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Yamamoto T, Masuda Y, Tezuka Y, Korchagina E, Winnik FM. Comparative Thermodynamic Studies of the Micellization of Amphiphilic Block Copolymers before and after Cyclization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5033-5039. [PMID: 35502540 DOI: 10.1021/acs.langmuir.0c03358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The enthalpy and entropy of micellization in water, ΔHmic and ΔSmic, respectively, of three linear amphiphilic BAB block copolymers consisting of either poly(methyl acrylate) (Mn ∼ 1200 and 700 Da) or poly(ethyl acrylate) (Mn ∼ 800 Da) as hydrophobic (B) segments and poly(ethylene oxide) (PEO) as the hydrophilic (A, Mn ∼ 3000 Da) segment were determined by isothermal titration calorimetry (ITC). The ΔHmic and ΔSmic of the cyclic AB block copolymers obtained by cyclization of the linear triblock copolymers were determined under the same conditions. The ΔHmic value of the cyclic copolymers was smaller than that of their linear precursors. The ΔSmic value showed the same trend, but the relative difference between the cyclized and linear copolymers was less pronounced. The hydrodynamic diameter (Dh), critical micelle concentration (CMC), molecular weight (Mw-mic), and second virial coefficient (A2) of the micelles were determined. The Dh value of the cyclic copolymer micelles was smaller than the linear counterpart. On the other hand, the CMC value became larger, whereas the A2 value was comparable or increased by cyclization. Overall, the results suggest that, in the unimer state, the hydrophobic segments of the cyclized copolymers form a tightly coiled structure to minimize contact with water, resulting in the smaller ΔHmic value. Contrary to the linear copolymer micelles, the cyclic copolymer micelles have no "dangling chains", which may explain the topology-driven slight difference in the ΔSmic value.
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Affiliation(s)
- Takuya Yamamoto
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Yuki Masuda
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yasuyuki Tezuka
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Evgeniya Korchagina
- Department of Chemistry and Faculty of Pharmacy, University of Montreal, CP 6128 Succursale Centre Ville, Montreal, Quebec H3C 3J7, Canada
| | - Françoise M Winnik
- Department of Chemistry and Faculty of Pharmacy, University of Montreal, CP 6128 Succursale Centre Ville, Montreal, Quebec H3C 3J7, Canada
- WPI International Center for Materials Nanoarchitectonics (WPI MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Department of Chemistry, Faculty of Science, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
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2
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Solubilization of quercetin in P123 micelles: Scattering and NMR studies. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126555] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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Ben Henda M. Effect of Pyrrolidinium Formate Ionic Liquid on Micellization of Direct and Reverse Pluronics in Aqueous Solutions. J Phys Chem B 2020; 124:5730-5739. [PMID: 32597658 DOI: 10.1021/acs.jpcb.0c01335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The behavior of direct and reverse Pluronic, copolymer nonionic surfactants, poly(ethylene oxide) PEO, and poly(propylene oxide) PPO copolymers, in aqueous solution and in the pyrrolidinium formate ([pyrr][F]) ionic liquid, was investigated using Fourier transform infrared spectroscopy (FTIR spectroscopy). The study was performed for a fixed Pluronic concentration at room temperature. We showed that in aqueous solution, the spectra associated with the direct and reverse Pluronics are similar irrespective of the difference in length of the various PPO and PEO blocks, their positions and the PPO:PEO ratio. The study of those same Pluronics dissolved in a pure pyrrolidinium formate solution showed that the Pluronic types were soluble and that the micellization process can take place at room temperature. The interaction between the Pluronic 10R5 aqueous solutions and the [pyrr][F] for various ionic liquid volumes is reported.
