović
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Krešimir Molčanov
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Anna Krawczuk
- Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, Göttingen 37077, Germany
- Faculty of Chemistry, Jagiellonian University in Krakow, Gronostajowa 2, Krakow 30-387, Poland
| | - Nikita E. Bogdanov
- Boreskov Institute of Catalysis, SB RAS, Lavrentiev Avenue 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090 Russian Federation
| | - Boris A. Zakharov
- Boreskov Institute of Catalysis, SB RAS, Lavrentiev Avenue 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090 Russian Federation
| | - Elena V. Boldyreva
- Boreskov Institute of Catalysis, SB RAS, Lavrentiev Avenue 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090 Russian Federation
| | - Christian Jelsch
- CRM2, CNRS, UMR 7036, Université de Lorraine, BP 70239 Nancy, France
| | - Biserka Kojić-Prodić
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
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20
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Scarpelli F, Ricciardi L, La Deda M, Brunelli E, Crispini A, Ghedini M, Godbert N, Aiello I. A luminescent lyotropic liquid-crystalline gel of a water-soluble Ir(III) complex. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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21
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Zaoui Y, Ramli Y, Tan SL, Tiekink ER, Chemlal L, Mague JT, Taoufik J, Faouzi MEA, Ansar M. Synthesis, structural characterisation and theoretical studies of a novel pyridazine derivative: Investigations of anti-inflammatory activity and inhibition of α-glucosidase. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130177] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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22
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Pilecky M, Závorka L, Arts MT, Kainz MJ. Omega-3 PUFA profoundly affect neural, physiological, and behavioural competences - implications for systemic changes in trophic interactions. Biol Rev Camb Philos Soc 2021; 96:2127-2145. [PMID: 34018324 DOI: 10.1111/brv.12747] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 01/01/2023]
Abstract
In recent decades, much conceptual thinking in trophic ecology has been guided by theories of nutrient limitation and the flow of elements, such as carbon and nitrogen, within and among ecosystems. More recently, ecologists have also turned their attention to examining the value of specific dietary nutrients, in particular polyunsaturated fatty acids (PUFA), among which the omega-3 PUFA, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) play a central role as essential components of neuronal cell membranes in many organisms. This review focuses on a new neuro-ecological approach stemming from the biochemical (mechanistic) and physiological (functional) role of DHA in neuronal cell membranes, in particular in conjunction with G-protein coupled receptors (GPCRs). We link the co-evolution of these neurological functions to metabolic dependency on dietary omega-3 PUFA. We outline ways in which deficiencies in dietary DHA supply may affect, cognition, vision, and behaviour, and ultimately, the biological fitness of consumers. We then review emerging evidence that changes in access to dietary omega-3 PUFA may ultimately have profound impacts on trophic interactions leading to potential changes in community structure and ecosystem functioning that, in turn, may affect the supply of DHA within and across ecosystems, including the supply for human consumption.
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Affiliation(s)
- Matthias Pilecky
- WasserCluster Lunz - Biologische Station, Inter-University Center for Aquatic Ecosystem Research, Dr. Carl-Kupelwieser Promenade 5, Lunz am See, 3293, Austria.,Department of Biomedical Research, Donau-Universität Krems, Dr. Karl Dorrek-Straße 30, Krems, 3500, Austria
| | - Libor Závorka
- WasserCluster Lunz - Biologische Station, Inter-University Center for Aquatic Ecosystem Research, Dr. Carl-Kupelwieser Promenade 5, Lunz am See, 3293, Austria
| | - Michael T Arts
- Department of Chemistry and Biology, Ryerson University, 350 Victoria St, Toronto, ON, M5B 2K3, Canada
| | - Martin J Kainz
- WasserCluster Lunz - Biologische Station, Inter-University Center for Aquatic Ecosystem Research, Dr. Carl-Kupelwieser Promenade 5, Lunz am See, 3293, Austria.,Department of Biomedical Research, Donau-Universität Krems, Dr. Karl Dorrek-Straße 30, Krems, 3500, Austria
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23
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Chen AB, Shao Q, Hall CK. Molecular simulation study of 3,4-dihydroxyphenylalanine in the context of underwater adhesive design. J Chem Phys 2021; 154:144702. [PMID: 33858170 DOI: 10.1063/5.0044173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Adhesives that can stick to multiple surface types in underwater and high moisture conditions are critical for various applications such as marine coatings, sealants, and medical devices. The analysis of natural underwater adhesives shows that L-3,4-dihydroxyphenylalanine (DOPA) and functional amyloid nanostructures are key components that contribute to the adhesive powers of these natural glues. The combination of DOPA and amyloid-forming peptides into DOPA-amyloid(-forming peptide) conjugates provides a new approach to design generic underwater adhesives. However, it remains unclear how the DOPA monomers may interact with amyloid-forming peptides and how these interactions may influence the adhesive ability of the conjugates. In this paper, we investigate the behavior of DOPA monomers, (glycine-DOPA)3 chains, and a KLVFFAE and DOPA-glycine chain conjugate in aqueous environments using molecular simulations. The DOPA monomers do not aggregate significantly at concentrations lower than 1.0M. Simulations of (glycine-DOPA)3 chains in water were done to examine the intra-molecular interactions of the chain, wherein we found that there were unlikely to be interactions detrimental to the adhesion process. After combining the alternating DOPA-glycine chain with the amyloid-forming peptide KLVFFAE into a single chain conjugate, we then simulated the conjugate in water and saw the possibility of both intra-chain folding and no chain folding in the conjugate.
