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Jones BE, Blayo C, Greenfield JL, Fuchter MJ, Cowieson N, Evans RC. Understanding X-ray-induced isomerisation in photoswitchable surfactant assemblies. Beilstein J Org Chem 2024; 20:2005-2015. [PMID: 39161710 PMCID: PMC11331535 DOI: 10.3762/bjoc.20.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 07/17/2024] [Indexed: 08/21/2024] Open
Abstract
Dynamic, responsive materials can be built using photosurfactants (PS) that self-assemble into ordered nanostructures, such as micelles or liquid crystals. These PS contain photoswitchable groups, such as azobenzene (Azo) or, more recently, arylazopyrazoles (AAPs), which change shape and polarity on photoisomerisation between the E and Z states, thus changing the self-assembled structure. Small-angle X-ray scattering (SAXS) is a powerful technique to probe the morphology of PS and can be used to measure the mechanisms of structural changes using in-situ light irradiation with rapid, time-resolved data collection. However, X-ray irradiation has been shown previously to induce Z-to-E isomerisation of Azo-PS, which can lead to inaccuracies in the measured photostationary state. Here, we investigate the effect of light and X-ray irradiation on micelles formed from two different PS, containing either an Azo or AAP photoswitch using SAXS with in-situ light irradiation. The effect of X-ray irradiation on the Z isomer is shown to depend on the photoswitch, solvent, concentration and morphology. We use this to create guidelines for future X-ray experiments using photoswitchable molecules, which can aid more accurate understanding of these materials for application in solar energy storage, catalysis or controlled drug delivery.
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Affiliation(s)
- Beatrice E Jones
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, CB3 0FS, United Kingdom
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
| | - Camille Blayo
- School of Chemistry, Trinity College Dublin, University of Dublin, College Green, Dublin 2, Ireland
| | - Jake L Greenfield
- Department of Chemistry, Molecular Sciences Research Hub, White City Campus, Imperial College London, 82 Wood Lane, London, W12 7SL, United Kingdom
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Matthew J Fuchter
- Department of Chemistry, Molecular Sciences Research Hub, White City Campus, Imperial College London, 82 Wood Lane, London, W12 7SL, United Kingdom
| | - Nathan Cowieson
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
| | - Rachel C Evans
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, CB3 0FS, United Kingdom
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Jones BE, Fitzpatrick A, Fowell K, Edwards-Gayle CJC, Khunti N, Inoue K, Daniels S, Williams E, Blayo C, Evans RC, Cowieson N. Developing an in situ LED irradiation system for small-angle X-ray scattering at B21, Diamond Light Source. JOURNAL OF SYNCHROTRON RADIATION 2024; 31:763-770. [PMID: 38819843 PMCID: PMC11226168 DOI: 10.1107/s1600577524003205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 04/13/2024] [Indexed: 06/01/2024]
Abstract
Beamline B21 at the Diamond Light Source synchrotron in the UK is a small-angle X-ray scattering (SAXS) beamline that specializes in high-throughput measurements via automated sample delivery systems. A system has been developed whereby a sample can be illuminated by a focused beam of light coincident with the X-ray beam. The system is compatible with the highly automated sample delivery system at the beamline and allows a beamline user to select a light source from a broad range of wavelengths across the UV and visible spectrum and to control the timing and duration of the light pulse with respect to the X-ray exposure of the SAXS measurement. The intensity of the light source has been characterized across the wavelength range enabling experiments where a quantitative measure of dose is important. Finally, the utility of the system is demonstrated via measurement of several light-responsive samples.
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Affiliation(s)
- Beatrice E. Jones
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
- Department of Materials Science and MetallurgyUniversity of Cambridge27 Charles Babbage RoadCambridgeCB3 0FSUnited Kingdom
| | - Ann Fitzpatrick
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
| | - Kieran Fowell
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
| | | | - Nikul Khunti
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
| | - Katsuaki Inoue
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
| | - Steven Daniels
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
| | - Eugene Williams
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
| | - Camille Blayo
- School of ChemistryTrinity College Dublin, University of DublinCollege GreenDublinIreland
| | - Rachel C. Evans
- Department of Materials Science and MetallurgyUniversity of Cambridge27 Charles Babbage RoadCambridgeCB3 0FSUnited Kingdom
| | - Nathan Cowieson
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OxfordshireOX11 0DE, United Kingdom
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Iwase H, Akamatsu M, Inamura Y, Sakaguchi Y, Kobayashi K, Sakai H. Time-Resolved Structural Analysis of Fast-Photoresponsive Surfactant Micelles by Stroboscopic Small-Angle Neutron Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12357-12364. [PMID: 37610076 DOI: 10.1021/acs.langmuir.3c01456] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Photoresponsive materials are garnering attention because of their applications toward building a sustainable society. A recently developed fast-photoresponsive amphiphilic lophine dimer (3TEG-LPD) responds rapidly to light, making it a promising candidate for drug-delivery systems. In this study, the mechanism of structural changes induced by ultraviolet (UV) irradiation in 3TEG-LPD micelles in an aqueous solution was investigated via an in situ time-resolved small-angle neutron scattering (SANS) technique. Since subsecond resolution was necessary to observe the structural changes in the 3TEG-LPD micelles, stroboscopic SANS analysis was employed to obtain scattering profiles with a time width of 0.5 s. The structural parameters were quantitatively determined by performing a model-fitting analysis of the SANS results. The stroboscopic SANS results showed that upon UV irradiation, the axial ratio and pseudo-aggregation number of the 3TEG-LPD micelles increased by 1.8 and 1.6 times, respectively, whereas the number of water molecules per surfactant molecule decreased. This finding suggested that the change in the shape of the micelles from spherical to ellipsoidal shape was accompanied by dehydration. Under the present UV irradiation conditions, this structural change of the micelle occurred rapidly during the first 30 s after the start of UV irradiation. Each structural parameter recovered exponentially and reversibly during the recovery process after the cessation of UV irradiation. The changes in these parameters were analyzed in terms of kinetics by comparing them with the changes in the molecular structure. We found that the change of the micelles proceeds approximately twice as fast as the association of the molecule. Furthermore, from the perspective of the critical packing parameter consideration, the SANS analysis revealed that the UV-induced changes in 3TEG-LPD micelles are dominated by the enthalpy contribution. This finding is expected to be useful for developing new materials for various applications.