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Affiliation(s)
- M Ben Henda
- Physics Department, College of Science, Al-Zulfi, Majmaah University, Al-Majmaah, 11952, Saudi Arabia.,Physics Laboratory of Soft Matter and Electromagnetic Modelling, Faculty of Sciences of Tunis, Tunis El Manar University 2092 Tunis, Tunisia
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4
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Shaikhullina M, Khaliullina A, Gimatdinov R, Butakov A, Chernov V, Filippov A. NMR relaxation and self-diffusion in aqueous micellar gels of pluronic F-127. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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5
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Pfister S, Sauser L, Gjuroski I, Furrer J, Vermathen M. Monitoring the encapsulation of chlorin e6 derivatives into polymer carriers by NMR spectroscopy. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The encapsulation of five derivatives of chlorin e6 with different hydrophobicity and aggregation properties into a series of five poloxamer-type triblock copolymer micelles (BCMs) with varying numbers of polyethylene and polypropylene glycol (PEG, PPG) units was monitored using 1H NMR spectroscopy. NMR chemical shift and line shape analysis, as well as dynamic methods including diffusion ordered spectroscopy (DOSY) and T1 and T2 relaxation time measurements of the chlorin and the polymer resonances, proved useful to assess the chlorin–BCM compatibility. The poloxamers had high capability to break up aggregates formed by chlorins up to intermediate hydrophobicity. Physically entrapped chlorins were always localized in the BCM core region. The loading capacity correlated with chlorin polarity for all poloxamers among which those with the lowest number of PPG units were most efficient. DOSY data revealed that relatively weakly aggregating chlorins partition between the aqueous bulk and micellar environment whereas more hydrophobic chlorins are well retained in the BCM core region, rendering these systems more stable. T1 and T2 relaxation time measurements indicated that motional freedom in the BCM core region contributes to encapsulation efficiency. The BCM corona dynamics were rather insensitive towards chlorin entrapment except for the poloxamers with short PEG chains. The presented data demonstrate that 1H NMR spectroscopy is a powerful complementary tool for probing the compatibility of porphyrinic compounds with polymeric carriers such as poloxamer BCMs, which is a prerequisite in the development of stable and highly efficient drug delivery systems suitable for medical applications like photodynamic therapy of tumors.
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Affiliation(s)
- Sara Pfister
- University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Luca Sauser
- University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Ilche Gjuroski
- University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Julien Furrer
- University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Martina Vermathen
- University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, CH-3012 Bern, Switzerland
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6
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Singh S, Nanda R, Dorai K. Structural and dynamical aspects of PEG/LiClO 4 in solvent mixtures via NMR spectroscopy. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:412-422. [PMID: 30883938 DOI: 10.1002/mrc.4867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 01/08/2019] [Accepted: 03/10/2019] [Indexed: 06/09/2023]
Abstract
Motivated by the potential usefulness of polyethylene glycol (PEG)/Li+ salt mixtures in several industrial applications, we investigated the structure and dynamics of PEG/LiClO4 mixtures in D2 O and its mixtures with CD3 CN and DMSO-d6 , in a series of PEG-based polymers with a wide variation in their molecular weights. 1 H NMR chemical shifts, T1 /T2 relaxation rates, pulsed-field gradient NMR diffusion experiments, and 2D HOESY NMR studies have been performed to understand the structural and dynamical aspects of these mixtures. Increasing the temperature of the medium results in a significant perturbation in the H-bonded structure of PEG in its PEG/LiClO4 /D2 O mixtures as observed from the increase in chemical shifts. On the other hand, the addition of molecular cosolvents has a negligible effect. The hydrodynamic structure of PEG shows a pronounced variation at low temperature with increasing molecular weight, which, however, disappears at higher temperatures. Increasing the temperature leads to a decrease in the hydrodynamic structure of PEG, which can be explained on the basis of solvation-desolvation phenomena. The 2D HOESY NMR spectra reveal a new finding of Li+ -water binding in the PEG/LiClO4 /D2 O mixtures with the addition of molecular solvents, suggesting that the Li+ cation diffuses freely in the D2 O mixtures of polymers as compared with the polymer mixtures with DMSO or CD3 CN.
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Affiliation(s)
- Satnam Singh
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Mohali, India
| | - Raju Nanda
- Department of Chemistry, Michigan State University, East Lansing, MI
| | - Kavita Dorai
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Mohali, India
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7
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Breitenbach BB, Steiert E, Konhäuser M, Vogt LM, Wang Y, Parekh SH, Wich PR. Double stimuli-responsive polysaccharide block copolymers as green macrosurfactants for near-infrared photodynamic therapy. SOFT MATTER 2019; 15:1423-1434. [PMID: 30662988 DOI: 10.1039/c8sm02204f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The NIR absorbing photosensitizer phthalocyanine zinc (PC(Zn)) was stabilized in aqueous media as water-dispersible nanoparticles with a reduction- and pH-responsive full polysaccharide block copolymer. A cellular uptake and also photo switchable intracellular activity of the cargo upon irradiation at wavelengths in the near infrared region were shown. The block copolymer was synthesized by applying a copper-free click strategy based on a thiol exchange reaction, creating an amphiphilic double-stimuli-responsive mixed disulfide. The dual-sensitive polysaccharide micelles represent a non-toxic and biodegradable green macrosurfactant for the delivery of phthalocyanine zinc. By encapsulation into micellar nanoparticles, the bioavailability of PC(Zn) increased significantly, enabling smart photodynamic therapy for future applications in cancer-related diseases.
