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Highly stretchable and tough alginate-based cyclodextrin/Azo-polyacrylamide interpenetrating network hydrogel with self-healing properties. Carbohydr Polym 2021; 256:117595. [PMID: 33483080 DOI: 10.1016/j.carbpol.2020.117595] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 12/13/2020] [Accepted: 12/28/2020] [Indexed: 12/17/2022]
Abstract
Most structural self-healing materials were developed based on either reversible supramolecular interaction or dynamic covalent bonding. It seems a good idea to incorporate self-healing properties into high-performance materials. In this study, we fabricated the alginate-based cyclodextrin and polyacrylamide azobenzene highly stretchable and tough interpenetrating composite hydrogel with self-repairing behavior under light irradiation. Initially, the alginate-based cyclodextrin and polyacrylamide azobenzene were designed and synthesized. The corresponding structural, thermal, and morphological properties of hydrogels were characterized. The reversible transformation of the sol-gel can be achieved by the irradiation upon ultraviolet light and visible light. The self-healing behavior of this composited gel is based on the host-guest interaction between cyclodextrin and azobenzene. The recovery gel elongation at 48 h healing in the dark condition was is 0.04 MPa, with an elongation of 1140 %. Therefore, this gel can achieve self-healing ability while maintaining highly stretchable and tough performance.
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3
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Zhao P, Xia J, Cao M, Xu H. Wavelength-Controlled Light-Responsive Polymer Vesicle Based on Se-S Dynamic Chemistry. ACS Macro Lett 2020; 9:163-168. [PMID: 35638677 DOI: 10.1021/acsmacrolett.9b00983] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Wavelength-controlled Se-S dynamic chemistry was put forward recently as a convenient way to regulate the balance of a selenide sulfide exchange reaction. In this paper, we synthesized an asymmetric polymeric amphiphile linked with a Se-S bond and then induced it to self-assemble into vesicles in water. When the visible light was applied to the assembly solution with addition of toluene, Se-S bonds containing vesicles were ruptured. Thus, the wavelength-controlled light responses of relatively stable polymer assembly were accomplished by introduction of the Se-S dynamic covalent bond, and the response mechanism of the Se-S bond in the vesicle was explored by nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), and X-ray photoelectron spectroscopy (XPS). The results indicated that fracture of the Se-S bond led to the dissociation of assembly. Introduction of Se-S dynamic chemistry into the molecular assembly area enriched the light-responsive polymer systems and would bring many potential applications in the future.
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Affiliation(s)
- Peng Zhao
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Jiahao Xia
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Muqing Cao
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Huaping Xu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
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Hayashi K, Watanabe M, Iwasaki T, Shudou M, Uda RM. Endosomal escape by photo-activated fusion of liposomes containing a malachite green derivative: a novel class of photoresponsive liposomes for drug delivery vehicles. Photochem Photobiol Sci 2019; 18:1471-1478. [PMID: 30964475 DOI: 10.1039/c8pp00495a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We conducted photo-activated delivery of drugs based on the fusion of liposomes with endocytic membranes, thus allowing the direct release of encapsulated drugs inside the cytoplasm. As described in our earlier works, liposomes can be photoresponsive and fusogenic following the incorporation of a malachite green derivative carrying a long alkyl chain (MGL) into the lipid membrane. We prepared MGL liposomes using 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylcholine and encapsulated doxorubicin (DOX). Though the shape of MGL liposomes became elliptical after encapsulating DOX, UV irradiation did not enhance DOX leakage from MGL liposomes. We demonstrated the cellular uptake of MGL liposomes into murine cells derived from colon cancer (Colon 26 cells) using flow cytometry, and we found that the uptake was governed by a clathrin-dependent endocytosis pathway. Confocal fluorescence microscopic observations of Colon 26 cells treated with MGL liposomes encapsulating DOX revealed that DOX was localized in endosomes under dark conditions, while DOX was observed in the cytosol and nucleus after UV irradiation. The viability of Colon 26 cells treated with MGL liposomes encapsulating DOX was reduced by UV irradiation, indicating photo-induced enhancement of anti-cancer efficacy.
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Affiliation(s)
- Keita Hayashi
- Department of Chemical Engineering, National Institute of Technology, Nara college, Yata 22, Yamato-koriyama, Nara 639-1080, Japan.
