1
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Wan X, Xiao J, Yin M, Yao Y, Luo J. Counterion-induced antibiotic-based small-molecular micelles for methicillin-resistant Staphylococcus aureus infections. Acta Biomater 2023; 166:627-639. [PMID: 37220819 DOI: 10.1016/j.actbio.2023.05.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 05/25/2023]
Abstract
A new counterion-induced small-molecule micelle (SM) with surface charge-switchable activities for methicillin-resistant Staphylococcus aureus (MRSA) infections is proposed. The amphiphilic molecule formed by zwitterionic compound and the antibiotic ciprofloxacin (CIP), via a "mild salifying reaction" of the amino and benzoic acid groups, can spontaneously assemble into counterion-induced SMs in water. Through vinyl groups designed on zwitterionic compound, the counterion-induced SMs could be readily cross-linked using mercapto-3, 6-dioxoheptane by click reaction, to create pH-sensitive cross-linked micelles (CSMs). Mercaptosuccinic acid was also decorated on the CSMs (DCSMs) by the same click reaction to afford charge-switchable activities, resulting in CSMs that were biocompatible with red blood cells and mammalian cells in normal tissues (pH 7.4), while having strong retention to negatively charged bacterial surfaces at infection sites, based on electrostatic interaction (pH 5.5). As a result, the DCSMs could penetrate deep into bacterial biofilms and then release drugs in response to the bacterial microenvironment, effectively killing the bacteria in the deeper biofilm. The new DCSMs have several advantages such as robust stability, a high drug loading content (∼ 30%), easy fabrication, and good structural control. Overall, the concept holds promise for the development of new products for clinical application. STATEMENT OF SIGNIFICANCE: We fabricated a new counterion-induced small-molecule micelle with surface charge-switchable activities (DCSMs) for methicillin-resistant Staphylococcus aureus (MRSA) infections. Compared with reported covalent systems, the DCSMs not only have improved stability, high drug loading content (∼ 30%), and good biosafety, but also have the environmental stimuli response, and antibacterial activity of the original drugs. As a result, the DCSMs exhibited enhanced antibacterial activities against MRSA both in vitro and in vivo. Overall, the concept holds promise for the development of new products for clinical application.
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Affiliation(s)
- Xiaohui Wan
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Jipeng Xiao
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Meihui Yin
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Yongchao Yao
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
| | - Jianbin Luo
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China.
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2
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Das A, Yadav N, Manchala S, Bungla M, Ganguli AK. Mechanistic Investigations of Growth of Anisotropic Nanostructures in Reverse Micelles. ACS OMEGA 2021; 6:1007-1029. [PMID: 33490761 PMCID: PMC7818115 DOI: 10.1021/acsomega.0c04033] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
Tailoring the characteristics of anisotropic nanostructures like size, morphology, aspect ratio, and size dispersity is of extreme importance due to the unique and tunable properties including catalytic, optical, photocatalytic, magnetic, photochemical, electrochemical, photoelectrochemical, and several other physical properties. The reverse microemulsion (RM) method offers a useful soft-template and low-temperature procedure that, by variation of experimental conditions and nature of reagents, has proved to be extremely versatile in synthesis of nanostructures with tailored properties. Although many reports of synthesis of nanostructures by the RM method exist in the literature, most of the research studies carried out still follow the "hit and trial" method where the synthesis conditions, reagents, and other factors are varied and the resulting characteristics of the obtained nanostructures are justified on the basis of existing physical chemistry principles. Mechanistic investigations are scarce to generate a set of empirical rules that would aid in preplanning the RM-based synthesis of nanostructures with desired characteristics as well as make the process viable on an industrial scale. A consolidation of such research data available in the literature is essential for providing future directions in the field. In this perspective, we analyze the literature reports that have investigated the mechanistic aspects of growth of anisotropic nanostructures using the RM method and distil the essence of the present understanding at the nanoscale timescale using techniques like FCS and ultrafast spectroscopy in addition to routine techniques like DLS, fluorescence, TEM, etc.
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Affiliation(s)
- Anirban Das
- Department
of Chemistry, Biochemistry and Forensic Sciences, Amity School of
Applied Sciences, Amity University Haryana, Gurugram, Haryana 122413, India
| | - Nitin Yadav
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Saikumar Manchala
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Manisha Bungla
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
| | - Ashok K. Ganguli
- Department
of Chemistry, Indian Institute of Technology
Delhi, Hauz Khas, New Delhi, Delhi 110016, India
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3
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Rajak A, Karan CK, Theato P, Das A. Supramolecularly cross-linked amphiphilic block copolymer assembly by the dipolar interaction of a merocyanine dye. Polym Chem 2020. [DOI: 10.1039/c9py01492f] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Dipolar interaction driven dimerization of a merocyanine (MC) dye has been exploited to achieve non-covalently crosslinked stable micelles in water and reverse micelles in toluene with emissive properties from a MC-pendant amphiphilic block copolymer.
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Affiliation(s)
- Aritra Rajak
- School of Applied and Interdisciplinary Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Chandan Kumar Karan
- School of Applied and Interdisciplinary Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Patrick Theato
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology (KIT)
- D-76131 Karlsruhe
- Germany
- Soft Matter Synthesis Laboratory
| | - Anindita Das
- School of Applied and Interdisciplinary Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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4
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Yao Y, Chen Y, Liu Y, Zhu Y, Liu Y, Zhang S. Facile Transfer of Reverse Micelles from the Organic to the Aqueous Phase for Mimicking Enzyme Catalysis and Imaging-Guided Cancer Therapy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5871-5877. [PMID: 30955338 DOI: 10.1021/acs.langmuir.9b00607] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Reverse micelles (RMs) with confined water pools have been applied in many fields. However, the water insolubility of RMs seriously limits the scope of their application, especially those needed to operate in aqueous environments. Here, we report the first successful transfer of RMs from the organic phase to water phase without disturbing their confined water pools and hydrophobic alkyl region. This transfer was achieved by virtue of a mild host-guest interaction between the hydrophobic tails of interfacial cross-linked reverse micelles (ICRMs) and the hydrophobic cavity of (2-hydroxypropyl)-β-cyclodextrin (HP-β-CD). Benefitting from the maintained confined water pools and the hydrophobic scaffold, the obtained water-soluble ICRMs served as multifunctional nanoplatforms for enzyme-mimicking catalysis and image-guided cancer therapy, which were impossible for normal RMs lacking water solubility or confined pool-buried water-soluble nanoparticles without a hydrophobic alkyl chain. This mild transfer approach thus surmounts the application obstacle of RMs and opens up new avenues for their application in aqueous environments.
