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  • 1
    Electronic Resource
    Electronic Resource
    Carbon Number Dependence of the Intercalation and Interlayer Amidation Properties of .alpha.,.omega.-Alkylidiamines for Layered Zirconium (Carboxyethyl)phosphonate (1994)
    s.l. : American Chemical Society
    Inorganic chemistry 33 (1994), S. 2586-2591 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00090a018
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  • 2
    Electronic Resource
    Electronic Resource
    Complexation of copper(II)-montmorillonite with a modified cyclodextrin (1984)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 2 (1984), S. 807-813 
    Details
    ISSN: 1573-1111
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The uptake reaction of Cu(II)-montmorillonite with mono-(6-β-aminoethylamino-6-deoxy)-β-cyclodextrin (CDen) has been examined at 25°C. The CDen molecules in their neutral or cationic forms are taken up by forming complexes with the interlayer Cu(II) ions (Cuint) and by displacing protons at the clay surface. At low uptakes of CDen, 1∶1 complexes of CDen with Cuint are intercalated as a monolayer of 13.7 Å in thickness, with their opening faces parallel to the interlayer surface. At higher contents, the CDen-Cuint complexes are more voluminously packed to form two intercalated phases with larger spacings until a bilayer of 23.9 Å in thickness is formed. The uptake by the mode of ion exchange proceeds increasingly at the intermediate uptake stage. At higher levels, however, this additional uptake is decreased rapidly due to the increase in the pH of solution, resulting in a maximum in the curve of CDen uptake against CDen added.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00662249
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  • 3
    Electronic Resource
    Electronic Resource
    A complex of copper (II)-montmorillonite with a modified cyclodextrin (1984)
    [s.l.] : Nature Publishing Group
    Nature 310 (1984), S. 45-47 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cyclodextrins are cyclic oligosaccharides of D-glucopyranose. The CDen used in this study is a derivative of -cyclodextrin, in which the 1,2-diaminoethane group is attached to a primary alcohol group on the narrow side of the truncated cone-shaped cyclodextrin molecule. The cyclic dextrins and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/310045a0
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  • 4
    Electronic Resource
    Electronic Resource
    A Complex of copper (II)-montmorillonite with a modified cyclodextrin (reply) (1985)
    [s.l.] : Nature Publishing Group
    Nature 316 (1985), S. 280-280 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] KIJIMA ETAL. REPLY?We admit that we have misinterpreted the electron spin resonance (ESR) spectra given in Fig. 2 of our paper. It is true that these spectra are indicative of a random orientation of the adsorbed Cu(n) complexes rather than a spatial organization, as pointed out by Motschi. This ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/316280b0
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  • 5
    Electronic Resource
    Electronic Resource
    A new type of host compound consisting of α -zirconium phosphate and an animated cyclodextrin (1986)
    [s.l.] : Nature Publishing Group
    Nature 322 (1986), S. 533-534 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cyclodextrins contain a cylindrical cavity capable of including a variety of molecules, together with catalytically active hydroxyl groups. The cyclic dextrins and their derivatives therefore serve as micro-encapsulating agents for drugs or as models of enzymes5. Zirconium phosphate is an inorganic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/322533a0
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  • 6
    Electronic Resource
    Electronic Resource
    Inclusion behaviour of benzoic acid towards intercalates of α- and γ-zirconium hydrogen phosphates with 2-aminopropylamino-substituted β-cyclodextrin (1990)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 9 (1990), S. 171-178 
    Details
    ISSN: 1573-1111
    Keywords: Zirconium phosphates ; cyclodextrin ; intercalates ; benzoic acid ; inclusion compound
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The inclusion behaviour of benzoic acid towards intercalates of α- and γ-zirconium hydrogen phosphates with mono[6-(2-aminopropylamino)-6-deoxy]-β-cyclodextrin (CDpn) has been studied at 25°C. Both intercalates take up benzoic acid to form a complex, with an accompanying partial release of CDpn. It is concluded that the remaining CDpn molecules in the α-complex are rearranged as a bilayer with their cavity axes perpendicular to the phosphate layers. Those in the γ-complex act as a molecular prop to maintain the initial structure in which the CDpn molecules are arranged as a bilayer with their cavity axes parallel to the phosphate layers. The benzoic acid molecules are embedded inside and outside the CDpn cavity. The pore volume between the CDpn molecules amounts to approximately 0.07 and 0.29 cm3 per gram of the α- and γ-complexes, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01041261
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  • 7
    Electronic Resource
    Electronic Resource
    Complexation of Na-, Ca-, and Cu-montmorillonites with some parent and methylated cyclodextrins (1986)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 4 (1986), S. 333-338 
    Details
    ISSN: 1573-1111
    Keywords: Cyclodextrin ; montmorillonite ; complexation ; complex ; intercalation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The uptake of α-, β-, γ-, hexakis-2,6-di-O-methyl-α-(DM-α-), heptakis-2,6-di-O-methyl-β-(DM-β-) and heptakis-2,3,6-tri-O-methyl-β- (TM-β-) cyclodextrins (CD's) by Na-, Ca-, and Cu-montmorillonites has been studied at 25°C. Each of α-, DM-α-, DM-β-, and TM-β-CD's forms a complex with all of these montmorillonites in which the guest molecules are arranged as a monolayer with their open faces parallel to the silicate sheet of montmorillonite. On the other hand, γ-CD is intercalated only by the Na form and β-CD cannot be taken up by any of the clays used. The interlayer spacing of the α-CD complex varies from 18.0 to 21.5 Å with replacement of the interlayer cation, but those of the methylated α-and β-CD complexes remain unchanged, beingca. 21 and 18 Å, respectively. The different behaviour of the parent and methylated CD's is explained in terms of the structural and physicochemical characteristics of the individual CD's and interlayer cations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656160
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  • 8
    Electronic Resource
    Electronic Resource
    Complexes of Na-, Ca-, and Zn-montmorillonites with an aminated cyclodextrin (1987)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 5 (1987), S. 469-472 
    Details
    ISSN: 1573-1111
    Keywords: Montmorillonite ; aminated cyclodextrin ; intercalation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The uptake of mono-(6-β-aminoethylamino-6-deoxy)-β-cyclodextrin (CDen) by Na-, Ca- and Zn-montmorillonites has been examined at 25°C. Each of the first two minerals forms only one intercalated phase in which the CDen molecules are intercalated as a monolayer, while the third yields a mixture of two intercalated phases whose interlayer spaces are occupied by mono- and bilayers of the guest molecules. Intercalation proceeds by ion exchange with the interlayer cations for the Na-complex and by forming metalaminoethylamino chelate complexes for the others.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00664104
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  • 9
    Electronic Resource
    Electronic Resource
    Aluminium-Based Surfactant Mesophases Structurally and Morphologically Controlled by Anions (1998)
    Springer
    Journal of porous materials 5 (1998), S. 133-138 
    Details
    ISSN: 1573-4854
    Keywords: alumina ; hexagonal structure ; anions ; alumina mesophase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Aluminium-based dodecyl sulfate mesophases were synthesized by the homogeneous precipitation from a mixture of aluminium nitrate, sodium dodecyl sulfate, urea and water with or without five kinds of additional anions. The addition of monovalent Cl-, CH3COO- and HCOO- anions yielded a hexagonal mesophase, whereas F- anions induced a different mesophase. The crystallinities of these mesophases increased in the following order: NO3 - and Cl-〉CH3 COO-〉HCOO-〉F-, corresponding to the reverse order of affinity for Al3+. The resulting mesophases were also largely affected in morphology by the anion species added to form worm-like shaped particles for NO3 - and/or Cl- anions, and widely varying shapes of particles for the others. On calcination, these mesophases were transformed into α-alumina particles with macro pores having the specific surface area of ca. 20 m2ċg-1. On the other hand, the addition of divalent SO4 2- anions or the single use of aluminium sulfate led to a mesophase with a structural period as long as 6 nm, which was deorganized into a layered phase with an interlayer spacing of 1.4 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009697421580
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