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3,191 Newest Publications about the topic dyes

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Interfacing Click Chemistry with Automated Oligonucleotide Synthesis for the Preparation of Fluorescent DNA Probes Containing Internal Xanthene and Cyanine Dyes

23-Nov-2012 | I. Kira Astakhova, Jesper Wengel, Chemistry - A European Journal, 2012

Abstract Double‐labeled oligonucleotide probes containing fluorophores interacting by energy‐transfer mechanisms are essential for modern bioanalysis, molecular diagnostics, and in vivo imaging techniques. Although bright xanthene and cyanine dyes are gaining increased prominence within these ...

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Synthesis and Molecular Properties of Acceptor‐Substituted Squaraine Dyes

23-Nov-2012 | Ulrich Mayerhöffer, Marcel Gsänger, Matthias Stolte, Benjamin Fimmel, Frank Würthner, Chemistry - A European Journal, 2012

Abstract A broad series of more than 20 acceptor‐substituted squaraines was synthesized that feature different acceptor functionalities at the central squaraine four‐membered ring. The influence of these acceptor units on the reactivity of semisquaraine precursors and stability of the ...

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Molecules, Vol. 17, Pages 13891-13909: A Facile Synthesis of New Monoazo Disperse Dyes Derived from 4-Hydroxyphenylazopyrazole-5-amines: Evaluation of Microwave Assisted Dyeing Behavior

23-Nov-2012 | Al-Etaibi, Alya M.; El-Apasery, Morsy A.; Ibrahim, Maher R.; Al-Awadi, Nouria A., Molecules, 2012

A series of new monoazo disperse dyes containing pyrazolopyrimidine moieties was synthesized by coupling malononitrile or 3-aminocrotononitrile with 4-hydroxy- benzenediazonium chloride. Treatment of the resulting products with hydrazine hydrate yields the corresponding 4-arylazoaminopyrazoles, ...

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Metal‐Free Benzodithiophene‐Containing Organic Dyes for Dye‐Sensitized Solar Cells

22-Nov-2012 | Elena Longhi, Alberto Bossi, Gabriele Di Carlo, Stefano Maiorana, Filippo De Angelis, Paolo Salvatori, Annamaria Pet ..., European Journal of Organic Chemistry, 2012

Abstract Two new metal‐free organic dyes, CR29 and CR52, with high extinction coefficients in the visible spectral region between 400–650 nm, have been synthesized. The donor–acceptor structure of the dyes feature benzodithiophene moieties BDT1 and BDT as rigid π‐conjugated spacers, which have ...

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Synthesis and Characterization of Squaraine‐Based Conjugated Polymers With Phenylene Linkers for Bulk Heterojunction Solar Cells

22-Nov-2012 | Takeshi Maeda, Tatsuya Tsukamoto, Ayaka Seto, Shigeyuki Yagi, Hiroyuki Nakazumi, Macromolecular Chemistry and Physics, 2012

Abstract π‐Conjugated copolymers consisting of squaraine dyes as light‐harvesting components and phenylene linkers (PSQ) are presented. They show intense absorption in visible (Vis) and near‐infrared (NIR) region, originating with the intramolecular charge transfer of the dye. Although their ...

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Effects of bis-carbazole based D-[small pi]-A sensitizers on solar energy capture in DSSCs

21-Nov-2012 | Bo Hyung Kim; Harold S. Freeman, Photochemical & Photobiological Sciences, 2012

A new series of molecular engineered dyes having a carbazole (CA) based bulky donor was synthesized and compared to a previously studied set of dyes having a diphenyl amine (DP) donor for their use in dye sensitized solar cells. In this work, their photophysical, electrochemical, and kinetic ...

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Cooperative Supramolecular Polymerization: Comparison of Different Models Applied on the Self‐Assembly of Bis(merocyanine) Dyes

21-Nov-2012 | Gustavo Fernández, Matthias Stolte, Vladimir Stepanenko, Frank Würthner, Chemistry - A European Journal, 2012

Abstract Three new molecular building blocks 1 a–c for supramolecular polymerization are described that feature two dipolar merocyanine dyes tethered by p‐xylylene spacers. Concentration‐ and temperature‐dependent UV/Vis spectroscopy in chloroform combined with dynamic light scattering, ...

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Supercritical fluid dyeing of synthetic and natural textiles – a review

21-Nov-2012 | Mauro Banchero, Coloration Technology, 2012

Supercritical fluid dyeing is an interesting alternative to the conventional aqueous process because of its environmental benefits. The aim of the paper is to provide the reader with an up‐to‐date overview of this subject, covering various aspects, such as the solubility and equilibrium ...

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A quantum-mechanical study of the adsorption of prototype dye molecules on rutile-TiO2(110): a comparison between catechol and isonicotinic acid

21-Nov-2012 | F. Risplendi; G. Cicero; G. Mallia; N. M. Harrison, Physical Chemistry Chemical Physics, 2012

In this work we present a theoretical investigation of the attachment of catechol and isonicotinic acid to the rutile-TiO2(110) surface. These molecules can be considered as prototypical dyes for use in Grätzel type dye sensitised solar cells (DSCs) and are often employed as anchoring groups in ...

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Photocatalytic degradation of organic dyes with hierarchical Bi2O2CO3 microstructures under visible-light

21-Nov-2012 | Puttaswamy Madhusudan; Jun Zhang; Bei Cheng; Gang Liu, CrystEngComm, 2012

A facile one-step hydrothermal method was developed to synthesize novel hierarchical rose-like Bi2O2CO3 microstructures. The physico-chemical properties of the as-synthesized catalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray ...

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