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Affiliation(s)
| | | | - Yong Liu
- Collaborative Innovation Centre of Tissue Repair Material of Sichuan Province , China West Normal University , Nanchong 637009 , China
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5
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Zhang Z, Li K, Tian R, Lu C. Substrate-Assisted Visualization of Surfactant Micelles via Transmission Electron Microscopy. Front Chem 2019; 7:242. [PMID: 31032251 PMCID: PMC6470246 DOI: 10.3389/fchem.2019.00242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 03/26/2019] [Indexed: 11/30/2022] Open
Abstract
The visualization of the micellar morphological evolution for surfactant has drawn much attention due to its self-assemble ability to fold into various structures. However, the direct observation of the soft materials with low atomic number has been hampered because of the poor scattering contrast and complex staining process by the traditional transmission electron microscopy (TEM) techniques. Herein, we reported a novel strategy to the visualization of surfactant micelles with the assistance of layered double hydroxides (LDHs) via TEM. Owing to the uniformly distributed metal ions and positive charges in the LDHs, the surfactant at the micelle-water interface reacted with LDHs to form a stabilized architecture through electrostatic and hydrogen-bond interactions. The morphologies of the surfactant can be clearly observed through the surfactant-LDHs architectures, exhibiting high contrast by TEM techniques. Significantly, the micellar evolutions involving the spherical, rodlike, and wormlike shapes were successfully distinguished. Our results may provide great possibilities and inspirations for the visualization for morphology of soft matters.
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Mantel M, Guder M, Pietruszka J. Simple organocatalysts in multi-step reactions: An efficient one-pot Morita-Baylis-Hillman-type α-hydroxymethylation of vinyl ketones followed by the convenient, temperature-controlled one-pot etherification using alcohols. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.05.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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7
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Chen Y, Liu Y, Yao Y, Zhang S, Gu Z. Reverse micelle-based water-soluble nanoparticles for simultaneous bioimaging and drug delivery. Org Biomol Chem 2018; 15:3232-3238. [PMID: 28327735 DOI: 10.1039/c7ob00169j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
With special confined water pools, reverse micelles (RMs) have shown potential for a wide range of applications. However, the inherent water-insolubility of RMs hinders their further application prospects, especially for applications related to biology. We recently reported the first successful transfer of RMs from organic media to an aqueous phase without changing the smart water pools by the hydrolysis of an arm-cleavable interfacial cross-linked reverse micelles. Herein, we employed another elaborate amphiphile 1 to construct new acrylamide-based cross-linked water-soluble nanoparticles (ACW-NPs) under much gentler conditions. The special property of the water pools of the ACW-NPs was confirmed by both the Förster resonance energy transfer (FRET) between 5-((2-aminoethyl)amino)naphthalene-1-sulfonic acid (1,5-EDANS) and benzoic acid, 4-[2-[4-(dimethylamino)phenyl]diazenyl] (DABCYL) and satisfactory colloidal stability in 10% fetal bovine serum. Importantly, featured by the gentle synthetic strategy, confined water pool, and carboxylic acid-functionalized surface, the new ACW-NPs are well suitable for biological applications. As an example, the fluorescent reagent 8-hydroxy-1,3,6-pyrenetrisulfonic acid trisodium salt (HPTS) was encapsulated in the core and simultaneously, the anticancer drug gemcitabine (Gem) was covalently conjugated onto the surface exterior. As expected, the resulting multifunctional ACW-NPs@HPTS@Gem exhibits a high imaging effect and anticancer activity for non-small lung cancer cells.
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Affiliation(s)
- Ying Chen
- National Engineering Research Centre for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
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8
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Lee LC, Xing X, Zhao Y. Environmental Engineering of Pd Nanoparticle Catalysts for Catalytic Hydrogenation of CO 2 and Bicarbonate. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38436-38444. [PMID: 29028299 DOI: 10.1021/acsami.7b10591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The extraordinary catalytic properties of enzymes are derived not only from their catalytic groups but also the unique properties of the active site. Tuning the microenvironment of synthetic catalysts is expected to enhance their performance if effective strategies can be developed. Interfacially cross-linked reverse micelles were prepared from three different cross-linkable surfactants. Pd nanoparticles were deposited in the core of the micelle for the catalytic hydrogenation of bicarbonate and CO2. The catalytic performance was found to depend heavily on the nature of the headgroup of the surfactant. Quaternary ammonium-based surfactants through ion exchange could bring bicarbonate to the catalytic center, whereas tertiary amine-based surfactants worked particularly well in CO2 hydrogenation, with turnover numbers an order of magnitude higher than that of commercially available Pd/C. The amines were proposed to bring CO2 to the proximity of the catalysts through reversible formation of carbamate, in the nanospace of the hydrophilic core of the cross-linked reverse micelle. In the bicarbonate reduction, additional improvement of the catalysts was achieved through localized sol-gel synthesis that introduced metal oxide near the catalytic metal.
