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Chandra S, Suryaprasad B, Ramanathan N, Sundararajan K. Dominance of unique Pπ phosphorus bonding with π donors: evidence using matrix isolation infrared spectroscopy and computational methodology. Phys Chem Chem Phys 2020; 22:20771-20791. [PMID: 32909555 DOI: 10.1039/d0cp02880k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Albeit the first account of hypervalentπ interactions has been reported with halogenπ interactions, the feasibility of their extension to other hypervalent atoms as possible Lewis acids is still open. In this work, the role of phosphorus as an acceptor from the π electron cloud (Pπ pnicogen or phosphorus bonding) in PCl3-C2H2 and PCl3-C2H4 heterodimers is explored, by combining matrix isolation infrared spectroscopy with ab initio and DFT computational methodologies. The respective potential energy surfaces of the PCl3-C2H2 and PCl3-C2H4 heterodimers reveal unique minima stabilized by a concert of reasonably strong to weak interactions, of which Pπ phosphorus bonding was energetically dominant. Heterodimers, trimers and tetramers bound primarily by this unique phosphorus bond were generated at low temperatures. The dominance of phosphorus bonding in the PCl3-C2H2 and PCl3-C2H4 heterodimers over other interactions (such as Hπ, HCl, HP, Clπ and lone pair-π interactions) was confirmed and substantiated using extended quantum theory of atoms in molecules, natural bond orbital, electrostatic potential mapping and energy decomposition analyses. The following inferences in correlation with results from non-covalent-interaction analysis offer a complete understanding of the nature of the Pπ phosphorus bonding interactions. The significance of electrostatic forces kinetically favoring the formation of phosphorus bonded heterodimers, in addition to thermodynamic stabilization, is demonstrated experimentally.
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Affiliation(s)
- Swaroop Chandra
- Homi Bhabha National Institute, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Center for Atomic Research, Kalpakkam - 603102, Tamil Nadu, India.
| | - B Suryaprasad
- Homi Bhabha National Institute, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Center for Atomic Research, Kalpakkam - 603102, Tamil Nadu, India.
| | - N Ramanathan
- Homi Bhabha National Institute, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Center for Atomic Research, Kalpakkam - 603102, Tamil Nadu, India.
| | - K Sundararajan
- Homi Bhabha National Institute, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Center for Atomic Research, Kalpakkam - 603102, Tamil Nadu, India.
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2
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Del Bene JE, Alkorta I, Elguero J. Complexes H 2 CO:PXH 2 and HCO 2 H : PXH 2 for X=NC, F, Cl, CN, OH, CCH, CH 3 , and H: Pnicogen Bonds and Hydrogen Bonds. Chemphyschem 2020; 21:741-748. [PMID: 32069382 DOI: 10.1002/cphc.202000099] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 02/18/2020] [Indexed: 11/09/2022]
Abstract
Ab initio MP2/aug'-cc-pVTZ calculations have been carried out to investigate H2 CO : PXH2 pnicogen-bonded complexes and HCO2 H : PXH2 complexes that are stabilized by pnicogen bonds and hydrogen bonds, with X=NC, F, Cl, CN, OH, CCH, CH3 , and H. The binding energies of these complexes exhibit a second-order dependence on the O-P distance. DFT-SAPT binding energies correlate linearly with MP2 binding energies. The HCO2 H : PXH2 complexes are stabilized by both a pnicogen bond and a hydrogen bond, resulting in greater binding energies for the HCO2 H : PXH2 complexes compared to H2 CO : PXH2 . Neither the O-P distance across the pnicogen bond nor the O-P distance across the hydrogen bond correlates with the binding energies of these complexes. The nonlinearity of the hydrogen bonds suggests that they are relatively weak bonds, except for complexes in which the substituent X is either CH3 or H. The pnicogen bond is the more important stabilizing interaction in the HCO2 H : PXH2 complexes except when the substituent X is a more electropositive group. EOM-CCSD spin-spin coupling constants 1p J(O-P) across pnicogen bonds in H2 CO:PXH2 and HCO2 H : PXH2 complexes increase as the O-P distance decreases, and exhibit a second order dependence on that distance. There is no correlation between 2h J(O-P) and the O-P distance across the hydrogen bond in the HCO2 H : PXH2 complexes. 2h J(O-P) coupling constants for complexes with X=CH3 and H have much greater absolute values than anticipated from their O-P distances.
