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Li G, Lv K, Cheng Q, Xing H, Xue W, Zhang W, Lin Q, Ma D. Enhanced Bacterial-Infected Wound Healing by Nitric Oxide-Releasing Topological Supramolecular Nanocarriers with Self-Optimized Cooperative Multi-Point Anchoring. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206959. [PMID: 36793143 PMCID: PMC10104656 DOI: 10.1002/advs.202206959] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Polymeric systems that provide cationic charges or biocide-release therapeutics are used to treat the bacteria-infected wound. However, most antibacterial polymers based on topologies with restricted molecular dynamics still do not satisfy the clinical requirements due to their limited antibacterial efficacy at safe concentrations in vivo. Here a NO-releasing topological supramolecular nanocarrier with rotatable and slidable molecular entities is reported to provide conformational freedom to promote the interactions between the carrier and the pathogenic microbes, hence greatly improving the antibacterial performance. With improved contacting-killing and efficient delivery of NO biocide from the molecularly dynamic cationic ligand design, the NO-loaded topological nanocarrier achieves excellent antibacterial and anti-biofilm effects via destroying the bacterial membrane and DNA. MRSA-infected rat model is also brought out to demonstrate its wound-healing effect with neglectable toxicity in vivo. Introducing flexible molecular motions into therapeutic polymeric systems is a general design to enhance the healing of a range of diseases.
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Affiliation(s)
- Guowei Li
- Department of Nuclear Medicine and PET/CT‐MRI CenterThe First Affiliated Hospital of Jinan UniversityGuangzhou510630China
- Key Laboratory of Biomaterials of Guangdong Higher Education InstitutesDepartment of Biomedical EngineeringJinan UniversityGuangzhou510632China
| | - Kai Lv
- Key Laboratory of Biomaterials of Guangdong Higher Education InstitutesDepartment of Biomedical EngineeringJinan UniversityGuangzhou510632China
| | - Qikun Cheng
- Key Laboratory of Biomaterials of Guangdong Higher Education InstitutesDepartment of Biomedical EngineeringJinan UniversityGuangzhou510632China
| | - Hui Xing
- Key Laboratory of Biomaterials of Guangdong Higher Education InstitutesDepartment of Biomedical EngineeringJinan UniversityGuangzhou510632China
| | - Wei Xue
- Key Laboratory of Biomaterials of Guangdong Higher Education InstitutesDepartment of Biomedical EngineeringJinan UniversityGuangzhou510632China
| | - Wu Zhang
- The First Affiliated Hospital of Jinan UniversityJinan UniversityGuangzhou510630China
- School of Stomatology of Jinan UniversityJinan UniversityGuangzhou510632China
| | - Qianming Lin
- School of Biomedical EngineeringSun Yat‐sen University, Shenzhen CampusShenzhen518107China
- School of Biomedical EngineeringSun Yat‐sen UniversityGuangzhou510006China
| | - Dong Ma
- Key Laboratory of Biomaterials of Guangdong Higher Education InstitutesDepartment of Biomedical EngineeringJinan UniversityGuangzhou510632China
- MOE Key Laboratory of Tumor Molecular BiologyJinan UniversityGuangzhou510632China
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2
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Kalaw JM, Shigemitsu H, Kida T. 2- O-Methylated β-Cyclodextrin as an Effective Building Block to Construct Supramolecular Assemblies with Various Morphologies and Molecular Arrangements. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8407-8415. [PMID: 35762563 DOI: 10.1021/acs.langmuir.2c00980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The preparation of supramolecular cyclodextrin (CD) assemblies and control of their assembly mode through guest inclusion in CD cavities have been actively studied. Contrarily, there are limited reports on the control of the assembly mode of guest-free CD molecules by external stimuli. Herein, we report the use of 2-O-methylated β-cyclodextrin (2-Me-β-CD) as an effective building block in fabricating supramolecular assemblies with diverse morphologies and molecular arrangements through assembly mode control by various stimuli, such as temperature and solvent. When methanol and diethyl carbonate were used as good and poor solvents, respectively, 2-Me-β-CD formed an amorphous assembly through solvent evaporation on a polyethylene terephthalate (PET) substrate. Increasing the drying temperature and using crystalline substrates, such as highly oriented pyrolytic graphite (HOPG) and sapphire, changed the assembly mode of 2-Me-β-CD to a head-to-tail channel assembly. However, when a 2-Me-β-CD/1-propanol solution was mixed with linear alkanes as a poor solvent, 2-Me-β-CD with head-to-head channel assembly was formed as a precipitate. Additionally, when the corresponding cyclic alkane was used as an alternative poor solvent, an organogel composed of 2-Me-β-CD with head-to-head channel assemblies was obtained. The organogel obtained became a precipitate composed of 2-Me-β-CD with cage-type assembly upon heating at 50 °C. Among the supramolecular assemblies fabricated in this study, the head-to-tail channel assembly is a rare molecular assembly of β-CD and its derivatives. It possesses a modified columnar cavity that has potential applications in molecular recognition and sensing.