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Affiliation(s)
- Amelia B Chen
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27606, USA
| | - Qing Shao
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Carol K Hall
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27606, USA
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24
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Natural Blues: Structure Meets Function in Anthocyanins. PLANTS 2021; 10:plants10040726. [PMID: 33917946 PMCID: PMC8068391 DOI: 10.3390/plants10040726] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 12/21/2022]
Abstract
Choices of blue food colourants are extremely limited, with only two options in the USA, synthetic blue no. 1 and no. 2, and a third available in Europe, patent blue V. The food industry is investing heavily in finding naturally derived replacements, with limited success to date. Here, we review the complex and multifold mechanisms whereby blue pigmentation by anthocyanins is achieved in nature. Our aim is to explain how structure determines the functionality of anthocyanin pigments, particularly their colour and their stability. Where possible, we describe the impact of progressive decorations on colour and stability, drawn from extensive but diverse physico-chemical studies. We also consider briefly how this understanding could be harnessed to develop blue food colourants on the basis of the understanding of how anthocyanins create blues in nature.
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25
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Ngilirabanga JB, Samsodien H. Pharmaceutical co‐crystal: An alternative strategy for enhanced physicochemical properties and drug synergy. NANO SELECT 2021. [DOI: 10.1002/nano.202000201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
| | - Halima Samsodien
- School of Pharmacy, Faculty of Science University of the Western Cape Bellville South Africa
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26
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Milašinović V, Molčanov K. Novel co-crystals with π-hole interactions between iodide anions and quinoid rings involving charge transfer. CrystEngComm 2021. [DOI: 10.1039/d1ce01156a] [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
Six novel co-crystals of tetrabromoquinone with iodide salts of organic cations displaying short contacts between iodide anions and the quinoid rings have been structurally characterised.
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27
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BLANGETTI M, O’SHEA DF. Crystal Structure of <i>rac</i>-4-Iodo-5-methoxy[2.2]metacylophane; A Rare Example of a Halogenated Metacyclophane with Planar Chirality. X-RAY STRUCTURE ANALYSIS ONLINE 2020. [DOI: 10.2116/xraystruct.36.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Du C, Chu H, Xiao Z, Zhong L, Zhou Y, Qin W, Liang G, Gao H. Alternating Vinylarene–Carbon Monoxide Copolymers: Simple and Efficient Nonconjugated Luminescent Macromolecules. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01792] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Cheng Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Hongling Chu
- Daqing Petrochemical Research Center of Petrochina, Daqing 163714, China
| | - Zefan Xiao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Liu Zhong
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Yusheng Zhou
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Wei Qin
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Guodong Liang
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
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29
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Kanižaj L, Vuković V, Wenger E, Jurić M, Molčanov K. Analysis of supramolecular interactions directing crystal packing of novel mononuclear chloranilate-based complexes: Different types of hydrogen bonding and π-stacking. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114723] [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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30
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Abstract
Pyrazine-based compounds are of great importance in medicinal chemistry. Due to their heteroaromatic nature, they uniquely combine properties of heteroatoms (polar interactions) with the properties of aromatic moieties (nonpolar interactions). This review summarizes results of a systematic analysis of RCSB PDB database focused on important binding interactions of pyrazine-based ligands cocrystallized in protein targets. The most frequent interaction of pyrazine was hydrogen bond to pyrazine nitrogen atom as an acceptor, followed by weak hydrogen bond with pyrazine hydrogen as donor. We also identified intramolecular hydrogen bonds within pyrazine ligands, π-interactions, coordination to metal ions, and few halogen bonds in chloropyrazines. In many cases the binding mode of the pyrazine fragment was complex, involving a combination of several interactions. We conclude that pyrazine as a molecular fragment should not be perceived as a simple aromatic isostere but rather as a readily interacting moiety of drug-like molecules with high potential for interactions to proteins.
