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Boventi M, Mauri M, Golker K, Wiklander JG, Nicholls IA, Simonutti R. Porosity of Molecularly Imprinted Polymers Investigated by 129Xe NMR Spectroscopy. ACS APPLIED POLYMER MATERIALS 2022; 4:8740-8749. [PMID: 36532888 PMCID: PMC9745730 DOI: 10.1021/acsapm.2c01084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 10/24/2022] [Indexed: 06/17/2023]
Abstract
Molecularly imprinted polymers (MIPs) display intriguing recognition properties and can be used as sensor recognition elements or in separation. In this work, we investigated the formation of hierarchical porosity of compositionally varied MIPs using 129Xe Nuclear Magnetic Resonance (NMR) and 1H Time Domain Nuclear Magnetic Resonance (TD-NMR). Variable temperature 129Xe NMR established the morphological variation with respect to the degree of cross-linking, supported by 1H TD-NMR determination of polymer chain mobility. Together, the results indicate that a high degree of cross-linking stabilizes the porous structure: highly cross-linked samples display a significant amount of accessible mesopores that instead collapse in less structured polymers. No significant differences can be detected due to the presence of templated pores in molecularly imprinted polymers: in the dry state, these specific shapes are too small to accommodate xenon atoms, which, instead, probe higher levels in the porous structure, allowing their study in detail. Additional resonances at a high chemical shift are detected in the 129Xe NMR spectra. Even though their chemical shifts are compatible with xenon dissolved in bulk polymers, variable temperature experiments rule out this possibility. The combination of 129Xe and TD-NMR data allows attribution of these resonances to softer superficial regions probed by xenon in the NMR time scale. This can contribute to the understanding of the surface dynamics of polymers.
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Affiliation(s)
- Matteo Boventi
- Department
of Materials Science, Università
degli Studi di Milano-Bicocca, Via R. Cozzi 55, 20125, Milano, Italy
| | - Michele Mauri
- Department
of Materials Science, Università
degli Studi di Milano-Bicocca, Via R. Cozzi 55, 20125, Milano, Italy
| | - Kerstin Golker
- Linnaeus
University Centre for Biomaterials Chemistry, Bioorganic and Biophysical
Chemistry Laboratory, Department of Chemistry and Biomedical Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden
| | - Jesper G. Wiklander
- Linnaeus
University Centre for Biomaterials Chemistry, Bioorganic and Biophysical
Chemistry Laboratory, Department of Chemistry and Biomedical Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden
| | - Ian A. Nicholls
- Linnaeus
University Centre for Biomaterials Chemistry, Bioorganic and Biophysical
Chemistry Laboratory, Department of Chemistry and Biomedical Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden
| | - Roberto Simonutti
- Department
of Materials Science, Università
degli Studi di Milano-Bicocca, Via R. Cozzi 55, 20125, Milano, Italy
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2
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Boventi M, Mauri M, Alexander F, James SL, Simonutti R, Castiglione F. Exploring cavities in Type II Porous Liquids with Xenon. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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3
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Abstract
Porous materials are ubiquitous systems with a large variety of applications from catalysis to polymer science, from soil to life science, from separation to building materials. Many relevant systems of biological or synthetic origin exhibit a hierarchy, defined as spatial organization over several length scales. Their characterization is often elusive, since many techniques can only be employed to probe a single length scale, like the nanometric or the micrometric levels. Moreover, some multiscale systems lack tridimensional order, further reducing the possibilities of investigation. 129Xe nuclear magnetic resonance (NMR) provides a unique and comprehensive description of multiscale porous materials by exploiting the adsorption and diffusion of xenon atoms. NMR parameters like chemical shift, relaxation times, and diffusion coefficient allow the probing of structures from a few angstroms to microns at the same time. Xenon can evaluate the size and shape of a variety of accessible volumes such as pores, layers, and tunnels, and the chemical nature of their surface. The dynamic nature of the probe provides a simultaneous exploration of different scales, informing on complex features such as the relative accessibility of different populations of pores. In this review, the basic principles of this technique will be presented along with some selected applications, focusing on its ability to characterize multiscale materials.
