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Absorption and Isomerization of Azobenzene Guest Molecules in Polymeric Nanoporous Crystalline Phases. CHEMISTRY 2021. [DOI: 10.3390/chemistry3030078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
PPO co-crystalline (CC) films including azobenzene guest molecules have been prepared and characterized by WAXD, FTIR and UV-Visible measurements. Isomerization reactions of azobenzene (photo-induced trans to cis and spontaneous cis to trans) included in α and β nanoporous-crystalline (NC) phases leading to CC phases, or simply absorbed in amorphous phase have been studied on thick and thin films. Spectroscopic analysis shows that photo-isomerization of azobenzene occurs without expulsion of azobenzene guest molecules from crystalline phases. Sorption studies of α and β NC films immersed into photo-isomerized azobenzene solution reveal a higher selectivity of the β NC phase toward cis azobenzene isomer than the α NC phase, inducing us to propose the β NC phase as particularly suitable for absorbing spherically bulky guest molecules.
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Liu C, Brandenburg JG, Valsson O, Kremer K, Bereau T. Free-energy landscape of polymer-crystal polymorphism. SOFT MATTER 2020; 16:9683-9692. [PMID: 33000842 DOI: 10.1039/d0sm01342k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polymorphism rationalizes how processing can control the final structure of a material. The rugged free-energy landscape and exceedingly slow kinetics in the solid state have so far hampered computational investigations. We report for the first time the free-energy landscape of a polymorphic crystalline polymer, syndiotactic polystyrene. Coarse-grained metadynamics simulations allow us to efficiently sample the landscape at large. The free-energy difference between the two main polymorphs, α and β, is further investigated by quantum-chemical calculations. The results of the two methods are in line with experimental observations: they predict β as the more stable polymorph under standard conditions. Critically, the free-energy landscape suggests how the α polymorph may lead to experimentally observed kinetic traps. The combination of multiscale modeling, enhanced sampling, and quantum-chemical calculations offers an appealing strategy to uncover complex free-energy landscapes with polymorphic behavior.
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Affiliation(s)
- Chan Liu
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
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Ono H, Fujiwara H, Onoue K, Nishimura S. FT-IR study of state of molecular hydrogen in bisphenol A polycarbonate dissolved by high-pressure hydrogen gas exposure. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.137053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Liu C, Kremer K, Bereau T. Polymorphism of Syndiotactic Polystyrene Crystals from Multiscale Simulations. ADVANCED THEORY AND SIMULATIONS 2018. [DOI: 10.1002/adts.201800024] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Chan Liu
- Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
| | - Kurt Kremer
- Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
| | - Tristan Bereau
- Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
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Rizzo P, Cozzolino A, Albunia AR, Giuffrè AM, Sicari V, Di Maio L, Daniel C, Venditto V, Galimberti M, Mensitieri G, Guerra G. Packaging technology for improving shelf-life of fruits based on a nanoporous-crystalline polymer. J Appl Polym Sci 2018. [DOI: 10.1002/app.46256] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Paola Rizzo
- NanoActive Film s.r.l; Fisciano Italy
- Department of Chemistry and Biology and INSTM Research Unit; University of Salerno, Via Giovanni Paolo II 132; Fisciano Salerno 84084 Italy
| | - Antonietta Cozzolino
- Department of Chemistry and Biology and INSTM Research Unit; University of Salerno, Via Giovanni Paolo II 132; Fisciano Salerno 84084 Italy
| | - Alexandra R. Albunia
- NanoActive Film s.r.l; Fisciano Italy
- Borealis Polyolefine GmbH, St.-Peter-Strasse 25; Linz 4021 Austria
| | - Angelo Maria Giuffrè
- Department of Agraria; University “Mediterranea” of Reggio Calabria; Salita Melissari Reggio Calabria 89124 Italy
| | - Vincenzo Sicari
- Department of Agraria; University “Mediterranea” of Reggio Calabria; Salita Melissari Reggio Calabria 89124 Italy
| | - Luciano Di Maio
- Department of Industrial Engineering; University of Salerno, Via Giovanni Paolo II 132; Fisciano SA 84084 Italy
| | - Christophe Daniel
- NanoActive Film s.r.l; Fisciano Italy
- Department of Chemistry and Biology and INSTM Research Unit; University of Salerno, Via Giovanni Paolo II 132; Fisciano Salerno 84084 Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology and INSTM Research Unit; University of Salerno, Via Giovanni Paolo II 132; Fisciano Salerno 84084 Italy
| | - Maurizio Galimberti
- NanoActive Film s.r.l; Fisciano Italy
- Department of Chemistry, Materials, and Chemical Engineering; Politecnico di Milano, via Mancinelli 7; Milan 20131 Italy