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Affiliation(s)
- Martin Juhás
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
| | - Jan Zitko
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
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31
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Zheng J, Lu Z, Wu K, Ning GH, Li D. Coinage-Metal-Based Cyclic Trinuclear Complexes with Metal-Metal Interactions: Theories to Experiments and Structures to Functions. Chem Rev 2020; 120:9675-9742. [PMID: 32786416 DOI: 10.1021/acs.chemrev.0c00011] [Citation(s) in RCA: 111] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Among the d10 coinage metal complexes, cyclic trinuclear complexes (CTCs) or trinuclear metallocycles with intratrimer metal-metal interactions are fascinating and important metal-organic or organometallic π-acids/bases. Each CTC of characteristic planar or near-planar trimetal nine-membered rings consists of Au(I)/Ag(I)/Cu(I) cations that linearly coordinate with N and/or C atoms in ditopic anionic bridging ligands. Since the first discovery of Au(I) CTC in the 1970s, research of CTCs has involved several fundamental areas, including noncovalent and metallophilic interaction, excimer/exciplex, acid-base chemistry, metalloaromaticity, supramolecular assemblies, and host/guest chemistry. These allow CTCs to be embraced in a wide range of innovative potential applications that include chemical sensing, semiconducting, gas and liquid adsorption/separation, catalysis, full-color display, and solid-state lighting. This review aims to provide a historic and comprehensive summary on CTCs and their extension to higher nuclearity complexes and coordination polymers from the perspectives of synthesis, structure, theoretical insight, and potential applications.
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Affiliation(s)
- Ji Zheng
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou 510632, People's Republic of China
| | - Zhou Lu
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou 510632, People's Republic of China
| | - Kun Wu
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou 510632, People's Republic of China
| | - Guo-Hong Ning
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou 510632, People's Republic of China
| | - Dan Li
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou 510632, People's Republic of China
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32
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Bogdanov NE, Milašinović V, Zakharov BA, Boldyreva EV, Molčanov K. Pancake-bonding of semiquinone radicals under variable temperature and pressure conditions. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2020; 76:285-291. [PMID: 32831231 DOI: 10.1107/s2052520620002772] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 02/27/2020] [Indexed: 06/11/2023]
Abstract
The effects of temperature (100-370 K) and pressure (0-6 GPa) on the non-localized two-electron multicentric covalent bonds (`pancake bonding') in closely bound radical dimers were studied using single-crystal X-ray diffraction on a 4-cyano-N-methylpyridinium salt of 5,6-dichloro-2,3-dicyanosemiquinone radical anion (DDQ) as the sample compound. On cooling, the anisotropic structural compression was accompanied by continuous changes in molecular stacking; the discontinuities in the changes in volume and b and c cell parameters suggest that a phase transition occurs between 210 and 240 K. At a pressure of 2.55 GPa, distances between radical dimers shortened to 2.9 Å, which corresponds to distances observed in extended π-bonded polymers. Increasing pressure further to 6 GPa reduced the interplanar separation of the radicals to 2.75 Å. This may indicate that the covalent component of the interaction significantly increased, in accordance with the results of DFT calculations reported elsewhere [Molčanov et al. (2019), Cryst. Growth Des. 19, 391-402].
