1
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Muñoz J. Rational Design of Stimuli-Responsive Inorganic 2D Materials via Molecular Engineering: Toward Molecule-Programmable Nanoelectronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2305546. [PMID: 37906953 DOI: 10.1002/adma.202305546] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 10/10/2023] [Indexed: 11/02/2023]
Abstract
The ability of electronic devices to act as switches makes digital information processing possible. Succeeding graphene, emerging inorganic 2D materials (i2DMs) have been identified as alternative 2D materials to harbor a variety of active molecular components to move the current silicon-based semiconductor technology forward to a post-Moore era focused on molecule-based information processing components. In this regard, i2DMs benefits are not only for their prominent physiochemical properties (e.g., the existence of bandgap), but also for their high surface-to-volume ratio rich in reactive sites. Nonetheless, since this field is still in an early stage, having knowledge of both i) the different strategies for molecularly functionalizing the current library of i2DMs, and ii) the different types of active molecular components is a sine qua non condition for a rational design of stimuli-responsive i2DMs capable of performing logical operations at the molecular level. Consequently, this Review provides a comprehensive tutorial for covalently anchoring ad hoc molecular components-as active units triggered by different external inputs-onto pivotal i2DMs to assess their role in the expanding field of molecule-programmable nanoelectronics for electrically monitoring bistable molecular switches. Limitations, challenges, and future perspectives of this emerging field which crosses materials chemistry with computation are critically discussed.
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Affiliation(s)
- Jose Muñoz
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, 08193, Spain
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2
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Sarraute S, Biesse-Martin AS, Devemy J, Dequidt A, Bonal C, Malfreyt P. Investigation of the Complexation between 4-Aminoazobenzene and Cucurbit[7]uril through a Combined Spectroscopic, Nuclear Magnetic Resonance, and Molecular Simulation Studies. ACS OMEGA 2022; 7:25013-25021. [PMID: 35910107 PMCID: PMC9330255 DOI: 10.1021/acsomega.2c00499] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 06/30/2022] [Indexed: 06/02/2023]
Abstract
Cucurbiturils are well known for their ability to form supramolecular systems with ultrahigh affinities binding. Inclusion complex between 4-aminoazobenzene and cucurbit[7]uril has been investigated in aqueous solution by ultraviolet (UV)-spectroscopy, 1H NMR, and molecular simulations. 4-aminoazobenzene shows high affinity in acidic solutions while no association was detected in neutral solutions. The thermodynamic properties of complex formation are investigated using both UV spectroscopy and nuclear magnetic resonance (NMR) measurements. Our results highlight that the high binding constant between CB7 and 4AA (log K = 4.9) is the result of a large negative change in Δr H° (-19 kJ/mol) and a small positive change in TΔr S° (9 kJ/mol). The analysis of the experimental data lead to hypothesis on the structure of the complex. We have used molecular dynamics simulation to interpret experiments. Interestingly, the cis-trans isomerization of aminoazobenzene is considered. All the results are discussed and compared with those previously obtained with other host molecules.
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3
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Narafu S, Takashima Y, Niwa O, Yajima T, Ueno Y. Electrochemical analysis of ferrocene in bicontinuous microemulsions using β- cyclodextrin modified monolayer graphene electrodes. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Liubimtsev N, Kösterke T, Che Y, Appelhans D, Gaitzsch J, Voit B. Redox-sensitive ferrocene functionalised double cross-linked supramolecular hydrogels. Polym Chem 2022. [DOI: 10.1039/d1py01211h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Responsive double cross-linked hydrogels have proven to be a powerful approach to create smart polymer networks but unfold even greater potential if combined with supramolecular chemistry.
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Affiliation(s)
- Nikolai Liubimtsev
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, Faculty of Chemistry and Food Chemistry, Organic Chemistry of Polymers, 01069 Dresden, Germany
| | - Tom Kösterke
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, Faculty of Chemistry and Food Chemistry, Organic Chemistry of Polymers, 01069 Dresden, Germany
| | - Yunjiao Che
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
| | - Dietmar Appelhans
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
| | - Jens Gaitzsch
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
| | - Brigitte Voit
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, Faculty of Chemistry and Food Chemistry, Organic Chemistry of Polymers, 01069 Dresden, Germany
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5
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Rodin M, Li J, Kuckling D. Dually cross-linked single networks: structures and applications. Chem Soc Rev 2021; 50:8147-8177. [PMID: 34059857 DOI: 10.1039/d0cs01585g] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cross-linked polymers have attracted an immense attention over the years, however, there are many flaws of these systems, e.g. softness and brittleness; such materials possess non-adjustable properties and cannot recover from damage and thus are limited in their practical applications. Supramolecular chemistry offers a variety of dynamic interactions that when integrated into polymeric gels endow the systems with reversibility and responsiveness to external stimuli. A combination of different cross-links in a single gel could be the key to tackle these drawbacks, since covalent or chemical cross-linking serve to maintain the permanent shape of the material and to improve overall mechanical performance, whereas non-covalent cross-links impart dynamicity, reversibility, stimuli-responsiveness and often toughness to the material. In the present review we sought to give a comprehensive overview of the progress in design strategies of different types of dually cross-linked single gels made by researchers over the past decade as well as the successful implementations of these advances in many demanding fields where versatile multifunctional materials are required, such as tissue engineering, drug delivery, self-healing and adhesive systems, sensors as well as shape memory materials and actuators.