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Affiliation(s)
- Janet E Del Bene
- Department of Chemistry, Youngstown State University, Youngstown, Ohio, 44555, USA
| | - Ibon Alkorta
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva, 3, 28006, Madrid, Spain
| | - José Elguero
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva, 3, 28006, Madrid, Spain
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3
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Ghafari Nikoo Jooneghani S, Gholipour A. Mutual cooperation of π-π stacking and pnicogen bond interactions of substituted monomeric Lawesson’s reagent and pyridine rings: Theoretical insight into Pyr||X-PhPS2⊥pyr complexes. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.02.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Sruthi PK, Sarkar S, Ramanathan N, Sundararajan K. Elusive hypervalent phosphorus⋯π interactions: evidence for paradigm transformation from hydrogen to phosphorus bonding at low temperatures. Phys Chem Chem Phys 2019; 21:12250-12264. [DOI: 10.1039/c9cp01925a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A paradigm transformation from hydrogen to phosphorus bonding is found to depend on the proton affinity of the interacting π-systems.
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Affiliation(s)
- P. K. Sruthi
- Materials Chemistry and Metal Fuel Cycle Group
- Homi Bhabha National Institute
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603 102
- India
| | - Shubhra Sarkar
- Materials Chemistry and Metal Fuel Cycle Group
- Homi Bhabha National Institute
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603 102
- India
| | - N. Ramanathan
- Materials Chemistry and Metal Fuel Cycle Group
- Homi Bhabha National Institute
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603 102
- India
| | - K. Sundararajan
- Materials Chemistry and Metal Fuel Cycle Group
- Homi Bhabha National Institute
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603 102
- India
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5
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Liu W, Chang C, Hu H, Yang H. Interleukin-23: A New Atherosclerosis Target. J Interferon Cytokine Res 2018; 38:440-444. [PMID: 30328797 DOI: 10.1089/jir.2018.0006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Wenjing Liu
- Department of Cardiology, Handan First Hospital, Handan, Hebei, China
| | - Chao Chang
- Department of Cardiology, Handan First Hospital, Handan, Hebei, China
| | - Haiying Hu
- Department of Cardiology, Handan First Hospital, Handan, Hebei, China
| | - Hua Yang
- Department of Cardiology, Handan First Hospital, Handan, Hebei, China
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Ye J, Wang Y, Wang Z, Ji Q, Huang Y, Zeng T, Hu H, Ye D, Wan J, Lin Y. Circulating Th1, Th2, Th9, Th17, Th22, and Treg Levels in Aortic Dissection Patients. Mediators Inflamm 2018; 2018:5697149. [PMID: 30258282 PMCID: PMC6146596 DOI: 10.1155/2018/5697149] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 06/21/2018] [Accepted: 07/26/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Previous studies demonstrated that the subsets of CD4+ T helper (Th) cells are closely related to vascular diseases, including atherosclerosis and hypertension. This study is aimed at investigating the circulating Th1, Th2, Th9, Th17, Th22, and Treg levels in aortic dissection (AD) patients. METHODS Blood samples from AD (n = 56) and non-AD (NAD, n = 24) patients were collected, and the circulating levels of Th1, Th2, Th9, Th17, Th22, and Treg cells and their transcription factors and functional cytokines were measured by flow cytometric analysis, quantitative polymerase chain reaction, and enzyme-linked immunosorbent assays, respectively. In addition, the human aortic vascular smooth muscle cells (HASMCs) were treated with saline, angiotensin II (Ang II), or plasma from AD patients. RESULTS Compared with the levels in the NAD group, the Th1, Th9, Th17, Th22, and their transcription factor levels were increased and the Th2, Treg, and their transcription factor levels exhibited a decreasing trend in AD patients. In addition, higher IFN-γ, IL-9, IL-17, and IL-22 levels and lower IL-4 and IL-35 levels were observed in AD patients. Simple linear regression analysis and binary logistic regression analysis suggested that Th1/IFN-γ, IL-9, Th17/IL-17, and Th22/IL-22 positively regulated the occurrence of AD, while Th2/IL-4 and Treg/IL-35 negatively regulated the occurrence of AD. Plasma from AD patients further increased Bax mRNA levels but decreased Bcl2 and α-SMA mRNA levels in Ang II-treated HASMCs. CONCLUSIONS Changes in Th1, Th2, Th9, Th17, Th22, and Treg activity are associated with the onset of AD. Different subsets of CD4+ T cells play different roles in the presence of AD.
