1
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Yadav S, Tiwari R, Verma DK, Kumar D, Adhikary P, Krishnamoorthi S. Synthesis of hydrazine‐fumaryl chloride‐based polyamide and its electrical conductivity studies. POLYM ENG SCI 2023. [DOI: 10.1002/pen.26231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Shashikant Yadav
- Department of Chemistry, Centre of Advanced Study, Institute of Science Banaras Hindu University Varanasi India
| | - Rudramani Tiwari
- Department of Chemistry, Centre of Advanced Study, Institute of Science Banaras Hindu University Varanasi India
| | - Dipendra Kumar Verma
- Department of Chemistry, Centre of Advanced Study, Institute of Science Banaras Hindu University Varanasi India
| | - Devendra Kumar
- Department of Chemistry, Centre of Advanced Study, Institute of Science Banaras Hindu University Varanasi India
| | - Pubali Adhikary
- Central Discovery Centre, Institute of Science Banaras Hindu University Varanasi India
| | - Subramanian Krishnamoorthi
- Department of Chemistry, Centre of Advanced Study, Institute of Science Banaras Hindu University Varanasi India
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2
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Tian Y, Cen H, Zheng X, Zeng Z, Xu W, Hu T, Gong X, Hu C, Wu C. Enhancing the crystallinity and heat resistance of poly(ethylene terephthalate) using
ZnCl
2
‐ionized polyamide‐66 as a heterogeneous nucleator. J Appl Polym Sci 2022. [DOI: 10.1002/app.53358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Yuanfu Tian
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
- Wuhan Kingfa Science & Technology Co., Ltd. Wuhan Hubei China
| | - Hongyu Cen
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
- Hubei Longzhong Laboratory Xiangyang Hubei China
| | - Xuan Zheng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
- Hubei Longzhong Laboratory Xiangyang Hubei China
| | - Zheng Zeng
- Jingmen City Huafu Polymeric Materials Co., Ltd. Jingmen Hubei China
| | - Wen Xu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
| | - Tao Hu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
- Hubei Longzhong Laboratory Xiangyang Hubei China
| | - Xinghou Gong
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
- Hubei Longzhong Laboratory Xiangyang Hubei China
| | - Chuanqun Hu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
- Hubei Longzhong Laboratory Xiangyang Hubei China
| | - Chonggang Wu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering Hubei University of Technology Wuhan Hubei China
- Hubei Longzhong Laboratory Xiangyang Hubei China
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3
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Celina MC, Linde E, Martinez E. Carbonyl Identification and Quantification Uncertainties for Oxidative Polymer Degradation. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109550] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Transient Confinement of the Quaternary Tetramethylammonium Tetrafluoroborate Salt in Nylon 6,6 Fibres: Structural Developments for High Performance Properties. MATERIALS 2021; 14:ma14112938. [PMID: 34072481 PMCID: PMC8198042 DOI: 10.3390/ma14112938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 11/17/2022]
Abstract
A temporary confinement of the quaternary tetramethylammonium tetrafluoroborate (TMA BF4) salt among polyamide molecules has been used for the preparation of aliphatic polyamide nylon 6,6 fibres with high-modulus and high-strength properties. In this method, the suppression or the weakening of the hydrogen bonds between the nylon 6,6 segments has been applied during the conventional low-speed melt spinning process. Thereafter, after the complete hot-drawing stage, the quaternary ammonium salt is fully extracted from the drawn 3 wt.% salt-confined fibres and the nascent fibres are, subsequently, thermally stabilized. The structural developments that are acquired in the confined-nylon 6,6 fibres are ascribed to the developments of the overall fibres' properties due to the confinement process. Surprisingly, unlike the neat nylon 6,6 fibres, the X-ray diffraction (XRD) patterns of the as-spun salt-confined fibres have shown diminishing of the (110)/(010) diffraction plane that obtained pseudohexagonal-like β' structural phase. Moreover, the β' pseudohexagonal-like to α triclinic phase transitions took-place due to the hot-drawing stage (draw-induced phase transitions). Interestingly, the hot-drawing of the as-spun salt-confined nylon 6,6 fibres achieved the same maximum draw ratio of 5.5 at all of the drawing temperatures of 120, 140 and 160 °C. The developments that happened produced the improved values of 43.32 cN/dtex for the tensile-modulus and 6.99 cN/dtex for the tensile-strength of the reverted fibres. The influences of the TMA BF4 salt on the structural developments of the crystal orientations, on the morphological structures and on the improvements of the tensile properties of the nylon 6,6 fibres have been intensively studied.