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Affiliation(s)
- Benjamin B Breitenbach
- Institut für Pharmazie und Biochemie, Johannes Gutenberg-Universität Mainz, Staudingerweg 5, 55128 Mainz, Germany
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8
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Wei D, Ge L, Guo R. Effect of hydrophilically modified ibuprofen on thermoresponsive gelation of pluronic copolymer. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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9
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Fraenza CC, Mattea C, Farrher GD, Ordikhani-Seyedlar A, Stapf S, Anoardo E. Rouse dynamics in PEO-PPO-PEO block-copolymers in aqueous solution as observed through fast field-cycling NMR relaxometry. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.07.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Fang Y, Giesecke M, Furó I. Complexing Cations by Poly(ethylene oxide): Binding Site and Binding Mode. J Phys Chem B 2017; 121:2179-2188. [PMID: 28198620 DOI: 10.1021/acs.jpcb.6b12381] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The binding of K+ and Ba2+ cations to short poly(ethylene oxide) (PEO) chains with ca. 4-25 monomeric units in methanol was studied by determining the effective charge of the polymer through a combination of electrophoretic NMR and diffusion NMR experiments. These cations were previously found to bind to long PEO chains in a similar strong manner. In addition, 1H chemical shift and longitudinal spin relaxation rate changes upon binding were quantified. For both systems, binding was stronger for the short chains than that for the longer chains, which is attributed mainly to interactions between bound ions. For K+ ions, the equilibrium binding constant of a cation to a binding site was measured. For both cations, the binding site was estimated to consist of ca. six monomeric units that coordinated with the respective ions. For the systems with barium, a significant fraction of the bound ions are (BaAnion)+ ion pairs. This leads to a strong anion effect in the effective charge of the oligomers acquired upon barium ion binding. For K+, the coordinating oligomer segment remains rather mobile and individual oligomers exchange rapidly (≪s) between their free and ion-complexing states. In contrast, segmental dynamics slows significantly for the oligomer section that coordinates with the barium species, and for individual oligomers, binding and nonbinding sections do not exchange on the time scale of seconds. Hence, oligomers also exchange slowly (>s) between their free and barium complexing states.
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Affiliation(s)
- Yuan Fang
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - Marianne Giesecke
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - István Furó
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
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11
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Rayeroux D, Travelet C, Lapinte V, Borsali R, Robin JJ, Bouilhac C. Tunable amphiphilic graft copolymers bearing fatty chains and polyoxazoline: synthesis and self-assembly behavior in solution. Polym Chem 2017. [DOI: 10.1039/c7py00632b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis and self-assembly behavior in solution of tunable copolymers with amphiphilic grafts based on fatty chain polymethacrylate and polyoxazoline.
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Affiliation(s)
- David Rayeroux
- Institut Charles Gerhardt - UMR 5253 CNRS/UM/ENSCM - Ingénierie et Architectures Macromoléculaires
- Université Montpellier
- F-34095 Montpellier Cedex 5
- France
| | | | - Vincent Lapinte
- Institut Charles Gerhardt - UMR 5253 CNRS/UM/ENSCM - Ingénierie et Architectures Macromoléculaires
- Université Montpellier
- F-34095 Montpellier Cedex 5
- France
| | | | - Jean-Jacques Robin
- Institut Charles Gerhardt - UMR 5253 CNRS/UM/ENSCM - Ingénierie et Architectures Macromoléculaires
- Université Montpellier
- F-34095 Montpellier Cedex 5
- France
| | - Cécile Bouilhac
- Institut Charles Gerhardt - UMR 5253 CNRS/UM/ENSCM - Ingénierie et Architectures Macromoléculaires
- Université Montpellier
- F-34095 Montpellier Cedex 5
- France
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12
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Yang C, Chen L, Lu Y, Huang H. Dual thermo- and light-responsive dendron-jacketed homopolymers containing photoswitchable azobenzene groups via a macromonomer route. Polym Chem 2016. [DOI: 10.1039/c6py01582d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel dendron-jacketed homopolymer containing photoswitchable azobenzene groups and short oligo(ethylene glycol) (OEG) units was synthesized via a macromonomer route, which can exhibit interesting dual thermo- and light-responsive behaviours.
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Affiliation(s)
- ChangAn Yang
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
| | - Ling Chen
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
| | - Ying Lu
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
| | - He Huang
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- P. R China
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13
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Quirion F. Activation Thermodynamics and Concentration Scaling of the Viscosity of Unimeric and Aggregated Poloxamer EO 93PO 54EO 93 in Water. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- François Quirion
- Consultant R&D Physicochimie, 261 Boulevard Pereire, 75017 Paris, France
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14
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Zhang M, Vora A, Han W, Wojtecki RJ, Maune H, Le ABA, Thompson LE, McClelland GM, Ribet F, Engler AC, Nelson A. Dual-Responsive Hydrogels for Direct-Write 3D Printing. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01550] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Musan Zhang
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Ankit Vora
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Wei Han
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Rudy J. Wojtecki
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Hareem Maune
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Alexander B. A. Le
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Leslie E. Thompson
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Gary M. McClelland
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Federico Ribet
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Amanda C. Engler
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Alshakim Nelson
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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15
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Wada H, Kitazawa Y, Kuroki S, Tezuka Y, Yamamoto T. NMR Relaxometry for the Thermal Stability and Phase Transition Mechanism of Flower-like Micelles from Linear and Cyclic Amphiphilic Block Copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8739-8744. [PMID: 26230670 DOI: 10.1021/acs.langmuir.5b01902] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Linear and cyclic amphiphilic block copolymers consisting of poly(ethylene oxide) (PEO) as the hydrophilic segment and poly(methyl acrylate) or poly(ethyl acrylate) as the hydrophobic segments were synthesized and self-assembled to form flower-like micelles. The micelles from linear (methyl acrylate)12(ethylene oxide)73(methyl acrylate)12 (Mn = 1000-3200-1000, l-MOM) showed a cloud point (Tc) at 46 °C by the transmittance of the micellar solution, whereas that of cyclic (methyl acrylate)30(ethylene oxide)79 (Mn = 2600-3500, c-MO) increased to 72 °C, as previously reported. DLS showed comparable diameters (l-MOM, 14 nm; c-MO, 12 nm) and Tc values (l-MOM, 48 °C; c-MO, 75 °C). For the investigation of the difference in Tc and the phase transition mechanism based on the polymer topology, NMR relaxometry was performed to determine the spin-lattice (T1) and spin-spin (T2) relaxation times. A decrease in T2 of the PEO segment in both l-MOM and c-MO was observed above Tc, suggesting that slow large-scale motions, such as the detachment of a chain end from the core, bridging, and interpenetration of the micelles, were inhibited. T1 of the PEO segment in l-MOM continuously increased in the experimental temperature range, indicating that the segment is hydrated even above its Tc. On the other hand, that of c-MO reached a ceiling above its Tc, likely due to the prevention of the rotation of the PEO main chain bonds caused by dehydration. Similar results were obtained for linear (ethyl acrylate)8(ethylene oxide)79(ethyl acrylate)8 (Mn = 800-3500-800, l-EOE) and its cyclic (ethyl acrylate)15(ethylene oxide)78 (Mn = 1500-3400, c-EO).
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Affiliation(s)
- Haruna Wada
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yu Kitazawa
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shigeki Kuroki
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yasuyuki Tezuka
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takuya Yamamoto
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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16
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Hiller W, Engelhardt N, Kampmann AL, Degen P, Weberskirch R. Micellization and Mobility of Amphiphilic Poly(2-oxazoline) Based Block Copolymers Characterized by 1H NMR Spectroscopy. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00149] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Wolf Hiller
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
| | - Nadine Engelhardt
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
| | - Anne-Larissa Kampmann
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
| | - Patrick Degen
- Center
for Synchrotron Radiation (DELTA), TU Dortmund, Maria-Goeppert-Meyer-Str. 2, D-44227 Dortmund, Germany
| | - Ralf Weberskirch
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
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17
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Effects of the PEG molecular weight of a PEG-lipid and cholesterol on PEG chain flexibility on liposome surfaces. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Weiss J, Wienk H, Boelens R, Laschewsky A. Block Copolymer Micelles with an Intermediate Star-/Flower-Like Structure Studied by1H NMR Relaxometry. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201300753] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jan Weiss
- Institute Charles Sadron; UPR22-CNRS; 23 Rue de Loess 67034 Strasbourg Cedex 2 France
| | - Hans Wienk
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Utrecht University; Padualaan 8 3584CH Utrecht The Netherlands
| | - Rolf Boelens
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Utrecht University; Padualaan 8 3584CH Utrecht The Netherlands
| | - André Laschewsky
- Department of Chemistry; University of Potsdam; Karl-Liebknecht-Strasse 24-25 14476 Potsdam-Golm Germany
- Fraunhofer Institute for Applied Polymer Research; Geiselbergstrasse 69 14476 Potsdam-Golm Germany
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He J, Tremblay L, Lacelle S, Zhao Y. How can photoisomerization of azobenzene induce a large cloud point temperature shift of PNIPAM? Polym Chem 2014. [DOI: 10.1039/c4py00546e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a comprehensive study of the photo-induced phase transition of azobenzene-containing poly(N-isopropylacrylamide) (PNIPAM) in block copolymers (BCPs) upon the isomerization of azobenzene in the mixed solvent of water and dioxane.