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Affiliation(s)
- Jing Ye
- Department of Cardiology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Cardiology, Hubei Key Laboratory of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China
- Emergency & Critical Care Center, Beijing Institute of Heart, Lung, and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Yuan Wang
- Department of Cardiology, Hubei Key Laboratory of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China
| | - Zhen Wang
- Department of Cardiology, Hubei Key Laboratory of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China
- Emergency & Critical Care Center, Beijing Institute of Heart, Lung, and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Qingwei Ji
- Department of Cardiology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Emergency & Critical Care Center, Beijing Institute of Heart, Lung, and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Ying Huang
- Department of Cardiology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Ultrasound, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - Tao Zeng
- Department of Cardiology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Haiying Hu
- Department of Cardiology, Handan First Hospital, Handan 056002, China
| | - Di Ye
- Department of Cardiology, Hubei Key Laboratory of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China
| | - Jun Wan
- Department of Cardiology, Hubei Key Laboratory of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China
| | - Yingzhong Lin
- Department of Cardiology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Cardiology, Hubei Key Laboratory of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China
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Protein Arginine Methyltransferase 2 Inhibits Angiotensin II-Induced Proliferation and Inflammation in Vascular Smooth Muscle Cells. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1547452. [PMID: 30186848 PMCID: PMC6110007 DOI: 10.1155/2018/1547452] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/30/2018] [Indexed: 11/20/2022]
Abstract
Objectives Protein arginine methyltransferase 2 (PRMT2) protects against vascular injury-induced intimal hyperplasia; however, little is known about the role of PRMT2 in angiotensin II (Ang II)-induced VSMCs proliferation and inflammation. This research aims to determine whether PRMT2 inhibits Ang II-induced proliferation and inflammation of vascular smooth muscle cells (VSMCs). Materials and Methods PRMT2 overexpression was used to elucidate the role of PRMT2 in Ang II-induced VSMCs proliferation and inflammation. Western blotting and reverse transcriptional PCR were adopted to detect protein and mRNA expression severally. Cell viability was evaluated by 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) assay and cell cycle distribution by flow cytometry. Results Ang II significantly reduced mRNA and protein levels of PRMT2 in VSMCs in time-dependent and dose-dependent manner. Results of PRMT2 overexpression indicated that PRMT2 inhibited proliferation of VSMCs stimulated with 100 nmol/L Ang II for 24 hours. Furthermore, overexpression of PRMT2 reduced Ang II-induced production of proinflammatory cytokines such as interleukin 6 (IL-6) and interleukin 1β (IL-1β) in VSMCs. Conclusions These findings suggest that PRMT2 alleviates Ang II-induced VSMCs proliferation and inflammation, providing a new mechanism about how Ang II mediated VSMCs proliferation and inflammation.
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Grabowski SJ. Tetrel Bonds with π-Electrons Acting as Lewis Bases-Theoretical Results and Experimental Evidences. Molecules 2018; 23:molecules23051183. [PMID: 29762534 PMCID: PMC6100247 DOI: 10.3390/molecules23051183] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/11/2018] [Accepted: 05/11/2018] [Indexed: 11/16/2022] Open
Abstract
MP2/aug-cc-pVTZ calculations were carried out for the ZFH₃-B complexes (Z = C, Si, Ge, Sn and Pb; B = C₂H₂, C₂H₄, C₆H₆ and C₅H₅⁻; relativistic effects were taken into account for Ge, Sn and Pb elements). These calculations are supported by other approaches; the decomposition of the energy of interaction, Quantum Theory of Atoms in Molecules (QTAIM) and Natural Bond Orbital (NBO) method. The results show that tetrel bonds with π-electrons as Lewis bases are classified as Z···C links between single centers (C is an atom of the π-electron system) or as Z···π interactions where F‒Z bond is directed to the mid-point (or nearly so) of the CC bond of the Lewis base. The analogous systems with Z···C/π interactions were found in the Cambridge Structural Database (CSD). It was found that the strength of interaction increases with the increase of the atomic number of the tetrel element and that for heavier tetrel elements the ZFH₃ tetrahedral structure is more deformed towards the structure with the planar ZH₃ fragment. The results of calculations show that the tetrel bond is sometimes accompanied by the Z-H···C hydrogen bond or even sometimes the ZFH₃-B complexes are linked only by the hydrogen bond interaction.
