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Olesińska M, Wu G, Gómez-Coca S, Antón-García D, Szabó I, Rosta E, Scherman OA. Modular supramolecular dimerization of optically tunable extended aryl viologens. Chem Sci 2019; 10:8806-8811. [PMID: 31803453 PMCID: PMC6849629 DOI: 10.1039/c9sc03057c] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 07/23/2019] [Indexed: 12/13/2022] Open
Abstract
Cucurbit[8]uril (CB[8]) mediated assembly of extended aryl viologens (EVs) into optically tunable dimers is reported for the first time.
Cucurbit[8]uril (CB[8]) mediated assembly of extended aryl viologens (EVs) into optically tunable dimers is reported for the first time. We show that the modular design and synthesis of a new class of π-conjugated viologen derivatives with rigid aromatic or heteroaromatic bridging units as well as electron donating molecular recognition motifs enable their self-assembly into 2 : 2 complexes with CB[8]. The quantitative dimerization process involving these two molecular components in an aqueous solution enables excimer-like interactions between closely packed charged guests giving rise to distinct spectroscopic behavior. The nature of these dimers (CB[8]2·(EV[X]R)2) in the ground and excited states was characterized by NMR, isothermal titration calorimetry, and steady-state spectroscopic measurements.
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Affiliation(s)
- Magdalena Olesińska
- Melville Laboratory for Polymer Synthesis , Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Guanglu Wu
- Melville Laboratory for Polymer Synthesis , Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Silvia Gómez-Coca
- Department of Chemistry , King's College London , 7 Trinity Street , London , SE1 1DB , UK
| | - Daniel Antón-García
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK
| | - Istvan Szabó
- Department of Chemistry , King's College London , 7 Trinity Street , London , SE1 1DB , UK
| | - Edina Rosta
- Department of Chemistry , King's College London , 7 Trinity Street , London , SE1 1DB , UK
| | - Oren A Scherman
- Melville Laboratory for Polymer Synthesis , Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
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2
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Zgani I, Idriss H, Barbot C, Djedaïni-Pilard F, Petit S, Hubert-Roux M, Estour F, Gouhier G. Positive variation of the MRI signal via intramolecular inclusion complexation of a C-2 functionalized β-cyclodextrin. Org Biomol Chem 2017; 15:564-569. [DOI: 10.1039/c6ob02583h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The synthesis of a contrast agent based on a β-cyclodextrin is reported. An enhancement of relaxivity in the presence of an intramolecular inclusion complex is observed.
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Affiliation(s)
- I. Zgani
- Normandie Univ
- COBRA
- UMR 6014
- FR 3038
- INSA Rouen
| | - H. Idriss
- Normandie Univ
- COBRA
- UMR 6014
- FR 3038
- INSA Rouen
| | - C. Barbot
- Normandie Univ
- COBRA
- UMR 6014
- FR 3038
- INSA Rouen
| | | | - S. Petit
- Normandie Univ
- SMS
- EA 3233
- 76821 Mont Saint Aignan Cedex
- France
| | | | - F. Estour
- Normandie Univ
- COBRA
- UMR 6014
- FR 3038
- INSA Rouen
| | - G. Gouhier
- Normandie Univ
- COBRA
- UMR 6014
- FR 3038
- INSA Rouen
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3
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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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4
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González-Álvarez MJ, Benito JM, García Fernández JM, Ortiz Mellet C, Mendicuti F. Influence of the macroring size on the self-association thermodynamics of cyclodextrins with a double-linked naphthalene at the secondary face. J Phys Chem B 2013; 117:5472-85. [PMID: 23590313 DOI: 10.1021/jp400784t] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The conformational properties and aggregation behavior of two selectively modified cyclomaltooligosaccharides (cyclodextrins, CDs) containing a double-linked 1,8-dimethylnaphthalene cap-like moiety at the secondary face, namely, 2(I),3(I)-O-(1,8-dimetylnaphthalene-α,α'-diyl)-per-O-Me-α- and -γ-cyclodextrins (NmαCD and NmγCD, respectively), in water and in organic solvents were investigated. Both CD derivatives self-associated in water to form dimer species, but the characteristics of the dimerization process and of the resulting dimer strongly depended on the size of the macrocycle. Dimerization constants, thermodynamic parameters upon association, and information about the preferred conformations of the monomer and dimer CD structures were obtained by using NMR, UV-vis, steady-state and time-resolved fluorescence, and circular dichroism experimental techniques, as well as molecular mechanics (MM) and molecular dynamics (MD) simulations. The complexation of 1,8-di(methoxymethyl)naphathalene (oNy) and the heteroassociation of both NmCDs with their permethylated CD partners (mCDs), lacking the aromatic cap, were examined. In addition, the influence of the size of the chromophore moiety on the thermodynamics of self-association was also assessed by comparison of the results obtained for the new naphthalene derivatives with those of the 2(I),3(I)-O-(1,2-xylylene)-modified CD analogues (XmCDs).