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Affiliation(s)
- Hiroki Iwase
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Masaaki Akamatsu
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Department of Chemistry and Biotechnology, Faculty of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8552, Japan
| | - Yasuhiro Inamura
- Materials and Life Science Division, J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Yoshifumi Sakaguchi
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Kazuki Kobayashi
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Hideki Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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Fujii S. Polymeric core-crosslinked particles prepared via a nanoemulsion-mediated process: from particle design and structural characterization to in vivo behavior in chemotherapy. Polym J 2023; 55:1-13. [PMID: 37359987 PMCID: PMC10189226 DOI: 10.1038/s41428-023-00793-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 06/28/2023]
Abstract
Various polymeric nanoparticles have been used as drug carriers in drug delivery systems (DDSs). Most of them were constructed from dynamic self-assembly systems formed via hydrophobic interactions and from structures that are unstable in an in vivo environment owing to their relatively weak formation forces. As a solution to this issue, physically stabilized core-crosslinked particles (CP) with chemically crosslinked cores have received attention as alternatives to the dynamic nanoparticles. This focused review summarizes recent advances in the construction, structural characterization, and in vivo behavior of polymeric CPs. First, we introduce a nanoemulsion-mediated method to create polyethylene glycol (PEG)-bearing CPs and their structural characterization. The relationship between the PEG chain conformations in the particle shell and the in vivo fate of the CPs is also discussed. After that, the development and advantages of zwitterionic amino acid-based polymer (ZAP)-bearing CPs are presented to address the poor penetration and the internalization of PEG-based CPs into tumor tissues and cells, respectively. Finally, we conclude and discuss prospects for application of polymeric CPs in the DDS field.
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Affiliation(s)
- Shota Fujii
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, MA 01003 USA
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Bjørnestad VA, Li X, Tribet C, Lund R, Cascella M. Micelle kinetics of photoswitchable surfactants: Self-assembly pathways and relaxation mechanisms. J Colloid Interface Sci 2023; 646:883-899. [PMID: 37235934 DOI: 10.1016/j.jcis.2023.05.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/19/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
HYPOTHESIS A key question in the kinetics of surfactant self-assembly is whether exchange of unimers or fusion/fission of entire micelles is the dominant pathway. In this study, an isomerizable surfactant is used to explore fundamental out-of-equilibrium kinetics and mechanisms for growth and dissolution of micelles. EXPERIMENTS The kinetics of cationic surfactant 4-butyl-4'-(3-trimethylammoniumpropoxy)-phenylazobenzene was studied using molecular dynamics simulations. The fusion and exchange processes were investigated using umbrella sampling. Equilibrium states were validated by comparison with small-angle X-ray scattering data. The photo-isomerization event was simulated by modifying the torsion potential of the photo-responsive group to emulate the trans-to-cis transition. FINDINGS Micelle growth is dominated by unimer exchange processes, whereas, depending on the conditions, dissolution can occur both through fission and unimer expulsion. Fusion barriers increase steeply with the aggregation number making this an unlikely pathway to equilibrium for micelles of sizes that fit with the experimental data. The barriers for unimer expulsion remain constant and are much lower for unimer insertion, making exchange more likely at high aggregation. When simulating photo-conversion events, both fission and a large degree of unimer expulsion can occur depending on the extent of the out-of-equilibrium stress that is put on the system.
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Affiliation(s)
- Victoria Ariel Bjørnestad
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway
| | - Xinmeng Li
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway
| | - Christophe Tribet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris, 75005, France
| | - Reidar Lund
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway.
| | - Michele Cascella
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway.
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Ledum M, Sen S, Li X, Carrer M, Feng Y, Cascella M, Bore SL. HylleraasMD: A Domain Decomposition-Based Hybrid Particle-Field Software for Multiscale Simulations of Soft Matter. J Chem Theory Comput 2023; 19:2939-2952. [PMID: 37130290 DOI: 10.1021/acs.jctc.3c00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We present HylleraasMD (HyMD), a comprehensive implementation of the recently proposed Hamiltonian formulation of hybrid particle-field molecular dynamics. The methodology is based on a tunable, grid-independent length-scale of coarse graining, obtained by filtering particle densities in reciprocal space. This enables systematic convergence of energies and forces by grid refinement, also eliminating nonphysical force aliasing. Separating the time integration of fast modes associated with internal molecular motion from slow modes associated with their density fields, we enable the first time-reversible, energy-conserving hybrid particle-field simulations. HyMD comprises the optional use of explicit electrostatics, which, in this formalism, corresponds to the long-range potential in particle-mesh Ewald. We demonstrate the ability of HyMD to perform simulations in the microcanonical and canonical ensembles with a series of test cases, comprising lipid bilayers and vesicles, surfactant micelles, and polypeptide chains, comparing our results to established literature. An on-the-fly increase of the characteristic coarse-grain length significantly speeds up dynamics, accelerating self-diffusion and leading to expedited aggregation. Exploiting this acceleration, we find that the time scales involved in the self-assembly of polymeric structures can lie in the tens to hundreds of picoseconds instead of the multimicrosecond regime observed with comparable coarse-grained models.