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Affiliation(s)
- Maksim Rodin
- Department of Chemistry, Paderborn University, Warburger Str. 100, 33098 Paderborn, Germany.
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6
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Buten C, Kortekaas L, Ravoo BJ. Design of Active Interfaces Using Responsive Molecular Components. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1904957. [PMID: 31573115 DOI: 10.1002/adma.201904957] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/07/2019] [Indexed: 06/10/2023]
Abstract
Responsive interfaces are interfaces that show a defined and reversible change in physical properties in response to external stimuli. Typically, responsive interfaces result from the immobilization of responsive molecular components at the interface that translate a nanoscale signal into a macroscopic effect. Responsive interfaces can also be obtained if the topology of the interface can be reversibly changed using an external stimulus. As the surface of any material is its connection to the environment, responsive interfaces provide opportunities for interactive materials which are not only able to change properties upon demand, but also sense their environment and act autonomously. The application of responsive molecular components at interfaces, however, requires chemical and physical compatibility with the material surface of interest, posing a challenge not least in the retention of the responsive functionality. The state of the art in "active" interfaces which display responsive wettability, permeability, or adhesion is discussed, with a particular emphasis on microscale and nanoscale patterning since patterned interfaces can give rise to unique material properties. Finally, perspectives in the development of responsive interfaces, as well as promising approaches for bypassing the most prominent challenges are discussed.
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Affiliation(s)
- Christoph Buten
- Center for Soft Nanoscience and Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149, Münster, Germany
| | - Luuk Kortekaas
- Center for Soft Nanoscience and Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149, Münster, Germany
| | - Bart Jan Ravoo
- Center for Soft Nanoscience and Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149, Münster, Germany
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7
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Facciotti C, Saggiomo V, van Hurne S, Bunschoten A, Kaup R, Velders AH. Oxidant-responsive ferrocene-based cyclodextrin complex coacervate core micelles. Supramol Chem 2019. [DOI: 10.1080/10610278.2019.1685094] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Camilla Facciotti
- Laboratory of BioNanoTechnology, Wageningen University & Research, Wageningen, The Netherlands
| | - Vittorio Saggiomo
- Laboratory of BioNanoTechnology, Wageningen University & Research, Wageningen, The Netherlands
| | - Simon van Hurne
- Laboratory of BioNanoTechnology, Wageningen University & Research, Wageningen, The Netherlands
| | - Anton Bunschoten
- Laboratory of BioNanoTechnology, Wageningen University & Research, Wageningen, The Netherlands
| | - Rebecca Kaup
- Laboratory of BioNanoTechnology, Wageningen University & Research, Wageningen, The Netherlands
| | - Aldrik H. Velders
- Laboratory of BioNanoTechnology, Wageningen University & Research, Wageningen, The Netherlands
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Thiabaud G, Harden-Bull L, Ghang YJ, Sen S, Chi X, Bachman JL, Lynch VM, Siddik ZH, Sessler JL. Platinum(IV)-Ferrocene Conjugates and Their Cyclodextrin Host-Guest Complexes. Inorg Chem 2019; 58:7886-7894. [PMID: 31125214 DOI: 10.1021/acs.inorgchem.9b00570] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Reported here are new platinum(IV) (Pt(IV)) complexes bearing ferrocene (Fc) moieties. These systems differ from one another only by the nature of the functional group (ester vs amide) connecting the linker to the Fc subunits. This minor structural variation (one atom difference) leads to major differences in solubility, stability, and antiproliferative activity against lung (A549) cancer cells. The host-guest chemistry of these complexes was investigated in an aqueous medium in the presence of β-cyclodextrins (β-CD), either free or in the form of a covalently linked Fc-Pt-β-CD hybrid. An inclusion complex between Fc and β-CD is formed in aqueous media, presumably as a result of hydrophobic interactions involving the Fc and the inner β-CD cavity. Consequently, it proved possible to use a β-CD-based strategy to purify the Pt-Fc conjugates in this study under aqueous conditions (by means of C18 silica gel columns). The use of a β-CD adjuvant also allowed dimethyl sulfoxide (DMSO) to be avoided as an organic cosolvent in cell studies. The amide version reported here (2) proved to be more soluble, more stable, and more active than the ester analogue (11) in A549 cells. The use of a β-CD functionalized with a fluorescent probe allowed intracellular Pt-Fc localization to be visualized by confocal fluorescence microscopy.
