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Double hydrophilic block copolymers self-assemblies in biomedical applications. Adv Colloid Interface Sci 2020; 283:102213. [PMID: 32739324 DOI: 10.1016/j.cis.2020.102213] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 07/12/2020] [Accepted: 07/16/2020] [Indexed: 12/22/2022]
Abstract
Double-hydrophilic block copolymers (DHBCs), consisting of at least two different water-soluble blocks, are an alternative to the classical amphiphilic block copolymers and have gained increasing attention in the field of biomedical applications. Although the chemical nature of the two blocks can be diverse, most classical DHBCs consist of a bioeliminable non-ionic block to promote solubilization in water, like poly(ethylene glycol), and a second block that is more generally a pH-responsive block capable of interacting with another ionic polymer or substrate. This second block is generally non-degradable and the presence of side chain functional groups raises the question of its fate and toxicity, which is a limitation in the frame of biomedical applications. In this review, following a first part dedicated to recent examples of non-degradable DHBCs, we focus on the DHBCs that combine a biocompatible and bioeliminable non-ionic block with a degradable functional block including polysaccharides, polypeptides, polyesters and other miscellaneous polymers. Their use to design efficient drug delivery systems for various biomedical applications through stimuli-dependent self-assembly is discussed along with the current challenges and future perspectives for this class of copolymers.
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Finney AR, Innocenti Malini R, Freeman CL, Harding JH. Amino Acid and Oligopeptide Effects on Calcium Carbonate Solutions. CRYSTAL GROWTH & DESIGN 2020; 20:3077-3092. [PMID: 32581657 PMCID: PMC7304842 DOI: 10.1021/acs.cgd.9b01693] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 04/08/2020] [Indexed: 05/04/2023]
Abstract
Biological organisms display sophisticated control of nucleation and crystallization of minerals. In order to mimic living systems, deciphering the mechanisms by which organic molecules control the formation of mineral phases from solution is a key step. We have used computer simulations to investigate the effects of the amino acids arginine, aspartic acid, and glycine on species that form in solutions of calcium carbonate (CaCO3) at lower and higher levels of supersaturation. This provides net positive, negative, and neutral additives. In addition, we have prepared simulations containing hexapeptides of the amino acids to consider the effect of additive size on the solution species. We find that additives have limited impact on the formation of extended, liquid-like CaCO3 networks in supersaturated solutions. Additives control the amount of (bi)carbonate in solution, but more importantly, they are able to stabilize these networks on the time scales of the simulations. This is achieved by coordinating the networks and assembled additive clusters in solutions. The association leads to subtle changes in the coordination of CaCO3 and reduced mobility of the cations. We find that the number of solute association sites and the size and topology of the additives are more important than their net charge. Our results help to understand why polymer additives are so effective at stabilizing dense liquid CaCO3 phases.
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Affiliation(s)
- Aaron R. Finney
- Department
of Materials Science and Engineering, University
of Sheffield, Sheffield S1 3JD, United Kingdom
- Department
of Chemical Engineering, University College
London, London WC1E 6BT, United Kingdom
- E-mail:
| | - Riccardo Innocenti Malini
- Laboratory
for Biomimetic Membranes and Textiles, EMPA,
Swiss Federal Laboratories for Materials Science and Technology, St. Gallen 9014, Switzerland
| | - Colin L. Freeman
- Department
of Materials Science and Engineering, University
of Sheffield, Sheffield S1 3JD, United Kingdom
| | - John H. Harding
- Department
of Materials Science and Engineering, University
of Sheffield, Sheffield S1 3JD, United Kingdom
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3
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Ergul Yilmaz Z, Cordonnier T, Debuigne A, Calvignac B, Jerome C, Boury F. Protein encapsulation and release from PEO-b-polyphosphoester templated calcium carbonate particles. Int J Pharm 2016; 513:130-137. [DOI: 10.1016/j.ijpharm.2016.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 08/30/2016] [Accepted: 09/02/2016] [Indexed: 11/16/2022]
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4
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Misbah MH, Espanol M, Quintanilla L, Ginebra MP, Rodríguez-Cabello JC. Formation of calcium phosphate nanostructures under the influence of self-assembling hybrid elastin-like-statherin recombinamers. RSC Adv 2016. [DOI: 10.1039/c6ra01100d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The self-assembly properties of elastin-like-statherin recombinamers have great influence on calcium phosphate mineralization.