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Affiliation(s)
- Li-Chen Lee
- Department of Chemistry, Iowa State University , Ames, Iowa 50011-3111, United States
| | - Xiaoyu Xing
- Department of Chemistry, Iowa State University , Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University , Ames, Iowa 50011-3111, United States
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9
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Ding A, Xu J, Gu G, Lu G, Huang X. PHEA-g-PMMA Well-Defined Graft Copolymer: ATRP Synthesis, Self-Assembly, and Synchronous Encapsulation of Both Hydrophobic and Hydrophilic Guest Molecules. Sci Rep 2017; 7:12601. [PMID: 28974694 PMCID: PMC5626726 DOI: 10.1038/s41598-017-12710-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 09/18/2017] [Indexed: 02/03/2023] Open
Abstract
A series of well-defined amphiphilic graft copolymer bearing a hydrophilic poly(2-hydroxyethyl acrylate) (PHEA) backbone and hydrophobic poly(methyl methacrylate) (PMMA) side chains was synthesized by successive reversible addition-fragmentation chain transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP) through the grafting-from strategy. A well-defined PHEA-based backbone with Cl-containing ATRP initiating group in every repeated unit (Mw/Mn = 1.08), poly(2-hydroxyethyl 2-((2-chloropropanoyloxy)methyl)acrylate) (PHECPMA), was first prepared by RAFT homopolymerization of 2-hydroxyethyl 2-((2-chloropropanoyloxy)methyl)acrylate (HECPMA), a Cl-containing trifunctional acrylate. ATRP of methyl methacrylate was subsequently initiated by PHECPMA homopolymer to afford the target well-defined poly(2-hydroxyethyl acrylate)-graft-poly(methyl methacrylate) (PHEA-g-PMMA) graft copolymers (Mw/Mn ≤ 1.36) with 34 PMMA side chains and 34 pendant hydroxyls in PHEA backbone using CuCl/dHbpy as catalytic system. The critical micelle concentration (cmc) of the obtained graft copolymer was determined by fluorescence spectroscopy using N-phenyl-1-naphthylamine as probe while micellar morphologies in aqueous media were visualized by transmission electron microscopy. Interestingly, PHEA-g-PMMA graft copolymer could self-assemble into large compound micelles rather than common spherical micelles, which can encapsulate hydrophilic rhodamine 6 G and hydrophobic pyrene separately or simultaneously.
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Affiliation(s)
- Aishun Ding
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China.,Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China
| | - Jie Xu
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China
| | - Guangxin Gu
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China.
| | - Guolin Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China.
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10
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Liu Y, Chen Y, Yao Y, Luo K, Zhang S, Gu Z. Confined Pool-Buried Water-Soluble Nanoparticles from Reverse Micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5275-5282. [PMID: 28505441 DOI: 10.1021/acs.langmuir.7b00890] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
With the special nature of confined water pools, reverse micelles (RMs) have shown potential for a wide range of applications. However, the inherent water insolubility of RMs hinders their further application prospect especially for applications related to biology. We present herein the first successful transformation of water-insoluble RMs into water-soluble nanoparticles without changing the confined aqueous interiors by hydrolysis/aminolysis of arm-cleavable interfacial cross-linked reverse micelles formed from diester surfactant 1. The unique properties exhibited by the aqueous interiors of the resulting pool-buried water-soluble nanoparticles (PWNPs) were demonstrated both by the template synthesis of gold nanoparticles in the absence of external reductants and by the fluorescence enhancement of encapsulated thioflavin T (ThT). Importantly, the unique potential for PWNPs in biological applications was exemplified by the use of ThT@PWNPs and "cell targeted" ThT@PWNPs as effective optical imaging agents of living cells. This work conceptually overcomes the application bottleneck of RMs and opens an entry to a new class of functional materials.
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Affiliation(s)
- Yong Liu
- National Engineering Research Center for Biomaterials and ‡College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
| | - Ying Chen
- National Engineering Research Center for Biomaterials and ‡College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
| | - Yongchao Yao
- National Engineering Research Center for Biomaterials and ‡College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
| | - Kui Luo
- National Engineering Research Center for Biomaterials and ‡College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
| | - Shiyong Zhang
- National Engineering Research Center for Biomaterials and ‡College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
| | - Zhongwei Gu
- National Engineering Research Center for Biomaterials and ‡College of Chemistry, Sichuan University , 29 Wangjiang Road, Chengdu 610064, China
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11
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Sun F, Lu G, Feng C, Li Y, Huang X. A PHEA-g-PEO well-defined graft copolymer exhibiting the synchronous encapsulation of both hydrophobic pyrene and hydrophilic Rhodamine 6G. Polym Chem 2017. [DOI: 10.1039/c6py01595f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article reports the synthesis of a well-defined PHEA-g-PEO graft copolymer by the combination of RAFT polymerization, Cu(i)-mediated ATNRC, and the grafting-onto strategy, which could encapsulate hydrophilic R6G and hydrophobic pyrene simultaneously.
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Affiliation(s)
- Fangxu Sun
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Guolin Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Chun Feng
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Yongjun Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
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12
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Xu B, Yao W, Li Y, Zhang S, Huang X. Perfluorocyclobutyl Aryl Ether-Based ABC Amphiphilic Triblock Copolymer. Sci Rep 2016; 6:39504. [PMID: 28000757 PMCID: PMC5175170 DOI: 10.1038/srep39504] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 11/23/2016] [Indexed: 11/09/2022] Open
Abstract
A series of fluorine-containing amphiphilic ABC triblock copolymers comprising hydrophilic poly(ethylene glycol) (PEG) and poly(methacrylic acid) (PMAA), and hydrophobic poly(p-(2-(4-biphenyl)perfluorocyclobutoxy)phenyl methacrylate) (PBPFCBPMA) segments were synthesized by successive atom transfer radical polymerization (ATRP). First, PEG-Br macroinitiators bearing one terminal ATRP initiating group were prepared by chain-end modification of monohydroxy-terminated PEG via esterification reaction. PEG-b-PBPFCBPMA-Br diblock copolymers were then synthesized via ATRP of BPFCBPMA monomer initiated by PEG-Br macroinitiator. ATRP polymerization of tert-butyl methacrylate (tBMA) was directly initiated by PEG-b-PBPFCBPMA-Br to provide PEG-b-PBPFCBPMA-b-PtBMA triblock copolymers with relatively narrow molecular weight distributions (Mw/Mn ≤ 1.43). The pendant tert-butyoxycarbonyls were hydrolyzed to carboxyls in acidic environment without affecting other functional groups for affording PEG-b-PBPFCBPMA-b-PMAA amphiphilic triblock copolymers. The critical micelle concentrations (cmc) were determined by fluorescence spectroscopy using N-phenyl-1-naphthylamine as probe and the self-assembly behavior in aqueous media were investigated by transmission electron microscopy. Large compound micelles and bowl-shaped micelles were formed in neutral aqueous solution. Interestingly, large compound micelles formed by triblock copolymers can separately or simultaneously encapsulate hydrophilic Rhodamine 6G and hydrophobic pyrene agents.