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Affiliation(s)
- Morten Ledum
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, PO Box 1033 Blindern, 0315 Oslo, Norway
| | - Samiran Sen
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, PO Box 1033 Blindern, 0315 Oslo, Norway
| | - Xinmeng Li
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, PO Box 1033 Blindern, 0315 Oslo, Norway
| | - Manuel Carrer
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, PO Box 1033 Blindern, 0315 Oslo, Norway
| | - Yu Feng
- Berkeley Center for Cosmological Physics and Department of Physics, University of California, Berkeley, California 94720, United States
| | - Michele Cascella
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, PO Box 1033 Blindern, 0315 Oslo, Norway
| | - Sigbjørn Løland Bore
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
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7
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Guo Z, Bai G, Zhao W, Yang L, Du T, Zhuo K, Wang J, Wang Y. Activation and Inhibition of Isomerization of a Cationic Azobenzene Surfactant in the Large Void Space of Polyglycerol Dendron Micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:4015-4025. [PMID: 36897316 DOI: 10.1021/acs.langmuir.2c03373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Owing to the unique geometric structure of dendritic amphiphiles with voluminous dendrons, their micelles can harbor a large void space, which provides a new research focus and approach for micellar functionalization. In this work, we used the void space to construct a UV responsive micelle system of the mixed dendritic amphiphile (C12-(G3)2) and cationic azobenzene surfactant (C4AzoTAB). The synthesized C12-(G3)2 that possesses double third generation polyglycerol (PG) dendrons and a single alkyl chain is expected to highlight the large void space within the inside of the micelles. Thus, the aims of this work are to achieve the isomerization of C4AzoTAB in situ and to deeply understand the intermolecular interaction in the mixed micelles. The effect of the large void room with a wall decorated with the ether oxygen atoms on the isomerization of C4AzoTAB was studied by isomerization kinetics, conductivity measurements, isothermal titration calorimetry (ITC), and 1H NMR and 2D NOESY spectroscopies. The isomerization behavior of C4AzoTAB in C12-(G3)2 micelles was presented in terms of its kinetic constant, counterionic association, interaction enthalpy, and position and orientation of C4AzoTAB. The results of NMR and conductivity show that the quaternary ammonium group of C4AzoTAB situates on the surface of the mixed micelles with C12-(G3)2 both before and after UV-irradiation, while the position of azobenzene group in C12-(G3)2 micelles depends on its conformation. The C12-(G3)2 micelles can inhibit the UV response of the trans-isomer and activate the thermal relaxation of the cis-isomer, which has a potential application in the field of light-controlled smart nanocarriers.
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Affiliation(s)
- Zhijun Guo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Guangyue Bai
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Wenqi Zhao
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Ling Yang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Tingru Du
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Kelei Zhuo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Jianji Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Yujie Wang
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan 453003, P. R. China
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Sharma A, Mittal P, Yadav A, Mishra AK, Hazari PP, Sharma RK. Sustained Activity of Stimuli-Responsive Curcumin and Acemannan Based Hydrogel Patches in Wound Healing. ACS APPLIED BIO MATERIALS 2022; 5:598-609. [PMID: 35089010 DOI: 10.1021/acsabm.1c01078] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Natural plant extract, namely acemannan (Ac) and curcumin (Cur), coencapsulated pluronic micelles, showing thermoresponsive properties, were designed for efficient and safe in vivo wound healing applications. Ac and Cur, widely used antimicrobials, find limited applications because of their low stability, short biological half-life, poor solubility, and low bioavailability. Herein, we report the extraction of Ac from aloe vera and coencapsulation of it with Cur in pluronic micelles to take advantage of the combined effects of both components. Both Ac and Cur preserved their bioactive functionality upon encapsulation. Single photon emission computed tomography imaging confirmed that NPAcC2 hydrogel masked the whole wound by forming a layer. Cur and Ac synergistically resulted in rapid wound closure on the seventh day, and full-grown hair was observed on the 10th day. Individually they both take more than 20 days for wound closure. The increase in the concentration of curcumin increases the healing properties of the material. For days 1, 6, and 10 of the wound dressing experiment, the percentages of wound closure of the mice were the highest for NPAcC2 (i.e., 100%) compared to the untreated control (25%) while maintaining the integrity of the skin. These natural product-based hydrogels have limited side effects vs those caused by commercial drugs in wound healing.
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Affiliation(s)
- Anu Sharma
- Nanotechnology and Drug Delivery Research Group, Department of Chemistry, University of Delhi, Delhi-110007, India
| | - Parul Mittal
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi-110054, India
| | - Anita Yadav
- Nanotechnology and Drug Delivery Research Group, Department of Chemistry, University of Delhi, Delhi-110007, India
| | - Anil K Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi-110054, India
| | - Puja Panwar Hazari
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi-110054, India
| | - Rakesh Kumar Sharma
- Nanotechnology and Drug Delivery Research Group, Department of Chemistry, University of Delhi, Delhi-110007, India
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9
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Royes J, Bjørnestad VA, Brun G, Narayanan T, Lund R, Tribet C. Transition kinetics of mixed lipid:photosurfactant assemblies studied by time-resolved small angle X-ray scattering. J Colloid Interface Sci 2021; 610:830-841. [PMID: 34887060 DOI: 10.1016/j.jcis.2021.11.133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 10/26/2021] [Accepted: 11/22/2021] [Indexed: 01/29/2023]
Abstract
HYPOTHESIS Photoswitchable surfactants are used in the design of many light-responsive colloids and/or self-assemblies. Photo-isomerization enables to control molecular equilibrium, and triggers transient reorganizations with possibly out-of-equilibrium intermediate states that have been overlooked. Here, we address this question by an in depth structural investigation of intermediate lipid-surfactant assemblies that occur during fast isothermal photo-triggered transition in lipid:surfactant mixtures. EXPERIMENTS The structural parameters of mixed assemblies of azobenzene-containing cationic surfactant (AzoTMA) and dioleoylphosphatidylcholine (DOPC) lipids were studied by light scattering and time-resolved small angle X-ray scattering. Structural and compositional information about the assemblies and unimers in bulk were determined at the photostationary states, as well as at intermediate kinetic states formed during UV or blue light illumination. FINDINGS DOPC:AzoTMA systems form mixed assemblies representative of phospholipid:cationic surfactant mixtures, that evolve from spheroid, to rod-like micelles, and vesicles with increasing DOPC fraction. Transient assemblies detected during the photo-triggered kinetics are similar to the ones found in stationary states. But changes of AzoTMA unimers in bulk can be considerably faster than mass reorganizations of the mixed assemblies, suggesting that out-of-equilibrium conditions are transiently reached. Mass reorganization of the surfactant-enriched assemblies is much faster than in the lipid enriched ones, providing insight into the role of lipids in a slow reorganization of the assemblies.