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5
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Bai L, Zhang Y, Tong W, Sun L, Huang H, An Q, Tian N, Chu PK. Graphene for Energy Storage and Conversion: Synthesis and Interdisciplinary Applications. ELECTROCHEM ENERGY R 2019. [DOI: 10.1007/s41918-019-00042-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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6
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Higashiguchi K, Matsuda K. Photoinduced LCST Behavior of Amphiphilic Diarylethene Assemblies: Phototransformative Supramolecular Architectures and Photodriven Actuation. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Kenji Matsuda
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University
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Tabor RF, McCoy TM, Hu Y, Wilkinson BL. Physicochemical and Biological Characterisation of Azobenzene-Containing Photoswitchable Surfactants. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180024] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rico F. Tabor
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Thomas M. McCoy
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Yingxue Hu
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Brendan L. Wilkinson
- School of Science and Technology, University of New England, Armidale, New South Wales 2351, Australia
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8
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9
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Wang X, Xie F, Duan P, Liu M. Dynamic Evolution of Coaxial Nanotoruloid in the Self-Assembled Naphthyl-Containing l-Glutamide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12534-12541. [PMID: 27622531 DOI: 10.1021/acs.langmuir.6b02867] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Supramolecular gelation provides an efficient way of fabricating functional soft materials with various nanostructures. Amphiphiles containing naphthyl group and dialkyl l-glutamide with a methylene spacer, 1NALG and 2NALG, have been designed and their self-assembly in various organic solvents were investigated. Both of these compounds formed organogels in organic solvents. In the case of the alcohol solvents, the initially formed organogel underwent gel-precipitate transformation, which process was monitored by the UV-vis, CD spectra, and SEM observation. It was revealed that both the compounds formed the nanofiber structures in gel phases. Interestingly, in alcohol solvents, during the phase transition from the gel to precipitates, the nanofibers gradually transformed into a series of long coaxial solid nanotoruloid, a unique nanostructure that has never been observed in other self-assembly systems. In addition, during the gel formation, the nanofibers with supramolecular chirality or M-chirality were obtained. However, the coaxial nanotoruloid showed an inversed P-chirality. Comprehensive analysis based on various data and the gelator structure, substituent position, type of organic solvents, it was suggested that the synergistic interactions between the amide H-bond and π-π stacking of the naphthyl groups played important roles in the formation of the gels as well as the nanofiber, while the H-bonding ability of alcohol to the amide group can subtly regulate the gelator-gelator interactions and lead to the dynamic and hierarchical evolution of the unique nanostructures.
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Affiliation(s)
- Xiufeng Wang
- College of Science, China University of Petroleum (East China) , Qingdao 266580, Shandong China
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry Chinese Academy of Sciences , Beijing 100190, China
| | - Fan Xie
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry Chinese Academy of Sciences , Beijing 100190, China
| | - Pengfei Duan
- Key Laboratory of Nanosystem and Hierarchical Fabrication, Chinese Academy of Sciences, National Center for Nanoscience and Technology , Beijing 100190, China
| | - Minghua Liu
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry Chinese Academy of Sciences , Beijing 100190, China
- Key Laboratory of Nanosystem and Hierarchical Fabrication, Chinese Academy of Sciences, National Center for Nanoscience and Technology , Beijing 100190, China
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10
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Zakrevskyy Y, Roxlau J, Brezesinski G, Lomadze N, Santer S. Photosensitive surfactants: micellization and interaction with DNA. J Chem Phys 2015; 140:044906. [PMID: 25669582 DOI: 10.1063/1.4862678] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Recently, photosensitive surfactants have re-attracted considerable attention. It has been shown that their association with oppositely charged biologically important polyelectrolytes, such as DNA or microgels, can be efficiently manipulated simply by light exposure. In this article, we investigate the self-assembly of photosensitive surfactants as well as their interactions with DNA by calorimetric and spectroscopic methods. Critical micelle concentration (CMC), standard micellization enthalpy, entropy, and Gibbs energy were determined in different conditions (ionic strengths and temperatures) for a series of cationic surfactants with an azobenzene group in their tail. It is shown, that aggregation forces of photosensitive units play an important role in the micellization giving the major contribution to the micellization enthalpy. The onset of the aggregation can be traced from shift of the absorption peak position in the UV-visible spectrum. Titration UV-visible spectroscopy is used as an alternative, simple, and sensitive approach to estimate CMC. The titration UV-visible spectroscopy was also employed to investigate interactions (CAC: critical aggregation concentration, precipitation, and colloidal stabilization) in the DNA-surfactant complex.
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Affiliation(s)
- Yuriy Zakrevskyy
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Julian Roxlau
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Gerald Brezesinski
- Department of Interfaces, Max Planck Institute of Colloids and Interfaces, Research Campus Potsdam-Golm, D-14476 Potsdam, Germany
| | - Nino Lomadze
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
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Chaudhary GR, Singh P, Kaur G, Mehta S, Kumar S, Dilbaghi N. Multifaceted Approach for the Fabrication of Metallomicelles and Metallic Nanoparticles Using Solvophobic Bisdodecylaminepalladium (II) Chloride as Precursor. Inorg Chem 2015; 54:9002-12. [DOI: 10.1021/acs.inorgchem.5b01171] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ganga Ram Chaudhary
- Department
of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
| | - Prabjot Singh
- Department
of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
| | - Gurpreet Kaur
- Department
of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
| | - S.K. Mehta
- Department
of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
| | - Sandeep Kumar
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science & Technology, Hisar 125 001, Haryana India
| | - Neeraj Dilbaghi
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science & Technology, Hisar 125 001, Haryana India
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12
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Sakano T, Ohashi T, Yamanaka M, Kobayashi K. Photoresponsive self-assembled hexameric capsules based on calix[4]resorcinarenes bearing azobenzene dendron conjugates as side chains. Org Biomol Chem 2015; 13:8359-64. [DOI: 10.1039/c5ob00997a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Calix[4]resorcinarenes with azobenzene dendron conjugates achieve control of the assembly–disassembly–reassembly process of the hydrogen-bonded hexameric capsules by a light stimulus.