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5
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Pliquet M, Rapeaux M, Delange F, Bussiere P, Therias S, Gardette J. Multiscale analysis of the thermal degradation of polyamide 6,6: Correlating chemical structure to mechanical properties. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109496] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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6
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Ma N, Liu W, Ma L, He S, Liu H, Zhang Z, Sun A, Huang M, Zhu C. Crystal transition and thermal behavior of Nylon 12. E-POLYMERS 2020. [DOI: 10.1515/epoly-2020-0039] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe polyamide 12 (PA12) with different crystal forms is prepared with three crystallization paths. The crystal structures and corresponding thermal properties are systematically investigated. The results reveal that an α-form and a mixed (α + γ)-form of PA12 can be obtained by casting at 30°C and (40–80°C), respectively. Meanwhile, the γ-form of PA12 can be obtained by both casting at 90°C and slow melt cooling. However, the γ′-form is obtained only by melt quenching. Both the γ and γ′ forms of PA12 exhibit a single melting peak, whereas the α-form exhibits two melting peaks. The higher peak is attributed to the melting of γ-PA12, which originates from the melting–recrystallization of the α-PA12. It is found that the tensile properties of PA12 depend on the crystal forms. Both the γ and γ′-PA12 are strong and tough polymer materials, while α-PA12 is a strong but brittle polymer material.
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Affiliation(s)
- Ning Ma
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
| | - Wentao Liu
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
| | - Lili Ma
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
| | - Suqin He
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
- Henan Key Laboratory of Advanced Nylon Materials and Application (Zhengzhou University), No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
| | - Hao Liu
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
| | - Zhenya Zhang
- Isotope Institute Co., Ltd., Henan Academy of Sciences, Zhengzhou 450015, China
| | - Aihua Sun
- Key Laboratory of Additive Manufacturing Material of Zhejiang Province, Department of Functional Materials and Nano-Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, China
| | - Miaoming Huang
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
| | - Chengshen Zhu
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
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7
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Ding D, Luo J, Wang J, Yu Z, Tian Y, Tan J, Song Z, Tao Q, Hu T, Wu C. Effective improvement in poly(
bisphenol‐A
carbonate) crystallinity by ionization of its polyamide‐66 heterogeneous nucleator: The role of ion‐dipole interactions. POLYMER CRYSTALLIZATION 2020. [DOI: 10.1002/pcr2.10130] [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]
Affiliation(s)
- Dachuan Ding
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Jingjin Luo
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Jie Wang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Zixin Yu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Yuanfu Tian
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Jinqiang Tan
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Zhiyuan Song
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Qian Tao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Tao Hu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
| | - Chonggang Wu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light‐Weight Materials and Processing, and School of Materials and Chemical EngineeringHubei University of Technology Wuhan Hubei China
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8
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Hao LT, Eom Y, Tran TH, Koo JM, Jegal J, Hwang SY, Oh DX, Park J. Rediscovery of nylon upgraded by interactive biorenewable nano-fillers. NANOSCALE 2020; 12:2393-2405. [PMID: 31742304 DOI: 10.1039/c9nr08091k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inorganic nanomaterials can only stiffen nylon with a significant loss of its toughness and ductility. Furthermore, they are not eco-friendly. In this study, the facile tuning of nylon's mechanical properties from stiff to tough was achieved, using cellulose nanocrystals (CNC) and chitosan nanowhiskers (CSW) as biorenewable fillers. The interaction between the matrix and filler was controlled by varying the types of fillers and the employed processing methods, including in situ interfacial polymerization and post-solution blending. Particularly with CSW, the in situ-incorporated filler with a 0.4 wt% loading strengthened nylon and led to a 1.9-fold increase in its Young's modulus (2.6 GPa) and a 1.7-fold increase in its ultimate tensile strength (106 MPa), whereas the solution-blended filler with a 0.3 wt% loading toughened the polymer with a 2.1-fold increase (104 MJ m-3). Compared with inorganic nanocomposites, these interactive biofiller-nanocomposites are unrivaled in their reinforcing performance when normalized by filler content. This stiff-to-tough tuning trend is more pronounced in the CSW system than in the CNC system. Covalent polymer grafts on the amine surface of CSW enhanced interfacial interactions in the in situ method, whereas its cationic surface charges plasticized the polymer matrix in the blending method. This proteinaceous composite-mimicking all-organic nylon nanocomposite opens new possibilities in the field of reinforced engineering plastics.