| | - Giuseppe Mensitieri
- Department of Materials and Production Engineering; University of Naples Federico II, P.le Tecchio 80; Naples 80125 Italy
| | - Gaetano Guerra
- NanoActive Film s.r.l; Fisciano Italy
- Department of Chemistry and Biology and INSTM Research Unit; University of Salerno, Via Giovanni Paolo II 132; Fisciano Salerno 84084 Italy
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6
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Molecular dynamics simulations of structural transitions of crystalline polystyrene in response to external stresses and temperatures. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.09.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kim SJ, Raut P, Jana SC, Chase G. Electrostatically Active Polymer Hybrid Aerogels for Airborne Nanoparticle Filtration. ACS APPLIED MATERIALS & INTERFACES 2017; 9:6401-6410. [PMID: 28177211 DOI: 10.1021/acsami.6b14784] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The role of electrostatic force on separation of airborne nanoparticles is evaluated in this work by considering a hybrid monolithic aerogel of syndiotactic polystyrene (sPS) and polyvinylidene fluoride (PVDF). The sPS part accounts for open pore structures in the monolith, while the PVDF chains contribute spontaneous polarity for particle capture by the electrostatic force. The hybrid aerogels are fabricated by thermoreversible gelation of sPS from a solution with PVDF in tetrahydrofuran followed by supercritical drying of the gel. sPS is present as the δ-form clathrate crystalline phase and PVDF as α- and γ-form crystalline phases in the hybrid. The presence of PVDF induces significant static charges on the surfaces of hybrid aerogels. The filtration efficiency is determined by passing airborne NaCl nanoparticles with diameter in the range 25-150 nm through the filter media. The experimental data reveal that air permeability of the hybrid system (∼10-10 m2) is close to that of sPS monoliths. The hybrid materials show filtration efficiency ≥99.999% in comparison to 98.889% observed for a sPS monolith with the same solid content.
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Affiliation(s)
- Sung Jun Kim
- Department of Polymer Engineering and ‡Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325-0301, United States
| | - Prasad Raut
- Department of Polymer Engineering and ‡Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325-0301, United States
| | - Sadhan C Jana
- Department of Polymer Engineering and ‡Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325-0301, United States
| | - George Chase
- Department of Polymer Engineering and ‡Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325-0301, United States
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Kim SJ, Chase G, Jana SC. The role of mesopores in achieving high efficiency airborne nanoparticle filtration using aerogel monoliths. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.04.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kim SJ, Chase G, Jana SC. Polymer aerogels for efficient removal of airborne nanoparticles. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.11.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Shaiju P, Bhoje Gowd E. Factors controlling the structure of syndiotactic polystyrene upon the guest exchange and guest extraction processes. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.11.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Trejos VM, Becerra M, Figueroa-Gerstenmaier S, Gil-Villegas A. Theoretical modelling of adsorption of hydrogen onto graphene, MOFs and other carbon-based substrates. Mol Phys 2014. [DOI: 10.1080/00268976.2014.903591] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Tamai Y. Rearrangement of Nanoporous Cavity Structures in Crystalline Syndiotactic Polystyrene Associated with Stress-Induced Phase Transition. ACS Macro Lett 2013; 2:834-838. [PMID: 35606990 DOI: 10.1021/mz400386z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This work demonstrates the possibility of rearranging nanoporous cavity structures in crystalline syndiotactic polystyrene (s-PS) by applying external stresses. A molecular dynamics (MD) simulation was performed for the s-PS crystal with increasing or decreasing of each stress tensor component, starting from the nanoporous ε form. Upon uniaxial compression along the b-axis, the ε form was transformed into a lower density porous form, accompanied by significant elongation of the a-axis. The new form, named the S-I form, was stable only under the stress and was transformed into the γ form after release of the stress. The cavity structure was drastically changed by the transition. The straight cylindrical channels in the ε form, which may be used for the separation of organic solvents, were rearranged to narrower zigzag channels in the S-I form, which is suitable for the precise separation of gases. The molecular cavities disappeared after release of the stress, associated with the transition to the γ form.