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5
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Rotzler J, Drayss S, Hampe O, Häussinger D, Mayor M. Molecular Daisy Chains: Synthesis and Aggregation Studies of an Amphiphilic Molecular Rod. Chemistry 2013; 19:2089-101. [DOI: 10.1002/chem.201202498] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 10/09/2012] [Indexed: 11/10/2022]
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6
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Abstract
This tutorial review summarizes the progress made towards mechanically interlocked daisy chains. Such materials can be seen as a further development in polymer science, where the conventional covalent interlinking bonds are replaced by supramolecular binding concepts. Materials in which the mechanical bond is an integral part of the polymeric backbone are expected to possess unique macroscopic properties and are therefore the synthetic aim in an ever growing research community. After introducing general considerations about daisy chains, the most common analytic methods to get insight into the aggregation behaviour of such self-complementary monomers are presented. Cyclodextrins/aromatic rods, crown ethers/cationic rods and pillararenes/alkyl chains are systems used to achieve daisy chain-like molecular arrays. By comparison of the reported systems, conclusions about an improved structural design are drawn.
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Affiliation(s)
- Jürgen Rotzler
- University of Basel, Department of Chemistry, St. Johannsring 19, CH-4056 Basel, Switzerland
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7
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Kurkov SV, Loftsson T. Cyclodextrins. Int J Pharm 2012; 453:167-80. [PMID: 22771733 DOI: 10.1016/j.ijpharm.2012.06.055] [Citation(s) in RCA: 542] [Impact Index Per Article: 45.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 06/25/2012] [Accepted: 06/26/2012] [Indexed: 01/24/2023]
Abstract
Although cyclodextrins (CDs) have been studied for over 100 years and can be found in at least 35 pharmaceutical products, they are still regarded as novel pharmaceutical excipients. CDs are oligosaccharides that possess biological properties that are similar to their linear counterparts, but some of their physicochemical properties differ. CDs are able to form water-soluble inclusion complexes with many poorly soluble lipophilic drugs. Thus, CDs are used to enhance the aqueous solubility of drugs and to improve drug bioavailability after, for example, oral administration. Through CD complexation, poorly soluble drugs can be formulated as aqueous parenteral solutions, nasal sprays and eye drop solutions. These oligosaccharides are being recognized as non-toxic and pharmacologically inactive excipients for both drug and food products. Recently, it has been observed that CDs and CD complexes in particular self-assemble to form nanoparticles and that, under certain conditions, these nanoparticles can self-assemble to form microparticles. These properties have changed the way we perform CD research and have given rise to new CD formulation opportunities. Here, the pharmaceutical applications of CDs are reviewed with an emphasis on their solubilizing properties, their tendency to self-assemble to form aggregates, CD ternary complexes, and their metabolism and pharmacokinetics.
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Affiliation(s)
- Sergey V Kurkov
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavik, Iceland
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8
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González-Álvarez MJ, Mayordomo N, Gallego-Yerga L, Mellet CO, Mendicuti F. Improving inclusion capabilities of permethylated cyclodextrins by appending a cap-like aromatic moiety. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.02.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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9
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Li WJ, Fan Z, Diao CH, Wang M. The binding behavior of a helical column supramolecule formed by 6-deoxy-6-(2-pyrimidinethio)-β-cyclodextrin in both solution and the solid state. Carbohydr Res 2012; 349:103-7. [PMID: 22188615 DOI: 10.1016/j.carres.2011.11.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 11/14/2011] [Accepted: 11/16/2011] [Indexed: 10/14/2022]
Abstract
The mono-modified β-cyclodextrin, 6-deoxy-6-(2-pyrimidinethio)-β-cyclodextrin, was synthesized and characterized. Its self-assembly behavior was measured in both solution and the solid state. The crystal structure shows that the pyrimidine group penetrates deeply into the hydrophobic cavity of the adjacent β-cyclodextrin from the second side, and the molecules are stacked along the twofold screw axis to form a head-to-tail helical columnar superstructure. Furthermore, the effective binding constant K and the aggregation number n were calculated to be 354M(-1) and 2.1, respectively, by means of (1)H NMR spectroscopy titration. The results indicate that the intramolecular/intermolecular interactions are a critical factor in determining the self-assembly behavior.