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Affiliation(s)
- Sławomir J Grabowski
- Faculty of Chemistry, University of the Basque Country and Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Spain.
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain.
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9
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Mutual interplay between pnicogen–π and tetrel bond in PF3⊥X–Pyr…SiH3CN complexes: NMR, SAPT, AIM, NBO, and MEP analysis. Struct Chem 2018. [DOI: 10.1007/s11224-018-1106-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Zierkiewicz W, Michalczyk M, Scheiner S. Implications of monomer deformation for tetrel and pnicogen bonds. Phys Chem Chem Phys 2018. [DOI: 10.1039/c8cp00430g] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Monomer rearrangement raises the interaction energy by up to 20 kcal mol−1and intensifies its σ-hole by a factor of 1.5–2.9.
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Affiliation(s)
- Wiktor Zierkiewicz
- Faculty of Chemistry
- Wrocław University of Science and Technology
- 50-370 Wrocław
- Poland
| | - Mariusz Michalczyk
- Faculty of Chemistry
- Wrocław University of Science and Technology
- 50-370 Wrocław
- Poland
| | - Steve Scheiner
- Department of Chemistry and Biochemistry
- Utah State University
- Logan
- USA
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11
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McDowell SAC. The effect of anions on noncovalent interactions in model clusters of chalcogen-containing (CH3)2X (X = O, S, Se) molecules. Phys Chem Chem Phys 2018; 20:18420-18428. [DOI: 10.1039/c8cp03641a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A computational study of F−⋯(CH3)2O⋯CH3F with F− bound to the protons of the two methyl groups, found significant enhancement of the O⋯C interaction relative to the neutral (CH3)2O⋯CH3F dyad.
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Affiliation(s)
- Sean A. C. McDowell
- Department of Biological and Chemical Sciences
- The University of the West Indies
- Barbados
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12
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New Type of Halogen Bond: Multivalent Halogen Interacting with π- and σ-Electrons. Molecules 2017; 22:molecules22122150. [PMID: 29206144 PMCID: PMC6149982 DOI: 10.3390/molecules22122150] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 11/29/2017] [Accepted: 12/01/2017] [Indexed: 12/05/2022] Open
Abstract
MP2/aug-cc-pVTZ calculations were performed for complexes of BrF3 and BrF5 acting as Lewis acids through the bromine centre, with species playing a role of Lewis base: dihydrogen, acetylene, ethylene, and benzene. The molecular hydrogen donates electrons by its σ-bond, while in remaining moieties—in complexes of hydrocarbons; such an electron transfer follows from π-electrons. The complexes are linked by a kind of the halogen bond that is analyzed for the first time in this study, i.e., it is the link between the multivalent halogen and π or σ-electrons. The nature of such a halogen bond is discussed, as well as various dependencies and correlations are presented. Different approaches are applied here, the Quantum Theory of Atoms in Molecules, Natural Bond Orbital method, the decomposition of the energy of interaction, the analysis of electrostatic potentials, etc.
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Pnictogen bonding in pyrazine•PnX5 (Pn = P, As, Sb and X = F, Cl, Br) complexes. J Mol Model 2017; 23:328. [DOI: 10.1007/s00894-017-3502-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 10/10/2017] [Indexed: 01/28/2023]
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Grabowski SJ, Sokalski WA. Are Various σ-Hole Bonds Steered by the Same Mechanisms? Chemphyschem 2017; 18:1569-1577. [DOI: 10.1002/cphc.201700224] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Sławomir J. Grabowski
- Faculty of Chemistry; University of the Basque Country and Donostia, International Physics Center (DIPC); P.K. 1072 20080 Donostia Spain
- IKERBASQUE, Basque Foundation for Science; 48011 Bilbao Spain
| | - W. Andrzej Sokalski
- Department of Chemistry K1/W1; Wrocław University of Science and Technology; Wyb. Wyspiańskiego 27 50-370 Wrocław Poland
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Esrafili MD, Sadr-Mousavi A. Modulating of the pnicogen-bonding by a H⋯π interaction: An ab initio study. J Mol Graph Model 2017; 75:165-173. [PMID: 28595167 DOI: 10.1016/j.jmgm.2017.04.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 04/14/2017] [Accepted: 04/18/2017] [Indexed: 11/29/2022]
Abstract
An ab initio study of the cooperativity in XH2P⋯NCH⋯Z and XH2P⋯CNH⋯Z complexes (X=F, Cl, Br, CN, NC; Z=C2H2,C6H6) connected by pnicogen-bonding and H⋯π interactions is carried out by means of MP2 computational method. A detailed analysis of the structures, interaction energies and bonding properties is performed on these systems. For each set of the complexes considered, a favorable cooperativity is observed, especially in X=F and CN complexes. However, for a given X or Z, the amount of cooperativity effects in XH2P⋯CNH⋯Z complexes are more important than XH2P⋯NCH⋯Z counterparts. Besides, the influence of a H⋯π interaction on a P⋯N (C) bond is more pronounced than that of a P⋯N (C) bond on a H⋯π bond. The quantum theory of atoms in molecules shows that ternary complexes have increased electron densities at their bond critical points relative to the corresponding binary systems. The results also indicate that the strength of the P⋯N(C) and H⋯π interactions increases in the presence of the solvent.