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Affiliation(s)
- Tsubasa Sakano
- Department of Chemistry
- Faculty of Science
- Shizuoka University
- Shizuoka 422-8529
- Japan
| | - Toshifumi Ohashi
- Department of Chemistry
- Faculty of Science
- Shizuoka University
- Shizuoka 422-8529
- Japan
| | - Masamichi Yamanaka
- Department of Chemistry
- Faculty of Science
- Shizuoka University
- Shizuoka 422-8529
- Japan
| | - Kenji Kobayashi
- Department of Chemistry
- Faculty of Science
- Shizuoka University
- Shizuoka 422-8529
- Japan
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13
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Shima T, Muraoka T, Tabata KV, Noji H, Kinbara K. Light-triggered vesicle formation: important factors for generation of vesicles and possible applications. PURE APPL CHEM 2014. [DOI: 10.1515/pac-2014-0604] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe effect of the structure of a chromophore on the light-triggered vesicle formation from particles containing the chromophore and a phospholipid was studied. It was revealed that not only the photoactivity but also the amphiphilicity is essential for the chromophore to cause the vesicle formation, where the amphiphilicity likely allows coexistence of the amphiphile and phospholipid in the particles. It was also found that an ionic solute used in the hydration media has an encouraging effect on the photo-generation of vesicles. In addition to these fundamental aspects, vesicle formation in a microenvironment and encapsulation of a substance in the vesicles were also demonstrated.
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Affiliation(s)
- Tatsuya Shima
- 1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
| | | | - Kazuhito V. Tabata
- 3Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hiroyuki Noji
- 3Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazushi Kinbara
- 1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
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14
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Shima T, Muraoka T, Hamada T, Morita M, Takagi M, Fukuoka H, Inoue Y, Sagawa T, Ishijima A, Omata Y, Yamashita T, Kinbara K. Micrometer-size vesicle formation triggered by UV light. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7289-7295. [PMID: 24898450 DOI: 10.1021/la5008022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Vesicle formation is a fundamental kinetic process related to the vesicle budding and endocytosis in a cell. In the vesicle formation by artificial means, transformation of lamellar lipid aggregates into spherical architectures is a key process and known to be prompted by e.g. heat, infrared irradiation, and alternating electric field induction. Here we report UV-light-driven formation of vesicles from particles consisting of crumpled phospholipid multilayer membranes involving a photoactive amphiphilic compound composed of 1,4-bis(4-phenylethynyl)benzene (BPEB) units. The particles can readily be prepared from a mixture of these components, which is casted on the glass surface followed by addition of water under ultrasonic radiation. Interestingly, upon irradiation with UV light, micrometer-size vesicles were generated from the particles. Neither infrared light irradiation nor heating prompted the vesicle formation. Taking advantage of the benefits of light, we successfully demonstrated micrometer-scale spatiotemporal control of single vesicle formation. It is also revealed that the BPEB units in the amphiphile are essential for this phenomenon.
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Affiliation(s)
- Tatsuya Shima
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University , 2-1-1, Katahira, Aoba-ku, Sendai 980-8577 Japan
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15
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Vijay R, Baskar G, Mandal AB, Polavarapu PL. Unprecedented relationship between the size of spherical chiral micellar aggregates and their specific optical rotations. J Phys Chem A 2013; 117:3791-7. [PMID: 23574486 DOI: 10.1021/jp401544g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Transmission electron microscopy (TEM) images and fluorescence quenching methods indicated that lauryl ester of L-phenylalanine (LEP) and lauryl ester of L-tyrosine (LET) form spherical chiral micelles in the 50-200 mM range and their size increases with concentration. The number of molecules present in these spherical chiral aggregates varied from 80 to 160 for LEP and 80-100 for LET. The specific optical rotation, representing circular birefringence, for LEP at 405 nm and 32 °C is found to increase linearly from 37 deg cc g(-1) dm(-1) for an isolated molecule to 56 deg cc g(-1) dm(-1) for ∼200 nm size aggregate. A similar trend was found for temperatures up to 70 °C and at other visible wavelengths. A linear relation between specific optical rotation and the size of aggregate is also observed for LET. Circular dichroism, as measured in both the visible and infrared wavelength regions, however did not reveal any concentration dependent changes. The unique sensitivity uncovered for specific optical rotation as a function of the size of spherical chiral aggregates is unprecedented and opens new areas of enquiry for physical chemists.