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Affiliation(s)
- Wen-Jie Li
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, PR China
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10
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González-Álvarez MJ, Méndez-Ardoy A, Benito JM, García Fernández JM, Mendicuti F. Self-association of a naphthalene-capped-β-cyclodextrin through cooperative strong hydrophobic interactions. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Li ZT, Zhao X, Jiang XK, Zhao CX, Chen Z, Chen YT. Intramolecular Coaggregation Behavior in Novel Cyclotriveratrylenes with Cholic Acid Podants. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20010190320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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12
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Chen Y, Li F, Liu BW, Jiang BP, Zhang HY, Wang LH, Liu Y. Thermodynamic origin of selective binding of β-cyclodextrin derivatives with chiral chromophoric substituents toward steroids. J Phys Chem B 2010; 114:16147-55. [PMID: 20695496 DOI: 10.1021/jp105821s] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two β-cyclodextrin derivatives with chiral chromophoric substituents, that is, L- (1) and D-tyrosine-modified β-cyclodextrin (2), were synthesized and fully characterized. Their inclusion modes, binding abilities, and molecular selectivities with four steroid guests, that is, cholic acid sodium salt (CA), deoxycholic acid sodium salt (DCA), glycochoic acid sodium salt (GCA), and taurocholic acid sodium salt (TCA), were investigated by the circular dichroism, 2D NMR, and isothermal titration microcalorimetry (ITC). The results obtained from the circular dichroism and 2D NMR showed that two hosts adopted the different binding geometry, and these differences subsequently resulted in the significant differences of molecular binding abilities and selectivities. As compared with native β-cyclodextrin and tryptophan-modified β-cyclodextrin, host 2 showed the enhanced binding abilities for CA and DCA but the decreased binding abilities for GCA and TCA; however, host 1 showed the decreased binding abilities for all four bile salts. The best guest selectivity and the best host selectivity were K(S)(2-DCA)/K(S)(2-TCA) = 12.6 and K(S)(2-CA)/K(S)(1-CA) = 10, respectively, both exhibiting great enhancement as compared with the corresponding values of the previously reported L- and D-tryptophan-modified β-cyclodextrins. Thermodynamically, it was the favorable enthalpic gain that led to the high guest selectivity and host selectivity.
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Affiliation(s)
- Yong Chen
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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13
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Hu S, Li J, Xiang J, Pan J, Luo S, Cheng JP. Asymmetric Supramolecular Primary Amine Catalysis in Aqueous Buffer: Connections of Selective Recognition and Asymmetric Catalysis. J Am Chem Soc 2010; 132:7216-28. [DOI: 10.1021/ja102819g] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shenshen Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jiuyuan Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Junfeng Xiang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jie Pan
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Sanzhong Luo
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jin-Pei Cheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
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14
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Gamieldien MR, Maestre I, Jaime C, Naidoo KJ. Optimal Configurations of “Capped” β-Cyclodextrin Dimers in Water Maximise Hydrophobic Association. Chemphyschem 2010; 11:452-9. [DOI: 10.1002/cphc.200900541] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Affiliation(s)
- Akira Harada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Hiroyasu Yamaguchi
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Yoshinori Takashima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
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16
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Fukuhara G, Mori T, Inoue Y. Competitive Enantiodifferentiating Anti-Markovnikov Photoaddition of Water and Methanol to 1,1-Diphenylpropene Using A Sensitizing Cyclodextrin Host. J Org Chem 2009; 74:6714-27. [DOI: 10.1021/jo9012628] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gaku Fukuhara
- Department of Applied Chemistry, Osaka University, 2-1Yamada-oka, Suita 565-0871, Japan
| | - Tadashi Mori
- Department of Applied Chemistry, Osaka University, 2-1Yamada-oka, Suita 565-0871, Japan
| | - Yoshihisa Inoue
- Department of Applied Chemistry, Osaka University, 2-1Yamada-oka, Suita 565-0871, Japan
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17
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Thermodynamics of the Dimer Formation of 2I,3I-O-(o-Xylylene)-per-O-Me-γ-cyclodextrin: Fluorescence, Molecular Mechanics and Molecular Dynamics. J Fluoresc 2009; 19:975-88. [DOI: 10.1007/s10895-009-0497-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 06/05/2009] [Indexed: 10/20/2022]
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18