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Affiliation(s)
- M. Hamed Misbah
- G.I.R. Bioforge
- University of Valladolid
- CIBER-BBN
- 47011 Valladolid
- Spain
| | - M. Espanol
- Biomaterials, Biomechanics and Tissue Engineering Group
- Department of Materials Science and Metallurgy
- Technical University of Catalonia
- 08028 Barcelona
- Spain
| | - Luis Quintanilla
- G.I.R. Bioforge
- University of Valladolid
- CIBER-BBN
- 47011 Valladolid
- Spain
| | - M. P. Ginebra
- Biomaterials, Biomechanics and Tissue Engineering Group
- Department of Materials Science and Metallurgy
- Technical University of Catalonia
- 08028 Barcelona
- Spain
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Zeynep EY, Antoine D, Brice C, Frank B, Christine J. Double hydrophilic polyphosphoester containing copolymers as efficient templating agents for calcium carbonate microparticles. J Mater Chem B 2015; 3:7227-7236. [PMID: 32262830 DOI: 10.1039/c5tb00887e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The use of calcium carbonate (CaCO3) microparticles is becoming more and more attractive in many fields especially in biomedical applications in which the fine tuning of the size, morphology and crystalline form of the CaCO3 particles is crucial. Although some structuring compounds, like hyaluronic acid, give satisfying results, the control of the particle structure still has to be improved. To this end, we evaluated the CaCO3 structuring capacity of novel well-defined double hydrophilic block copolymers composed of poly(ethylene oxide) and a polyphosphoester segment with an affinity for calcium like poly(phosphotriester)s bearing pendent carboxylic acids or poly(phosphodiester)s with a negatively charged oxygen atom on each repeating monomer unit. These copolymers were synthesized by a combination of organocatalyzed ring opening polymerization, thiol-yne click chemistry and protection/deprotection methods. The formulation of CaCO3 particles was then performed in the presence of these block copolymers (i) by the classical chemical pathway involving CaCl2 and Na2CO3 and (ii) by a process based on supercritical carbon dioxide (scCO2) technology in which CO3 2- ions are generated in aqueous media and react with Ca2+ ions. Porous CaCO3 microspheres composed of vaterite nanocrystals were obtained. Moreover, a clear dependence of the particle size on the structure of the templating agent was emphasized. In this work, we show that the use of the supercritical process and the substitution of hyaluronic acid for a carboxylic acid containing copolymer decreases the size of the CaCO3 particles by a factor of 6 (∼1.5 μm) while preventing their aggregation.
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Affiliation(s)
- Ergul Yilmaz Zeynep
- Chemistry Department, Center for Education and Research on Macromolecules (CERM), University of Liège (ULg), Sart Tilman, Building B6a-third floor, Liège, B-4000, Belgium.
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6
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Jensen ACS, Hinge M, Birkedal H. Calcite nucleation on the surface of PNIPAM–PAAc micelles studied by time resolved in situ PXRD. CrystEngComm 2015. [DOI: 10.1039/c5ce00424a] [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
Nanocrystalline calcite is formed under the influence of block copolymers containing thermoresponsive PNIPAM and a mineralization controlling block of poly(acrylic acid) and the nanocrystal formation kinetics studied by in situ X-ray diffraction.