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Affiliation(s)
- Mehdi D Esrafili
- Laboratory of Theoretical Chemistry, Department of Chemistry, University of Maragheh, P.O. Box: 5513864596, Maragheh, Iran.
| | - Asma Sadr-Mousavi
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
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Wang Y, Li X, Zeng Y, Meng L, Zhang X. Theoretical insights into the π-hole interactions in the complexes containing triphosphorus hydride (P 3H 3) and its derivatives. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2017; 73:195-202. [PMID: 28362282 DOI: 10.1107/s2052520616019223] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 12/02/2016] [Indexed: 06/07/2023]
Abstract
The π-hole of triphosphorus hydride (P3H3) and its derivatives Z3X3 (Z = P, As; X = H, F, Cl, Br) was discovered and analyzed. MP2/aug-cc-pVDZ calculations were performed on the π-hole interactions in the HCN...Z3X3 complexes and the mutual influence between π-hole interactions and the hydrogen bond in the HCN...HCN...Z3X3 and HCN...Z3X3...HCN complexes studied. The π-hole interaction belongs to the typical closed-shell noncovalent interaction. The linear relationship was found between the most positive electrostatic potential of the π-hole (VS,max) and the interaction energy. Moreover, the VS,max of the π-hole was also found to be linearly correlated to the electrostatic energy term, indicating the important contribution of the electrostatic energy term to the π-hole interaction. There is positive cooperativity between the π-hole interaction and the hydrogen bond in the termolecular complexes. The π-hole interaction has a greater influence on the hydrogen bond than vice versa. The mutual enhancing effect between the π-hole interaction and the hydrogen bond in the HCN...HCN...Z3X3 complexes is greater than that in the HCN...Z3X3...HCN complexes.
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Affiliation(s)
- Yuehong Wang
- College of Chemistry and Material Sciences, Key Laboratory of Inorganic Nano-materials of Hebei Province, Hebei Normal University, Shijiazhuang, Hebei 050024, People's Republic of China
| | - Xiaoyan Li
- College of Chemistry and Material Sciences, Key Laboratory of Inorganic Nano-materials of Hebei Province, Hebei Normal University, Shijiazhuang, Hebei 050024, People's Republic of China
| | - Yanli Zeng
- College of Chemistry and Material Sciences, Key Laboratory of Inorganic Nano-materials of Hebei Province, Hebei Normal University, Shijiazhuang, Hebei 050024, People's Republic of China
| | - Lingpeng Meng
- College of Chemistry and Material Sciences, Key Laboratory of Inorganic Nano-materials of Hebei Province, Hebei Normal University, Shijiazhuang, Hebei 050024, People's Republic of China
| | - Xueying Zhang
- College of Chemistry and Material Sciences, Key Laboratory of Inorganic Nano-materials of Hebei Province, Hebei Normal University, Shijiazhuang, Hebei 050024, People's Republic of China
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Mohajeri A, Eskandari K, Amin Safaee S. Endohedral pnicogen and triel bonds in doped C60 fullerenes. NEW J CHEM 2017. [DOI: 10.1039/c7nj01477e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Encapsulation of HnYF3−n in C30X15Y15 (X = B, Al and Y = N, P and n = 1, 2) and characterization of the endohedral pnicogen and triel bonds.