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Affiliation(s)
- Yoshinori Tamai
- Department of Applied Physics, Graduate
School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
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Wang X, Jana SC. Synergistic hybrid organic-inorganic aerogels. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6423-6429. [PMID: 23773123 DOI: 10.1021/am401717s] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A class of inorganic-organic hybrid mesoporous aerogel structure was synthesized by growing gel in a gel. In Type 1, silica gels were grown inside the macropores of thermoreversible syndiotactic polystyrene (sPS) gel, while Type 2 hybrid aerogels were obtained by thermoreversible gelation of sPS chains in the mesopores of preformed silica gel. The hybrid gels were converted into aerogels by exchanging the solvent with liquid carbon dioxide followed by supercritical drying. The hybrid aerogels presented cocontinuous networks of pearl-necklace silica particles and crystalline strands of sPS and exhibited the "petal effect" due to the presence of superhydrophobic sPS and hygroscopic silica. The compressive modulus and compressive strain show large enhancements over sPS and silica aerogels indicating synergy, although Type 1 hybrid aerogels were found to be more robust. The hybrid aerogels showed fast absorption and high absorption capacity for a representative hydrocarbon liquid.
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Affiliation(s)
- Xiao Wang
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
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Daniel C, Longo S, Ricciardi R, Reverchon E, Guerra G. Monolithic Nanoporous Crystalline Aerogels. Macromol Rapid Commun 2013; 34:1194-207. [DOI: 10.1002/marc.201300260] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 03/28/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Christophe Daniel
- Department of Chemistry and Biology and INSTM Research Units; Università degli Studi di Salerno, via Ponte Don Melillo; 84084 Fisciano SA Italy
| | - Simona Longo
- Department of Chemistry and Biology and INSTM Research Units; Università degli Studi di Salerno, via Ponte Don Melillo; 84084 Fisciano SA Italy
| | - Rosa Ricciardi
- Department of Chemistry and Biology and INSTM Research Units; Università degli Studi di Salerno, via Ponte Don Melillo; 84084 Fisciano SA Italy
| | - Ernesto Reverchon
- Department of Industrial Engineering; Università degli Studi di Salerno; via Ponte Don Melillo 84084 Fisciano SA Italy
| | - Gaetano Guerra
- Department of Chemistry and Biology and INSTM Research Units; Università degli Studi di Salerno, via Ponte Don Melillo; 84084 Fisciano SA Italy
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Wang X, Jana SC. Tailoring of morphology and surface properties of syndiotactic polystyrene aerogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5589-5598. [PMID: 23573990 DOI: 10.1021/la400492m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study evaluates a method for rendering syndiotactic polystyrene (sPS) aerogels hydrophilic using polyethylene oxide (PEO) of different molecular weights. The highly porous sPS aerogels are inherently hydrophobic although applications involving absorption of moisture and removal of particulate solids may benefit from the high surface area of sPS aerogels provided some degree of hydrophilicity is induced in these materials. In this work, sPS gels are prepared by thermo-reversible gelation in tetrahydrofuran in the presence of PEO. The gels are dried under supercritical conditions to obtain aerogels. The aerogels are characterized by scanning electron microscopy, nitrogen-adsorption porosimetry, helium pycnometry, and contact angle measurements. The data reveal that the pore structures and surface energy can be controlled by varying the concentration and molecular weight of PEO and using different cooling rates during thermo-reversible gelation. In the first case, sPS aerogels, aerogels containing PEO of a low molecular weight or low concentration show superhydrophobic surface presenting the "lotus effect". In the second case, PEO at a higher concentration or with higher molecular weight forms phase-separated domains yielding new hydrophilic macropores (>10 μm) in the aerogel structures. These macropores contribute to the superhydrophobic surface with the "petal effect". The cooling rate during gelation shows a strong influence on these two cases.
