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Lu Y, Liu D, Wei X, Song J, Xiao Q, Du K, Shi X, Gao H. Synthesis and Thermoreversible Gelation of Coil-Rod Copolymers with a Dendritic Polyethylene Core and Multiple Helical Poly(γ-benzyl-L-glutamate) Arms. Polymers (Basel) 2023; 15:4351. [PMID: 38006076 PMCID: PMC10675438 DOI: 10.3390/polym15224351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
Coil-rod copolymers with a dendritic polyethylene (DPE) core and multiple helical poly(γ-benzyl-L-glutamate) (PBLG) arms (DPE-(PBLG)n) were prepared by palladium-catalyzed copolymerization in tandem with ring-opening polymerization (ROP). Macroinitiator (DPE-(NH2)11) was firstly prepared by the group transformation of DPE-(OH)11 generated from palladium-catalyzed copolymerization of ethylene and acrylate comonomer. Coil-helical DPE-(PBLG)11 copolymers were prepared by ROP of γ-benzyl-L-glutamate-N-carboxyanhydride (BLG-NCA). These DPE-(PBLG)11 copolymers could form thermoreversible gels in toluene solvent, and the dendritic topology of the DPE core increased the critical gelation concentrations. The self-assembled nanostructure of gels was fully characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), small-angle X-ray scattering (SAXS), and wide-angle X-ray diffraction (WAXD), and the morphology of the fibrous structure was a twisted flat ribbon through a self-assembled nanoribbon mechanism. The self-assembled fibers formed by DPE-(PBLG45)11 are more heterogeneous and ramified than previously observed fibers formed by PBLG homopolymer and block copolymers.
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Affiliation(s)
- Yuliang Lu
- China National Offshore Oil Corporation Energy Technology & Services Limited Shenzhen Branch, Shenzhen 518067, China; (Y.L.); (D.L.); (X.W.); (J.S.); (Q.X.); (K.D.)
| | - Dongtao Liu
- China National Offshore Oil Corporation Energy Technology & Services Limited Shenzhen Branch, Shenzhen 518067, China; (Y.L.); (D.L.); (X.W.); (J.S.); (Q.X.); (K.D.)
| | - Xinjie Wei
- China National Offshore Oil Corporation Energy Technology & Services Limited Shenzhen Branch, Shenzhen 518067, China; (Y.L.); (D.L.); (X.W.); (J.S.); (Q.X.); (K.D.)
| | - Jiming Song
- China National Offshore Oil Corporation Energy Technology & Services Limited Shenzhen Branch, Shenzhen 518067, China; (Y.L.); (D.L.); (X.W.); (J.S.); (Q.X.); (K.D.)
| | - Qiaogang Xiao
- China National Offshore Oil Corporation Energy Technology & Services Limited Shenzhen Branch, Shenzhen 518067, China; (Y.L.); (D.L.); (X.W.); (J.S.); (Q.X.); (K.D.)
| | - Kezheng Du
- China National Offshore Oil Corporation Energy Technology & Services Limited Shenzhen Branch, Shenzhen 518067, China; (Y.L.); (D.L.); (X.W.); (J.S.); (Q.X.); (K.D.)
