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  • 1
    Electronic Resource
    Electronic Resource
    Tangentially Coupled π Systems and their Through-Space Interaction - trichromophoric perylene dyes (1996)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 338 (1996), S. 654-659 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Three perylene tetracarboxylic bisimide chromophores have been attached to a benzene ring in m-position (3). In this way steric and through-bond interactions of the chromophores are minimized and their through-space-interactions can be studied for which an unusually high bathochromic shift has been found. This indicates a destabilization. No exciton coupling has been observed in the trichromophoric dyes.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.199633801124
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  • 2
    Electronic Resource
    Electronic Resource
    Balanced Decarboxylation of Aromatic Polyacids - A One-Step Synthesis of Perylene-3,4-dicarboxylic Anhydride (1997)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1997 (1997), S. 467-468 
    Details
    ISSN: 0947-3440
    Keywords: Decarboxylation ; Carboxylic acids ; Fluorescence spectroscopy ; Perylenes ; Heterocycles ; Dyes ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Perylene-3,4-dicarboxylic anhydride (3) is prepared from technical grade perylene-3,4:9,10-tetracarboxylic anhydride (1) in 25% yield by a partial decarboxylation reaction using noncondensing amines. Perylene-3-carboxylic acid (4) and perylene-3,4-dicarboxylic imide (5) are prepared in the same way in yields of 24% and 76%, respectively, by a variation of the reaction conditions.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199719970305
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  • 3
    Electronic Resource
    Electronic Resource
    Perylenamidine-imide dyes (1995)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1995 (1995), S. 481-486 
    Details
    ISSN: 0947-3440
    Keywords: Dyes, fluorescent ; Perylene derivatives ; Heterocyclic rings ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Perylene-3,4:9,10-tetracarboxylic acid 3,4-anhydride-9,10-imides are condensed with primary diamines to a number of new basic chromophores with amidine-imide structures. Lightfast dyes are obtained which exhibit a strong fluorescence in solution. The absorption and fluorescence spectra of the title compounds are bathochromically shifted compared to those of the perylene dyes.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199519950366
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  • 4
    Electronic Resource
    Electronic Resource
    Eine einfache Synthese von TetramethyloxamidKarl Dimroth zum 70. Geburtstag gewidmet. (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 1015-1017 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Simple Synthesis of TetramethyloxamideTetramethyloxamide has been prepared by a new and simple procedure from dimethylformamide, iron(II) sulfate heptahydrate, and tert-butyl hydroperoxide (yield 43%) or 30% aqueous hydroperoxide (yield 77%).
    Notes: Es wird eine neue, einfache Synthese von Tetramethyloxamid aus Dimethylformamid, Eisen(II)-sulfat-heptahydrat und tert-Butylhydroperoxid (Ausb. 43%) oder 30proz. Wasserstoffperoxid (Ausb. 77%) beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810606
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  • 5
    Electronic Resource
    Electronic Resource
    Eine einfache Synthese von α-Styrylenolethern und Arylacetaldehyden aus Benzylalkoholen (1982)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 2216-2222 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Uncomplicated Synthesis of α-Styrylenol Ethers and Arylacetaldehydes from Benzyl AlcoholsThe reaction of benzyl alcohol with potassium hydroxide in dimethyl sulfoxide yielding (E)-β-(benzyloxy)styrene is described. The mechanism proposed for this reaction was studied by isotope labelling and by introduction of probable intermediates. The reaction is generalized as a preparative method for the synthesis of either arylacetaldehydes or their enol ethers from aromatic aldehydes.
