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Ikai T, Kawabata S, Mamiya F, Taura D, Ousaka N, Yashima E. Helix-Sense-Selective Encapsulation of Helical Poly(lactic acid)s within a Helical Cavity of Syndiotactic Poly(methyl methacrylate) with Helicity Memory. J Am Chem Soc 2020; 142:21913-21925. [PMID: 33315394 DOI: 10.1021/jacs.0c11204] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report a highly enantio- and helix-sense-selective encapsulation of helical poly(lactic acid)s (PLAs) through a unique "helix-in-helix" superstructure formation within the helical cavity of syndiotactic poly(methyl methacrylate) (st-PMMA) with a one-handed helicity memory, which enables the separation of the enantiomeric helices of the left (M)- and right (P)-handed-PLAs. The M- and P-helical PLAs with different molar masses and a narrow molar mass distribution were prepared by the ring-opening living polymerization of the optically pure l- and d-lactides, respectively, followed by end-capping of the terminal residues of the PLAs with a 4-halobenzoate and then a C60 unit, giving the C60-free and C60-bound M- and P-PLAs. The C60-free and C60-bound M- and P-PLAs formed crystalline inclusion complexes with achiral st-PMMA accompanied by a preferred-handed helix induction in the st-PMMA backbone, thereby producing helix-in-helix superstructures with the same-handedness to each other. The induced helical st-PMMAs were retained after replacement with the achiral C60, indicating the memory of the induced helicity of the st-PMMAs. Both the C60-free and C60-bound helical PLAs were enantio- and helix-sense selectively encapsulated into the helical hollow space of the optically active M- and P-st-PMMAs with the helicity memory prepared using chiral amines. The M- and P-PLAs are preferentially encapsulated within the M- and P-st-PMMA helical cavity with the same-handedness to each other, respectively, independent of the terminal units. The C60-bound PLAs were more efficiently and enantioselectively trapped in the st-PMMA compared to the C60-free PLAs. The enantioselectivities were highly dependent on the molar mass of the C60-bound and C60-free PLAs and significantly increased as the molar mass of the PLAs increased.
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Affiliation(s)
- Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Satoshi Kawabata
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Fumihiko Mamiya
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Naoki Ousaka
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
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Kawauchi T, Ohnishi K, Kajihara K, Kawauchi M, Takeichi T. Polymer Alloying of Helical Syndiotactic PMMA with [60]Fullerene-End-Capped Polymers through Inclusion Complex Formation of the Helical Cavity with Fullerene Units. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00755] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takehiro Kawauchi
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Oe-cho, Seta, Otsu, Shiga 520-2194, Japan
| | - Keita Ohnishi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Kouta Kajihara
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Oe-cho, Seta, Otsu, Shiga 520-2194, Japan
| | - Mariko Kawauchi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Tsutomu Takeichi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
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Solubility study of cefpodoxime acid antibiotic in terms of free energy of solution - Insights from polarizable continuum model (PCM) analysis. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.10.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Kawauchi T, Kawauchi M, Kodama Y, Takeichi T. Formation of the Inclusion Complex of Helical Syndiotactic Poly(methyl methacrylate) and Polycyclic Aromatic Hydrocarbons. Macromolecules 2011. [DOI: 10.1021/ma200255m] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Takehiro Kawauchi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Mariko Kawauchi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Yuya Kodama
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Tsutomu Takeichi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan
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Kawauchi T, Kitaura A, Kawauchi M, Takeichi T, Kumaki J, Iida H, Yashima E. Separation of C70 over C60 and Selective Extraction and Resolution of Higher Fullerenes by Syndiotactic Helical Poly(methyl methacrylate). J Am Chem Soc 2010; 132:12191-3. [DOI: 10.1021/ja104969a] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takehiro Kawauchi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
