Syntheses of some novel optical brightener kernels via 1,3-dipolar cycloaddition reactions

Türker, L
Güleç, A
1,3-Dipolar cycloaddition reactions of 3-phenylphthalazinium-1-olate with various dipolarophiles which lead to some potential optical brightener structures are described. The cycloadducts obtained from vinyl ethers exhibited the Price effect, whereas N-vinyl carbazole adduct displayed atropisomerism.
Dyes and Pigments


The syntheses of some novel 2-substituted phenylazo-1,3-indandiones
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The synthesis of various novel 2-substituted phenylazo-1,3-indandiones (which are potential dyestuffs) by the Japp-Kligemann coupling reaction is reported. Ultraviolet-visible absorption spectra of the compounds were examined in various solvents and the compounds in solution exhibited azo-hydrazone tautomerism. The effects of various substituents on these equilibria are discussed.
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We provide a practical guide to methods and protocols that use polymer networks templated from droplets of liquid crystal (LC) to synthesize micrometer-sized polymeric particles that are chemically patchy, are anisometric in shape, possess anisotropic optical properties, and/or are mesoporous. We describe a range of methods that permit the preparation of LC droplets (containing reactive monomers) as templates for polymerization, including formation of LC-in-water emulsions by mechanical methods (e.g., vorte...
Proquinoidal-Conjugated Polymer as an Effective Strategy for the Enhancement of Electrical Conductivity and Thermoelectric Properties
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Kinetic studies for the production of tertiary ethers used as gasoline additives
Boz, Nezahat; Doğu, Timur; Department of Chemical Engineering (2004)
In the present study, the kinetics studies for etherification reactions were investigated in detail. In the first phase of present study, different acidic resin catalysts were prepared by the heat treatment of Amberlyst-15 catalysts at 220°C at different durations of time and also by the synthesis of sulfonated styrene divinylbenzene cross-linked resins at different conditions. A linear dependence of reaction rate on hydrogen ion-exchange capacity was in 2M2B+ethanol reaction. However, in the case of 2M1B+e...
Acidity characterization and adsorption characteristics of cobalt and lead doped SBA15 mesoporous materials
Güner, Özge; Üner, Deniz; Department of Chemical Engineering (2007)
In this study, the surface acidity of Co and/or Pb doped SBA15 mesoporous catalysts were investigated by both diffuse reflectance fourier transform (DRIFT) infrared spectroscopy and transmission mode fourier transform infrared spectroscopy. Pyridine was used to identify the Brønsted and Lewis acid sites of the surface, at room temperature. From the DRIFT spectrum typical stretching vibrations of isolated terminal silanol (Si-OH) groups were observed for all the catalysts. These silanol group bands dissappea...
Citation Formats
L. Türker and A. Güleç, “Syntheses of some novel optical brightener kernels via 1,3-dipolar cycloaddition reactions,” Dyes and Pigments, pp. 307–322, 1990, Accessed: 00, 2020. [Online]. Available: