1
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Chabaud B, Bonnet H, Lartia R, Van Der Heyden A, Auzély-Velty R, Boturyn D, Coche-Guérente L, Dubacheva GV. Influence of Surface Chemistry on Host/Guest Interactions: A Model Study on Redox-Sensitive β-Cyclodextrin/Ferrocene Complexes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4646-4660. [PMID: 38387876 DOI: 10.1021/acs.langmuir.3c03279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
While host/guest interactions are widely used to control molecular assembly on surfaces, quantitative information on the effect of surface chemistry on their efficiency is lacking. To address this question, we combined electrochemical characterization with quartz crystal microbalance with dissipation monitoring to study host/guest interactions between surface-attached ferrocene (Fc) guests and soluble β-cyclodextrin (β-CD) hosts. We identified several parameters that influence the redox response, β-CD complexation ability, and repellent properties of Fc monolayers, including the method of Fc grafting, the linker connecting Fc with the surface, and the diluting molecule used to tune Fc surface density. The study on monovalent β-CD/Fc complexation was completed by the characterization of multivalent interactions between Fc monolayers and β-CD-functionalized polymers, with new insights being obtained on the interplay between the surface chemistry, binding efficiency, and reversibility under electrochemical stimulus. These results should facilitate the design of well-defined functional interfaces and their implementation in stimuli-responsive materials and sensing devices.
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Affiliation(s)
- Baptiste Chabaud
- Département de Chimie Moléculaire, Université Grenoble Alpes, CNRS UMR 5250, 570 rue de la chimie, CS 40700, 38000 Grenoble, France
| | - Hugues Bonnet
- Département de Chimie Moléculaire, Université Grenoble Alpes, CNRS UMR 5250, 570 rue de la chimie, CS 40700, 38000 Grenoble, France
| | - Rémy Lartia
- Département de Chimie Moléculaire, Université Grenoble Alpes, CNRS UMR 5250, 570 rue de la chimie, CS 40700, 38000 Grenoble, France
| | - Angéline Van Der Heyden
- Département de Chimie Moléculaire, Université Grenoble Alpes, CNRS UMR 5250, 570 rue de la chimie, CS 40700, 38000 Grenoble, France
| | | | - Didier Boturyn
- Département de Chimie Moléculaire, Université Grenoble Alpes, CNRS UMR 5250, 570 rue de la chimie, CS 40700, 38000 Grenoble, France
| | - Liliane Coche-Guérente
- Département de Chimie Moléculaire, Université Grenoble Alpes, CNRS UMR 5250, 570 rue de la chimie, CS 40700, 38000 Grenoble, France
| | - Galina V Dubacheva
- Département de Chimie Moléculaire, Université Grenoble Alpes, CNRS UMR 5250, 570 rue de la chimie, CS 40700, 38000 Grenoble, France
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2
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Solubility enhancement and application of cyclodextrins in local drug delivery. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2019. [DOI: 10.1007/s40005-019-00434-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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3
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Muankaew C, Loftsson T. Cyclodextrin-Based Formulations: A Non-Invasive Platform for Targeted Drug Delivery. Basic Clin Pharmacol Toxicol 2017; 122:46-55. [PMID: 29024354 DOI: 10.1111/bcpt.12917] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 09/20/2017] [Indexed: 12/26/2022]
Abstract
Cyclodextrins (CDs) are recognized as promising pharmaceutical excipients due to their unique ability to form water-soluble inclusion complexes with various poorly soluble compounds. The numerous investigations on CDs and their use in nanomedicine have received considerable attention in the last three decades, leading to the rapid development of new CD-containing formulations that significantly facilitate targeted drug delivery and controlled drug release, with consequent improvements in drug bioavailability. This MiniReview highlights the efficacy and recent uses of CDs for non-invasive drug delivery. Using ophthalmic and nasal drug delivery as examples, an overview of chemical properties, mechanisms of CDs on drug solubilization, stabilization and permeation, along with their toxicological profiles relevant to nasal and ocular administration, are provided and discussed. The recent development and application of CD-based nanocarrier systems for targeted drug delivery are summarized.
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Affiliation(s)
| | - Thorsteinn Loftsson
- Faculty of Pharmaceutical Sciences, University of Iceland, Reykjavik, Iceland
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Méndez-Ardoy A, Steentjes T, Boukamp BA, Jonkheijm P, Kudernac T, Huskens J. Electron-Transfer Rates in Host-Guest Assemblies at β-Cyclodextrin Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8614-8623. [PMID: 28013541 DOI: 10.1021/acs.langmuir.6b03860] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The effect of the distance between a β-cyclodextrin (βCD) host core and a conductive substrate on the electron-transfer rate of complexed guests as well as of free-diffusing electrochemically active probes has been studied. First we have evaluated a set of short-tethered βCD adsorbates bearing different anchoring groups in order to get a reliable platform for the study of short-distance electron transfer. An electrochemically active trivalent guest was immobilized on these host monolayers in a selective and reversible manner, providing information about the packing density. Iodine- and nitrile-functionalized βCD monolayers gave coverages close to maximum packing. Electron transfer in the presence of Fe(CN)63-/4- studied by impedance spectroscopy revealed that the electron transfer of the diffusing probe was 3 orders of magnitude faster than when the βCD cores were separated from the surface by undecyl chains. When an electrochemically active guest was immobilized on the surface, electron-transfer rate measurements by cyclic voltammetry and capacitance spectroscopy showed differences of up to a factor of 8 for different βCD monolayers. These results suggest that increasing the distance between the βCD core and the underlying conductive substrate leads to a diminishing of the electron-transfer rate.