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Affiliation(s)
- Binbin Xu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Wenqiang Yao
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Yongjun Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Sen Zhang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
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13
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Xu B, Gu G, Feng C, Jiang X, Hu J, Lu G, Zhang S, Huang X. (PAA-g-PS)-co-PPEGMEMA asymmetric polymer brushes: synthesis, self-assembly, and encapsulating capacity for both hydrophobic and hydrophilic agents. Polym Chem 2016. [DOI: 10.1039/c5py01644d] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(PAA-g-PS)-co-PPEGMEMA asymmetric polymer brushes formed large compound micelles in aqueous media for encapsulating both hydrophobic pyrene and hydrophilic Rhodamine 6G.
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Affiliation(s)
- Binbin Xu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Guangxin Gu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Chun Feng
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Xue Jiang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Jianhua Hu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Guolin Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Sen Zhang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
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14
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Souza FD, Souza BS, Tondo DW, Leopoldino EC, Fiedler HD, Nome F. Imidazolium-based zwitterionic surfactants: characterization of normal and reverse micelles and stabilization of nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:3587-3595. [PMID: 25742026 DOI: 10.1021/la504802k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper presents the physicochemical properties of micellar aggregates formed from a series of zwitterionic surfactants of the type 3-(1-alkyl-3-imidazolio)propane-sulfonate (ImS3-n), with n = 10, 12, 14, and 16. The ImS3-n dipolar ionic surfactants represent a versatile class of dipolar ionic compounds, which form normal and reverse micelles. Furthermore, they are able to stabilize nanoparticles in water and in organic media. Aqueous solubility is too low at room temperature to allow characterization of micellar aggregates but increases with addition of salts, allowing determination of aggregation number and cmc. As expected, these parameters depend on the length of the alkyl chain, and cmc values follow Klevens equation. In the presence of NaClO4, all ImS3-n micelles become anionoid by incorporating ClO4(-) on the micellar interface. A special feature of these surfactants is the ability to form reverse micelles and solubilize copious amounts of saline solutions in chloroform. (1)H NMR and infrared spectroscopic evidence showed that the maximum water to surfactant molar ratio w0 achievable depends on the concentration and type of salt dissolved. Reverse micelles of the ImS3-n surfactants can be used to stabilize metallic nanoparticles, whose size may be tuned by the amount of water dissolved.
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Affiliation(s)
- Franciane D Souza
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Bruno S Souza
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Daniel W Tondo
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Elder C Leopoldino
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Haidi D Fiedler
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Faruk Nome
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
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15
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Lee LC, Xiao C, Huang W, Zhao Y. Palladium–gold bimetallic nanoparticle catalysts prepared by “controlled release” from metal-loaded interfacially cross-linked reverse micelles. NEW J CHEM 2015. [DOI: 10.1039/c4nj01905a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bimetallic Pd–Au nanoparticles prepared by a novel method were active catalysts for green oxidation of alcohol in water.
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Affiliation(s)
- Li-Chen Lee
- Department of Chemistry
- Iowa State University
- Ames
- USA
| | | | - Wenyu Huang
- Department of Chemistry
- Iowa State University
- Ames
- USA
| | - Yan Zhao
- Department of Chemistry
- Iowa State University
- Ames
- USA
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16
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Atkinson MBJ, Oyola-Reynoso S, Luna RE, Bwambok DK, Thuo MM. Pot-in-pot reactions: a simple and green approach to efficient organic synthesis. RSC Adv 2015. [DOI: 10.1039/c4ra13506g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple, flux controlled, technique to circumvent the tedium and wastage in organic synthesis is review. Pot-in-pot reactions, like matryoshka dolls, houses one reaction pot inside another.
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Affiliation(s)
| | - S. Oyola-Reynoso
- Department of Materials Science and Engineering
- Iowa State University
- Ames
- USA
| | - R. E. Luna
- Department of Biological Chemistry and Molecular Pharmacology
- Harvard Medical School
- Boston
- USA
| | - D. K. Bwambok
- Warner Babcock Institute for Green Chemistry
- Wilmington
- USA
| | - M. M. Thuo
- Department of Materials Science and Engineering
- Iowa State University
- Ames
- USA
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17
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Triple stimuli-responsive polymers based on pyrene-functionalized poly(dimethylaminoethyl methacrylate): synthesis, self-assembled nanoparticles and controlled release. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3358-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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18
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Li QL, Gu WX, Gao H, Yang YW. Self-assembly and applications of poly(glycidyl methacrylate)s and their derivatives. Chem Commun (Camb) 2014; 50:13201-15. [DOI: 10.1039/c4cc03036b] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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19
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Feng N, Han G, Dong J, Wu H, Zheng Y, Wang G. Nanoparticle assembly of a photo- and pH-responsive random azobenzene copolymer. J Colloid Interface Sci 2014; 421:15-21. [PMID: 24594026 DOI: 10.1016/j.jcis.2014.01.036] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/05/2014] [Accepted: 01/25/2014] [Indexed: 11/18/2022]
Abstract
Stimuli-responsive polymeric nanoparticles with a core of hydrophobic azobenzene-containing acrylate units and a shell of hydrophilic acrylic acid units were prepared from a novel photo- and pH-responsive amphiphilic random azobenzene copolymer. Upon UV light irradiation, the trans azobenzene changed to the cis form and thus the water contact angle and the absorption of water on the polymer film could be changed, while little effect was exerted on the morphology of the nanoparticles although the polarity of the core of nanoparticles increased. Adjusting pH of the nanoparticle solution could exert a strong effect on the morphology of the nanoparticles. The prime nanoparticles (pH 6) changed to nanoparticle aggregates at pH 3, and to swollen nanoparticles at pH 11. The controlled release of Nile Red from the nanoparticles under the stimuli was demonstrated.
