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  • 1
    Publication Date: 1984-05-01
    Print ISSN: 0022-3263
    Electronic ISSN: 1520-6904
    Topics: Chemistry and Pharmacology
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  • 2
    Publication Date: 1985-03-01
    Print ISSN: 0001-4842
    Electronic ISSN: 1520-4898
    Topics: Chemistry and Pharmacology
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Accounts of chemical research 18 (1985), S. 65-72 
    ISSN: 1520-4898
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 1 (1983), S. 175-179 
    ISSN: 1573-1111
    Keywords: Inclusion ; clathrate ; clathrand ; host/guest ; X-ray analysis ; onium compounds ; azulene derivative
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The X-ray structure of the 1,4-butanediol clathrate ofN,N′-[1,3-azulenylenebis(methylene)]bis(trimethyl-ammonium)-diiodide is described, and the differences as well as the similarities to the 1-butanol inclusion of the same host are discussed in detail. The unit cell data of further clathrates of this new type are quoted.
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  • 6
    ISSN: 1573-1111
    Keywords: Inclusion ; clathrate ; clathrand ; host/guest ; X-ray analysis ; ammonium compounds ; phosphonium compounds ; quinuclidinium derivative
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Organic onium salts (3–15) are prepared and their inclusion capacity towards solvent molecules is investigated. The crystal structure of the1·propanol·H2O clathrate ofN,N′-[5-tert-butyl-1,3-phenylenebis(methylene)]bis(quinuclidinium)dibromide (4) is reported and compared with the X-ray structures of related clathrates described earlier.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 2839-2849 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chromoionophores, 51). Chromoionophores with Azulene Units as Chromophores and π-Donor ComponentsThe synthesis and spectroscopic investigation of a series of new chromoionophores with azulene as chromophore and of suitable reference compounds are described. Cations complexed by the ionophore influence the chromophore, causing downfield shifts in the 1H NMR spectra and ion-selective changes in the absorption spectra. It is concluded that the chromophore can interact with the cations via carboxylic oxygen atoms or directly via the π-electrons of the azulene unit. Crystalline complexes of the azulene ligands 6 and 7 with alkali and alkaline-earth metal salts are synthesized. The geometry of the 7 · KSCN complex is examined by X-ray structure analysis.
    Notes: Synthese und spektroskopische Untersuchung einer Reihe von neuen Chromoionophoren mit Azulen als Farbträger und von geeigneten Vergleichsverbindungen werden beschrieben. Die Beeinflussung des Chromophors durch im Ionophorteil komplexierte Kationen verursacht in Lösung 1H-NMR-Tieffeldverschiebungen und ionenselektive Veränderungen in den Elektronenspektren. Daraus wird gefolgert, daß der Chromophor über Carboxyl-Sauerstoffatome oder direkt über die π-Elektronen des Azulens mit den Kationen in Wechselwirkung treten. Kristalline Komplexe der Azulen-Liganden mit Alkali- und Erdalkalimetallsalzen werden hergestellt. Die Geometrie des 7 · KSCN-Komplexes wird durch Röntgenstrukturanalyse ermittelt.
    Additional Material: 5 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1487-1496 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Inclusion Compounds of Organic Onium Salts, IV1). Organyl Ammonium Hosts as Versatile Clathrate FormersThe organyl-oligo-ammonium compounds 1 - 25 and their clathrates with a variety of low molecular weight neutral compounds, especially solvent molecules, are prepared. The inclusion capacity of the new clathrands can be explained by interstices in the host lattice. The conformational flexibility of the voluminous onium branches is responsible for the great number of clathrates; their stability depends on the ion lattice. The X-ray analysis of the ethanol clathrate of the onium host 8 shows that one ethanol molecule is surrounded by the host molecules in a cage-type manner. The great variety of the inclusions obtained up to now demonstrates that the oligo onium host compounds have to be considered as the most universal clathrands of organic chemistry. Hints are given for the syntheses of new onium clathrates.
    Notes: Die Organyl-oligo-ammonium-Verbindungen 1 - 25 und ihre Clathrate mit zahlreichen nieder-molekularen Neutralsubstanzen, insbesondere Lösungsmittelmolekülen, .werden dargestellt. Das Einschlußvermögen der neuen Clathranden wird auf Lücken im Wirtgitter zurückgeführt; die Vielfalt der Clathrate wird durch die konformative Beweglichkeit der voluminösen Onium-Seitenarme ermöglicht. Die Stabilität der Einschlüsse basiert auf dem ionischen Aufbau des Wirtgitters. Die Röntgenstrukturanalyse des Ethanol-Clathrats des Onium-Wirts 8 ergibt, daß in Ethanolmolekül von den Wirtmolekülen käfigartig umgeben ist. Die Vielzahl der bisher erhaltenen Einschlüsse zeigt, daß die (Oligo-)Onium-Wirtverbindungen zu den universellsten Clathranden der organischen Chemie gezählt werden müssen. Die Arbeit gibt Hinweise zur Synthese neuer Onium-Clathrate.
    Additional Material: 1 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 914-921 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chromoionophores, VII. Podands Carrying Terminal Electron-Donor- and -Acceptor Groups. Cation-Influenced Charge Transfer AbsorptionThe synthesis and spectroscopic investigation of the new noncyclic neutral ligands 12-20 of the glycol ether type (podands) carrying terminal electron-donor- and -acceptor groups are described. The podands show intramolecular charge transfer interactions which can be influenced selectively by complexed cations. The ligands 13 and 20 cause significant increases of extinction and bathochromic shifts of the charge transfer bands in the UV/Vis spectra on addition of alkali perchlorates, whereas the shorter ligands 14 and 18 show a decrease of extinction and hypsochromic shifts under similar conditions. Some of the noncyclic chromoionophores discern considerably and visually perceivably between Na+ and K+ or Li+ and Na+, respectively, in acetonitrile. The cation selective alterations in the electron spectra are discussed in view of steric effects considering some complex stability constants determined by photometric titrations.
    Notes: Synthese und spektroskopische Untersuchung der neuen nichtcyclischen Neutralliganden 12-20 von Glycolether-Typ (Podanden) mit Elektronen-Donor- und -Acceptor-Endgruppen werden beschrieben. Die Podanden zeigen intramolekulare Charge-Transfer-Wechselwirkungen, die durch komplexierte Kationen selektiv beeinflußt werden. Während bei den Liganden 13 und 20 mit Alkalimetallperchloraten signifikante Extinktionszunahmen und bathochrome Verschiebungen der Charge-Transfer-Banden in den UV/Vis-Spektren auftreten, beobachtet man bei den kürzerkettigen Liganden 14 und 18 unter analogen Bedingungen Extinktionsverminderung und Hypsochromie. Einige der offenkettigen Chromoionophore differenzieren in Acetonitril stark und visuell gut wahrnehmbar zwischen Na+ und K+ bzw. Li+ und Na+. Die kationselektiven Veränderungen in den Elektronenspektren der Chromoionophore werden, unter Berücksichtigung einiger durch photometrische Titration ermittelter Komplexkonstanten, im Hinblick auf sterische Effekte bei der Komplexierung erörtert.
    Additional Material: 2 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 905-913 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chromoionophores, VI. New Chromoionophores with Azulene Units and High Color Selectivity for Ba2+ IonsThe neutral ligand 2b in solution (acetonitrile) shows a color change from yellowish-orange to blueish-violet on addition of barium salts. Relatively little alterations of color from orange up to red are effected by other alkali and alkaline earth metal salts. The syntheses, spectroscopic investigations, and cation selectivities of the new 6-aminoazulene coronands 2a, b and 3 are described. The band shifts in the absorption spectra are discussed in view of dipole moment changes of the azulene system proceeding from the ground- to the photoexcited state.
    Notes: Der Neutralligand 2b zeigt in Lösung (Acetonitril) auf Zugabe von Bariumsalzen einen Farbumschlag von gelborange nach blauviolett, während er mit anderen Alkali- und Erdalkalimetallsalzen nur vergleichsweise geringe Farbänderungen nach orange bis rot bewirkt. Synthesen, spektroskopische Untersuchungen und Kationselektivitäten der neuen 6-Aminoazulen-Kronenderivate 2a, b und 3 werden beschrieben. Die Veränderungen der Absorptionsspektren der Liganden bei Salzzusatz werden im Hinblick auf Diplomoment-Änderungen des Azulensystems beim Übergang vom Grund- zum photoangeregten Zustand erörtert.
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