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Affiliation(s)
- Alejandro Méndez-Ardoy
- Molecular Nanofabrication Group and ‡Inorganic Materials Science Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Tom Steentjes
- Molecular Nanofabrication Group and ‡Inorganic Materials Science Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Bernard A Boukamp
- Molecular Nanofabrication Group and ‡Inorganic Materials Science Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Pascal Jonkheijm
- Molecular Nanofabrication Group and ‡Inorganic Materials Science Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Tibor Kudernac
- Molecular Nanofabrication Group and ‡Inorganic Materials Science Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Jurriaan Huskens
- Molecular Nanofabrication Group and ‡Inorganic Materials Science Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
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Abstract
Binding free energy calculations based on molecular simulations provide predicted affinities for biomolecular complexes. These calculations begin with a detailed description of a system, including its chemical composition and the interactions among its components. Simulations of the system are then used to compute thermodynamic information, such as binding affinities. Because of their promise for guiding molecular design, these calculations have recently begun to see widespread applications in early-stage drug discovery. However, many hurdles remain in making them a robust and reliable tool. In this review, we highlight key challenges of these calculations, discuss some examples of these challenges, and call for the designation of standard community benchmark test systems that will help the research community generate and evaluate progress. In our view, progress will require careful assessment and evaluation of new methods, force fields, and modeling innovations on well-characterized benchmark systems, and we lay out our vision for how this can be achieved.
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Affiliation(s)
- David L Mobley
- Department of Pharmaceutical Sciences and Department of Chemistry, University of California, Irvine, California 92697;
| | - Michael K Gilson
- Skaggs School of Pharmacy and Pharmaceutical Sciences and Center for Drug Discovery Innovation, University of California, San Diego, La Jolla, California 92093;
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6
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Affiliation(s)
- Sanem Senler
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Wei Li
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Mohammad Hossein Tootoonchi
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Song Yi
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
| | - Angel E. Kaifer
- Department of Chemistry, Center for Supramolecular Science, University of Miami, Coral Gables, FL 33124-0431, USA
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Mangiapia G, Sartorio R. 1:1 and 1:2 Inclusion Complexes of Di-tert-butyl l-tartrate with α-Cyclodextrin: A Diffusion Study. J SOLUTION CHEM 2014. [DOI: 10.1007/s10953-013-0124-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Hu R, Zhang L, Li H. A highly sensitive and selective colorimetric sensor for the detection of Mn2+ based on supramolecular silver nanoparticle clusters. NEW J CHEM 2014. [DOI: 10.1039/c3nj01593a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A colorimetric sensor decorated with β-cyclodextrin and adamantine has been designed to enhance the sensitivity of Mn2+ detection.
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Affiliation(s)
- Ren Hu
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079, P.R. China
| | - Liang Zhang
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079, P.R. China
| | - Haibing Li
- Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan 430079, P.R. China
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9
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Li F, Ito T. Complexation-Induced Control of Electron Propagation Based on Bounded Diffusion through Nanopore-Tethered Ferrocenes. J Am Chem Soc 2013; 135:16260-3. [DOI: 10.1021/ja407002d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Feng Li
- Department of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
| | - Takashi Ito
- Department of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
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10
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Car Ž, Kodrin I, Požar J, Ribić R, Kovačević D, Peroković VP. Experimental and computational study of the complexation of adamantyl glycosides with β-cyclodextrin. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.06.097] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Purkayastha P, Jaffer SS, Ghosh P. Physicochemical perspective of cyclodextrin nano and microaggregates. Phys Chem Chem Phys 2012; 14:5339-48. [PMID: 22428167 DOI: 10.1039/c2cp24052a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
''Chemistry beyond the molecule'' is the nickname for supramolecular chemistry. This branch of study is based on molecular recognition that is host-guest chemistry. A number of potential hosts have been defined and applied in scores of studies. Among all potential hosts, cyclodextrins occupy a high position due to their characteristic solubilisation capability and biocompatibility. In the present article we are revisiting the host-guest aspects of cyclodextrins from a physicochemical perspective. We present details of formation and applications of cyclodextrin nanoaggregates induced by guest molecules, the concerned thermodynamics behind the process and also the effect of concentration of the guest molecules on the morphology of the aggregates. This article reviews the topic mainly from the spectroscopic point of view.
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Affiliation(s)
- Pradipta Purkayastha
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741252, WB, India.
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12
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Takashima Y, Fukui Y, Otsubo M, Hamada N, Yamaguchi H, Yamamoto H, Harada A. Emission properties of cyclodextrin dimers linked with perylene diimide—effect of cyclodextrin tumbling. Polym J 2012. [DOI: 10.1038/pj.2011.128] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Domi Y, Ikeura K, Okamura K, Shimazu K, Porter MD. Strong inclusion of inorganic anions into β-cyclodextrin immobilized to gold electrode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10580-10586. [PMID: 21728339 DOI: 10.1021/la1051063] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The inclusion of inorganic anions such as SO(4)(2-), NO(3)(-), and HPO(4)(2-) into the cavity of β-cyclodextrin monolayers on Au was examined by X-ray photoelectron spectroscopy (XPS), a quartz crystal microbalance (QCM), and chronocoulometric measurements of the competitive inclusion with ferrocene. The inclusion amounts of ferrocence in 0.2 M Na(2)SO(4), NaNO(3), and Na(2)HPO(4) solutions were less than 6% of the adsorption amount of β-cyclodextrin on Au, resulting in the apparent inhibition of the ferrocene redox reaction. The surface association constants of these anions reached about 10 on a logarithmic scale and were much higher than those for the inclusion of common organic guest compounds. A stronger anion inclusion was also demonstrated by the QCM response corresponding to the replacement of a preincluded organic guest with sulfate upon the injection of the sulfate solution. Quantitative analysis of the XPS data suggested a 1:1 association for each of these anions per surface β-cyclodextrin. There was no detectable inclusion for ClO(4)(-), Cl(-), and Br(-).