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Affiliation(s)
- Justine M Kalaw
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
| | - Hajime Shigemitsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
- Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
| | - Toshiyuki Kida
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
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Guembe-Michel N, Durán A, Sirera R, González-Gaitano G. Solvent-Free Formation of Cyclodextrin-Based Pseudopolyrotaxanes of Polyethylene Glycol: Kinetic and Structural Aspects. Int J Mol Sci 2022; 23:ijms23020685. [PMID: 35054867 PMCID: PMC8775932 DOI: 10.3390/ijms23020685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/03/2022] [Accepted: 01/05/2022] [Indexed: 01/27/2023] Open
Abstract
Pseudopolyrotaxanes (PPRs) are supramolecular structures consisting of macrocycles able to thread on a linear polymer chain in a reversible, non-covalent way, often referred to in the literature as “molecular necklaces”. While the synthesis and reaction mechanisms of these structures in solution have been widely described, their solvent-free production has received little attention, despite the advantages that this route may offer. We propose in this work a kinetic mechanism that describes the PPR formation in the solid phase as a process occurring in two consecutive stages. This mechanism has been used to investigate the spontaneous formation of a PPR that occurs when grinding α-Cyclodextrin (α-CD) with polyethylene glycol (PEG). In the threading stage, the inclusion of the polymer and subsequent release of the water molecules lodged in the cavity of the macrocycle cause vibrational changes that are reflected in the time-dependence of the FTIR-ATR spectra, while the further assembly of PPRs to form crystals produces characteristic reflections in the XRD patterns, due to the channel-like arrangement of CDs, that can be used to track the formation of the adduct in crystalline form. The effects that working variables have on the kinetics of the reaction, such as temperature, feed ratio, molar mass of the polymer and the introduction of an amorphous block in the polymer structure, have been investigated. The rate constants of the threading step increase with the temperature and the activation energy of the process increases at lower proportions of CD to PEG. This is attributed to the lower degree of covering of the polymer chain with CDs that reduces the hydrogen-bonding driven stabilization between adjacent macrocycles. The formation of crystalline PPR, which takes place slowly at room temperature, is markedly promoted at higher temperatures, with lower proportions of CD favoring both the formation and the growth of the crystals. The molar mass of the polymer does not modify the typical channel-like arrangement of packed PPRs but the conversion into crystalline PPR diminishes when using PEG1000 instead of PEG400. At a microscopic level, the crystals arrange into lamellar structures, in the order of hundreds of nm, embedded in an amorphous-like matrix. The introduction of a polypropylene oxide block in the structure of the polymer (Pluronic L62) renders poorer yields and a considerable loss of crystallinity of the product of the reaction. The methodology here proposed can be applied to the general case of inclusion complexes of CDs with drugs in the solid phase, or to multicomponent systems that contain polymers as excipients in pharmaceutical formulations along with CDs.
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Uenuma S, Endo K, Yamada NL, Yokoyama H, Ito K. Polymer Brush Formation Assisted by the Hierarchical Self-Assembly of Topological Supramolecules. ACS APPLIED MATERIALS & INTERFACES 2021; 13:60446-60453. [PMID: 34874694 DOI: 10.1021/acsami.1c18720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The development of methods for the polymer brush layer formation on material surfaces to improve the surface properties has been researched for decades. Here, we report a novel approach for the formation of a polymer brush layer on materials and the alteration of the surface properties using a pseudo-polyrotaxane nanosheet (PPRNS). In the PPRNS, β-cyclodextrin (CD) selectively covered the central poly(propylene oxide)29 segment of the carboxyl-terminated poly(ethylene oxide)75-b-poly(propylene oxide)29-b-poly(ethylene oxide)75 (COOH-EO75PO29EO75) triblock copolymer to form columnar crystals. The EO chains of COOH-EO75PO29EO75 then adopt polymer brush conformations and exhibit an oil-repellent property on the material surfaces. Based on the flexibility derived from the nanosheet structure, the PPRNS showed high adhesion to the Blu-ray disk substrate (1D bending), polystyrene spherical beads (2D bending), and random rough surface of pork skin. The PPRNS is expected to become a new method for obtaining polymer brush layers and improving the surface properties irrespective of the material type.
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Affiliation(s)
- Shuntaro Uenuma
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
- Material Innovation Research Center (MIRC), Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Kimika Endo
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Norifumi L Yamada
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Ibaraki 319-1106, Japan
| | - Hideaki Yokoyama
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Kohzo Ito
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
- Material Innovation Research Center (MIRC), Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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Masai H, Oka Y, Terao J. Precision synthesis of linear oligorotaxanes and polyrotaxanes achieving well-defined positions and numbers of cyclic components on the axle. Chem Commun (Camb) 2021; 58:1644-1660. [PMID: 34927653 DOI: 10.1039/d1cc03507j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Interest in macromolecules has increased because of their functional properties, which can be tuned using precise organic synthetic methods. For example, desired functions have been imparted by controlling the nanoscale structures of such macromolecules. In particular, compounds with interlocked structures, including rotaxanes, have attracted attention because of their unique supramolecular structures. In such supramolecular structures, the mobility and freedom of the macrocycles are restricted by an axle and dependent on those of other macrocycles, which imparts unique functions to these threaded structures. Recently, methods for the ultrafine engineering and synthesis, as well as functions, of "defined" rotaxane structures that are not statistically dispersed on the axle (i.e., control over the number and position of cyclic molecules) have been reported. Various synthetic strategies allow access to such well-defined linear oligo- and polyrotaxanes, including [1]rotaxanes and [n]rotaxanes (mostly n > 3). These state-of-the-art synthetic methods have resulted in unique functions of these oligo-and polyrotaxane materials. Herein, we review the effective synthetic protocols and functions of precisely constructed one-dimensional oligomers and polymers bearing defined threaded structures, and discuss the latest reports and trends.