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Affiliation(s)
| | - Mogens Hinge
- Department of Engineering
- Aarhus University
- DK-8000 Aarhus C, Denmark
| | - Henrik Birkedal
- Department of Chemistry & iNANO
- Aarhus University
- DK-8000 Aarhus C, Denmark
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7
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Bhosale DS, Drabina P, Palarčík J, Hanusek J, Sedlák M. Henry reaction catalyzed by recoverable enantioselective catalysts based on copper(II) complexes of α-methoxypoly(ethylene glycol)-b-poly(l-glutamic acid) and imidazolidine-4-one ligands. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.01.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Cao H, Yao J, Shao Z. Fabrication of superhydrophobic surfaces via CaCO3 mineralization mediated by poly(glutamic acid). J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2012.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Zhu W, Lin J, Cai C, Lu Y. Biomimetic mineralization of calcium carbonate mediated by a polypeptide-based copolymer. J Mater Chem B 2013; 1:841-849. [DOI: 10.1039/c2tb00182a] [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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10
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Zhu W, Lin J, Cai C. The effect of a thermo-responsive polypeptide-based copolymer on the mineralization of calcium carbonate. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15007g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Baynton A, Ogden MI, Raston CL, Jones F. Barium sulfate crystallization dependence on upper rim calix[4]arene functional groups. CrystEngComm 2012. [DOI: 10.1039/c1ce06083j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Maier M, Kotman N, Friedrichs C, Andrieu J, Wagner M, Graf R, Strauss WSL, Mailänder V, Weiss CK, Landfester K. Highly Site Specific, Protease Cleavable, Hydrophobic Peptide–Polymer Nanoparticles. Macromolecules 2011. [DOI: 10.1021/ma201149b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Matthias Maier
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Niklas Kotman
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Cornelius Friedrichs
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Julien Andrieu
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Manfred Wagner
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Robert Graf
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Wolfgang S. L. Strauss
- Institute of Laser Technologies in Medicine and Metrology, Ulm University, Helmholtzstrasse 12, 89081 Ulm, Germany
| | - Volker Mailänder
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- University Medicine of the Johannes Gutenberg University, III. Medical Clinic (Hematology, Oncology and Pulmonology), Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Clemens K. Weiss
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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Luo S, Han M, Cao Y, Ling C, Zhang Y. Temperature- and pH-responsive unimolecular micelles with a hydrophobic hyperbranched core. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2448-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Guo X, Liu L, Wang W, Zhang J, Wang Y, Yu SH. Controlled crystallization of hierarchical and porous calcium carbonate crystals using polypeptide type block copolymer as crystal growth modifier in a mixed solution. CrystEngComm 2011. [DOI: 10.1039/c0ce00202j] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Luo S, Ling C, Hu X, Liu X, Chen S, Han M, Xia J. Thermoresponsive unimolecular micelles with a hydrophobic dendritic core and a double hydrophilic block copolymer shell. J Colloid Interface Sci 2011; 353:76-82. [DOI: 10.1016/j.jcis.2010.09.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2010] [Revised: 09/08/2010] [Accepted: 09/10/2010] [Indexed: 11/29/2022]
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16
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Luo S, Hu X, Ling C, Liu X, Chen S, Han M. Multiarm star-like unimolecular micelles with a dendritic core and a dual thermosensitive shell. POLYM INT 2010. [DOI: 10.1002/pi.2989] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Knoop RJI, de Geus M, Habraken GJM, Koning CE, Menzel H, Heise A. Stimuli Responsive Peptide Conjugated Polymer Nanoparticles. Macromolecules 2010. [DOI: 10.1021/ma100327p] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rutger J. I. Knoop
- Technische Universiteit Eindhoven; Den Dolech 2, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Matthijs de Geus
- Technische Universiteit Eindhoven; Den Dolech 2, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Gijs J. M. Habraken
- Technische Universiteit Eindhoven; Den Dolech 2, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Cor E. Koning
- Technische Universiteit Eindhoven; Den Dolech 2, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Henning Menzel
- Technische Universität Braunschweig, Institut für Technische Chemie, Hans-Sommer-Str. 10, 38106 Braunschweig, Germany
| | - Andreas Heise
- Technische Universiteit Eindhoven; Den Dolech 2, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Dublin City University, School of Chemical Sciences, Dublin 9, Ireland
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18
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Krattiger P, Nassif N, Völkel A, Mastai Y, Wennemers H, Cölfen H. Investigation of active crystal morphogenesis peptide sequences from peptide libraries by crystallization on peptide functionalized beads. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2009.09.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Chen SF, Zhu JH, Jiang J, Cai GB, Yu SH. Polymer-controlled crystallization of unique mineral superstructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:540-545. [PMID: 20217750 DOI: 10.1002/adma.200901964] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The origin of complex superstructures of biomaterials in biological systems and the amazing self-assembly mechanisms of their emergence have attracted a great deal of attention recently. Mimicking nature, diverse kinds of hydrophilic polymers with different functionalities and organic insoluble matrices have been designed for the morphogenesis of inorganic crystals. In this Research News, emerging new strategies for morphogenesis and controlled crystal growth of minerals, that is, selective adsorption and mesoscale transformation for highly ordered superstructures, the combination of a synthetic hydrophilic polymer with an insoluble matrix, a substrate, or the air/solution interface, and controlled crystallization in a mixed solvent are highlighted. It is shown that these new strategies can be even further extended to morphogenesis and controlled crystallization of diverse inorganic or inorganic-organic hybrid materials with structural complexity, structural specialties, and improved functionalities.
