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2,260 Newest Publications about the topic dyes


Theoretical Procedure for Optimizing Dye-Sensitized Solar Cells: From Electronic Structure to Photovoltaic Efficiency

04-05-2011 | Tangui Le Bahers; Frédéric Labat; Thierry Pauporté; Philippe P. Lainé; Ilaria Ciofini, Journal of the American Chemical Society, 2011

A step-by-step theoretical protocol based on density functional theory (DFT) and time-dependent DFT at both the molecular and periodic levels is proposed for the design of dye-sensitized solar cell (DSSC) devices including dyes and electrolyte additives. This computational tool is tested with a ...


Ultrafiltration Membranes Composed of Highly Cross‐Linked Cationic Polymer Gel: the Network Structure and Superior Separation Performance

03-05-2011 | Wang, Qifeng; Samitsu, Sadaki; Ichinose, Izumi, Advanced Materials, 2011

Ultrafiltration membranes with a thickness of several tens of nanometers are prepared from cross‐linked poly(4‐vinylpyridine) gel using a flat and smooth sacrificial layer of metal hydroxide nanostrands. The membranes have a network structure with pores sizes of approximately 2.0 ± 1.0 nm and ...


Facile Synthesis of Symmetric, Monofunctional Cyanine Dyes for Imaging Applications

02-05-2011 | Lai-Qiang Ying; Bruce P. Branchaud, Bioconjugate Chemistry, 2011

Efficient syntheses of several members of a new class of symmetric, monocarboxylate-functionalized cyanine dyes have been developed. The synthesis is a simple two-step method, typically with greater than 60% yield and easy final product purification. The new monocarboxylate-functionalized cyanine ...


Hydrogen-Bond-Directed Formation of Supramolecular Polymers Incorporating Head-to-Tail Oriented Dipolar Merocyanine Dyes

02-05-2011 | Ralf Schmidt; Matthias Stolte; Matthias Grüne; Frank Würthner, Macromolecules, 2011

A self-complementary Hamilton-receptor-functionalized merocyanine dye has been synthesized by incorporating a hydrogen bonding receptor site to the donor moiety of a merocyanine chromophore that bears a barbituric acid acceptor unit. The optical and electro-optical properties of monomeric dyes ...


Columnar Mesophases Based on Zinc Chlorophyll Derivatives Functionalized with Peripheral Dendron Wedges

02-05-2011 | Sengupta, Sanchita; Uemura, Shinobu; Patwardhan, Sameer; Huber, Valerie; Grozema, Ferdinand C.; Siebbeles, Laurens D ..., Chemistry - A European Journal, 2011

Abstract A chlorophyll derivative with a central zinc ion, a methoxy functionality at its 31‐position, and functionalized with a second‐generation dendron (3,4‐3,4,5)12G2‐CH2OH at its 172‐position was synthesized starting from natural chlorophyll a (Chl a). This compound exhibits liquid ...


Expanded Porphyrins: Intriguing Structures, Electronic Properties, and Reactivities

02-05-2011 | Saito, Shohei; Osuka, Atsuhiro, Angewandte Chemie International Edition, 2011

Abstract The chemistry of expanded porphyrins, which are higher homologues of porphyrins, has been intensively explored for the last three decades. Expanded porphyrins exhibit structures, electronic properties, coordination chemistry, and reactivities that are entirely different from those of ...


On the Reactions of Furan‐2,3‐diones with Oxindole (=1,3‐Dihydro‐2H‐indol‐2‐one) and Lawesson Reagent. Synthesis of New 1,3‐Dihydro‐2H‐indol‐2‐ones, Bis‐furanones, and Bis‐pyrrolones

01-05-2011 | Elif Korkusuz; İsmail Yıldırım, Helvetica Chimica Acta, 2011

Abstract Lactone analogues of 3‐substituted oxindoles (=1,3‐dihydro‐2H‐indol‐2‐ones) and nonbenzoid oxa‐analogous isoindigoid or nonbenzoid isoindigoid dyes were prepared by the reactions of furan‐2,3‐diones with oxindole and Lawesson reagent (Schemes 1 and 3), respectively. So, new derivatives ...


Preparation of poly (acrylic acid) containing core‐shell type resin for removal of basic dyes

01-05-2011 | Yavuz, Erdem; Bayramoğlu, Gülay; Arica, Mehmet Yakup; Senkal, Bahire Filiz, Journal of Chemical Technology & Biotechnology, 2011

Abstract BACKGROUND: A core‐shell type carboxylic acid modified resin was prepared and dye sorption characteristics of the resin were investigated. The resulting grafted resin material has been shown to be an efficient sorbent for removal of basic dyes from water as a result of the carboxylic ...


A soft‐cache strategy for pathologist's navigation in virtual microscopy

01-05-2011 | Gómez, Francisco; Marín, Diana; Romero, Eduardo, Microscopy Research and Technique, 2011

Abstract Navigation through large microscopical images demands special characteristics like flexibility to access image data and progressive recovery or relevant information, i.e., several qualities, magnifications, and random accesses to any desired Window of Interest in the Virtual Slide ...


Effect of organic solvents on kinetics of J-aggregation and deaggregation of polymethine dyes in aqueous solution

30-04-2011 | A. K. Chibisov, G. V. Zakharova, Nanotechnologies in Russia, 2011

The presence of organic solvents (acetonitrile, acetone, and dioxan) as additives (up to 5 vol %) in an aqueous solution of alkylmesothia- and oxacarbocyanine dyes containing KCl and/or Mg(NO3)2 results in a variation of the rate of both J-aggregation and deaggregation. The rate of J-aggregation ...


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