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Affiliation(s)
- Nikita E Bogdanov
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk, Russia 630090, Russian Federation
| | | | - Boris A Zakharov
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk, Russia 630090, Russian Federation
| | - Elena V Boldyreva
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk, Russia 630090, Russian Federation
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Sosa-Rivadeneyra MV, Vasquez-Ríos MG, Vargas-Olvera EC, Mendoza M, Varela-Caselis JL, Meza-León RL, Sánchez-Guadarrama MO, Höpfl H. Crystal structures of organic salts of chloranilic acid and 2,2′-bi(3-hydroxy-1,4-naphthoquinone) acting as proton donors to 4,4′-Bipyridine and 1,4-Diazabicyclo[2.2.2]octane: 3D networks with bifurcated N+-H···O−/O or N+-H···O/Cl synthons. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Ogueri KS, Ogueri KS, Allcock HR, Laurencin CT. A Regenerative Polymer Blend Composed of Glycylglycine ethyl ester-substituted Polyphosphazene and Poly (lactic-co-glycolic acid). ACS APPLIED POLYMER MATERIALS 2020; 2:1169-1179. [PMID: 32699836 PMCID: PMC7375693 DOI: 10.1021/acsapm.9b00993] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In the pursuit of continuous improvement in the area of biomaterial design, blends of mixed-substituent polyphosphazenes and poly (lactic acid-glycolic acid) (PLGA) were prepared, and their morphology of phase distributions for the first time was studied. The degradation mechanism and osteocompatibility of the blends were also evaluated for their use as regenerative materials. Poly [(ethyl phenylalanato)25(glycine ethyl glycinato)75phosphazene](PNEPAGEG) and poly [(glycine ethyl glycinato)75(phenylphenoxy)25phosphazene](PNGEGPhPh) were blended with PLGA at various weight ratios to yield different blends, namely PNEPAGEG-PLGA 25:75, PNEPAGEG-PLGA 50:50, PNGEGPhPh-PLGA 25:75, and PNGEGPhPh-PLGA 50:50. The molecular interactions, domain sizes, and phase distributions of the blends were confirmed by atomic force microscopy (AFM) as the PNEPAGEG-PLGA and PNGEGPhPh-PLGA blends showed different domain sizes and phase distributions. Due to the extensive hydrogen bonding within the two polymer components, PNEPAGEG-PLGA exhibited small-sized domains and well-distributed morphology. While for the PNGEGPhPh-PLGA blends, the presence of phenylphenol (PhPh) caused the formation of PLGA large-sized domains as the PLGA formed a continuous phase and PNGEGPhPh constituted a dispersed phase. In addition to AFM results, scanning electron microscopy-energy dispersive X-ray spectrometry (SEM-EDS), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and Fourier transform infrared spectroscopy (FTIR) results demonstrated the miscibility of the blends. The PNEPAGEG-PLGA and PNGEGPhPh-PLGA blends presented in situ 3D interconnected porous structures upon degradation in phosphate-buffered saline (PBS) media at 37°C. However, the blends showed different mechanistic pathways to the formations of the pores. The difference in the erosion patterns could be attributed to the nature of molecular attractions that exist in the blends. Furthermore, the novel blends were able to support cell growth as compared to PLGA, and accommodate cell infiltrations, which ultimately augmented surface area for better cell-material interactions.
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Affiliation(s)
- Kenneth S. Ogueri
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Kennedy S. Ogueri
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
| | - Harry R. Allcock
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
| | - Cato T. Laurencin
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06296, USA
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35
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Efimenko ZM, Novikov AS, Ivanov DM, Piskunov AV, Vereshchagin AA, Levin OV, Bokach NA, Kukushkin VY. The (Dioximate)Ni II/I 2 System: Ligand Oxidation and Binding Modes of Triiodide Species. Inorg Chem 2020; 59:2316-2327. [PMID: 32027131 DOI: 10.1021/acs.inorgchem.9b03132] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reinvestigation of (o-benzoquinonedioximate)2Ni/I2 systems demonstrated that the reaction itself and also the crystallization conditions dramatically affect the identity of generated species. Crystallization (CHCl3, 20-25 °C) of the nickel(II) dioximate complex [Ni(bqoxH)2] (bqoxH2 = o-benzoquinonedioxime) with I2 in the 1:(1-10) molar ratios of the reactants led to several (o-benzoquinonedioximate)2Ni derivatives and/or iodine adducts [Ni(I)(bqoxH)(bqoxH2)]·3/2I2, [Ni(I3)(bqoxH)(bqoxH2)]·[Ni(bqoxH)2], and [Ni(I3)(bqox•-)(bqoxH2)]·I2; the latter one, featuring the anion-radical bqox•- ligand, is derived from the formal (-2H+/1e-)-oxidation of bqoxH2. In these three adducts, various types of noncovalent interactions were identified experimentally and their existence was supported theoretically. The [Ni(I3)(bqox•-)(bqoxH2)]·I2 adduct exhibits simultaneous semicoordination and coordination patterns of the triiodide ligand; this is the first recognition of the semicoordination of any polyiodide ligand to a metal center. The semicoordination noncovalent contact Ni···I3 (3.7011(10) Å) is substantially longer that the Ni-I3 coordination bond (2.8476(9) Å), and the difference in energies between these two types of linkages is 8-12 kcal/mol.