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Affiliation(s)
- Grégory Thiabaud
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
| | - Louis Harden-Bull
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
| | - Yoo-Jin Ghang
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
| | - Sajal Sen
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
| | - Xiaodong Chi
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
| | - James L Bachman
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
| | - Vincent M Lynch
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
| | - Zahid H Siddik
- The University of Texas M. D. Anderson Cancer Center , 1515 Holcombe Boulevard, Unit Number 1950 , Houston , Texas 77030 , United States
| | - Jonathan L Sessler
- Department of Chemistry , The University of Texas at Austin , 100 E. 24th Street , Austin , Texas 78712 , United States
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9
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Gonzalez J, Martinez-Ortiz F, Torralba E, Molina A. Kinetic Influence of Surface Charge Transfer Reactions Preceded by Non-Electrochemical Processes on the Response in Cyclic Voltammetry. ChemElectroChem 2018. [DOI: 10.1002/celc.201801275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Joaquin Gonzalez
- Departamento de Química Física Facultad de Química Regional Campus of International Excellence “Campus Mare Nostrum”; Universidad de Murcia; 30100 Murcia Spain
| | - Francisco Martinez-Ortiz
- Departamento de Química Física Facultad de Química Regional Campus of International Excellence “Campus Mare Nostrum”; Universidad de Murcia; 30100 Murcia Spain
| | | | - Angela Molina
- Departamento de Química Física Facultad de Química Regional Campus of International Excellence “Campus Mare Nostrum”; Universidad de Murcia; 30100 Murcia Spain
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10
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Cheng HF, d'Aquino AI, Barroso-Flores J, Mirkin CA. A Redox-Switchable, Allosteric Coordination Complex. J Am Chem Soc 2018; 140:14590-14594. [PMID: 30365302 DOI: 10.1021/jacs.8b09321] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A redox-regulated molecular tweezer complex was synthesized via the weak-link approach. The PtII complex features a redox-switchable hemilabile ligand (RHL) functionalized with a ferrocenyl moiety, whose oxidation state modulates the opening of a specific coordination site. Allosteric regulation by redox agents gives reversible access to two distinct structural states-a fully closed state and a semi-open state-whose interconversion was studied via multinuclear NMR spectroscopy, cyclic voltammetry, and UV-vis-NIR spectroscopy. Two structures in this four-state system were further characterized via SCXRD, while the others were modeled through DFT calculations. This fully reversible, RHL-based system defines an unusual level of electrochemical control over the occupancy of a specific coordination site, thereby providing access to four distinct coordination states within a single system, each defined and differentiated by structure and oxidation state.
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Affiliation(s)
- Ho Fung Cheng
- Department of Chemistry and International Institute for Nanotechnology , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3113 , United States
| | - Andrea I d'Aquino
- Department of Chemistry and International Institute for Nanotechnology , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3113 , United States
| | - Joaquín Barroso-Flores
- Centro Conjunto de Investigación en Química Sustentable, UAEM-UNAM , Carretera Toluca-Atlacomulco Km 14.5 , Personal de la UNAM, Unidad San Cayetano, Toluca , Estado de México C.P. 50200 , Mexico
| | - Chad A Mirkin
- Department of Chemistry and International Institute for Nanotechnology , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3113 , United States
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11
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Spectroscopic insight into supramolecular assemblies of boric acid derivatives and β-cyclodextrin. Carbohydr Polym 2018; 198:294-301. [DOI: 10.1016/j.carbpol.2018.06.085] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/19/2018] [Accepted: 06/19/2018] [Indexed: 12/20/2022]
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12
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Wang B, Jia AQ, Yang HM, Liu JL, Zhang QF. Encapsulation of ferrocenes by hydrogen-bonded pyrogallol[4]arene dimers. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2018. [DOI: 10.1515/znb-2018-0083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
AbstractThe treatment ofC-iso-butylpyrogallarene (PgC4) orC-ethylpyrogallarene (PgC2) with ferrocene (FcH) in a 2:1 molar ratio under different reaction conditions afforded the host–guest compounds FcH@(PgC4)2·CH3OH·3H2O (1) and FcH@(PgC2)2·3EtOH·2H2O (2), respectively. Complexes1and2are both pyrogallarene dimers providing capsule-type voids. Single crystal X-ray crystallography was used to investigate the role of hydrogen bonding networks in the assembly of the two host–guest systems.
