1
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Schneider HJ. Distinction and Quantification of Noncovalent Dispersive and Hydrophobic Effects. Molecules 2024; 29:1591. [PMID: 38611870 PMCID: PMC11013637 DOI: 10.3390/molecules29071591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 03/15/2024] [Accepted: 03/19/2024] [Indexed: 04/14/2024] Open
Abstract
The possibilities of comparing computational results of noncovalent interactions with experimental data are discussed, first with respect to intramolecular interactions. For these a variety of experimental data such as heats of formation, crystal sublimation heats, comparison with energy minimized structures, and spectroscopic data are available, but until now largely have not found widespread application. Early force field and QM/MP2 calculations have already shown that the sublimation heats of hydrocarbons can be predicted with an accuracy of ±1%. Intermolecular interactions in solution or the gas phase are always accompanied by difficult to compute entropic contributions, like all associations between molecules. Experimentally observed T∆S values contribute 10% to 80% of the total ∆G, depending on interaction mechanisms within the complexes, such as, e.g., hydrogen bonding and ion pairing. Free energies ∆G derived from equilibrium measurements in solution allow us to define binding increments ∆∆G, which are additive and transferable to a variety of supramolecular complexes. Data from more than 90 equilibrium measurements of porphyrin receptors in water indicate that small alkanes do not bind to the hydrophobic flat surfaces within a measuring limit of ∆G = ±0.5 kJ/mol, and that 20 functions bearing heteroatoms show associations by dispersive interactions with up to ∆G = 8 kJ/mol, roughly as a function of their polarizability. Aromatic systems display size-dependent affinities ∆G as a linear function of the number of π-electrons.
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Affiliation(s)
- Hans-Jörg Schneider
- FR Organische Chemie, Universität des Saarlandes, D 66123 Saarbrücken, Germany
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2
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Park J, Park J, Lee J, Lim C, Lee DW. Size compatibility and concentration dependent supramolecular host-guest interactions at interfaces. Nat Commun 2022; 13:112. [PMID: 35013244 PMCID: PMC8748952 DOI: 10.1038/s41467-021-27659-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 12/03/2021] [Indexed: 11/30/2022] Open
Abstract
The quantification of supramolecular host-guest interactions is important for finely modulating supramolecular systems. Previously, most host-guest interactions quantified using force spectroscopic techniques have been reported in force units. However, accurately evaluating the adhesion energies of host-guest pairs remains challenging. Herein, using a surface forces apparatus, we directly quantify the interaction energies between cyclodextrin (CD)-modified surfaces and ditopic adamantane (DAd) molecules in water as a function of the DAd concentration and the CD cavity size. The adhesion energy of the β-CD-DAd complex drastically increased with increasing DAd concentration and reached saturation. Moreover, the molecular adhesion energy of a single host-guest inclusion complex was evaluated to be ~9.51 kBT. This approach has potential for quantifying fundamental information toward furthering the understanding of supramolecular chemistry and its applications, such as molecular actuators, underwater adhesives, and biosensors, which require precise tuning of specific host-guest interactions.
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Affiliation(s)
- Jintae Park
- School of Energy & Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jinwoo Park
- School of Energy & Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jinhoon Lee
- School of Energy & Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Chanoong Lim
- School of Energy & Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
| | - Dong Woog Lee
- School of Energy & Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
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3
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Alešković M, Roca S, Jozepović R, Bregović N, Šekutor M. Unravelling binding effects in cyclodextrin inclusion complexes with diamondoid ammonium salt guests. NEW J CHEM 2022. [DOI: 10.1039/d2nj00938b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hydrophobic tornado – complexation of diamondoid ammonium salts with cyclodextrins in water.
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Affiliation(s)
- Marija Alešković
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Sunčica Roca
- NMR Center, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Ruža Jozepović
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Nikola Bregović
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10 000 Zagreb, Croatia
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
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4
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Goren E, Avram L, Bar-Shir A. Versatile non-luminescent color palette based on guest exchange dynamics in paramagnetic cavitands. Nat Commun 2021; 12:3072. [PMID: 34031377 PMCID: PMC8144181 DOI: 10.1038/s41467-021-23179-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 04/19/2021] [Indexed: 01/05/2023] Open
Abstract
Multicolor luminescent portrayal of complexed arrays is indispensable for many aspects of science and technology. Nevertheless, challenges such as inaccessible readouts from opaque objects, a limited visible-light spectrum and restricted spectral resolution call for alternative approaches for multicolor representation. Here, we present a strategy for spatial COlor Display by Exploiting Host-guest Dynamics (CODE-HD), comprising a paramagnetic cavitand library and various guests. First, a set of lanthanide-cradled α-cyclodextrins (Ln-CDs) is designed to induce pseudo-contact shifts in the 19F-NMR spectrum of Ln-CD-bound guest. Then, capitalizing on reversible host-guest binding dynamics and using magnetization-transfer 19F-MRI, pseudo-colored maps of complexed arrays are acquired and applied in molecular-steganography scenarios, showing CODE-HD’s ability to generate versatile outputs for information encoding. By exploiting the widely shifted resonances induced by Ln-CDs, the guest versatility and supramolecular systems' reversibility, CODE-HD provides a switchable, polychromatic palette, as an advanced strategy for light-free, multicolor-mapping. Host-guest supramolecular chemistry can be used as a tool to develop multicolor displays. Here, the authors present a system based on lanthanide-cradled cyclodextrins that allows to construct MRI-readable and erasable artificial non-luminescent color palettes.
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Affiliation(s)
- Elad Goren
- Department of Molecular Chemistry and Materials Science, Faculty of Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Liat Avram
- Department of Chemical Research Support, Faculty of Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Amnon Bar-Shir
- Department of Molecular Chemistry and Materials Science, Faculty of Chemistry, Weizmann Institute of Science, Rehovot, Israel.
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5
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Structural Insights into the Host-Guest Complexation between β-Cyclodextrin and Bio-Conjugatable Adamantane Derivatives. Molecules 2021; 26:molecules26092412. [PMID: 33919170 PMCID: PMC8122645 DOI: 10.3390/molecules26092412] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/06/2021] [Accepted: 04/14/2021] [Indexed: 11/20/2022] Open
Abstract
Understanding the host–guest chemistry of α-/β-/γ- cyclodextrins (CDs) and a wide range of organic species are fundamentally attractive, and are finding broad contemporary applications toward developing efficient drug delivery systems. With the widely used β-CD as the host, we herein demonstrate that its inclusion behaviors toward an array of six simple and bio-conjugatable adamantane derivatives, namely, 1-adamantanol (adm-1-OH), 2-adamantanol (adm-2-OH), adamantan-1-amine (adm-1-NH2), 1-adamantanecarboxylic acid (adm-1-COOH), 1,3-adamantanedicarboxylic acid (adm-1,3-diCOOH), and 2-[3-(carboxymethyl)-1-adamantyl]acetic acid (adm-1,3-diCH2COOH), offer inclusion adducts with diverse adamantane-to-CD ratios and spatial guest locations. In all six cases, β-CD crystallizes as a pair supported by face-to-face hydrogen bonding between hydroxyl groups on C2 and C3 and their adjacent equivalents, giving rise to a truncated-cone-shaped cavity to accommodate one, two, or three adamantane derivatives. These inclusion complexes can be terminated as (adm-1-OH)2⊂CD2 (1, 2:2), (adm-2-OH)3⊂CD2 (2, 3:2), (adm-1-NH2)3⊂CD2 (3, 3:2), (adm-1-COOH)2⊂CD2 (4, 2:2), (adm-1,3-diCOOH)⊂CD2 (5, 1:2), and (adm-1,3-diCH2COOH)⊂CD2 (6, 1:2). This work may shed light on the design of nanomedicine with hierarchical structures, mediated by delicate cyclodextrin-based hosts and adamantane-appended drugs as the guests.
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6
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Leko K, Hanževački M, Brkljača Z, Pičuljan K, Ribić R, Požar J. Solvophobically Driven Complexation of Adamantyl Mannoside with β‐Cyclodextrin in Water and Structured Organic Solvents. Chemistry 2020; 26:5208-5219. [DOI: 10.1002/chem.202000282] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Indexed: 01/20/2023]
Affiliation(s)
- Katarina Leko
- Department of ChemistryFaculty of ScienceUniversity of Zagreb Horvatovac 102a 10000 Zagreb Croatia
| | - Marko Hanževački
- Division of Physical ChemistryRuđer Bošković Institute Bijenička 54 10000 Zagreb Croatia
- Department of Chemical and Environmental EngineeringThe University of Nottingham University Park Nottingham NG7 2RD UK
| | - Zlatko Brkljača
- Division of Organic Chemistry and BiochemistryRuđer Bošković Institute Bijenička 54 10000 Zagreb Croatia
| | - Katarina Pičuljan
- Department of ChemistryFaculty of ScienceUniversity of Zagreb Horvatovac 102a 10000 Zagreb Croatia
| | - Rosana Ribić
- Department of ChemistryFaculty of ScienceUniversity of Zagreb Horvatovac 102a 10000 Zagreb Croatia
- University Center VaraždinUniversity North Jurja Križanića 31b 42000 Varaždin Croatia
| | - Josip Požar
- Department of ChemistryFaculty of ScienceUniversity of Zagreb Horvatovac 102a 10000 Zagreb Croatia
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7
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Schönbeck C, Holm R. Exploring the Origins of Enthalpy–Entropy Compensation by Calorimetric Studies of Cyclodextrin Complexes. J Phys Chem B 2019; 123:6686-6693. [DOI: 10.1021/acs.jpcb.9b03393] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Christian Schönbeck
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
| | - René Holm
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
- Drug Product Development, Janssen Research and Development, Johnson & Johnson, Turnhoutseweg 30, 2340 Beerse, Belgium
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8