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Affiliation(s)
- J Royes
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
| | - V A Bjørnestad
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, Oslo N-0315, Norway
| | - G Brun
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
| | - T Narayanan
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, Grenoble F-38043, France
| | - R Lund
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, Oslo N-0315, Norway
| | - C Tribet
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
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10
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Titov E, Sharma A, Lomadze N, Saalfrank P, Santer S, Bekir M. Photoisomerization of an Azobenzene‐Containing Surfactant Within a Micelle. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Evgenii Titov
- Theoretical Chemistry Institute of Chemistry University of Potsdam Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Anjali Sharma
- Experimental Physics Institute of Physics and Astronomy University of Potsdam Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Nino Lomadze
- Experimental Physics Institute of Physics and Astronomy University of Potsdam Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Peter Saalfrank
- Theoretical Chemistry Institute of Chemistry University of Potsdam Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Svetlana Santer
- Experimental Physics Institute of Physics and Astronomy University of Potsdam Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Marek Bekir
- Experimental Physics Institute of Physics and Astronomy University of Potsdam Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
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11
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Titov E. On the Low-Lying Electronically Excited States of Azobenzene Dimers: Transition Density Matrix Analysis. MOLECULES (BASEL, SWITZERLAND) 2021; 26:molecules26144245. [PMID: 34299521 PMCID: PMC8303869 DOI: 10.3390/molecules26144245] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 11/16/2022]
Abstract
Azobenzene-containing molecules may associate with each other in systems such as self-assembled monolayers or micelles. The interaction between azobenzene units leads to a formation of exciton states in these molecular assemblies. Apart from local excitations of monomers, the electronic transitions to the exciton states may involve charge transfer excitations. Here, we perform quantum chemical calculations and apply transition density matrix analysis to quantify local and charge transfer contributions to the lowest electronic transitions in azobenzene dimers of various arrangements. We find that the transitions to the lowest exciton states of the considered dimers are dominated by local excitations, but charge transfer contributions become sizable for some of the lowest ππ* electronic transitions in stacked and slip-stacked dimers at short intermolecular distances. In addition, we assess different ways to partition the transition density matrix between fragments. In particular, we find that the inclusion of the atomic orbital overlap has a pronounced effect on quantifying charge transfer contributions if a large basis set is used.
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Affiliation(s)
- Evgenii Titov
- Theoretical Chemistry, Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany
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12
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Akamatsu M, Kobayashi K, Iwase H, Sakaguchi Y, Tanaka R, Sakai K, Sakai H. Rapid controlled release by photo-irradiation using morphological changes in micelles formed by amphiphilic lophine dimers. Sci Rep 2021; 11:10754. [PMID: 34031460 PMCID: PMC8144387 DOI: 10.1038/s41598-021-90097-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 05/05/2021] [Indexed: 01/30/2023] Open
Abstract
Photo-induced rapid control of molecular assemblies, such as micelles and vesicles, enables effective and on-demand release of drugs or active components, with applications such as drug delivery systems (DDS) and cosmetics. Thus far, no attempts to optimize the responsiveness of photoresponsive molecular assemblies have been published. We previously reported photoresponsive surfactants bearing a lophine dimer moiety that exhibit fast photochromism in confined spaces, such as inside a molecular assembly. However, rapid control of the micelle structures and solubilization capacity have not yet been demonstrated. In the present work, photo-induced morphological changes in micelles were monitored using in-situ small-angle neutron scattering (SANS) and UV/Vis absorption spectroscopy. An amphiphilic lophine dimer (3TEG-LPD) formed elliptical micelles. These were rapidly elongated by ultraviolet light irradiation, which could be reversed by dark treatment, both within 60 s. For a solution of 3TEG-LPD micelles solubilizing calcein as a model drug molecule, fluorescence and SANS measurements indicated rapid release of the incorporated calcein into the bulk solvent under UV irradiation. Building on these results, we investigated rapid controlled release via hierarchical chemical processes: photoisomerization, morphological changes in the micelles, and drug release. This rapid controlled release system allows for effective and on-demand DDS.
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Affiliation(s)
- Masaaki Akamatsu
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
| | - Kazuki Kobayashi
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Hiroki Iwase
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
| | - Yoshifumi Sakaguchi
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
| | - Risa Tanaka
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Kenichi Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Hideki Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
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13
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Sun Y, Gao F, Yao Y, Jin H, Li X, Lin S. Light-Induced Reversible Hierarchical Self-Assembly of Amphiphilic Diblock Copolymers into Microscopic Vesicles with Tunable Optical and Nanocarrier Properties. ACS Macro Lett 2021; 10:525-530. [PMID: 35570756 DOI: 10.1021/acsmacrolett.1c00127] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In contrast to the conventional hierarchical self-assembly process, effective methods to enable reversible hierarchical self-assembly of block copolymers are comparatively few and limited in scope. Herein, we report, for the first time, a simple yet robust strategy for light-induced reversible hierarchical self-assembly of an amphiphilic diblock copolymer, poly(4-vinylpyridine)-block-poly[6-[4-(4-butyloxyphenylazo)phenoxy]hexyl methacrylate] (denoted P4VP-b-PAzoMA). The hierarchical structures are constructed via a two-step self-assembly process (first-level reverse micelles, second-level compound micelles, and rearrangement into micrometer-sized vesicles) driven by use of solvent. Intriguingly, because of reversible photoinduced trans-to-cis isomerization of azobenzene moieties in PAzoMA, the vesicles could disassemble into subunits upon UV light and then recover the nearly identical vesicular morphology upon visible light. Such a reversible hierarchical self-assembly process is accompanied by reversible fluorescence, encapsulation, and controlled release of dyes and can be used as a template for the synthesis of nanoparticles. Clearly, the ability to render the light-enabled reversible hierarchical self-assembly provides a unique platform for smart delivery vehicles and templates for nanomaterials.