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4
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Martins LF, Palace Carvalho AJ, Morgado P, Filipe EJ. Solubility of xenon in liquid n-alkanes and cycloalkanes by computer simulation. Towards the perfect anaesthetic. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Galiano F, Mancuso R, Guazzelli L, Mauri M, Chiappe C, Simonutti R, Brunetti A, Pomelli CS, Barbieri G, Gabriele B, Figoli A. Phosphonium ionic liquid-polyacrylate copolymer membranes for improved CO2 separations. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119479] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Morgado P, Barras J, Galindo A, Jackson G, Filipe EJM. Solubility of water in mixtures of ( n-alkanes + n-perfluoroalkanes) and in n-perfluoroalkylalkanes: experiments and modelling with the SAFT- γ Mie group-contribution approach. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1910743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Pedro Morgado
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - João Barras
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London, UK
| | - Amparo Galindo
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London, UK
| | - George Jackson
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, South Kensington Campus, London, UK
| | - Eduardo J. M. Filipe
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
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7
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Saielli G, Castiglione F, Mauri M, Simonutti R, Mele A. Xenon Diffusion in Ionic Liquids with Blurred Nanodomain Separation. Chemphyschem 2021; 22:1880-1890. [PMID: 34251740 DOI: 10.1002/cphc.202100423] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/11/2021] [Indexed: 11/09/2022]
Abstract
The dynamics of xenon gas, loaded in a series of 1-alkyl-3-methylimidazolium based ionic liquids, probes the formation of increasingly blurred polar/apolar nanodomains as a function of the anion type and the cation chain length. Exploiting 129 Xe NMR spectroscopy techniques, like Pulse Gradient Spin Echo (PGSE) and inversion recovery (IR), the diffusion motion and relaxation times are determined for 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [Cn C1 im][TFSI]. A correlation between the ILs nano-structure and both xenon diffusivity and relaxation times, as well as chemical shifts, is outlined. Interestingly, comparison with previous results of the same properties in the homologous imidazolium chlorides and hexafluorophospate shows an opposite trend with the alkyl chain length. Classical molecular dynamics (MD) simulations are used to calculate the xenon and cation and anion diffusion coefficients in the same systems, including imidazolium cations with longer chains (n=4, 6, 8 … 20). An almost quantitative agreement with the experiments validates the MD simulations and, at the same time, provides the necessary structural and dynamic microscopic insights on the nano-segregation and diffusion of xenon in bistriflimide, chloride and hexafluorphosphate salts allowing to observe and rationalize the shaping effect of the cation in the nanostructure.
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Affiliation(s)
- Giacomo Saielli
- CNR - ITM Institute on Membrane Technology, Padova Unit, Via Marzolo, 1, 35131, Padova, Italy.,Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131, Padova, Italy
| | - Franca Castiglione
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. Da Vinci, 32, 20133, Milano, Italy
| | - Michele Mauri
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Roberto Cozzi, 53, 20125, Milano, Italy
| | - Roberto Simonutti
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Roberto Cozzi, 53, 20125, Milano, Italy
| | - Andrea Mele
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. Da Vinci, 32, 20133, Milano, Italy.,CNR - SCITEC Istituto di Scienze e Tecnologie Chimiche, Via A. Corti 12, 20133, Milano, Italy
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Silva P, Nova D, Teixeira M, Cardoso V, Morgado P, Nunes B, Colaço R, Fauré MC, Fontaine P, Goldmann M, Filipe EJM. Langmuir Films of Perfluorinated Fatty Alcohols: Evidence of Spontaneous Formation of Solid Aggregates at Zero Surface Pressure and Very Low Surface Density. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2257. [PMID: 33202626 PMCID: PMC7697836 DOI: 10.3390/nano10112257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 12/17/2022]
Abstract