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Affiliation(s)
- R Vijay
- Department of Chemistry, Vanderbilt University , Nashville, Tennessee 37235, United States
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16
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Awad MK, El-Hendawy MM, Fayed TA, Etaiw SEH, English NJ. Aromatic ring size effects on the photophysics and photochemistry of styrylbenzothiazole. Photochem Photobiol Sci 2013; 12:1220-31. [DOI: 10.1039/c3pp25367h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Maji SK, Haldar S. Effect of peptide architecture on the self-assembly properties of tripeptide based anionic surfactants issued from two different peptide sequences: Ala-Ala-Val and Ala-Pro-Val in aqueous media (pH 7.4). Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.07.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Vijay R, Polavarapu PL. FMOC-Amino Acid Surfactants: Discovery, Characterization and Chiroptical Spectroscopy. J Phys Chem A 2012; 116:10759-69. [DOI: 10.1021/jp308134m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- R. Vijay
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United
States
| | - Prasad L. Polavarapu
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United
States
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19
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Affiliation(s)
- Prasad L. Polavarapu
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235,
United States
| | - R. Vijay
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235,
United States
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20
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QU Y, LIU X, ZHENG X, GUO Z. Preparation of Nafion-Ru(bpy) 32+-Chitosan/Gold Nanoparticles Composite Film and Its Electrochemiluminescence Application. ANAL SCI 2012; 28:571-6. [DOI: 10.2116/analsci.28.571] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yingjuan QU
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
| | - Xiaoli LIU
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
| | - Xingwang ZHENG
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
| | - Zhihui GUO
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
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21
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Fenske T, Korth HG, Mohr A, Schmuck C. Advances in Switchable Supramolecular Nanoassemblies. Chemistry 2011; 18:738-55. [DOI: 10.1002/chem.201102435] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Molecular aggregation and photochemical Z/E isomerization of 1-methy-2-[2-(9-phenantheryl)ethenyl] benzothiazolium iodide. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.06.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Shimomura M, Ando R, Kunitake T. Orientation and Spectral Characteristics of the Azobenzene Chromophore in the Ammonium Bilayer Assembly. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19830871211] [Citation(s) in RCA: 235] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Wang Y, Han P, Xu H, Wang Z, Zhang X, Kabanov AV. Photocontrolled self-assembly and disassembly of block ionomer complex vesicles: a facile approach toward supramolecular polymer nanocontainers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:709-715. [PMID: 19627165 DOI: 10.1021/la9023844] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A new concept of designing a photocontrollable supramolecular polymer nanocontainer through the electrostatic association between an azobenzene-containing surfactant (AzoC10) and a double-hydrophilic block ionomer, poly(ethylene glycol)-b-poly(acrylic acid) (PEG(43)-PAA(153)), is described. Such a block ionomer complex can self-assemble in aqueous solution and form vesicle-like aggregates, which are composed of a poly(ethylene glycol) corona and a poly(acrylic acid) shell associated with azobenzene-containing surfactant. The photoisomerization of azobenzene moieties in the block ionomer complex can reversibly tune the amphiphilicity of the surfactants, inducing the disassembly of the vesicles. Such block ionomer complex vesicles are further evaluated as nanocontainers capable to encapsulate and release guest solutes on demand controlled by light irradiation. For example, the vesicles encapsulating the fluorescein sodium display clear spherical images observed by fluorescence microscopy. However, such fluorescence-marked images disappear after releasing the solute from the vesicles triggered by the UV light. Such novel materials are of both basic and practical significance, especially as prospective nanocontainers for cargo delivery.
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Affiliation(s)
- Yapei Wang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry, Tsinghua University, Beijing 100084, PR China
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25
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Kusumoto KI, Yamashita S, Nagata T, Ido T, Hamachi I, Akao T. Thin-film assembly of diethanolamine-based lipidic material as potential gene carrier in mouse embryonic neural stem cells. J Biomed Mater Res A 2009; 91:1-10. [DOI: 10.1002/jbm.a.32159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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26
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Kusumoto KI. Structural features of glutamate-based lipidic materials for small interfering RNA delivery system. J Biomed Mater Res A 2009; 89:739-50. [DOI: 10.1002/jbm.a.32026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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27
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Xu W, Wang Y, Xiao Y, Liu F, Lu GY. Langmuir monolayer and Langmuir-Blodgett films formed by a melamine-headed azobenzene-derived amphiphile: interfacial assembly affected by host-guest interaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:3646-3651. [PMID: 19708147 DOI: 10.1021/la8039708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel azobenzene-derived amphiphile with a melamine head, 2Azo-2C12H2-melamine, has been synthesized. pi-A isotherm measurements displayed that this amphiphile is able to form a stable Langmuir monolayer on both pure water and barbituric acid (BA)- or thymine (T)-containing subphases. The collapse surface pressure and limiting molecular area of its Langmuir monolayer on pure water are 40 mN/m and 0.56 nm2, respectively. However, when barbituric acid or thymine was introduced into the subphase, the corresponding pi-A isotherms of the monolayers exhibited a lower collapse surface pressure (22 mN/m for BA, 21 mN/m for T) and smaller limiting molecular area (0.54 nm2 for BA and 0.52 nm2 for T). UV-vis and FT-IR studies of the LB films formed by 2Azo-2C12H25-melamine have also been carried out. The results indicated that the LB films of 2Azo-2C12H25-melamine deposited from pure water undergo distinct collapse of the H-aggregate upon UV irradiation, while the LB films deposited from a BA- or T-containing subphase retain the H-aggregate. The host-guest-interaction-induced blockage of azobenzene photoisomerization should be responsible for the stabilized H-aggregate. A 1:1 host/guest binding mode to form a linear supramolecular polymeric chain has been proposed in the Langmuir monolayers formed on a BA- or T-containing subphase. The current results suggest that the host-guest interaction should be an effective means to manipulate the interfacial assembly of azobenzene-derived amphiphiles.