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Affiliation(s)
- Bei Wang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology , Ma’anshan, Anhui 243002 , P.R. China
| | - Ai-Quan Jia
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology , Ma’anshan, Anhui 243002 , P.R. China
| | - Hong-Mei Yang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology , Ma’anshan, Anhui 243002 , P.R. China
| | - Jing-Long Liu
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology , Ma’anshan, Anhui 243002 , P.R. China
| | - Qian-Feng Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology , Ma’anshan, Anhui 243002 , P.R. China
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13
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Lee SH, Lee SS. Electrochemical Quantitative Analysis of Nucleic Acids Using β-Cyclodextrin Modified Gold Electrode. ELECTROANAL 2017. [DOI: 10.1002/elan.201600686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sun Hyeok Lee
- Department of Pharmaceutical Engineering; Soonchunhyang University; Asan-Si 31538 Republic of Korea
| | - Soo Suk Lee
- Department of Pharmaceutical Engineering; Soonchunhyang University; Asan-Si 31538 Republic of Korea
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14
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Degardin M, Thakar D, Claron M, Richter RP, Coche-Guérente L, Boturyn D. Development of a selective cell capture and release assay: impact of clustered RGD ligands. J Mater Chem B 2017; 5:4745-4753. [DOI: 10.1039/c7tb00630f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Clustered RGD compounds improve the selective capture and release of cells that express αvβ3 integrin.
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Affiliation(s)
- M. Degardin
- Univ. Grenoble-Alpes
- CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
| | - D. Thakar
- Univ. Grenoble-Alpes
- CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
| | - M. Claron
- Univ. Grenoble-Alpes
- CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
| | - R. P. Richter
- University of Leeds
- School of Biomedical Sciences and School of Physics and Astronomy
- Leeds
- UK
- CIC biomaGUNE
| | | | - D. Boturyn
- Univ. Grenoble-Alpes
- CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
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15
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Gomes AC, Magalhães CIR, Oliveira TSM, Lopes AD, Gonçalves IS, Pillinger M. Solid-state study of the structure and host–guest chemistry of cucurbituril-ferrocene inclusion complexes. Dalton Trans 2016; 45:17042-17052. [DOI: 10.1039/c6dt02811j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Solid-state host–guest interactions have been investigated for cucurbit[n]uril-ferrocene inclusion compounds (n = 7, 8) prepared via a microwave-assisted hydrothermal approach.
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Affiliation(s)
- Ana C. Gomes
- Department of Chemistry
- CICECO - Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Clara I. R. Magalhães
- Department of Chemistry
- CICECO - Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Tânia S. M. Oliveira
- Faculty of Science and Technology
- CIQA
- University of the Algarve
- 8005-136 Faro
- Portugal
| | - André D. Lopes
- Faculty of Science and Technology
- CIQA
- University of the Algarve
- 8005-136 Faro
- Portugal
| | - Isabel S. Gonçalves
- Department of Chemistry
- CICECO - Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Martyn Pillinger
- Department of Chemistry
- CICECO - Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
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16
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Effects of Unequal Diffusion Coefficients and Coupled Chemical Equilibria on Square Wave Voltammetry at Disc and Hemispherical Microelectrodes. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.07.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Molina A, Olmos J, Laborda E. Reverse Pulse Voltammetry at Spherical and Disc Microelectrodes: Characterization of Homogeneous Chemical Equilibria and Their Impact on the Species Diffusivities. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.03.199] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Abstract
Specific targeting is common in biology and is a key challenge in nanomedicine. It was recently demonstrated that multivalent probes can selectively target surfaces with a defined density of surface binding sites. Here we show, using a combination of experiments and simulations on multivalent polymers, that such "superselective" binding can be tuned through the design of the multivalent probe, to target a desired density of binding sites. We develop an analytical model that provides simple yet quantitative predictions to tune the polymer's superselective binding properties by its molecular characteristics such as size, valency, and affinity. This work opens up a route toward the rational design of multivalent probes with defined superselective targeting properties for practical applications, and provides mechanistic insight into the regulation of multivalent interactions in biology. To illustrate this, we show how the superselective targeting of the extracellular matrix polysaccharide hyaluronan to its main cell surface receptor CD44 is controlled by the affinity of individual CD44-hyaluronan interactions.
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19
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Differential double pulse voltammetry at spherical microelectrodes for the characterization of the square mechanism. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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20
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Laborda E, Olmos JM, Martínez-Ortiz F, Molina A. Voltammetric speciation studies of systems where the species diffusivities differ significantly. J Solid State Electrochem 2014. [DOI: 10.1007/s10008-014-2620-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Filippini G, Bonal C, Malfreyt P. How does the dehydration change the host-guest association under homogeneous and heterogeneous conditions? Phys Chem Chem Phys 2014; 16:8667-74. [PMID: 24676343 DOI: 10.1039/c4cp00108g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, the thermodynamic properties of association of some inorganic ions (ClO4(-) and SO4(2-)) with β-cyclodextrins (β-CD) in aqueous solution are determined under both free β-CD and surface confined β-CD conditions using atomistic simulations. The potential of mean force (PMF) is calculated as a function of the environment and the thermodynamic properties of association are deduced by integrating the free energy profiles. No inclusion complex between SO4(2-) and β-CD is detected. Nevertheless, the PMF curve obtained for gold-confined CD seems to evidence a small minimum at a larger separation distance that shows specific interactions such as hydrogen bonding outside the cavity. As concerns ClO4(-), our simulations reveal the formation of an inclusion complex with free β-CD in perfect agreement with the available experimental results. Nevertheless, we do not detect any formation of the host-guest inclusion complex under heterogeneous conditions. Finally, the differences observed as a function of the anions are interpreted through an atomistic description. The general trend of weaker complex stabilities with the increasing free energy of hydration of the anions is found in homogeneous systems.