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Affiliation(s)
- Yasuhiro Domi
- Division of Environmental Materials Science, Graduate School of Environmental Science, Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
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14
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Adams J, Hollas M, Chung MA, Park JW, Hong JH, Park KK. Complexation behaviour of polymers with pendant cyclodextrin side groups. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19991420116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Sakamoto K, Takashima Y, Hamada N, Ichida H, Yamaguchi H, Yamamoto H, Harada A. Selective Photoinduced Energy Transfer from a Thiophene Rotaxane to Acceptor. Org Lett 2011; 13:672-5. [DOI: 10.1021/ol102912g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuya Sakamoto
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Yoshinori Takashima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Norio Hamada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Hideki Ichida
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Hiroyasu Yamaguchi
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Hitoshi Yamamoto
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Akira Harada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
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16
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Paul BK, Guchhait N. Constrained photophysics of an ESIPT probe within β-cyclodextrin nanocavity and chaotrope-induced perturbation of the binding phenomenon: Implication towards hydrophobic interaction mechanism between urea and the molecular probe. J Colloid Interface Sci 2011; 353:237-47. [DOI: 10.1016/j.jcis.2010.09.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 09/04/2010] [Accepted: 09/08/2010] [Indexed: 01/30/2023]
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17
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Wang W, Kaifer AE. Transfer of cationic cucurbit[7]uril inclusion complexes from water to non-aqueous solvents. Supramol Chem 2010. [DOI: 10.1080/10610278.2010.500729] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Wei Wang
- a Department of Chemistry , Center for Supramolecular Science, University of Miami , Coral Gables , FL , 33124-0431 , USA
| | - Angel E. Kaifer
- a Department of Chemistry , Center for Supramolecular Science, University of Miami , Coral Gables , FL , 33124-0431 , USA
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18
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Wang Q, He R, Cheng X, Lu C. The inclusion complexes between [Zn(dmit)2]2− anion and cyclodextrins: studied by induced circular dichroism spectra and density functional theory calculations. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9834-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Jaffer SS, Purkayastha P. Steady state fluorescence spectroscopic technique to reveal the thermodynamics of fragmentation of compound induced α-cyclodextrin nanotubular suprastructures. J Colloid Interface Sci 2010; 342:57-61. [DOI: 10.1016/j.jcis.2009.10.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Revised: 10/08/2009] [Accepted: 10/09/2009] [Indexed: 10/20/2022]
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20
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Hammitzsch-Wiedemann M, Scriba GKE. Effect of urea on analyte complexation by 2,6-dimethyl-β-CD in peptide enantioseparations by CE. Electrophoresis 2009; 30:3764-71. [DOI: 10.1002/elps.200900384] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Cotí KK, Belowich ME, Liong M, Ambrogio MW, Lau YA, Khatib HA, Zink JI, Khashab NM, Stoddart JF. Mechanised nanoparticles for drug delivery. NANOSCALE 2009; 1:16-39. [PMID: 20644858 DOI: 10.1039/b9nr00162j] [Citation(s) in RCA: 389] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Time and time again humanity is faced with a unifying global crisis that crosses the many great divides in different societies and serves to bring once segregated communities back together as a collective whole. This global community instinctively turns to science to develop the means of addressing its most pressing problems. More often than not, these forces dictate the direction that scientific research takes. This influence is no more apparent than in the field of supramolecular chemistry where, for decades now, its responsibility to tackle such issues has been put on the back burner as a consequence of a lack of platforms with which to deliver this contemporary brand of chemistry to meaningful applications. However, the tide is slowly turning as new materials emerge from the field of nanotechnology that are poised to host the many attractive attributes that are inherent in the chemistry of these supermolecules and also in the mechanostereochemistry of mechanically interlocked molecules (MIMs), which can be reused as a sequel to supramolecular chemistry. Mesoporous silica nanoparticles (SNPs) have proven to be supremely effective solid supports as their surfaces are easily functionalised with either supermolecules or MIMs. In turn, the blending of supramolecular chemistry and mechanostereochemistry with mesoporous SNPs has led to a new class of materials - namely, mechanised SNPs that are effectively biological nanoscale 'bombs' that have the potential to infiltrate cells and then, upon the pulling of a chemical trigger, explode! The development of these materials has been driven by the need to devise new therapies for the treatment of cancer. Recent progress in research promises not only to control the acuteness of this widespread and insidious disease, but also to make the harsh treatment less debilitating to patients. This global scourge is the unifying force that has brought together supramolecular chemistry, mechanostereochemistry and nanotechnology, uniting these three communities for the common good. At the nanoscale level, the mechanism for the release of cargos from the confines of the nanopores in the SNPs is accomplished by way of mechanical modifications made on the surface of these functionalised supports. These mechanical motions rely on both supramolecular, i.e., host-guest complexes, and mechanostereochemical phenomena (e.g., bistable rotaxanes), which are often stimulated by changes in pH, light and redox potentials, in addition to enzymatic catalysis. The future of this field lies in the development of 'smart bombs' wherein the loaded mechanised SNPs are endocytosed selectively by cancer cells, whereupon an intracellular trigger causes release of a cytotoxin, effectively leading to apoptosis. This review serves to highlight (1) the evolution of surface-functionalisation of SNPs with supermolecules and also with MIMs, (2) the mechanisms through which controlled-release of cargo from mechanised SNPs occurs, and (3) results from the in vitro application of these mechanised SNPs.