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Affiliation(s)
- Shao-Feng Chen
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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Paik P, Gedanken A, Mastai Y. Chiral-mesoporous-polypyrrole nanoparticles: Its chiral recognition abilities and use in enantioselective separation. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c000232a] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Menahem T, Pravda M, Mastai Y. Correlation between structures of chiral polymers and their efficiency for chiral resolution by crystallization. Chirality 2009; 21:862-70. [DOI: 10.1002/chir.20724] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Paik P, Gedanken A, Mastai Y. Enantioselective separation using chiral mesoporous spherical silica prepared by templating of chiral block copolymers. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1834-1842. [PMID: 20355801 DOI: 10.1021/am9003842] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In this work, we synthesized chiral mesoporous silica (CMS) spheres, which can be used as a potential candidate for chiral separation. The CMS spheres with controllable pore sizes (of 2-3 nm) and high surface areas of ca. 614 m(2) g(-1) were synthesized by chiral templating with chiral block copolymers based on poly(ethylene oxide) and dl-glutamic acid [PEO(113)-b-(GluA)(10)]. The ordered structure of the chiral mesopores was characterized by high-resolution transmission electron microscopy, and the average pore diameters of chiral mesopores were estimated from the nitrogen adsorption-desorption measurements. The enantioselectivity properties and chiral resolution kinetics of the mesopores of silica spheres, after extraction of chiral polymers of PEO(113)-b-(l/d-GluA)(10), were scrutinized using a racemic solution of valine and measuring the circular dichroism and optical polarimetery. A chiral selectivity factor of 5.22 was found with a specific enantiomer of valine adsorbed preferably. These results raise the new possibilities of CMS spheres for enantiomeric separation and other enantioselective applications.
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Affiliation(s)
- Pradip Paik
- Kanbar Laboratory for Nanomaterials and Institute of Nanotechnology, Department of Chemistry, Bar-Ilan University, Ramat Gan 52900, Israel
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23
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Wang X, Kong R, Pan X, Xu H, Xia D, Shan H, Lu JR. Role of Ovalbumin in the Stabilization of Metastable Vaterite in Calcium Carbonate Biomineralization. J Phys Chem B 2009; 113:8975-82. [PMID: 19496561 DOI: 10.1021/jp810281f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoqiang Wang
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao 266555, P.R. China, and Biological Physics Group, School of Physics and Astronomy, University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Rui Kong
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao 266555, P.R. China, and Biological Physics Group, School of Physics and Astronomy, University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Xiaoxiao Pan
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao 266555, P.R. China, and Biological Physics Group, School of Physics and Astronomy, University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Hai Xu
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao 266555, P.R. China, and Biological Physics Group, School of Physics and Astronomy, University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Daohong Xia
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao 266555, P.R. China, and Biological Physics Group, School of Physics and Astronomy, University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Honghong Shan
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao 266555, P.R. China, and Biological Physics Group, School of Physics and Astronomy, University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom
| | - Jian R. Lu
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao 266555, P.R. China, and Biological Physics Group, School of Physics and Astronomy, University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom
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24
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Meldrum FC, Cölfen H. Controlling mineral morphologies and structures in biological and synthetic systems. Chem Rev 2009; 108:4332-432. [PMID: 19006397 DOI: 10.1021/cr8002856] [Citation(s) in RCA: 756] [Impact Index Per Article: 50.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Fiona C Meldrum
- School of Chemistry, Cantock's Close, University of Bristol, Bristol BS8 1TS, United Kingdom.