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Affiliation(s)
- Hiroshi Masai
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Japan.
| | - Yuki Oka
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Japan.
| | - Jun Terao
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Japan.
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Uenuma S, Maeda R, Yokoyama H, Ito K. Molecular Recognition of Fluorescent Probe Molecules with a Pseudopolyrotaxane Nanosheet. ACS Macro Lett 2021; 10:237-242. [PMID: 35570789 DOI: 10.1021/acsmacrolett.0c00660] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Pseudopolyrotaxane nanosheets (PPRNS) are ultrathin two-dimensional (2D) materials fabricated via supramolecular self-assembly of β-cyclodextrin (β-CD) and poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) triblock copolymers. In this study, the molecular loading of various fluorescent probe molecules onto PPRNS was systematically investigated. 1H NMR study for R6G absorption to PPRNS indicated that the small hydrophobic groups, such as the methyl group, of R6G were absorbed by PPRNS. Consistently, the fluorescent probes without methyl groups were not absorbed. These results indicate that PPRNS has a molecular recognition absorption property based on the host-guest interaction of the functional groups on probe molecules and molecular-sized spaces of PPRNS surfaces, which may be vacant β-CDs and voids between β-CD columns. The absorbed amount of the molecular probes onto PPRNS was investigated by UV-vis spectra, and the absorption behavior could be described well by the Langmuir absorption isotherm. This is consistent with the suggested model that the probes are absorbed onto the PPRNS surfaces. This study demonstrates that PPRNSs can be applied as adsorbents for toxic compounds, drug delivery systems, and 2D sensors.
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Affiliation(s)
- Shuntaro Uenuma
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa City, Chiba 277-8561, Japan
| | - Rina Maeda
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa City, Chiba 277-8561, Japan
| | - Hideaki Yokoyama
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa City, Chiba 277-8561, Japan
| | - Kohzo Ito
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa City, Chiba 277-8561, Japan
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7
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Uenuma S, Maeda R, Yokoyama H, Ito K. Precise control of cyclodextrin-based pseudo-polyrotaxane lamellar structure via axis polymer composition. SOFT MATTER 2020; 16:9035-9041. [PMID: 32869807 DOI: 10.1039/d0sm01388a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Self-assembly of cyclodextrin (CD) with guest polymers has attracted much attention owing to its biocompatibility and accessibility. In this study, we investigate the composition effect of poly(ethylene oxide)m-b-poly(propylene oxide)n-b-poly(ethylene oxide)m (EOmPOnEOm) triblock copolymers on lamellar or plate structures formed by complexation with β-CD. EO5PO29EO5, EO14PO29EO14, and EO75PO29EO75 show periodic lamellar morphology consisting of single-crystalline pseudo-polyrotaxane (PPR) nanosheets with a thickness equal to the central PO length. This is because β-CDs selectively cover the PO component and cause the microphase separation between β-CD and EO layers. The thickness of the EO layers increases linearly with increasing number of EO units, which suggests that the EO chains are constrained into virtual cylinders with the diameter of the β-CD. This means that we can precisely control the thickness of both the crystal (β-CD and PO) and the amorphous (EO) layers in the lamellar structure. In contrast, EO2PO29EO2 forms a thin plate structure, where not only PO but also EO chains are covered with β-CD. Furthermore, the length of the central PO component is necessary to form the lamellar structure with the phase separation between the β-CD and EO layers. These findings provide a more fundamental understanding to enhance the variety and applicability of CD-based self-assembled materials.
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Affiliation(s)
- Shuntaro Uenuma
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan.
| | - Rina Maeda
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan.
| | - Hideaki Yokoyama
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan.
| | - Kohzo Ito
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan.
