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Laquintana V, Lopedota AA, Ivone M, Denora N, Franco M, Palazzo G, Gentile L. Celecoxib-hydroxypropyl-β-cyclodextrin inclusion complex in a chitosan/PEO-PPO-PEO block copolymer matrix: Structural effect and drug release. J Colloid Interface Sci 2024; 660:1030-1038. [PMID: 38220494 DOI: 10.1016/j.jcis.2024.01.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 12/28/2023] [Accepted: 01/03/2024] [Indexed: 01/16/2024]
Abstract
HYPOTHESIS Triblock copolymers of poly(ethylene oxide) and poly(propylene oxide)-based matrices, such as Poloxamer 407 (P407) or Pluronic® F127, are extensively utilized in drug delivery and permeation systems due to their FDA approval and listing in the US and European Pharmacopoeias. The study hypothesizes that incorporating 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) and the celecoxib-HP-β-CD inclusion complex into a 16 wt% P407 and chitosan blend in an aqueous acetic acid solution will affect the system's rheological and structural properties. EXPERIMENTS Rheological, small-angle X-ray scattering (SAXS), and dynamic light scattering (DLS) experiments were conducted to assess the impact of acetic acid and chitosan on the 16 wt% P407 and chitosan blend. Additionally, in vitro drug release studies were performed to monitor the drug release profile over time. FINDINGS The addition of HP-β-CD was found to inhibit gel formation in the 16 wt% P407 and chitosan blend. However, the presence of the celecoxib-HP-β-CD inclusion complex showed no significant structural effects compared to P407 blended with chitosan alone. Rheological and SAXS analyses demonstrated that acetic acid led to the formation of a lamellar phase due to the lower pH, facilitating injectability. The presence of chitosan in acetic acid resulted in the detection of a hexagonal phase, affecting the release of celecoxib.
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Affiliation(s)
- Valentino Laquintana
- Department of Pharmacy, Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona 4, 70126 Bari, Italy
| | - Angela A Lopedota
- Department of Pharmacy, Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona 4, 70126 Bari, Italy
| | - Marianna Ivone
- Department of Pharmacy, Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona 4, 70126 Bari, Italy
| | - Nunzio Denora
- Department of Pharmacy, Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona 4, 70126 Bari, Italy
| | - Massimo Franco
- Department of Pharmacy, Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona 4, 70126 Bari, Italy
| | - Gerardo Palazzo
- Department of Chemistry, University of Bari Aldo Moro, Orabona 4, Bari 70126, Italy; Center of Colloid and Surface Science (CSGI) Bari Unit, via della Lastruccia 3, Sesto Fiorentino 50019, Italy
| | - Luigi Gentile
- Department of Chemistry, University of Bari Aldo Moro, Orabona 4, Bari 70126, Italy; Center of Colloid and Surface Science (CSGI) Bari Unit, via della Lastruccia 3, Sesto Fiorentino 50019, Italy.
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Kuzmanović Nedeljković S, Radan M, Ćujić Nikolić N, Mutavski Z, Krgović N, Marković S, Stević T, Živković J, Šavikin K. Microencapsulated Bilberry and Chokeberry Leaf Extracts with Potential Health Benefits. PLANTS (BASEL, SWITZERLAND) 2023; 12:3979. [PMID: 38068615 PMCID: PMC10707773 DOI: 10.3390/plants12233979] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 04/12/2024]
Abstract
The aim of the research was to develop microencapsulated powders of bilberry and chokeberry extracts via the spray drying technique. Two biopolymers, pectin alone and in combination with HP-β-CD, were used to preserve the antioxidant, hypoglycemic, photoprotective, and antimicrobial bioactivity of the berry leaf extracts. Moreover, the formed powders were characterized in terms of technological, chemical, and several biological properties. The obtained micro-sized powders (mean average particle diameter from 3.83 to 5.94 µm) demonstrated a process yield of up to 73%. The added biopolymers improved the flowability and cohesive properties of the powders and increased their thermal stability to 170 °C. The total content of polyphenolics in the powders ranged from 323.35 to 367.76 mg GAE/g DW for bilberry and from 186.85 to 227.59 mg GAE/g DW for chokeberry powders; meanwhile, chlorogenic acid was the predominant compound in powders. All samples showed stronger α-glucosidase inhibitory activity (IC50 values ranged from 5.00 to 19.59 µg/mL) compared with the reference standard. The study confirmed that spray drying is a suitable method for the preservation of the polyphenolic-rich extracts, while the addition of carriers has a positive effect on the improvement of microencapsulated powders' properties.