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Affiliation(s)
- Afshan Mohajeri
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
| | - K. Eskandari
- Department of Chemistry
- Isfahan University of Technology
- Isfahan
- Iran
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18
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Zhou Y, Wu Y, Ma W, Jiang X, Takemra A, Uemura M, Xia L, Lin K, Xu Y. The effect of quercetin delivery system on osteogenesis and angiogenesis under osteoporotic conditions. J Mater Chem B 2017; 5:612-625. [DOI: 10.1039/c6tb02312f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Bone regeneration under osteoporotic conditions with impaired angiogenesis, osteogenesis and remodeling represents a great challenge.
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Affiliation(s)
- Yuning Zhou
- Department of Oral Surgery
- Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Key Laboratory of Stomatology
- Shanghai
| | - Yuqiong Wu
- Department of Prosthodontics
- Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai
- China
| | - Wudi Ma
- Department of Oral Surgery
- Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Key Laboratory of Stomatology
- Shanghai
| | - Xinquan Jiang
- Department of Prosthodontics
- Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai
- China
| | | | - Mamoru Uemura
- Department of Anatomy
- Osaka Dental University
- Osaka
- Japan
| | - Lunguo Xia
- Center of Craniofacial Orthodontics
- Department of Oral and Cranio-maxillofacial Science
- Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai
| | - Kaili Lin
- School & Hospital of Stomatology
- Tongji University
- Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Shanghai, 200072
- China
| | - Yuanjin Xu
- Department of Oral Surgery
- Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Key Laboratory of Stomatology
- Shanghai
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19
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The mutual influence between π-hole pnicogen bonds and σ-hole halogen bonds in complexes of PO2Cl and XCN/C6H6 (X = F, Cl, Br). Struct Chem 2016. [DOI: 10.1007/s11224-016-0762-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ramanathan N, Sankaran K, Sundararajan K. PCl3–C6H6 heterodimers: evidence for P⋯π phosphorus bonding at low temperatures. Phys Chem Chem Phys 2016; 18:19350-8. [DOI: 10.1039/c6cp03825e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A phosphorous trichloride (PCl3)–benzene (C6H6) heterodimer was generated in a low temperature N2 matrix and was characterized using infrared spectroscopy.
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Affiliation(s)
- N. Ramanathan
- Chemistry Group
- Indira Gandhi Center for Atomic Research
- Kalpakkam – 603102
- India
| | - K. Sankaran
- Chemistry Group
- Indira Gandhi Center for Atomic Research
- Kalpakkam – 603102
- India
| | - K. Sundararajan
- Chemistry Group
- Indira Gandhi Center for Atomic Research
- Kalpakkam – 603102
- India
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Shuai B, Shen L, Zhu R, Zhou P. Effect of Qing'e formula on the in vitro differentiation of bone marrow-derived mesenchymal stem cells from proximal femurs of postmenopausal osteoporotic mice. Altern Ther Health Med 2015. [PMID: 26205885 PMCID: PMC4513391 DOI: 10.1186/s12906-015-0777-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Qing'e formula (QEF), prepared from an ancient Chinese recipe, was previously suggested to regulate bone metabolism and improve bone mineral density in patients with osteoporosis. To study the effects of medicated serum containing QEF on the in vitro differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) isolated from the proximal femurs of postmenopausal osteoporosis (PMOP) mice. METHODS Using an established mouse model of PMOP, mononuclear cells were isolated from the bone marrow present in the proximal femurs and cultured. PMOP mice were also randomly divided into four groups: the untreated group (Group A) and the groups treated with respectively low (Group B), medium (Group C), and high (Group D) concentrations of QEF. Serum was isolated from each and used to treat the cultured BMSCs in conjunction with recombinant human bone morphogenetic protein-2 (rhBMP-2). Cell morphology, proliferation rates, intracellular alkaline phosphatase (ALP) activity, and transforming growth factor-beta 1 (TGF-β1) mRNA expression were evaluated. RESULTS QEF-treated serum, particularly that containing moderate and high concentrations, appears to enhance the rhBMP-2-mediated changes in cell morphology, proliferation, and differentiation (determined via the expression of TGF-β1 mRNA and ALP activity) observed in the BMSCs isolated from PMOP mice. CONCLUSIONS QEF may play a role in the prevention and treatment of PMOP by enhancing the activity of rhBMP-2.
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