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Affiliation(s)
- Lam Tan Hao
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Youngho Eom
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Department of Polymer Engineering, Pukyong National University, Busan, 48513, Republic of Korea
| | - Thang Hong Tran
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
| | - Jonggeon Jegal
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
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9
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Chang D, Li T, Li L, Jakowski J, Huang J, Keum JK, Lee B, Bonnesen PV, Zhou M, Garashchuk S, Sumpter BG, Hong K. Selectively Deuterated Poly(ε-caprolactone)s: Synthesis and Isotope Effects on the Crystal Structures and Properties. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01851] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Dongsook Chang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Tianyu Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Lengwan Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jacek Jakowski
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jingsong Huang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jong Kahk Keum
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Chemical and Engineering Materials Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Byeongdu Lee
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Peter V. Bonnesen
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Mi Zhou
- College of Materials Science and Engineering, Zhejiang University of Technology, Zhejiang 310014, China
| | - Sophya Garashchuk
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Bobby G. Sumpter
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Kunlun Hong
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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10
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Maté B, Molpeceres G, Tanarro I, Peláez RJ, Guillemin JC, Cernicharo J, Herrero VJ. Stability of CH 3NCO in astronomical ices under energetic processing. A laboratory study. THE ASTROPHYSICAL JOURNAL 2018; 861:61. [PMID: 30185993 PMCID: PMC6120682 DOI: 10.3847/1538-4357/aac826] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Methyl isocyanate (CH3NCO) was recently found in hot cores and suggested on comet 67P/CG. The incorporation of this molecule into astrochemical networks requires data on its formation and destruction. In this work, ices of pure CH3NCO and of CH3NCO(4-5%)/H2O mixtures deposited at 20 K were irradiated with a UV D2 lamp (120-400 nm) and bombarded by 5 keV electrons to mimic the secondary electrons produced by cosmic rays (CRs). The destruction of CH3NCO was studied using IR spectroscopy. After processing, the νa-NCO band of CH3NCO disappeared and IR bands corresponding to CO, CO2, OCN- and HCN/CN- appeared instead. The products of photon and electron processing were very similar. Destruction cross sections and half-life doses were derived from the measurements. Water ice provides a good shield against UV irradiation (half-life dose of ~ 64 eV molecule-1 for CH3NCO in water-ice), but not so good against high-energy electrons (half-life dose ~ 18 eV molecule-1). It was also found that CH3NCO does not react with H2O over the 20-200 K temperature range. These results indicate that hypothetical CH3NCO in the ices of dense clouds should be stable against UV photons and relatively stable against CRs over the lifetime of a cloud (~ 107 yr), and could sublime in the hot core phase. On the surface of a Kuiper belt object (the original location of comet 67P/CG) the molecule would be swiftly destroyed, both by photons and CRs, but embedded below just 10 μm of water-ice, the molecule could survive for ~ 109 yr.
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Affiliation(s)
- B. Maté
- Instituto de Estructura de la Materia (IEM-CSIC), Serrano 121-123, 28006 Madrid, Spain
| | - G. Molpeceres
- Instituto de Estructura de la Materia (IEM-CSIC), Serrano 121-123, 28006 Madrid, Spain
| | - I. Tanarro
- Instituto de Estructura de la Materia (IEM-CSIC), Serrano 121-123, 28006 Madrid, Spain
| | - R. J. Peláez
- Instituto de Estructura de la Materia (IEM-CSIC), Serrano 121-123, 28006 Madrid, Spain
| | - J. C. Guillemin
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR – UMR6226, F-35000 Rennes, France
| | - J. Cernicharo
- Instituto de Física Fundamental (IFF-CSIC), Serrano 121-123, 28006, Madrid, Spain
| | - V. J. Herrero
- Instituto de Estructura de la Materia (IEM-CSIC), Serrano 121-123, 28006 Madrid, Spain
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11
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Blain M, Cornille A, Boutevin B, Auvergne R, Benazet D, Andrioletti B, Caillol S. Hydrogen bonds prevent obtaining high molar mass PHUs. J Appl Polym Sci 2017. [DOI: 10.1002/app.44958] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Marine Blain