| | - Xinbo Shi
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-Sen University, Guangzhou 510275, China;
- Chain Walking New Material Technology (Guangzhou) Co., Ltd., Guangzhou 511457, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-Sen University, Guangzhou 510275, China;
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Lv Y, Zhao Y, Liu Y, Zhou Z, Shen Y, Jiang L. Self-Assembling Oligo(2-oxazoline) Organogelators for the Encapsulation and Slow Release of Bioactive Volatiles. ACS OMEGA 2022; 7:27523-27531. [PMID: 35967068 PMCID: PMC9366986 DOI: 10.1021/acsomega.2c02905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 07/15/2022] [Indexed: 05/12/2023]
Abstract
Herein, we report a class of distinctive supramolecular nanostructures in situ-generated from the cationic ring-opening polymerization of a particular 2-oxazoline monomer, i.e., 2-(N-tert-butyloxycarbonylaminomethyl)-2-oxazoline (Ox1). Driven by side-chain hydrogen bonding between neighboring molecules and van der Waals interactions, the growing oligomers of Ox1 precipitate in the form of macroscopic platelets when the degree of polymerization reaches 5-7. A similar self-assembly occurred in the block copolymerization of 2-ethyl-2-oxazoline (EtOx) or 2-pentyl-2-oxazoline (PeOx) and Ox1 as the second monomer. These polymeric aggregates were found to disassemble into rod-like nanoparticles under appropriate conditions, and to form stable organogels in some polar solvents like dimethylformamide as well as in natural liquid fragrances such as (R)-carvone, citronellal, and (R)-limonene. Scanning electron microscopy revealed that the morphology of their xerogels was solvent-dependent, mainly with a lamellar or fibrous structure. The rheology measurements confirmed the as-obtained organogels feature an obvious thixotropic character. The storage modulus was about 7-10 times higher than the loss modulus, indicating the physical crosslinking in the gel. The fragrance release profiles showed that the presented supramolecular gel system exhibits good sustained-release effect for the loaded bioactive volatiles.
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Affiliation(s)
- Yichao Lv
- Key
Laboratory of Macromolecular Synthesis and Functionalization of Ministry
of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yuanjiang Zhao
- Key
Laboratory of Macromolecular Synthesis and Functionalization of Ministry
of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yuhang Liu
- Key
Laboratory of Macromolecular Synthesis and Functionalization of Ministry
of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhuxian Zhou
- Key
Laboratory of Biomass Chemical Engineering of Ministry of Education
and Zhejiang Key Laboratory of Smart Biomaterials, College of Chemical
and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Youqing Shen
- Key
Laboratory of Biomass Chemical Engineering of Ministry of Education
and Zhejiang Key Laboratory of Smart Biomaterials, College of Chemical
and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Liming Jiang
- Key
Laboratory of Macromolecular Synthesis and Functionalization of Ministry
of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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3
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Nandi M, Banerjee S, De P. Stearoyl-appended pendant amino acid-based hyperbranched polymers for selective gelation of oil from oil/water mixtures. Polym Chem 2019. [DOI: 10.1039/c9py00105k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Stearic acid-appended pendant amino acid-based poly(methacrylate) hyperbranched polymers were developed for the phase-selective organogelation of crude oil from a binary mixture of oil/water.
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Affiliation(s)
- Mridula Nandi
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur 741246, Nadia
- India
| | - Soham Banerjee
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur 741246, Nadia
- India
| | - Priyadarsi De
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur 741246, Nadia
- India
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4
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Kale TS, Marine JE, Tovar JD. Self-Assembly and Associated Photophysics of Dendron-Appended Peptide-π-Peptide Triblock Macromolecules. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00821] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
| | - Jeannette E. Marine
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
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5
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He X, Fan J, Wooley KL. Stimuli-Triggered Sol-Gel Transitions of Polypeptides Derived from α-Amino Acid N
-Carboxyanhydride (NCA) Polymerizations. Chem Asian J 2015; 11:437-47. [DOI: 10.1002/asia.201500957] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Indexed: 12/27/2022]
Affiliation(s)
- Xun He
- Departments of Chemistry, Chemical Engineering; and Materials Science and Engineering; Laboratory for Synthetic-Biologic Interactions; Texas A&M University; 3255 TAMU College Station TX 77842 USA
| | - Jingwei Fan
- Departments of Chemistry, Chemical Engineering; and Materials Science and Engineering; Laboratory for Synthetic-Biologic Interactions; Texas A&M University; 3255 TAMU College Station TX 77842 USA
| | - Karen L. Wooley
- Departments of Chemistry, Chemical Engineering; and Materials Science and Engineering; Laboratory for Synthetic-Biologic Interactions; Texas A&M University; 3255 TAMU College Station TX 77842 USA
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6
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Kalva N, Aswal VK, Ambade AV. Effect of the Branching Pattern of Hydrophobic Dendrons on the Core Structure of Linear-Dendritic Copolymer Micelles. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Nagendra Kalva
- Polymer Science and Engineering Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
| | - Vinod K. Aswal
- Solid State Physics Division; Bhabha Atomic Research Centre; Mumbai 400085 India
| | - Ashootosh V. Ambade
- Polymer Science and Engineering Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
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7
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Chen C, Wu D, Fu W, Li Z. Tunable Organogelator from Alkyl-Polypeptide Diblock Prepared by Ring-Opening Polymerization. Aust J Chem 2014. [DOI: 10.1071/ch13349] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Three alkyl-polypeptide hybrid amphiphiles were synthesized by the ring-opening polymerization (ROP) of γ-(2-methoxyethoxy)esteryl-l-glutamate N-carboxyanhydride (l-EG1Glu NCA) using alkylamine, i.e. C6H13NH2, C14H29NH2, and C16H33NH2, as initiators. As-prepared alkyl-poly-l-EG1Glu hybrids were found to form clear organogels in several organic solvents at low concentration. FTIR and circular dichroism characterizations suggested that poly-l-EG1Glu formed a predominantly β-sheet conformation, which accounted for the gelation. Transmission electron and atomic force microscopy characterizations revealed that these copolymers formed nanoribbon structures in THF.