    Notes: Die Umsetzung von Benzylalkohol in Dimethylsulfoxid mit Kaliumhydroxid unter Bildung von (E)-β-(Benzyloxy)styrol (1a) wird beschrieben. Für diese Reaktion wird ein Mechanismus vorgeschlagen, der durch Isotopenmarkierung und Einsatz von Zwischenstufen belegt wird. Die Reaktion wird zu einer präparativen Methode für die Homologisierung aromatischer Aldehyde zu Aryl-acetaldehyden bzw. ihren Enolethern ausgebaut.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198219821211
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  • 6
    Electronic Resource
    Electronic Resource
    Eine einfache neue Synthese der Fusarinsäure und anderer 5-Alkyl-2-pyridincarbonsäuren (1982)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 930-949 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Simple Synthesis of Fusaric Acid and Other 5-Alkyl-2-pyridinecarboxylic AcidsCarboxamido groups are introduced into the 6-position of 3-acylpyridines with high regioselectivity via Minisci reaction with formamides, Fe(II) sulfate and tert-butul hydroperoxide. The isolation procedure is considerably improved by the addition of citric acid for complexation of the Fe ions. Fusaric acid and other 5-alkyl-2-pyridine carboxylic acids are obtained by a following Wolff-Kishner reaction in 20-75% overall yield.
    Notes: In 3-Acylpyridine läßt sich durch Minisci-Reaktion mit Formamiden, Fe(II)-sulfat und tert-Butylhydroperoxid gezielt in die 6-Position eine Carboxamidgruppe einführen. Die Aufarbeitung wird durch Zugabe von Citronensäure als Komplexbildner für Eisenionen wesentlich verbessert. Durch anschließende Wolff-Kishner-Reduktion erhält man direkt Fusarinsäure und andere 5-Alkyl-2-pyridincarbonsäuren in 20-75% Ausbeute über beide Schritte.
    Additional Material: 9 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198219820513
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of Readily Soluble Tetraazaviolanthrone and -isoviolanthrone fluorescent dyes (1997)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 339 (1997), S. 597-602 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Readily soluble, photostable and highly red fluorescent dyes (3-5) have been obtained from a condensation of perylenetetracarboxylic bisanhydride with primary aliphatic 1,3-diamines containing two geminal long-chain alkyl groups. Analogous red fluorescing dyes have been prepared by the condensation of a corresponding perylene anhydride imide.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.199733901107
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  • 8
    Electronic Resource
    Electronic Resource
    Pyrrolo- and Thiophenoperylenedicarboximides - Highly Fluorescent Heterocycles (1996)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1996 (1996), S. 1587-1591 
    Details
    ISSN: 0947-3440
    Keywords: Perylenes ; Heterocycles ; Fluorescent dyes ; Fluorescent labelling ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Pyrrolo- and thiophenoperylenedicarboximides 4 and 7 were prepared by reductive cyclization of 1-nitroperylenedicarboximides 3 and 5 with phosphorous acid esters and sulfur, respectively. The imides 4 and 7 are highly fluorescent and are easily monofunctionalized by nucleophilic substitution reactions which makes them useful for fluorescent labeling.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199619961014
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis of perylene-3,4-dicarboximides  -  Novel highly photostable fluorescent dyesDedicated to Prof. Dr. Christoph Rüchardt on the occasion of his 65th birthday. (1995)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1995 (1995), S. 1229-1244 
    Details
    ISSN: 0947-3440
    Keywords: Fluorescent dyes ; Pigments ; Perylenes ; Carboximides ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Perylene-3,4-dicarboximides 2 are obtained by a decarboxylizing condensation of moderately sterically hindered primary amines with perylene-3,4,9,10-tetracarboxylic 3,4:9,10-bisanhydride (3) in the presence of water. Perylene-3,4-dicarboxylic anhydride (4) is prepared by hydrolysis of the imides with KOH in tert-butyl alcohol. The anhydride may be condensed with any primary amine to the corresponding imide. The imides are highly fluorescent and very photostable dyes.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1995199507164
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  • 10
    Electronic Resource
    Electronic Resource
    Chiral Bifluorophoric Perylene Dyes with Unusually High CD Effects - a Simple Model for the Photosynthesis Reaction Center (1997)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1997 (1997), S. 1151-1153 
    Details
    ISSN: 0947-3440
    Keywords: Fluorescent dyes ; Perylenes ; Heterocycles ; Photosynthesis reaction center ; CD effects ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of a bifluorophoric perylene dye (4a) is described, in which the two chromophores are linked by a chiral binaphthyl unit. A strong exciton coupling of the two chromophores, a bathochromically shifted fluorescence and strong CD effects are observed. The structure of 4 is compared to the photosynthesis reaction center.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199719970615
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