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Affiliation(s)
- Weihong Xu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
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Ahmad RK, Faure D, Goddard P, Oda R, Bassani DM. Photosensitive vesicles from a cis-azobenzene gemini surfactant show high photoresponse. Org Biomol Chem 2009. [DOI: 10.1039/b904390j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kameta N, Minamikawa H, Masuda M, Mizuno G, Shimizu T. Controllable biomolecule release from self-assembled organic nanotubes with asymmetric surfaces: pH and temperature dependence. SOFT MATTER 2008; 4:1681-1687. [PMID: 32907162 DOI: 10.1039/b803742f] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The release behavior of fluorescent dyes, oligo DNAs and spherical proteins from self-assembled organic nanotubes having 7-9 nm inner diameters has been studied in terms of novel nanocontainers with high-axial ratios. Both much smaller inner diameters and asymmetric inner and outer surfaces are characteristic of the nanotubes. The acid-dissociation constant (pKa) of the amino groups located at the inner surface and the thermal phase transition temperature (Tg-l) of the nanotube were evaluated based on the pH titration and variable-temperature circular dichroism (CD) spectroscopic experiments, respectively. Each guest was slowly released from both open ends of the nanotube under weak alkaline conditions (pH 8.5), as a result of the decrease in electrostatic attraction between the inner surface and the guests. Elevated temperatures above the obtained Tg-l converted the monolayer membrane of the nanotube from a solid state to a fluid one, promoting the remarkably fast release of the guests. The unique release properties of the nanotube as a nanocontainer with two terminal open ends were compared with those of liposomes that posses a closed hollow space covered with fluid bilayer membranes.
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Affiliation(s)
- Naohiro Kameta
- SORST, Japan Science and Technology Agency (JST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Hiroyuki Minamikawa
- SORST, Japan Science and Technology Agency (JST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. and Nanoarchitectonics Research Center (NARC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Mitsutoshi Masuda
- SORST, Japan Science and Technology Agency (JST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. and Nanoarchitectonics Research Center (NARC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Go Mizuno
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Toshimi Shimizu
- SORST, Japan Science and Technology Agency (JST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. and Nanoarchitectonics Research Center (NARC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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30
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Uda RM, Tanabe T, Nakahara Y, Kimura K. Photoinduced micelle-to-vesicle transition and encapsulation of by photoresponsive Malachite Green derivative. SOFT MATTER 2008; 4:560-563. [PMID: 32907221 DOI: 10.1039/b716640k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
UV irradiation on a Malachite Green leuconitrile derivative afforded a cationic surfactant in aqueous solutions of sodium bis(2-ethylhexyl) sulfosuccinate. The result involved a micelle-to-vesicle transition and encapsulation which have been investigated by trapping experiment. Transmission electron microscopy was applied for direct observation of vesicle formation. The micellar solution was studied under dark conditions with pyrene emission spectra.
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Affiliation(s)
- Ryoko M Uda
- Department of Chemical Engineering, Nara National College of Technology, Yata 22, Yamato-koriyama, Nara 639-1080, Japan.
| | - Tomoyuki Tanabe
- Department of Chemical Engineering, Nara National College of Technology, Yata 22, Yamato-koriyama, Nara 639-1080, Japan.
| | - Yoshio Nakahara
- Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University, Sakae-dani 930, Wakayama 640-8510, Japan.
| | - Keiichi Kimura
- Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University, Sakae-dani 930, Wakayama 640-8510, Japan.
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31
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Uda RM, Yamashita D, Sakurai Y, Kimura K. Photoinduced increase in vesicle size and role of photoresponsive malachite green leuconitrile derivative in vesicle fusion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:7936-41. [PMID: 17590028 DOI: 10.1021/la700831z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The influence of photoirradiation on vesicles containing a Malachite Green leuconitrile derivative carrying a long alkyl chain, affording photogenerated amphiphilicity, was investigated. The photoresponsive Malachite Green leuconitrile derivative was embedded in the vesicle bilayer of two single-tailed amphiphiles with oppositely charged head groups consisting of cetyltrimethylammonium chloride (CTAC) and sodium octyl sulfate (SOS). Transmission electron microscopy, which was used for observing photoinduced structural change in the vesicles, demonstrated that photoirradiation of the vesicles containing the Malachite Green leuconitrile derivative increased the average size of the vesicle diameter from 116 to 243 nm in the [CTAC]/[SOS] = 0.48 system. The mechanism for vesicle enlargement was studied with fluorescent probe molecules. The photoinduced change in the vesicle size can be explained by the destabilization of the vesicle bilayer, which is perturbed by photogenerated amphiphilicity. In addition, it was shown that the fusion process arising from the destabilized bilayer contributed to the increase in vesicle size.