| | - Atsushi Kitaura
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
| | - Mariko Kawauchi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
| | - Tsutomu Takeichi
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
| | - Jiro Kumaki
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
| | - Hiroki Iida
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
| | - Eiji Yashima
- Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
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Yutronic N, Merchán J, Jara P, Manríquez V, Wittke O, González G. Single-crystal Anisotropic Proton Conductivity in the Clathrate of the Hydrogen-diquinuclidine Ion Inserted in a Polyanionic Thiourea–chloride Matrix. Supramol Chem 2007. [DOI: 10.1080/10610270412331286003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- N. Yutronic
- a Departamento de Química, Facultad de Ciencias , Universidad de Chile , Casilla 653, Santiago, Chile
| | - J. Merchán
- a Departamento de Química, Facultad de Ciencias , Universidad de Chile , Casilla 653, Santiago, Chile
| | - P. Jara
- a Departamento de Química, Facultad de Ciencias , Universidad de Chile , Casilla 653, Santiago, Chile
| | - V. Manríquez
- a Departamento de Química, Facultad de Ciencias , Universidad de Chile , Casilla 653, Santiago, Chile
| | - O. Wittke
- b Departamento de Física, Facultad de Ciencias, Físicas y Matemáticas , Universidad de Chile , Casilla, 487-3, Santiago, Chile
| | - G. González
- a Departamento de Química, Facultad de Ciencias , Universidad de Chile , Casilla 653, Santiago, Chile
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Ikeda M, Furusho Y, Okoshi K, Tanahara S, Maeda K, Nishino S, Mori T, Yashima E. A Luminescent Poly(phenylenevinylene)–Amylose Composite with Supramolecular Liquid Crystallinity. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602134] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ikeda M, Furusho Y, Okoshi K, Tanahara S, Maeda K, Nishino S, Mori T, Yashima E. A Luminescent Poly(phenylenevinylene)–Amylose Composite with Supramolecular Liquid Crystallinity. Angew Chem Int Ed Engl 2006; 45:6491-5. [PMID: 16960912 DOI: 10.1002/anie.200602134] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masato Ikeda
- Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), 101 Creation Core Nagoya, Shimoshidami, Nagoya 463-0003, Japan
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Affiliation(s)
| | - Victor Manríquez
- a Department of Chemistry, Faculty of Sciences , Universidad de Chile , Casilla, 653, Santiago de Chile
| | - Paul Jara
- a Department of Chemistry, Faculty of Sciences , Universidad de Chile , Casilla, 653, Santiago de Chile
| | - Oscar Wittke
- b Department of Physics, Faculty of Physical and Mathematical Sciences , Universidad de Chile , Casilla, 487-3, Santiago de Chile
| | - Guillermo González
- a Department of Chemistry, Faculty of Sciences , Universidad de Chile , Casilla, 653, Santiago de Chile
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12
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Affiliation(s)
- Paul Jara
- a Department of Chemistry , Faculty of Sciences, Universidad de Chile , Casilla 653, Santiago , Chile
| | - Nicolás Yutronic
- a Department of Chemistry , Faculty of Sciences, Universidad de Chile , Casilla 653, Santiago , Chile
| | - Guillermo González
- a Department of Chemistry , Faculty of Sciences, Universidad de Chile , Casilla 653, Santiago , Chile
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Mizuno Y, Alam MA, Tsuda A, Kinbara K, Yamaguchi K, Aida T. Hermaphroditic Chirality of aD2-Symmetric Saddle-Shaped Porphyrin in Multicomponent Spontaneous Optical Resolution: Inclusion Cocrystals with Double-Helical Porphyrin Arrays. Angew Chem Int Ed Engl 2006; 45:3786-90. [PMID: 16671146 DOI: 10.1002/anie.200503054] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yukitami Mizuno
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Mizuno Y, Alam MA, Tsuda A, Kinbara K, Yamaguchi K, Aida T. Hermaphroditic Chirality of aD2-Symmetric Saddle-Shaped Porphyrin in Multicomponent Spontaneous Optical Resolution: Inclusion Cocrystals with Double-Helical Porphyrin Arrays. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200503054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Crystal structure of 1,3-diphenyladamantane and trans-1,4-diphenylcyclohexane: torsion angles about C–Ph bonds in α,ω-diphenyl(alicyclic hydrocarbon). J Mol Struct 2003. [DOI: 10.1016/s0022-2860(03)00348-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Breitinger HG. Synthesis and characterization of 2,3-di-O-alkylated amyloses: hydrophobic substitution destabilizes helical conformation. Biopolymers 2003; 69:301-10. [PMID: 12833257 DOI: 10.1002/bip.10384] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Amylose was selectively alkylated in the 2,3-O position of each anhydroglucose unit after trityl protection of the 6-OH groups. Alkyl iodides of varying chain length (C(2), C(5), C(8)) were coupled to amylose, and degrees of substitution (DSs) were varied between 0.3 and 1.8, as assessed by NMR analysis. Increasing amounts of methyl groups per anhydroglucose unit increased solubility in nonaqueous media, while at the same time reducing the ability of modified amylose to form a complex with iodine. The tendency to form inclusion complexes with the surfactant N-dodecyl pyridinium bromide decreased in the order beta-cyclodextrin >> amylose approximately solubilized starch, indicating that the frozen macrocycle of beta-cyclodextrin was the most efficient inclusion host. Introduction of the bulky trityl group abolished the helical amylose conformation, which is not readily reassumed in the presence of hydrophobic substitution of the C2 and C3 positions. These results indicated that a polar outer surface is necessary but not sufficient for the formation of a stable amylose helix.
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Affiliation(s)
- Hans-Georg Breitinger
- Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf.
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18
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Kim S, Bishop R, Craig DC, Dance IG, Scudder ML. Crystal engineering of hydroxy group hydrogen bonding: design and synthesis of new diol lattice inclusion hosts. J Org Chem 2002; 67:3221-30. [PMID: 12003528 DOI: 10.1021/jo010787r] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The diols 7-11 have been synthesized, and their X-ray crystal structures determined, to learn how to influence and control lattice hydroxy group hydrogen bonding using crystal engineering ideas. To obtain new lattice inclusion hosts precise structural rules can be defined which enable the necessary supramolecular interactions to be duplicated. In this manner the helical tubuland 10 and ellipsoidal clathrate 11 hosts were obtained for the first time and their chloroform inclusion compounds characterized. New synthetic routes were utilized to obtain the bicyclo[3.3.2]decane and 9-thiatricyclo[4.3.1.1(3,8)]undecane frameworks present in these compounds. The solid-state conformations of bicyclo[3.3.2]decane derivatives 9 and 10 are compared with prior predictions and studies made on this uncommon ring system.
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Affiliation(s)
- Sungho Kim
- School of Chemistry, The University of New South Wales, Sydney 2052, New South Wales, Australia
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19
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Self-assembly of helical supramolecular channels from chiral aminopyrimidine hydrogen bonding motifs in the solid state. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s1387-1609(00)88565-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Mazik M, Bläser D, Boese R. New helical hydrogen-bonded assemblies forming channel-inclusion complexes. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00802-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Schindler W, Knoch F, Kisch H. Semiconductor-Catalysed Photoaddition: γ,δ-Unsaturated Amines from Cyclopentene and Schiff Bases. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/cber.19961290808] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bishop R, Fowler AL, Craig DC, Scudder ML. AN OCTAPHENYL-SUBSTITUTED BICYCLIC ORGANOMETALLIC INCLUSION HOST. J COORD CHEM 1996. [DOI: 10.1080/00958979608023544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Roger Bishop
- a School of Chemistry, The University of New South Wales , Sydney , 2052 , Australia
| | - Alexandra L. Fowler
- a School of Chemistry, The University of New South Wales , Sydney , 2052 , Australia
| | - Donald C. Craig
- a School of Chemistry, The University of New South Wales , Sydney , 2052 , Australia
| | - Marcia L. Scudder
- a School of Chemistry, The University of New South Wales , Sydney , 2052 , Australia
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23
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Organic zeolites? ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s0167-2991(06)81400-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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24