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Affiliation(s)
- Jie He
- Département de chimie
- Université de Sherbrooke
- Sherbrooke, Canada J1K 2R1
- Department of Chemistry
- University of Connecticut
| | - Luc Tremblay
- Département de médecine nucléaire et de radiobiologie and Centre d'imagerie moléculaire de Sherbrooke
- Université de Sherbrooke
- Sherbrooke, Canada J1K 2R1
| | - Serge Lacelle
- Département de chimie
- Université de Sherbrooke
- Sherbrooke, Canada J1K 2R1
| | - Yue Zhao
- Département de chimie
- Université de Sherbrooke
- Sherbrooke, Canada J1K 2R1
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20
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Kashyap S, Jayakannan M. Thermo-responsive and shape transformable amphiphilic scaffolds for loading and delivering anticancer drugs. J Mater Chem B 2014; 2:4142-4152. [DOI: 10.1039/c4tb00134f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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21
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Yeon B, Park MH, Moon HJ, Kim SJ, Cheon YW, Jeong B. 3D Culture of Adipose-Tissue-Derived Stem Cells Mainly Leads to Chondrogenesis in Poly(ethylene glycol)-Poly(l-alanine) Diblock Copolymer Thermogel. Biomacromolecules 2013; 14:3256-66. [DOI: 10.1021/bm400868j] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Bora Yeon
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Min Hee Park
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Hyo Jung Moon
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Seung-Jin Kim
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Young Woo Cheon
- Department of Plastic
and Reconstructive Surgery, Gachon University Gil Medical Center, Incheon, Korea
| | - Byeongmoon Jeong
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
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22
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Jung YK, Park MH, Moon HJ, Shinde UP, Jeong B. Changes in Nanoassembly of Oligocaprolactone End-Capped Pluronic F127 and the Abnormal Hydrophobicity Trend of Phase Transition. Macromolecules 2013. [DOI: 10.1021/ma400268r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yu Kyung Jung
- Department of Chemistry
and Nano Science, Department
of Bioinspired Science (WCU), Global Top 5 Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul 120-750, Korea
| | - Min Hee Park
- Department of Chemistry
and Nano Science, Department
of Bioinspired Science (WCU), Global Top 5 Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul 120-750, Korea
| | - Hyo Jung Moon
- Department of Chemistry
and Nano Science, Department
of Bioinspired Science (WCU), Global Top 5 Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul 120-750, Korea
| | - Usha Pramod Shinde
- Department of Chemistry
and Nano Science, Department
of Bioinspired Science (WCU), Global Top 5 Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul 120-750, Korea
| | - Byeongmoon Jeong
- Department of Chemistry
and Nano Science, Department
of Bioinspired Science (WCU), Global Top 5 Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul 120-750, Korea
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23
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Singh V, Khullar P, Dave PN, Kaur N. Micelles, mixed micelles, and applications of polyoxypropylene (PPO)-polyoxyethylene (PEO)-polyoxypropylene (PPO) triblock polymers. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2013. [DOI: 10.1186/2228-5547-4-12] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
This review gives a brief outline of various micellar properties of triblock polymers such as critical micellization concentration, critical micellization temperature, and microviscosity. Detailed discussion of the effect of temperature on micellar properties of various triblock polymer mixtures is given. Applications of triblock polymers in solubilization as drug delivery agents, as nano drug, for the synthesis of gold nanoparticles, for cobalt determination, etc. are discussed.