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Shi J, Guo DS, Ding F, Liu Y. Unique Regioselective Binding of Permethylated β-Cyclodextrin with Azobenzene Derivatives. European J Org Chem 2009. [DOI: 10.1002/ejoc.200800829] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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González-Álvarez MJ, Balbuena P, Mellet CO, Fernández JMG, Mendicuti F. Study of the Conformational and Self-Aggregation Properties of 2I,3I-O-(o-Xylylene)-per-O-Me-α- and -β-cyclodextrins by Fluorescence and Molecular Modeling. J Phys Chem B 2008; 112:13717-29. [DOI: 10.1021/jp077670c] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- M. José González-Álvarez
- Dpto. Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Spain, Dpto. Química Orgánica, Fac. de Química, Universidad de Sevilla, E-41012, Sevilla, Spain, and Instituto de Investigaciones Químicas, CSIC, E-41092 Sevilla, Spain
| | - Patricia Balbuena
- Dpto. Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Spain, Dpto. Química Orgánica, Fac. de Química, Universidad de Sevilla, E-41012, Sevilla, Spain, and Instituto de Investigaciones Químicas, CSIC, E-41092 Sevilla, Spain
| | - Carmen Ortiz Mellet
- Dpto. Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Spain, Dpto. Química Orgánica, Fac. de Química, Universidad de Sevilla, E-41012, Sevilla, Spain, and Instituto de Investigaciones Químicas, CSIC, E-41092 Sevilla, Spain
| | - José M. García Fernández
- Dpto. Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Spain, Dpto. Química Orgánica, Fac. de Química, Universidad de Sevilla, E-41012, Sevilla, Spain, and Instituto de Investigaciones Químicas, CSIC, E-41092 Sevilla, Spain
| | - Francisco Mendicuti
- Dpto. Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Spain, Dpto. Química Orgánica, Fac. de Química, Universidad de Sevilla, E-41012, Sevilla, Spain, and Instituto de Investigaciones Químicas, CSIC, E-41092 Sevilla, Spain
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20
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Jing B, Chen X, Wang X, Yang C, Xie Y, Qiu H. Self-Assembly Vesicles Made from a Cyclodextrin Supramolecular Complex. Chemistry 2007; 13:9137-42. [PMID: 17663495 DOI: 10.1002/chem.200700729] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Self-assembly vesicles have been made from a cyclodextrin (CD) supramolecular complex, which is cooperatively formed with natural beta-CD, 1-naphthylammonium chloride (NA), and sodium bis(2-ethyl-1-hexyl)sulfosuccinate (AOT) by weak noncovalent interactions. In the complex structure, a NA molecule is included inside a beta-CD molecule while it is coupled with an AOT molecule on one side. The supramolecular structure and morphology of the vesicles were characterized by transmission electron microscopy (TEM) and dynamic light scattering (DLS), respectively. The mechanism of vesicle formation and transition is discussed along with the data obtained from induced circular dichroism (ICD) and UV/visible spectroscopy, polarized optical microscopy (POM), and (1)H NMR spectroscopy. Both the fabrication and the transition of vesicles are controlled by the inclusion equilibria and the cooperative binding of noncovalent interactions, which include the "key-lock" principle, electrostatic interactions, pi-pi stacking, and amphiphilic hydrophobic association.
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Affiliation(s)
- Bo Jing
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China
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21
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Liu Y, Shi J, Guo DS. Novel permethylated beta-cyclodextrin derivatives appended with chromophores as efficient fluorescent sensors for the molecular recognition of bile salts. J Org Chem 2007; 72:8227-34. [PMID: 17914840 DOI: 10.1021/jo071131m] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two novel permethylated beta-cyclodextrin (PM-beta-CD) derivatives, i.e., 6I-O-(1-naphtholxy)-2I,31-di-O-methylhexakis(2II-VII,3II-VII,6II-VII-tri-O-methyl)-beta-cyclodextrin (1) and 6I-O-(8-hydroxyquinoline)-2I,31-di-O-methylhexakis(2II-VII,3II-VII,6II-VII- tri-O-methyl)-beta-cyclodextrin (2), were synthesized in satisfactory yields, and their inclusion modes, complex-induced fluorescent behaviors, binding ability, and selectivity for bile salts of biological relevance (cholic acid sodium salt, CA; deoxycholic acid sodium salt, DCA; glycochoic acid sodium salt, GCA; taurocholic acid sodium salt, TCA) were investigated by the circular dichroism, 2D NMR, steady-state, and time-resolved fluorescent spectra. The results obtained from induced circular dichroism and ROESY spectra show that the chromophore groups of 1 and 2 reside in the central cavity of PM-beta-CD, and are expelled to the region of narrow torus rim upon complexation with bile guests, which presents the binding mode of cooperative inclusion. The transfer of the chromophore groups from the central cavity to the more hydrophobic torus rim leads to the remarkable increase of fluorescent intensities and longer fluorescent lifetimes of hosts 1 and 2 upon gradual addition of bile salts, which is importantly distinct from the molecular recognition of the chromophore-modified beta-CD species with bile salts. Interestingly, hosts 1 and 2 present much stronger binding ability for bile guests than PM-beta-CD. Differing from native beta-CD, all the PM-beta-CDs are more prone to include bile salts with longer tails, such as GCA and TCA. Their corresponding binding ability and molecular selectivity are closely discussed from the viewpoints of difference of cavity size/shape between beta-CD and PM-beta-CD, effect of substituent groups, and structures of bile guests, respectively.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