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Neva T, Carmona T, Benito JM, Przybylski C, Ortiz Mellet C, Mendicuti F, García Fernández JM. Dynamic Control of the Self-Assembling Properties of Cyclodextrins by the Interplay of Aromatic and Host-Guest Interactions. Front Chem 2019; 7:72. [PMID: 30873399 PMCID: PMC6401617 DOI: 10.3389/fchem.2019.00072] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 01/28/2019] [Indexed: 12/17/2022] Open
Abstract
The presence of a doubly-linked naphthylene clip at the O-2I and O-3II positions in the secondary ring of β-cyclodextrin (βCD) derivatives promoted their self-assembly into head-to-head supramolecular dimers in which the aromatic modules act either as cavity extension walls (if the naphthalene moiety is 1,8-disubstituted) or as folding screens that separate the individual βCD units (if 2,3-disubstituted). Dimer architecture is governed by the conformational properties of the monomer constituents, as determined by NMR, fluorescence, circular dichroism, and computational techniques. In a second supramolecular organization level, the topology of the assembly directs host-guest interactions and, reciprocally, guest inclusion impacts the stability of the supramolecular edifice. Thus, inclusion of adamantane carboxylate, a well-known βCD cavity-fitting guest, was found to either preserve the dimeric arrangement, leading to multicomponent species, or elicit dimer disruption. The ensemble of results highlights the potential of the approach to program self-organization and external stimuli responsiveness of CD devices in a controlled manner while keeping full diastereomeric purity.
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Affiliation(s)
- Tania Neva
- Instituto de Investigaciones Químicas (IIQ), CSIC - University of Sevilla, Sevilla, Spain
| | - Thais Carmona
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Chemistry, University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Juan M Benito
- Instituto de Investigaciones Químicas (IIQ), CSIC - University of Sevilla, Sevilla, Spain
| | - Cédric Przybylski
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, Paris, France
| | - Carmen Ortiz Mellet
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, Seville, Spain
| | - Francisco Mendicuti
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Chemistry, University of Alcalá, Alcalá de Henares, Madrid, Spain
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9
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Cova TF, Milne BF, Pais AA. Host flexibility and space filling in supramolecular complexation of cyclodextrins: A free-energy-oriented approach. Carbohydr Polym 2019; 205:42-54. [DOI: 10.1016/j.carbpol.2018.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 10/03/2018] [Accepted: 10/03/2018] [Indexed: 12/20/2022]
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10
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Abstract
Quantification of noncovalent interactions is the key for the understanding of binding mechanisms, of biological systems, for the design of drugs, their delivery and for the design of receptors for separations, sensors, actuators, or smart materials.
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11
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Characterization of Cyclodextrin/Volatile Inclusion Complexes: A Review. Molecules 2018; 23:molecules23051204. [PMID: 29772824 PMCID: PMC6100373 DOI: 10.3390/molecules23051204] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/13/2018] [Accepted: 05/15/2018] [Indexed: 11/17/2022] Open
Abstract
Cyclodextrins (CDs) are a family of cyclic oligosaccharides that constitute one of the most widely used molecular hosts in supramolecular chemistry. Encapsulation in the hydrophobic cavity of CDs positively affects the physical and chemical characteristics of the guests upon the formation of inclusion complexes. Such a property is interestingly employed to retain volatile guests and reduce their volatility. Within this scope, the starting crucial point for a suitable and careful characterization of an inclusion complex is to assess the value of the formation constant (Kf), also called stability or binding constant. This task requires the application of the appropriate analytical method and technique. Thus, the aim of the present paper is to give a general overview of the main analytical tools used for the determination of Kf values for CD/volatile inclusion complexes. This review emphasizes on the advantages, inconvenients and limits of each applied method. A special attention is also dedicated to the improvement of the current methods and to the development of new techniques. Further, the applicability of each technique is illustrated by a summary of data obtained from the literature.
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12
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Schönbeck C. Charge Determines Guest Orientation: A Combined NMR and Molecular Dynamics Study of β-Cyclodextrins and Adamantane Derivatives. J Phys Chem B 2018; 122:4821-4827. [DOI: 10.1021/acs.jpcb.8b02579] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christian Schönbeck
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000, Roskilde, Denmark
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13
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Peng L, Liu S, Feng A, Yuan J. Polymeric Nanocarriers Based on Cyclodextrins for Drug Delivery: Host–Guest Interaction as Stimuli Responsive Linker. Mol Pharm 2017; 14:2475-2486. [DOI: 10.1021/acs.molpharmaceut.7b00160] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Liao Peng
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Senyang Liu
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Anchao Feng
- College
of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jinying Yuan
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
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14
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Schneider HJ. Spatial mismatch, non-additive binding energies and selectivity in supramolecular complexes. Org Biomol Chem 2017; 15:2146-2151. [DOI: 10.1039/c6ob02755e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A geometric mismatch in supramolecular complexes often leads to deviations from the additivity of binding energies with the consequence of large changes in selectivity and binding mode.
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Affiliation(s)
- Hans-Jörg Schneider
- FR Organische Chemie der Universität des Saarlandes
- D 66123 Saarbrücken
- Germany
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15
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Polydiacetylenyl β-cyclodextrin based smart vesicles for colorimetric assay of arginine and lysine. Sci Rep 2016; 6:31115. [PMID: 27502314 PMCID: PMC4977466 DOI: 10.1038/srep31115] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 07/14/2016] [Indexed: 11/08/2022] Open
Abstract
Selective visualization of arginine and lysine has been explored among 20 amino acids using the hybrid conjugate of β-cyclodextrin (β-CD) and polydiacetylene (PDA). The mono pentacosa-10,12-diynyl aminomethyl group was successfully coupled to either the primary or the secondary face of β-CD, where mono-6-amino-6-deoxy-β-CD or mono-3-amino-3-deoxy-β-CD reacted with the N-hydroxysuccinimide ester of 10,12-pentacosadiynoic acid. In this combinatorial system, the cylindrical β-cyclodextrin functions as a channel for the introduction of the cationic amino acids to the artificial membrane. The membrane perturbation and aggregation by the target amino acids could be exclusively visualized as a blue to red color change based on the responsive polydiacetylene domain. These interesting findings demonstrated that the developed β-CD conjugated PDA system may offer a new method of cell-penetrating mechanism, a promising vector system, as well as impact the production industry of arginine or lysine.
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16
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Zhao Q, Chen Y, Sun M, Wu XJ, Liu Y. Construction and drug delivery of a fluorescent TPE-bridged cyclodextrin/hyaluronic acid supramolecular assembly. RSC Adv 2016. [DOI: 10.1039/c6ra07572j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A luminescent supramolecular assembly was constructed for drug delivery.
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Affiliation(s)
- Qian Zhao
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
| | - Yong Chen
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
| | - Mo Sun
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
| | - Xian-Jing Wu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
| | - Yu Liu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
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17
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Rodell CB, Mealy JE, Burdick JA. Supramolecular Guest-Host Interactions for the Preparation of Biomedical Materials. Bioconjug Chem 2015; 26:2279-89. [PMID: 26439898 DOI: 10.1021/acs.bioconjchem.5b00483] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Supramolecular chemistry has emerged as an important technique for the formation of biomaterials, including nano- and microparticles and hydrogels. One specific class of supramolecular chemistry is the direct association of guest-host pairs, which involves host macrocycles such as cyclodextrins and cucurbit[n]urils and a wide range of guest molecules, where association is typically driven by molecule size and hydrophobicity. These systems are of particular interest in the biomedical field due to their dynamic nature, chemical diversity, relative ease of synthesis, and ability to interact with biological or synthetic molecules. In this review, we discuss aspects of polymeric material assembly mediated by guest-host interactions, including the fundamentals of assembly into functional biomedical materials. Additionally, applications of biomaterials that utilize guest-host interactions are discussed with a focus on injectable material formulations, the sequestration and delivery of encapsulated cargo (i.e., drugs, biomolecules), and the investigation of cell-material interactions (i.e., adhesion, differentiation, and delivery). While methodologies for guest-host mediated assembly and biological interaction have rapidly evolved in recent years, they remain far from realizing their full potential in the biomaterials field.
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Affiliation(s)
- Christopher B Rodell
- Department of Bioengineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Joshua E Mealy
- Department of Bioengineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Jason A Burdick
- Department of Bioengineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
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18
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Investigating the inclusion properties of aromatic amino acids complexing beta-cyclodextrins in model peptides. Amino Acids 2015; 47:2215-27. [DOI: 10.1007/s00726-015-2003-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 04/30/2015] [Indexed: 10/23/2022]
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19
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Ekanger LA, Allen MJ. Overcoming the concentration-dependence of responsive probes for magnetic resonance imaging. Metallomics 2015; 7:405-21. [PMID: 25579206 PMCID: PMC4357574 DOI: 10.1039/c4mt00289j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In magnetic resonance imaging, contrast agents are molecules that increase the contrast-to-noise ratio of non-invasively acquired images. The information gained from magnetic resonance imaging can be increased using responsive contrast agents that undergo chemical changes, and consequently changes to contrast enhancement, for example in response to specific biomarkers that are indicative of diseases. A major limitation with modern responsive contrast agents is concentration-dependence that requires the concentration of contrast agent to be known: an extremely challenging task in vivo. Here, we review advances in several strategies aimed at overcoming the concentration-dependent nature of responsive contrast agents.