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Affiliation(s)
- Ning Feng
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Guoxiang Han
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jie Dong
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Hao Wu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yudong Zheng
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Guojie Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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20
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Feng N, Dong J, Han G, Wang G. Polymer Nanoparticles Based on Pyrene-Functionalized Poly(acrylic acid) for Controlled Release under Photo and pH Stimulation. Macromol Rapid Commun 2014; 35:721-6. [DOI: 10.1002/marc.201300863] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Revised: 01/13/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Ning Feng
- School of Materials Science and Engineering; University of Science and Technology Beijing; Beijing 100083 China
| | - Jie Dong
- School of Materials Science and Engineering; University of Science and Technology Beijing; Beijing 100083 China
| | - Guoxiang Han
- School of Materials Science and Engineering; University of Science and Technology Beijing; Beijing 100083 China
| | - Guojie Wang
- School of Materials Science and Engineering; University of Science and Technology Beijing; Beijing 100083 China
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21
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Liu R, Wang S, Yao J, Xu W, Li H. Cross-linked reverse micelles with embedded water pools: a novel catalytic system based on amphiphilic block copolymers. RSC Adv 2014. [DOI: 10.1039/c4ra04358h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The shell cross-linked reverse micelles were used as a more reactive and recoverable catalytic system.
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Affiliation(s)
- Ruihan Liu
- State Key Laboratory of Chemical Engineering
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027, PR. China
| | - Shiping Wang
- Key Lab of Applied Chemistry of Zhejiang Province
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027, PR. China
| | - Jia Yao
- State Key Laboratory of Chemical Engineering
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027, PR. China
| | - Weiwei Xu
- State Key Laboratory of Chemical Engineering
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027, PR. China
| | - Haoran Li
- State Key Laboratory of Chemical Engineering
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027, PR. China
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22
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Xiang F, Stuart M, Vorenkamp J, Roest S, Timmer-Bosscha H, Stuart MC, Fokkink R, Loontjens T. One-Pot Synthesis for Biocompatible Amphiphilic Hyperbranched Polyurea Micelles. Macromolecules 2013. [DOI: 10.1021/ma400552x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Fei Xiang
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen,
The Netherlands
| | - Marc Stuart
- Groningen Biomolecular Sciences and Biotechnology
Institute, University of Groningen, Nijenborgh
7, 9747 AG Groningen, The Netherlands
| | - Joop Vorenkamp
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen,
The Netherlands
| | - Steven Roest
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen,
The Netherlands
| | - Hetty Timmer-Bosscha
- Department
of Medical Oncology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Martien Cohen Stuart
- Laboratory of Physical Chemistry and Colloid Science, University of Wageningen, Droevendaalsesteeg 4, 6708PB,
Wageningen, The Netherlands
| | - Remco Fokkink
- Laboratory of Physical Chemistry and Colloid Science, University of Wageningen, Droevendaalsesteeg 4, 6708PB,
Wageningen, The Netherlands
| | - Ton Loontjens
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen,
The Netherlands
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23
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Wu Y, Hu H, Hu J, Liu T, Zhang G, Liu S. Thermo- and light-regulated formation and disintegration of double hydrophilic block copolymer assemblies with tunable fluorescence emissions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3711-3720. [PMID: 23425211 DOI: 10.1021/la400145f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report on thermo- and light-regulated formation and disintegration of double hydrophilic block copolymer (DHBC) micelles associated with tunable fluorescence emissions by employing two types of DHBCs covalently labeled with fluorescence resonance energy transfer (FRET) donor and acceptor moieties, respectively, within the light and temperature dually responsive block. Both DHBCs are molecularly soluble at room temperature in their aqueous mixture, whereas, upon heating to above the critical micellization temperature (CMT, ~31 °C), they coassemble into mixed micelles possessing hydrophilic coronas and mixed cores containing FRET donors and acceptors. Accordingly, the closer spatial proximity between the FRET pair (NBDAE and RhBEA moieties) within micellar cores leads to substantially enhanced FRET efficiency, compared to that in the non-aggregated unimer state. Moreover, upon UV irradiation, the light-reactive moieties undergo light-cleavage reaction and transform into negatively charged carboxylate residues, leading to elevated CMT (∼46 °C). Thus, thermo-induced mixed micelles in the intermediate temperature range (31 °C < T < 46 °C) undergo light-triggered disintegration into unimers, accompanied with the decrease of FRET efficiency. Overall, the coassembly and disassembly occurring in the mixed DHBC solution can be dually regulated by temperature and UV irradiation, and most importantly, these processes can be facilely monitored via changes in FRET efficiency and distinct emission colors.
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Affiliation(s)
- Yonghao Wu
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
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24
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Longstreet AR, McQuade DT. Organic reaction systems: using microcapsules and microreactors to perform chemical synthesis. Acc Chem Res 2013; 46:327-38. [PMID: 23072456 DOI: 10.1021/ar300144x] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The appetite for complex organic molecules continues to increase worldwide, especially in rapidly developing countries such as China, India, and Brazil. At the same time, the cost of raw materials and solvent waste disposal is also growing, making sustainability an increasingly important factor in the production of synthetic life-saving/improving compounds. With these forces in mind, our group is driven by the principle that how we synthesize a molecule is as important as which molecule we choose to synthesize. We aim to define alternative strategies that will enable more efficient synthesis of complex molecules. Drawing our inspiration from nature, we attempt to mimic (1) the multicatalytic metabolic systems within cells using collections of nonenzyme catalysts in batch reactors and (2) the serial synthetic machinery of fatty acid/polyketide biosynthesis using microreactor systems. Whether we combine catalysts in batch to prepare an active pharmaceutical ingredient (API) or use microreactors to synthesize small or polymeric molecules, we strive to understand the mechanism of each reaction while also developing new methods and techniques. This Account begins by examining our early efforts in the development of novel catalytic materials and characterization of catalytic systems and how these observations helped forge our current models for developing efficient synthetic routes. The Account progresses through a focused examination of design principles needed to develop multicatalyst systems using systems recently published by our group as examples. Our systems have been successfully applied to produce APIs as well as new synthetic methods. The multicatalyst section is then juxtaposed with our work in continuous flow multistep synthesis. Here, we discuss the design principles needed to create multistep continuous processes using examples from our recent efforts. Overall, this Account illustrates how multistep organic routes can be conceived and achieved using strategies and techniques that mimic biological systems.