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22
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Nakashima H, Yoshida N. Fluorescent detection for cyclic and acyclic alcohol guests by naphthalene-appended amino-beta-cyclodextrins. Org Lett 2007; 8:4997-5000. [PMID: 17048827 DOI: 10.1021/ol0616079] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spectroscopic and thermodynamic investigations on complexation of naphthalene-appended amino-beta-cyclodextrins 1 and 2 with cyclic alcohols (cyclohexanol and cycloheptanol) and acyclic alcohols (1-pentanol, 2-pentanol, 1-hexanol, and 1-heptanol) have been carried out. Host 1 exhibits a drastic fluorescent enhanced-signal change in the presence of alcohol guests in aqueous solution. [structure: see text]
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Affiliation(s)
- Hironori Nakashima
- Group of Molecular Materials Chemistry, Section of Environmental Materials Science, Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
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He Y, Fu P, Shen X, Gao H. Cyclodextrin-based aggregates and characterization by microscopy. Micron 2007; 39:495-516. [PMID: 17706427 DOI: 10.1016/j.micron.2007.06.017] [Citation(s) in RCA: 196] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Accepted: 06/04/2007] [Indexed: 11/27/2022]
Abstract
Cyclodextrin-based aggregates have been widely investigated with microscopies such as STM, AFM, SEM, TEM, and fluorescent microscopy to obtain the direct morphology and structure of samples. In the present review, we discuss various types of cyclodextrin aggregates, that is, native and modified cyclodextrins, inclusion complexes and their aggregates of cyclodextrins, cyclodextrin rotaxanes and polyrotaxanes, cyclodextrin nanotubes and their secondary assembly, and other high-order aggregates of cyclodextrins. Especially, we focus on the use of microscopy to characterize above aggregates. The application of modern microscopy tools promotes the investigation on cyclodextrins.
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Affiliation(s)
- Yifeng He
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
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1H NMR titration study of stimuli-responsive supramolecular assemblies: inclusion complexes between PEG–b-PEI copolymer-grafted dextran and naphthalene-appended γ-cyclodextrin via double-strand inclusion. J INCL PHENOM MACRO 2007. [DOI: 10.1007/s10847-006-9181-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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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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26
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Wu A, Shen X, Gao H. Investigation on photophysical properties of a substituted 3H-indole-modified β-cyclodextrin. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.05.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Fukuhara G, Mori T, Wada T, Inoue Y. Entropy-Controlled Supramolecular Photochirogenesis: Enantiodifferentiating Z−E Photoisomerization of Cyclooctene Included and Sensitized by Permethylated 6-O-Modified β-Cyclodextrins. J Org Chem 2006; 71:8233-43. [PMID: 17025317 DOI: 10.1021/jo061389x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Permethylated 6-O-modified beta-cyclodextrins 2a-2d were synthesized as novel photosensitizing hosts with a flexible skeleton. Circular dichroism (CD) and 2D NMR spectral examinations of benzoate 2a revealed that the benzoate moiety is deeply included into its own cavity in aqueous solution. Upon addition of (Z)-cyclooctene (1Z) to a 50% aqueous methanol solution of 2a at 25 degrees C, the benzoate moiety of 2a was gradually excluded from the cavity as indicated by the CD spectral changes; the Job's plot revealed the formation of a 1:1 complex of 2a with 1Z. The binding constants for the complexation of 1Z by 2a were determined by CD spectral titration in 50% aqueous methanol at various temperatures. The van't Hoff analysis of the obtained data afforded the thermodynamic parameters (DeltaH degrees = -3.1 kJ mol(-1), DeltaS degrees = 48.5 J mol(-1) K(-1)), demonstrating the entropy-driven complexation by the permethylated cyclodextrin. This is in sharp contrast to the complexation of 1Z by nonmethylated beta-cyclodextrin benzoate that is driven by enthalpy (DeltaH degrees = -31.8 kJ mol(-1) and DeltaS degrees = -51.1 J mol(-1) K(-1)). Upon supramolecular photosensitization with 2a-2d, 1Z isomerized to the (E)-isomer (1E) in moderate enantiomeric excesses (ee's), which however displayed significant temperature dependence with accompanying switching of the product's chirality in an extreme case. Such dynamic behavior of ee is very different from that reported for the photosensitization with nonmethylated cyclodextrin benzoate, where the product's ee is controlled by host occupancy. Eyring treatment of the ee obtained at various temperatures (<0 degrees C) gave the differential activation parameters for the enantiodifferentiation process occurring in the supramolecular exciplex, revealing the crucial role of entropy, as indicated by the DeltaDeltaS(++) value changing dynamically from +4 to -24 J K(-1) mol(-1). The origin of the contrasting behavior of permethylated versus nonmethylated cyclodextrin hosts is inferred to be the conformational flexibility of the former host, which enables the entropy-driven guest complexation in the ground state and the entropy-controlled enantiodifferentiation in the excited state.