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Affiliation(s)
- Levi A Ekanger
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA.
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20
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Chin YP, Abdul Raof SF, Sinniah S, Lee VS, Mohamad S, Abdul Manan NS. Inclusion complex of Alizarin Red S with β-cyclodextrin: Synthesis, spectral, electrochemical and computational studies. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.12.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Biedermann F, Nau WM, Schneider HJ. Neues zum hydrophoben Effekt - Studien mit supramolekularen Komplexen zeigen hochenergetisches Wasser als nichtkovalente Bindungstriebkraft. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310958] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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22
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Biedermann F, Nau WM, Schneider HJ. The hydrophobic effect revisited--studies with supramolecular complexes imply high-energy water as a noncovalent driving force. Angew Chem Int Ed Engl 2014; 53:11158-71. [PMID: 25070083 DOI: 10.1002/anie.201310958] [Citation(s) in RCA: 426] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Indexed: 01/14/2023]
Abstract
Traditional descriptions of the hydrophobic effect on the basis of entropic arguments or the calculation of solvent-occupied surfaces must be questioned in view of new results obtained with supramolecular complexes. In these studies, it was possible to separate hydrophobic from dispersive interactions, which are strongest in aqueous systems. Even very hydrophobic alkanes associate significantly only in cavities containing water molecules with an insufficient number of possible hydrogen bonds. The replacement of high-energy water in cavities by guest molecules is the essential enthalpic driving force for complexation, as borne out by data for complexes of cyclodextrins, cyclophanes, and cucurbiturils, for which complexation enthalpies of up to -100 kJ mol(-1) were reached for encapsulated alkyl residues. Water-box simulations were used to characterize the different contributions from high-energy water and enabled the calculation of the association free enthalpies for selected cucurbituril complexes to within a 10% deviation from experimental values. Cavities in artificial receptors are more apt to show the enthalpic effect of high-energy water than those in proteins or nucleic acids, because they bear fewer or no functional groups in the inner cavity to stabilize interior water molecules.
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Affiliation(s)
- Frank Biedermann
- ISIS-Institut de Science et d'Ingénierie Supramoléculaires, 67083 Strasbourg (France).
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Lis-Cieplak A, Sitkowski J, Kolodziejski W. Comparative proton nuclear magnetic resonance studies of amantadine complexes formed in aqueous solutions with three major cyclodextrins. J Pharm Sci 2013; 103:274-82. [PMID: 24282085 DOI: 10.1002/jps.23802] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 11/07/2013] [Accepted: 11/07/2013] [Indexed: 11/12/2022]
Abstract
Host-guest complexes of alpha-, beta-, and gamma-cyclodextrins (α-CD, β-CD, and γ-CD, respectively) with amantadine (1-aminoadamantane, AMA; an antiviral agent) were characterized in aqueous solutions using proton nuclear magnetic resonance (NMR) spectroscopy. Host-guest molecular interactions were manifested by changes in the chemical shifts of AMA protons. NMR Job's plots showed that the stoichiometry of all the studied complexes was 1:1. Two-dimensional T-ROESY experiments demonstrated that the complexes were formed by different degrees of incorporation of the adamantyl group of AMA into the CD cavity. The mode of AMA binding was proposed. The AMA molecule came into the α-CD cavity (the smallest size) or β-CD cavity (the intermediate size) through its wide entrance to become shallowly or deeply accommodated, respectively. In the complex of AMA with γ-CD (the largest cavity size), the adamantyl group was also quite deeply inserted into the CD cavity, but it arrived there through the narrow cavity entrance. It was found that the adamantyl group of AMA was best accommodated by the β-CD cavity. The binding constants Kaa of the studied complexes (in M(-1) ), determined from DOSY NMR, were fairly high; their values in an ascending order were: α-CD (183) < γ-CD (306) ≪ β-CD (5150).