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Affiliation(s)
- Ashley R. Longstreet
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - D. Tyler McQuade
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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25
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Li L, Wang ML, Chen Y, Jiang SC. Multifunctional covalently stabilized vesicles acting simultaneously as the template of gold nanoparticle cluster and the nanocarrier of guest molecules. J Colloid Interface Sci 2012; 387:146-52. [DOI: 10.1016/j.jcis.2012.08.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Revised: 08/02/2012] [Accepted: 08/03/2012] [Indexed: 10/28/2022]
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26
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Lee LC, Zhao Y. Interfacially Cross-Linked Reverse Micelles as Soluble Support for Palladium Nanoparticle Catalysts. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201100451] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Zhang S, Zhao Y. Template synthesis of subnanometer gold clusters in interfacially cross-linked reverse micelles mediated by confined counterions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3606-3613. [PMID: 22263584 DOI: 10.1021/la204694c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A cationic surfactant with a triallylammonium headgroup was cross-linked photochemically in the presence of a hydrophilic dithiol in the reverse micelle (RM) configuration. The interfacially cross-linked reverse micelles (ICRMs) are unusual templates for nanomaterials synthesis. Our previous work indicated that the ICRMs could extract anionic metal salts such as tetracholoroaurate into the hydrophilic interior, and the entrapped aurate was reduced without externally added reducing agent to form subnanometer luminescent gold clusters [Zhang, S.; Zhao, Y. ACS Nano 2011, 5, 2637-2646]. In this work, the bromide counterions were established as the reducing agent in the template synthesis. The reduction of tetrachloroaurate was proposed to happen through ligand exchange on the aurate by the bromide ions, reductive elimination of halogen, and disproportionation of the Au(I) intermediate. The size of the gold clusters could be tuned rationally by the water-to-surfactant ratio (W(0)) and the reducing agent. Monodisperse Au(4) and Au(9-10) clusters as well as larger Au(18) and Au(23) clusters were obtained from the ICRM templates. The as-prepared, metastable gold clusters were subject to reconstruction triggered by ligand exchange on the surface but could be stabilized through proper surface protection using a chelating dithiol.
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Affiliation(s)
- Shiyong Zhang
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA
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28
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Lee LC, Zhao Y. Size-selective phase-transfer catalysis with interfacially cross-linked reverse micelles. Org Lett 2012; 14:784-7. [PMID: 22273173 DOI: 10.1021/ol203319w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Cross-linking of the reverse micelles (RMs) of a triallylammonium surfactant afforded organic nanoparticles with introverted cationic groups. The cross-linked reverse micelles catalyzed size-selective biphasic reaction between sodium azide and alkyl bromides. Size selectivity of up to 9:1 was obtained for alkyl bromides with similar structures. The selectivity was influenced strongly by the size of the water pool and proposed to happen as a result of the "sieving" effect of the alkyl corona.
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Affiliation(s)
- Li-Chen Lee
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA
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29
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Cao PF, Zhao RX, Li L, Yang WW, Cheng F, Chen Y, Lu CH, Jiang SC. Covalently stabilized vesicles derived from amphiphilic multiarm star polymers: Preparation, characterization, and their capability of hosting different polarity of guests. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.25015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Kohut A, Kudina O, Dai X, Schulz DL, Voronov A. Host-guest interactions between a nonmicellized amphiphilic invertible polymer and insoluble cyclohexasilane in acetonitrile. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10356-10359. [PMID: 21797281 DOI: 10.1021/la201883f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Host-guest interactions between cyclohexasilane (Si(6)H(12)) and amphiphilic invertible macromolecules based on PEG and sebacic acid in acetonitrile (neither a solvent for cyclohexasilane nor a support for the micellization of amphiphilic invertible macromolecules) have been investigated. Despite the extended conformation of the macromolecules and the absence of self-assembled polymeric domains, a macromolecular amphiphilicity itself contributes to localizing Si(6)H(12) by AIP and thus enables Lewis acid-base interactions between Si(6)H(12) and the AIP carbonyl groups. The obtained results demonstrate an interesting phenomenon in that insoluble Si(6)H(12) can be localized by AIP macromolecules in a medium that does not support the formation of polymeric domains.
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Affiliation(s)
- Ananiy Kohut
- Department of Coatings and Polymeric Materials, North Dakota State University, P.O. Box 6050, Fargo, North Dakota 58108-6050, USA
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31
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Zhang S, Zhao Y. Facile preparation of organic nanoparticles by interfacial cross-linking of reverse micelles and template synthesis of subnanometer Au-Pt nanoparticles. ACS NANO 2011; 5:2637-2646. [PMID: 21366348 DOI: 10.1021/nn102666k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A single- and a double-tailed cationic surfactant with the triallylammonium headgroup formed reverse micelles (RMs) in heptane/chloroform containing a small amount of water. The reverse micelles were cross-linked at the interface upon UV irradiation in the presence of a water-soluble dithiol cross-linker and a photoinitiator. The resulting interfacially cross-linked reverse micelles (ICRMs) of the single-tailed surfactant aggregated in a solvent-dependent fashion, whereas those of the double-tailed were identical in size as the corresponding RMs. The ICRMs could extract anionic metal salts, such as AuCl(4)(-) and PtCl(6)(2-), from water into the organic phase. Au and Pt metal nanoparticles were produced upon reduction of metal salts. The covalent nature of the ICRMs made the template synthesis highly predictable, with the size of the metal particles controlled by the amount of the metal salt and the method of reduction. Nanoalloys were obtained by combining two metal precursors in the same reaction. Reduction of the ICRM-entrapped aurate also occurred without any external reducing agents, and the gold nanoparticles differed dramatically from those obtained through sodium borohydride reduction. The same template allowed the preparation of luminescent Au(4), Au(8), and Au(13)-Au(23) clusters, as well as gold nanoparticles several nanometers in size, simply by using different amounts of gold precursor and reducing conditions.
