1
|
Hasan SN, Banerjee J, Patra S, Kar S, Das S, Samanta S, Wanigasekera D, Pavithra U, Wijesekera K, Napagoda M, Giri B, Dash SK, Bag BG. Self-assembled renewable nano-sized pentacyclic triterpenoid maslinic acids in aqueous medium for anti-leukemic, antibacterial and biocompatibility studies: An insight into targeted proteins-compound interactions based mechanistic pathway prediction through molecular docking. Int J Biol Macromol 2023; 245:125416. [PMID: 37336373 DOI: 10.1016/j.ijbiomac.2023.125416] [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: 01/26/2023] [Revised: 02/23/2023] [Accepted: 06/13/2023] [Indexed: 06/21/2023]
Abstract
Maslinic acid is a naturally occurring dihydroxy, mono-carboxy bioactive triterpenoid. Its bulky structure was the main hindrance in the path of biological activity. Sodium and potassium salts of nano-sized triterpenoid maslinic acid were prepared from maslinic acid and its self-assembly property was studied in aqueous and aqueous-organic binary liquid mixtures. Morphology of the compounds studied by Field Emission Scanning Electron Microscopy (FESEM), Atomic Force Microscopy (AFM), High Resolution Transmission Electron Microscopy (HRTEM), Optical Microscopy, Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) revealed vesicular morphology of the self-assemblies. Selective cytotoxicity was performed in leukemic (K-562 and KG-1a) and PBMC cells. Among the three self-assemblies (maslinic acid 1, sodium maslinate 2 and potassium maslinate 3), sodium maslinate 2 showed better antileukemic efficacy. Sodium maslinate 2 induced apoptosis in leukemic cells by elevating ROS levels and disrupting the cellular antioxidant system. From the in-silico studies, it was confirmed that 2 interacted with extrinsic and intrinsic apoptotic proteins of leukemic cells and killed those cells by inducing apoptotic pathways. The compounds 1, 2 and 3 showed significant antibacterial efficacy against E.coli strain through binding with several periplasmic membrane fusion protein (MFP) and limiting the efflux system leading to arrestation of antimicrobial resistance.
Collapse
Affiliation(s)
- Sk Nurul Hasan
- Department of Chemistry & Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Jhimli Banerjee
- Department of Physiology, University of Gour Banga, Malda 732103, West Bengal, India
| | - Soumen Patra
- Department of Chemistry & Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Sukhendu Kar
- Department of Chemistry & Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Sayan Das
- Department of Chemistry & Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Sovan Samanta
- Department of Physiology, University of Gour Banga, Malda 732103, West Bengal, India
| | - Dharani Wanigasekera
- Department of Biochemistry, Faculty of Medicine, University of Ruhuna, Galle 80000, Sri Lanka
| | - Upekshi Pavithra
- Department of Biochemistry, Faculty of Medicine, University of Ruhuna, Galle 80000, Sri Lanka
| | - Kanchana Wijesekera
- Department of Pharmacy, Faculty of Allied Health Sciences, University of Ruhuna, Galle 80 000, Sri Lanka
| | - Mayuri Napagoda
- Department of Biochemistry, Faculty of Medicine, University of Ruhuna, Galle 80000, Sri Lanka
| | - Biplab Giri
- Department of Physiology, University of Gour Banga, Malda 732103, West Bengal, India
| | - Sandeep Kumar Dash
- Department of Physiology, University of Gour Banga, Malda 732103, West Bengal, India.
| | - Braja Gopal Bag
- Department of Chemistry & Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India.
| |
Collapse
|
2
|
Shumilin I, Harries D. Enhanced solubilization in multi-component mixtures: mechanism of synergistic amplification of cyclodextrin solubility by urea and inorganic salts. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
|
3
|
Banjare MK, Behera K, Banjare RK, Pandey S, Ghosh KK. Multi-spectroscopic investigation on the inclusion complexation of α-cyclodextrin with long chain ionic liquid. Carbohydr Res 2020; 491:107982. [DOI: 10.1016/j.carres.2020.107982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 02/26/2020] [Accepted: 03/12/2020] [Indexed: 10/24/2022]
|
4
|
Banjare MK, Behera K, Banjare RK, Pandey S, Ghosh KK. Multi-spectroscopic investigation on the inclusion complexation of α-cyclodextrin with long chain ionic liquid. Carbohydr Res 2020; 491:107982. [DOI: https:/doi.org/10.1016/j.carres.2020.107982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2023]
|
5
|
Roux M, Bonnet V, Djedaïni-Pilard F. Ordering of Saturated and Unsaturated Lipid Membranes near Their Phase Transitions Induced by an Amphiphilic Cyclodextrin and Cholesterol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14376-14387. [PMID: 31564102 DOI: 10.1021/acs.langmuir.9b02082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
When inserted in membranes of dimyristoyl phosphatidylcholine (DMPC), methylated β-cyclodextrins with one (TrimβMLC) or two (TrimβDLC) lauryl acyl chains grafted onto the hydrophilic cavity exert a "cholesterol-like ordering effect", by straightening the acyl chains in the fluid phase at temperatures near the chain melting transition. This effect may be related to pretransitional events such as the "anomalous swelling" known to occur with saturated phosphatidylcholine membranes. To investigate this model, order profiles and bilayer thicknesses of DMPC and unsaturated 1-palmitoyl-2-oleoyl-phosphatidylcholine (POPC) membranes containing amphiphilic cyclodextrins or cholesterol were determined by deuterium NMR. The pure lipid membranes display both a qualitatively similar chain ordering upon cooling in the fluid phase, more important at the chain extremity, which gets more pronounced near their fluid-to-gel transitions. Both membranes show a bilayer thickness increase by ∼0.5 Å just above their transition, as observed previously with saturated phosphatidylcholines of various chain lengths. Membrane-insertion of 5% TrimβMLC or cholesterol induces an important ordering of the DMPC acyl chains just above the transition, which is also more pronounced at the chain extremity. There is an additional increase of the bilayer thickness, most probably due to a deep insertion of these amphiphilic molecules, facilitated by increased bilayer softness in the anomalous swelling regime. These effects are more important with TrimβMLC than with cholesterol. By contrast, no enhanced acyl chain ordering was observed when approaching the transition of TrimβMLC-containing POPC membranes, as a possible consequence of an eventual lack of anomalous swelling in unsaturated lipid membranes. Insertion of higher concentrations of TrimβMLC was found to induce a magnetic orientation of the DMPC membranes in the fluid phase with 10% of this derivative, coupled with the appearance of a broad isotropic component when the concentration is raised to 20%. No membrane orientation or isotropic component was detected with TrimβMLC-containing POPC membranes.