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Affiliation(s)
- G Filippini
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, ICCF, CNRS, UMR 6296, BP 10448, F-63000 Clermont-Ferrand, France.
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22
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Dubacheva GV, Curk T, Mognetti BM, Auzély-Velty R, Frenkel D, Richter RP. Superselective targeting using multivalent polymers. J Am Chem Soc 2014; 136:1722-5. [PMID: 24400591 PMCID: PMC3919174 DOI: 10.1021/ja411138s] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
![]()
Despite
their importance for material and life sciences, multivalent
interactions between polymers and surfaces remain poorly understood.
Combining recent achievements of synthetic chemistry and surface characterization,
we have developed a well-defined and highly specific model system
based on host/guest interactions. We use this model to study the binding
of hyaluronic acid functionalized with host molecules to tunable surfaces
displaying different densities of guest molecules. Remarkably, we
find that the surface density of bound polymer increases faster than
linearly with the surface density of binding sites. Based on predictions
from a simple analytical model, we propose that this superselective
behavior arises from a combination of enthalpic and entropic effects
upon binding of nanoobjects to surfaces, accentuated by the ability
of polymer chains to interpenetrate.
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Affiliation(s)
- Galina V Dubacheva
- Biosurfaces Unit, CIC biomaGUNE , Paseo Miramon 182, 20009 Donostia-San Sebastian, Spain
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Hashidzume A, Yamaguchi H, Harada A. Cyclodextrin-based molecular machines. Top Curr Chem (Cham) 2014; 354:71-110. [PMID: 24789535 DOI: 10.1007/128_2014_547] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This chapter overviews molecular machines based on cyclodextrins (CDs). The categories of CD-based molecular machines, external stimuli for CD-based molecular machines, and typical examples of CD-based molecular machines are briefly described.
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Affiliation(s)
- Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan
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In situ spectroelectrochemistry, electrosynthesis and growth rates of conducting polypyrrole and poly N-methylpyrrole on gold and indium tin oxide glass modified by thiolated α-cyclodextrin self-assembled monolayer’s (SAMs). J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2012.11.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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25
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Mossine AV, Kumari H, Fowler DA, Shih A, Kline SR, Barnes CL, Atwood JL. Ferrocene Species Included within a Pyrogallol[4]arene Tube. Chemistry 2012; 18:10258-60. [DOI: 10.1002/chem.201200263] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 04/13/2012] [Indexed: 11/09/2022]
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27
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Filippini G, Bonal C, Malfreyt P. Why is the association of supramolecular assemblies different under homogeneous and heterogeneous conditions? Phys Chem Chem Phys 2012; 14:10122-4. [DOI: 10.1039/c2cp41661a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mallon CT, Forster RJ, Keyes TE. Mechanism and release rates of surface confined cyclodextrin guests. Analyst 2011; 136:5051-7. [PMID: 21975325 DOI: 10.1039/c1an15650k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dissociation of a cobalt bisdiphenylterpyridine, [Co(biptpy)(2)](2+), guest at mixed (γ-CD-(py)(2))-alkanethiol layers (where γ-CD-(py)(2) is di-6(A), 6(B)- deoxy-6-(4-pyridylmethyl)amino- γ-cyclodextrin) formed on platinum electrodes is reported. Cyclic voltammetry (CV) shows reversible one-electron surface confined waves consistent with the Co(2/3+) couple bound at the interface. The quantity of [Co(biptpy)(2)](3+) reduced is found to be dependent on the scan rate employed, with greater amounts at higher scan rates. This behavior is in contrast to the CD guest ferrocene, which upon oxidation to the ferrocenium ion shows little charge associated with reduction even at elevated scan rates. Chronocoulometry was conducted to systematically vary the time spent oxidizing [Co(biptpy)(2)](2+) and to measure the resulting charge associated with the reduction of [Co(biptpy)(2)](3+). It is determined experimentally that as the pulse width increases, i.e. greater time spent in the oxidizing region, the amount of charge needed to reduce [Co(biptpy)(2)](3+) decreases dramatically. This decrease, along with the CV data, suggests strongly that the [Co(biptpy)(2)](3+) dissociates from the cavity. Significantly, this dissociation of the interfacial host-guest complex occurs on a much longer timescale (the order of seconds) compared to the oxidation of [Co(biptpy)(2)](2+) to [Co(biptpy)(2)](3+), which has been measured using high speed chronoamperometry to occur with a rate contant, k(0), of approximately 10(3) s(-1). The comparison of the timescale for dissociation of the interfacial complex and for electron transfer signifies that the electron transfer step occurs before dissociation, i.e. dissociation via an EC mechanism. The dissociation mechanism of [Co(biptpy)(2)](3+) is contrasted with that of the ferrocene/ferrocenium couple.
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Affiliation(s)
- Colm T Mallon
- National Center for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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Macías-Ruvalcaba NA, Aguilar-Martínez M, Pérez-Casas S, Hernández S, Mejía E, Evans DH. Extension of electrochemical methods of study of inclusion complexes to the case where the guest molecule undergoes a multielectron, multiproton electrode reaction: Study of phenolic acids forming inclusion complexes with α- and β-cyclodextrins. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.07.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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30
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Yamamoto T, Oi W, Hashidzume A, Harada A. Complex Formation of Cyclodextrins with a Dumbbell Molecule Bearing Two Ferrocene Moieties at the Ends. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20110142] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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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: 8] [Impact Index Per Article: 0.6] [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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32
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Synthesis, UV/vis spectra and electrochemical characterisation of arylthio and styryl substituted ferrocenes. OPEN CHEM 2011. [DOI: 10.2478/s11532-011-0040-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractTwo series of substituted ferrocenes were synthesised using either the Horner-Wadsworth-Emmons reaction or monolithiation of ferrocene. The series consist of arylthio- and styryl-ferrocenes with different substituents in the para position of the aryl rings of the systems. The electronic communication was investigated by comparing the substituent effects in absorption spectroscopy and in cyclic voltammetry. A small substituent effect was found in the electronic transitions of the styryl substituted ferrocenes. The oxidation of the ferrocene derivatives showed clear substituent effects as illustrated by the linear Hammett plots. The effect was shown to be an order of magnitude larger in the arylthio-systems than in the styryl systems. It is suggested that the reason behind the large effect is a direct sulfur-iron orbital overlap.
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Kolivoška V, Gál M, Hromadová M, Valášek M, Pospíšil L. Correlation of the formation constant of ferrocene–cyclodextrin complexes with dielectric properties of the aqueous DMSO solution. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.01.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Kang Y, Yuan J, Yan Q, Zheng L, Zhou L. β-cyclodextrin-based polymeric nano-receptor: the self-assembly of cyclodextrin-appended comb-copolymer. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.1863] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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35
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Silveira GQ, Vargas MD, Ronconi CM. Nanoreservoir operated by ferrocenyl linker oxidation with molecular oxygen. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03738a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Braga SS, GonÇalves IS, Ribeiro-Claro P, Lopes AD, Pillinger M, Teixeira-Dias JJ, Rocha J, Romão CC. Encapsulation of Cyano(cyclopentadienyl) Complexes of Iron with β-cyclodextrin. Supramol Chem 2010. [DOI: 10.1080/10610270290029308] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Susana S. Braga
- a Department of Chemistry , University of Aveiro , Campus de Santiago, Aveiro , 3810-193 , Portugal
| | - Isabel S. GonÇalves
- a Department of Chemistry , University of Aveiro , Campus de Santiago, Aveiro , 3810-193 , Portugal
| | - Paulo Ribeiro-Claro
- a Department of Chemistry , University of Aveiro , Campus de Santiago, Aveiro , 3810-193 , Portugal
- b Química-Física Molecular, Faculdade de Ciências e Tecnologia , Universidade de Coimbra , Coimbra , 3004-353 , Portugal
| | - André D. Lopes
- a Department of Chemistry , University of Aveiro , Campus de Santiago, Aveiro , 3810-193 , Portugal
| | - Martyn Pillinger
- a Department of Chemistry , University of Aveiro , Campus de Santiago, Aveiro , 3810-193 , Portugal
| | - José J.C. Teixeira-Dias
- a Department of Chemistry , University of Aveiro , Campus de Santiago, Aveiro , 3810-193 , Portugal
| | - João Rocha
- a Department of Chemistry , University of Aveiro , Campus de Santiago, Aveiro , 3810-193 , Portugal
| | - Carlos C. Romão
- c Quinta do Marquês , Instituto de Tecnologia Química e Biológica , EAN Apt 127, Oeiras , 2781-901 , Portugal
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Dubacheva GV, Van der Heyden A, Dumy P, Kaftan O, Auzély-Velty R, Coche-Guerente L, Labbé P. Electrochemically controlled adsorption of Fc-functionalized polymers on beta-CD-modified self-assembled monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:13976-13986. [PMID: 20684518 DOI: 10.1021/la102026h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This work presents an in situ study of the adsorption/desorption behavior of ferrocene(Fc)-functionalized linear polymers on a gold surface covered with beta-cyclodextrin(beta-CD)-modified self-assembled monolayers (SAMs). The characterization of binary SAMs obtained with HS-(CH(2))(11)-EG(6)-N(3) and HS-(CH(2))(11)-EG(4)-OH (EG, ethylene glycol) was performed using a quartz crystal microbalance with dissipation monitoring (QCM-D), cyclic voltammetry, and contact angle measurements. The functionalization of SAMs with beta-CD was made via the "click" reaction between the beta-CD monoalkyne derivative and azide groups exhibited by SAMs. The formation of the host-guest complex between SAM-beta-CD and Fc-derivatized polymers (chitosan (CHI) and poly(allylamine hydrochloride) (PAH)) was studied by QCM-D. The viscoelastic model of Voinova was used to fit QCM-D curves recorded during the adsorption and electrochemically controlled desorption of CHI-Fc and PAH-Fc on SAM-beta-CD. Using QCM-D coupled to cyclic voltammetry, we demonstrated that CHI-Fc and PAH-Fc can be successfully deposited on a SAM-beta-CD-coated gold surface forming a stable multivalent inclusion complex between Fc moieties of polymer and beta-CD cavities of SAM. We also showed that all specifically attached polymer chains can be detached from the SAM-beta-CD-coated gold surface by applying an electric field.
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Affiliation(s)
- Galina V Dubacheva
- Département de Chimie Moléculaire, UMR CNRS-UJF 5250, ICMG FR-2607, Université Joseph Fourier, BP 53, 38041 Grenoble, Cedex 9, France
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38
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Song JP, Guo YJ, Shuang SM, Dong C. Study on the inclusion interaction of ethyl violet with cyclodextrins by MWNTs/Nafion modified glassy carbon electrode. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9811-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Zhang H, Shen J, Liu Z, Hao A, Bai Y, An W. Multi-responsive cyclodextrin vesicles assembled by ‘supramolecular bola-amphiphiles’. Supramol Chem 2010. [DOI: 10.1080/10610270903469765] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Huacheng Zhang
- a School of Chemistry and Chemical Engineering and Key Laboratory of Colloid and Interface Chemistry , Ministry of Education, Shandong University , Jinan, 250100, P.R. China
| | - Jian Shen
- a School of Chemistry and Chemical Engineering and Key Laboratory of Colloid and Interface Chemistry , Ministry of Education, Shandong University , Jinan, 250100, P.R. China
| | - Zhaona Liu
- a School of Chemistry and Chemical Engineering and Key Laboratory of Colloid and Interface Chemistry , Ministry of Education, Shandong University , Jinan, 250100, P.R. China
| | - Aiyou Hao
- a School of Chemistry and Chemical Engineering and Key Laboratory of Colloid and Interface Chemistry , Ministry of Education, Shandong University , Jinan, 250100, P.R. China
| | - Yan Bai
- a School of Chemistry and Chemical Engineering and Key Laboratory of Colloid and Interface Chemistry , Ministry of Education, Shandong University , Jinan, 250100, P.R. China
| | - Wei An
- a School of Chemistry and Chemical Engineering and Key Laboratory of Colloid and Interface Chemistry , Ministry of Education, Shandong University , Jinan, 250100, P.R. China
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Redox-responsive vesicles prepared from supramolecular cyclodextrin amphiphiles. Carbohydr Res 2010; 345:87-96. [PMID: 19926079 DOI: 10.1016/j.carres.2009.10.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Revised: 10/17/2009] [Accepted: 10/28/2009] [Indexed: 11/20/2022]
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42
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Gadde S, Batchelor EK, Kaifer AE. Electrochemistry of Redox Active Centres Encapsulated by Non-Covalent Methods. Aust J Chem 2010. [DOI: 10.1071/ch09390] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This manuscript presents a summary of recent research work on the electrochemical behaviour of redox active guests fully or almost fully encapsulated by suitable molecular receptors or molecular capsules. From the standpoint of their voltammetric behaviour the cyclodextrins have been shown to be very dynamic hosts, which hamper the observation of direct electron transfer to/from their inclusion complexes. Therefore, this Review is essentially concerned with research work on cucurbituril and cavitand-type hosts, which was mostly done in the author’s laboratory. In general terms, the observed voltammetric behaviour for encapsulated guests covers a wide range of possibilities. Cucurbituril and cavitand-type hosts afford more kinetically stable complexes, whose direct electrochemical behaviour is observable and tends to be kinetically slower than that of the free guests. However, the degree of kinetic attenuation varies over a wide range and, in some cases, challenges our ability to rationalize the data. Clearly, more variation in the host structures and more research work are required to improve our understanding of encapsulation effects on these electron transfer reactions.