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Affiliation(s)
- Shiyong Zhang
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA
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32
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Kim D, Kim E, Lee J, Hong S, Sung W, Lim N, Park CG, Kim K. Direct Synthesis of Polymer Nanocapsules: Self-Assembly of Polymer Hollow Spheres through Irreversible Covalent Bond Formation. J Am Chem Soc 2010; 132:9908-19. [DOI: 10.1021/ja1039242] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dongwoo Kim
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
| | - Eunju Kim
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
| | - Jiyeong Lee
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
| | - Soonsang Hong
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
| | - Wokyung Sung
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
| | - Namseok Lim
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
| | - Chan Gyung Park
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
| | - Kimoon Kim
- National Creative Research Initiative Center for Smart Supramolecules, Department of Chemistry, Division of Advanced Materials Science, Department of Physics, and Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790-784, Republic of Korea
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33
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Meli L, Santiago JM, Lodge TP. Path-Dependent Morphology and Relaxation Kinetics of Highly Amphiphilic Diblock Copolymer Micelles in Ionic Liquids. Macromolecules 2010. [DOI: 10.1021/ma902366c] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Timothy P. Lodge
- Department of Chemistry
- Department of Chemical Engineering and Materials Science
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34
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Parenago OP, Kuz’mina GN, Bakunin VN, Oganesova EY. Nanosized structures in high-temperature oxidation of lubricating oil hydrocarbons. RUSS J GEN CHEM+ 2009. [DOI: 10.1134/s107036320906053x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Klaikherd A, Nagamani C, Thayumanavan S. Multi-stimuli sensitive amphiphilic block copolymer assemblies. J Am Chem Soc 2009; 131:4830-8. [PMID: 19290632 PMCID: PMC2693022 DOI: 10.1021/ja809475a] [Citation(s) in RCA: 471] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stimuli-responsive polymers are arguably the most widely considered systems for a variety of applications in biomedical arena. We report here a novel triple stimuli sensitive block copolymer assembly that responds to changes in temperature, pH and redox potential. Our block copolymer design constitutes an acid-sensitive THP-protected HEMA as the hydrophobic part and a temperature-sensitive PNIPAM as the hydrophilic part with an intervening disulfide bond. The micellar properties and the release kinetics of the encapsulated guest molecule in response to one stimulus as well as combinations of stimuli have been evaluated. Responsiveness to combination of stimuli not only allows for fine-tuning the guest molecule release kinetics, but also provides the possibility of achieving location-specific delivery.
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Affiliation(s)
- Akamol Klaikherd
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003
| | | | - S. Thayumanavan
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003
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36
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Photochemically triggered transfer of bovine serum albumin by reverse micelle containing a Malachite Green leuconitrile derivative. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2008.12.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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37
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Abstract
Core-shell materials, in which a layer or multilayer of inorganic or organic material surrounds an inorganic or organic particle core, have been investigated both as a means to improve the stability and surface chemistry of the core particle and as a way of accessing unique physical and chemical properties that are not possible from one material alone. As a result, the fabrication of core-shell particles is attracting a great deal of interest because of their unique properties and potential applicability in catalysis, semiconductors, drug delivery, enzyme immobilization, molecular recognition, chemical sensing, etc. As evidenced by the literature described and discussed in this review, a basic understanding of the mechanism and recent progress in production methods have enabled the fabrication of core-shell particles with unique and tailored properties for various applications in materials science.
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38
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Hur SR, Kim YS, Won JC, Lee JH, Jung HM. Hollow hybrid spheres with silica inner shell for non-deformable, core exchangeable properties. Chem Commun (Camb) 2008:5405-7. [DOI: 10.1039/b811724a] [Citation(s) in RCA: 7] [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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39
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Guerrero-Sanchez C, Gohy JF, D’Haese C, Thijs H, Hoogenboom R, Schubert US. Controlled thermoreversible transfer of poly(oxazoline) micelles between an ionic liquid and water. Chem Commun (Camb) 2008:2753-5. [DOI: 10.1039/b804179b] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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O'Reilly RK. Spherical polymer micelles: nanosized reaction vessels? PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2007; 365:2863-78. [PMID: 17855212 DOI: 10.1098/rsta.2007.0019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Supramolecular self-assembly techniques have provided a versatile means by which to selectively assemble polymeric molecules into well-defined three-dimensional nanostructures. The stabilization and tailoring of these dynamic nanostructures can be achieved using a range of chemistries to afford functional robust nanoparticles. Many examples of the stabilization, functionalization and application of these nanoparticles have been reported in the literature, and this paper will focus on these areas in the context of their potential application as nanometre-sized reaction vessels.
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Affiliation(s)
- R K O'Reilly
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK.
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Kim D, Kim E, Kim J, Park KM, Baek K, Jung M, Ko YH, Sung W, Kim HS, Suh JH, Park CG, Na OS, Lee DK, Lee KE, Han SS, Kim K. Direct synthesis of polymer nanocapsules with a noncovalently tailorable surface. Angew Chem Int Ed Engl 2007; 46:3471-4. [PMID: 17221900 DOI: 10.1002/anie.200604526] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dongwoo Kim
- National Creative Research Initiative Center for Smart Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea
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42
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McCarthy P, Chattopadhyay M, Millhauser G, Tsarevsky N, Bombalski L, Matyjaszewski K, Shimmin D, Avdalovic N, Pohl C. Nanoengineered analytical immobilized metal affinity chromatography stationary phase by atom transfer radical polymerization: separation of synthetic prion peptides. Anal Biochem 2007; 366:1-8. [PMID: 17481564 PMCID: PMC2899152 DOI: 10.1016/j.ab.2007.03.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2006] [Revised: 03/01/2007] [Accepted: 03/08/2007] [Indexed: 11/17/2022]
Abstract
Atom transfer radical polymerization (ATRP) was employed to create isolated, metal-containing nanoparticles on the surface of nonporous polymeric beads with the goal of developing a new immobilized metal affinity chromatography (IMAC) stationary phase for separating prion peptides and proteins. Transmission electron microscopy was used to visualize nanoparticles on the substrate surface. Individual ferritin molecules were also visualized as ferritin-nanoparticle complexes. The column's resolving power was tested by synthesizing peptide analogs to the copper binding region of prion protein and injecting mixtures of these analogs onto the column. As expected, the column was capable of separating prion-related peptides differing in number of octapeptide repeat units (PHGGGWGQ), (PHGGGWGQ)(2), and (PHGGGWGQ)(4). Unexpectedly, the column could also resolve peptides containing the same number of repeats but differing only in the presence of a hydrophilic tail, Q-->A substitution, or amide nitrogen methylation.