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25
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Kim YY, Kulak AN, Li Y, Batten T, Kuball M, Armes SP, Meldrum FC. Substrate-directed formation of calcium carbonate fibres. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b813101e] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Bucholz TL, Loo YL(L. Polar Aprotic Solvents Disrupt Interblock Hydrogen Bonding and Induce Microphase Separation in Double Hydrophilic Block Copolymers of PEGMA and PAAMPSA. Macromolecules 2008. [DOI: 10.1021/ma800649x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tracy L. Bucholz
- Department of Chemical Engineering, the University of Texas at Austin, 1 University Station C0400, Austin, Texas 78712, and Department of Chemical Engineering, Princeton University, A217 Engineering Quadrangle, Princeton, New Jersey 08544
| | - Yueh-Lin (Lynn) Loo
- Department of Chemical Engineering, the University of Texas at Austin, 1 University Station C0400, Austin, Texas 78712, and Department of Chemical Engineering, Princeton University, A217 Engineering Quadrangle, Princeton, New Jersey 08544
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27
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Wang G, Li L, Lan J, Chen L, You J. Biomimetic crystallization of calcium carbonate spherules controlled by hyperbranched polyglycerols. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b801943f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Sedlák M, Pravda M, Kubicová L, Mikulcíková P, Ventura K. Synthesis and characterisation of a new pH-sensitive amphotericin B--poly(ethylene glycol)-b-poly(L-lysine) conjugate. Bioorg Med Chem Lett 2007; 17:2554-7. [PMID: 17336066 DOI: 10.1016/j.bmcl.2007.02.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2007] [Revised: 02/01/2007] [Accepted: 02/03/2007] [Indexed: 11/24/2022]
Abstract
This paper reports on the synthesis, characterisation, and efficiency of a new intravenous conjugate of amphotericin B (AMB). Twelve molecules of AMB were attached to block copolymer poly(ethylene glycol)-b-poly(L-lysine) via pH-sensitive imine linkages. In vitro drug release studies demonstrated the conjugate (M(w)=26,700) to be relatively stable in human plasma and in phosphate buffer (pH 7.4, 37 degrees C). Controlled release of AMB was observed in acidic phosphate buffer (pH 5.5, 37 degrees C) with the half-life of 2 min. The LD(50) value determined in vivo (mouse) is 45 mg/kg.
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Affiliation(s)
- Milos Sedlák
- Department of Organic Chemistry, University of Pardubice, Pardubice, Czech Republic.
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Nakashima K, Bahadur P. Aggregation of water-soluble block copolymers in aqueous solutions: recent trends. Adv Colloid Interface Sci 2006; 123-126:75-96. [PMID: 16860770 DOI: 10.1016/j.cis.2006.05.016] [Citation(s) in RCA: 197] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This review summarizes recent literature and some of our own results on aggregation behavior on water-soluble block copolymers belonging to three different classes viz. hydrophilic-hydrophobic (AB, ABA and BAB) block copolymers, double hydrophilic block copolymers (DHBCs) and ABC triblock copolymers. In the case of amphiphilic copolymers, special attention has been focussed on aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers (Pluronics) and their aggregation in aqueous solutions at different temperatures as well as in the presence of various additives. Recent studies based on modern techniques viz. scattering (static and dynamic light scattering and small angle neutron scattering), spectral methods, e.g., fluorescence (static and time resolved), nuclear magnetic resonance and Fourier transform infrared spectroscopies, thermal methods e.g., differential scanning calorimetry and isothermal titration calorimetry, cryotransmission electron microscopy, ultrasonic absorption along with general physical properties like surface tension, viscosity and dye solubilization are summarized. For the DHBCs where one of the blocks is usually a polyion, complex formation by adding oppositely charged ions induces the formation of nanoaggregates. Characterization of such nanoaggregates of polyion complexes of DHBCs and their potential use for incorporation of ionic solutes in the micellar core are reviewed. The formation and characteristics of core-shell-corona micelles of ABC triblock copolymers and their applications as vehicles for controlled drug release are also discussed.
