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Tong L, Zhang D, Huang Z, Gao F, Zhang S, Chen F, Liu C. Calcium Ion-Coupled Polyphosphates with Different Degrees of Polymerization for Bleeding Control. ACS APPLIED MATERIALS & INTERFACES 2024; 16:43244-43256. [PMID: 39136271 DOI: 10.1021/acsami.4c06698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
The development of efficient hemostatic materials is crucial for achieving rapid hemorrhage control and effective wound healing. Inorganic polyphosphate (polyP) is recognized as an effective modulator of the blood coagulation process. However, the specific effect of polyP chain length on coagulation is not yet fully understood. Furthermore, calcium ions (Ca2+) are essential for the coagulation process, promoting multiple enzyme-catalyzed reactions within the coagulation cascade. Hence, calcium ion-coupled polyphosphate powders with three different degrees of polymerization (CaPP-n, n = 20, 50, and 1500) are synthesized by an ion-exchange reaction. CaPP exhibits a crystalline phase at a low polymerization degree and transitions to an amorphous phase as the polymerization degree increases. Notably, the addition of Ca2+ enhances the wettability of polyP, and CaPP promotes hemostasis, with varying degrees of effectiveness related to chain length. CaPP-50 exhibits the most promising hemostatic performance, with the lowest blood clotting index (BCI, 12.1 ± 0.7%) and the shortest clotting time (302.0 ± 10.5 s). By combining Ca2+ with polyP of medium-chain length, CaPP-50 demonstrates an enhanced ability to accelerate the adhesion and activation of blood cells, initiate the intrinsic coagulation cascade, and form a stable blood clot, outperforming both CaPP-20 and CaPP-1500. The hemostatic efficacy of CaPP-50 is further validated using rat liver bleeding and femoral artery puncture models. CaPP-50 is proven to possess hemostatic properties comparable to those of commercial calcium-based zeolite hemostatic powder and superior to kaolin. In addition, CaPP-50 exhibits excellent biocompatibility and long-term storage stability. These results suggest that CaPP-50 has significant clinical and commercial potential as an active inorganic hemostatic agent for rapid control of bleeding.
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Affiliation(s)
- Laiqiang Tong
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Dong Zhang
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Zhenhua Huang
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Fan Gao
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Shaozan Zhang
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Fangping Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Changsheng Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, P. R. China
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Royla P, Schwedtmann K, Han Z, Fidelius J, Gates DP, Gomila RM, Frontera A, Weigand JJ. Cationic Phosphinidene as a Versatile P 1 Building Block: [L C-P] + Transfer from Phosphonio-Phosphanides [L C-P-PR 3] + and Subsequent L C Replacement Reactions (L C = N-Heterocyclic Carbene). J Am Chem Soc 2023; 145:10364-10375. [PMID: 37105536 PMCID: PMC10177976 DOI: 10.1021/jacs.3c02256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Indexed: 04/29/2023]
Abstract
Cationic imidazoliumyl(phosphonio)-phosphanides [LC-P-PR3]+ (1a-e+, LC = 4,5-dimethyl-1,3-diisopropylimidazolium-2-yl; R = alkyl, aryl) are obtained via the nucleophilic fragmentation of tetracationic tetraphosphetane [(LC-P)4][OTf]4 (2[OTf]4) with tertiary phosphanes. They act as [LC-P]+ transfer reagents in phospha-Wittig-type reactions, when converted with various thiocarbonyls, giving unprecedented cationic phosphaalkenes [LC-P═CR2]+ (5a-f[OTf]) or phosphanides [LC-P-CR(NR2')]+ (6a-d[OTf]). Theoretical calculations suggest that three-membered cyclic thiophosphiranes are crucial intermediates of this reaction. To test this hypothesis, treatment of [LC-P-PPh3]+ with phosphaalkenes, that are isolobal to thioketones, permits the isolation of diphosphirane salts 11a,b[OTf]. Furthermore, preliminary studies suggest that the cationic phosphaalkene [LC-P═CPh2]+ may be employed to access rare examples of η2-P═C π-complexes with Pd0 and Pt0 when treated with [Pd(PPh3)4] and [Pt(PPh3)3] for which analogous complexes of neutral phosphaalkenes are scarce. The versatility of [LC-P]+ as a valuable P1 building block was showcased in substitution reactions of the transferred LC-substituent using nucleophiles. This is demonstrated through the reactions of 5a[OTf] and 6c[OTf] with Grignard reagents and KNPh2, providing a convenient, high-yielding access to MesP═CPh2 (16) and otherwise difficult-to-synthesize 1,3-diphosphetane 17 and P-aminophosphaalkenes.
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Affiliation(s)
- Philipp Royla
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
| | - Kai Schwedtmann
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
| | - Zeyu Han
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, V6T 1Z1 Vancouver, Canada
| | - Jannis Fidelius
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
| | - Derek P. Gates
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, V6T 1Z1 Vancouver, Canada
| | - Rosa M. Gomila
- Department
of Chemistry, Universitat de Illes Balears, 07122 Palma de
Mallorca, Spain
| | - Antonio Frontera
- Department
of Chemistry, Universitat de Illes Balears, 07122 Palma de
Mallorca, Spain
| | - Jan J. Weigand
- Chair
of Inorganic Molecular Chemistry, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069 Dresden, Germany
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Hersh WH, Chan TY. Improving the accuracy of 31P NMR chemical shift calculations by use of scaling methods. Beilstein J Org Chem 2023; 19:36-56. [PMID: 36726479 PMCID: PMC9843238 DOI: 10.3762/bjoc.19.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/14/2022] [Indexed: 01/12/2023] Open
Abstract
Calculation of 31P NMR chemical shifts for a series of tri- and tetracoordinate phosphorus compounds using several basis sets and density functional theory (DFT) functionals gave a modest fit to experimental chemical shifts, but an excellent linear fit when plotted against the experimental values. The resultant scaling methods were then applied to a variety of "large" compounds previously selected by Latypov et al. and a set of stereoisomeric and unusual compounds selected here. No one method was best for all structural types. For compounds that contain P-P bonds and P-C multiple bonds, the Latypov et al. method using the PBE0 functional was best (mean absolute deviation/root mean square deviation (MAD/RMSD) = 6.9/8.5 ppm and 6.6/8.2 ppm, respectively), but for the full set of compounds gave higher deviations (MAD/RMSD = 8.2/12.3 ppm), and failed by over 60 ppm for a three-membered phosphorus heterocycle. Use of the M06-2X functional for both the structural optimization and NMR chemical shift calculation was best overall for the compounds without P-C multiple bonds (MAD/RMSD = 5.4/7.1 ppm), but failed by 30-49 ppm for compounds having any P-C multiple-bond character. Failures of these magnitudes have not been reported previously for these widely used functionals. These failures were then used to screen a variety of recommended functionals, leading to better overall methods for calculation of these chemical shifts: optimization with the M06-2X functional and NMR calculation with the PBE0 or ωB97x-D functionals gave values for MAD/RMSD = 6.9/8.5 ppm and 6.8/9.1 ppm, respectively, over an experimental chemical shift range of -181 to 356 ppm. Due to the unexplained failures observed, we recommend use of more than one method when looking at novel structures.
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Affiliation(s)
- William H Hersh
- Department of Chemistry and Biochemistry, Queens College, Queens, NY 11367-1597, USA,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA
| | - Tsz-Yeung Chan
- Department of Chemistry and Biochemistry, Queens College, Queens, NY 11367-1597, USA,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA
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4
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Jessen HJ, Dürr-Mayer T, Haas TM, Ripp A, Cummins CC. Lost in Condensation: Poly-, Cyclo-, and Ultraphosphates. Acc Chem Res 2021; 54:4036-4050. [PMID: 34648267 DOI: 10.1021/acs.accounts.1c00370] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Much like linear, branched, and cyclic alkanes, condensed phosphates exist as linear, branched, and cyclic structures. Inasmuch as alkanes are the cornerstone of organic chemistry, generating an inexplorably large chemical space, a comparable richness in structures can be expected for condensed phosphates, as also for them the concepts of isomerism apply. Little of their chemical space has been charted, and only a few different synthesis methods are available to construct isomers of condensed phosphates. Here, we will discuss the application of phosphoramidites with one, two, or three P-N bonds that can be substituted selectively to access different condensed phosphates in a highly controllable manner. Work directed toward the further exploration of this chemical space will contribute to our understanding of the fundamental chemistry of phosphates.In biology, condensed phosphates play important roles in the form of inorganic representatives, such as pyrophosphate, polyphosphate, and cyclophosphate, and also in conjugation with organic molecules, such as esters and amidates. Phosphorus is one of the six biogenic elements; the omnipresence of phosphates in biology points toward their critical involvement in prebiotic chemistry and the emergence of life itself. Indeed, it is hard to imagine any life without phosphate. It is therefore desirable to achieve through synthesis a better understanding of the chemistry of the condensed phosphates to further explore their biology.There is a rich but underexplored chemistry of the family of condensed phosphates per se, which is further diversified by their conjugation to important biomolecules and metabolites. For example, proteins may be polyphosphorylated on lysins, a very recent addition to posttranslational modifications. Adenosine triphosphate, as a representative of the small molecules, on the other hand, is well known as the universal cellular energy currency. In this Account, we will describe our motivations and our approaches to construct, modify, and synthetically apply different representatives of the condensed phosphates. We also describe the generation of hybrids composed of cyclic and linear structures of different oxidation states and develop them into reagents of great utility. A pertinent example is provided in the step-economic synthesis of the magic spot nucleotides (p)ppGpp. Finally, we provide an overview of 31P NMR data collected over the years in our laboratories, helping as a waymarker for not getting lost in condensation.
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Affiliation(s)
- Henning J. Jessen
- Department of Chemistry and Pharmacy, Institute of Organic Chemistry, University of Freiburg, Albertstrasse 21, 79104 Freiburg, Germany
- Cluster of Excellence livMatS @ FIT − Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Tobias Dürr-Mayer
- Department of Chemistry and Pharmacy, Institute of Organic Chemistry, University of Freiburg, Albertstrasse 21, 79104 Freiburg, Germany
| | - Thomas M. Haas
- Department of Chemistry and Pharmacy, Institute of Organic Chemistry, University of Freiburg, Albertstrasse 21, 79104 Freiburg, Germany
| | - Alexander Ripp
- Department of Chemistry and Pharmacy, Institute of Organic Chemistry, University of Freiburg, Albertstrasse 21, 79104 Freiburg, Germany
- Cluster of Excellence livMatS @ FIT − Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Christopher C. Cummins
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge Massachusetts 02139, United States
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5
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Bohlen JL, Kulendran B, Rothfuss H, Barner-Kowollik C, Roesky PW. Heterobimetallic Au( i)/Y( iii) single chain nanoparticles as recyclable homogenous catalysts. Polym Chem 2021. [DOI: 10.1039/d1py00552a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Au(i)/Y(iii) single chain nanoparticles (SCNPs) are potent homogenous, recyclable catalysts for the hydroamination. The SCNPs consist of terpolymer chains with orthogonal ligand units, enabling the selective embedding of different metals.
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Affiliation(s)
- Josina L. Bohlen
- Institute for Inorganic Chemistry
- Karlsruhe Institute of Technology (KIT)
- Germany
| | - Bragavie Kulendran
- Institute for Inorganic Chemistry
- Karlsruhe Institute of Technology (KIT)
- Germany
| | - Hannah Rothfuss
- Institute of Nanotechnology (INT)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Christopher Barner-Kowollik
- Institute of Nanotechnology (INT)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
- Centre for Materials Science
| | - Peter W. Roesky
- Institute for Inorganic Chemistry
- Karlsruhe Institute of Technology (KIT)
- Germany
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6
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Hägele G. Protolysis and Complex Formation of Organophosphorus Compounds-Characterization by NMR-Controlled Titrations. Molecules 2019; 24:E3238. [PMID: 31492010 PMCID: PMC6766815 DOI: 10.3390/molecules24183238] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/26/2019] [Accepted: 09/02/2019] [Indexed: 11/16/2022] Open
Abstract
Phosphonic acids, aminophosphonic acids, and phosphonocarboxylic acids are characterized by an advanced hyphenated technique, combining potentiometric titration with NMR spectroscopy. Automated measurements involving 13C, 19F and 31P nuclei lead to "pseudo 2D NMR" spectra, where chemical shifts or coupling constants are correlated with analytical parameters. Dissociation constants, stability constants, dynamic and specific chemical shifts are determined. Macroscopic and microscopic dissociation equilibria are discussed.
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Affiliation(s)
- Gerhard Hägele
- Institute of Inorganic Chemistry and Structural Chemistry, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany.
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7
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Kornilov KN. Amides of phosphorus-organic acids: General precursors for the synthesis of phosphorus-arene crown esters. PHOSPHORUS SULFUR 2018. [DOI: 10.1080/10426507.2018.1452237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- K. N. Kornilov
- Moscow State University of Food Production, Moscow, Russian Federation
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8
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Tsivgoulis GM, Kordopati GG, Vachliotis DG, Ioannou PV. The Reaction of Diethylthiophosphinyl Iodide, Et 2P(S)I, with Nucleophiles. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Wang Y, Zuo S, Yang J, Yoon SH. Evolution of Phosphorus-Containing Groups on Activated Carbons during Heat Treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3112-3122. [PMID: 28271892 DOI: 10.1021/acs.langmuir.7b00095] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Two types of activated carbons have been prepared by H3PO4 activation of lignocellulose and by H3PO4 modification of activated carbon, and then heat-treated at temperatures from 400 to 900 °C in an atmosphere of N2 or H2 to investigate the evolution of phosphorus-containing groups. Elemental analysis, X-ray photoelectron spectroscopy, 31P nuclear magnetic resonance, nitrogen adsorption, and scanning electron microscopy have been used to analyze the physicochemical properties of the activated carbons. The results show that C-O-P linkages of phosphorus-containing groups can progressively evolve into C-P-O, C3-P═O, C3-P, and eventually elemental phosphorus as a result of heat treatment. Phosphate-like groups are much more thermally stable in an N2 than in an H2 atmosphere. In N2, C-O-P linkages significantly evolve into C-P-O and C3-P═O at up to 800 °C, whereas C3-P linkages are not formed even at 900 °C. In H2, the corresponding evolution remarkably occurs at 500 °C, forming C3-P linkages and eventually elemental phosphorus. Moreover, the two activated carbons exhibit different evolution trends, suggesting that the evolution happens more easily for phosphorus-containing groups located on the edges of graphite-like crystallites than those in the lattice. Finally, we propose different evolution pathways of phosphorus-containing groups upon heat treatment in N2 and H2 atmospheres.
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Affiliation(s)
- Yongfang Wang
- College of Chemical Engineering, Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University , Nanjing 210037, China
| | - Songlin Zuo
- College of Chemical Engineering, Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University , Nanjing 210037, China
| | - Jianxiao Yang
- College of Materials Science and Engineering, Hunan University , Changsha 410082, China
| | - Seong-Ho Yoon
- Institute for Materials Chemistry and Engineering Sciences, Kyushu University , Fukuoka 8168580, Japan
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10
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Synthesis, properties, and some rhodium, iridium, and platinum complexes of a series of bulky m-terphenylphosphine ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.04.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Momeni A, Filiaggi MJ. Degradation and hemostatic properties of polyphosphate coacervates. Acta Biomater 2016; 41:328-41. [PMID: 27265150 DOI: 10.1016/j.actbio.2016.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 05/06/2016] [Accepted: 06/01/2016] [Indexed: 12/28/2022]
Abstract
UNLABELLED Sodium polyphosphate is a linear polymer formed from phosphate units linked together by sharing oxygen atoms. Addition of calcium to a solution of sodium polyphosphate results in phase separation and formation of a polyphosphate coacervate best described as a polymeric rich viscoelastic material. Polyphosphate coacervate is an interesting candidate as a biomaterial based on its ability to bind with different cations and to be loaded with drugs. Here, in vitro degradation and hemostatic properties of polyphosphate coacervates are comprehensively evaluated. We show that polyphosphate coacervates degrade and dissolve at a fast rate, losing half of their original mass in a week and transforming to mainly pyrophosphate after 4weeks. This burst dissolution phase happens earlier for the coacervate prepared from very short chain polyphosphate but overall using longer polyphosphate chains does not increase the coacervate longevity significantly. Substitution of Ca with Sr or Ba does not affect the hydrolysis of coacervates but slows down their dissolution into the media. In a whole blood clotting assay, coacervates profoundly decrease the clotting time especially when very long chain polyphosphates are used. While coacervate chain length and divalent cation type were found to significantly affect prothrombin time and thromboplastin time compared to the control, no discernible trends were observed. Platelets adhere in large numbers to coacervates, especially those containing long chain polyphosphate, but the cell morphology observed suggests that they might not to be fully activated. Overall, the long chain polyphosphate coacervate holds a great potential as a resorbable hemostatic agent. STATEMENT OF SIGNIFICANCE Divalent cation additions to a sodium polyphosphate solution result in polyphosphate coacervates, or highly viscous gel-like materials, having great potential in bio-applications such as drug delivery and hemostasis. As these coacervates degrade in aqueous environments, we undertook a comprehensive evaluation to better understand the impact of polyphosphate chain length and divalent cation substitution on this hydrolytic response in order to better predict degradation behavior in the body. Furthermore, there is great interest in the role of polyphosphates in hemostasis following recent publications showing that platelets secrete polyphosphates upon thrombin stimulation. In this paper, we evaluate the hemostatic potential of polyphosphate coacervates as bulk constructs, demonstrating that indeed these materials hold great potential as a degradable hemostatic agent.
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12
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Nikul’shin PV, Maksimov АM, Platonov VЕ. Synthesis of chloropolyfluoroarenes from polyfluoroarenethiols and PCl5. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2016. [DOI: 10.1134/s1070428016020068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Wilson WW, Clough AJ, Haiges R, Rahm M, Christe KO. Syntheses of Diphenylaminodiazidophosphane and Diphenylaminofluoroazidophosphane. Inorg Chem 2015; 54:11859-67. [PMID: 26616103 DOI: 10.1021/acs.inorgchem.5b02097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Diphenylaminodiazidophosphane (C6H5)2NP(N3)2 was synthesized from the corresponding dihalides (C6H5)2NPX2 (X = F, Cl) and (CH3)3SiN3, and was characterized by vibrational and multinuclear NMR spectroscopy. The intermediate compound (C6H5)2NPF(N3) was also observed by NMR spectroscopy in solution. Some physical properties and reactions of all these compounds are discussed.
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Affiliation(s)
- William W Wilson
- Loker Hydrocarbon Research Institute, 837 Bloom Walk, LHI 106, Department of Chemistry, University of Southern California , Los Angeles, California 90089-1661, United States
| | - Andrew J Clough
- Loker Hydrocarbon Research Institute, 837 Bloom Walk, LHI 106, Department of Chemistry, University of Southern California , Los Angeles, California 90089-1661, United States
| | - Ralf Haiges
- Loker Hydrocarbon Research Institute, 837 Bloom Walk, LHI 106, Department of Chemistry, University of Southern California , Los Angeles, California 90089-1661, United States
| | - Martin Rahm
- Baker Laboratory, Cornell University , Ithaca, New York 14853-1301, United States
| | - Karl O Christe
- Loker Hydrocarbon Research Institute, 837 Bloom Walk, LHI 106, Department of Chemistry, University of Southern California , Los Angeles, California 90089-1661, United States
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14
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Ioannou PV, Vachliotis DG, Chrissanthopoulos A. The Reaction of Bunsen's Cacodyl Disulfide, Me 2As(S)-S-AsMe 2, with Iodine: Preparation and Properties of Dimethylarsinosulfenyl Iodide, Me 2As-S-I. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Iliescu S, Plesu N, Macarie L, Popa A, Visa A, Maranescu B, Ilia G. Polymeric Membranes Containing Phosphorus in the Chain for Solid Polymer Electrolytes. PHOSPHORUS SULFUR 2014. [DOI: 10.1080/10426507.2014.905568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Smaranda Iliescu
- Institute of Chemistry Timisoara of Romanian Academy, 300223 Timisoara, Romania
| | - Nicoleta Plesu
- Institute of Chemistry Timisoara of Romanian Academy, 300223 Timisoara, Romania
| | - Lavinia Macarie
- Institute of Chemistry Timisoara of Romanian Academy, 300223 Timisoara, Romania
| | - Adriana Popa
- Institute of Chemistry Timisoara of Romanian Academy, 300223 Timisoara, Romania
| | - Aurelia Visa
- Institute of Chemistry Timisoara of Romanian Academy, 300223 Timisoara, Romania
| | - Bianca Maranescu
- Institute of Chemistry Timisoara of Romanian Academy, 300223 Timisoara, Romania
| | - Gheorghe Ilia
- Institute of Chemistry Timisoara of Romanian Academy, 300223 Timisoara, Romania
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16
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Bounor-Legaré V, Cassagnau P. In situ synthesis of organic–inorganic hybrids or nanocomposites from sol–gel chemistry in molten polymers. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2014.04.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Momeni A, Filiaggi MJ. Comprehensive study of the chelation and coacervation of alkaline earth metals in the presence of sodium polyphosphate solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5256-5266. [PMID: 24746316 DOI: 10.1021/la500474j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The effect of chelation of three alkaline earth metals (Ca, Sr, and Ba) by polyphosphates on the pH and viscosity of the solution is examined and correlated to the phosphate glass properties. Also, the impact of the polyphosphate average degree of polymerization (D(p)) as well as the type and amount of chelated divalent cation on the degradation rate of the chains is studied. Subsequently, the number of divalent cations required for polyphosphate chain agglomeration to form a coacervate, and the resulting composition of these coacervates, was investigated. A decrease in polyphosphate solution pH during chelation was routinely obtained, with a sudden shift in the rate of pH drop occurring around a divalent cation/phosphorus molar ratio of 0.18. Longer chains or cations with a smaller ionic radius accelerated the rate of D(p) reduction. The number of divalent cations required for coacervation depends on different variables such as the polyphosphate concentration, the D(p), and the type of divalent cation. The formed coacervate retains the D(p) of polyphosphate originally used for coacervation, and the resulting Ca/P molar ratio depends largely on the amount of calcium being used during coacervation. Overall, this article helps one to understand the coacervation of polyphosphates in order to exploit their potential as a biomaterial.