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8
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Affiliation(s)
- Sherin Fahainy Nasir
- Department of Chemical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Republic of Korea
| | - Justyn Jaworski
- Department of Chemical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Republic of Korea
- Institute of Nanoscience and Technology, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Republic of Korea
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9
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Synthesis and thermoreversible gelation of coil-helical polyethylene-block-poly(γ-benzyl-l-glutamate) diblock copolymer. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.06.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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10
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Bao S, Qin W, Wu Q, Liang G, Zhu F, Wu Q. Synthesis and characterization of ultrathin metal coordination Prussian blue nanoribbons. Dalton Trans 2013; 42:5242-6. [DOI: 10.1039/c3dt00060e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Ordering of Polypeptides in Liquid Crystals, Gels and Micelles. CONTROLLED POLYMERIZATION AND POLYMERIC STRUCTURES 2013. [DOI: 10.1007/12_2013_221] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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12
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Rhodes AJ, Deming TJ. Tandem catalysis for the preparation of cylindrical polypeptide brushes. J Am Chem Soc 2012; 134:19463-7. [PMID: 23134537 DOI: 10.1021/ja308620h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Here, we report a method for synthesis of cylindrical copolypeptide brushes via N-carboxyanhydride (NCA) polymerization utilizing a new tandem catalysis approach that allows preparation of brushes with controlled segment lengths in a straightforward, one-pot procedure requiring no intermediate isolation or purification steps. To obtain high-density brush copolypeptides, we used a "grafting from" approach where alloc-α-aminoamide groups were installed onto the side chains of NCAs to serve as masked initiators. These groups were inert during cobalt-initiated NCA polymerization and gave allyloxycarbonyl-α-aminoamide-substituted polypeptide main chains. The alloc-α-aminoamide groups were then activated in situ using nickel to generate initiators for growth of side-chain brush segments. This use of stepwise tandem cobalt and nickel catalysis was found to be an efficient method for preparation of high-chain-density, cylindrical copolypeptide brushes, where both the main chains and side chains can be prepared with controlled segment lengths.