In this work, Langmuir films of two highly fluorinated fatty alcohols, CF3(CF2)12CH2OH (F14OH) and CF3(CF2)16CH2OH (F18OH), were studied. Atomic Force Microscopy (AFM) images of the films transferred at zero surface pressure and low surface density onto the surface of silicon wafers by the Langmuir-Blodgett technique revealed, for the first time, the existence of solid-like domains with well-defined mostly hexagonal (starry) shapes in the case of F18OH, and with an entangled structure of threads in the case of F14OH. A (20:80) molar mixture of the two alcohols displayed a surprising combination of the two patterns: hexagonal domains surrounded by zigzagging threads, clearly demonstrating that the two alcohols segregate during the 2D crystallization process. Grazing Incidence X-Ray Diffraction (GIXD) measurements confirmed that the molecules of both alcohols organize in 2D hexagonal lattices. Atomistic Molecular Dynamics (MD) simulations provide a visualization of the structure of the domains and allow a molecular-level interpretation of the experimental observations. The simulation results clearly showed that perfluorinated alcohols have an intrinsic tendency to aggregate, even at very low surface density. The formed domains are highly organized compared to those of hydrogenated alcohols with similar chain length. Very probably, this tendency is a consequence of the characteristic stiffness of the perfluorinated chains. The diffraction spectrum calculated from the simulation trajectories compares favorably with the experimental spectra, fully validating the simulations and the proposed interpretation. The present results highlight for the first time an inherent tendency of perfluorinated chains to aggregate, even at very low surface density, forming highly organized 2D structures. We believe these findings are important to fully understand related phenomena, such as the formation of hemi-micelles of semifluorinated alkanes at the surface of water and the 2D segregation in mixed Langmuir films of hydrogenated and fluorinated fatty acids.
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Affiliation(s)
- Pedro Silva
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
- Institut des NanoSciences de Paris, UMR 7588 CNRS Sorbonne Université, 4 Place Jussieu, 75252 Paris CEDEX 05, France; (M.-C.F.); (M.G.)
| | - Duarte Nova
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
| | - Miguel Teixeira
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
| | - Vitória Cardoso
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP48 91192 Gif sur Yvette CEDEX, France;
| | - Pedro Morgado
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
| | - Bruno Nunes
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
| | - Rogério Colaço
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
| | - Marie-Claude Fauré
- Institut des NanoSciences de Paris, UMR 7588 CNRS Sorbonne Université, 4 Place Jussieu, 75252 Paris CEDEX 05, France; (M.-C.F.); (M.G.)
- Faculté des Sciences Fondamentales et Biomédicales, Université de Paris, 45 rue des Saints-Pères, 75006 Paris, France
| | - Philippe Fontaine
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP48 91192 Gif sur Yvette CEDEX, France;
| | - Michel Goldmann
- Institut des NanoSciences de Paris, UMR 7588 CNRS Sorbonne Université, 4 Place Jussieu, 75252 Paris CEDEX 05, France; (M.-C.F.); (M.G.)
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP48 91192 Gif sur Yvette CEDEX, France;
- Faculté des Sciences Fondamentales et Biomédicales, Université de Paris, 45 rue des Saints-Pères, 75006 Paris, France
| | - Eduardo J. M. Filipe
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (P.S.); (D.N.); (M.T.); (V.C.); (P.M.); (B.N.); (R.C.)
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9
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Morgado P, Barras J, Filipe EJM. From nano-seggregation to mesophases: probing the liquid structure of perfluoroalkylalkanes with 129Xe NMR spectroscopy. Phys Chem Chem Phys 2020; 22:14736-14747. [PMID: 32578615 DOI: 10.1039/d0cp02123g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we demonstrate that pure perfluoroalkylalkane diblock molecules are not isotropic liquids and self organize forming domains at the nanometric scale. 129Xe NMR spectra were obtained as a function of temperature for seven liquid perfluoroalkylalkanes, covering a range of relative lengths of the hydrogenated and fluorinated segments. The results support the presence of domains richer in the hydrogenated groups, in which xenon is preferentially dissolved. The average local concentration within the xenon coordination sphere is estimated to be 0.05 mole fraction higher in hydrogenated groups than the stoichiometric proportion. Atomistic molecular dynamics simulations support this analysis and allow a detailed analysis of the liquid structure. Furthermore, 129Xe NMR spectra in perfluorohexylhexane (F6H6) and perfluorohexyloctane (F6H8) obtained as a function of temperature, clearly detect the existence of two distinct environments in the fluid, one richer in hydrogenated groups and another richer in fluorinated groups, consistent with the formation of mesophases. It is important to stress that nano-segregation is this case observed in liquids interacting exclusively through dispersion forces, unlike most common examples of segregation which are determined by hydrogen bonding and polarity. Given the simple molecular structure and interactions of the studied PFAA, we believe that the present results can have a general impact in understanding the early mechanisms of segregation, phase separation and self-assembly.