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24
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Prameela GKS, Phani Kumar BVN, Aswal VK, Mandal AB. Influence of water-insoluble nonionic copolymer E6P39E6 on the microstructure and self-aggregation dynamics of aqueous SDS solution—NMR and SANS investigations. Phys Chem Chem Phys 2013; 15:17577-86. [DOI: 10.1039/c3cp52265b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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25
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Kirkeminde AW, Torres T, Ito T, Higgins DA. Multiple Diffusion Pathways in Pluronic F127 Mesophases Revealed by Single Molecule Tracking and Fluorescence Correlation Spectroscopy. J Phys Chem B 2011; 115:12736-43. [DOI: 10.1021/jp208234b] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alec W. Kirkeminde
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-0401, United States
| | - Travis Torres
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-0401, United States
| | - Takashi Ito
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-0401, United States
| | - Daniel A. Higgins
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-0401, United States
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26
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Tan WS, Zhu Z, Sukhishvili SA, Rubner MF, Cohen RE. Effect of Block Copolymer Architecture on the Thermally Induced Swelling of Micelle-Containing Multilayer Thin Films. Macromolecules 2011. [DOI: 10.1021/ma201397d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wui Siew Tan
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Zhichen Zhu
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Svetlana A. Sukhishvili
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Michael F. Rubner
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Robert E. Cohen
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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27
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de Graaf AJ, Boere KWM, Kemmink J, Fokkink RG, van Nostrum CF, Rijkers DTS, van der Gucht J, Wienk H, Baldus M, Mastrobattista E, Vermonden T, Hennink WE. Looped structure of flowerlike micelles revealed by 1H NMR relaxometry and light scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:9843-9848. [PMID: 21755924 DOI: 10.1021/la2019605] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present experimental proof that so-called "flowerlike micelles" exist and that they have some distinctly different properties compared to their "starlike" counterparts. Amphiphilic AB diblock and BAB triblock copolymers consisting of poly(ethylene glycol) (PEG) as hydrophilic A block and thermosensitive poly(N-isopropylacrylamide) (pNIPAm) B block(s) were synthesized via atom transfer radical polymerization (ATRP). In aqueous solutions, both block copolymer types form micelles above the cloud point of pNIPAm. Static and dynamic light scattering measurements in combination with NMR relaxation experiments proved the existence of flowerlike micelles based on pNIPAm(16kDa)-PEG(4kDa)-pNIPAm(16kDa) which had a smaller radius and lower mass and aggregation number than starlike micelles based on mPEG(2kDa)-pNIPAm(16kDa). Furthermore, the PEG surface density was much lower for the flowerlike micelles, which we attribute to the looped configuration of the hydrophilic PEG block. (1)H NMR relaxation measurements showed biphasic T(2) relaxation for PEG, indicating rigid PEG segments close to the micelle core and more flexible distal segments. Even the flexible distal segments were shown to have a lower mobility in the flowerlike micelles compared to the starlike micelles, indicating strain due to loop formation. Taken together, it is demonstrated that self-assemblies of BAB triblock copolymers have their hydrophilic block in a looped conformation and thus indeed adopt a flowerlike conformation.
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Affiliation(s)
- Albert J de Graaf
- Utrecht Institute for Pharmaceutical Sciences, Pharmaceutics, Utrecht University, P.O. Box 80.082, 3508TB Utrecht, The Netherlands
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28
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Phani Kumar B, Umayal Priyadharsini S, Prameela G, Mandal AB. NMR investigations of self-aggregation characteristics of SDS in a model assembled tri-block copolymer solution. J Colloid Interface Sci 2011; 360:154-62. [DOI: 10.1016/j.jcis.2011.04.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 03/29/2011] [Accepted: 04/07/2011] [Indexed: 11/25/2022]
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29
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Cha MH, Choi J, Choi BG, Park K, Kim IH, Jeong B, Han DK. Synthesis and characterization of novel thermo-responsive F68 block copolymers with cell-adhesive RGD peptide. J Colloid Interface Sci 2011; 360:78-85. [DOI: 10.1016/j.jcis.2011.04.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 04/08/2011] [Accepted: 04/09/2011] [Indexed: 10/18/2022]
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30
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Wilmes GM, Arnold DJ, Kawchak KS. Effect of chain rigidity on block copolymer micelle formation and dissolution as observed by 1H-NMR spectroscopy. JOURNAL OF POLYMER RESEARCH 2011. [DOI: 10.1007/s10965-011-9585-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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31
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Kyeremateng SO, Busse K, Kohlbrecher J, Kressler J. Synthesis and Self-Organization of Poly(propylene oxide)-Based Amphiphilic and Triphilic Block Copolymers. Macromolecules 2011. [DOI: 10.1021/ma102232z] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samuel O. Kyeremateng
- Department of Chemistry, Martin Luther University, von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany
| | - Karsten Busse
- Department of Chemistry, Martin Luther University, von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany
| | | | - Jörg Kressler
- Department of Chemistry, Martin Luther University, von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany
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32
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Fluorescence of commercial Pluronic F127 samples: Temperature-dependent micellization. J Colloid Interface Sci 2010; 354:662-9. [PMID: 21087773 DOI: 10.1016/j.jcis.2010.10.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2010] [Revised: 10/11/2010] [Accepted: 10/13/2010] [Indexed: 11/22/2022]
Abstract
We present a novel approach of using the butylated hydroxytoluene (BHT) antioxidant found in commercial Pluronic F127 samples as a marker of polymer aggregation. The BHT marker was compared to the pyrene dye and static light scattering methods as a way to measure the critical micelle concentration (CMC) and critical micelle temperature (CMT). The n→π(∗) transitions of BHT are sensitive to the microenvironment as demonstrated by plotting the fractional intensities of its excitation (≈280nm) and emission (≈325nm) peaks. BHT is more sensitive to changes in temperature than concentration. The partition coefficient increases ≈40-fold for pyrene compared to ≈2-fold for BHT when the temperature is increased from 25 to 37°C. CMT values determined using the BHT fluorescence decrease with increasing F127 concentration. Our results show that BHT can be used as a reliable marker of changes in the microenvironment of Pluronic F127.