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Affiliation(s)
- Kenichi Nakashima
- Department of Chemistry, Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga 840-8502, Japan
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Guo XH, Yu SH, Cai GB. Crystallization in a Mixture of Solvents by Using a Crystal Modifier: Morphology Control in the Synthesis of Highly Monodisperse CaCO3 Microspheres. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600029] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Guo XH, Yu SH, Cai GB. Crystallization in a Mixture of Solvents by Using a Crystal Modifier: Morphology Control in the Synthesis of Highly Monodisperse CaCO3 Microspheres. Angew Chem Int Ed Engl 2006; 45:3977-81. [PMID: 16673443 DOI: 10.1002/anie.200600029] [Citation(s) in RCA: 139] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiao-Hui Guo
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, School of Chemistry and Materials, University of Science and Technology of China, Hefei 230026, P.R. China.
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Thünemann AF, Schütt D, Sachse R, Schlaad H, Möhwald H. Complexes of poly(ethylene oxide)-block-poly(L-glutamate) and diminazene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:2323-8. [PMID: 16489824 DOI: 10.1021/la0521138] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Nanoparticles with a mean hydrodynamic radius of 16 nm and low polydispersity (P.I. = 0.1) were spontaneously formed by the complexation of poly(ethylene oxide)-block-poly(L-glutamate) (PEO-b-PLGlu) with diminazene. Only one of two possible binding sites of each diminazene molecule was involved in complexation. As determined by UV-vis difference spectra measurements, the complex binding constant is on the order of 1-2 x 10(4) M(-1). Circular dichroism measurements showed that the highly water-soluble diminazene can induce and stabilize the alpha-helical secondary structure of a PLGlu block.
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Affiliation(s)
- Andreas F Thünemann
- Federal Institute for Material Research and Testing, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany.
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Patwardhan SV, Maheshwari R, Mukherjee N, Kiick KL, Clarson SJ. Conformation and Assembly of Polypeptide Scaffolds in Templating the Synthesis of Silica: An Example of a Polylysine Macromolecular “Switch”. Biomacromolecules 2006; 7:491-7. [PMID: 16471921 DOI: 10.1021/bm050717k] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although the role of polycationic macromolecules in catalyzing the synthesis of silica structures is well established, detailed understanding of the mechanisms behind the production of silica structures of controlled morphologies remains unclear. In this study, we have used both poly-L-lysine (PLL) and/or poly-D-lysine (PDL) for silica synthesis to investigate mechanisms controlling inorganic morphologies. The formation of both spherical silica particles and hexagonal plates was observed. The formation of hexagonal plates was suggested, via circular dichroic spectroscopy (CD), to result from the assembly of helical polylysine molecules. We confirm that the formation of PLL helices is a prerequisite to the hexagonal silica synthesis. In addition, we present for the first time that the handedness of the helicity of the macromolecule does not affect the formation of hexagonal silica. We also show, by using two different silica precursors, that the precursor does not have a direct effect on the formation of hexagonal silica plates. Furthermore, when polylysine helices were converted to beta-sheet structure, only silica particles were obtained, thus suggesting that the adoption of a helical conformation by PLL is required for the formation of hexagonally organized silica. These results demonstrate that the change in polylysine conformation can act as a "switch" in silica structure formation and suggest the potential for controlling morphologies and structures of inorganic materials via control of the conformation of soft macromolecular templates.
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Affiliation(s)
- Siddharth V Patwardhan
- Department of Chemical and Material Engineering, University of Cincinnati, Ohio 45221-0012, USA.
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Pispas S. Double hydrophilic block copolymers of sodium(2-sulfamate-3-carboxylate)isoprene and ethylene oxide. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.21196] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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