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8
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Tonegawa A, Tamura A, Zhang S, Yui N. Hydrophobicity of acyl groups in α-cyclodextrin-threaded polyrotaxanes dominates the formation and stability of self-assembled nanoparticles. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122537] [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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9
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Puig-Rigall J, Serra-Gómez R, Guembe-Michel N, Grillo I, Dreiss CA, González-Gaitano G. Threading Different Rings on X-Shaped Block Copolymers: Hybrid Pseudopolyrotaxanes of Cyclodextrins and Tetronics. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joan Puig-Rigall
- Departamento de Química, Universidad de Navarra, 31080 Pamplona, Spain
| | | | | | - Isabelle Grillo
- Institut Laue-Langevin, 71 Avenue des Martyrs, B.P. 156, 38042 Grenoble Cedex, France
| | - Cécile A. Dreiss
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, SE1 9NH London, U.K
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Formation of well-defined supramolecular microstructures consisting of γ-cyclodextrin and polyether —rods, cubes, plates, and nanosheets—guided by guest polymer structure. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121689] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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11
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Uenuma S, Maeda R, Kato K, Mayumi K, Yokoyama H, Ito K. Drastic Change of Mechanical Properties of Polyrotaxane Bulk: ABA-BAB Sequence Change Depending on Ring Position. ACS Macro Lett 2019; 8:140-144. [PMID: 35619422 DOI: 10.1021/acsmacrolett.8b00896] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polyrotaxane (PR), consisting of many ring molecules and an axis polymer, is a typical supramolecular structure with unique topological characteristics. In this study, we demonstrated the drastic change of the macroscopic mechanical properties depending on the ring position of PR in bulk. Poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer was employed as an axis polymer to control the position of β-cyclodextrin (β-CD). To transfer the β-CD positions, hydroxypropyl groups (HPPR) and hydrophobic trimethyl silyl groups (TMS-HPPR), which have hydrophilic and hydrophobic β-CD, respectively, were synthesized. β-CDs in HPPR were localized on a central PPO segment and formed crystal domains. The axis polymer of HPPR could not bridge β-CD crystal domains, resulting in a melt state at high temperature. On the other hand, β-CDs in TMS-HPPR were transferred to both PEO segments and formed crystal domains. The axis polymer in TMS-HPPR could bridge the β-CD crystal domains, resulting in an elastic state even at high temperature. We succeeded in demonstrating the potential ability of PR: the macroscopic mechanical properties of PR can be changed from a melt state to an elastic one by manipulating the ring positions.
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Affiliation(s)
- Shuntaro Uenuma
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan
| | - Rina Maeda
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan
| | - Kazuaki Kato
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan
| | - Koichi Mayumi
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan
| | - Hideaki Yokoyama
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan
| | - Kohzo Ito
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-city, Chiba 277-8561, Japan
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12
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Puig-Rigall J, Serra-Gómez R, Stead I, Grillo I, Dreiss CA, González-Gaitano G. Pseudo-Polyrotaxanes of Cyclodextrins with Direct and Reverse X-Shaped Block Copolymers: A Kinetic and Structural Study. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02509] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Joan Puig-Rigall
- Departamento de Química, Universidad de Navarra, 31080 Pamplona, Spain
| | | | - Ian Stead
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, U.K
| | - Isabelle Grillo
- Institut
Laue-Langevin, 71 avenue des Martyrs, B.P. 156, Cedex 38042 Grenoble, France
| | - Cécile A. Dreiss
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, U.K
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13
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Uenuma S, Maeda R, Yokoyama H, Ito K. Autonomously isolated pseudo-polyrotaxane nanosheets fabricated via hierarchically ordered supramolecular self-assembly. Chem Commun (Camb) 2019; 55:4158-4161. [DOI: 10.1039/c9cc00511k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Autonomously isolated PPR nanosheets are fabricated via complexation between β-CD and a carboxyl-terminated poloxamer and the structural coloration was exhibited.
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Affiliation(s)
- Shuntaro Uenuma
- Department of Advanced Materials Science
- Graduate School of Frontier Sciences
- The University of Tokyo
- Chiba 277-8561
- Japan
| | - Rina Maeda
- Department of Advanced Materials Science
- Graduate School of Frontier Sciences
- The University of Tokyo
- Chiba 277-8561
- Japan
| | - Hideaki Yokoyama
- Department of Advanced Materials Science
- Graduate School of Frontier Sciences
- The University of Tokyo
- Chiba 277-8561
- Japan
| | - Kohzo Ito
- Department of Advanced Materials Science
- Graduate School of Frontier Sciences
- The University of Tokyo
- Chiba 277-8561
- Japan
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14
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Imholt L, Dong D, Bedrov D, Cekic-Laskovic I, Winter M, Brunklaus G. Supramolecular Self-Assembly of Methylated Rotaxanes for Solid Polymer Electrolyte Application. ACS Macro Lett 2018; 7:881-885. [PMID: 35650763 DOI: 10.1021/acsmacrolett.8b00406] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Li+-conducting solid polymer electrolytes (SPEs) obtained from supramolecular self-assembly of trimethylated cyclodextrin (TMCD), poly(ethylene oxide) (PEO), and lithium salt are investigated for application in lithium-metal batteries (LMBs) and lithium-ion batteries (LIBs). The considered electrolytes comprise nanochannels for fast lithium-ion transport formed by CD threaded on PEO chains. It is demonstrated that tailored modification of CD beneficially influences the structure and transport properties of solid polymer electrolytes, thereby enabling their application in LMBs. Molecular dynamics (MD) simulation and experimental data reveal that modification of CDs shifts the steady state between lithium ions inside and outside the channels, in this way improving the achievable ionic conductivity. Notably, the designed SPEs facilitated galvanostatic cycling in LMBs at fast charging and discharging rates for more than 200 cycles and high Coulombic efficiency.