Collapse
Affiliation(s)
- Michel Roux
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS , Université Paris-Sud, Université Paris-Saclay , F-91198 Gif-sur-Yvette cedex , France
| | - Véronique Bonnet
- LG2A, UMR7378 , Université de Picardie Jules Verne , F-80039 Amiens , France
| | | |
Collapse
|
6
|
Zhang W, Jiang M, Gao T, Sun X, Zhou G. Controllable silica morphology transition from tremella-like spheres to brush-like fibers induced by β-cyclodextrin. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
7
|
Chu H, Zhao X, Liu S, Ni Z, Shi D, Chen M. Preparation and Stability Evaluation of Size-Controllable PDHCA- β
-CD Nanoparticles as Drug Carrier. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hong Chu
- School of Chemical and Material Engineering; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Xue Zhao
- School of Chemical and Material Engineering; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Shirong Liu
- School of Chemical and Material Engineering; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Zhongbin Ni
- School of Chemical and Material Engineering; Jiangnan University; Wuxi Jiangsu 214122 China
| | - Dongjian Shi
- School of Chemical and Material Engineering; Jiangnan University; Wuxi Jiangsu 214122 China
- The Key Laboratory of Food Colloids and Biotechnology; Ministry of Education, Jiangnan University; Wuxi Jiangsu 214122 China
| | - Mingqing Chen
- School of Chemical and Material Engineering; Jiangnan University; Wuxi Jiangsu 214122 China
- The Key Laboratory of Food Colloids and Biotechnology; Ministry of Education, Jiangnan University; Wuxi Jiangsu 214122 China
| |
Collapse
|
8
|
Do TT, Van Hooghten R, Van den Mooter G. A study of the aggregation of cyclodextrins: Determination of the critical aggregation concentration, size of aggregates and thermodynamics using isodesmic and K 2-K models. Int J Pharm 2017; 521:318-326. [PMID: 28216462 DOI: 10.1016/j.ijpharm.2017.02.037] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 10/20/2022]
Abstract
The aggregation of three different cyclodextrins (CDs): 2-hydroxypropyl-β-cyclodextrin (HP-β-CD), 2-hydroxypropyl-γ-cyclodextrin (HP-γ-CD) and sulfobutylether-β-cyclodextrin (SBE-β-CD) was studied. The critical aggregation concentration (cac) of these three CDs is quite similar and is situated at ca. 2% (m/v). There was only a small difference in the cac values determined by DLS and 1H NMR. DLS measurements revealed that CDs in solution have three size populations wherein one of them is that of a single CD molecule. The size of aggregates determined by TEM appears to be similar to the size of the aggregates in the second size distribution determined by DLS. Isodesmic and K2-K self-assembly models were used for studying the aggregation process of HP-β-CD, HP-γ-CD and SBE-β-CD. The results showed that the aggregation process of these CDs is a cooperative one, where the first step of aggregation is less favorable than the next steps. The determined thermodynamic parameters showed that the aggregation process of all three CDs is spontaneous and exothermic and it is driven by an increase of the entropy of the environment.
Collapse
Affiliation(s)
- Thao Thi Do
- Department of Pharmaceutical and Pharmacological Sciences, Drug Delivery and Disposition, KULeuven - University of Leuven, Leuven, Belgium
| | - Rob Van Hooghten
- Department of Chemical Engineering, KULeuven - University of Leuven, Leuven, Belgium
| | - Guy Van den Mooter
- Department of Pharmaceutical and Pharmacological Sciences, Drug Delivery and Disposition, KULeuven - University of Leuven, Leuven, Belgium.
| |
Collapse
|
9
|
Inhibition of cyclodextrins on α-galactosidase. Food Chem 2017; 217:59-64. [DOI: 10.1016/j.foodchem.2016.08.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 05/10/2016] [Accepted: 08/19/2016] [Indexed: 11/19/2022]
|
10
|
Li Z, Zheng Z, Su S, Yu L, Wang X. Hydroxypropyl-β-CD vs. its α-homologue for a 3D modified polyrotaxane network formation and properties: the relationship between modified CD and polymer revealed through comparison. SOFT MATTER 2016; 12:7089-7101. [PMID: 27501463 DOI: 10.1039/c6sm01368f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The threading mechanism of the hydroxypropyl-cyclodextrin (Hy-CD)/tetrahedron-like poly(ethylene glycol) (tetra-PEG) based host-guest complex and the relationship between Hy-CD and poly(ethylene oxide) (PEO) in the three-dimensional modified polyrotaxane (PR) formed by the complex were revealed through the comparison between Hy-β-CD/tetra-PEG and Hy-α-CD/tetra-PEG based systems from the macroscopic material view to the microscopic molecular view. The complexation between Hy-CD and tetra-PEG in water experiences a threading-dethreading-rethreading process which is controlled by the intermolecular interaction intensity or molecular hindrance depending on the feed ratio of Hy-CD to tetra-PEG. In the 3D modified PR, the methyl group of the Hy part on one Hy-CD can insert into the cavity of the adjacent Hy-CD and interacts with both the interior surface of the cavity and the PEO segment within the cavity if the cavity of Hy-CD is large enough. The threaded Hy-CD in the PR straightens the chain of PEO and suppresses the segment motion of the PEO. With the decrease of the cavity size of Hy-CD, the degree of suppression on the segment motion of PEO increases. Hy-CD threaded on the PEO chain can also deform when the 3D modified PR is compressed, and the degree of deformation increases with the increase of the cavity size of Hy-CD. These results of the modified CD/PEG based complex system set it apart from the unmodified CD/PEG based one, and reveal the structure-property relationship of this new type of Hy-CD/tetra-PEG based 3D modified PR material.
Collapse
Affiliation(s)
- Zhao Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China.
| | | | | | | | | |
Collapse
|
11
|
Formation of β-cyclodextrin complexes in an anhydrous environment. J Mol Model 2016; 22:207. [PMID: 27518085 PMCID: PMC4982878 DOI: 10.1007/s00894-016-3061-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 07/03/2016] [Indexed: 11/02/2022]
Abstract
The formation of inclusion complexes of β-cyclodextrin was studied at the melting temperature of guest compounds by differential scanning calorimetry. The complexes of long-chain n-alkanes, polyaromatics, and organic acids were investigated by calorimetry and IR spectroscopy. The complexation ratio of β-cyclodextrin was compared with results obtained in an aqueous environment. The stability and structure of inclusion complexes with various stoichiometries were estimated by quantum chemistry and molecular dynamics calculations. Comparison of experimental and theoretical results confirmed the possible formation of multiple inclusion complexes with guest molecules capable of forming hydrogen bonds. This finding gives new insight into the mechanism of formation of host-guest complexes and shows that hydrophobic interactions play a secondary role in this case. Graphical abstract The formation of complexes of β-cyclodextrin with selected n-alkanes, polyaromatics, and organic acids in an anhydrous environment is studied by differential scanning calorimetry, IR spectroscopy, and molecular modeling. The results obtained confirm the possible formation of multiple inclusion complexes with guest molecules capable of forming hydrogen bonds and give a new perspective on the mechanism of formation of host-guest complexes.
Collapse
|
12
|
Yan Y, Huang J, Tang BZ. Kinetic trapping - a strategy for directing the self-assembly of unique functional nanostructures. Chem Commun (Camb) 2016; 52:11870-84. [PMID: 27494003 DOI: 10.1039/c6cc03620a] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Supramolecular self-assembly into various nano- or microscopic structures based on non-covalent interactions between molecules has been recognized as a very efficient approach that leads to functional materials. Since most non-covalent interactions are relatively weak and form and break without significant activation barriers, the thermodynamic equilibrium of many supramolecular systems can be easily influenced by processing pathways that allow the system to stay in a kinetically trapped state. Thus far, kinetic traps have been found to be very important in producing more elaborate structural and functional diversity of self-assembled systems. In this review, we try to summarize the approaches that can produce kinetically trapped self-assemblies based on examples made by us. We focus on the following subjects: (1) supramolecular pathway dependent self-assembly, including kinetically trapped self-assemblies facilitated by host-guest chemistry, coordination chemistry, and electrostatic interactions; (2) physical processing pathway dependent self-assembly, including solvent quality controlled self-assembly, evaporation induced self-assembly and crystallization induced self-assembly.