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Affiliation(s)
- Agnieszka Lis-Cieplak
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Warsaw, 02-097, Poland
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Incorporation of camptothecin into reduction-degradable supramolecular micelles for enhancing its stability. Colloids Surf B Biointerfaces 2013; 109:167-75. [DOI: 10.1016/j.colsurfb.2013.03.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 03/23/2013] [Accepted: 03/28/2013] [Indexed: 11/24/2022]
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25
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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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26
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Osman SK, Brandl FP, Zayed GM, Teßmar JK, Göpferich AM. Cyclodextrin based hydrogels: Inclusion complex formation and micellization of adamantane and cholesterol grafted polymers. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.07.059] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Wang L, Zhong C, Xue P, Fu E. Fluorescent β-Cyclodextrins Modified by Isomeric Aminobenzamides: Synthesis, Conformational Analysis, and Fluorescent Behaviors. J Org Chem 2011; 76:4874-83. [DOI: 10.1021/jo2007829] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Lei Wang
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, PR China
| | - Cheng Zhong
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, PR China
| | - Peng Xue
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, PR China
| | - Enqin Fu
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, PR China
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Nau WM, Florea M, Assaf KI. Deep Inside Cucurbiturils: Physical Properties and Volumes of their Inner Cavity Determine the Hydrophobic Driving Force for Host-Guest Complexation. Isr J Chem 2011. [DOI: 10.1002/ijch.201100044] [Citation(s) in RCA: 283] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Loukou C, Changenet-Barret P, Rager MN, Plaza P, Martin MM, Mallet JM. The design, synthesis and photochemical study of a biomimetic cyclodextrin model of photoactive yellow protein (PYP). Org Biomol Chem 2011; 9:2209-18. [PMID: 21301710 DOI: 10.1039/c0ob00646g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The design, synthesis and study of the photophysical and photochemical properties of the first biomimetic cyclodextrin (CD) model of photoactive yellow protein (PYP) are described. This model bears a deprotonated trans-p-coumaric acid chromophore, covalently linked via a cysteine moiety to a permethylated 6-monoamino β-CD. NMR and UV/Visible spectroscopy studies showed the formation of strong self-inclusion complexes in water at basic pH. Steady-state photolysis demonstrated that, unlike the free chromophore in solution, excitation of the model molecule leads to the formation of a photoproduct identified as the cis isomer by NMR spectroscopy. These observations provide evidence that the restricted CD cavity offers a promising framework for the design of biomimetic models of the PYP hydrophobic pocket.
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Affiliation(s)
- Christina Loukou
- Département de Chimie, UMR-CNRS 7203, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, Cedex 05, France
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Ortiz M, Fragoso A, O'Sullivan CK. Detection of Antigliadin Autoantibodies in Celiac Patient Samples Using a Cyclodextrin-Based Supramolecular Biosensor. Anal Chem 2011; 83:2931-8. [DOI: 10.1021/ac102956p] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mayreli Ortiz
- Nanobiotechnology and Bioanalysis Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
| | - Alex Fragoso
- Nanobiotechnology and Bioanalysis Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
| | - Ciara K. O'Sullivan
- Nanobiotechnology and Bioanalysis Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
- Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys, 23, 08010 Barcelona, Spain
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31
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Mishur RJ, Griffin ME, Battle CH, Shan B, Jayawickramarajah J. Molecular recognition and enhancement of aqueous solubility and bioactivity of CD437 by β-cyclodextrin. Bioorg Med Chem Lett 2010; 21:857-60. [PMID: 21185186 DOI: 10.1016/j.bmcl.2010.11.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 11/09/2010] [Accepted: 11/16/2010] [Indexed: 11/28/2022]
Abstract
CD437 (6-[3-(1-adamantyl)-4-hydroxyphenyl]-2-naphthalene carboxylic acid) is a novel synthetic retinoic acid derivative that has been shown to selectively induce apoptosis in human lung cancer cells. This compound, however, is limited in its application due to its low solubility in aqueous solutions. One technique for increasing the solubility and bioavailability of a cytotoxic agent is the formation of inclusion complexes with cyclodextrins. Herein, we report the formation and characterization of a 2:1 complex between β-cyclodextrin (β-CD) and CD437. It is shown that CD437 is a tight binder of β-CD with an overall association constant of 2.6±0.6×10(7)M(-2). In addition, we demonstrate (a) that β-CD-derived complexation enhances the aqueous solubility of CD437, and (b) that a significant increase in the toxicity of CD437 against a human lung adenocarcinoma cell line can be achieved by co-treatment with β-CD.