- Institut Charles Gerhardt UMR 5253 - CNRS; Université Montpellier; ENSCM - 8, Rue Ecole Normale Montpellier 34296 France
- Université Claude Bernard Lyon 1, Université de Lyon, ICBMS UMR CNRS 5246, Bâtiment Curien (CPE); 43 Bd du 11 Novembre 1918 Villeurbanne Cedex 69 622 France
- JUXTA; 5 rue de la Jalesie, BP 71039 Audincourt Cedex 25401 France
| | - Adrien Cornille
- Institut Charles Gerhardt UMR 5253 - CNRS; Université Montpellier; ENSCM - 8, Rue Ecole Normale Montpellier 34296 France
| | - Bernard Boutevin
- Institut Charles Gerhardt UMR 5253 - CNRS; Université Montpellier; ENSCM - 8, Rue Ecole Normale Montpellier 34296 France
| | - Rémi Auvergne
- Institut Charles Gerhardt UMR 5253 - CNRS; Université Montpellier; ENSCM - 8, Rue Ecole Normale Montpellier 34296 France
| | | | - Bruno Andrioletti
- Université Claude Bernard Lyon 1, Université de Lyon, ICBMS UMR CNRS 5246, Bâtiment Curien (CPE); 43 Bd du 11 Novembre 1918 Villeurbanne Cedex 69 622 France
| | - Sylvain Caillol
- Institut Charles Gerhardt UMR 5253 - CNRS; Université Montpellier; ENSCM - 8, Rue Ecole Normale Montpellier 34296 France
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12
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Madanagopal A, Periandy S, Gayathri P, Ramalingam S, Xavier S. Molecular structure activity on pharmaceutical applications of Phenacetin using spectroscopic investigation. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.08.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Scavuzzo JJ, Yan X, Zhao Y, Scherger JD, Chen J, Zhang S, Liu H, Gao M, Li T, Zhao X, Hamed GR, Foster MD, Jia L. Supramolecular Elastomers. Particulate β-Sheet Nanocrystal-Reinforced Synthetic Elastic Networks. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joseph J. Scavuzzo
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Xuesong Yan
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Yihong Zhao
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Jacob D. Scherger
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Junyi Chen
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Shuo Zhang
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Hao Liu
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Min Gao
- Liquid
Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, United States
| | - Tao Li
- X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Xiuying Zhao
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
- State
Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Gary R. Hamed
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Mark D. Foster
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Li Jia
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
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14
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Isoda H, Furukawa Y. Electric-Field-Induced Dynamics of Polymer Chains in a Ferroelectric Melt-Quenched Cold-Drawn Film of Nylon-11 Using Infrared Spectroscopy. J Phys Chem B 2015; 119:14309-14. [DOI: 10.1021/acs.jpcb.5b08104] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hayato Isoda
- Department
of Chemistry and
Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yukio Furukawa
- Department
of Chemistry and
Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo 169-8555, Japan
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15
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Ortmann P, Lemke TA, Mecking S. Long-Spaced Polyamides: Elucidating the Gap between Polyethylene Crystallinity and Hydrogen Bonding. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00060] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Patrick Ortmann
- Chair of
Chemical Materials
Science, Department of Chemistry, University of Konstanz, Universitätsstrasse
10, D-78457 Konstanz, Germany
| | - Tobias A. Lemke
- Chair of
Chemical Materials
Science, Department of Chemistry, University of Konstanz, Universitätsstrasse
10, D-78457 Konstanz, Germany
| | - Stefan Mecking
- Chair of
Chemical Materials
Science, Department of Chemistry, University of Konstanz, Universitätsstrasse
10, D-78457 Konstanz, Germany
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16
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Terraza CA, Tagle LH, Tundidor-Camba A, González-Henríquez CM, Coll D, Sarabia MM. Silarylene-containing oligo(ether-amide)s based on bis(4-(4-amino phenoxy)phenyl)dimethylsilane. Effect of the dicarboxylic acid structure on some properties. RSC Adv 2015. [DOI: 10.1039/c5ra03529e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Inherent viscosity and MALDI-TOF analyses suggest the formation of oligomeric chains with sequences A–B, (A–B)2 and (A–B)3. The properties and therefore the eventual applications of these materials are modulated by the flexibility and the aromatic content of the chains.