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Affiliation(s)
- Laura Imholt
- Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Corrensstraße 46, 48149 Münster, Germany
| | - Dengpan Dong
- Department of Materials Science & Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Dmitry Bedrov
- Department of Materials Science & Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Isidora Cekic-Laskovic
- Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Corrensstraße 46, 48149 Münster, Germany
- MEET Battery Research Center/Institute of Physical Chemistry, University of Münster, Corrensstraße 46, 48149 Münster, Germany
| | - Martin Winter
- Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Corrensstraße 46, 48149 Münster, Germany
- MEET Battery Research Center/Institute of Physical Chemistry, University of Münster, Corrensstraße 46, 48149 Münster, Germany
| | - Gunther Brunklaus
- Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Corrensstraße 46, 48149 Münster, Germany
- MEET Battery Research Center/Institute of Physical Chemistry, University of Münster, Corrensstraße 46, 48149 Münster, Germany
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15
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Uenuma S, Maeda R, Takahashi S, Kato K, Yokoyama H, Ito K. Self-assembled Structure of Polyrotaxane Consisting of β-Cyclodextrin and Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Triblock Copolymer in Bulk System. CHEM LETT 2016. [DOI: 10.1246/cl.160490] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Qi R, Jin Y, Cheng X, Fan B, Sun T, Peng S, Li H. Crystallization-Driven Self-Assembly of Rod-Coil-Rod Pseudopolyrotaxanes into Spherical Micelles, Nanorods, and Nanorings in Aqueous Solutions. Macromol Rapid Commun 2015; 36:1402-8. [PMID: 25990437 DOI: 10.1002/marc.201500129] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 04/02/2015] [Indexed: 11/12/2022]
Abstract
A novel rod-containing block copolymer is constructed by supramacromolecular self-assembly of α-cyclodextrin and a triblock copolymer with methoxy polyethylene glycol as the flanking chains and the midterm block alternately connected by 2,2-dimethylolbutyric acid and isophorone diisocyanate. The assembled rod-containing block copolymer shows an exciting phenomenon of concentration- and pH-dependent morphological switching of well-defined nanostructures. In the solutions at pH 9.2, spherical micelles, rod-like micelles, and hydrogel are observed successively with an increase of the concentration. Notably, the rod-like micelles are composed of spherical segments due to the combination of the crystalline cores of the spherical micelles. In addition, 1D nanostructures with different curvatures from linear rod-like micelles (pH 9.2) to ring-shaped micelles (pH 7.5) can be obtained by controlling the pH values of the assembled systems.
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Affiliation(s)
- Rui Qi
- Center of Polymer Science and Technology, Chengdu Institute of Organic Chemistry, Chinese Academy of Science, Chengdu, 610041, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Yong Jin
- National Engineering Laboratory for Clean Technology of Leather, Manufacture, Sichuan University, Chengdu, 610065, China.,Key Laboratory of Leather Chemistry and Engineering (Sichuan University), Ministry of Education, Chengdu, 610065, China
| | - Xinfeng Cheng
- Center of Polymer Science and Technology, Chengdu Institute of Organic Chemistry, Chinese Academy of Science, Chengdu, 610041, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Baozhu Fan
- Center of Polymer Science and Technology, Chengdu Institute of Organic Chemistry, Chinese Academy of Science, Chengdu, 610041, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Tongbing Sun
- Center of Polymer Science and Technology, Chengdu Institute of Organic Chemistry, Chinese Academy of Science, Chengdu, 610041, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Shaojun Peng
- Center of Polymer Science and Technology, Chengdu Institute of Organic Chemistry, Chinese Academy of Science, Chengdu, 610041, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Hanping Li
- National Engineering Laboratory for Clean Technology of Leather, Manufacture, Sichuan University, Chengdu, 610065, China.,Key Laboratory of Leather Chemistry and Engineering (Sichuan University), Ministry of Education, Chengdu, 610065, China
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17
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Ji R, Cheng J, Song CC, Du FS, Liang DH, Li ZC. Acid-Sensitive Polypseudorotaxanes Based on Ortho Ester-Modified Cyclodextrin and Pluronic F-127. ACS Macro Lett 2015; 4:65-69. [PMID: 35596374 DOI: 10.1021/mz5007359] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We demonstrate a new type of acid-sensitive amphiphilic polypseudorotaxanes (PPRs) formed via inclusion complexation between Pluronic F127 and the hydrophobic β-cyclodextrin (CD) derivative in alcoholic solvents. The 6-OH ortho ester-substituted hydrophobic β-CD derivative (EMD-CD) was prepared by "click" reaction of β-CD with 2-ethylidene-4-methyl-1,3-dioxalane under mild conditions. The water-insoluble EMD-CD (host) is capable of forming PPRs with F127 (guest) in ethanol or methanol but not in water, which is confirmed by 1H NMR, wide-angle X-ray diffraction, small-angle X-ray scattering, and the time-dependent threading kinetics. Depending on the host/guest ratio, the PPRs self-assembled into sheet-like structure or vesicular nanoparticles with different sizes in water. These PPR assemblies were stable at pH 8.4 but quickly dissociated into biocompatible products in neutral or in acidic buffers due to the hydrolysis of the ortho ester groups. Good biocompatibility, ease of fabrication, and extremely pH-sensitive character make the PPRs promising carriers for anticancer drug delivery. Moreover, the present work provides an alternative method for the preparation of PPRs composed of water-insoluble CD derivatives.