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Affiliation(s)
- Karla K Cotí
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
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22
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Khashab NM, Trabolsi A, Lau YA, Ambrogio MW, Friedman DC, Khatib HA, Zink JI, Stoddart JF. Redox- and pH-Controlled Mechanized Nanoparticles. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801300] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Wang W, Kaifer* AE. Cucurbituril and Cyclodextrin Complexes of Dendrimers. ADVANCES IN POLYMER SCIENCE 2009. [DOI: 10.1007/12_2008_1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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24
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Casas-Solvas J, Ortiz-Salmerón E, Giménez-Martínez J, García-Fuentes L, Capitán-Vallvey L, Santoyo-González F, Vargas-Berenguel A. Ferrocene-Carbohydrate Conjugates as Electrochemical Probes for Molecular Recognition Studies. Chemistry 2009; 15:710-25. [DOI: 10.1002/chem.200800927] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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Suresh P, Pitchumani K. Per-6-amino-β-cyclodextrin as an Efficient Supramolecular Ligand and Host for Cu(I)-Catalyzed N-Arylation of Imidazole with Aryl Bromides. J Org Chem 2008; 73:9121-4. [DOI: 10.1021/jo801811w] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Kasi Pitchumani
- School of Chemistry, Madurai Kamaraj University, Madurai-625021, India
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26
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Deng W, Yamaguchi H, Takashima Y, Harada A. Construction of Chemical-Responsive Supramolecular Hydrogels from Guest-Modified Cyclodextrins. Chem Asian J 2008; 3:687-95. [DOI: 10.1002/asia.200700378] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sun H, Gibb CLD, Gibb BC. Calorimetric Analysis of the 1:1 Complexes Formed between a Water-soluble Deep-cavity Cavitand, and Cyclic and Acyclic Carboxylic Acids. Supramol Chem 2008. [DOI: 10.1080/10610270701744302] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Hao Sun
- a University of New Orleans, Department of Chemistry , New Orleans, LA, 70148, USA
| | - Corinne L. D. Gibb
- a University of New Orleans, Department of Chemistry , New Orleans, LA, 70148, USA
| | - Bruce C. Gibb
- a University of New Orleans, Department of Chemistry , New Orleans, LA, 70148, USA
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Zhang A, Liu W. Inclusion effect of alpha-cyclodextrin on chemical degradation of malathion water. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2008; 54:355-362. [PMID: 17938993 DOI: 10.1007/s00244-007-9055-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2007] [Accepted: 09/24/2007] [Indexed: 05/25/2023]
Abstract
Chemical degradation of malathion in water is one of the important environmental processes of malathion, and plays a critical role in detoxification of malathion. Alpha-cyclodextrin (alpha-CD), one of the cyclic oligosaccharides different from beta-cyclodextrin (beta-CD) in glucose units, solubility, and size of cavity, is capable of producing an environmental effect different from those of the latter CD and its derivatives. This work evaluated the effect of alpha-CD on chemical degradation of malathion in water in an attempt to further study the effects of different CDs on hydrolysis of malathion and assess the potential applications of alpha-CD in remediation of malathion contamination. The results showed that alpha-CD had a remarkable facilitative effect on the hydrolysis of malathion in both buffer solutions and natural surface waters. The facilitative effects of alpha-CD were an obverse function of pH value and inverse function of temperature. The rate constant of malathion hydrolysis increased with increasing the concentration of alpha-CD in both types of waters. Urea, a compound widely used in agriculture, decreased the facilitative effect of alpha-CD at 25 degrees C and pH 9.0. The formation of inclusion complexes between alpha-CD and malathion was evidenced by nuclear magnetic resonance studies.
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Affiliation(s)
- Anping Zhang
- Research Center of Environmental Science, College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China
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29
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Hammitzsch-Wiedemann M, Scriba GKE. Influence of buffer substances and urea on the β-cyclodextrin-mediated chiral separation of dipeptides in CE. Electrophoresis 2007; 28:2619-28. [PMID: 17592612 DOI: 10.1002/elps.200600728] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The influence of buffering substances and urea on the beta-CD-mediated chiral separations of the dipeptides Ala-Phe and Ala-Tyr was studied in the pH range of 2.5-3.8. Only minor effects of the buffer substances on the chiral separation selectivity alpha were observed at a beta-CD concentration of 15 mg/mL. In contrast, the selectivity improved at pH 2.5 but decreased at pH 3.8 upon the addition of 2 M urea. Complexation by beta-CD resulted in a shift of the pK(a) values toward higher values which was more pronounced for the DD-enantiomers of both dipeptides than for the LL-enantiomers. Addition of urea further increased the pK(a) shift. The consequence of this pK(a) shift is an increase of the fraction of the protonated, positively charged form of the peptides which explained the improved chiral separation at pH 2.5 and the reduced selectivity at pH 3.8. A pK(a) shift by the addition of urea was also observed for N-tert-butyloxycarbonyl phenylalanine (BOC-Phe) as a model compound that is strongly complexed by beta-CD. This effect was not stereospecific. Addition of urea resulted in a decrease of the apparent complexation constants between beta-CD and the BOC-Phe enantiomers to the same extent but this did not affect the separation selectivity alpha. For chiral separations that display strong pH dependence such as peptide enantioseparations close to the pK(a) values of the compounds, urea may not solely be regarded as a solubility enhancer for beta-CD but may also influence the separation.