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Affiliation(s)
- Robert J Mishur
- Department of Medicine, Tulane University Health Sciences Center, 1430 Tulane Ave, New Orleans, LA 70112, United States
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32
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Gurnev PA, Harries D, Parsegian VA, Bezrukov SM. Osmotic stress regulates the strength and kinetics of sugar binding to the maltoporin channel. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:454110. [PMID: 21339598 PMCID: PMC3128435 DOI: 10.1088/0953-8984/22/45/454110] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We study the effect of osmotic stress, exerted by salts, on carbohydrate binding to the sugar-specific bacterial channel maltoporin. When the channel is reconstituted into planar lipid bilayers, single events of its occlusion by sugar are seen as transient interruptions in the flow of small ions. We find that, for most salts, changes in the free energy of maltoporin-sugar binding vary linearly with solution osmotic pressure. Such a change in binding with solution osmolarity indicates that for each salt a constant number of salt-excluding water molecules is released upon sugar-maltoporin association at all salt concentrations. We find that larger numbers of water molecules are released upon binding of the cyclic carbohydrate β-cyclodextrin (CD) than upon binding of the corresponding linear homologue maltoheptaose (m7). Remarkably, the extent to which salts affect the binding constants and rates depends sensitively on the type of salt; dehydration in solutions of different anions corresponds to the Hofmeister series. In sodium sulfate solutions, CD and m7 respectively release about 120 and 35 salt-excluding water molecules; in sodium chloride solutions, 35 and 15 waters. No water release is observed with sodium bromide. Finally, by adding adamantane, known to form an inclusion complex with CD, we can infer that CD not only dehydrates but also undergoes a conformational change upon binding to the channel. As a practical outcome, our results also demonstrate how osmotic stress can improve single-molecule detection of different solutes using protein-based nanopores.
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Affiliation(s)
- Philip A Gurnev
- Laboratory of Physical and Structural Biology, Program in Physical Biology, NICHD, National Institutes of Health, Bethesda, MD, USA
| | - Daniel Harries
- Institute of Chemistry and the Fritz Haber Research Center, The Hebrew University, Jerusalem, Israel
| | | | - Sergey M Bezrukov
- Laboratory of Physical and Structural Biology, Program in Physical Biology, NICHD, National Institutes of Health, Bethesda, MD, USA
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Yamamura M, Sasaki M, Kyotani M, Orita H, Nabeshima T. Self-Assembled Nanostructures of Tailored Multi-Metal Complexes and Morphology Control by Counter-Anion Exchange. Chemistry 2010; 16:10638-43. [DOI: 10.1002/chem.201001376] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Ding L, He J, Fu J, Zhang J. Study on beta-cyclodextrin inclusion of Zn(II) aromatic complex and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:604-609. [PMID: 19969502 DOI: 10.1016/j.saa.2009.11.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2009] [Revised: 11/04/2009] [Accepted: 11/10/2009] [Indexed: 05/28/2023]
Abstract
A new beta-cyclodextrin (beta-CD) inclusion compound Zn(2H1NA)(2)x 2beta-CD (2H1NA=2-hydroxy-1-naphthoic acid) was prepared. The structure was characterized by (1)H NMR, IR, the fluorescence spectra, thermogravimetric analysis (TG-DTA) and elementary analysis. Meanwhile, the mechanism of the formation of the supramolecular system (2H1NA:Zn(II):beta-CD) was studied and discussed by spectrofluorimetry. The results showed that the naphthalene rings of the Zn(II) aromatic complex Zn(2H1NA)(2) were encapsulated within the beta-CD's cavity to form a 2:1 stoichiometry host-guest compound. The inclusion constant calculated was 1.27 x 10(4)(L/mol)(2). A spectrofluorimetric method for the determination of 2H1NA in bulk aqueous solution in the presence of beta-CD was developed based on the great enhancement of the fluorescence intensity of 2H1NA. The linear relationship was obtained in the range of 9.00 x 10(-7) to 2.50 x 10(-5)mol/L and the detection limit was 8.00 x 10(-7)mol/L. The proposed method was successfully applied to determine 2H1NA in waste water with recoveries of 97-104%.
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Affiliation(s)
- Lixiu Ding
- Department of Chemistry, Lanzhou University, Tianshui Road 222, Lanzhou 730000, PR China.
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Abstract
Supramolecular chemistry has expanded dramatically in recent years both in terms of potential applications and in its relevance to analogous biological systems. The formation and function of supramolecular complexes occur through a multiplicity of often difficult to differentiate noncovalent forces. The aim of this Review is to describe the crucial interaction mechanisms in context, and thus classify the entire subject. In most cases, organic host-guest complexes have been selected as examples, but biologically relevant problems are also considered. An understanding and quantification of intermolecular interactions is of importance both for the rational planning of new supramolecular systems, including intelligent materials, as well as for developing new biologically active agents.
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Affiliation(s)
- Hans-Jörg Schneider
- Organische Chemie, Universität des Saarlandes, 66041 Saarbrücken, Deutschland.