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33
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Yang L, Qi X, Liu P, El Ghzaoui A, Li S. Aggregation behavior of self-assembling polylactide/poly(ethylene glycol) micelles for sustained drug delivery. Int J Pharm 2010; 394:43-9. [DOI: 10.1016/j.ijpharm.2010.04.030] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 04/20/2010] [Accepted: 04/21/2010] [Indexed: 11/26/2022]
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34
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Kyeremateng SO, Henze T, Busse K, Kressler J. Effect of Hydrophilic Block-A Length Tuning on the Aggregation Behavior of α,ω-Perfluoroalkyl End-Capped ABA Triblock Copolymers in Water. Macromolecules 2010. [DOI: 10.1021/ma902753y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Samuel O. Kyeremateng
- Faculty of Chemistry and Physics, Martin Luther University, Von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany
| | - Thomas Henze
- Faculty of Chemistry and Physics, Martin Luther University, Von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany
| | - Karsten Busse
- Faculty of Chemistry and Physics, Martin Luther University, Von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany
| | - Jörg Kressler
- Faculty of Chemistry and Physics, Martin Luther University, Von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany
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35
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Kloxin CJ, van Zanten JH. High Pressure Phase Diagram of an Aqueous PEO-PPO-PEO Triblock Copolymer System via Probe Diffusion Measurements. Macromolecules 2010. [DOI: 10.1021/ma902571h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher J. Kloxin
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905
| | - John H. van Zanten
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905
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36
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What can isothermal titration microcalorimetry experiments tell us about the self-organization of surfactants into micelles? J Mol Recognit 2009; 23:335-42. [DOI: 10.1002/jmr.998] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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37
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Tomatsu I, Hashidzume A, Harada A. Photo-Polymerization of AmphiphilicN,O-diacylated Serine-Based Monomers in their Micellar States for an Encapsulation. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200900206] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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Bouchemal K, Agnely F, Koffi A, Ponchel G. A concise analysis of the effect of temperature and propanediol-1, 2 on Pluronic F127 micellization using isothermal titration microcalorimetry. J Colloid Interface Sci 2009; 338:169-76. [DOI: 10.1016/j.jcis.2009.05.075] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2009] [Revised: 05/28/2009] [Accepted: 05/29/2009] [Indexed: 10/20/2022]
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39
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Zhang W, Dong G, Yang H, Sun J, Zhou J, Wang J. Synthesis, surface and aggregation properties of a series of amphiphilic dendritic copolymers. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.06.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Yu H, Gu X, Shen X, Li Y, Duan Y. Synthesis and characterization of biodegradable block copolymer pluronic-b-poly(L-lysine). J Appl Polym Sci 2009. [DOI: 10.1002/app.29643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Kohut A, Voronov A. Hierarchical micellar structures from amphiphilic invertible polyesters: 1H NMR spectroscopic study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:4356-4360. [PMID: 19309118 DOI: 10.1021/la900700u] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The environment-dependent behavior of invertible polyesters has been studied by 1H NMR spectroscopy. In dilute toluene solutions, the micelle exterior is made up of the lipophilic fragments, and the interior consists of the hydrophilic constituents. The polyester inverts the structure in an aqueous medium to form micelles with a hydrophobic inner part and a hydrophilic outer part. Increasing polyester concentration leads to the formation of hierarchical structures both in toluene and in an aqueous medium as a result of the aggregation of unimolecular micelles and the formation of hydrophilic and lipophilic domains. On the contrary, no unimolecular micelles or micellar aggregation has been observed in acetone or chloroform.