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30
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Carrazana J, Jover A, Meijide F, Soto VH, Vazquez Tato J. Complexation of adamantyl compounds by beta-cyclodextrin and monoaminoderivatives. J Phys Chem B 2007; 109:9719-26. [PMID: 16852171 DOI: 10.1021/jp0505781] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Since the beta-cyclodextrin cavity is not a smooth cone but has constrictions in the neighborhoods of the H3 and H5 atoms, the hypothesis that bulky hydrophobic guests can form two isomeric inclusion complexes (one of them, c(p), is formed by the entrance of the guest by the primary side of the cavity, and the other one, c(s), results from the entrance by the secondary side) is checked. Thus, the inclusion processes of two 1-substituted adamantyl derivatives (rimantidine and adamantylmethanol) with beta-cyclodextrin and its two monoamino derivatives at positions 6 (6-NH2beta-CD) and 3 (3-NH2beta-CD) were studied. From rotating-frame Overhauser enhancement spectroscopy experiments, it was deduced that both guests form c(s) complexes with beta-CD and 6-NH2beta-CD but c(p) complexes with 3-NH2beta-CD. In all cases, the hydrophilic group attached to the adamantyl residue protrudes toward the bulk solvent outside the cyclodextrin cavity. The thermodynamic parameters (free energy, equilibrium constant, enthalpy, and entropy) associated with the inclusion phenomena were measured by isothermal titration calorimetry experiments. From these results, the difference in the free energy for the formation of the two complexes, c(s) and c(p), for the same host/guest system has been estimated as being 11.5 +/- 0.8 kJ mol(-1). This large difference explains why under normal experimental conditions only one of the two complexes (c(s)) is detected. It is also concluded that a hyperboloid of revolution can be a better schematic picture to represent the actual geometry of the cyclodextrin cavities than the usual smooth cone or trapezium.
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Affiliation(s)
- Jorge Carrazana
- Departamento de Química Física, Facultade de Ciencias, Universidade de Santiago de Compostela, Campus de Lugo, Avda. Alfonso X El Sabio, s/n, 27002 Lugo, Spain
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31
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Pinjari RV, Joshi KA, Gejji SP. Molecular Electrostatic Potentials and Hydrogen Bonding in α-, β-, and γ-Cyclodextrins. J Phys Chem A 2006; 110:13073-80. [PMID: 17134168 DOI: 10.1021/jp065169z] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cyclodextrins (CDs) are cyclic oligomers of glucose having the toroid of sugars elaborating a central cavity of varying size depending on the number of glucoses. The central hydrophobic cavity of CD shows a binding affinity toward different guest molecules, which include small substituted benzenes to long chain surfactant molecules leading to a variety of inclusion complexes when the size and shape complementarity of host and guest are compatible. Further, interaction of guest molecules with the outer surface of alpha-CD has also been observed. Primarily it is the electrostatic interactions that essentially constitute a driving force for the formation of inclusion complexes. To gain insights for these interactions, the electronic structure and the molecular electrostatic potentials in alpha-, beta-, and gamma-CDs are derived using the hybrid density functional theory employing the three-parameter exchange correlation functional due to Becke, Lee, Yang, and Parr (B3LYP). The present work demonstrates how the topography of the molecular electrostatic potential (MESP) provides a measure of the cavity dimensions and understanding of the hydrogen-bonded interactions involving primary and secondary hydroxyl groups. In alpha-CD, hydrogen-bonded interactions between primary -OH groups engender a "cone-like" structure, while in beta- or gamma-CD the interactions from the primary -OH with ether oxygen in glucose ring facilitates a "barrel-like" structure. Further, the strength of hydrogen-bonded interactions of primary -OH groups follows the rank order alpha-CD > beta-CD > gamma-CD, while the secondary hydrogen-bonded interactions exhibit a reverse trend. Thus weak hydrogen-bonded interactions prevalent in gamma-CD manifest in shallow MESP minima near hydroxyl oxygens compared to those in alpha- or beta-CD. Furthermore, electrostatic potential topography reveals that the guest molecule tends to penetrate inside the cavity forming the inclusion complex in beta- or gamma-CD.
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Affiliation(s)
- Rahul V Pinjari
- Department of Chemistry, University of Pune, Ganeshkhind, Pune 411007, India
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32
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Evans MA, Louie AD, Hoss DR, Allen GH, Nishimura AM. Disorder-to-Order Transition of 1,4-Dimethylnaphthalene: Formation of Molecular Complex with Water and p-Xylene on Al 2O 3 (0001). J Phys Chem B 2006; 110:19758-62. [PMID: 17020358 DOI: 10.1021/jp0618936] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Amorphous 1,4-dimethylnaphthalene, DMN, that can be prepared by vacuum deposition on Al2O3 exhibits relatively intense excimer fluorescence. Upon heating the surface, the adlayer undergoes a disorder-to-order transition, signaled by a decrease in excimer and an increase in monomer fluorescence. In a bilayer experiment, water, which has a lower desorption temperature than DMN, is vacuum deposited first, followed by DMN. When the surface is heated, water percolates through the DMN and forms a molecular H2O-DMN surface complex that desorbs simultaneously. The stoichiometric ratio of this complex was determined to be (DMN)(1.4+/-0.3).H2O. When the bilayer was formed with p-xylene, a complex of DMN-p-xylene was observed that had the stoichiometry of (DMN)(7.9+/-1).p-xylene.