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Affiliation(s)
- Gaku Fukuhara
- Department of Applied Chemistry, Osaka University, PRESTO (JST), Suita 565-0871, Japan
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28
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Bardelang D, Rockenbauer A, Jicsinszky L, Finet JP, Karoui H, Lambert S, Marque SRA, Tordo P. Nitroxide Bound β-Cyclodextrin: Is There an Inclusion Complex? J Org Chem 2006; 71:7657-67. [PMID: 16995671 DOI: 10.1021/jo061194p] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
236CDTIPNO, a derivative of the persistent free radical TIPNO (1,1-dimethylethyl 2-methyl-1-phenylpropyl nitroxide) covalently bound to a permethylated-beta-cyclodextrin, was prepared. Self-association of 236CDTIPNO in water was proved by solvent- and competition-dependent EPR spectroscopy experiments with 2,6-di-O-Me-beta-cyclodextrin (DIMEB) and permethylated-beta-cyclodextrin (TRIMEB) as external hosts competing for accommodation of the TIPNO moiety. Temperature-dependent EPR spectra were simulated with a novel two-dimensional (field-temperature) EPR simulation program that afforded a full determination of the thermodynamic parameters characterizing the rate constants of the self-inclusion reaction derived from Arrhenius and Eyring models. This method allows separating the line broadening effects due to relaxation from a chemical exchange, even if only the fast exchange regime is accessible experimentally. The activation parameters for the forward and backward steps were consistent with an equilibrium between a nonassociated form and a weakly associated form, with activation free enthalpies for each reaction of around 34 kJ.mol(-)(1).
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Affiliation(s)
- David Bardelang
- UMR 6517 CNRS et Aix-Marseille Université, Avenue Escadrille Normandie-Niemen, Marseille 13397, France
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29
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Morin N, Cornet S, Guinchard C, Rouland JC, Guillaume YC. HPLC RETENTION AND INCLUSION OF IMIDAZOLE DERIVATIVES USING HYDROXYPROPYL-β-CYCLODEXTRIN AS A MOBILE PHASE ADDITIVE. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-100101485] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- N. Morin
- a Laboratoire de Chimie Physique et Minérale , Faculté de Médecine et de Pharmacie, Place Saint-Jacques, Besançon, Cedex, 25030, France
| | - S. Cornet
- b Laboratoire de Chimie Analytique , Faculté de Médecine et de Pharmacie, Place Saint-Jacques, Besançon, Cedex, 25030, France
| | | | | | - Y. C. Guillaume
- b Laboratoire de Chimie Analytique , Faculté de Médecine et de Pharmacie, Place Saint-Jacques, Besançon, Cedex, 25030, France
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30
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Wu A, Chen Q, Xia K, Hou T, Shen X, Gao H, Xu X. Investigation on photophysical properties of a substituted 3H-indole-modified β-cyclodextrin. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2006.02.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Tang B, Liang HL, Tong LL, Li P. Synthesis of ethylenediamine linked β-cyclodextrin dimer and its analytical application for tranilast determination by spectrofluorimetry. Bioorg Med Chem 2006; 14:3947-52. [PMID: 16564175 DOI: 10.1016/j.bmc.2006.01.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2005] [Revised: 01/19/2006] [Accepted: 01/20/2006] [Indexed: 12/17/2022]
Abstract
A synthesis of beta-cyclodextrin (beta-CD) dimer, containing two beta-CD moieties that are linked through their sides by ethylenediamine, was presented. The dimer was characterized by means of IR, (1)H NMR, (13)C NMR, and elemental analysis. The inclusion complexation behavior of beta-cyclodextrin dimer with tranilast was studied in an aqueous KH(2)PO(4)-citric acid buffer solution of pH 2.00 at room temperature by spectrofluorimetry. Based on the significant enhancement of fluorescence intensity of tranilast, a spectrofluorimetric method with high sensitivity and selectivity was developed for the determination of tranilast in bulk aqueous solution in the presence of ethylenediamine beta-CD dimer. The apparent association constant of the complex was 8.39 x 10(3) L mol(-1), and the linear range was 10.8-1.40 x 10(4) ng mL(-1) with the detection limit 3.2 ng mL(-1). There was no interference from the excipients normally used in tablets and serum constituents. The proposed method was successfully applied to the determination of tranilast in serum.
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Affiliation(s)
- Bo Tang
- College of Chemistry, Chemical Engineer and Materials Science, Shandong Normal University, Jinan 250014, Shandong Province, PR China.