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Affiliation(s)
- Arash Momeni
- School of Biomedical Engineering, Dalhousie University , Halifax, Nova Scotia, Canada B3H 3J5
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18
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Phosphorylated silica/polyamide 6 nanocomposites synthesis by in situ sol–gel method in molten conditions: Impact on the fire-retardancy. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.09.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Iliescu S, Zubizarreta L, Plesu N, Macarie L, Popa A, Ilia G. Polymers containing phosphorus groups and polyethers: from synthesis to application. Chem Cent J 2012; 6:132. [PMID: 23134834 PMCID: PMC3549764 DOI: 10.1186/1752-153x-6-132] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 10/30/2012] [Indexed: 11/10/2022] Open
Abstract
UNLABELLED BACKGROUND Phosphorus-containing high performance polymers have aroused wide interest, mainly due to good mechanical properties and their excellent fire resistance. The flexibility of synthetic polyphosphoesters allows the development of polymers in order to obtain solid polymer electrolytes for rechargeable lithium batteries based on solid films with superior fire resistance. RESULTS Novel linear Phosphonate-PEG polymers were synthesized by solution polycondensation of 4-chlorophenyldichlorophosphonate as a linking agent and poly(ethylene glycol)s with different molecular weights in the presence of triethylamine or 1-methylimidazole as acid scavenger. The yields were between 54% and 88% and inherent viscosity between 0.18-0.48 dl/g. Molar masses, Mn were about 26300 g/mol for polyphosphonates with PEG 2000 and 4600 g/mol for polyphosphonates with PEG 200. The LOI values for these polymers and membranes are in the range of 26-29. The membranes based on polyphosphonate with PEG 200 and 2000 showed conductivity between 6 × 10-8 S.cm-1 and 6 × 10-7 S.cm-1 at room temperature and total ionic transference number between 0.87- 0.96. The evolution of conductivity vs. temperature is linear. CONCLUSIONS 1-methylimidazole was found to be better HCl scavenger than triethylamine, and allowed higher yields and more eco-friendly synthesis of the Phosphonate-PEG polymers for SPE. These polymers and membranes based on these polymers showed good LOI values and indicate an improvement of the safety of lithium batteries. The membranes present conductivities around 6 × 10-7 S.cm-1at room temperature and total ionic transference number is higher for membranes based on polymers with high EG unit content. Best results yield 88%, inherent viscosities 0.48 dl/g and Mn 26000 were obtained with 1-methylimidazole and PEG 2000. These membranes based on these polymers showed good LOI values (in the range 26-29%) and indicate an improvement of the safety of lithium batteries.
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Affiliation(s)
- Smaranda Iliescu
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd, Timisoara 300223, Romania.
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Iliescu S, Augusti MG, Fagadar-Cosma E, Plesu N, Fagadar-Cosma G, Macarie L, Popa A, Ilia G. Synthesis of new phosphorus-containing (co)polyesters using solid-liquid phase transfer catalysis and product characterization. Molecules 2012; 17:9090-103. [PMID: 22850325 PMCID: PMC6268441 DOI: 10.3390/molecules17089090] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 07/12/2012] [Accepted: 07/24/2012] [Indexed: 11/30/2022] Open
Abstract
This paper is directed towards the development of safe, and thermally stable solid polymer electrolytes. Linear phosphorus-containing (co)polyesters are described, including their synthesis, thermal analysis, conductivity, and non-flammability. Polycondensation of phenylphosphonic dichloride (PPD) with poly(ethylene glycol) (PEG 12000) with and without bisphenol A (BA) was carried out using solid-liquid phase transfer catalysis. Potassium phosphate is used as base. Yields in the range of 85.0–88.0%, and inherent viscosities in the range of 0.32–0.58 dL/g were obtained. The polymers were characterized by gel permeation chromatography, FT-IR, 1H- and 31P-NMR spectroscopy and thermal analysis. Their flammability was investigated by measuring limiting oxygen index values. The polymers are flame retardants and begin to lose weight in the 190 °C–231 °C range. Solid phosphorus- containing (co)polyesters were complexed with lithium triflate and the resulting ionic conductivity was determined. Conductivities in the range of 10−7–10−8 S cm−1 were obtained.
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Affiliation(s)
- Smaranda Iliescu
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Maite-Gyl Augusti
- Instituto Tecnológico de la Energía, Av. Juan de la Cierva, 24 Parque Tecnológico de Valencia, Paterna 46980 (Valencia), Spain;
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Nicoleta Plesu
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Gheorghe Fagadar-Cosma
- Polytechnic University of Timisoara T. Lalescu Street, No. 2, Timisoara 300-223, Romania;
| | - Lavinia Macarie
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Adriana Popa
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Gheorghe Ilia
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
- Author to whom correspondence should be addressed; ; ; Tel.: +40-025-649-1818; Fax: +40-025-649-1824
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Effect of urea additive on the thermal decomposition kinetics of flame retardant greige cotton nonwoven fabric. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.02.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Yakhvarov D, Trofimova E, Sinyashin O, Kataeva O, Budnikova Y, Lönnecke P, Hey-Hawkins E, Petr A, Krupskaya Y, Kataev V, Klingeler R, Büchner B. New Dinuclear Nickel(II) Complexes: Synthesis, Structure, Electrochemical, and Magnetic Properties. Inorg Chem 2011; 50:4553-8. [DOI: 10.1021/ic2002546] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dmitry Yakhvarov
- A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, Arbuzov Street 8, Kazan 420088, Russian Federation
- IFW Dresden, POB 270116, D-01171, Dresden, Germany
| | - Ekaterina Trofimova
- A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, Arbuzov Street 8, Kazan 420088, Russian Federation
| | - Oleg Sinyashin
- A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, Arbuzov Street 8, Kazan 420088, Russian Federation
| | - Olga Kataeva
- A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, Arbuzov Street 8, Kazan 420088, Russian Federation
- IFW Dresden, POB 270116, D-01171, Dresden, Germany
| | - Yulia Budnikova
- A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, Arbuzov Street 8, Kazan 420088, Russian Federation
| | - Peter Lönnecke
- Institute of Inorganic Chemistry, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
| | - Evamarie Hey-Hawkins
- Institute of Inorganic Chemistry, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
| | - Andreas Petr
- IFW Dresden, POB 270116, D-01171, Dresden, Germany
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Solid-state NMR on thermal and fire residues of bisphenol A polycarbonate/silicone acrylate rubber/bisphenol A bis(diphenyl-phosphate)/(PC/SiR/BDP) and PC/SiR/BDP/zinc borate (PC/SiR/BDP/ZnB) – Part I: PC charring and the impact of BDP and ZnB. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.07.034] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wieker W, Grimmer AR. 31P-Kernresonanzuntersuchungen an den Additions-verbindungen PF5 · CH3CN und PCl5 · C5H5N. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19670071122] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Brahmmananda Rao CVS, Srinivasan TG, Vasudeva Rao PR. Studies on the Extraction of Actinides by Dibutylbutyl Phosphonate. SOLVENT EXTRACTION AND ION EXCHANGE 2010. [DOI: 10.1080/07366290903574606] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Gopalakrishnan J. Aminophosphines: their chemistry and role as ligands and synthons. Appl Organomet Chem 2009. [DOI: 10.1002/aoc.1515] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Reddy CD, Anuradha K, Berlin KD, Sunthankar PS, Mulekar SV. 2,10-DICHLORO-6-(SUBSTITUTED ARYLOXY)DIBENZO[d,g][1,3,6,2]DIOXATHIA-PHOSPHOCIN 6-OXIDES. SYNTHESIS AND SPECTRAL CHARACTERISTICS. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304949009458199] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Reddy PVG, Krishna AB, Reddy MN, Annar S, Reddy CS. Synthesis, Characterisation and Antimicrobial Activity of Novel 2-alkoxycarbonylamino-1,3,2-benzodiazaphosphole 2-oxides. JOURNAL OF CHEMICAL RESEARCH 2009. [DOI: 10.3184/030823409x393655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of some new class of 2-alkoxycarbonylamino-1,3,2-benzodiazaphosphole 2-oxides 4a–j were synthesised by reacting 3,4-diaminobenzophenone (3) with various dichlorophosphinyl carbamates (2) in dry toluene-tetrahydrofuran mixture (1:1) in the presence of triethylamine at 45–50°C. All the title compounds were evaluated for antimicrobial activity to determine their efficacy and were effective in suppressing the growth of bacteria and fungi. The chemical structures of the title products were characterised by IR, 1H, 13C and 31P NMR and mass spectral studies.
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Affiliation(s)
| | - A. Bala Krishna
- Department of Chemistry, Sri Venkateswara University, Tirupati 517502 India
| | | | - S.K. Annar
- Department of Chemistry, Sri Venkateswara University, Tirupati 517502 India
| | - C. Suresh Reddy
- Department of Chemistry, Sri Venkateswara University, Tirupati 517502 India
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Thomas B, Grossmann G. The Nuclear Magnetic Resonance Spectroscopy of15N-Labelled Cyclophosphazenes. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1986v055n07abeh003212] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brahmmananda Rao CVS, Srinivasan TG, Vasudeva Rao PR. Studies on the Extraction of Actinides by Diamylamyl Phosphonate. SOLVENT EXTRACTION AND ION EXCHANGE 2007. [DOI: 10.1080/07366290701634602] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Sharma CS, Jha BK, Nagar PN. Reactions of Ammonium Alkylene Dithiophosphates with Phosphorus Trichloride and Thiophosphoryl Chloride *. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/10426500701418323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Chandra S. Sharma
- a Department of Chemistry , University of Rajasthan , Jaipur , India
| | - Brajesh K. Jha
- a Department of Chemistry , University of Rajasthan , Jaipur , India
| | - Padam N. Nagar
- a Department of Chemistry , University of Rajasthan , Jaipur , India
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Ionova G, Ionov S, Rabbe C, Hill C, Madic C, Guillaumont R, Krupa JC. MECHANISM OF TRIVALENT ACTINIDE/LANTHANIDE SEPARATION USING BIS(2,4,4-TRIMETHYLPENTYL) DITHIOPHOSPHINIC ACID (CYANEX 301) AND NEUTRAL O-BEARING CO-EXTRACTANT SYNERGISTIC MIXTURES. SOLVENT EXTRACTION AND ION EXCHANGE 2007. [DOI: 10.1081/sei-100103277] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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35
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Affiliation(s)
- Feng Gao
- a Department of Chemistry , McGill University , Montréal, Québec, Canada
| | - Karine Auclair
- a Department of Chemistry , McGill University , Montréal, Québec, Canada
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Grim SO, Yankowsky AW. ON THE PHOSPHORUS-31 CHEMICAL SHIFTS OF SUBSTITUTED TRIARYLPHOSPHINES. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/03086647708077711] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Samuel O. Grim
- a Department of Chemistry , University of Maryland , College Park , Maryland , 20742 , USA
| | - Anthony W. Yankowsky
- a Department of Chemistry , University of Maryland , College Park , Maryland , 20742 , USA
- b Fiber Industries, Inc. , P.O. Box 10038, Charlotte , N.C. , 28237
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37
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Tomasz J. P1-(Thymidine 5′-)P1-amino-triphosphate: Synthesis, Hydrolysis and Reaction with Cytidine in Alkali1. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/07328318308078850] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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38
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Tomasz J, Ludwig J. Instability of the Phosphodiester-Amide Interribonucleotide Bond in Neutral Aqueous Solution. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/07328318408079418] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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39
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JARDETZKY O, JARDETZKY CD. Introduction to Magnetic Resonance Spectroscopy Methods and Biochemical Applications. METHODS OF BIOCHEMICAL ANALYSIS 2006; 9:235-410. [PMID: 14451303 DOI: 10.1002/9780470110256.ch7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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40
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Zayed MF, El-khoshnieh YO, El-din NK, Boulos LS. THE REACTION OF PHOSPHITE ESTERS AND TRIS(DIMETHYLAMIN0)PHOSPHINE WITH 1,4- NAPHTHOQUINONEMONOBENZENESULFONIMINE. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/10426509008042123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. F. Zayed
- a National Research Centre , Dokki , CairoA.R.E
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Prochnow D, Grimmer AR, Freude D. Solid-state NMR studies of 17O-enriched pyrophosphates. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2006; 30:69-74. [PMID: 16621468 DOI: 10.1016/j.ssnmr.2006.02.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Revised: 02/15/2006] [Accepted: 02/28/2006] [Indexed: 05/08/2023]
Abstract
For the first time, 17O NMR studies were performed on 17O-enriched crystalline pyrophosphates (magnesium-, sodium- and barium-pyrophosphate) by means of triple-quantum magic-angle spinning (3QMAS) and double-rotation (DOR) in the high external field of 17.6 T. Oxygen atoms in bridging positions (P-OB-P) exhibit a significant higher quadrupole coupling constant compared to oxygen atoms in terminal positions (P-OT). With increasing cationic radius a higher value of the chemical shift of the terminal oxygen atoms is observed.
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Affiliation(s)
- Daniel Prochnow
- Abteilung Grenzflächenphysik, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
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42
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Harkut N, Nagar PN. Synthesis and Properties of 2-Alkylene/Dialkyl Dithiophosphato-2-oxo-1,3,2-dioxaphosphorinanes. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/104265090929922] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Neelam Harkut
- a Department of Chemistry , University of Rajasthan , Jaipur, India
| | - Padam N. Nagar
- a Department of Chemistry , University of Rajasthan , Jaipur, India
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McNally DJ, Lamoureux M, Li J, Kelly J, Brisson JR, Szymanski CM, Jarrell HC. HR-MAS NMR studies of 15N-labeled cells confirm the structure of the O-methyl phosphoramidate CPS modification in Campylobacter jejuni and provide insight into its biosynthesis. CAN J CHEM 2006. [DOI: 10.1139/v06-028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Because Campylobacter jejuni is the leading cause of bacterial food-borne gastroenteritis throughout the world, there is intense effort to determine the mechanisms of infectivity associated with this bacterium. Capsular polysaccharide (CPS) has been shown to be an important virulence factor for C. jejuni and a recent study that examined the 11168V26 strain identified several phase-variable CPS modifications including an unusual O-methyl phosphoramidate (MeOPN) group on C-3 of the GalfNAc residue. In this study, we examined the MeOPN group using homo- and hetero-nuclear high-resolution magic angle spinning (HR-MAS) NMR experiments of whole bacterial cells grown on 15NH4Cl-enriched media. 1H31P HSQC NMR experiments showed that the level of 15N labeling within the MeOPN reached 80%, and a large 1J(15N31P) scalar coupling provided direct evidence that confirmed the structure of the MeOPN as CH3OP(O)(NH2)(OR). Because 15N was also detected within the major outer membrane protein as well as the NAc and NGro groups of CPS, ammonium was concluded to be an important building block used in the synthesis of amino acids and glycan structures in C. jejuni. HR-MAS NMR studies of 15N-labeled cells revealed an unanticipated level of complexity as multiple MeOPN signals were observed within 1H-31P HSQC spectra for the 11168V26 and 11168H strains. While some signals originated from the MeOPN at C-3 of GalfNAc, others were attributed to a novel MeOPN located on D-glycero-α-L-gluco-heptopyranose. Together, these HR-MAS NMR findings shed light on nitrogen metabolism in C. jejuni, confirm the chemical structure of the MeOPN, and demonstrate that the modification occurs on both furanose and pyranose CPS sugars for this bacterium.Key words: Campylobacter jejuni, capsular polysaccharide, HR-MAS NMR, isotope labeling, phosphoramidate.