Collapse
Affiliation(s)
- Yun Yan
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | | | | |
Collapse
|
13
|
The self-assemble of natural cyclodextrins in aqueous solutions: Application of miniature permeation studies for critical aggregation concentration (cac) determinations. Int J Pharm 2016; 505:187-93. [DOI: 10.1016/j.ijpharm.2016.03.049] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/23/2016] [Accepted: 03/24/2016] [Indexed: 11/18/2022]
|
14
|
Tan X, Song Y, Liu H, Zhong Q, Rockenbauer A, Villamena FA, Zweier JL, Liu Y. Supramolecular host-guest interaction of trityl-nitroxide biradicals with cyclodextrins: modulation of spin-spin interaction and redox sensitivity. Org Biomol Chem 2016; 14:1694-701. [PMID: 26700002 DOI: 10.1039/c5ob02450a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Supramolecular host-guest interactions of trityl-nitroxide (TN) biradicals CT02-VT, CT02-AT and CT02-GT with methyl-β-cyclodextrin (M-β-CD), hydroxypropyl-β-cyclodextrin (H-β-CD) and γ-cyclodextrin (γ-CD) were investigated by EPR spectroscopy. In the presence of cyclodextrins (i.e., γ-CD, M-β-CD and H-β-CD), host-guest complexes of CT02-VT are formed where the nitroxide and linker parts possibly interact with the cyclodextrins' cavities. Complexation with cyclodextrins leads to suppression of the intramolecular through-space spin-spin exchange coupling in CT02-VT, thus allowing the determination of the through-bond spin-spin exchange coupling which was calculated to be 1.6 G using EPR simulations. Different types of cyclodextrins have different binding affinities with CT02-VT in the order of γ-CD (95 M(-1)) > M-β-CD (70 M(-1)) > H-β-CD (32 M(-1)). In addition, the effect of the linkers in TN biradicals on the host-guest interactions was also investigated. Among the three TN biradicals studied, CT02-VT has the highest association constant with one designated cyclodextrin derivative. On the other hand, the complexes of CT02-GT (∼ 22 G) and CT02-AT (7.7-9.0 G) with cyclodextrins have much higher through-bond spin-spin exchange couplings than those of CT02-VT (1.6 G) due to the shorter linkers than those of CT02-VT. Furthermore, the stability of TN biradicals towards ascorbate was significantly enhanced after the complexation with CDs, with an almost 2-fold attenuation of the second-order rate constants for all the biradicals. Therefore, the supramolecular host-guest interactions with cyclodextrins will be an alternative method to modulate the magnitude of the spin-spin interactions and redox sensitivity of TN biradicals, and the resulting complexes are promising as highly efficient DNP polarizing agents as well as EPR redox probes.
Collapse
Affiliation(s)
- Xiaoli Tan
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Yuguang Song
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Huiqiang Liu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Qinwen Zhong
- The First Affiliated Hospital, Gannan Medical University, Jiangxi 341000, P. R. China.
| | - Antal Rockenbauer
- Institute of Materials and Environmental Chemistry, Hungarian Academy of Sciences and, Department of Physics, Budapest University of Technology and Economics, Budafoki ut 8, 1111 Budapest, Hungary
| | - Frederick A Villamena
- Center for Biomedical EPR Spectroscopy and Imaging, The Davis Heart and Lung Research Institute, THE Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University, Columbus, Ohio 43210, USA. and Department of Pharmacology, College of Medicine, The Ohio State University, Columbus, Ohio 43210, USA
| | - Jay L Zweier
- Center for Biomedical EPR Spectroscopy and Imaging, The Davis Heart and Lung Research Institute, THE Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University, Columbus, Ohio 43210, USA.
| | - Yangping Liu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China. and Center for Biomedical EPR Spectroscopy and Imaging, The Davis Heart and Lung Research Institute, THE Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University, Columbus, Ohio 43210, USA.
| |
Collapse
|
15
|
Radu CD, Parteni O, Ochiuz L. Applications of cyclodextrins in medical textiles - review. J Control Release 2016; 224:146-157. [PMID: 26796039 DOI: 10.1016/j.jconrel.2015.12.046] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 01/24/2023]
Abstract
This paper presents data on the general properties and complexing ability of cyclodextrins and assessment methods (phase solubility, DSC tests and X-ray diffraction, FTIR spectra, analytical method). It focuses on the formation of drug deposits on the surface of a textile underlayer, using a cyclodextrin compound favoring the inclusion of a drug/active principle and its release onto the dermis of patients suffering from skin disorders, or for protection against insects. Moreover, it presents the kinetics, duration, diffusion flow and release media of the cyclodextrin drug for in vitro studies, as well as the release modeling of the active principle. The information focuses on therapies: antibacterial, anti-allergic, antifungal, chronic venous insufficiency, psoriasis and protection against insects. The pharmacodynamic agents/active ingredients used on cotton, woolen and synthetic textile fabrics are presented.
Collapse
Affiliation(s)
- Cezar-Doru Radu
- "Gh. Asachi" Technical University Iasi, Department: Textiles, Leather and Industrial Management, 29 Mangeron Street, Iasi 20050, Romania.
| | - Oana Parteni
- "Gh. Asachi" Technical University Iasi, Department: Textiles, Leather and Industrial Management, 29 Mangeron Street, Iasi 20050, Romania.
| | - Lacramioara Ochiuz
- "Gr.T. Popa" University of Medicine and Pharmacy, Faculty of Pharmacy/Department of Pharmaceutical Technology, 11 Universitatii Street, Iasi, Romania.
| |
Collapse
|
16
|
Valente AJM, Carvalho RA, Söderman O. Do Cyclodextrins Aggregate in Water? Insights from NMR Experiments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6314-6320. [PMID: 26017565 DOI: 10.1021/acs.langmuir.5b01493] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
One decade ago Bonini et al. [Langmuir 2006, 22, 1478-1484] reported the occurrence of aggregates of β-cyclodextrin in aqueous solutions with sizes in the range from 90 nm to a few micrometers. The experimental technique used was cryo-TEM. This work followed a number of previous studies involving other physical parameters, such as viscosities and activity coefficients, the results of which were interpreted in terms of self-aggregation of cyclodextrins. Since then, the ability of cyclodextrins to self-assemble were often used to explain and rationalize the supramolecular mechanisms involving cyclodextrins. Here, the question of aggregation of native cyclodextrins (α-, β-, and γ-) in aqueous solutions is addressed by using (1)H NMR techniques, including NMR diffusometry, relaxometry, and proton peak intensities. Within the detection limit of the NMR experiments, no aggregates of cyclodextrin were observed. If aggregates are present, the fraction of cyclodextrin in aggregates is quite small-less than 1%. However, we cannot exclude the presence of transient clusters involving several cyclodextrin molecules where the lifetime of the cluster is short.
Collapse
Affiliation(s)
| | | | - Olle Söderman
- §Division of Physical Chemistry, Department of Chemistry, Lund University, PO Box 124, S-221 00 Lund, Sweden
| |
Collapse
|
17
|
Ghosh P, Das T, Maity A, Mondal S, Purkayastha P. Incorporation of Coumarin 6 in cyclodextrins: microcrystals to lamellar composites. RSC Adv 2015. [DOI: 10.1039/c4ra13706j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Coumarin 6 precipitates in water as microcrystals resulting in a considerable loss in fluorescence yield that can be considerably revived using cyclodextrin.
Collapse
Affiliation(s)
- Prasun Ghosh
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur Campus
- Mohanpur 741 246
- India
| | - Tarasankar Das
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur Campus
- Mohanpur 741 246
- India
| | - Arnab Maity
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur Campus
- Mohanpur 741 246
- India
| | - Somen Mondal
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur Campus
- Mohanpur 741 246
- India
| | - Pradipta Purkayastha
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur Campus
- Mohanpur 741 246
- India
| |
Collapse
|
18
|
Bardelang D, Casano G, Poulhès F, Karoui H, Filippini J, Rockenbauer A, Rosas R, Monnier V, Siri D, Gaudel-Siri A, Ouari O, Tordo P. Spin Exchange Monitoring of the Strong Positive Homotropic Allosteric Binding of a Tetraradical by a Synthetic Receptor in Water. J Am Chem Soc 2014; 136:17570-7. [DOI: 10.1021/ja509586k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- David Bardelang
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Gilles Casano
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Florent Poulhès
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Hakim Karoui
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Jessica Filippini
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Antal Rockenbauer
- Department of Physics, Budapest University of Technology and Economics and MTA-BME Condensed Matter Research Group, Budafoki ut 8, 1111 Budapest, Hungary
| | - Roselyne Rosas
- Aix-Marseille Université, CNRS, Spectropole, FR 1739, 13013 Marseille, France
| | - Valérie Monnier
- Aix-Marseille Université, CNRS, Spectropole, FR 1739, 13013 Marseille, France
| | - Didier Siri
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Anouk Gaudel-Siri
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Olivier Ouari
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| | - Paul Tordo
- Aix-Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, 13397 Marseille, France
| |
Collapse
|
19
|
Valente AJM, Söderman O. The formation of host-guest complexes between surfactants and cyclodextrins. Adv Colloid Interface Sci 2014; 205:156-76. [PMID: 24011696 DOI: 10.1016/j.cis.2013.08.001] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/01/2013] [Accepted: 08/01/2013] [Indexed: 11/15/2022]
Abstract
Cyclodextrins are able to act as host molecules in supramolecular chemistry with applications ranging from pharmaceutics to detergency. Among guest molecules surfactants play an important role with both fundamental and practical applications. The formation of cyclodextrin/surfactant host-guest compounds leads to an increase in the critical micelle concentration and in the solubility of surfactants. The possibility of changing the balance between several intermolecular forces, and thus allowing the study of, e.g., dehydration and steric hindrance effects upon association, makes surfactants ideal guest molecules for fundamental studies. Therefore, these systems allow for obtaining a deep insight into the host-guest association mechanism. In this paper, we review the influence on the thermodynamic properties of CD-surfactant association by highlighting the effect of different surfactant architectures (single tail, double-tailed, gemini and bolaform), with special emphasis on cationic surfactants. This is complemented with an assessment of the most common analytical techniques used to follow the association process. The applied methods for computation of the association stoichiometry and stability constants are also reviewed and discussed; this is an important point since there are significant discrepancies and scattered data for similar systems in the literature. In general, the surfactant-cyclodextrin association is treated without reference to the kinetics of the process. However, there are several examples where the kinetics of the process can be investigated, in particular those where volumes of the CD cavity and surfactant (either the tail or in special cases the head group) are similar in magnitude. This will also be critically reviewed.
Collapse
Affiliation(s)
- Artur J M Valente
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
| | - Olle Söderman
- Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
| |
Collapse
|
20
|
Bleta R, Menuel S, Léger B, Da Costa A, Monflier E, Ponchel A. Evidence for the existence of crosslinked crystalline domains within cyclodextrin-based supramolecular hydrogels through sol–gel replication. RSC Adv 2014. [DOI: 10.1039/c3ra47765g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
21
|
|
22
|
Pradal C, Jack KS, Grøndahl L, Cooper-White. JJ. Gelation Kinetics and Viscoelastic Properties of Pluronic and α-Cyclodextrin-Based Pseudopolyrotaxane Hydrogels. Biomacromolecules 2013; 14:3780-92. [DOI: 10.1021/bm401168h] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
23
|
Rogalski M, Modaressi A, Magri P, Mutelet F, Grydziuszko A, Wlazło M, Domańska U. Physico-chemical properties and phase behavior of the ionic liquid-β-cyclodextrin complexes. Int J Mol Sci 2013; 14:16638-55. [PMID: 23945559 PMCID: PMC3759929 DOI: 10.3390/ijms140816638] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 07/30/2013] [Accepted: 07/31/2013] [Indexed: 12/02/2022] Open
Abstract
The solubility of β-cyclodextrin (β-CD) in ionic liquids (ILs) and the activity coefficients at infinite dilution (γ13(∞)) of more than 20 solutes (alkanes, aromatic hydrocarbons, alcohols) were measured in four chosen ionic liquids, their mixtures with β-CD, and in the β-CD at high temperatures from 338 to 398 K using the inverse gas chromatography. The intermolecular interactions, inclusion complexes and the possible increasing of the solubility of β-CD in water using the IL are presented. The solubility of β-CD in ten chosen hydrophobic ILs at the temperature T = 423 K was detected. The solid-liquid phase diagrams (SLE) of {IL (1) + β-CD (2)} binary systems at the high mole fraction of the IL were measured for three systems (1-ethyl-3-methylimidazolium chloride, [EMIM][Cl], 1-ethyl-3-methylimidazolium bromide, [EMIM][Br]; and for 1-butyl-3-methylimidazolium chloride, [BMIM][Cl]). The eutectic points were determined at the high IL concentration for all binary systems. The intermolecular interaction and the possibility of inclusion complexes of the IL and/or solvents with β-CD were discussed. The infrared spectroscopy, IR was used for the description of the intermolecular interactions in the (β-CD + IL) systems. It was shown via the activity coefficients at infinite dilution results that the inclusion complexes are dependent on the temperature. The addition of β-CD to the IL does not improve the selectivity of the separation of the aliphatics from aromatics.
Collapse
Affiliation(s)
- Marek Rogalski
- LCP-A2MC, EA 4164, Université de Lorraine, 1, bd Arago-57078 METZ, Cedex 3, France; E-Mails: (M.R.); (A.M.); (P.M.)
| | - Ali Modaressi
- LCP-A2MC, EA 4164, Université de Lorraine, 1, bd Arago-57078 METZ, Cedex 3, France; E-Mails: (M.R.); (A.M.); (P.M.)
| | - Pierre Magri
- LCP-A2MC, EA 4164, Université de Lorraine, 1, bd Arago-57078 METZ, Cedex 3, France; E-Mails: (M.R.); (A.M.); (P.M.)
| | - Fabrice Mutelet
- Institut National Polytechnique De Lorraine, Nancy Université, 2 av.de la Forêt de Haye BP3, Vandceuvre-lès-Nancy Cedex 54501, France; E-Mail:
| | - Aleksandra Grydziuszko
- Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland; E-Mails: (A.G.); (M.W.)
| | - Michał Wlazło
- Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland; E-Mails: (A.G.); (M.W.)
| | - Urszula Domańska
- Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland; E-Mails: (A.G.); (M.W.)
| |
Collapse
|
24
|
Lopez-Lopez M, Montilla F, Olivares M, Lebron JA, Moya ML, Lopez-Cornejo P. Interaction between monomers of two surfactants derived from the [Ru(2,2'-bpy)(3)](2+) complex and α, β and γ-cyclodextrins: formation of [2]- and [3]-pseudorotaxanes. Dalton Trans 2013; 42:6171-81. [PMID: 23525374 DOI: 10.1039/c3dt32197e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new surfactants derived from the tris(2,2'-bipyridine) ruthenium(II) complex, [Ru(2,2'-bpy)(3)](2+), were synthesized and characterized: the double-tailed [Ru(2,2'-bipy)2(4,4'-(C(11)H(23))(2)-2,2'-bipy)](2+) surfactant (RuC11) and the mono-tailed [Ru(2,2'-bipy)(2)(4-(CH(3))-4'-(C(13)H(27))-2,2'-bipy)](2+) surfactant (RuC13). The main characteristic of these species is the presence of an inorganic complex as the polar head of the surfactant with interesting luminescence properties, which were used to study the interaction of these cationic surfactants with α-, β- and γ-cyclodextrins (CD). The results showed the formation of [2]- and [3]-pseudorotaxanes. The binding constant values as well as the stoichiometry of the complexes formed were obtained; the results were confirmed, from a qualitative point of view, with NMR spectra.
Collapse
Affiliation(s)
- M Lopez-Lopez
- Departamento de Ingeniería Química, Química Física y Química, Orgánica, Universidad de Huelva, Campus El Carmen, Facultad de Ciencias Experimentales, E-21071, Spain
| | | | | | | | | | | |
Collapse
|
25
|
Roux M, Sternin E, Bonnet V, Fajolles C, Djedaíni-Pilard F. Dynamic lipid lateral segregation driven by lauryl cyclodextrin interactions at the membrane surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3677-3687. [PMID: 23409976 DOI: 10.1021/la304524a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Amphiphilic cyclodextrins, with a cholesterol anchor (βChol) or an aspartic acid moiety esterified by two lauryl acyl chains (βDLC), were designed to combine the inclusion ability of the cyclodextrin cavity with the carrier properties of model membranes. Their insertion in phosphatidylcholine bilayers induces a marked lateral phase separation into a pure lipid phase and a cyclodextrin-rich phase (LCD), organized as a 2D cyclodextrin network stabilized by intermolecular hydrogen bonds between the saccharide headgroups at the membrane surface (Roux, M.; Perly, B.; Djedaïni-Pilard, F. Self-Assemblies of Amphiphilic Cyclodextrins. Eur. Biophys. J.2007, 36, 861-867). We have replaced the dilauryl anchor by a single lauryl chain grafted onto a leucine residue, giving monolauryl-β-cyclodextrin (βMLC), which readily inserts into bilayers of chain-deuterated DMPC-d27. The removal of one lauryl acyl chain leads to a dynamic membrane insertion of this new cyclodextrin derivative, with significant lipid exchange on the deuterium NMR time scale between a loosely packed cyclodextrin-enriched phase (L'CD) and free lipid regions, yielding broadened two-component NMR spectra. Like the LCD phases, the cyclodextrin-enriched L'CD regions remain (partially) fluid below the DMPC-d27 main fluid-to-gel transition but do not undergo a clear transition toward a gel state, as observed at 14.5 °C in the LCD phase induced by the dilauryl derivative. Partially fluid lipids of the βMLC-induced L'CD phase coexist with pure lipids in the Pβ' gel phase with possible exchange between them until all of the lipids undergo a transition toward an Lβ' gel state at around 7 °C. Trimethylated monolauryl-β-cyclodextrins induce only an ordering of the lipid acyl chains just above the main transition, without any lateral phase separation. Similar chain ordering is also observed within the βMLC-induced L'CD phase as a consequence of the deep membrane insertion of the monolauryl nonmethylated cyclodextrin derivative.
Collapse
Affiliation(s)
- Michel Roux
- CEA/DSV/iBiTec-S, UMR CNRS 8221, SB2SM, F-91191 Gif sur Yvette Cedex, France
| | | | | | | | | |
Collapse
|
26
|
Kurkov SV, Loftsson T. Cyclodextrins. Int J Pharm 2012; 453:167-80. [PMID: 22771733 DOI: 10.1016/j.ijpharm.2012.06.055] [Citation(s) in RCA: 544] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 06/25/2012] [Accepted: 06/26/2012] [Indexed: 01/24/2023]
Abstract
Although cyclodextrins (CDs) have been studied for over 100 years and can be found in at least 35 pharmaceutical products, they are still regarded as novel pharmaceutical excipients. CDs are oligosaccharides that possess biological properties that are similar to their linear counterparts, but some of their physicochemical properties differ. CDs are able to form water-soluble inclusion complexes with many poorly soluble lipophilic drugs. Thus, CDs are used to enhance the aqueous solubility of drugs and to improve drug bioavailability after, for example, oral administration. Through CD complexation, poorly soluble drugs can be formulated as aqueous parenteral solutions, nasal sprays and eye drop solutions. These oligosaccharides are being recognized as non-toxic and pharmacologically inactive excipients for both drug and food products. Recently, it has been observed that CDs and CD complexes in particular self-assemble to form nanoparticles and that, under certain conditions, these nanoparticles can self-assemble to form microparticles. These properties have changed the way we perform CD research and have given rise to new CD formulation opportunities. Here, the pharmaceutical applications of CDs are reviewed with an emphasis on their solubilizing properties, their tendency to self-assemble to form aggregates, CD ternary complexes, and their metabolism and pharmacokinetics.
Collapse
Affiliation(s)
- Sergey V Kurkov
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavik, Iceland
| | | |
Collapse
|
27
|
|
28
|
Interactions between cyclodextrins and fluorescent T-2 and HT-2 toxin derivatives: a physico-chemical study. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0130-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
29
|
Turina AV, Schreier S, Perillo MA. Coupling between GABA(A)-R ligand-binding activity and membrane organization in β-cyclodextrin-treated synaptosomal membranes from bovine brain cortex: new insights from EPR experiments. Cell Biochem Biophys 2012; 63:17-33. [PMID: 22311134 DOI: 10.1007/s12013-012-9338-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Correlations between GABA(A) receptor (GABA(A)-R) activity and molecular organization of synaptosomal membranes (SM) were studied along the protocol for cholesterol (Cho) extraction with β-cyclodextrin (β-CD). The mere pre-incubation (PI) at 37°C accompanying the β-CD treatment was an underlying source of perturbations increasing [(3)H]-FNZ maximal binding (70%) and K (d) (38%), plus a stiffening of SMs' hydrocarbon core region. The latter was inferred from an increased compressibility modulus (K) of SM-derived Langmuir films, a blue-shifted DPH fluorescence emission spectrum and the hysteresis in DPH fluorescence anisotropy (A (DPH)) in SMs submitted to a heating-cooling cycle (4-37-4°C) with A (DPH,heating) < A (DPH,cooling). Compared with PI samples, the β-CD treatment reduced B (max) by 5% which correlated with a 45%-decrement in the relative Cho content of SM, a decrease in K and in the order parameter in the EPR spectrum of a lipid spin probe labeled at C5 (5-SASL), and significantly increased A (TMA-DPH). PI, but not β-CD treatment, could affect the binding affinity. EPR spectra of 5-SASL complexes with β-CD-, SM-partitioned, and free in solution showed that, contrary to what is usually assumed, β-CD is not completely eliminated from the system through centrifugation washings. It was concluded that β-CD treatment involves effects of at least three different types of events affecting membrane organization: (a) effect of PI on membrane annealing, (b) effect of residual β-CD on SM organization, and (c) Cho depletion. Consequently, molecular stiffness increases within the membrane core and decreases near the polar head groups, leading to a net increase in GABA(A)-R density, relative to untreated samples.
Collapse
Affiliation(s)
- Anahí V Turina
- IIBYT, CONICET - Biofísica-Química, Departamento de Química, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina.
| | | | | |
Collapse
|
30
|
De Sousa FB, Lima AC, Denadai AML, Anconi CPA, De Almeida WB, Novato WTG, Dos Santos HF, Drum CL, Langer R, Sinisterra RD. Superstructure based on β-CD self-assembly induced by a small guest molecule. Phys Chem Chem Phys 2012; 14:1934-44. [PMID: 22234498 DOI: 10.1039/c2cp22768a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The size, shape and surface chemistry of nanoparticles play an important role in cellular interaction. Thus, the main objective of the present study was the determination of the β-cyclodextrin (β-CD) self-assembly thermodynamic parameters and its structure, aiming to use these assemblies as a possible controlled drug release system. Light scattering measurements led us to obtain the β-CD's critical aggregation concentration (cac) values, and consequently the thermodynamic parameters of the β-CD spontaneous self-assembly in aqueous solution: Δ(agg)G(o) = -16.31 kJ mol(-1), Δ(agg)H(o) = -26.48 kJ mol(-1) and TΔ(agg)S(o) = -10.53 kJ mol(-1) at 298.15 K. Size distribution of the self-assembled nanoparticles below and above cac was 1.5 nm and 60-120 nm, respectively. The number of β-CD molecules per cluster and the second virial coefficient were identified through Debye's plot and molecular dynamic simulations proposed the three-fold assembly for this system below cac. Ampicillin (AMP) was used as a drug model in order to investigate the key role of the guest molecule in the self-assembly process and the β-CD:AMP supramolecular system was studied in solution, aiming to determine the structure of the supramolecular aggregate. Results obtained in solution indicated that the β-CD's cac was not affected by adding AMP. Moreover, different complex stoichiometries were identified by nuclear magnetic resonance and isothermal titration calorimetry experiments.
Collapse
Affiliation(s)
- Frederico B De Sousa
- Laboratório de Encapsulamento Molecular e Biomateriais (LEMB), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, 31270-901, MG, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Jiang L, Yan Y, Huang J. Versatility of cyclodextrins in self-assembly systems of amphiphiles. Adv Colloid Interface Sci 2011; 169:13-25. [PMID: 21839422 DOI: 10.1016/j.cis.2011.07.002] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 07/14/2011] [Accepted: 07/16/2011] [Indexed: 11/25/2022]
Abstract
Recently, cyclodextrins (CDs) were found to play important yet complicated (or even apparently opposite sometimes) roles in self-assembly systems of amphiphiles or surfactants. Herein, we try to review and clarify the versatility of CDs in surfactant assembly systems by 1) classifying the roles played by CDs into two groups (modulator and building unit) and four subgroups (destructive and constructive modulators, amphiphilic and unamphiphilic building units), 2) comparing these subgroups, and 3) analyzing mechanisms. As a modulator, although CDs by themselves do not participate into the final surfactant aggregates, they can greatly affect the aggregates in two ways. In most cases CDs will destroy the aggregates by depleting surfactant molecules from the aggregates (destructive), or in certain cases CDs can promote the aggregates to grow by selectively removing the less-aggregatable surfactant molecules from the aggregates (constructive). As an amphiphilic building unit, CDs can be chemically (by chemical bonds) or physically (by host-guest interaction) attached to a hydrophobic moiety, and the resultant compounds act as classic amphiphiles. As an unamphiphilic building unit, CD/surfactant complexes or even CDs on their own can assemble into aggregates in an unconventional, unamphiphilic manner driven by CD-CD H-bonds. Moreover, special emphasis is put on two recently appeared aspects: the constructive modulator and unamphiphilic building unit.
Collapse
|
32
|
Messner M, Kurkov SV, Flavià-Piera R, Brewster ME, Loftsson T. Self-assembly of cyclodextrins: the effect of the guest molecule. Int J Pharm 2011; 408:235-47. [PMID: 21316429 DOI: 10.1016/j.ijpharm.2011.02.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Revised: 02/02/2011] [Accepted: 02/04/2011] [Indexed: 10/18/2022]
Abstract
The principle action by which cyclodextrins solubilize compounds is via inclusion complex formation. However, data suggest that cyclodextrins and their complexes also aggregate in solution and this aggregation contributes to their ability to solubilize poorly water-soluble materials. The current effort aims at better understanding the role of guest molecule nature (i.e. its structural and functional peculiarities) in cyclodextrin complex aggregation as well as in the aggregate stability assessed using a cellophane membrane permeability assay. A test set of 11 acidic, basic and neutral drugs and antibacterial agents (i.e. guests) were examined with regard to their interaction with hydroxypropyl-β-cyclodextrin (HPβCD) and the resulting ability of the formed aggregates to move through a semi-permeable membrane of various molecular weight cut-off values. The data suggested that the interaction of HPβCD with certain guests resulted in the formation of structure large enough to poorly penetrate semi-permeable membrane. The aggregates appeared to be highly dynamic in that there were no qualitative differences between systems that were diluted immediately prior to permeation experiments and those allowed to equilibrate. Pharmaceutical polymers which have been shown to enhance solubilizing efficiency of cyclodextrins had little or no effect on the stability of the aggregates using the permeability paradigm as an endpoint with the exception of carboxymethylcellulose.
Collapse
Affiliation(s)
- Martin Messner
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavik, Iceland
| | | | | | | | | |
Collapse
|
33
|
Rao JP, Geckeler KE. Cyclodextrin Supramacromolecules: Unexpected Formation in Aqueous Phase under Ambient Conditions. Macromol Rapid Commun 2011; 32:426-30. [DOI: 10.1002/marc.201000630] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Revised: 11/11/2010] [Indexed: 11/09/2022]
|
34
|
Khouri S, Tam KC. Complexation between α-cyclodextrin and PEGylated-PAMAM dendrimers at low and high pH values. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:17969-17974. [PMID: 21038877 DOI: 10.1021/la103287r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Poly(ethylene glycol)-grafted-poly(amido amine) (PEGylated-PAMAM) dendrimers have attracted increasing amounts of attention because of their improved stability, toxicity, and better particle drug leakage property. The complexation of α-cyclodextrin (α-CD) with grafted PEG segments on the surface of PAMAM dendrimers was elucidated by light scattering and titration calorimetry. At pH 10, complexation between α-CD and PEGylated-PAMAM occurred once α-CD was titrated into the PAMAM solution. We observed for the first time a unique phenomenon at pH 2, where no binding took place until a critical α-CD concentration (C*) of ∼8.0 mM was reached. The size of the nanostructures increased from 6.7 to 57.6 nm when the α-CD concentration was increased from 0.5 to 15 mM at pH 2. The zeta potential of PEGylated-PAMAM at pH 2 was +6.7 mV. Thus, the dendrimers possessed positive charges attributed to the protonation of primary amine groups on PAMAM chains that impart electrostatic repulsive forces to the system. The morphology of the complex is expected to be different at two different pH values (2 and 10) because the former produces a clear solution and the latter forms a turbid solution with white precipitates.
Collapse
Affiliation(s)
- Salim Khouri
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1
| | | |
Collapse
|
35
|
|
36
|
Rak J, Ondo D, Tkadlecova M, Dohnal V. On the Interaction of Ionic Liquid 1-Butyl-3-Methylimidazolium Hexafluorophosphate with β-Cyclodextrin in Aqueous Solutions. ACTA ACUST UNITED AC 2010. [DOI: 10.1524/zpch.2010.5526] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The formation of inclusion complex of β-cyclodextrin (β-CD) with the hydrophobic room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF6) in aqueous solutions was studied at 298.15 K using 1H, 13C, 19F and 31P NMR spectroscopy and isothermal titration calorimetry (ITC). Currently, there is a disagreement in the literature concerning the structure of the complex formed. In contrast to some results published recently in the literature, we found no reasonable support for β-CD to form an inclusion complex with 1-butyl-3-methyl-imidazolium cation of bmimPF6 in water. Our measurements on bmimPF6, the ionic liquid 1-butyl-3-methylimidazolium chloride (bmimCl), and the inorganic salt potassium hexafluorophosphate (KPF6) consistently support the formation of a weak 1:1 inclusion complex of β-CD with hexafluorophosphate anion instead of the bmim+ cation. The thermodynamic parameters of the respective complexation were calculated. The binding constant was evaluated from ITC and proton, fluorine and phosphorus NMR measurements, and the complex formation enthalpy and entropy were obtained from ITC.
Collapse
|
37
|
Holm R, Madsen JC, Shi W, Larsen KL, Städe LW, Westh P. Thermodynamics of complexation of tauro- and glyco-conjugated bile salts with two modified β-cyclodextrins. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9831-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
38
|
|
39
|
Rak J, Kaplánek R, Král V. Solubilization and deaggregation of cobalt bis(dicarbollide) derivatives in water by biocompatible excipients. Bioorg Med Chem Lett 2010; 20:1045-8. [DOI: 10.1016/j.bmcl.2009.12.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Revised: 12/07/2009] [Accepted: 12/09/2009] [Indexed: 11/27/2022]
|
40
|
Jiang L, Yan Y, Huang J, Yu C, Jin C, Deng M, Wang Y. Selectivity and Stoichiometry Boosting of β-Cyclodextrin in Cationic/Anionic Surfactant Systems: When Host−Guest Equilibrium Meets Biased Aggregation Equilibrium. J Phys Chem B 2010; 114:2165-74. [DOI: 10.1021/jp911092y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
41
|
Messner M, Kurkov SV, Jansook P, Loftsson T. Self-assembled cyclodextrin aggregates and nanoparticles. Int J Pharm 2009; 387:199-208. [PMID: 19963052 DOI: 10.1016/j.ijpharm.2009.11.035] [Citation(s) in RCA: 243] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 11/25/2009] [Accepted: 11/29/2009] [Indexed: 11/28/2022]
Abstract
Cyclodextrins (CDs) are widely used as enabling pharmaceutical excipients, mainly as solubilizing complexing agents. CDs are cyclic oligosaccharides with hydrophilic outer surface and a somewhat lipophilic central cavity. In aqueous solutions CDs are able to solubilize lipophilic drugs by taking up some lipophilic moiety of the drug molecule into the central cavity, i.e. through formation of hydrophilic inclusion complexes. Recently it has been observed that that other types of CD complexes, such as non-inclusion complexes, are also participating in the CD solubilization of poorly soluble drugs. However, in aqueous solutions CDs are also able self-assemble to form nanosized aggregates that can contribute to their solubilizing properties. At low CD concentrations (at about 1%, w/v) the fraction of CD molecules forming aggregates is insignificant but the aggregation increases rapidly with increasing CD concentration. Also, formation of CD complexes can increase the tendency of CDs to form aggregates and can lead to formation of micellar-type CD aggregates capable to solubilize poorly soluble compounds that do not readily form inclusion complexes. In this article formation of CD aggregates and CD nanoparticles is reviewed with emphasis on the physicochemical properties of self-assembled CDs and CD complexes.
Collapse
Affiliation(s)
- Martin Messner
- Faculty of Pharmaceutical Sciences, University of Iceland, Hagi, Hofsvallagata 53, IS-107 Reykjavik, Iceland
| | | | | | | |
Collapse
|
42
|
Fragmentation of molecule-induced γ-cyclodextrin nanotubular suprastructures due to drug dosage. J Colloid Interface Sci 2009; 337:294-9. [DOI: 10.1016/j.jcis.2009.04.090] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2009] [Revised: 04/28/2009] [Accepted: 04/28/2009] [Indexed: 11/20/2022]
|
43
|
Han Y, Liu Y, Rockenbauer A, Zweier JL, Durana G, Villamena FA. Lipophilic beta-cyclodextrin cyclic-nitrone conjugate: synthesis and spin trapping studies. J Org Chem 2009; 74:5369-80. [PMID: 19530689 PMCID: PMC2736355 DOI: 10.1021/jo900856x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Nitrone spin traps are commonly employed as probes for the identification of transient radicals in chemical and biological systems using electron paramagnetic resonance (EPR) spectroscopy. Nitrones have also found applications as therapeutic agent in the treatment of radical-mediated diseases. Therefore, a spin trap that incorporates high reactivity to superoxide radical anion (O2(*-)), more persistent superoxide adduct, enhanced bioavailability, and selective targeting in one molecular design is desirable. In this work, the synthesis of a nitrone spin trap, 4, that is tethered via amide bonds to a beta-cyclodextrin (beta-CD) and a dodecyl chain was achieved with the expectation that the beta-cyclodextrin would lead to increased reactivity to O2(*-) and persistent O2(*-) adduct while the lipophilic chain would impart membrane targeting property. The two constitutional racemic isomers, 4a and 4b, were separated using preparative HPLC, and structural analysis and self-aggregation properties were carried out using NMR, induced circular dichroism, dynamic light scattering, transmission electron microscopy, and computational approach. EPR spin trapping of O2(*-) by 4a and 4b was only successful in DMSO and not in an aqueous system, due most likely to the amphiphilic character of 4 that can favor conformations (or aggregation) hindering radical addition to nitrone. Kinetics of formation and decay of the 4a-O2H adduct in polar aprotic solvents show faster reactivity to O2(*-) and more persistent O2(*-) adduct compared to nitrones not conjugated to beta-CD. Computational analysis of 4a and 4b as well as 4a-OOH and 4b-OOH adducts were carried out, and results show that isomerism, both constitutional and stereochemical, affects the orientations of aminoxyl-NO and/or hydroperoxyl groups relative to the beta-CD annulus for optimal H-bond interaction and stability.
Collapse
Affiliation(s)
- Yongbin Han
- Department of Pharmacology, The Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210
| | - Yangping Liu
- Center for Biomedical EPR Spectroscopy and Imaging, The Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210
| | - Antal Rockenbauer
- Chemical Research Center, Institute of Structural Chemistry, H-1025 Budapest, Pusztaszeri 59, Hungary
| | - Jay L. Zweier
- Center for Biomedical EPR Spectroscopy and Imaging, The Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210
| | - Grégory Durana
- Laboratoire de Chimie BioOrganique et des Systèmes Moléculaires Vectoriels, Faculté des Sciences, Université d’Avignon et des Pays de Vaucluse, 33 Rue Louis Pasteur, 84000 Avignon, France
| | - Frederick A. Villamena
- Department of Pharmacology, The Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210
- Center for Biomedical EPR Spectroscopy and Imaging, The Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210
| |
Collapse
|
44
|
Sowmiya M, Purkayastha P, Tiwari AK, Jaffer SS, Saha SK. Characterization of guest molecule concentration dependent nanotubes of β-cyclodextrin and their secondary assembly: Study with trans-2-[4(dimethylamino)styryl]benzothiazole, a TICT-fluorescence probe. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.05.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
45
|
Jiang L, Deng M, Wang Y, Liang D, Yan Y, Huang J. Special Effect of β-Cyclodextrin on the Aggregation Behavior of Mixed Cationic/Anionic Surfactant Systems. J Phys Chem B 2009; 113:7498-504. [DOI: 10.1021/jp811455f] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lingxiang Jiang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China, and Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Manli Deng
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China, and Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Yilin Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China, and Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Dehai Liang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China, and Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Yun Yan
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China, and Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Jianbin Huang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China, and Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
| |
Collapse
|
46
|
Abstract
The continuing challenge of using cyclodextrins (CDs) for solubilization and drug targeting has led to the preparation of a wide variety of chemically modified derivatives in order to improve the properties of these host molecules. A possible approach for pharmaceutical applications would be to combine the recognition specificity of CDs with the transport properties of organized structures such as vesicles, liposomes, or micelles. Amphiphilic CDs can be admixed to phospholipid monolayers and to liposomes, and they can be dispersed into nanospheres showing promising properties for drug encapsulation. Monoacylated derivatives of β-CD, Mod-CD (Cn), were synthesized in our laboratory from the reaction of alkenyl succinic anhydride with β-CD. We found that the compound with 10 carbon atoms in the alkenyl chain, Mod-CD (C10), can be incorporated into inverted micelles. We studied their properties in solution and at the air-water interface. In solution they have very low critical micellar concentration, and in the aggregates there are two recognition sites: one is the cavity of the CD and the other is formed by the hydrophobic tails. The alkenyl chain interacts with the cavity, but this is not an obstacle for the association with external guests such as 1-amino adamantane, phenolphthalein, or Prodan. Mod-CD (Cn) with n equal to 10, 14, and 16 (n indicates the number of carbons in the alkenyl chain), form stable monolayers at the air-water interface and they adopt an organization very different from those found for persubstituted CDs. The differences are attributed to the higher conformational flexibility of these compounds, which allows the organization of the CD units with the cavity perpendicular to the interface.
Collapse
|
47
|
Ionita G, Caragheorgheopol A, Caldararu H, Jones L, Chechik V. Inclusion complexes of cyclodextrins with nitroxide-based spin probes in aqueous solutions. Org Biomol Chem 2008; 7:598-602. [PMID: 19156327 DOI: 10.1039/b817290k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Formation of inclusion complexes between several cyclodextrin derivatives and TEMPO and DOXYL-based spin probes was studied by EPR spectroscopy. Competition between alkyl chains and nitroxide functionalities for cyclodextrin cavities leads to different types of complexation. Long alkyl chains in amphiphilic spin probes interact preferentially with cyclodextrins, and TEMPO units in such molecules are unaffected by complexation. DOXYL-type spin probes however form stronger complexes with cyclodextrins; this complexation changes hyperfine splitting and tumbling rate of the nitroxide group. Comparison of EPR spectra of free cyclodextrin and cyclodextrin-based polymeric nanocapsules made it possible to assess the tumbling of the spin probe inside the cyclodextrin units without the contribution of the tumbling of the whole complex.
Collapse
Affiliation(s)
- Gabriela Ionita
- Laboratory of Quantum Chemistry and Molecular Structure, Institute of Physical Chemistry Ilie Murgulescu, Splaiul Independentei 202, Bucharest, 060021, Romania.
| | | | | | | | | |
Collapse
|
48
|
Vico RV, Silva OF, de Rossi RH, Maggio B. Molecular organization, structural orientation, and surface topography of monoacylated beta-cyclodextrins in monolayers at the air-aqueous interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:7867-7874. [PMID: 18582128 DOI: 10.1021/la800115q] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The surface behavior of monoacylated beta-cyclodextrins, with hydrocarbon chains of 16, 14, and 10 carbons, has been assessed by the measurement of the surface pressure, surface (dipole) potential, optical reflectivity, and surface topography in monolayers at the air-water interface. For all the derivatives studied, the intermolecular organization adopted along compression-decompression isotherms reveals a rich variety of packing states which imply profound reorganization of the hydrophobic and hydrophilic moieties of the beta-cyclodextrin derivatives in the film, depending on the lateral surface pressure. The intermolecular arrangements are consistent with the adoption of a different and defined orientation of the cyclic oligosaccharide unit, relative to the interfacial plane and the aqueous subphase. This is different from the behavior of the per-substituted derivatives, and none of the changes exhibited by the monosubstituted forms are consistent with the oligosaccharide ring remaining in a fixed orientation along the interface when the surface pressure is varied.
Collapse
Affiliation(s)
- Raquel V Vico
- Departamento de Quimica Biologica, Centro de Investigaciones en Quimica Biologica de Cordoba, Facultad de Ciencias Quimicas, Universidad Nacional de Cordoba, Haya de la Torre y Medina Allende, Ciudad Universitaria, Cordoba, Argentina
| | | | | | | |
Collapse
|
49
|
Supramolecular structures based on dimeric combinations of cyclodextrin and adamantane via click chemistry. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9457-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
50
|
Lo Nostro P, Giustini L, Fratini E, Ninham BW, Ridi F, Baglioni P. Threading, Growth, and Aggregation of Pseudopolyrotaxanes. J Phys Chem B 2008; 112:1071-81. [DOI: 10.1021/jp075380q] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pierandrea Lo Nostro
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino (Firenze), Italy, and Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200
| | - Luca Giustini
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino (Firenze), Italy, and Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200
| | - Emiliano Fratini
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino (Firenze), Italy, and Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200
| | - Barry W. Ninham
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino (Firenze), Italy, and Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200
| | - Francesca Ridi
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino (Firenze), Italy, and Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200
| | - Piero Baglioni
- Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino (Firenze), Italy, and Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200
| |
Collapse
|