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Affiliation(s)
- Pedro Morgado
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - João Barras
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - Eduardo J M Filipe
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
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10
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Weber CC, Brooks NJ, Castiglione F, Mauri M, Simonutti R, Mele A, Welton T. On the structural origin of free volume in 1-alkyl-3-methylimidazolium ionic liquid mixtures: a SAXS and 129Xe NMR study. Phys Chem Chem Phys 2019; 21:5999-6010. [PMID: 30809621 DOI: 10.1039/c9cp00587k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionic liquid (IL) mixtures enable the design of fluids with finely tuned structural and physicochemical properties for myriad applications. In order to rationally develop and design IL mixtures with the desired properties, a thorough understanding of the structural origins of their physicochemical properties and the thermodynamics of mixing needs to be developed. To elucidate the structural origins of the excess molar volume within IL mixtures containing ions with different alkyl chain lengths, 3 IL mixtures containing 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ILs have been explored in a joint small angle X-ray scattering (SAXS) and 129Xe NMR study. The apolar domains of the IL mixtures were shown to possess similar dimensions to the largest alkyl chain of the mixture with the size evolution determined by whether the shorter alkyl chain was able to interact with the apolar domain. 129Xe NMR results illustrated that the origin of excess molar volume in these mixtures was due to fluctuations within these apolar domains arising from alkyl chain mismatch, with the formation of a greater number of smaller voids within the IL structure. These results indicate that free volume effects for these types of mixtures can be predicted from simple considerations of IL structure and that the structural basis for the formation of excess molar volume in these mixtures is substantially different to IL mixtures formed of different types of ions.
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Affiliation(s)
- Cameron C Weber
- School of Science, Auckland University of Technology, Auckland, New Zealand
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11
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Morgado P, Martins LFG, Filipe EJM. From nano-emulsions to phase separation: evidence of nano-segregation in (alkane + perfluoroalkane) mixtures using 129Xe NMR Spectroscopy. Phys Chem Chem Phys 2019; 21:3742-3751. [PMID: 30698173 DOI: 10.1039/c8cp06509h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we demonstrate that mixtures of (hexane + perfluorohexane) above the upper critical solution temperature segregate by forming domains at the nanometric scale. 129Xe NMR spectra obtained for solutions of xenon in liquid mixtures of (hexane + perfluorohexane) as a function of temperature suggest the existence of domains richer in the hydrogenated component, in which xenon "prefers" to be solvated. The average local concentration within the xenon coordination sphere is at least 0.05 higher in hexane mole fraction than the nominal concentration of the mixture. Atomistic molecular dynamics simulations support this analysis in excellent agreement with the experimental data. Additionally, 129Xe NMR spectra in pure perfluoroalkanes allow a detailed analysis of the liquid structure, continuing that previously reported for the liquid alkanes. It should be emphasised that nano-segregation is here observed in fluids governed exclusively by dispersion interactions, in contrast to other examples in which hydrogen bonding and polarity play important roles. Given its simplicity, this case study is thus prone to have a general impact in understanding the early mechanisms of segregation, phase separation and self-assembly.
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Affiliation(s)
- Pedro Morgado
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
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12
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Li K, Jiang G, Zhou F, Li L, Zhang Z, Hu Z, Zhou N, Zhu X. Impact of cyclic topology: odd–even glass transition temperatures and fluorescence quantum yields in molecularly-defined macrocycles. Polym Chem 2017. [DOI: 10.1039/c7py00037e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The topological structure of cyclic-TPEn+1 (n = 1–6) induces odd–even effects on the Tg and AIE behavior, arising from the alternation of intermolecular interactions.