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Affiliation(s)
- Ryoko M Uda
- Department of Chemical Engineering, Nara National College of Technology, Yata 22, Yamato-koriyama, Nara 639-1080, Japan
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Uda RM, Kimura K. Photochemical micelle control by long-alkyl-chain Malachite Green. J PHYS ORG CHEM 2007. [DOI: 10.1002/poc.1178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Microscopic location of photosensitive Malachite Green surfactant in mixed micelle and its photoinduced enhancement of solubilizing power. Colloid Polym Sci 2006. [DOI: 10.1007/s00396-006-1620-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Electrochemiluminescent monolayers on metal oxide electrodes: Detection of amino acids. Electrochem commun 2006. [DOI: 10.1016/j.elecom.2006.07.022] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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36
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Kusumoto KI, Akao T, Mizuki E, Nakamura O. Gene transfer effects on various cationic amphiphiles in CHO cells. Cytotechnology 2006; 51:57-66. [PMID: 19002896 DOI: 10.1007/s10616-006-9014-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Accepted: 06/30/2006] [Indexed: 11/29/2022] Open
Abstract
Gene transfer is an important tool to explore genomic, cell biologic, or gene therapeutic research. In this paper we report that several cationic amphiphiles have the potential to efficiently deliver DNA into CHO cells, which is one of the cell lines considered to be important for production of proteins including therapeutic proteins. We have found that O,O'-ditetradecanoyl-N-(trimethylammonio acetyl) diethanolamine chloride (14Dea2), among 29 types of cationic amphiphiles tested, shows a transfection efficiency of more than 40% in CHO cells. In addition, the results from a series of hydrocarbon chains of varying lengths bound to a connector have shown that an optimal chain length is important for the efficient delivery of DNA into cells. Moreover, flow cytometer analysis has shown that 14Dea2 transfection leads to high levels of expression of the reporter gene (green fluorescent protein) in individual cells. These findings have suggested that 14Dea2 is able to effectively deliver a number of plasmids into a cell nucleus. Thus, our system might be a powerful tool for high efficiency gene transfer and production of high levels of recombinant protein.
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Affiliation(s)
- Ken-Ichi Kusumoto
- Biotechnology and Food Research Institute, Fukuoka Industrial Technology Center, 1465-5 Aikawa Kurume, Fukuoka, 839-0861, Japan,
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37
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Iwaura R, Shimizu T. Reversible Photochemical Conversion of Helicity in Self-Assembled Nanofibers from a 1,ω-Thymidylic Acid Appended Bolaamphiphile. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200601173] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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38
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Iwaura R, Shimizu T. Reversible Photochemical Conversion of Helicity in Self-Assembled Nanofibers from a 1,ω-Thymidylic Acid Appended Bolaamphiphile. Angew Chem Int Ed Engl 2006; 45:4601-4. [PMID: 16791899 DOI: 10.1002/anie.200601173] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rika Iwaura
- Nanoarchitectonics Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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39
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Mani NS, Mapes CM, Wu J, Deng X, Jones TK. Stereoselective Synthesis of Z-α-Aryl-α,β-unsaturated Esters. J Org Chem 2006; 71:5039-42. [PMID: 16776544 DOI: 10.1021/jo060586t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient method for the stereoselective synthesis of (Z)-alpha-arylacrylates is described. Treatment of alpha-hydroxyesters with triflic anhydride and pyridine at 0 degrees C followed by warming to room temperature afforded the corresponding (Z)-alpha-aryl-alpha,beta-unsaturated esters in very good yields and excellent stereoselectivity.
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Affiliation(s)
- Neelakandha S Mani
- Department of Drug Discovery, Johnson & Johnson Pharmaceutical Research and Development, L.L.C., 3210 Merryfield Row, San Diego, California 92121, USA.
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40
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Yagai S, Iwashima T, Kishikawa K, Nakahara S, Karatsu T, Kitamura A. Photoresponsive Self-Assembly and Self-Organization of Hydrogen-Bonded Supramolecular Tapes. Chemistry 2006; 12:3984-94. [PMID: 16550621 DOI: 10.1002/chem.200501468] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Self-assembling building blocks that are readily functionalizable and capable of achieving programmed hierarchical organization have enabled us to create various functional nanomaterials. We have previously demonstrated that N,N'-disubstituted 4,6-diaminopyrimidin-2(1 H)-one (DAP), a guanine-cytosine hybridized molecule, is a versatile building block for the creation of tapelike supramolecular polymer species in solution. In the current study, DAP was functionalized with azobenzene side chains. 1H NMR, UV/Vis, and dynamic light scattering studies confirmed the presence of nanometer-scale tapelike supramolecular polymers in alkane solvents at micromolar regimes. At higher concentrations (millimolar regimes), the supramolecular polymers hierarchically organized into lamellar superstructures to form organogels, as shown by X-ray diffraction and polarized optical microscopy. Remarkably, the azobenzene side chains are photoisomerizable even in the supramolecular polymers, owing to their loosely packed state supported by the rigid hydrogen-bonded scaffold, enabling us to establish photocontrollable supramolecular polymerization and higher order organization of the tapelike supramolecular polymers into lamellar superstructures.