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Affiliation(s)
- Yao Sun
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Fei Gao
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yuan Yao
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Haibao Jin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xinxin Li
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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14
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Chen S, Costil R, Leung FK, Feringa BL. Self-Assembly of Photoresponsive Molecular Amphiphiles in Aqueous Media. Angew Chem Int Ed Engl 2021; 60:11604-11627. [PMID: 32936521 PMCID: PMC8248021 DOI: 10.1002/anie.202007693] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Indexed: 12/22/2022]
Abstract
Amphiphilic molecules, comprising hydrophobic and hydrophilic moieties and the intrinsic propensity to self-assemble in aqueous environment, sustain a fascinating spectrum of structures and functions ranging from biological membranes to ordinary soap. Facing the challenge to design responsive, adaptive, and out-of-equilibrium systems in water, the incorporation of photoresponsive motifs in amphiphilic molecular structures offers ample opportunity to design supramolecular systems that enables functional responses in water in a non-invasive way using light. Here, we discuss the design of photoresponsive molecular amphiphiles, their self-assembled structures in aqueous media and at air-water interfaces, and various approaches to arrive at adaptive and dynamic functions in isotropic and anisotropic systems, including motion at the air-water interface, foam formation, reversible nanoscale assembly, and artificial muscle function. Controlling the delicate interplay of structural design, self-assembling conditions and external stimuli, these responsive amphiphiles open several avenues towards application such as soft adaptive materials, controlled delivery or soft actuators, bridging a gap between artificial and natural dynamic systems.
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Affiliation(s)
- Shaoyu Chen
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenNetherlands
| | - Romain Costil
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenNetherlands
| | - Franco King‐Chi Leung
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenNetherlands
- Present address: State Key Laboratory of Chemical Biology and Drug DiscoveryDepartment of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHong KongChina
| | - Ben L. Feringa
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747AGGroningenNetherlands
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15
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Chen S, Costil R, Leung FK, Feringa BL. Self‐Assembly of Photoresponsive Molecular Amphiphiles in Aqueous Media. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202007693] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shaoyu Chen
- Stratingh Institute for Chemistry University of Groningen Nijenborgh 4 9747AG Groningen Netherlands
| | - Romain Costil
- Stratingh Institute for Chemistry University of Groningen Nijenborgh 4 9747AG Groningen Netherlands
| | - Franco King‐Chi Leung
- Stratingh Institute for Chemistry University of Groningen Nijenborgh 4 9747AG Groningen Netherlands
- Present address: State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hong Kong China
| | - Ben L. Feringa
- Stratingh Institute for Chemistry University of Groningen Nijenborgh 4 9747AG Groningen Netherlands
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16
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Ma S, Kurihara S, Tomimori Y, Kim S, Kwon E, Muramatsu A, Kanie K. Self-assembly of photoresponsive azo-containing phospholipids with a polar group as the tail. RSC Adv 2020; 10:32984-32991. [PMID: 35516475 PMCID: PMC9056651 DOI: 10.1039/d0ra06803a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 08/28/2020] [Indexed: 01/06/2023] Open
Abstract
Vesicles or micelles prepared from amphiphiles with azobenzene (Az) moieties and long alkyl chains have attracted much attention in drug delivery systems. To induce release behavior from smart carriers via trans–cis photoisomerization of the Az groups, UV light exposure is typically used, but it can damage DNA and hardly penetrates cells. In this paper, Az-containing phospholipids without long alkyl tails were designed and synthesized; in these compounds, the end group of the Az moiety was substituted with a –NO2 and –OCH3 group (abbreviated N6 and M6, respectively). N6 self-assembled into H-aggregates with an interdigitated bilayered structure in water through the antiparallel orientation due to π–π interactions of the Az group, the attractive van der Waals forces, and the interactions and bending behavior of the phosphocholine groups. Vesicles showing visible light stimuli-responsive behavior were obtained by mixing N6 and M6, and the release of encapsulated calcein was triggered by visible light. A mixture of a nitro- and methoxy-substituted azo-containing phospholipids without long alkyl tails formed vesicles showing visible light stimuli-responsive behavior. Release of encapsulated calcein from the vesicles was triggered by visible light.![]()
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Affiliation(s)
- Su Ma
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan .,School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology No. 99 Xuefu Road, Huqiu District Suzhou 215009 China
| | - Seiji Kurihara
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Yasuhiro Tomimori
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Sunnam Kim
- Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Eunsang Kwon
- Graduate School of Science Research and Analytical Center for Giant Molecules, Tohoku University 6-3 Aramakiazaaoba, Aoba-ku Sendai 990-8578 Japan
| | - Atsushi Muramatsu
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University Katahira 2-1-1, Aoba-ku Sendai 980-8577 Japan
| | - Kiyoshi Kanie
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University Katahira 2-1-1, Aoba-ku Sendai 980-8577 Japan
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17
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Silanteva IA, Komolkin AV, Mamontova VV, Vorontsov-Velyaminov PN, Santer S, Kasyanenko NA. Some Features of Surfactant Organization in DNA Solutions at Various NaCl Concentrations. ACS OMEGA 2020; 5:18234-18243. [PMID: 32743199 PMCID: PMC7391854 DOI: 10.1021/acsomega.0c01850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/30/2020] [Indexed: 05/17/2023]
Abstract
The photosensitive azobenzene-containing surfactant C4-Azo-OC6TMAB is a promising agent for reversible DNA packaging in a solution. The simulation of the trans-isomer surfactant organization into associates in a solution with and without salt as well as its binding to DNA at different NaCl concentrations was carried out by molecular dynamics. Experimental data obtained by spectral and hydrodynamic methods were used to verify the results of simulation. It was shown that head-to-tail aggregates with close to antiparallel orientation of surfactant molecules were formed at certain NaCl and surfactant concentrations (below critical micelle concentration). Such aggregates have two positively charged ends, and therefore, they can be attracted to negatively charged DNA phosphates far located along the chain, as well as those that belong to different molecules. This contributes to the formation of intermolecular DNA-DNA contacts, and this way, the experimentally observed precipitation of DNA can be explained.