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Affiliation(s)
- Kun Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Ganquan Jiang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Feng Zhou
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Lishan Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Zhengbiao Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Zhijun Hu
- Center for Soft Condensed Matter Physics and Interdisciplinary Research
- College of Physics
- Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou 215006
| | - Nianchen Zhou
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Xiulin Zhu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
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13
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Shen W, Liu H, Ling-Hu Y, Wang H, Cheng Y. Enhanced siRNA delivery of a cyclododecylated dendrimer compared to its linear derivative. J Mater Chem B 2016; 4:5654-5658. [DOI: 10.1039/c6tb01218c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lipid modification has been widely applied to improve the gene delivery efficacy of cationic polymers.
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Affiliation(s)
- Wanwan Shen
- Shanghai Key Laboratory of Regulatory Biology
- School of Life Sciences
- East China Normal University
- Shanghai
- P. R. China
| | - Hongmei Liu
- Shanghai Key Laboratory of Regulatory Biology
- School of Life Sciences
- East China Normal University
- Shanghai
- P. R. China
| | - Ye Ling-Hu
- Shanghai Key Laboratory of Regulatory Biology
- School of Life Sciences
- East China Normal University
- Shanghai
- P. R. China
| | - Hui Wang
- Shanghai Key Laboratory of Regulatory Biology
- School of Life Sciences
- East China Normal University
- Shanghai
- P. R. China
| | - Yiyun Cheng
- Shanghai Key Laboratory of Regulatory Biology
- School of Life Sciences
- East China Normal University
- Shanghai
- P. R. China
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14
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Lima CFRAC, Costa JCS, Melo A, Tavares HR, Silva AMS, Santos LMNBF. Effect of Self-Association on the Phase Stability of Triphenylamine Derivatives. J Phys Chem A 2015; 119:6676-82. [DOI: 10.1021/acs.jpca.5b01079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carlos F. R. A. C. Lima
- CIQ,
Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências da Universidade do Porto, P-4169-007 Porto, Portugal
- Department of Chemistry & QOPNA, University of Aveiro, P-3810-193 Aveiro, Portugal
| | - José C. S. Costa
- CIQ,
Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências da Universidade do Porto, P-4169-007 Porto, Portugal
| | - André Melo
- LAQV-REQUIMTE, Departamento de Quı́mica
e Bioquı́mica, Faculdade de Ciências
da Universidade do Porto, P-4169-007 Porto, Portugal
| | - Hilário R. Tavares
- Department of Chemistry & QOPNA, University of Aveiro, P-3810-193 Aveiro, Portugal
| | - Artur M. S. Silva
- Department of Chemistry & QOPNA, University of Aveiro, P-3810-193 Aveiro, Portugal
| | - Luı́s M. N. B. F. Santos
- CIQ,
Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências da Universidade do Porto, P-4169-007 Porto, Portugal
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15
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Lima CFRAC, Costa JCS, Galvão TLP, Tavares HR, Silva AMS, Santos LMNBF. Self-association of oligothiophenes in isotropic systems. Phys Chem Chem Phys 2014; 16:14761-70. [DOI: 10.1039/c4cp01101e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-association of oligothiophenes increases the liquid stability thus leading to lower melting temperatures.
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Affiliation(s)
- Carlos F. R. A. C. Lima
- CIQ
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- P-4169-007 Porto, Portugal
- QOPNA
| | - José C. S. Costa
- CIQ
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- P-4169-007 Porto, Portugal
| | - Tiago L. P. Galvão
- CIQ
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- P-4169-007 Porto, Portugal
| | - Hilário R. Tavares
- QOPNA
- Department of Chemistry
- University of Aveiro
- P-3810-193 Aveiro, Portugal
| | - Artur M. S. Silva
- QOPNA
- Department of Chemistry
- University of Aveiro
- P-3810-193 Aveiro, Portugal
| | - Luís M. N. B. F. Santos
- CIQ
- Departamento de Química e Bioquímica
- Faculdade de Ciências da Universidade do Porto
- P-4169-007 Porto, Portugal
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