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Affiliation(s)
- Shiki Yagai
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho, Chiba 263-8522, Japan.
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41
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Sagawa T, Chowdhury S, Takafuji M, Ihara H. Self-Assembled Nanofibrillar Aggregates with Amphiphilic and Lipophilic Molecules. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/masy.200650504] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Dennany L, Hogan CF, Keyes TE, Forster RJ. Effect of Surface Immobilization on the Electrochemiluminescence of Ruthenium-Containing Metallopolymers. Anal Chem 2006; 78:1412-7. [PMID: 16503588 DOI: 10.1021/ac0513919] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The effect of surface confinement on the electrochemiluminescence (ECL) properties of metallopolymer [Ru(bpy)2(PVP)10]2+, where bpy is 2,2'-bipyridyl and PVP is poly(4-vinylpyridine), is reported. Immobilizing a luminescent material on an electrode surface can substantially modulate its photophysical properties. Significantly, our study revealed that the overall efficiency of the ECL reaction for the metallopolymer film is almost four times higher, at 0.15%, than the highest value obtained for [Ru(bpy)2(PVP)10]2+ dissolved in solution, (phi(ECL) = 0.04%). Electrochemistry has been used to create well-defined concentrations of the quencher Ru3+ within the film. Analysis of both the steady-state luminescence and lifetimes of the film reveals that static quenching by electron transfer between the photoexcited Ru2+ and the Ru3+ centers is the dominant quenching mechanism. The bimolecular rate of electron transfer is (2.5 +/- 0.4) x 10(6) M(-1) s(-1). The implications of these findings for ECL-based sensors, in terms of optimum luminophore loading, is considered.
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Affiliation(s)
- Lynn Dennany
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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43
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Paradies HH. Bestimmung der Struktur von Dimethyldioctadecylammoniumchlorid-Vesikeln in Lösung durch Röntgen-Kleinwinkelstreuung; reversibler Phasenübergang. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.19820941023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Roy S, Dey J. Self-Organization Properties and Microstructures of SodiumN-(11-Acrylamidoundecanoyl)-L-valinate and -L-threoninate in Water. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.59] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Eastoe J, Vesperinas A. Self-assembly of light-sensitive surfactants. SOFT MATTER 2005; 1:338-347. [PMID: 32646100 DOI: 10.1039/b510877m] [Citation(s) in RCA: 195] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This review covers recent advances with an intriguing class of functionalised light-sensitive surfactants. The main chemical classes are described, and the photo-responses in interfacial and aggregation systems are discussed.
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Affiliation(s)
- Julian Eastoe
- School of Chemistry, University of Bristol, Bristol, UKBS8 1TS.
| | - Ana Vesperinas
- School of Chemistry, University of Bristol, Bristol, UKBS8 1TS.
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46
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Grinberg S, Linder C, Kolot V, Waner T, Wiesman Z, Shaubi E, Heldman E. Novel cationic amphiphilic derivatives from vernonia oil: synthesis and self-aggregation into bilayer vesicles, nanoparticles, and DNA complexants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:7638-45. [PMID: 16089364 DOI: 10.1021/la050091j] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Self-assembling nanostructures were prepared from novel cationic amphiphilic compounds synthesized from vernonia oil, a natural epoxydized triglyceride. The presence of a 12,13-epoxy group on the C18 unsaturated fatty acid, vernolic acid, which is the main constituent of vernonia oil, permitted the synthesis of novel amphiphilic derivatives with a hydrogen-bonding hydroxyl and a cationic headgroup moiety on adjacent carbon atoms. The amphiphiles were prepared in a two-stage synthesis that comprised opening of the epoxy groups with a haloacetic acid, followed by quaternization of the halo group with a tertiary amine containing a C12 aliphatic chain. Intact vernonia oil as the starting material gave a triple-headed cationic amphiphile, containing three vernolic acid derived moieties connected through a glycerol backbone. A single-headed amphiphile with two alkyl chains and a single quaternary ammonium headgroup was synthesized from the methyl ester of vernolic acid as the starting material. The triple-headed derivative could form nonencapsulating structures. Cholesterol was required in the formulation (1:1) to make spherical vesicles that could encapsulate a water-soluble marker. The single-headed derivative, however, formed spherical encapsulating vesicles without cholesterol. TEM, NMR, and FT-IR were used to characterize the vesicles, and molecular structure vs morphology relationships were postulated on the basis of these data. The triple-headed amphiphile also formed a DNA complex that was highly resistant to hydrolysis by DNase. This amphiphile-DNA complex was used as vector for gene transfer in cell culture demonstrating efficient DNA transfection.