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Affiliation(s)
- Irina A. Silanteva
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Andrei V. Komolkin
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Veronika V. Mamontova
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | | | - Svetlana Santer
- Experimental
Physics, Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany
| | - Nina A. Kasyanenko
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
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18
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Narayanan T, Konovalov O. Synchrotron Scattering Methods for Nanomaterials and Soft Matter Research. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E752. [PMID: 32041363 PMCID: PMC7040635 DOI: 10.3390/ma13030752] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/29/2020] [Accepted: 01/31/2020] [Indexed: 12/17/2022]
Abstract
This article aims to provide an overview of broad range of applications of synchrotron scattering methods in the investigation of nanoscale materials. These scattering techniques allow the elucidation of the structure and dynamics of nanomaterials from sub-nm to micron size scales and down to sub-millisecond time ranges both in bulk and at interfaces. A major advantage of scattering methods is that they provide the ensemble averaged information under in situ and operando conditions. As a result, they are complementary to various imaging techniques which reveal more local information. Scattering methods are particularly suitable for probing buried structures that are difficult to image. Although, many qualitative features can be directly extracted from scattering data, derivation of detailed structural and dynamical information requires quantitative modeling. The fourth-generation synchrotron sources open new possibilities for investigating these complex systems by exploiting the enhanced brightness and coherence properties of X-rays.
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19
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Akamatsu M, Kobayashi K, Sakai K, Sakai H. Accelerated recombination of lophyl radicals and control of the surface tension with amphiphilic lophine dimers. Chem Commun (Camb) 2019; 55:9769-9772. [PMID: 31329196 DOI: 10.1039/c9cc04579a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We report the accelerated photoisomerization of amphiphilic lophine dimers based on the inner environments of molecular assemblies and rapid control of the interfacial properties of aqueous solution with photoirradiation. This novel photoisomerization system enables on-demand controlled release of drugs, perfumes, and other active compounds.
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Affiliation(s)
- Masaaki Akamatsu
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
| | - Kazuki Kobayashi
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
| | - Kenichi Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan. and Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Hideki Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan. and Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
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20
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Fan Y, Wang Y. Applications of small-angle X-ray scattering/small-angle neutron scattering and cryogenic transmission electron microscopy to understand self-assembly of surfactants. Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.02.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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21
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Akamatsu M, Suzuki T, Kobayashi K, Tsuchiya K, Sakai K, Sakai H. Accelerated Recombination of Lophyl Radicals with Self-Assembled Amphiphilic Lophine Dimer. J Oleo Sci 2019; 68:659-664. [PMID: 31178463 DOI: 10.5650/jos.ess19010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This report focuses on acceleration of the recombination of lophyl radicals with a lophine dimer derivative by forming molecular assemblies. A newly synthesized cationic amphiphilic lophine dimer formed molecular assemblies with a diameter of ~220 nm in an aqueous medium. When the molecular assemblies were formed, the rate of recombination of lophyl radicals, produced by ultraviolet light irradiation, was accelerated 50,000-fold compared to that in an organic solvent. The rate enhancement is likely derived from the short diffusion distance of the lophyl radicals in the molecular assemblies. These results revealed that accumulation of the lophine dimers via self-assembly remarkably accelerated the recombination of lophyl radicals. This novel photoisomerization system could rapidly control the interfacial properties or morphologies of molecular assemblies when used for applications, such as efficient delivery of drugs or active components.
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Affiliation(s)
- Masaaki Akamatsu
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
| | - Taiki Suzuki
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
| | - Kazuki Kobayashi
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
| | - Koji Tsuchiya
- Research Institute for Science and Technology, Tokyo University of Science
| | - Kenichi Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science.,Research Institute for Science and Technology, Tokyo University of Science
| | - Hideki Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science.,Research Institute for Science and Technology, Tokyo University of Science
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22
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Kelly EA, Houston JE, Evans RC. Probing the dynamic self-assembly behaviour of photoswitchable wormlike micelles in real-time. SOFT MATTER 2019; 15:1253-1259. [PMID: 30418450 DOI: 10.1039/c8sm01948g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Understanding the dynamic self-assembly behaviour of azobenzene photosurfactants (AzoPS) is crucial to advance their use in controlled release applications such as drug delivery and micellar catalysis. Currently, their behaviour in the equilibrium cis- and trans-photostationary states is more widely understood than during the photoisomerisation process itself. Here, we investigate the time-dependent self-assembly of the different photoisomers of a model neutral AzoPS, tetraethylene glycol mono(4',4-octyloxy,octyl-azobenzene) (C8AzoOC8E4) using small-angle neutron scattering (SANS). We show that the incorporation of in situ UV-Vis absorption spectroscopy with SANS allows the scattering profile, and hence micelle shape, to be correlated with the extent of photoisomerisation in real-time. It was observed that C8AzoOC8E4 could switch between wormlike micelles (trans native state) and fractal aggregates (under UV light), with changes in the self-assembled structure arising concurrently with changes in the absorption spectrum. Wormlike micelles could be recovered within 60 seconds of blue light illumination. To the best of our knowledge, this is the first time the degree of AzoPS photoisomerisation has been tracked in situ through combined UV-Vis absorption spectroscopy-SANS measurements. This technique could be widely used to gain mechanistic and kinetic insights into light-dependent processes that are reliant on self-assembly.