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32
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Cyclodextrin-Based Supramolecular Polymers. SUPRAMOLECULAR POLYMERS POLYMERIC BETAINS OLIGOMERS 2006. [DOI: 10.1007/12_056] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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33
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MIYAWAKI A, MIYAUCHI M, TAKASHIMA Y, YAMAGUCHI H, HARADA A. Formation of Chiral Supramolecular Polymer Based on Modified Cyclodextrin by Host-Guest Interactions. KOBUNSHI RONBUNSHU 2006. [DOI: 10.1295/koron.63.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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An improved synthesis of disulfides linked β-cyclodextrin dimer and its analytical application for dequalinium chloride determination by spectrofluorimetry. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.08.048] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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35
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Wright PJ, Bohne C. A temperature-annealing effect on the hostguest complexation with γ-cyclodextrin. CAN J CHEM 2005. [DOI: 10.1139/v05-159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Pyrene binds to γ-cyclodextrin and forms hostguest complexes with different stoichiometries. The fluorescence of pyrene was employed as a qualitative signature for these different complexes. Solutions prepared at room temperature were shown not to be in thermodynamic equilibrium, since a heating cycle of 20 min at 80 °C followed by cooling led to changes in the relative concentrations of the pyreneγ-cyclodextrin complexes. This temperature-annealing effect has consequences when determining thermodynamic parameters such as equilibrium constants and hostguest stoichiometries. Key words: cyclodextrin, pyrene, aggregates, fluorescence.
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36
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Molecular Recognition Thermodynamics of Steroids by Novel Oligo(aminoethylamino)-?-cyclodextrins Bearing Anthryl: Enhanced Molecular Binding Ability by Co-inclusion Complexation. J INCL PHENOM MACRO 2004. [DOI: 10.1007/s10847-003-8826-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Liu Y, Zhao YL, Yang EC, Zhang HY. Molecular Recognition Thermodynamics of Steroids by Novel Oligo(aminoethylamino)-?-cyclodextrins Bearing Anthryl: Enhanced Molecular Binding Ability by Co-inclusion Complexation. J INCL PHENOM MACRO 2004. [DOI: 10.1007/s10847-004-8826-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Liu Y, Yang YW, Cao R, Song SH, Zhang HY, Wang LH. Thermodynamic Origin of Molecular Selective Binding of Bile Salts by Aminated β-Cyclodextrins. J Phys Chem B 2003. [DOI: 10.1021/jp036366q] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Ying-Wei Yang
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Rui Cao
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Shi-Hui Song
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Heng-Yi Zhang
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Li-Hua Wang
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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39
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Liu Y, Fan Z, Zhang HY, Yang YW, Ding F, Liu SX, Wu X, Wada T, Inoue Y. Supramolecular Self-Assemblies of β-Cyclodextrins with Aromatic Tethers: Factors Governing the Helical Columnar versus Linear Channel Superstructures. J Org Chem 2003; 68:8345-52. [PMID: 14575456 DOI: 10.1021/jo034632q] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of 6-O-(p-substituted phenyl)-modified beta-cyclodextrin derivatives, i.e., 6-O-(4-bromophenyl)-beta-CD (1), 6-O-(4-nitrophenyl)-beta-CD (2), 6-O-(4-formylphenyl)-beta-CD (3), 6-phenylselenyl-6-deoxy-beta-CD (4), and 6-O-(4-hydroxybenzoyl)-beta-CD (5), were synthesized, and their inclusion complexation behavior in aqueous solution and self-assembling behavior in the solid state were comparatively studied by NMR spectroscopy, microcalorimetry, crystallography, and scanning tunneling microscopy. Interestingly, (seleno)ethers 1-4 and ester 5 displayed distinctly different self-assembling behavior in the solid state, affording a successively threading head-to-tail polymeric helical structure for the (seleno)ethers or a mutually penetrating tail-to-tail dimeric columnar channel structure for the ester. Combining the present and previous structures reported for the relevant beta-CD derivatives, we further deduce that the pivot heteroatom, through which the aromatic substituent is tethered to beta-CD, plays a critical role in determining the helix structure, endowing the 2-fold and 4-fold axes to the N/O- and S/Se-pivoted beta-CD aggregates, respectively. This means that one can control the self-assembling orientation, alignment, and helicity in the solid state by finely tuning the pivot atom and the tether length. Further NMR and calorimetric studies on the self-assembling behavior in aqueous solution revealed that the dimerization step is the key to the formation of linear polymeric supramolecular architecture, which is driven by favorable entropic contributions.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organtic Chemistry, Nankai University, Tianjin 300071, PR China.