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Affiliation(s)
- Ananiy Kohut
- Department of Coatings & Polymeric Materials, North Dakota State University, Fargo, North Dakota, USA
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42
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Ren Y, Jiang X, Yin J. Poly(ethertert-amine): A novel family of multiresponsive polymer. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23235] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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43
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Parry A, Bomans P, Holder S, Sommerdijk N, Biagini S. Cryo Electron Tomography Reveals Confined Complex Morphologies of Tripeptide-Containing Amphiphilic Double-Comb Diblock Copolymers. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802834] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Parry A, Bomans P, Holder S, Sommerdijk N, Biagini S. Cryo Electron Tomography Reveals Confined Complex Morphologies of Tripeptide-Containing Amphiphilic Double-Comb Diblock Copolymers. Angew Chem Int Ed Engl 2008; 47:8859-62. [DOI: 10.1002/anie.200802834] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Solid-State NMR Study on the Structure and Dynamics of Triblock Copolymer P123 Remaining in SBA-15 after Solvent Washing. B KOREAN CHEM SOC 2008. [DOI: 10.5012/bkcs.2008.29.5.911] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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46
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Rao J, Luo Z, Ge Z, Liu H, Liu S. “Schizophrenic” Micellization Associated with Coil-to-Helix Transitions Based on Polypeptide Hybrid Double Hydrophilic Rod–Coil Diblock Copolymer. Biomacromolecules 2007; 8:3871-8. [DOI: 10.1021/bm700830b] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jingyi Rao
- Department of Polymer Science and Engineering, Joint Laboratory of Polymer Thin Films and Solution, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province 230026, China
| | - Zhaofeng Luo
- Department of Polymer Science and Engineering, Joint Laboratory of Polymer Thin Films and Solution, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province 230026, China
| | - Zhishen Ge
- Department of Polymer Science and Engineering, Joint Laboratory of Polymer Thin Films and Solution, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province 230026, China
| | - Hao Liu
- Department of Polymer Science and Engineering, Joint Laboratory of Polymer Thin Films and Solution, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province 230026, China
| | - Shiyong Liu
- Department of Polymer Science and Engineering, Joint Laboratory of Polymer Thin Films and Solution, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province 230026, China
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47
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Ma J, Guo C, Tang Y, Xiang J, Chen S, Wang J, Liu H. Micellization in aqueous solution of an ethylene oxide–propylene oxide triblock copolymer, investigated with 1H NMR spectroscopy, pulsed-field gradient NMR, and NMR relaxation. J Colloid Interface Sci 2007; 312:390-6. [PMID: 17482638 DOI: 10.1016/j.jcis.2007.03.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Revised: 03/07/2007] [Accepted: 03/11/2007] [Indexed: 11/21/2022]
Abstract
(1)H nuclear magnetic resonance (NMR) spectroscopy has been applied to study the temperature and concentration-induced micellization of a poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) triblock copolymer, Pluronic P105, in D(2)O solutions in the temperature range from 5 to 45 degrees C and the concentration range from 0.01 to 15% (w/v). The intrinsic probes, the chemical shift, and the half-height width of the PO CH(3) signal are very sensitive to the local environment and can be used to characterize the temperature and concentration-dependent aggregation process. When the temperature approaches the critical micellization temperature or the polymer concentration reaches the critical micellization concentration, the chemical shift of the PO CH(3) signal moves toward lower ppm values and the half-height width of the PO CH(3) signal shows a sudden increase. It indicates that the methyl groups are experiencing a progressively less polar environment and transferring from water to the hydrophobic micellar core. The hydrodynamic radius of the unimers and the micelles are determined as be 1.8 and 5.0 nm by means of pulsed-field gradient spin-echo (PGSE) NMR. They were independent of temperature and concentration. The drastic shortening of spin-lattice relaxation time T(1) for the PO CH(3)/CH(2) protons in the transition region suggested that the PPO blocks are located in a "liquid-like" micellar core, whereas the exponential increase of T(1) for the PEO CH(2) protons implied that the PEO blocks are still keeping in contact with surrounding water. Thermodynamics analysis according to a closed association model shows that the micellization process is entropy-driven and has an endothermic micellization enthalpy.
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Affiliation(s)
- Junhe Ma
- Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, Beijing 100080, China
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48
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Bharatiya B, Guo C, Ma J, Hassan P, Bahadur P. Aggregation and clouding behavior of aqueous solution of EO–PO block copolymer in presence of n-alkanols. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2007.02.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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Zhang Y, Lam YM. Controlled synthesis and association behavior of graft Pluronic in aqueous solutions. J Colloid Interface Sci 2007; 306:398-404. [PMID: 17161416 DOI: 10.1016/j.jcis.2006.10.073] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Revised: 10/26/2006] [Accepted: 10/27/2006] [Indexed: 11/19/2022]
Abstract
Poly(vinyl pyrrolidone) (PVP) was grafted onto Pluronic F127 (PEO-PPO-PEO) to produce novel amphiphilic PVP-g-F127 graft copolymers. A controlled synthesis method was used to graft PVP onto different parts of F127. Two types of graft polymers were obtained: one has PVP grafted onto the PEO part of F127 and the other has PVP grafted onto the PPO part of F127. The association behavior of the two modified polymers was examined using differential scanning calorimetry, surface tension measurements, and dynamic light scattering.
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Affiliation(s)
- Y Zhang
- School of Material Science and Engineering, Nanyang Technological University, Nanyang Drive, 639798 Singapore
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50
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Iqbal M, Chung YI, Tae G. An enhanced synthesis of gold nanorods by the addition of Pluronic (F-127) via a seed mediated growth process. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b610761c] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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