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Affiliation(s)
- M A Evans
- Chemistry Department, Westmont College, Santa Barbara, California 93108, USA
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33
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Khemtong C, Banerjee D, Liu Y, El Khoury JM, Rinaldi PL, Hu J. Formation of an Inclusion Complex of a New Transition Metal Ligand in β-Cyclodextrin. Supramol Chem 2006. [DOI: 10.1080/10610270500115563] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Chalermchai Khemtong
- a Department of Chemistry , The University of Akron , Akron, OH, 44325-3601, USA
| | - Debasish Banerjee
- a Department of Chemistry , The University of Akron , Akron, OH, 44325-3601, USA
| | - Yubiao Liu
- a Department of Chemistry , The University of Akron , Akron, OH, 44325-3601, USA
| | | | - Peter L. Rinaldi
- a Department of Chemistry , The University of Akron , Akron, OH, 44325-3601, USA
| | - Jun Hu
- a Department of Chemistry , The University of Akron , Akron, OH, 44325-3601, USA
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34
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Eckel R, Ros R, Decker B, Mattay J, Anselmetti D. Supramolecular chemistry at the single-molecule level. Angew Chem Int Ed Engl 2006; 44:484-8. [PMID: 15624136 DOI: 10.1002/anie.200461382] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rainer Eckel
- Experimental Biophysics and Applied Nanoscience, Bielefeld University, Universitätsstrasse 25, 33615 Bielefeld, Germany
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35
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Hapiot F, Tilloy S, Monflier E. Cyclodextrins as Supramolecular Hosts for Organometallic Complexes. Chem Rev 2006; 106:767-81. [PMID: 16522008 DOI: 10.1021/cr050576c] [Citation(s) in RCA: 334] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F Hapiot
- Université d'Artois, Laboratoire de Physico-Chimie des Interfaces et Applications, FRE CNRS 2485, Rue Jean Souvraz, SP 18-62307 Lens Cédex, France
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36
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Arimoto H, Shimano T, Uemura D. Concise synthesis of the plant growth regulator theobroxide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2005; 53:3863-6. [PMID: 15884808 DOI: 10.1021/jf0500637] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A plant growth regulator, theobroxide, which produces potato tubers under noninduced long-day conditions, was synthesized in four steps from dihydrotoluene.
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Affiliation(s)
- Hirokazu Arimoto
- Department of Chemistry, Graduate School of Science, and Institute for Advanced Research, Nagoya University, Chikusa, Nagoya 464-8602, Japan.
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37
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Harries D, Rau DC, Parsegian VA. Solutes probe hydration in specific association of cyclodextrin and adamantane. J Am Chem Soc 2005; 127:2184-90. [PMID: 15713096 DOI: 10.1021/ja045541t] [Citation(s) in RCA: 156] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using microcalorimetry, we follow changes in the association free energy of beta-cyclodextrin (CD) with the hydrophobic part of adamantane carboxylate (AD) due to added salt or polar (net-neutral) solutes that are excluded from the molecular interacting surfaces. Changes in binding constants with solution osmotic pressure (water activity) translate into changes in the preferential hydration upon complex formation. We find that these changes correspond to a release of 15-25 solute-excluding waters upon CD/AD association. Reflecting the preferential interaction of solute with reactants versus products, we find that changes in hydration depend on the type of solute used. All solutes used here result in a large change in the enthalpy of the CD-AD binding reaction. In one class of solutes, the corresponding entropy change is much smaller, while in the other class, the entropy change almost fully compensates the solute-specific enthalpy. For many of the solutes, the number of waters released correlates well with their effect on air-water surface tensions. We corroborate these results using vapor pressure osmometry to probe individually the hydration of reactants and products of association, and we discuss the possible interactions and forces between cosolute and hydrophobic surfaces responsible for different kinds of solute exclusion.
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Affiliation(s)
- Daniel Harries
- Laboratory of Physical and Structural Biology, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892-0924, USA.
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38
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Egawa Y, Ishida Y, Yamauchi A, Anzai JI, Suzuki I. Recognition of Bile Acids at Cyclodextrin-Modified Gold Electrodes. ANAL SCI 2005; 21:361-6. [PMID: 15844326 DOI: 10.2116/analsci.21.361] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Lipoylamino-beta- and gamma-cyclodextrin (LP-beta-CD and LP-gamma-CD, respectively) were adsorbed at the surface of gold electrodes by sulfur-gold bonding. The resultant electrodes exhibited quasi-reversible voltammograms for the redox reaction of Fe(CN)6(3-/4-) in aqueous solutions, with peak-to-peak separation (deltaEp) being 85 mV at 20 mV s(-1) as a potential sweep rate. When bile acids are added to the solution, deltaEp values increased to 200-300 mV with increasing the concentration of bile acids. A Langmuir-type adsorption analyses satisfactorily afforded the binding constants (Ksurf) of the surface-confined LP-beta-CD and LP-gamma-CD with the bile acids. The obtained Ksurf values of LP-gamma-CD are 5.0-50 times larger than the corresponding binding constants of gamma-CD in homogeneous aqueous solutions. Cyclic voltammetric experiments with positively, negatively, and non-charged adamantane derivatives as well as pH titration experiments revealed that the retardation of the electrode reaction of negatively charged Fe(CN)6(3-/4-) caused by bile acids was attributable (1) to electric potential changes due to the accumulation of the negative charges at the electrode surface, and (2) to an increase in the hydrophobicity of the electrode surface due to the binding of hydrophobic bile acids to the LP-beta-CD and LP-gamma-CD membranes.