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Affiliation(s)
- S Grinberg
- The Institutes for Applied Research, and The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
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47
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Eastoe J, Sanchez Dominguez M, Wyatt P, Orr-Ewing AJ, Heenan RK. UV causes dramatic changes in aggregation with mixtures of photoactive and inert surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:6120-6126. [PMID: 15248693 DOI: 10.1021/la0496486] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Aqueous mixtures of photosensitive and inert surfactants have been prepared; photoreactions and changes in aggregation after irradiation have been characterized. The photosensitive component was a stilbene-containing gemini photosurfactant (E-SGP), and the inert surfactants were either DTAB (dodecyltrimethylammonium bromide) or one of two different gemini surfactants, 12-4-12 or 16-4-16 (butanediyl-1,4-bis(dodecyldimethylammonium bromide) or butanediyl-1,4-bis(hexadecyldimethylammonium bromide)). Small-angle neutron scattering (SANS) studies revealed that in general the initial nonirradiated mixed systems form vesicle-type aggregates (100-200 angstroms radius), in equilibrium with some smaller charged spheroidal or ellipsoidal micelles (approximately 20 angstroms radius). In all cases, UV irradiation resulted in disruption of these vesicles and the formation of charged micelles. 1H NMR showed that the main photoproduct is the cis, anti, cis dimer of E-SGP (ZEZ-DiSGP); hence, photochemically induced changes in the reactive SGP drive significant changes in the preferred aggregation structure. These results demonstrate the utility of photoactive surfactants in mixtures with inert analogues.
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Affiliation(s)
- Julian Eastoe
- School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K.
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Kawasaki T, Tokuhiro M, Kimizuka N, Kunitake T. Hierarchical self-assembly of chiral complementary hydrogen-bond networks in water: reconstitution of supramolecular membranes. J Am Chem Soc 2001; 123:6792-800. [PMID: 11448183 DOI: 10.1021/ja010035e] [Citation(s) in RCA: 154] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spontaneous formation of complementary hydrogen-bond pairs and their hierarchical self-assembly (reconstitution) into chiral supramolecular membranes are achieved in water by mixing amphiphilic pairs of glutamate-derived melamine 6 and ammonium-derivatized azobenzene cyanuric acid 4. Electron microscopy is used to observe formation of helical superstructures, which are distinct from the aggregate structures observed for each of the single components in water. In addition, a spectral blue-shift and induced circular dichroism (ICD) with exciton coupling are observed for the pi-pi* absorption of the azobenzene chromophores. These observations are consistent with the reconstitution of the hydrogen-bond-mediated supramolecular membrane 6-4. Spectral titration experiments indicate the stoichiometric integration of the complementary subunits with an association constant of 1.13 x 10(5) M(-1). This value is considerably larger than those reported for the artificial hydrogen-bonding complexes in aqueous media. The remarkable reconstitution efficiency is ascribed to the hydrophobically driven self-organization of the amphiphilic, linear hydrogen-bond networks in water. Molecular structure of the complementary subunits plays an important role in the complexation process since it is restricted by the photoisomerized cis-azobenzene subunit. On the other hand, thermally regenerated trans-isomer 4 undergoes facile complexation with the counterpart 6. The present reconstitution of supramolecular membranes provides the first example of complementary hydrogen-bond-directed formation of soluble, mesoscopic supramolecular assemblies in water.
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Affiliation(s)
- T Kawasaki
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Higashi-ku, Fukuoka 812-8581, Japan
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49
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Nishimi T, Miller CA. Spontaneous Emulsification Produced by Chemical Reactions. J Colloid Interface Sci 2001; 237:259-266. [PMID: 11334541 DOI: 10.1006/jcis.2001.7467] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Spontaneous emulsification of small oil droplets was produced in three different systems by chemical reactions which converted lipophilic surfactants initially dissolved in the oil phase to hydrophilic surfactants. The resulting reversal of spontaneous curvature from a water-in-oil to an oil-in-water configuration reduced the solubilization capacity for oil to such an extent that supersaturation occurred, leading to nucleation of oil droplets. In one case a dilute solution of phenylboronic acid in water diffused into an oil phase containing a monoglyceride. The reaction converted the monoglyceride to an anionic surfactant. In another case a dilute aqueous solution of the sodium salt of EDTA diffused into an oil phase containing a calcium sulfonate surfactant. The EDTA complexed calcium ions, releasing sodium ions which formed the more hydrophilic sodium salt of the sulfonate. Finally, an enzyme was used to split a double-chain phospholipid into a lysolecithin and a fatty acid. Copyright 2001 Academic Press.
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Affiliation(s)
- Taisei Nishimi
- Department of Chemical Engineering, Rice University (MS 362), Houston, Texas, 77251-1892
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50
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OKUMURA S, AKAO T, KANEGAE H, MATSUO N, SUGANO M, YAMADA K. Adjuvant Activity of Synthetic Cationic Amphiphiles for Production of IgG Antibody in Sprague Dawley Rats. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2001. [DOI: 10.3136/fstr.7.67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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