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Karsch HH, Schreiber KA, Herker M. A New Route to Sila‐ and Phosphaheterocycles: Nucleophilic Aminomethylation. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19971301212] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hans H. Karsch
- Anorganisch‐chemisches Institut der Technischen Universität München, Lichtenbergstraße 4, D‐85747 Garching, Germany Fax: (internat.) +49(0)89/28914421
| | - Kai A. Schreiber
- Anorganisch‐chemisches Institut der Technischen Universität München, Lichtenbergstraße 4, D‐85747 Garching, Germany Fax: (internat.) +49(0)89/28914421
| | - Martin Herker
- Anorganisch‐chemisches Institut der Technischen Universität München, Lichtenbergstraße 4, D‐85747 Garching, Germany Fax: (internat.) +49(0)89/28914421
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Hinke A, Kuchen W. Zur Kenntnis der Organophosphorverbindungen, XXII. 1,2‐Diaryl‐1,2‐dibromdiphosphane. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19831160902] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Axel Hinke
- Institut für Anorganische Chemie und Strukturchemie I der Universität Düsseldorf, Universitätsstr. 1, D‐4000 Düsseldorf
| | - Wilhelm Kuchen
- Institut für Anorganische Chemie und Strukturchemie I der Universität Düsseldorf, Universitätsstr. 1, D‐4000 Düsseldorf
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McNally DJ, Jarrell HC, Li J, Khieu NH, Vinogradov E, Szymanski CM, Brisson JR. The HS:1 serostrain of Campylobacter jejuni has a complex teichoic acid-like capsular polysaccharide with nonstoichiometric fructofuranose branches and O-methyl phosphoramidate groups. FEBS J 2005; 272:4407-22. [PMID: 16128810 DOI: 10.1111/j.1742-4658.2005.04856.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recently, the CPS biosynthetic loci for several strains of Campylobacter jejuni were sequenced and revealed evidence for multiple mechanisms of structural variation. In this study, the CPS structure for the HS:1 serostrain of C. jejuni was determined using mass spectrometry and NMR at 600 MHz equipped with an ultra-sensitive cryogenically cooled probe. Analysis of CPS purified using a mild enzymatic method revealed a teichoic acid-like [-4)-alpha-d-Galp-(1-2)-(R)-Gro-(1-P](n), repeating unit, where Gro is glycerol. Two branches at C-2 and C-3 of galactose were identified as beta-d-fructofuranoses substituted at C-3 with CH(3)OP(O)(NH(2))(OR) groups. Structural heterogeneity was due to nonstoichiometric glycosylation at C-3 of galactose and variable phosphoramidate groups. Identical structural features were found for cell-bound CPS on intact cells using proton homonuclear and (31)P heteronuclear two-dimensional HR-MAS NMR at 500 MHz. In contrast, spectroscopic data acquired for hot water/phenol purified CPS was complicated by the hydrolysis and subsequent loss of labile groups during extraction. Collectively, the results of this study established the importance of using sensitive isolation techniques and HR-MAS NMR to examine CPS structures in vivo when labile groups are present. This study uncovered how incorporation of variable O-methyl phosphoramidate groups on nonstoichiometric fructose branches is used in C. jejuni HS:1 as a strategy to produce a highly complex polysaccharide from its small CPS biosynthetic locus and a limited number of sugars.
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Affiliation(s)
- David J McNally
- Institute for Biological Sciences, National Research Council of Canada, Ottawa, Ontario, Canada
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Ni Dhubhghaill OM, Sadler PJ. The structure and reactivity of arsenic compounds: Biological activity and drug design. STRUCTURE AND BONDING 2005. [DOI: 10.1007/3-540-54261-2_3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
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Bünzli JC, Merbach A. Composés d'addition des halogénures de niobium(V) et de tantale(V). VII. Composés du chlorure de niobium(V) avec l'oxytrichlorure et l'oxytribromure de phosphore. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19720550819] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sharma CS, Nagar PN. DIALKYL(ARYL) PHOSPHORYL DERIVATIVES OF ALKYLENE DITHIOPHOSPHATES. PHOSPHORUS SULFUR 2004. [DOI: 10.1080/10426500490466517] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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50
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