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Affiliation(s)
- Yuya Egawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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39
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Eckel R, Ros R, Decker B, Mattay J, Anselmetti D. Supramolekulare Chemie mit einzelnen Molekülen. Angew Chem Int Ed Engl 2004. [DOI: 10.1002/ange.200461382] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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Newkome GR, Kim HJ, Choi KH, Moorefield CN. Synthesis of Neutral Metallodendrimers Possessing Adamantane Termini: Supramolecular Assembly with β-Cyclodextrin. Macromolecules 2004. [DOI: 10.1021/ma048996b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- George R. Newkome
- Departments of Polymer Science and Chemistry and Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-4717, and Department of Applied Chemistry, Chonnam National University, Kwangju 500-757, Korea
| | - Hyung Jin Kim
- Departments of Polymer Science and Chemistry and Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-4717, and Department of Applied Chemistry, Chonnam National University, Kwangju 500-757, Korea
| | - Kyung Ho Choi
- Departments of Polymer Science and Chemistry and Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-4717, and Department of Applied Chemistry, Chonnam National University, Kwangju 500-757, Korea
| | - Charles N. Moorefield
- Departments of Polymer Science and Chemistry and Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-4717, and Department of Applied Chemistry, Chonnam National University, Kwangju 500-757, Korea
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41
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Dimitrijevic NM, Rajh T, Saponjic ZV, de la Garza L, Tiede DM. Light-Induced Charge Separation and Redox Chemistry at the Surface of TiO2/Host−Guest Hybrid Nanoparticles. J Phys Chem B 2004. [DOI: 10.1021/jp049028d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Nada M. Dimitrijevic
- Chemistry Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439
| | - Tijana Rajh
- Chemistry Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439
| | - Zoran V. Saponjic
- Chemistry Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439
| | - Linda de la Garza
- Chemistry Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439
| | - David M. Tiede
- Chemistry Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439
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42
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Auletta T, de Jong MR, Mulder A, van Veggel FCJM, Huskens J, Reinhoudt DN, Zou S, Zapotoczny S, Schönherr H, Vancso GJ, Kuipers L. β-Cyclodextrin Host−Guest Complexes Probed under Thermodynamic Equilibrium: Thermodynamics and AFM Force Spectroscopy. J Am Chem Soc 2004; 126:1577-84. [PMID: 14759218 DOI: 10.1021/ja0383569] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The rupture forces of individual host-guest complexes between beta-cyclodextrin (beta-CD) heptathioether monolayers on Au(111) and several surface-confined guests were measured in aqueous medium by single molecule force spectroscopy using an atomic force microscope. Anilyl, toluidyl, tert-butylphenyl, and adamantylthiols (0.2-1%) were immobilized in mixed monolayers with 2-mercaptoethanol on gold-coated AFM tips. For all guests and for all surface coverages, the force-displacement curves measured between the functionalized tips and monolayers of beta-CD exhibited single, as well as multiple, pull-off events. The histograms of the pull-off forces showed several maxima at equidistant forces, with force quanta characteristic for each guest of 39 +/- 15, 45 +/- 15, 89 +/- 15, and 102 +/- 15 pN, respectively. These force quanta were independent of the loading rate, indicating that, because of the fast complexation/decomplexation kinetics, the rupture forces were probed under thermodynamic equilibrium. The force values followed the same trend as the free binding energy Delta G degrees measured for model guest compounds in solution or on beta-CD monolayers, as determined by microcalorimetry and surface plasmon resonance measurements, respectively. A descriptive model was developed to correlate quantitatively the pull-off force values with the Delta G degrees of the complexes, based on the evaluation of the energy potential landscape of tip-surface interaction.
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Affiliation(s)
- Tommaso Auletta
- Supramolecular Chemistry and Technology, MESA(+) Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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43
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Kano K, Nishiyabu R, Asada T, Kuroda Y. Static and dynamic behavior of 2:1 inclusion complexes of cyclodextrins and charged porphyrins in aqueous organic media. J Am Chem Soc 2002; 124:9937-44. [PMID: 12175256 DOI: 10.1021/ja020253n] [Citation(s) in RCA: 172] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin (TMe-beta-CD) molecules strongly include the peripheral substituents at the 5- and 15-positions of the charged meso-tetrasubstituted porphyrins, PorSub(4) [TPPS(4) (Sub = p-C(6)H(4)-SO(3)(-)), TPPOC3PS (p-C(6)H(4)-O-(CH(2))(3)-p-C(6)H(4)-SO(3)(-)), TCPP (Sub = p-C(6)H(4)-CO(2)(-)), and TPPOC3Py (p-C(6)H(4)-O-(CH(2))(3)-Py(+)Br(-)), where Py(+) = N-alkylpyridinium] in aqueous ethylene glycol. The binding constants (K(1) and K(2)) and the rate constants (k(1) and k(2)) for formation of the 1:1 and 2:1 complexes of TMe-beta-CD and PorSub(4) were determined. Both the binding constants and the rate constants for anionic TPPS(4), TCPP, and TPPOC3PS were much larger than those for cationic TPPOC3Py. The smaller k(1) and k(2) values for TPPOC3Py indicate a higher barrier for penetration of a cationic guest into the TMe-beta-CD cavity. The methyl groups at the rims and the cavity wall of the host are positively polarized due to the inductive effect of the ethereal oxygens. The positively polarized rims and interior of the host cavity should prevent the penetration of the cationic substituent of TPPOC3Py into the TMe-beta-CD cavity. The 2:1 TMe-beta-CD-PorSub(4) complexes are extraordinary stable in aqueous solutions, even in the case of cationic TPPOC3Py. Formation of both 1:1 and 2:1 complexes is promoted by negative and large enthalpy changes, suggesting a strong van der Waals interaction as the main binding force.