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37
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Yamazaki T, Kovalenko A. Spatial Decomposition Analysis of the Thermodynamics of Cyclodextrin Complexation. J Chem Theory Comput 2009; 5:1723-30. [DOI: 10.1021/ct9000729] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takeshi Yamazaki
- National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton, Alberta, T6G 2M9, Canada, and Department of Mechanical Engineering, University of Alberta, Edmonton, Canada
| | - Andriy Kovalenko
- National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton, Alberta, T6G 2M9, Canada, and Department of Mechanical Engineering, University of Alberta, Edmonton, Canada
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39
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Pressure perturbation calorimetry, heat capacity and the role of water in protein stability and interactions. Biochem Soc Trans 2008; 35:1547-50. [PMID: 18031264 DOI: 10.1042/bst0351547] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
It is widely acknowledged, and usually self-evident, that solvent water plays a crucial role in the overall thermodynamics of protein stabilization and biomolecular interactions. Yet we lack experimental techniques that can probe unambiguously the nature of protein-water or ligand-water interactions and how they might change during protein folding or ligand binding. PPC (pressure perturbation calorimetry) is a relatively new technique based on detection of the heat effects arising from application of relatively small pressure perturbations (+/-5 atm; 1 atm=101.325 kPa) to dilute aqueous solutions of proteins or other biomolecules. We show here how this can be related to changes in solvation/hydration during protein-protein and protein-ligand interactions. Measurements of 'anomalous' heat capacity effects in a wide variety of biomolecular interactions can also be related to solvation effects as part of a quite fundamental principle that is emerging, showing how the apparently unusual thermodynamics of interactions in water can be rationalized as an inevitable consequence of processes involving the co-operative interaction of multiple weak interactions. This leads to a generic picture of the thermodynamics of protein folding stabilization in which hydrogen-bonding plays a much more prominent role than has been hitherto supposed.
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40
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Gómez-Biagi RF, Jagt RBC, Nitz M. Remarkably stable inclusion complexes with heptakis-[6-deoxy-6-(2-aminoethylsulfanyl)]-β-cyclodextrin. Org Biomol Chem 2008; 6:4622-6. [DOI: 10.1039/b813999g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Lo Meo P, D'Anna F, Riela S, Gruttadauria M, Noto R. Host–guest interactions involving cyclodextrins: useful complementary insights achieved by polarimetry. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.06.065] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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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: 85] [Impact Index Per Article: 5.0] [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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43
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Inclusion complex formation of α- and β-cyclodextrins with aminobenzoic acids in aqueous solution studied by 1H NMR. J INCL PHENOM MACRO 2007. [DOI: 10.1007/s10847-007-9327-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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Xue C, Palaniappan K, Arumugam G, Hackney SA, Liu J, Liu H. Sonogashira reactions catalyzed by water-soluble, β-cyclodextrin-capped palladium nanoparticles. Catal Letters 2007. [DOI: 10.1007/s10562-007-9108-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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45
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Huang H, Liu F, Jia BX, Xu KH, Chen ZZ, Tang B. Study on the Supramolecular Interaction ofβ-Cyclodextrin with Gemfibrozil by Spectrofluorimetry and Its Analytical Application. CHINESE J CHEM 2007. [DOI: 10.1002/cjoc.200790065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Wang X, Wang J, Wang Y, Chen ZZ, Tang B. Study on the multirecognition mechanism of supramolecular interaction in the thiabendazole/β-cyclodextrin/Triton X-100. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.08.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Jara F, Domínguez M, Rezende MC. The interaction of solvatochromic pyridiniophenolates with cyclodextrins. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.05.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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48
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TOŠNER ZDENĚK, ASKI SAHARNIKKHOU, KOWALEWSKI JOZEF. Rotational Dynamics of Adamantanecarboxylic Acid in Complex with β-cyclodextrin. J INCL PHENOM MACRO 2005. [DOI: 10.1007/s10847-005-9019-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Wang YH, Zhu MZ, Ding XY, Ye JP, Liu L, Guo QX. Photoinduced Electron Transfer between Mono-6-p-nitrobenzoyl-β-cyclodextrin and Adamantanamine-Cn-porphyrins. J Phys Chem B 2003. [DOI: 10.1021/jp0347419] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yong-Hui Wang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, Beijing 10080, China, and National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Man-Zhou Zhu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, Beijing 10080, China, and National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Yuan Ding
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, Beijing 10080, China, and National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Jian-Ping Ye
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, Beijing 10080, China, and National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Lei Liu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, Beijing 10080, China, and National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Qing-Xiang Guo
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, Beijing 10080, China, and National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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50
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Cao Y, Xiao X, Lu R, Guo Q. 1H NMR titration and quantum calculation for the inclusion complexes of styrene and α-methyl styrene with α, β and γ-cyclodextrins. J Mol Struct 2003. [DOI: 10.1016/j.molstruc.2003.07.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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