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Affiliation(s)
- Zarina M Efimenko
- Institute of Chemistry , Saint Petersburg State University , Universitetskaya Nab. 7/9 , 199034 Saint Petersburg , Russian Federation
| | - Alexander S Novikov
- Institute of Chemistry , Saint Petersburg State University , Universitetskaya Nab. 7/9 , 199034 Saint Petersburg , Russian Federation
| | - Daniil M Ivanov
- Institute of Chemistry , Saint Petersburg State University , Universitetskaya Nab. 7/9 , 199034 Saint Petersburg , Russian Federation
| | - Alexandr V Piskunov
- G.A. Razuvaev Institute of Organometallic Chemistry , Russian Academy of Sciences , Tropinina Str. 49 , 603950 Nizhny Novgorod , Russian Federation
| | - Anatoly A Vereshchagin
- Institute of Chemistry , Saint Petersburg State University , Universitetskaya Nab. 7/9 , 199034 Saint Petersburg , Russian Federation
| | - Oleg V Levin
- Institute of Chemistry , Saint Petersburg State University , Universitetskaya Nab. 7/9 , 199034 Saint Petersburg , Russian Federation
| | - Nadezhda A Bokach
- Institute of Chemistry , Saint Petersburg State University , Universitetskaya Nab. 7/9 , 199034 Saint Petersburg , Russian Federation
| | - Vadim Yu Kukushkin
- Institute of Chemistry , Saint Petersburg State University , Universitetskaya Nab. 7/9 , 199034 Saint Petersburg , Russian Federation
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36
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Rok M, Moskwa M, Dopieralski P, Medycki W, Zamponi M, Bator G. The influence of structure on the methyl group dynamics of polymorphic complexes: 6,6′-dimethyl-2,2′-dipyridyl with halo derivatives of benzoquinone acids. CrystEngComm 2020. [DOI: 10.1039/d0ce00973c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The structural analysis, neutron scattering, 1H NMR and computational methods combined to investigate new molecular complexes.
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Affiliation(s)
- Magdalena Rok
- Faculty of Chemistry
- University of Wroclaw
- 50-383 Wroclaw
- Poland
| | - Marcin Moskwa
- Faculty of Chemistry
- University of Wroclaw
- 50-383 Wroclaw
- Poland
| | | | - Wojciech Medycki
- Institute of Molecular Physics
- Polish Academy of Sciences
- 60-179 Poznań
- Poland
| | - Michaela Zamponi
- Forschungszentrum Jülich GmbH
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ)
- 85748 Garching
- Germany
| | - Grażyna Bator
- Faculty of Chemistry
- University of Wroclaw
- 50-383 Wroclaw
- Poland
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Zheng J, Yang H, Xie M, Li D. The π-acidity/basicity of cyclic trinuclear units (CTUs): from a theoretical perspective to potential applications. Chem Commun (Camb) 2019; 55:7134-7146. [PMID: 31134237 DOI: 10.1039/c9cc02969a] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cyclic trinuclear units (CTUs) based on Au(i), Ag(i) and Cu(i) cations, featuring near planar nine-membered coordination rings, represent an important class of metal-organic π-acids/bases with highly adjustable π-acidity/basicity. Their superior π-acidity/basicity coupled with Lewis-acidic and metalmetal bonding sites offers excellent attraction for a wide range of acidic/basic species, and usually followed by noticeable changes of luminescence or charge transfer behaviors. A series of representative cases from the past two decades have been selected herein for such cyclic trinuclear units in both oligomeric and polymeric systems. Their fascinating and profound potential applications related to π-acidity/basicity are highlighted, including molecular absorption and separation, luminescence sensing and detection, organic light-emitting diodes (OLEDs), metal-organic field-effect transistors (MOFETs), molecular wires, and catalysis. The challenges in improving the performance for practical application will also be discussed.
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Affiliation(s)
- Ji Zheng
- College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Hu Yang
- College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Mo Xie
- College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
| | - Dan Li
- College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
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Molčanov K, Milašinović V, Ivić N, Stilinović V, Kolarić D, Kojić-Prodić B. Influence of organic cations on the stacking of semiquinone radical anions. CrystEngComm 2019. [DOI: 10.1039/c9ce00919a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of salts of tetrachloro- and tetrabromosemiquinone radical anions reveal four types of stacks: 1) pancake bonded dimers, 2) pancake-bonded trimers, 3) equidistant radicals and 4) a novel type of equidistant stacks of partially charged radicals.
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Affiliation(s)
| | | | - Nives Ivić
- Ruđer Bošković Institute
- Zagreb HR-10000
- Croatia
| | - Vladimir Stilinović
- Department of Chemistry
- Faculty of Science
- University of Zagreb
- Zagreb HR-10000
- Croatia
| | - Dinko Kolarić
- Special Hospital for Medical Rehabilitation
- Daruvarske Toplice
- Daruvar HR-43500
- Croatia
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