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40
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Park JW, Song HE, Lee SY. Homodimerization and heteroassociation of 6-O-(2-sulfonato-6-naphthyl)-gamma-cyclodextrin and 6-deoxy-(pyrene-1-carboxamido)-beta-cyclodextrin. J Org Chem 2003; 68:7071-6. [PMID: 12946151 DOI: 10.1021/jo034623h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
6-O-(2-sulfonato-6-naphthyl)-gamma-cyclodextrin (1) and 6-deoxy-(pyrene-1-carboxamido)-beta-cyclodextrin (2) were prepared. Homodimerizations of 1 and 2 and heteroassociation between 1 and 2 were investigated by (1)H NMR, circular dichroism, and fluorescence spectroscopic methods. The compounds 1 and 2 form head-to-head dimers with dimerization constants of 140 +/- 50 and 270 +/- 70 M(-)(1), respectively. We also determined the association constants of 1 with beta-CD as 270 +/- 20 M(-)(1) and 2 with gamma-CD as 100 +/- 30 M(-)(1) from fluorescence and circular dichroism titration data, respectively. The heteroassociation between 1 and 2 was manifested in increased circular dichroism ellipticities of 2, downfield shift of the H-2 proton of the pyrene group of 2, and upfield shift of the H-5 proton of the naphthyl group of 1 upon mixing 1 and 2. The analysis of circular dichroism titration data of 2 with 1 gave the association constant as 9300 +/- 1600 M(-)(1). The NMR and circular dichroism spectra suggested that the naphthyl group of 1 is deeply included into the beta-CD cavity of 2, while the pyrene group of 2 is partially inserted in the gamma-CD cavity of 1 in the complex. The energy-minimized structure from molecular modeling of the complex supports this. We believe that the facile heteroassociation of two cyclodextrin derivatives having different sizes of cavity and pendant group could be utilized as a useful strategy for assembling functionalized CDs for various applications.
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Affiliation(s)
- Joon Woo Park
- Department of Chemistry, Ewha Womans University, Seoul 120-750, Korea.
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41
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Fukuhara G, Fujimoto T, Kaneda T. Synthesis and Characterization of the First Pair of an Unlocked and a Locked Self-inclusion Complex from a Permethylated α-Cyclodextrin Derivative. CHEM LETT 2003. [DOI: 10.1246/cl.2003.536] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Liu Y, Fan Z, Zhang HY, Diao CH. Binding ability and self-assembly behavior of linear polymeric supramolecules formed by modified beta-cyclodextrin. Org Lett 2003; 5:251-4. [PMID: 12556164 DOI: 10.1021/ol027146i] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[structure: see text] The binding ability and self-assembly behavior of molecular interpenetration by newly synthesized mono[6-O-(4-formyl-phenyl)-beta-cyclodextrin has been investigated, revealing the formation mechanism of modified cyclodextrin from solution aggregation to solid linear polymeric supramolecules.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P R China.
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43
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Park JW, Song HE, Lee SY. Facile Dimerization and Circular Dichroism Characteristics of 6-O-(2-Sulfonato-6-naphthyl)-β-cyclodextrin. J Phys Chem B 2002. [DOI: 10.1021/jp014191j] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joon Woo Park
- Department of Chemistry, Ewha Womans University, Seoul 120-750, Korea
| | - Hee Eun Song
- Department of Chemistry, Ewha Womans University, Seoul 120-750, Korea
| | - Soo Yeon Lee
- Department of Chemistry, Ewha Womans University, Seoul 120-750, Korea
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44
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Li DB, Ng SC, Novak I. Synthesis and intramolecular inclusion of β-cyclodextrins linked with a cyclohexyl group. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00019-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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45
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Hoshino T, Miyauchi M, Kawaguchi Y, Yamaguchi H, Harada A. Daisy Chain Necklace: Tri[2]rotaxane Containing Cyclodextrins. J Am Chem Soc 2000. [DOI: 10.1021/ja0018264] [Citation(s) in RCA: 141] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Taiki Hoshino
- Department of Macromolecular Science Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan
| | - Masahiko Miyauchi
- Department of Macromolecular Science Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan
| | - Yoshinori Kawaguchi
- Department of Macromolecular Science Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan
| | - Hiroyasu Yamaguchi
- Department of Macromolecular Science Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan
| | - Akira Harada
- Department of Macromolecular Science Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan
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46
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Liu Y, You CC, Zhang M, Weng LH, Wada T, Inoue Y. Molecular interpenetration within the columnar structure of crystalline anilino-beta-cyclodextrin. Org Lett 2000; 2:2761-3. [PMID: 10964359 DOI: 10.1021/ol000135+] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A single crystal of mono(6-anilino-6-deoxy)-beta-cyclodextrin was prepared, and its crystal structure was determined by X-ray crystallographic analysis, which clearly revealed that the anilino groups are consecutively included intermolecularly into the adjacent cyclodextrin cavities in the crystal, thus giving rise to a consolidated column, located on a 2(1)-screw axis.
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Affiliation(s)
- Y Liu
- Department of Chemistry, Nankai University, Tianjin 300071, China
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47
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Novel ether-linked secondary face-to-face 2-2' and 3-3' beta-cyclodextrin dimers. J Org Chem 2000; 65:2792-6. [PMID: 10808457 DOI: 10.1021/jo9910381] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Peculiarities of the mechanism of retention of imidazole derivatives when using hydroxypropyl-β-cyclodextrin as mobile phase additive. Chromatographia 1999. [DOI: 10.1007/bf02466914] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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