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3,278 Newest Publications about the topic dyes

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Size-Matching Effect on Inorganic Nanosheets: Control of Distance, Alignment, and Orientation of Molecular Adsorption as a Bottom-Up Methodology for Nanomaterials

23-Jan-2013 | Shinsuke Takagi; Tetsuya Shimada; Yohei Ishida; Takuya Fujimura; Dai Masui; Hiroshi Tachibana; Miharu Eguchi; Haruo ..., Langmuir, 2013

We have been investigating complexes composed of nanolayered materials with anionic charges such as clay nanosheets and dye molecules such as cationic porphyrins. It was found that the structure of dye assembly on the layered materials can be effectively controlled by the use of electrostatic ...

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Columnar Mesomorphism of Fluorescent Board-Shaped Quinoxalinophenanthrophenazine Derivatives with Donor–Acceptor Structure

23-Jan-2013 | Shuai Chen; Farah S. Raad; Mohamed Ahmida; Bilal R. Kaafarani; S. Holger Eichhorn, Organic Letters, 2013

Quinoxalino[2′,3′:9,10]phenanthro[4,5-abc]phenazine (QPP) dyes have been studied as electron acceptor materials, fluorophores, and building blocks for self-organizing organic semiconductors. Condensation of tetraketopyrene with electron-rich diamino-terphenylene and -triphenylene derivatives ...

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Metal coordination in photoluminescent sensing

22-Jan-2013 | Zhipeng Liu; Weijiang He; Zijian Guo, Chemical Society Reviews, 2013

Coordination chemistry plays an essential role in the design of photoluminescent probes for metal ions. Metal coordination to organic dyes induces distinct optical responses which signal the presence of metal species of interest. Luminescent lanthanide (Ln3+) and transition metal complexes of d6, ...

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The Power of Fluorogenic Probes

21-Jan-2013 | André Nadler, Carsten Schultz, Angewandte Chemie International Edition, 2013

A definite turn‐on: Turning on fluorescence only where successful labeling is happening sounds as desirable as delivering a drug only where the drug target resides. New fluorogenic xanthene derivatives from the Bertozzi research group are getting us closer to “magic bullet” dyes (see ...

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Nanocavity‐Based Determination of Absolute Values of Photoluminescence Quantum Yields

18-Jan-2013 | Alexey I. Chizhik, Ingo Gregor, Benedikt Ernst, Jörg Enderlein, ChemPhysChem, 2013

Abstract We present a new method for determining absolute values of quantum yield of luminescent emitters, which is based on the modification of the radiative transition of emitters within a tunable metallic nanocavity. The method presented is easy to set up and works without any calibration. ...

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Phosphine Quenching of Cyanine Dyes as a Versatile Tool for Fluorescence Microscopy

17-Jan-2013 | Joshua C. Vaughan; Graham T. Dempsey; Eileen Sun; Xiaowei Zhuang, Journal of the American Chemical Society, 2013

We report that the cyanine dye Cy5 and several of its structural relatives are reversibly quenched by the phosphine tris(2-carboxyethyl)phosphine (TCEP). Using Cy5 as a model, we show that the quenching reaction occurs by 1,4-addition of the phosphine to the polymethine bridge of Cy5 to form a ...

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Surface quaternized cellulose nanofibrils with high water absorbency and adsorption capacity for anionic dyes

16-Jan-2013 | Aihua Pei; Nuria Butchosa; Lars A. Berglund; Qi Zhou, Soft Matter, 2013

Surface quaternized cellulose nanofibrils were mechanically disintegrated from wood pulp that was pretreated through a reaction with glycidyltrimethylammonium chloride. The resulting quaternized cellulose nanofibrils (Q-NFC) with trimethylammonium chloride contents of 0.59–2.31 mmol g−1 were ...

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Hierarchical CeO2 nanospheres as a high-efficient adsorbent for dyes removal

16-Jan-2013 | Xi Hong Lu, New Journal of Chemistry, 2013

Herein, we reported a facile electrochemical method to prepare hierarchical porous CeO2 nanospheres and their implementation as a high-efficent absorbent in removing organic dyes. These hierarchical CeO2 nanospheres constructed by many nanocrystallites exhibit an excellent performance in removing ...

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Energy-transfer-based wavelength-shifting DNA probes with “clickable” cyanine dyes

16-Jan-2013 | Carolin Holzhauser; Moritz M. Rubner; Hans-Achim Wagenknecht, Photochemical & Photobiological Sciences, 2013

The insertion of cyanine dye azides as energy donor dyes via postsynthetic “click”-type cycloaddition chemistry with e.g. a new thiazole orange azide combined with thiazole red yields dual emitting DNA probes with good fluorescence readout properties.

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Thermally stable azobenzene dyes through hybridization with POSS

16-Jan-2013 | Hong Chi; Khine Yi Mya; Tingting Lin; Chaobin He; FuKe Wang; Wee Shong Chin, New Journal of Chemistry, 2013

Azobenzene (AB) dyes have been widely applied in organic devices owing to their interesting photo-isomerization properties. Their application for higher temperature usage is limited, however, due to their intrinsically poor thermal stability. Here we show a facile way to significantly enhance the ...

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