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Affiliation(s)
- Elaine A Kelly
- School of Chemistry and CRANN, University of Dublin, Trinity College, College Green, Dublin 2, Ireland
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23
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Wu Z, Li X, Jiang X, Xie T, Li H, Zhang G, Jiang J. Photoswitchable de/adsorption of an azobenzene-derived surfactant on a silica surface. Phys Chem Chem Phys 2019; 21:21030-21037. [DOI: 10.1039/c9cp01940e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Microscopic mechanism of photo-controllable adsorption/desorption behavior of an azobenzene-based surfactant on a silica surface was investigated.
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Affiliation(s)
- Ziye Wu
- School of Information
- Guizhou University of Finance and Economics
- Guiyang 550025
- China
- Hefei National Laboratory for Physical Sciences at the Microscale
| | - Xin Li
- Hefei National Laboratory for Physical Sciences at the Microscale
- CAS Center for Excellence in Nanoscience
- School of Chemistry and Materials Science
- University of Science and Technology of China
- Hefei
| | - Xiaoming Jiang
- Department of Chemistry and Chemical Engineering
- Guizhou University
- Guiyang 550025
- China
| | - Tian Xie
- State Key Laboratory of Efficient Utilization for Low Grade Phosphate Rock and Its Associated Resources
- Wengfu Group
- Guiyang 550014
- China
| | - Huiyong Li
- State Key Laboratory of Efficient Utilization for Low Grade Phosphate Rock and Its Associated Resources
- Wengfu Group
- Guiyang 550014
- China
| | - Guozhen Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale
- CAS Center for Excellence in Nanoscience
- School of Chemistry and Materials Science
- University of Science and Technology of China
- Hefei
| | - Jun Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale
- CAS Center for Excellence in Nanoscience
- School of Chemistry and Materials Science
- University of Science and Technology of China
- Hefei
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24
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Blayo C, Houston JE, King SM, Evans RC. Unlocking Structure-Self-Assembly Relationships in Cationic Azobenzene Photosurfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10123-10134. [PMID: 30071720 DOI: 10.1021/acs.langmuir.8b02109] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Azobenzene photosurfactants are light-responsive amphiphiles that have garnered significant attention for diverse applications including delivery and sorting systems, phase transfer catalysis, and foam drainage. The azobenzene chromophore changes both its polarity and conformation (trans-cis isomerization) in response to UV light, while the amphiphilic structure drives self-assembly. Detailed understanding of the inherent relationship between the molecular structure, physicochemical behavior, and micellar arrangement of azobenzene photosurfactants is critical to their usefulness. Here, we investigate the key structure-function-assembly relationships in the popular cationic alkylazobenzene trimethylammonium bromide (AzoTAB) family of photosurfactants. We show that subtle changes in the surfactant structure (alkyl tail, spacer length) can lead to large variations in the critical micelle concentration, particularly in response to light, as determined by surface tensiometry and dynamic light scattering. Small-angle neutron scattering studies also reveal the formation of more diverse micellar aggregate structures (ellipsoids, cylinders, spheres) than predicted based on simple packing parameters. The results suggest that whereas the azobenzene core resides in the effective hydrophobic segment in the trans-isomer, it forms part of the effective hydrophilic segment in the cis-isomer because of the dramatic conformational and polarity changes induced by photoisomerization. The extent of this shift in the hydrophobic-hydrophilic balance is determined by the separation between the azobenzene core and the polar head group in the molecular structure. Our findings show that judicious design of the AzoTAB structure enables selective tailoring of the surfactant properties in response to light, such that they can be exploited and controlled in a reliable fashion.
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Affiliation(s)
- Camille Blayo
- School of Chemistry and CRANN , University of Dublin, Trinity College , College Green , Dublin 2 , Ireland
| | - Judith E Houston
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ) , Forschungszentrum Jülich GmbH , Lichtenbergstr. 1 , 85748 Garching , Germany
| | - Stephen M King
- ISIS Pulsed Neutron Source, STFC, Rutherford Appleton Laboratory , Didcot , Oxfordshire OX11 0QX , U.K
| | - Rachel C Evans
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , U.K
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25
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Kasyanenko N, Unksov I, Bakulev V, Santer S. DNA Interaction with Head-to-Tail Associates of Cationic Surfactants Prevents Formation of Compact Particles. Molecules 2018; 23:E1576. [PMID: 29958479 PMCID: PMC6100511 DOI: 10.3390/molecules23071576] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/26/2018] [Accepted: 06/26/2018] [Indexed: 12/11/2022] Open
Abstract
Cationic azobenzene-containing surfactants are capable of condensing DNA in solution with formation of nanosized particles that can be employed in gene delivery. The ratio of surfactant/DNA concentration and solution ionic strength determines the result of DNA-surfactant interaction: Complexes with a micelle-like surfactant associates on DNA, which induces DNA shrinkage, DNA precipitation or DNA condensation with the emergence of nanosized particles. UV and fluorescence spectroscopy, low gradient viscometry and flow birefringence methods were employed to investigate DNA-surfactant and surfactant-surfactant interaction at different NaCl concentrations, [NaCl]. It was observed that [NaCl] (or the Debye screening radius) determines the surfactant-surfactant interaction in solutions without DNA. Monomers, micelles and non-micellar associates of azobenzene-containing surfactants with head-to-tail orientation of molecules were distinguished due to the features of their absorption spectra. The novel data enabled us to conclude that exactly the type of associates (together with the concentration of components) determines the result of DNA-surfactant interaction. Predomination of head-to-tail associates at 0.01 M < [NaCl] < 0.5 M induces DNA aggregation and in some cases DNA precipitation. High NaCl concentration (higher than 0.8 M) prevents electrostatic attraction of surfactants to DNA phosphates for complex formation. DAPI dye luminescence in solutions with DNA-surfactant complexes shows that surfactant tails overlap the DNA minor groove. The addition of di- and trivalent metal ions before and after the surfactant binding to DNA indicate that the bound surfactant molecules are located on DNA in islets.