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Affiliation(s)
| | - Milica Radan
- Institute for Medicinal Plants Research Dr Josif Pančić, Tadeuša Košćuška 1, 11000 Belgrade, Serbia
| | - Nada Ćujić Nikolić
- Institute for Medicinal Plants Research Dr Josif Pančić, Tadeuša Košćuška 1, 11000 Belgrade, Serbia
| | - Zorana Mutavski
- Institute for Medicinal Plants Research Dr Josif Pančić, Tadeuša Košćuška 1, 11000 Belgrade, Serbia
| | - Nemanja Krgović
- Institute for Medicinal Plants Research Dr Josif Pančić, Tadeuša Košćuška 1, 11000 Belgrade, Serbia
| | - Smilja Marković
- Institute of Technical Sciences of SASA, Knez Mihailova 35/IV, 11000 Belgrade, Serbia;
| | - Tatjana Stević
- Institute for Medicinal Plants Research Dr Josif Pančić, Tadeuša Košćuška 1, 11000 Belgrade, Serbia
| | - Jelena Živković
- Institute for Medicinal Plants Research Dr Josif Pančić, Tadeuša Košćuška 1, 11000 Belgrade, Serbia
| | - Katarina Šavikin
- Institute for Medicinal Plants Research Dr Josif Pančić, Tadeuša Košćuška 1, 11000 Belgrade, Serbia
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3
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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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Calvino MM, Lazzara G, Cavallaro G, Milioto S. Inclusion complexes of triblock L35 copolymer and hydroxyl propyl cyclodextrins: a physico-chemical study. NEW J CHEM 2022. [DOI: 10.1039/d2nj00486k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Polypseudorotaxanes based on triblock L35 copolymer and hydroxyl propyl-modified cyclodextrins (HP-α-CD and HP-β-CD) have been characterized. Their physico-chemical properties have been correlated to the threading process.
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Affiliation(s)
- Martina Maria Calvino
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, pad. 17, Palermo 90128, Italy
| | - Giuseppe Lazzara
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, pad. 17, Palermo 90128, Italy
| | - Giuseppe Cavallaro
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, pad. 17, Palermo 90128, Italy
| | - Stefana Milioto
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, pad. 17, Palermo 90128, Italy
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Popović BM, Blagojević B, Latković D, Četojević-Simin D, Kucharska AZ, Parisi F, Lazzara G. A one step enhanced extraction and encapsulation system of cornelian cherry (Cornus mas L.) polyphenols and iridoids with β-cyclodextrin. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.110884] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Zhou Y, Yang R, Fan X, Sun M, He X. Self‐assembly of telechelic polymers bearing adamantane groups via host‐guest inclusion complexes with cyclodextrin polymer. J Appl Polym Sci 2021. [DOI: 10.1002/app.49520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yingxue Zhou
- Department of Polymeric Materials and Engineering, School of Materials Science and Engineering Xi'an Polytechnic University Xi'an China
| | - Rongrong Yang
- Department of Polymeric Materials and Engineering, School of Materials Science and Engineering Xi'an Polytechnic University Xi'an China
| | - Xiaodong Fan
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science Northwestern Polytechnical University Xi'an China
| | - Mengmeng Sun
- Department of Polymeric Materials and Engineering, School of Materials Science and Engineering Xi'an Polytechnic University Xi'an China
| | - Xinhai He
- Department of Polymeric Materials and Engineering, School of Materials Science and Engineering Xi'an Polytechnic University Xi'an China
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7
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Dos Santos Silva Araújo L, Lazzara G, Chiappisi L. Cyclodextrin/surfactant inclusion complexes: An integrated view of their thermodynamic and structural properties. Adv Colloid Interface Sci 2021; 289:102375. [PMID: 33592397 DOI: 10.1016/j.cis.2021.102375] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 12/14/2022]
Abstract
Cyclodextrins (CDs) play an important role in self-assembly systems of amphiphiles. The structure of CDs provides distinguished physicochemical properties, including the ability to form host-guest complexes. The complexation affects the properties of guest molecules and can produce supramolecular aggregates with desirable characteristics for fundamental and practical applications. Surfactants are particularly attractive host molecules due to their wide variety, availability, responsiveness to different stimuli, and high relevance in different fields, e.g. medical, cosmetic, pharmaceutical, and food industries. The tendency of organization in higher-order supramolecular aggregates arises the interest in applying such versatile complexes in the development of novel materials. In this review, we provide a comprehensive overview of the thermodynamics aspects of surfactants and CDs inclusion complexes formation in aqueous environment, emphasizing the assessment of the interactions, thermodynamic driving forces, and structural aspects. Also, the most common analytical techniques used to gather deep insight into the aspects of CDs complexes are discussed and the perspectives for the surfactant-cyclodextrin complexes are pointed out.
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Affiliation(s)
- Larissa Dos Santos Silva Araújo
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze pad 17, 90128 Palermo, Italy; Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042 Grenoble, France
| | - Giuseppe Lazzara
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze pad 17, 90128 Palermo, Italy.
| | - Leonardo Chiappisi
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042 Grenoble, France.
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8
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Wang J, Fang Q, Ye L, Zhang A, Feng ZG. The intrinsic microstructure of supramolecular hydrogels derived from α-cyclodextrin and pluronic F127: nanosheet building blocks and hierarchically self-assembled structures. SOFT MATTER 2020; 16:5906-5909. [PMID: 32555865 DOI: 10.1039/d0sm00979b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Supramolecular hydrogels derived from the self-assembly of α-cyclodextrin with pluronic F127 were found to be built up with polypseudorotaxane nanosheets with a thickness of 30-40 nm and possessed flower-like hierarchically assembled structures. The findings in this work could provide critical guidance for material design for biomedical purposes.
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Affiliation(s)
- Jin Wang
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Chinese Academy of Sciences, Suzhou 215123, P. R. China
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9
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Torchio A, Boffito M, Gallina A, Lavella M, Cassino C, Ciardelli G. Supramolecular hydrogels based on custom-made poly(ether urethane)s and cyclodextrins as potential drug delivery vehicles: design and characterization. J Mater Chem B 2020; 8:7696-7712. [DOI: 10.1039/d0tb01261k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A library of poly(ether urethane)-based supramolecular hydrogels was designed, showing quick gelation, no phase separation, remarkable mechanical and self-healing properties.
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Affiliation(s)
- Alessandro Torchio
- Department of Mechanical and Aerospace Engineering
- Politecnico di Torino
- Torino
- Italy
- Department of Surgical Sciences
| | - Monica Boffito
- Department of Mechanical and Aerospace Engineering
- Politecnico di Torino
- Torino
- Italy
| | - Andrea Gallina
- Department of Mechanical and Aerospace Engineering
- Politecnico di Torino
- Torino
- Italy
- Department of Science and Technological Innovation
| | - Mario Lavella
- Department of Mechanical and Aerospace Engineering
- Politecnico di Torino
- Torino
- Italy
- Department of Management
| | - Claudio Cassino
- Department of Science and Technological Innovation
- Università del Piemonte Orientale “A. Avogadro”
- Alessandria
- Italy
| | - Gianluca Ciardelli
- Department of Mechanical and Aerospace Engineering
- Politecnico di Torino
- Torino
- Italy
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10
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Kundu P, Das S, Chattopadhyay N. Managing efficacy and toxicity of drugs: Targeted delivery and excretion. Int J Pharm 2019; 565:378-390. [DOI: 10.1016/j.ijpharm.2019.04.058] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 04/17/2019] [Accepted: 04/19/2019] [Indexed: 01/03/2023]
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11
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Yao X, Huang P, Nie Z. Cyclodextrin-based polymer materials: From controlled synthesis to applications. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.03.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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12
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Kundu P, Chattopadhyay N. Exogenous delivery of a pyrazole based bioactive probe to natural DNA through non-ionic TX-165 micellar carrier. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2018.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Furuya T, Koga T. Theoretical study of inclusion complex formation of cyclodextrin and single polymer chain. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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14
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Zheng Y, Wyman IW. Supramolecular Nanostructures Based on Cyclodextrin and Poly(ethylene oxide): Syntheses, Structural Characterizations and Applications for Drug Delivery. Polymers (Basel) 2016; 8:E198. [PMID: 30979290 PMCID: PMC6431930 DOI: 10.3390/polym8050198] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/10/2016] [Accepted: 05/10/2016] [Indexed: 11/16/2022] Open
Abstract
Cyclodextrins (CDs) have been extensively studied as drug delivery carriers through host⁻guest interactions. CD-based poly(pseudo)rotaxanes, which are composed of one or more CD rings threading on the polymer chain with or without bulky groups (or stoppers), have attracted great interest in the development of supramolecular biomaterials. Poly(ethylene oxide) (PEO) is a water-soluble, biocompatible polymer. Depending on the molecular weight, PEO can be used as a plasticizer or as a toughening agent. Moreover, the hydrogels of PEO are also extensively studied because of their outstanding characteristics in biological drug delivery systems. These biomaterials based on CD and PEO for controlled drug delivery have received increasing attention in recent years. In this review, we summarize the recent progress in supramolecular architectures, focusing on poly(pseudo)rotaxanes, vesicles and supramolecular hydrogels based on CDs and PEO for drug delivery. Particular focus will be devoted to the structures and properties of supramolecular copolymers based on these materials as well as their use for the design and synthesis of supramolecular hydrogels. Moreover, the various applications of drug delivery techniques such as drug absorption, controlled release and drug targeting based CD/PEO supramolecular complexes, are also discussed.
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Affiliation(s)
- Yue Zheng
- Department of internal medicine, The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao 066004, China.
| | - Ian W Wyman
- Department of Chemistry, Queen's University, Kingston, ON K7L 3N6, Canada.
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15
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Massaro M, Cinà V, Labbozzetta M, Lazzara G, Lo Meo P, Poma P, Riela S, Noto R. Chemical and pharmaceutical evaluation of the relationship between triazole linkers and pore size on cyclodextrin–calixarene nanosponges used as carriers for natural drugs. RSC Adv 2016. [DOI: 10.1039/c6ra06143e] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Nanosponges based nanocarriers with three different cavities were used to encapsulate and release bioactive compounds.
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Affiliation(s)
- M. Massaro
- Dipartimento STEBICEF
- Sez. Chimica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
| | - V. Cinà
- Dipartimento STEBICEF
- Sez. Chimica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
| | - M. Labbozzetta
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile “G. D'Alessandro”
- Area Funzionale di Farmacologia
- Università di Palermo
- 90127 Palermo
- Italy
| | - G. Lazzara
- Dipartimento di Fisica e Chimica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
| | - P. Lo Meo
- Dipartimento STEBICEF
- Sez. Chimica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
| | - P. Poma
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile “G. D'Alessandro”
- Area Funzionale di Farmacologia
- Università di Palermo
- 90127 Palermo
- Italy
| | - S. Riela
- Dipartimento STEBICEF
- Sez. Chimica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
| | - R. Noto
- Dipartimento STEBICEF
- Sez. Chimica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
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16
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Kundu P, Ghosh S, Das S, Chattopadhyay N. Cyclodextrin induced controlled delivery of a biological photosensitizer from a nanocarrier to DNA. Phys Chem Chem Phys 2016; 18:3685-93. [DOI: 10.1039/c5cp06174a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Addition of β-cyclodextrin to the micelle bound phenosafranin in the presence of ctDNA leads to quantitative transfer of the fluorophore from the micelle to the DNA.
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Affiliation(s)
- Pronab Kundu
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Saptarshi Ghosh
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Sinjan Das
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
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17
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Shin JA, Lim YG. Facile Synthesis of Glycidyl Triazolyl Polymers in Water Using β-Cyclodextrin. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10434] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jung-Ah Shin
- The 4 R&D Institute-2; Agency for Defense Development; Daejeon 305-600 Republic of Korea
| | - Yeong-Gweon Lim
- The 4 R&D Institute-2; Agency for Defense Development; Daejeon 305-600 Republic of Korea
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18
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Abdul Karim A, Loh XJ. Design of a micellized α-cyclodextrin based supramolecular hydrogel system. SOFT MATTER 2015; 11:5425-5434. [PMID: 26053135 DOI: 10.1039/c5sm00665a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In recent years supramolecular structures built from macrocyclic compounds have attracted tremendous interest due to the unique properties derived from dynamic self-assembly. Our study proposes a two-step mechanism to form a supramolecular hydrogel system: (1) the formation of micelles, and (2) micelle association with α-cyclodextrin (α-CD) due to threading of PEGMA in the α-CD cavity, forming inclusion complexes. Using this mechanism, a supramolecular hydrogel made from a tri-component copolymer PLLA/DMAEMA/PEGMA and α-CD was fabricated for the first time and characterized in terms of its structural, morphological, and rheological properties.
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Affiliation(s)
- Anis Abdul Karim
- Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore.
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19
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González-Gaitano G, Müller C, Radulescu A, Dreiss CA. Modulating the self-assembly of amphiphilic X-shaped block copolymers with cyclodextrins: structure and mechanisms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4096-4105. [PMID: 25785814 DOI: 10.1021/acs.langmuir.5b00334] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Inclusion complexes between cyclodextrins and polymers-so-called pseudopolyrotaxanes (PPR)-are at the origin of fascinating supramolecular structures, which are finding increasing uses in biomedical and technological fields. Here we explore the impact of both native and a range of modified cyclodextrins (CD) on the self-assembly of X-shaped poly(ethylene oxide)-poly(propylene oxide) block copolymers, so-called Tetronics or poloxamines, by focusing on Tetronic 904 (T904, Mw 6700). The effects are markedly dependent on the type and arrangement of the substituents on the macrocycle. While native CDs drive the formation of a solid PPR, most substituted CDs induce micellar breakup, with dimethylated β-CD (DIMEB) having the strongest impact and randomly substituted CDs a much weaker disruptive effect. Using native α-CD as a "molecular trap", we perform competitive binding experiments-where two types of CDs thread together onto the polymer chains-to establish that DIMEB indeed has the highest propensity to form an inclusion complex with the polymer, while hydroxypropylated CDs do not thread. 1D (1)H NMR and ROESY experiments confirm the formation of a soluble PPR with DIMEB in which the CD binds preferentially to the PO units, thus providing the drive for the observed demicellization. A combination of dynamic light scattering (DLS) and small-angle neutron scattering (SANS) is used to extract detailed structural parameters on the micelles. A binding model is proposed, which exploits the chemical shifts of selected protons from the CD in conjunction with the Hill equation, to prove that the formation of the PPR is a negatively cooperative process, in which threaded DIMEBs hamper the entrance of subsequent macrocycles.
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Affiliation(s)
- Gustavo González-Gaitano
- †Departamento de Química y Edafología, Facultad de Ciencias, Universidad de Navarra, 31080 Pamplona, Spain
| | - Céline Müller
- ‡Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, U.K
| | - Aurel Radulescu
- §Jülich Center for Neutron Science, JCNS Outstation at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstraße 1,85747 Garching, Germany
| | - 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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20
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Jiang L, Ye L, Zhang AY, Feng ZG. Self-Assembly of Polyrotaxanes Synthesized Via Click Chemistry of Azido-Endcapped PNIPAAm-b
-Pluronic F68-b
-PNIPAAm/γ-CD with Propargylamine-Substituted β-CDs. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400047] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lan Jiang
- School of Materials Science and Engineering; Beijing Institute of Technology; Beijing 100081 China
| | - Lin Ye
- School of Materials Science and Engineering; Beijing Institute of Technology; Beijing 100081 China
| | - Ai-ying Zhang
- School of Materials Science and Engineering; Beijing Institute of Technology; Beijing 100081 China
| | - Zeng-guo Feng
- School of Materials Science and Engineering; Beijing Institute of Technology; Beijing 100081 China
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21
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Chen H, Ji H. Effect of substitution degree of 2-hydroxypropyl-β-cyclodextrin on the alkaline hydrolysis of cinnamaldehyde to benzaldehyde. Supramol Chem 2014. [DOI: 10.1080/10610278.2013.873126] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hongyan Chen
- Department of Chemical Engineering, Huizhou University, Huizhou 516007, China
| | - Hongbing Ji
- School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
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22
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Lee MY, Min SG, You SK, Choi MJ, Hong GP, Chun JY. Effect of β-cyclodextrin on physical properties of nanocapsules manufactured by emulsion–diffusion method. J FOOD ENG 2013. [DOI: 10.1016/j.jfoodeng.2013.06.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Singh PK, Nath S. Molecular Recognition Controlled Delivery of a Small Molecule from a Nanocarrier to Natural DNA. J Phys Chem B 2013; 117:10370-5. [DOI: 10.1021/jp402902k] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Prabhat K. Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Sukhendu Nath
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
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24
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Engineering poly(ethylene oxide) buccal films with cyclodextrin: A novel role for an old excipient? Int J Pharm 2013; 452:283-91. [DOI: 10.1016/j.ijpharm.2013.05.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 05/06/2013] [Accepted: 05/11/2013] [Indexed: 01/31/2023]
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25
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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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26
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Valero M, Grillo I, Dreiss CA. Rupture of Pluronic Micelles by Di-Methylated β-Cyclodextrin Is Not Due to Polypseudorotaxane Formation. J Phys Chem B 2012; 116:1273-81. [DOI: 10.1021/jp210439n] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Margarita Valero
- Departamento de Química Física, Facultad de Farmacia, Universidad de Salamanca, 37008 Salamanca, Spain
| | - Isabelle Grillo
- Institut Laue-Langevin (ILL), DS/LSS, 6, rue Jules Horowitz, B.P. 156, 38042 Grenoble Cedex, France
| | - Cécile A. Dreiss
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
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27
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Liu H, Li Y, Krause WE, Pasquinelli MA, Rojas OJ. Mesoscopic simulations of the phase behavior of aqueous EO19PO29EO19 solutions confined and sheared by hydrophobic and hydrophilic surfaces. ACS APPLIED MATERIALS & INTERFACES 2012; 4:87-95. [PMID: 22136187 DOI: 10.1021/am200917h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The MesoDyn method is used to investigate associative structures in aqueous solution of a nonionic triblock copolymer consisting of poly(propylene oxide) capped on both ends with poly(ethylene oxide) chains. The effect of adsorbing (hydrophobic) and nonadsorbing (hydrophilic) solid surfaces in contact with aqueous solutions of the polymer is elucidated. The macromolecules form self-assembled structures in solution. Confinement under shear forces is investigated in terms of interfacial behavior and association. The formation of micelles under confinement between hydrophilic surfaces occurs faster than in bulk aqueous solution while layered structures assemble when the polymers are confined between hydrophobic surfaces. Micelles are deformed under shear rates of 1 μs(-1) and eventually break to form persistent, adsorbed layered structures. As a result, surface damage under frictional forces is prevented. Overall, this study indicates that aqueous triblock copolymers of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) (Pluronics, EO(m)PO(n)EO(m)) act as a boundary lubricant for hydrophobic surfaces but not for hydrophilic ones.
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Affiliation(s)
- Hongyi Liu
- Fiber and Polymer Science Program and Department of Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, North Carolina 27695, USA
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28
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Riela S, Lazzara G, Lo Meo P, Guernelli S, D'Anna F, Milioto S, Noto R. Microwave-assisted synthesis of novel cyclodextrin–cucurbituril complexes. Supramol Chem 2011. [DOI: 10.1080/10610278.2011.636444] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Serena Riela
- a Dipartimento di Scienze e Tecnologie Molecolari e Biomolecolari (STEMBIO) , University of Palermo , V.le delle Scienze, Parco d'Orleans II, pad. 17, 90128 , Palermo , Italy
| | - Giuseppe Lazzara
- b Dipartimento di Chimica “S. Cannizzaro” , University of Palermo , V.le delle Scienze, Parco d'Orleans II, pad. 17, 90128 , Palermo , Italy
| | - Paolo Lo Meo
- a Dipartimento di Scienze e Tecnologie Molecolari e Biomolecolari (STEMBIO) , University of Palermo , V.le delle Scienze, Parco d'Orleans II, pad. 17, 90128 , Palermo , Italy
| | - Susanna Guernelli
- c Dipartimento di Chimica Organica “A. Mangini” , University of Bologna , Via S. Giacomo 11, 40126 , Bologna , Italy
| | - Francesca D'Anna
- a Dipartimento di Scienze e Tecnologie Molecolari e Biomolecolari (STEMBIO) , University of Palermo , V.le delle Scienze, Parco d'Orleans II, pad. 17, 90128 , Palermo , Italy
| | - Stefania Milioto
- b Dipartimento di Chimica “S. Cannizzaro” , University of Palermo , V.le delle Scienze, Parco d'Orleans II, pad. 17, 90128 , Palermo , Italy
| | - Renato Noto
- a Dipartimento di Scienze e Tecnologie Molecolari e Biomolecolari (STEMBIO) , University of Palermo , V.le delle Scienze, Parco d'Orleans II, pad. 17, 90128 , Palermo , Italy
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29
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Terekhova I, Koźbiał M, Kumeev R, Gierycz P. Complex formation of native and hydroxypropylated cyclodextrins with benzoic acid in aqueous solution: Volumetric and 1H NMR study. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.08.074] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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30