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Butkus E, Martins JC, Berg U. 1H NMR spectroscopic study of the interaction between cyclodextrins and bicyclo[3.3.1]nonanes. ACTA ACUST UNITED AC 1996. [DOI: 10.1007/bf01053539] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Künneth R, Feldmer C, Knoch F, Kisch H. Semiconductor-Catalysed Photoaddition of Olefins and Enol Ethers to 1,2-Diazenes: A New Route to Allylhydrazines. Chemistry 1995. [DOI: 10.1002/chem.19950010709] [Citation(s) in RCA: 41] [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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26
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Jara P, Yutronic N, Gonz�lez G. Synthesis and structural aspects of urea/dialkylamine inclusion compounds. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf00707083] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Bishop R, Craig DC, Scudder ML, Marchand AP, Liu Z. Disorder versus symmetry in the helical tubuland inclusion host lattice—a successful trishomocubyl diol probe. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/p29950001295] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Subramanian S, Zaworotko MJ. Exploitation of the hydrogen bond: recent developments in the context of crystal engineering. Coord Chem Rev 1994. [DOI: 10.1016/0010-8545(94)03008-e] [Citation(s) in RCA: 348] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Downing GA, Frampton CS, MacNicol DD, Mallinson PR. Trigonale Symmetrie als Element zum Design von Wirtmolekülen; die Konformation von Dodecakis(3,5-dimethylphenylthio)coronen im Addukt mit 1,4-Dioxan. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941061509] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Gizachew D, Van Gorkom LC, Dance IG, Hanna JV, Wilson MA. Cross-polarization dynamics in 2,6-dimethylbicyclo[3.3.1]nonane-exo-2-exo-6-diol inclusion compounds as studied by 13C magic-angle spinning nuclear magnetic resonance spectroscopy. SOLID STATE NUCLEAR MAGNETIC RESONANCE 1994; 3:67-78. [PMID: 7834315 DOI: 10.1016/0926-2040(94)90025-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Solid-state 13C nuclear magnetic resonance (NMR) spectra of a number of inclusion compounds of 2,6-dimethyl-bicyclo[3.3.1]nonane-exo-2-exo-6-diol (host) with small organic small molecules (guests) have been studied. With 3,4-dichloro-1,2,5-thiadiazole and tetrachloroethylene as guests, line splittings of the host resonances were observed due to the location of the guest in the host lattice. The cross-polarization (CP) dynamics of these inclusion compounds have been studied and shown to be indicative of weakly coupled systems. As expected, the proton spin lattice relaxation times in the rotating frame (T1pH) of the host are increased by the presence of rapidly moving guest because the efficiency of homonuclear dipolar relaxation in the rotating frame is reduced. However, strong transient oscillations were also observed for the guest molecules during the Hartmann-Hahn transfer of magnetisation from the more abundant 1H spins to the 13C spins during spin lattice rotating frame relaxation. These oscillations were found to be greatest for carbons with largest chemical shift anisotropies.
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Affiliation(s)
- D Gizachew
- School of Chemistry, University of New South Wales, Kensington, Australia
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32
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Li Q, Mak TCW. Inclusion compounds of thiourea and peralkylated ammonium salts. Part II. Hydrogen-bonded host lattices built of thiourea and cyclic dimeric bicarbonate moieties. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/bf00707613] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Ung AT, Bishop R, Craig DC, Dance IG, Scudder ML. Crystal engineering: helical tubuland diol–phenol cocrystals. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/c39930000322] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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35
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36
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Geib SJ, Vicent C, Fan E, Hamilton AD. Selbstorganisation zu einer Helix durch Wasserstoffbrückenbindungen. Angew Chem Int Ed Engl 1993. [DOI: 10.1002/ange.19931050115] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Ung AT, Bishop R, Craig DC, Dance IG, Scudder ML. Guest control of diol inclusion host lattices. Struct Chem 1992. [DOI: 10.1007/bf00671980] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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