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Affiliation(s)
- Ran Ji
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Jing Cheng
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Cheng-Cheng Song
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Fu-Sheng Du
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - De-Hai Liang
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Zi-Chen Li
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
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18
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Doganci E, Gorur M, Uyanik C, Yilmaz F. Supramolecular inclusion complexes of a star polymer containing cholesterol end-capped poly(ε-caprolactone) arms with β-cyclodextrin. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27408] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Erdinc Doganci
- Department of Chemistry; Gebze Institute of Technology; 41400 Gebze Kocaeli Turkey
- Department of Science Education; Kocaeli University; 41380 Kocaeli Turkey
| | - Mesut Gorur
- Department of Chemistry; Istanbul Medeniyet University; 34720 Istanbul Turkey
| | - Cavit Uyanik
- Department of Chemistry; Kocaeli University; 41380 Kocaeli Turkey
| | - Faruk Yilmaz
- Department of Chemistry; Gebze Institute of Technology; 41400 Gebze Kocaeli Turkey
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19
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Kuchlyan J, Banerjee C, Ghosh S, Kundu N, Banik D, Sarkar N. Effect of room temperature surface active ionic liquids on aggregated nanostructures of γ-Cyclodextrins: A picosecond fluorescence spectroscopic study. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Bleta R, Machut C, Léger B, Monflier E, Ponchel A. Investigating the effect of randomly methylated β-cyclodextrin/block copolymer molar ratio on the template-directed preparation of mesoporous alumina with tailored porosity. J INCL PHENOM MACRO 2014. [DOI: 10.1007/s10847-014-0405-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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BUI MPN, SEO SS. Fabrication of Polymerized Crystalline Colloidal Array Thin Film Modified β-Cyclodextrin Polymer for Paraoxon-ethyl and Parathion-ethyl Detection. ANAL SCI 2014; 30:581-7. [DOI: 10.2116/analsci.30.581] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Seong S. SEO
- Department of Natural Science, Albany State University
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22
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Larrañeta E, Isasi JR. Non-covalent hydrogels of cyclodextrins and poloxamines for the controlled release of proteins. Carbohydr Polym 2013; 102:674-81. [PMID: 24507335 DOI: 10.1016/j.carbpol.2013.11.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 10/09/2013] [Accepted: 11/01/2013] [Indexed: 11/25/2022]
Abstract
Different types of gels were prepared by combining poloxamines (Tetronic), i.e. poly(ethylene oxide)/poly(propylene oxide) (PEO/PPO) octablock star copolymers, and cyclodextrins (CD). Two different poloxamines with the same molecular weight (ca. 7000) but different molecular architectures were used. For each of their four diblock arms, direct Tetronic 904 presents PEO outer blocks while in reverse Tetronic 90R4 the hydrophilic PEO blocks are the inner ones. These gels were prepared by combining α-CD and poloxamine aqueous solutions. The physicochemical properties of these systems depend on several factors such as the structure of the block copolymers and the Tetronic/α-CD ratio. These gels were characterized using differential scanning calorimetry (DSC), viscometry and X-ray diffraction measurements. The 90R4 gels present a consistency that makes them suitable for sustained drug delivery. The resulting gels were easily eroded: these complexes were dismantled when placed in a large amount of water, so controlled release of entrapped large molecules such as proteins (Bovine Serum Albumin, BSA) is feasible and can be tuned by varying the copolymer/CD ratio.
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Affiliation(s)
- Eneko Larrañeta
- Departamento de Química y Edafología, Facultad de Ciencias, Universidad de Navarra, 31080 Pamplona, Navarra, Spain
| | - José Ramón Isasi
- Departamento de Química y Edafología, Facultad de Ciencias, Universidad de Navarra, 31080 Pamplona, Navarra, Spain.
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23
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Rydzek G, Garnier T, Schaaf P, Voegel JC, Senger B, Frisch B, Haikel Y, Petit C, Schlatter G, Jierry L, Boulmedais F. Self-construction of supramolecular polyrotaxane films by an electrotriggered morphogen-driven process. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10776-10784. [PMID: 23895332 DOI: 10.1021/la402454e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The design of films using a one-pot process has recently attracted increasing interest in the field of polymer thin film formation. Herein we describe the preparation of one-pot supramolecular polyrotaxane (PRX) films using the morphogen-driven self-construction process. This one-pot buildup strategy where the film growth is triggered by the electrochemical formation and diffusion of a catalyst in close vicinity of the substrate has recently been introduced by our group. A one-pot mixture was used that contained (i) poly(acrylic acid) (PAA) functionalized by azide groups grafted on the polymer chain through oligo(ethylene glycol) (EG) arms, leading to PAA-EG13-N3, (ii) cyclodextrins (α and β CD), as macrocycles that can be threaded along EG arms, (iii) alkyne-functionalized stoppers (ferrocene or adamantane), to cap the PRX assembly by click chemistry, and (iv) copper sulfate. The one-pot mixture solution was brought into contact with a gold electrode. Cu(I), the morphogen, was generated electrochemically from Cu(II) at the electrode/one-pot solution interface. This electrotriggered click reaction leads to the capping of polypseudorotaxane yielding to PRXs. The PRXs can self-assemble through lateral supramolecular interactions to form aggregates and ensure the cohesion of the film. The film buildup was investigated using different types of CD and alkyne functionalized stoppers. Supramolecular PRX aggregates were characterized by X-ray diffraction measurements. The film topographies were imaged by atomic force microscopy. The influence of the concentration in CD and the presence of a competitor were studied as well. The stability of the resulting film was tested in contact with 8 M urea and during the electrochemical oxidation of ferrocene.