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Affiliation(s)
- Claudio A. Terraza
- Pontificia Universidad Católica de Chile
- Facultad de Química
- Santiago
- Chile
| | - Luis H. Tagle
- Pontificia Universidad Católica de Chile
- Facultad de Química
- Santiago
- Chile
- Pontificia Universidad Católica de Chile
| | - Alain Tundidor-Camba
- Pontificia Universidad Católica de Chile
- Facultad de Química
- Santiago
- Chile
- Pontificia Universidad Católica de Chile
| | - Carmen M. González-Henríquez
- Universidad Tecnológica Metropolitana
- Facultad de Ciencias Naturales
- Matemáticas y del Medio Ambiente
- Santiago
- Chile
| | - Deysma Coll
- Pontificia Universidad Católica de Chile
- Facultad de Química
- Santiago
- Chile
- Pontificia Universidad Católica de Chile
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17
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Babahan I, Engle JT, Kumar N, Ziegler CJ, Jia L. Coordination chemistry of bidentate phosphine ligands with hydrogen-bonding arms: Picket-fence rhodium complexes. Polyhedron 2014. [DOI: 10.1016/j.poly.2013.11.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Prasittichai C, Zhou H, Bent SF. Area selective molecular layer deposition of polyurea films. ACS APPLIED MATERIALS & INTERFACES 2013; 5:13391-6. [PMID: 24229350 DOI: 10.1021/am4043195] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Patterned organic thin films with submicrometer features are of great importance in applications such as nanoelectronics and optoelectronics. We present here a new approach for creating patterned organic films using area selective molecular layer deposition (MLD). MLD is a technique that allows for conformal deposition of nanoscale organic thin films with exceptional control over vertical thickness and composition. By expanding the technique to allow for area selective MLD, lateral patterning of the film can be achieved. In this work, polyurea thin films were deposited by alternating pulses of 1,4-phenylenediisocyanate (PDIC) and ethylenediamine (ED) in a layer-by-layer fashion with a linear growth rate of 5.3 Å/cycle. Studies were carried out to determine whether self-assembled monolayer (SAM) formed from octadecyltrichlorosilane (ODTS) could block MLD on silicon substrates. Results show that the MLD process is impeded by the SAM. To test lateral patterning in MLD, SAMs were patterned onto silicon substrates using two different approaches. In one approach, SiO2-coated Si(100) substrates were patterned with an ODTS SAM by soft lithography in a well-controlled environment. In the second approach, patterned ODTS SAM was formed on H-Si/SiO2 patterned wafers by employing the chemically selective adsorption of ODTS on SiO2 over H-Si. Auger electron spectroscopy results revealed that the polyurea film is deposited predominantly on the ODTS-free regions of both patterned substrates, indicating sufficient blocking of MLD by the ODTS SAM layer to replicate the pattern. The method we describe here offers a novel approach for fabricating high quality, three-dimensional organic structures.
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Affiliation(s)
- Chaiya Prasittichai
- Department of Chemical Engineering and ‡Department of Chemistry, Stanford University , Stanford, California 94305-5025, United States
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19
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El-Mazry C, Ben Hassine M, Correc O, Colin X. Thermal oxidation kinetics of additive free polyamide 6-6. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2012.11.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Fleming GD, Celis F, Aracena A, Campos-Vallette M, Aliaga AE, Koch R. Vibrational and scaled quantum chemical study of O,O-dimethyl S-methylcarbamoylmethyl phosphorodithioate, dimethoate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 89:222-230. [PMID: 22261110 DOI: 10.1016/j.saa.2011.12.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 11/17/2011] [Accepted: 12/15/2011] [Indexed: 05/31/2023]
Abstract
Infrared and Raman spectra of O,O-dimethyl S-methylcarbamoylmethylphosphorodithioate, dimethoate, have been recorded. Density functional theory, DFT, with the B3LYP functional was used for the optimization of the ground state geometry and simulation of the infrared and Raman spectra of this molecule. Calculated geometrical parameters fit very well with the experimental ones. Based on the recorded data, the DFT results and a normal coordinate analysis based on a scaled quantum mechanical (SQM) force field approach, a complete vibrational assignment was made for the first time.
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Affiliation(s)
- Guillermo Diaz Fleming
- Molecular and Atomic Spectroscopy Laboratory, Department of Chemistry, Faculty of Sciences, University of Playa Ancha, Valparaiso, Casilla 34-V, Chile.
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21
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Arfin T, Falch A, Kriek RJ. Evaluation of charge density and the theory for calculating membrane potential for a nano-composite nylon-6,6 nickel phosphate membrane. Phys Chem Chem Phys 2012; 14:16760-9. [DOI: 10.1039/c2cp42683h] [Citation(s) in RCA: 37] [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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22
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Mechanism in Brill transition of polyamide 66 studied by two-dimensional correlation infrared spectroscopy. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2010.11.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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2D IR provides evidence for mobile water molecules in beta-amyloid fibrils. Proc Natl Acad Sci U S A 2009; 106:17751-6. [PMID: 19815514 DOI: 10.1073/pnas.0909888106] [Citation(s) in RCA: 142] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The motion of water molecules close to amide groups causes their vibrational frequencies to vary rapidly in time. These variations are uniquely sensed by 2-dimensional infrared spectroscopy (2D IR). Here, it is proposed from 2-dimensional experiments on fibrils of amyloid beta (Abeta)40 that there are water molecules in the fibrils. The spatial locations of the water (D(2)O) were inferred from the responses of 18 amide modes of Abeta40 labeled with (13)C = (18)O. Fast frequency variations were found for residues L17 and V18 and for the apposed residues L34 and V36, suggesting cavities or channels containing mobile water molecules can form between the 2 sheets. Spectroscopic analysis showed that there are 1.2 water molecules per strand in the fibrils. The (13)C = (18)O substitution of 1 residue per strand creates a linear array of isotopologs along the fibril axis that manifests clearly identifiable vibrational transitions. Here, it is shown from the distributions of amide-I' vibrational frequencies that the regularity of these chains is strongly residue dependent and in most cases the distorted regions are also those associated with the putative mobile water molecules. It is proposed that Abeta40 fibrils contain structurally significant mobile water molecules within the intersheet region.
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24
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Vinken E, Terry AE, Spoelstra AB, Koning CE, Rastogi S. Influence of superheated water on the hydrogen bonding and crystallography of piperazine-based (Co)polyamides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5294-5303. [PMID: 19397364 DOI: 10.1021/la804046r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Here we demonstrate that superheated water is a solvent for polyamide 2,14 and piperazine-based copolyamides up to a piperazine content of 62 mol %. The incorporation of piperazine allows for a variation of the hydrogen bond density without altering the crystal structure (i.e., the piperazine units cocrystallize with the PA2,14 units (Hoffmann, S.; Vanhaecht, B.; Devroede, J.; Bras, W.; Koning, C. E.; Rastogi, S. Macromolecules 2005, 38, 1797-1803). It is shown that the crystallization of PA2,14 from superheated water greatly influences the crystal structure. Water molecules incorporated in the PA2,14 crystal lattice cause a slip on the hydrogen bonded planes, resulting in a coexistence of a triclinic and a monoclinic crystal structure. On heating above the Brill transition, the water molecules exit from the lattice, restoring the triclinic crystal structure. With increasing piperazine content, and hence decreasing hydrogen bond density, the dissolution temperature decreases. It is only possible to grow single crystals from superheated water up to a piperazine content of 62 mol %. For these single crystals, the incorporation of water molecules in the vicinity of the amide group is seen by the presence of COO- stretch vibrations with FTIR spectroscopy. These vibrations disappear on heating above the Brill transition temperature, and the water molecules leave the amide groups. For copolyamides with more than 62 mol % piperazine, no Brill transition is observed, no single crystals can be grown from water, and no water molecules are observed in the vicinity of the amide groups (Vinken, E.; Terry, A. E.; Hoffmann, S.; Vanhaecht, B.; Koning, C. E.; Rastogi, S. Macromolecules 2006, 39, 2546-2552). The high piperazine content (co)polyamides have fewer hydrogen bond donors and are therefore less likely to have interactions with the water molecules. This work demonstrates the relation among the Brill transition, the dissolution of polyamide in superheated water, and its influence on the hydrogen bonds and the amide groups.
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Affiliation(s)
- Esther Vinken
- Laboratory of Polymer Technology, Department of Chemical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
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25
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Gonçalves ES, Poulsen L, Ogilby PR. Mechanism of the temperature-dependent degradation of polyamide 66 films exposed to water. Polym Degrad Stab 2007. [DOI: 10.1016/j.polymdegradstab.2007.08.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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27
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Koenig JL, Agboatwalla MC. Infrared studies of chain folding in polymers. v. polyhexamethylene adipamide. J MACROMOL SCI B 2006. [DOI: 10.1080/00222346808212871] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. L. Koenig
- a Division of Polymer Science Case Western Reserve University , Cleveland, Ohio
| | - M. C. Agboatwalla
- a Division of Polymer Science Case Western Reserve University , Cleveland, Ohio
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28
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Affiliation(s)
- C. G. Cannon
- a Research Department , ICI Fibres Ltd. , Pontypool, United Kingdom
| | - P. H. Harris
- a Research Department , ICI Fibres Ltd. , Pontypool, United Kingdom
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29
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Low frequency motions in polymers as measured by neutron inelastic scattering. ADVANCES IN POLYMER SCIENCE 2006. [DOI: 10.1007/bfb0051047] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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30
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Higgins FS, Magliocco LG, Colthup NB. Infrared and Raman spectroscopy study of alkyl hydroxamic acid and alkyl hydroxamate isomers. APPLIED SPECTROSCOPY 2006; 60:279-87. [PMID: 16608571 DOI: 10.1366/000370206776342517] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The isomeric structures of alkyl hydroxamic acid, as well as its potassium salt, sodium salt, and an alcohol complex, have been characterized in the solid, liquid, and gaseous states by Fourier transform infrared (FT-IR) and FT-Raman spectroscopy. Raman spectroscopy provides insight into the long-standing debate over the isomeric composition of hydroxamates in the solid state and in an aqueous basic solution. IR and Raman results are not consistent with the enol isomer existing in the solid or liquid states of octyl or decyl hydroxamic acid, potassium hydroxamate, and sodium hydroxamate. The infrared and Raman spectra of these compounds provide clear and convincing evidence regarding their chemical structure, mainly from amide-type carbonyl, NH bending, and OH/NH stretching bands. Vibrational spectroscopy is sensitive to polar (FT-IR) and non-polar (FT-Raman) vibrations and the influence of ionic and hydrogen bonding on these vibrations, and these abilities are particularly useful for characterizing keto versus enol and trans versus cis conformations in alkyl hydroxamic acid and its salts. Evolved gas analysis (EGA) in a nitrogen gas environment of alkyl hydroxamic acid and its salts is also discussed. EGA data reveal that water is not incorporated into the solid-state crystal structure of alkyl hydroxamic acid or the potassium salt; however, the sodium salt form is found to have a stable hydrate conformer that is shown to affect the Z isomer (NH trans to carbonyl, OH cis to carbonyl) IR absorbance bands. EGA data also indicates results that could be of interest to bio-pharmaceutical applications involving nitric oxide donation.
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Affiliation(s)
- Franklin S Higgins
- Cytec Industries Inc., Research and Development, 1937 West Main Street, Stamford, Connecticut 06904, USA.
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31
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Murthy NS. Hydrogen bonding, mobility, and structural transitions in aliphatic polyamides. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/polb.20833] [Citation(s) in RCA: 172] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Kew SJ, Hall EAH. Structural effect of polymerisation and dehydration on bolaamphiphilic polydiacetylene assemblies. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b600931j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Electron beam irradiated polyamide-6,6 films—I: characterization by wide angle X-ray scattering and infrared spectroscopy. Radiat Phys Chem Oxf Engl 1993 2005. [DOI: 10.1016/j.radphyschem.2004.05.022] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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34
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Lu Y, Zhang Y, Zhang G, Yang M, Yan S, Shen D. Influence of thermal processing on the perfection of crystals in polyamide 66 and polyamide 66/clay nanocomposites. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.10.025] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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36
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Cooper SJ, Coogan M, Everall N, Priestnall I. A polarised μ-FTIR study on a model system for nylon 6 6: implications for the nylon Brill structure. POLYMER 2001. [DOI: 10.1016/s0032-3861(01)00566-3] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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37
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Aharoni SM. Why are the Moduli of Poly(ethylene terephthalate) So Much Higher Than Those of Polycaproamide? INT J POLYM MATER PO 2001. [DOI: 10.1080/00914030108035117] [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]
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38
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39
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Jones NA, Atkins EDT, Hill MJ. Comparison of Structures and Behavior on Heating of Solution-Grown, Chain-Folded Lamellar Crystals of 31 Even−Even Nylons. Macromolecules 2000. [DOI: 10.1021/ma9919559] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nathan A. Jones
- H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K
| | - Edward D. T. Atkins
- H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K
| | - Mary J. Hill
- H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K
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40
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Franco L, Subirana JA, Puiggalí J. Structure and Morphology of Odd Polyoxamides [Nylon 9,2]. A New Example of Hydrogen-Bonding Interactions in Two Different Directions. Macromolecules 1998. [DOI: 10.1021/ma971599z] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- L. Franco
- Departament d'Enginyeria Química, ETS d'Enginyers Industrials, Universitat Politècnica de Catalunya, Diagonal 647, Barcelona 08028, Spain
| | - J. A. Subirana
- Departament d'Enginyeria Química, ETS d'Enginyers Industrials, Universitat Politècnica de Catalunya, Diagonal 647, Barcelona 08028, Spain
| | - J. Puiggalí
- Departament d'Enginyeria Química, ETS d'Enginyers Industrials, Universitat Politècnica de Catalunya, Diagonal 647, Barcelona 08028, Spain
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41
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López-Carrasquero F, García-Alvarez M, Navas JJ, Alemán C, Muñoz-Guerra S. Structural Study on Poly(β-l-aspartate)s with Short Alkyl Side Chains: Helical and Extended Crystal Forms. Macromolecules 1996. [DOI: 10.1021/ma9607123] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. López-Carrasquero
- Departamento de Ingeniería Química, Universidad Politécnica de Cataluña, ETSIIB, Diagonal 647, E-08028 Barcelona, Spain
| | - M. García-Alvarez
- Departamento de Ingeniería Química, Universidad Politécnica de Cataluña, ETSIIB, Diagonal 647, E-08028 Barcelona, Spain
| | - J. J. Navas
- Departamento de Ingeniería Química, Universidad Politécnica de Cataluña, ETSIIB, Diagonal 647, E-08028 Barcelona, Spain
| | - C. Alemán
- Departamento de Ingeniería Química, Universidad Politécnica de Cataluña, ETSIIB, Diagonal 647, E-08028 Barcelona, Spain
| | - S. Muñoz-Guerra
- Departamento de Ingeniería Química, Universidad Politécnica de Cataluña, ETSIIB, Diagonal 647, E-08028 Barcelona, Spain
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42
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Iribarren I, Alemán C, Bou JJ, Muñoz-Guerra S. Crystal Structures of Optically Active Polyamides Derived from Di-O-methyl-l-tartaric Acid and 1,n-Alkanediamines: A Study Combining Energy Calculations, Diffraction Analysis, and Modeling Simulations. Macromolecules 1996. [DOI: 10.1021/ma951394v] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- I. Iribarren
- Departament d'Enginyeria Química, Universitat Politècnica de Catalunya ETSEIB, Diagonal 647, 08028 Barcelona, Spain
| | - C. Alemán
- Departament d'Enginyeria Química, Universitat Politècnica de Catalunya ETSEIB, Diagonal 647, 08028 Barcelona, Spain
| | - J. J. Bou
- Departament d'Enginyeria Química, Universitat Politècnica de Catalunya ETSEIB, Diagonal 647, 08028 Barcelona, Spain
| | - S. Muñoz-Guerra
- Departament d'Enginyeria Química, Universitat Politècnica de Catalunya ETSEIB, Diagonal 647, 08028 Barcelona, Spain
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43
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Chatzi E, Urban M, Ishida H, Koenig J. Determination of the accessibility of NH groups of Kevlar 49 fibres by photoacoustic FTi.r. spectroscopy. POLYMER 1986. [DOI: 10.1016/0032-3861(86)90171-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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44
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Shnyrov VL, Sukhomudrenko AG. Dynamic properties of bacteriorhodopsin in purple membranes upon heat treatment. Biophys Chem 1986; 24:1-4. [PMID: 17007792 DOI: 10.1016/0301-4622(86)85052-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/1985] [Revised: 02/04/1986] [Accepted: 02/04/1986] [Indexed: 11/24/2022]
Abstract
Reversible temperature-dependent conformational changes in bacteriorhodopsin of the purple membranes from Halobacterium halobium have been studied by the method of deuterium exchange. A noticeable increase in the mobility of structured peptide groups in bacteriorhodopsin was revealed upon reorganization of the supermolecular structure at about 60 degrees C. In the supermolecular structure formed, bacteriorhodopsin molecules have no contacts with external medium at 75-80 degrees C. Membrane destruction results in a drastic increase in molecular mobility within the narrow temperature range 100-110 degrees C. The effects observed are induced by predenaturation changes in the bacteriorhodopsin structure and rearrangements in the structure of a protein-lipid complex. The temperature dependence of the number of peptide groups involved in reversible conformational rearrangements is in good agreement with the microcalorimetry data.
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Affiliation(s)
- V L Shnyrov
- Institute of Biological Physics, U.S.S.R. Academy of Sciences, Pushchino, 142292 Moscow Region, U.S.S.R
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45
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Lithium-iodine solid electrolyte galvanic cells using iodine adducts of nylon-6 as active materials of positive electrodes. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/0368-1874(85)80135-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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46
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47
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Busico V, Cernicchiaro P, Scopa A, Vacatello M. Structural organization of polar-group-containing polymers in the molten state. Colloid Polym Sci 1983. [DOI: 10.1007/bf01469667] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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48
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Lazarev YA, Terpugov EL. Effect of water on the structure of bacteriorhodopsin and photochemical processes in purple membranes. BIOCHIMICA ET BIOPHYSICA ACTA 1980; 590:324-38. [PMID: 7378392 DOI: 10.1016/0005-2728(80)90203-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Visible and infrared spectra of bacteriorhodopsin films under different humidities at room and low temperatures are investigated. On dehydration of purple membranes at room temperatures an additional chromophore state with the absorption band at 506 nm is revealed. The photocycle of purple membranes in the dry state is devoid of the 550 nm intermediate and involves the long-lived intermediate at 412 nm. As water is removed, the 550 nm intermediate becomes undetectable. The analysis of the infrared spectra shows that dehydration does not affect the ordering of the main network of the interpeptide hydrogen bonds which stabilizes the alpha-helical conformation (slightly distorted in the intial humid dark- and light-adapted state); light adaptation (cis-trans isomerization) of bacteriorhodopsin results in an increase of sorbed water in purple membranes. Dehydration of purple membranes decreases the reaction rate of cis-trans isomerization.
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49
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Lazarev YA, Lazareva AV, Shibnev VA, Esipova NG. Infrared spectra and structure of synthetic polytripeptides. Biopolymers 1978. [DOI: 10.1002/bip.1978.360170508] [Citation(s) in RCA: 40] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Gogolewski S, Pennings A. Crystallization of polyamides under elevated pressure: 3. The morphology and structure of pressure-crystallized nylon-6 (polycapramide). POLYMER 1977. [DOI: 10.1016/0032-3861(77)90230-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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