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Affiliation(s)
- Koji Kano
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
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44
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Liu J, Alvarez J, Ong W, Román E, Kaifer AE. Phase transfer of hydrophilic, cyclodextrin-modified gold nanoparticles to chloroform solutions. J Am Chem Soc 2001; 123:11148-54. [PMID: 11697957 DOI: 10.1021/ja003957a] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The preparation and characterization of gold nanoparticles (approximately 3 nm in diameter) capped with thiolated alpha- and beta-cyclodextrins (alpha and beta-CD) is described. The CD-capped nanoparticles are hydrophilic and bind ferrocene derivatives as evidenced by electrochemical and (1)H NMR spectroscopic measurements. The binding interactions of the CD-capped nanoparticles with a series of five alkyldimethyl(ferrocenylmethyl)ammonium ions (the alkyl group is propyl for compound 1, heptyl for 2, dodecyl for 3, hexadecyl for 4, and docosyl for 5) can be utilized for the phase transfer of the hydrophilic, CD-capped nanoparticles into a nonpolar chloroform phase. Only 3, 4, and 5 act as effective phase transfer agents, since 1 and 2 do not have enough amphiphilic character. The structure of the aggregates formed upon transfer of the CD-capped nanoparticles to the chloroform solution is postulated to resemble that of reverse micelles, as the nanoparticles template the peripheral arrangement of the cationic ferrocene amphiphiles, counterions and water molecules around their surfaces.
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Affiliation(s)
- J Liu
- Center for Supramolecular Science and Department of Chemistry, University of Miami, Coral Gables, Florida 33124-0431, USA
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45
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Kano K, Hasegawa H. Chiral recognition of helical metal complexes by modified cyclodextrins. J Am Chem Soc 2001; 123:10616-27. [PMID: 11673993 DOI: 10.1021/ja0112644] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Chirality of metal complexes M(phen)3(n+) (M = Ru(II), Rh(III), Fe(II), Co(II), and Zn(II), and phen = 1,10-phenanthroline) is recognized by heptakis(6-carboxymethylthio-6-deoxy)-beta-cyclodextrin heptaanion (per-CO2(-)-beta-CD) and hexakis(2,3,6-tri-O-methyl)-alpha-cyclodextrin (TMe-alpha-CD) in D2O. The binding constant (K) for the Delta-Ru(phen)3(2+) complex of per-CO2(-)-beta-CD (K = 1250 M(-1)) in 0.067 M phosphate buffer at pD 7.0 is approximately 2 times larger than that for the Lambda-isomer (590 M(-1)). Definite effects of inorganic salts on stability of the complexes indicate a large contribution of Coulomb interactions to complexation. The fact that hydrophilic Ru(bpy)3(2+) (bpy = 2,2'-bipyridine) does not form a complex with per-CO2(-)-beta-CD suggests the importance of inclusion of the guest molecule into the host cavity for forming a stable ion-association complex. The positive entropy change for complexation of Ru(phen)3(2+) with per-CO2(-)-beta-CD shows that dehydration from both the host and the guest occurs upon complexation. Similar results were obtained with trivalent Rh(phen)3(3+) cation. Pfeiffer effects were observed in complexation of racemic Fe(phen)3(2+), Co(phen)3(2+), and Zn(phen)3(2+) with per-CO2(-)-beta-CD with enriched Delta-isomers. Native cyclodextrins such as alpha-, beta-, and gamma-cyclodextrins as well as heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin do not interact with Ru(bpy)3(2+). However, hexakis(2,3,6-tri-O-methyl)-alpha-cyclodextrin (TMe-alpha-CD) interacts with Ru(phen)3(2+) and Ru(bpy)3(2+) and discriminates between the enantiomers of these metal complexes. The K values for the Delta- and Lambda-Ru(phen)3(2+) ions are 54 and 108 M(-1), respectively. Complexation of the Delta- and Lambda-isomers of Ru(phen)3(2+) with TMe-alpha-CD is accompanied by negative entropy changes, suggesting that cationic Ru(phen)3(2+) is shallowly included into the cavity of the neutral host through van der Waals interactions. The Delta-enantiomer, having a right-handed helix configuration, fits the primary OH group side of per-CO2(-)-beta-CD (SCH2CO2(-) side) well, while the Lambda-enantiomer, having a left-handed helix configuration, is preferably bound to the secondary OH group side of TMe-alpha-CD. The asymmetrically twisted shape of a host cavity seems to be the origin of chiral recognition by cyclodextrin.
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Affiliation(s)
- K Kano
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
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46
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Nishikawa S, Ugawa T. Dynamic Interaction between Cyclodextrin and Nonelectrolytes in Aqueous Solutions by Ultrasonic Relaxation Method. J Phys Chem A 2000. [DOI: 10.1021/jp993677l] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sadakatsu Nishikawa
- Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Saga 840-8502, Japan
| | - Takaho Ugawa
- Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Saga 840-8502, Japan
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47
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Cervero M, Mendicuti F. Inclusion Complexes of Dimethyl 2,6-Naphthalenedicarboxylate with α- and β-Cyclodextrins in Aqueous Medium: Thermodynamics and Molecular Mechanics Studies. J Phys Chem B 2000. [DOI: 10.1021/jp993418w] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marta Cervero
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
| | - Francisco Mendicuti
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
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48
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Okada M, Kawaguchi Y, Okumura H, Kamachi M, Harada A. Complex formation of cyclodextrins with poly(propylene glycol) derivatives. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1099-0518(200012)38:1+<4839::aid-pola220>3.0.co;2-e] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Affiliation(s)
- Mikhail V. Rekharsky
- Inoue Photochirogenesis Project, ERATO, JST, 4-6-3 Kamishinden, Toyonaka 565-0085, Japan, and Department of Molecular Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
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50
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Nishikawa S, Yokoo N, Kuramoto N. Kinetic Study for Complexation between α-Cyclodextrin and Alcohols in Water by the Ultrasonic Relaxation Method. J Phys Chem B 1998. [DOI: 10.1021/jp980599d] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sadakatsu Nishikawa
- Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Saga 840, Japan
| | - Naoko Yokoo
- Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Saga 840, Japan
| | - Naoki Kuramoto
- Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Saga 840, Japan
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