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Lee CH, Spano J, McGrath JE, Cook J, Freeman BD, Wi S. Solid-State NMR Molecular Dynamics Characterization of aHighly Chlorine-Resistant Disulfonated Poly(arylene ether sulfone) Random Copolymer Blended with Poly(ethylene glycol) Oligomers for Reverse Osmosis Applications. J Phys Chem B 2011; 115:6876-84. [DOI: 10.1021/jp2015148] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Joseph Cook
- Department of Chemical Engineering, Center for Energy and Environmental Resources, University of Texas Austin, Austin, Texas 78758, United States
| | - Benny D. Freeman
- Department of Chemical Engineering, Center for Energy and Environmental Resources, University of Texas Austin, Austin, Texas 78758, United States
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31
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Dou Z, Xing H, Xiao J. Hydrogenated and Fluorinated Host–Guest Surfactants: Complexes of Cyclodextrins with Alkanes and Fluoroalkyl‐Grafted Alkanes. Chemistry 2011; 17:5373-80. [DOI: 10.1002/chem.201003443] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Zeng‐Pei Dou
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P.R. China), Fax: (+86) 10‐62561871
| | - Hang Xing
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P.R. China), Fax: (+86) 10‐62561871
- Beijing FLUOBON Surfactant Institute, Beijing 100080 (P.R. China)
| | - Jin‐Xin Xiao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P.R. China), Fax: (+86) 10‐62561871
- Beijing FLUOBON Surfactant Institute, Beijing 100080 (P.R. China)
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32
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De Lisi R, Lazzara G, Milioto S. Temperature-controlled poly(propylene) glycol hydrophobicity on the formation of inclusion complexes with modified cyclodextrins. A DSC and ITC study. Phys Chem Chem Phys 2011; 13:12571-7. [DOI: 10.1039/c1cp20737g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Guerrero-Martínez A, Ávila D, J. Martínez-Casado F, Ripmeester JA, Enright GD, Cola LD, Tardajos G. Solid Crystal Network of Self-Assembled Cyclodextrin and Nonionic Surfactant Pseudorotaxanes. J Phys Chem B 2010; 114:11489-95. [DOI: 10.1021/jp105808j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrés Guerrero-Martínez
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - David Ávila
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Francisco J. Martínez-Casado
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - John A. Ripmeester
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Gary D. Enright
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Luisa De Cola
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Gloria Tardajos
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
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34
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Ghosh BC, Deb N, Mukherjee AK. Determination of Individual Proton Affinities of Ofloxacin from its UV−Vis Absorption, Fluorescence and Charge-Transfer Spectra: Effect of Inclusion in β-Cyclodextrin on the Proton Affinities. J Phys Chem B 2010; 114:9862-71. [DOI: 10.1021/jp103014b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Nipamanjari Deb
- Department of Chemistry, The University of Burdwan, Burdwan-713 104, India
| | - Asok K. Mukherjee
- Department of Chemistry, The University of Burdwan, Burdwan-713 104, India
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35
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36
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Yang C, Ni X, Li J. Synthesis of polypseudorotaxanes and polyrotaxanes with multiple α- and γ-cyclodextrins co-threaded over poly[(ethylene oxide)-ran-(propylene oxide)]. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.06.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Song LX, Bai L. Striking Structural Transformation from Cyclic Oligosaccharide to Aromatic Series by Means of the Effect of Lithium Carbonate Based on Gas Chromatography Coupled to Time-of-Flight Mass Spectrometry. J Phys Chem B 2009; 113:9035-40. [DOI: 10.1021/jp902805b] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Le Xin Song
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026 Anhui, China
| | - Lei Bai
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026 Anhui, China
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38
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Yang C, Li J. Thermoresponsive Behavior of Cationic Polyrotaxane Composed of Multiple Pentaethylenehexamine-grafted α-Cyclodextrins Threaded on Poly(propylene oxide)−Poly(ethylene oxide)−Poly(propylene oxide) Triblock Copolymer. J Phys Chem B 2008; 113:682-90. [DOI: 10.1021/jp809207q] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chuan Yang
- Division of Bioengineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574; and Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
| | - Jun Li
- Division of Bioengineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574; and Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
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