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Affiliation(s)
- Gaulthier Rydzek
- INSERM, UMR-S 1121, Biomatériaux et Bioingénierie, 11 rue Humann, F-67085 Strasbourg Cedex, France
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24
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Bleta R, Machut C, Léger B, Monflier É, Ponchel A. Coassembly of Block Copolymer and Randomly Methylated β-Cyclodextrin: From Swollen Micelles to Mesoporous Alumina with Tunable Pore Size. Macromolecules 2013. [DOI: 10.1021/ma4008303] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rudina Bleta
- Université Lille Nord de France, F-59000 Lille, France
- UCCS, Faculté des Sciences
Jean Perrin, Université d'Artois, Rue Jean Souvraz, SP 18, F-62307 Lens, France
- CNRS, UMR 8181, F-59650
Villeneuve d’Ascq, France
| | - Cécile Machut
- Université Lille Nord de France, F-59000 Lille, France
- UCCS, Faculté des Sciences
Jean Perrin, Université d'Artois, Rue Jean Souvraz, SP 18, F-62307 Lens, France
- CNRS, UMR 8181, F-59650
Villeneuve d’Ascq, France
| | - Bastien Léger
- Université Lille Nord de France, F-59000 Lille, France
- UCCS, Faculté des Sciences
Jean Perrin, Université d'Artois, Rue Jean Souvraz, SP 18, F-62307 Lens, France
- CNRS, UMR 8181, F-59650
Villeneuve d’Ascq, France
| | - Éric Monflier
- Université Lille Nord de France, F-59000 Lille, France
- UCCS, Faculté des Sciences
Jean Perrin, Université d'Artois, Rue Jean Souvraz, SP 18, F-62307 Lens, France
- CNRS, UMR 8181, F-59650
Villeneuve d’Ascq, France
| | - Anne Ponchel
- Université Lille Nord de France, F-59000 Lille, France
- UCCS, Faculté des Sciences
Jean Perrin, Université d'Artois, Rue Jean Souvraz, SP 18, F-62307 Lens, France
- CNRS, UMR 8181, F-59650
Villeneuve d’Ascq, France
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25
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Liu X, Jiang W, Gou S, Ye Z, Feng M, Lai N, Liang L. Synthesis and evaluation of novel water-soluble copolymers based on acrylamide and modular β-cyclodextrin. Carbohydr Polym 2013; 96:47-56. [DOI: 10.1016/j.carbpol.2013.03.053] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 03/01/2013] [Accepted: 03/16/2013] [Indexed: 11/27/2022]
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26
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Lin N, Dufresne A. Supramolecular Hydrogels from In Situ Host–Guest Inclusion between Chemically Modified Cellulose Nanocrystals and Cyclodextrin. Biomacromolecules 2013; 14:871-80. [DOI: 10.1021/bm301955k] [Citation(s) in RCA: 167] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ning Lin
- Grenoble Institute of Technology (Grenoble INP), The International School of Paper, Print Media and Biomaterials (Pagora), CS10065, 38402
Saint Martin d’Hères Cedex, France
| | - Alain Dufresne
- Grenoble Institute of Technology (Grenoble INP), The International School of Paper, Print Media and Biomaterials (Pagora), CS10065, 38402
Saint Martin d’Hères Cedex, France
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27
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Jenita MJ, Venkatesh G, Subramanian V, Rajendiran N. Twisted intramolecular charge transfer effects on fast violet B and fast blue RR: Effect of HP-α- and HP-β-cyclodextrins. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.11.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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28
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Chang J, Li Y, Wang G, He B, Gu Z. Fabrication of novel coumarin derivative functionalized polypseudorotaxane micelles for drug delivery. NANOSCALE 2013; 5:813-820. [PMID: 23235914 DOI: 10.1039/c2nr32927a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The fabrication and drug delivery of novel polypseudorotaxane micelles with small molecule coumarin derivative as hydrophobic segment were reported. 7-Carboxymethoxy coumarin was immobilized on the terminal hydroxyl groups of poly(ethylene glycol) (PEG). The modified PEG chains were threaded in α-cyclodextrins (α-CDs) to form polypseudorotaxanes. The polypseudorotaxanes self-assembled into supramolecular micelles driven by hydrophobic interaction and polypseudorotaxane crystallization. Anti-tumor drug doxorubicin (DOX) was trapped in the micelles. The structure, morphology, drug release profile and cytotoxicity of the micelles were investigated. The in vitro anti-tumor studies including cellular uptake and inhibition efficiency were performed on mice cancer cell lines of TC1 lung cancer cells and B16 melanoma cells. The results revealed that the 7-carboxymethoxy coumarin modified PEG could thread into the cavity of α-CDs to form necklace-like polypseudorotaxanes. The polypseudorotaxanes self-assembled into spherical micelles with the mean size of 30 nanometers, and the size was increased to about 80 nanometers after the drug was loaded. The drug loading content of the micelles was decreased with increasing the chain length of PEG. The sustaining release of DOX could last for 32 hours. The polypseudorotaxane micelles were non-toxic to both TC1 and B16 cells. The IC50 of the DOX loaded polypseudorotaxane micelles with PEG2k was lower than that of micelles with PEG4k or PEG6k both in TC1 and B16 cells.