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Affiliation(s)
- Nina Kasyanenko
- Department of Physics, Saint Petersburg State University, 199034 St Petersburg, Russia.
| | - Ivan Unksov
- Department of Physics, Saint Petersburg State University, 199034 St Petersburg, Russia.
| | - Vladimir Bakulev
- Department of Physics, Saint Petersburg State University, 199034 St Petersburg, Russia.
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany.
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26
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Shvetsov SA, Emelyanenko AV, Boiko NI, Zolot'ko AS, Zhang YS, Liu JH, Khokhlov AR. Optical orientation of nematic liquid crystal droplets via photoisomerization of an azodendrimer dopant. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:870-879. [PMID: 29600148 PMCID: PMC5870153 DOI: 10.3762/bjnano.9.81] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 02/11/2018] [Indexed: 06/08/2023]
Abstract
Two sequential transformations of the orientational structure in nematic liquid crystal droplets containing a dendrimer additive (nanosized macromolecules with light-absorbing azobenzene terminal moieties) under light irradiation in the UV-blue spectral range were investigated. The origin of these transitions is in the change of the boundary conditions due to photoisomerization of the dendrimer adsorbed onto the liquid crystal-glycerol interface. It was shown that the photoisomerization processes of dendrimer molecules in a liquid crystal are accompanied by a spatial rearrangement of their azobenzene moieties, which is the key point in the explanation of the observed effects.
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Affiliation(s)
- Sergey A Shvetsov
- M.V. Lomonosov Moscow State University, Moscow, 119991, Russia
- P.N. Lebedev Physical Institute, Moscow, 119991, Russia
| | | | - Natalia I Boiko
- M.V. Lomonosov Moscow State University, Moscow, 119991, Russia
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27
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Montagna M, Guskova O. Photosensitive Cationic Azobenzene Surfactants: Thermodynamics of Hydration and the Complex Formation with Poly(methacrylic acid). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:311-321. [PMID: 29228776 DOI: 10.1021/acs.langmuir.7b03638] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this computational work, we investigate the photosensitive cationic surfactants with the trimethylammonium or polyamine hydrophilic head and the azobenzene-containing hydrophobic tail. The azobenzene-based molecules are known to undergo a reversible trans-cis-trans isomerization reaction when subjected to UV-visible light irradiation. Combining the density functional theory and the all-atom molecular dynamics simulations, the structural and the hydration properties of the trans- and the cis-isomers and their interaction with the oppositely charged poly(methacrylic acid) in aqueous solution are investigated. We establish and quantify the correlations of the molecular structure and the isomerization state of the surfactants and their hydrophilicity/hydrophobicity and the self-assembling altered by light. For this reason, we compare the hydration free energies of the trans- and the cis-isomers. Moreover, the investigations of the interaction strength between the azobenzene molecules and the polyanion provide additional elucidations of the recent experimental and theoretical studies on the light triggered reversible deformation behavior of the microgels and the polymer brushes loaded with azobenzene surfactants.
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Affiliation(s)
- Maria Montagna
- Institute Theory of Polymers, Leibniz Institute of Polymer Research Dresden , Hohe Str. 6, D-01069 Dresden, Germany
| | - Olga Guskova
- Institute Theory of Polymers, Leibniz Institute of Polymer Research Dresden , Hohe Str. 6, D-01069 Dresden, Germany
- Dresden Center for Computational Materials Science (DCMS), Technische Universität Dresden , D-01062 Dresden, Germany
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28
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Narayanan T, Wacklin H, Konovalov O, Lund R. Recent applications of synchrotron radiation and neutrons in the study of soft matter. CRYSTALLOGR REV 2017. [DOI: 10.1080/0889311x.2016.1277212] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Hanna Wacklin
- European Spallation Source ERIC, Lund, Sweden
- Physical Chemistry, Lund University, Lund, Sweden
| | | | - Reidar Lund
- Department of Chemistry, University of Oslo, Blindern, Oslo, Norway
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29
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Martin N, Sharma KP, Harniman RL, Richardson RM, Hutchings RJ, Alibhai D, Li M, Mann S. Light-induced dynamic shaping and self-division of multipodal polyelectrolyte-surfactant microarchitectures via azobenzene photomechanics. Sci Rep 2017; 7:41327. [PMID: 28112266 PMCID: PMC5256308 DOI: 10.1038/srep41327] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/15/2016] [Indexed: 01/11/2023] Open
Abstract
Light-induced shape transformations represent a fundamental step towards the emergence of adaptive materials exhibiting photomechanical behaviours. Although a range of covalent azobenzene-based photoactive materials has been demonstrated, the use of dynamic photoisomerization in mesostructured soft solids involving non-covalent co-assembly has received little attention. Here we prepare discrete micrometre-sized hydrated particles of a hexagonally ordered polyelectrolyte-surfactant mesophase based on the electrostatically induced co-assembly of poly(sodium acrylate) (PAA) and trans-azobenzene trimethylammonium bromide (trans-azoTAB), and demonstrate unusual non-equilibrium substrate-mediated shape transformations to complex multipodal microarchitectures under continuous blue light. The microparticles spontaneously sequester molecular dyes, functional enzymes and oligonucleotides, and undergo self-division when transformed to the cis state under UV irradiation. Our results illustrate that weak bonding interactions in polyelectrolyte-azobenzene surfactant mesophases can be exploited for photo-induced long-range molecular motion, and highlight how dynamic shape transformations and autonomous division can be activated by spatially confining azobenzene photomechanics in condensed microparticulate materials.
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Affiliation(s)
- Nicolas Martin
- Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
| | - Kamendra P. Sharma
- Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Robert L. Harniman
- Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
| | - Robert M. Richardson
- School of Physics, H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK
| | - Ricky J. Hutchings
- Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
| | - Dominic Alibhai
- Wolfson Bioimaging Facility, Faculty of Biomedical Sciences, University of Bristol, University Walk, Bristol BS8 1TD, UK
| | - Mei Li
- Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
| | - Stephen Mann
- Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
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