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Affiliation(s)
- Allison J Rhodes
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
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13
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Chen CY, Ito Y, Chiu YC, Wu WC, Higashihara T, Ueda M, Chen WC. pH-responsive Dendritic Gelators. CHEM LETT 2012. [DOI: 10.1246/cl.2012.92] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ching-Yi Chen
- Department of Chemical Engineering, National Chung Cheng University
| | - Yumiko Ito
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Yu-Cheng Chiu
- Department of Chemical Engineering, National Taiwan University
| | - Wen-Chung Wu
- Department of Chemical Engineering, National Cheng Kung University
| | - Tomoya Higashihara
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Mitsuru Ueda
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Wen-Chang Chen
- Department of Chemical Engineering, National Taiwan University
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14
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Hoshizawa H, Suzuki M, Hanabusa K. Cyclo(L-aspartyl-L-phenylalanyl)-containing Poly(dimethylsiloxane)-based Thixotropic Organogels. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1143] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Park C, Lee J, Kim C. Functional supramolecular assemblies derived from dendritic building blocks. Chem Commun (Camb) 2011; 47:12042-56. [PMID: 21785775 DOI: 10.1039/c1cc11531f] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Control of the structure and function of self-assembled materials has been a significant issue in many areas of nanoscience. Among many different types of building blocks, dendritic ones have shown interesting self-assembly behaviour and functional performances due to their unique shape and multiple functionalities. Dendritic building blocks exhibit unique self-assembly behaviour in diverse environments such as aqueous and organic solutions, solid-liquid interfaces, and thermotropic solid conditions. Tuning the balance between hydrophilic and hydrophobic parts, as well as the external conditions for self-assembly, provides unique opportunities for control of supramolecular architectures. Furthermore, the introduction of suitable functional moieties into dendrons enables us to control self-assembly characteristics, allowing nanostructures to exhibit smart performances for electronic or biological applications. The self-assembly characteristics of amphiphilic dendrons under various conditions were investigated to elucidate how dendrons can assemble into nanoscopic structures and how these nanoassemblies exhibit unique properties. Well-defined nanostructures derived from self-assembly of dendrons provide an efficient approach for exhibition of unique functions at the nanoscale. This feature article describes the unique self-assembly characteristics of various types of dendritic building blocks and their potential applications as advanced materials.
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Affiliation(s)
- Chiyoung Park
- Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea
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16
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Pérez Y, Mann E, Herradón B. Preparation and characterization of gold nanoparticles capped by peptide–biphenyl hybrids. J Colloid Interface Sci 2011; 359:443-53. [DOI: 10.1016/j.jcis.2011.04.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 03/30/2011] [Accepted: 04/09/2011] [Indexed: 01/15/2023]
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17
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Zhang Z, Yang M, Hu C, Liu B, Hu M, Zhang X, Wang W, Zhou Y, Wang H. Correlation between gel-forming ability, supramolecular aggregates and main-chain conformation of dendronized polymer gelators. NEW J CHEM 2011. [DOI: 10.1039/c0nj00371a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Kim JA, Jeong YH, Jang WD. Versatile Supramolecular Gelling Agents: Unusual Stabilization of Physical Gels by Lithium Ions. Chemistry 2010; 16:13955-9. [DOI: 10.1002/chem.201002185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Banno M, Wu ZQ, Nagai K, Sakurai SI, Okoshi K, Yashima E. Two-Dimensional Bilayer Smectic Ordering of Rigid Rod−Rod Helical Diblock Polyisocyanides. Macromolecules 2010. [DOI: 10.1021/ma1009116] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Motonori Banno
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Zong-Quan Wu
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Kanji Nagai
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Shin-ichiro Sakurai
- Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Kento Okoshi
- Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
- Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
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20
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Synthesis and characterization of functionalized poly(γ-benzyl-l-glutamate) derivates and corresponding nanoparticles preparation and characterization. Int J Pharm 2010; 387:244-52. [DOI: 10.1016/j.ijpharm.2009.12.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 12/02/2009] [Accepted: 12/04/2009] [Indexed: 11/17/2022]
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21
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You Y, Chen Y, Hua C, Dong CM. Synthesis and thermoreversible gelation of dendron-like polypeptide/linear poly(ε-caprolactone)/dendron-like polypeptide triblock copolymers. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23834] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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22
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Rosen BM, Wilson CJ, Wilson DA, Peterca M, Imam MR, Percec V. Dendron-Mediated Self-Assembly, Disassembly, and Self-Organization of Complex Systems. Chem Rev 2009; 109:6275-540. [DOI: 10.1021/cr900157q] [Citation(s) in RCA: 1066] [Impact Index Per Article: 71.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Brad M. Rosen
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Christopher J. Wilson
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Daniela A. Wilson
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Mihai Peterca
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Mohammad R. Imam
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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23
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Naik SS, Savin DA. Poly(Z-lysine)-Based Organogels: Effect of Interfacial Frustration on Gel Strength. Macromolecules 2009. [DOI: 10.1021/ma9011126] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandeep S. Naik
- School of Polymers and High Performance Materials, University of Southern Mississippi, Hattiesburg, Mississippi 39406
- Department of Chemistry, University of Vermont, Burlington, Vermont 05405
| | - Daniel A. Savin
- School of Polymers and High Performance Materials, University of Southern Mississippi, Hattiesburg, Mississippi 39406
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24
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Yang Y, Hua C, Dong CM. Synthesis, Self-Assembly, and In Vitro Doxorubicin Release Behavior of Dendron-like/Linear/Dendron-like Poly(ε-caprolactone)-b-Poly(ethylene glycol)-b-Poly(ε-caprolactone) Triblock Copolymers. Biomacromolecules 2009; 10:2310-8. [DOI: 10.1021/bm900497z] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yang Yang
- Department of Polymer Science & Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Chong Hua
- Department of Polymer Science & Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Chang-Ming Dong
- Department of Polymer Science & Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
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25
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Gao M, Kuang GC, Jia XR, Li WS, Li Y, Wei Y. Butylamide-terminated poly(amidoamine) dendritic gelators. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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26
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Hsu SJ, Hsu KM, Leong MK, Lin IJB. Au(i)-benzimidazole/imidazole complexes. Liquid crystals and nanomaterials. Dalton Trans 2008:1924-31. [DOI: 10.1039/b717787a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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27
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Suzuki M, Setoguchi C, Shirai H, Hanabusa K. Organogelation by polymer organogelators with a L-lysine derivative: formation of a three-dimensional network consisting of supramolecular and conventional polymers. Chemistry 2007; 13:8193-200. [PMID: 17639539 DOI: 10.1002/chem.200700146] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Polymer compounds consisting of a L-lysine derivative and conventional polymers, such as poly(ethylene glycol), polycarbonate, polyesters, and poly(alkylene), have been synthesized and their organogelation properties examined in various solvents. These polymer compounds function as good organogelators that form organogels in many organic solvents and oils. The organogelation ability is almost independent of the polymer backbone. Observation by field-emission scanning electron microscopy (FE-SEM) demonstrates that the polymer organogelators form a supramolecular polymer with a diameter of several tens of nanometers and create a three-dimensional network in organogels. FT-IR spectroscopic analysis shows that the supramolecular polymer is mainly formed by the self-assembly of L-lysine segments through hydrogen-bonding and van der Waals interactions. Furthermore, the organogels formed by the polymer organogelators have a lower gel-sol temperature and higher gel strength than those of a low-molecular-weight model organogelator.
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Affiliation(s)
- Masahiro Suzuki
- Graduate School of Science and Technology, Shinshu University, Ueda, Nagano 386-8567, Japan.
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28
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Kim KT, Winnik MA, Manners I. Synthesis and self-assembly of dendritic-helical block copolypeptides. SOFT MATTER 2006; 2:957-965. [PMID: 32680183 DOI: 10.1039/b606272e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Dendritic-helical diblock copolypeptides, dendritic poly(-lysine)--poly(γ-benzyl--glutamate) (PBLG-Lys) were synthesized up to 4th generation of dendritic poly(-lysine). PBLG was synthesized by conventional ring-opening polymerization of γ-benzyl--glutamate--carboxyanhydride with heptyl amine as an initiator. The -terminus of this PBLG was used for further coupling reactions with ,-bis(-butoxycarbonyl)--lysine pentafluorophenylester. These block copolypeptides possess well-defined 3-D structures in solution, and they self-assemble into a fibrous structure a nanoribbon mechanism in toluene. Amphiphilic block copolypeptides were obtained after deprotecting BOC groups at the periphery of the lysine dendrimer block. Due to the well-defined size and structure of the dendritic lysine block and well-defined α-helical conformation of the PBLG block, the block copolypeptides showed a generation-dependent self-assembly behavior in aqueous solution.
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Affiliation(s)
- Kyoung Taek Kim
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada.
| | - Mitchell A Winnik
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada.
| | - Ian Manners
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada. and The School of Chemistry, University of Bristol, Bristol, UKBS8 1TS.
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