Zobrazeno 1 - 10
of 262
pro vyhledávání: '"Hans Junek"'
Publikováno v:
Liebigs Annalen. 1996:397-402
A new approach to dissociable chromoionophores 5, 6a–e, 7 and 8 by reaction of (dicyanomethylene)indandione 1 and (dicyanomethylene)pyrazolones 2a–e, respectively, with aminophenyl crowns 3 and 4 is described. The complexation constants were dete
Publikováno v:
Journal of Molecular Structure: THEOCHEM. 543:129-146
The effect of structural variations of either the donor (number and position of methoxy groups, replacement of the aryl by Fischer's base) or the acceptor moiety (bisacylation of the amino group, extension of the conjugated system by condensation wit
Publikováno v:
Dyes and Pigments. 44:219-226
Asymmetric cyanine dyes (penta- and heptamethines) prepared by coupling Fischer's base or Fischer's aldehyde with malononitrile dimer or analogous compounds are described. Dye characteristics are given and structure-color correlations are discussed.
Autor:
Michael C. Zerner, Max E. Lippitsch, Gert Kroner, Renate Dworczak, Walter M. F. Fabian, Dietmar Kieslinger, Hans Junek
Publikováno v:
International Journal of Quantum Chemistry. 79:253-266
The effect of conformation (E/Z isomerism), nature (donor/acceptor) of substituents, and endgroups (indandione, pyrazolone, pyrazoledione) on the molecular hyperpolarizabilityvec of dicyanomethylene (hetero)aromatic dyes is investigated by means of s
Autor:
Hans Junek, Andrei Boila‐Göckel
Publikováno v:
Journal für praktische Chemie. 341:20-28
Publikováno v:
Monatshefte für Chemie / Chemical Monthly. 129:1313-1318
The reaction of ethoxymethylene malononitrile and ethoxymethylene cyanoacetic acid ethylester with substituted hydrazines to substituted 5-aminopyrazoles is described. The influence of different substituents on possible migrations during the ring clo
Publikováno v:
Monatshefte für Chemie / Chemical Monthly. 129:1207-1211
An improved synthesis of cyanoacetophenone is described. Cyanoacetophenone was reacted with dimethylformamide-dimethylacetal and diphenylformamidine to give 1-dimethylamino-3-oxo-3-phenyl-1-propene-2-carbonitrile and 1-anilinomethylene-3-oxo-3-phenyl
Publikováno v:
Organic Preparations and Procedures International. 30:367-372
(1998). A FACILE SYNTHESIS OF 5-BENZOYLCYTOSINE DERIVATIVES. Organic Preparations and Procedures International: Vol. 30, No. 3, pp. 367-372.
Publikováno v:
Dyes and Pigments. 36:45-59
Copolymers of methyl methacrylate and chromophores with methacrylate end groups were obtained by radical polymerization. Their nonlinear optical properties ware examined by electric field induced second-harmonic generation (EFISH) measurements and co
Publikováno v:
Dyes and Pigments. 34:13-23
Polyesters with covalently bound azomethine and carbonanalogous dye moieties were obtained by polymer analogous reactions. Their nonlinear optical properties were examined by electric field induced second harmonic generation measurements and compared