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Affiliation(s)
- Jing Chang
- National Engineering Research Center for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
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29
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Larrañeta E, Isasi JR. Self-assembled supramolecular gels of reverse poloxamers and cyclodextrins. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:12457-12462. [PMID: 22823574 DOI: 10.1021/la3024452] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A series of supramolecular aggregates were prepared using a poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) (PPO-PEO-PPO) block copolymer and β- or α-cyclodextrins (CD). The combination of β-CD and the copolymer yields inclusion complexes (IC) with polypseudorotaxane structures. These are formed by complexation of the PPO blocks with β-CD molecules producing a powder precipitate with a certain crystallinity degree that can be evaluated by X-ray diffraction (XRD). In contrast, when combining α-CD with the block copolymer, the observed effect is an increase in the viscosity of the mixtures yielding fluid gels. Two cooperative effects come into play: the complexation of PEO blocks with α-CD and the hydrophobic interactions between PPO blocks in aqueous media. These two combined interactions lead to the formation of a macromolecular network. The resulting fluid gels were characterized using different techniques such as differential scanning calorimetry (DSC), viscometry, and XRD measurements.
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Affiliation(s)
- Eneko Larrañeta
- Departamento de Química y Edafología, Facultad de Ciencias, Universidad de Navarra, 31080 Pamplona, Navarra, Spain
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30
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Chen Y, Ye Y, Wang L, Guo Y, Tan H. Synthesis of chitosan C6-substituted cyclodextrin derivatives with tosyl-chitin as the intermediate precursor. J Appl Polym Sci 2012. [DOI: 10.1002/app.36836] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Gingter S, Mondrzik B, Ritter H. Superstructures of Double Functionalized Host–Guest Acrylmonomers Containing Chiral Phenylalanine-click-cyclodextrin and Polymers. Macromolecules 2012. [DOI: 10.1021/ma3002164] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. Gingter
- Institute of Organic Chemistry and
Macromolecular Chemistry, Heinrich-Heine-University Duesseldorf, Universitaetsstraße
1, D-40225 Duesseldorf, Germany
| | - B. Mondrzik
- Institute of Organic Chemistry and
Macromolecular Chemistry, Heinrich-Heine-University Duesseldorf, Universitaetsstraße
1, D-40225 Duesseldorf, Germany
| | - H. Ritter
- Institute of Organic Chemistry and
Macromolecular Chemistry, Heinrich-Heine-University Duesseldorf, Universitaetsstraße
1, D-40225 Duesseldorf, Germany
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32
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He J. Effects of several inter-molecular interactions on the inclusion between methyl substituted β-cyclodextrin and some linear macromolecule in supercritical carbon dioxide medium. J INCL PHENOM MACRO 2011. [DOI: 10.1007/s10847-011-0047-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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33
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Tang Y, Heaysman CL, Willis S, Lewis AL. Physical hydrogels with self-assembled nanostructures as drug delivery systems. Expert Opin Drug Deliv 2011; 8:1141-59. [PMID: 21619469 DOI: 10.1517/17425247.2011.588205] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
INTRODUCTION As an essential complement to chemically crosslinked hydrogels, drug delivery systems based on physical hydrogels with self-assembled nanostructures are gaining increasing attention, owing to potential advantages of reduced toxicity, convenience of in situ gel formation, stimuli-responsiveness, reversible sol-gel transition, and improved drug loading and delivery profiles. AREAS COVERED In this review, drug delivery systems based on physical hydrogels are discussed according to their self-assembled nanostructures, such as micelles, layer-by-layer constructs, supramolecular inclusion complexes, polyelectrolyte complexes and crystalline structures. The driving forces of the self-assembly include hydrophobic interaction, hydrogen bonding, electrostatic interaction, π-π stacking and weak van der Waals forces. Stimuli-responsive properties of physical hydrogels, including thermo- and pH-sensitivity, are considered with particular focus on self-assembled nanostructures. EXPERT OPINION Fabricating self-assembled nanostructures in drug delivery hydrogels, via physical interactions between polymer-polymer and polymer-drug, requires accurately controlled macro- or small molecular architecture and a comprehensive knowledge of the physicochemical properties of the therapeutics. A variety of nanostructures within hydrogels, with which payloads may interact, provide useful means to stabilize the drug form and control its release kinetics.
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Affiliation(s)
- Yiqing Tang
- Biocompatibles UK Ltd, Chapman House, Farnham, Surrey, UK.
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