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Zhang H, Shen J, Liu Z, Bai Y, An W, Hao A. Controllable vesicles based on unconventional cyclodextrin inclusion complexes. Carbohydr Res 2009; 344:2028-35. [DOI: 10.1016/j.carres.2009.06.030] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 06/12/2009] [Accepted: 06/22/2009] [Indexed: 10/20/2022]
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The Fluorescence Study on the Inducing Orientation of 4-Biphenyl Acetonitrile Adsorbed on Metal Colloids. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2009. [DOI: 10.5012/jkcs.2009.53.4.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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45
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Casas-Solvas J, Ortiz-Salmerón E, Fernández I, García-Fuentes L, Santoyo-González F, Vargas-Berenguel A. Ferrocene-β-Cyclodextrin Conjugates: Synthesis, Supramolecular Behavior, and Use as Electrochemical Sensors. Chemistry 2009; 15:8146-62. [DOI: 10.1002/chem.200900593] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Domi Y, Yoshinaga Y, Shimazu K, Porter MD. Characterization and optimization of mixed thiol-derivatized beta-cyclodextrin/pentanethiol monolayers with high-density guest-accessible cavities. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:8094-8100. [PMID: 19507845 DOI: 10.1021/la900586e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Mixed per-6-thio-beta-cyclodextrin (CD-SH)/pentanethiol (C(5)SH) monolayers were constructed by the sequential immersion of a Au(111) electrode into solutions of CD-SH, ferrocene, and a mixed solution of ferrocene and C(5)SH. Highly compact CD-SH self-assembled monolayers (SAMs) with the surface CD-SH density of 74.0 +/- 6.3 pmol cm(-2) on a true surface area basis were formed in 1 mM CD-SH with the immersion time of more than 48 h as confirmed by reductive desorption voltammetry. Based on the concentration dependence of the adsorption amount, a Langmuir adsorption coefficient was determined to be 1.9 x 10(7) M(-1). Chronocoulometry in a ferrocene solution at the CD-SH SAM and the mixed CD-SH/C(5)SH monolayers revealed the following inclusion properties. (1) All the CD-SH cavities can be used for the inclusion of a guest compound before and after the adsorption of C(5)SH, as shown by the fact that the maximum inclusion amounts of ferrocene, 68.0 +/- 3.4 and 73.0 +/- 2.0 pmol cm(-2) before and after the adsorption of C(5)SH, respectively, were very close to the surface CD-SH density. (2) The association constant between the surface-confined CD-SH and ferrocene (7.6 x 10(4) M(-1)) is greater than the corresponding association constant in solution. (3) The intermolecular vacancies between the adsorbed CD-SH molecules are completely filled with C(5)SH. This ensures that the CD cavities are the only accessible sites for guest compounds and any other reactants.
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Affiliation(s)
- Yasuhiro Domi
- Division of Environmental Materials Science, Hokkaido University, Sapporo, Japan
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Song JP, Guo YJ, Shuang SM, Dong C. Electrochemical behavior of brilliant cresyl violet at multi-wall carbon nanotubes/Nafion modified glassy carbon electrode and its interaction with cyclodextrins. J INCL PHENOM MACRO 2009. [DOI: 10.1007/s10847-009-9543-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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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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49
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Thompson D. In Silico Engineering of Tailored Ink-Binding Ability at Molecular Printboards. Chemphyschem 2007; 8:1684-93. [PMID: 17600798 DOI: 10.1002/cphc.200700288] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Molecular recognition between guest ink molecules and beta-cyclodextrin (beta-CD) cavities at self-assembled monolayers provides a molecular printboard for nanopatterning applications. We recently used molecular dynamics (MD) simulations to describe the specificity of ink-printboard binding and here extend the simulations to include charged cyclodextrin hosts, necessary to broaden the chemistry of molecular printboards and bind charged inks such as the ferrocenium cation. Shifting to high pH, or alternatively grafting a charged sidearm onto beta-CD, created three distinct types of anionic beta-CD cavity and we used electronic structure calculations and MD simulations to measure host-guest charge transfer and binding strengths. We find that steric recognition of uncharged organic molecules is retained at the charged printboards, and that improved guest-host electrostatic contacts can strengthen binding of larger inks while penalising small inks, enhancing the level of discrimination. A prudent choice of complementary host-guest shape and charge states thus provides a means of tuning both ink binding strength and specificity at molecular printboards.
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Affiliation(s)
- Damien Thompson
- Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland.
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50
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A di(thio-1,2-dicyane ethylenylthio)ethane-tethered β-cyclodextrin dimer as a molecular carrier of ferrocene in DMF solution. J INCL PHENOM MACRO 2007. [DOI: 10.1007/s10847-007-9337-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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