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Affiliation(s)
- P. McCarthy
- Research and Development, Dionex Corporation, Sunnyvale, CA 94088, USA
| | - M. Chattopadhyay
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - G.L. Millhauser
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - N.V. Tsarevsky
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - L. Bombalski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - K. Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | | | - N. Avdalovic
- Research and Development, Dionex Corporation, Sunnyvale, CA 94088, USA
| | - C. Pohl
- Research and Development, Dionex Corporation, Sunnyvale, CA 94088, USA
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43
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Uskoković V, Drofenik M. Reverse micelles: inert nano-reactors or physico-chemically active guides of the capped reactions. Adv Colloid Interface Sci 2007; 133:23-34. [PMID: 17400166 DOI: 10.1016/j.cis.2007.02.002] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2006] [Revised: 02/19/2007] [Accepted: 02/19/2007] [Indexed: 11/22/2022]
Abstract
Reverse micelles present self-assembled multi-molecular entities formed within specific compositional ranges of water-in-oil microemulsions. The structure of a reverse micelle is typically represented as nano-sized droplet of a polar liquid phase, capped by a monolayer of surfactant molecules, and uniformly distributed within a non-polar, oil phase. Although their role in serving as primitive membranes for encapsulation of primordial self-replicating chemical cycles that anticipated the very origins of life has been proposed, their first application for 'parent(hesis)ing' chemical reactions with an aim to produce 'templated' 2D arrays of nanoparticles dates back to only 25 years ago. Reverse micelles have since then been depicted as passive nano-reactors that via their shapes template the growing crystalline nuclei into narrowly dispersed or even perfectly uniform nano-sized particles. Despite this, numerous examples can be supported, where from deviations from the simple unilateral correlations between size and shape distribution of reverse micelles and the particles formed within may be reasonably implied. A rather richer, dynamical role of reverse micelles, with potential significance in the research and design of complex, self-assembly synthesis pathways, as well as possible adoption of their application as an aspect of biomimetic approach, is suggested herein.
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Affiliation(s)
- Vuk Uskoković
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
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44
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Kim D, Kim E, Kim J, Park K, Baek K, Jung M, Ko Y, Sung W, Kim H, Suh J, Park C, Na O, Lee DK, Lee K, Han S, Kim K. Direct Synthesis of Polymer Nanocapsules with a Noncovalently Tailorable Surface. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604526] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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45
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Liu H, Chen Y, Zhu D, Shen Z, Stiriba SE. Hyperbranched polyethylenimines as versatile precursors for the preparation of different type of unimolecular micelles. REACT FUNCT POLYM 2007. [DOI: 10.1016/j.reactfunctpolym.2007.01.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Multiarm star polyglycerol-block-poly(HEMA) as a versatile precursor for the preparation of micellar nanocapsules with different properties. REACT FUNCT POLYM 2007. [DOI: 10.1016/j.reactfunctpolym.2006.10.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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47
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Savariar EN, Aathimanikandan SV, Thayumanavan S. Supramolecular assemblies from amphiphilic homopolymers: Testing the scope. J Am Chem Soc 2006; 128:16224-30. [PMID: 17165775 PMCID: PMC2526122 DOI: 10.1021/ja065213o] [Citation(s) in RCA: 176] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
It has been shown by us in a recent communication that homopolymers, in which each repeat unit contains a hydrophilic and a hydrophobic head group, are capable of forming environment-dependent micellar or inverse micellar assemblies. A systematic structure-property relationship study is carried out here to test the scope of the design. We show here that the molecular design is indeed broadly applicable and that there is a significant gain in the critical aggregation concentrations of these polymers, as compared to the small molecule counterparts. We also show that the design can be tuned to achieve vesicle-type assemblies, which further expands the repertoire of amphiphilic homopolymers in a variety of areas. Characterizations of these assemblies have been carried out using transmission electron microscopy, dynamic light scattering, static light scattering, and dye incorporation experiments.
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Affiliation(s)
| | | | - S. Thayumanavan
- Department of Chemistry, University of Massachusetts Amherst, Massachusetts 01003
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48
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Khalil RA. A new approach to micellization parameters using iterative mathematical method. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2006.02.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Koenig S, Chechik V. Shell cross-linked Au nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:5168-73. [PMID: 16700609 DOI: 10.1021/la0600604] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The organic layer of thiol-protected Au nanoparticles (ca.3 nm in diameter) was cross-linked using ring-opening metathesis polymerization or Michael addition of polyfunctional amines. The shell cross-linked nanoparticles showed increased stability toward thermal treatment and oxidative etching. The Au core of cross-linked nanoparticles was removed in an attempt to prepare hollow capsules. However, Au etching resulted in insoluble materials.
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Affiliation(s)
- Stéphanie Koenig
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
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50
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Basu S, Vutukuri DR, Thayumanavan S. Homopolymer micelles in heterogeneous solvent mixtures. J Am Chem Soc 2006; 127:16794-5. [PMID: 16316219 PMCID: PMC2532981 DOI: 10.1021/ja056042a] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Amphiphilic homopolymers containing a hydrophilic and a hydrophobic functionality in each monomer unit have been shown to form polar or apolar containers depending on the solvent environment. When presented with a mixture of solvents, these polymeric containers are capable of releasing certain guest molecules. The fundamental mechanism behind these properties is investigated, and the utility of these assemblies in separations has been demonstrated with an example.
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Affiliation(s)
- Subhadeep Basu
- Department of Chemistry, University of Massachusetts, Amherst, 01003, USA
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