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Affiliation(s)
- Xiao Wang
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
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Shearer GC, Colombo V, Chavan S, Albanese E, Civalleri B, Maspero A, Bordiga S. Stability vs. reactivity: understanding the adsorption properties of Ni3(BTP)2 by experimental and computational methods. Dalton Trans 2013; 42:6450-8. [DOI: 10.1039/c3dt32944e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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18
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Guerra G, Daniel C, Rizzo P, Tarallo O. Advanced materials based on polymer cocrystalline forms. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/polb.23035] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chavan S, Vitillo JG, Gianolio D, Zavorotynska O, Civalleri B, Jakobsen S, Nilsen MH, Valenzano L, Lamberti C, Lillerud KP, Bordiga S. H2storage in isostructural UiO-67 and UiO-66 MOFs. Phys Chem Chem Phys 2012; 14:1614-26. [PMID: 22187720 DOI: 10.1039/c1cp23434j] [Citation(s) in RCA: 248] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sachin Chavan
- Department of Inorganic, Physical and Material Chemistry, and INSTM Reference Center, University of Turin, Via P. Giuria 7, I-10125 Torino, Italy
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Lamberti C, Zecchina A, Groppo E, Bordiga S. Probing the surfaces of heterogeneous catalysts by in situ IR spectroscopy. Chem Soc Rev 2010; 39:4951-5001. [PMID: 21038053 DOI: 10.1039/c0cs00117a] [Citation(s) in RCA: 358] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This critical review describes the reactivity of heterogeneous catalysts from the point of view of four simple, but essential for Chemistry, molecules (namely dihydrogen, carbon monoxide, nitrogen monoxide and ethylene) that are considered as probes or as reactants in combination with "in situ" controlled temperature and pressure Infrared spectroscopy. The fundamental properties of H(2), CO, NO and C(2)H(4) are shortly described in order to justify their different behaviour in respect of isolated sites in different environments, extended surfaces, clusters, crystalline or amorphous materials. The description is given by considering some "key studies" and trying to evidence similarities and differences among surfaces and probes (572 references).
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Affiliation(s)
- Carlo Lamberti
- Department of Inorganic, Physical and Materials Chemistry, NIS Centre of Excellence, University of Turin. Via P. Giuria 7, 10125 Torino, Italy
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Figueroa-Gerstenmaier S, Daniel C, Milano G, Vitillo JG, Zavorotynska O, Spoto G, Guerra G. Hydrogen Adsorption by δ and ε Crystalline Phases of Syndiotactic Polystyrene Aerogels. Macromolecules 2010. [DOI: 10.1021/ma101218q] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Susana Figueroa-Gerstenmaier
- División de Ciencias e Ingenierías, Campus León, Universidad de Guanajuato, Loma del Bosque 103, León (Gto.) 37150, Mexico
| | - Christophe Daniel
- Dipartimento di Chimica, NANOMATES and INSTM Research Unit, Università di Salerno, Fisciano (SA) 84084, Italy
| | - Giuseppe Milano
- Dipartimento di Chimica, NANOMATES and INSTM Research Unit, Università di Salerno, Fisciano (SA) 84084, Italy
| | - Jenny G. Vitillo
- Dipartimento di Chimica IFM and NIS Centre of Excellence, Università di Torino, Via Giuria 7, Torino 10125, Italy
| | - Olena Zavorotynska
- Dipartimento di Chimica IFM and NIS Centre of Excellence, Università di Torino, Via Giuria 7, Torino 10125, Italy
| | - Giuseppe Spoto
- Dipartimento di Chimica IFM and NIS Centre of Excellence, Università di Torino, Via Giuria 7, Torino 10125, Italy
| | - Gaetano Guerra
- Dipartimento di Chimica, NANOMATES and INSTM Research Unit, Università di Salerno, Fisciano (SA) 84084, Italy
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