Concept

Synthetic colorant

Related publications (12)

“Inventions Represented by Models”: How Switzerland’s First Patent System Excluded Chemical Inventions (1888-1907)

In matters of patents of invention, Switzerland was a unique case in the nineteenth century. After a brief experiment between 1801 and 1803, the country remained without a patent system until 1888. Not only was this situation exceptional in Europe and especially among industrializing countries, but the first patent statute, enacted in 1888, also contained some unique provisions. It excluded all inventions in the chemical field, to accommodate the opposition of the Swiss chemical industry, which pursued a st

2019

Lateral Intermolecular Electronic Interactions of Diketopyrrolopyrrole D−π–A Solar Dye Sensitizers Adsorbed on Mesoporous Alumina

Jacques-Edouard Moser, Ulf Anders Hagfeldt, Heewon Bahng

The development of push−pull organic dyes utilizing the donor−(π-conjugated bridge)−acceptor (D−π−A) motif has induced a paradigm shift in the design of efficient nanocrystalline dye-sensitized solar cells (DSSCs), offering control over the aesthetic prope ...

2018

Light Scattering Enhancement at the Absorption Edge in Dewetting Droplets of Cyanine Dyes

Frank Nüesch, Jakob Heier, Florent Alexandre Boudoire

Diffraction properties of thin films of dewetted cyanine dye droplets are investigated and related to the complex refractive index. Strong changes in the index of refraction are often found near the absorption edge of organic dyes. Within a small window of ...

Wiley-V C H Verlag Gmbh2017

Ligand Engineering for the Efficient Dye-Sensitized Solar Cells with Ruthenium Sensitizers and Cobalt Electrolytes

Mohammad Khaja Nazeeruddin, Jacques-Edouard Moser

Over the past 20 years, ruthenium(II)-based dyes have played a pivotal role in turning dye-sensitized solar cells (DSCs) into a mature technology for the third generation of photovoltaics. However, the classic I3−/I− redox couple limits the performance and application of this technique. Simply replacing the iodine-based redox couple by new types like cobalt(3+/2+) complexes was not successful because of the poor compatibility between the ruthenium(II) sensitizer and the cobalt redox species. To address this

American Chemical Society2016

Effect of pi-spacers on the photovoltaic properties of D-pi-A based organic dyes

Mohammad Khaja Nazeeruddin

Three new triphenylamine based D-pi-pi-A (TPC, TSC and TOC) dyes with different pi-spacers have been synthesized and analysed their significance on the photophysical properties and photovoltaic applications. The synthesized dyes were characterized by NMR, ...

Elsevier Science Sa2015

Synthesis of poly(ethylene-co-butylene)-block-poly(ethylene oxide) surfactant and its use in the synthesis of polyhydroxyethyl methacrylate nanoparticles containing azo-dye

Thomas Geiger, Yee Song Ko

A synthetic path to poly(ethylene-co-butylene)-block-poly(ethylene oxide), a substitute for the "KLE" surfactant was developed. For this purpose, mono hydroxyl end-functionalized poly(ethylene-co-butylene) (similar to 3800 g mol(-1)) was modified with a tr ...

Royal Soc Chemistry2014

A new strategy for improving fluorescent immunoassays using photonic crystals

The most widely used substrates for fluorescent immunoassay are based on transparent materials such as glass or plastic with almost no optical functionality. Very recently, optical nanostructures made of metal on dielectrics have been proposed to perform photon management features mediated by surface or localized plasmons. In particular, resonant ring-shaped antennas have been demonstrated to enhance the amount of overall fluorescence radiated from few emitters and provide some control on the emission direc

2014

Reducing auto moiré in discrete line juxtaposed halftoning

Roger Hersch

Discrete line juxtaposed halftoning creates color halftones with discrete colorant lines of freely selectable rational thicknesses laid-out side by side. Screen elements are made of parallelogram screen tiles incorporating the discrete colorant lines. The repetition of discrete colorant lines from one screen element to the next may create auto moiré artifacts. By decomposing each supertile into screen element tiles having slightly different rational thicknesses, we ensure that successive discrete colorant l

Spie-Int Soc Optical Engineering2013

Photocatalytic degradation of Remazol Brilliant Blue (R) by sol-gel derived carbon-doped TiO2

Ravindranathan Thampi, Michael Jon Mattle

A simple, cheap and reproducible method to produce a C-doped TiO2 photocatalyst is presented, which can harvest visible light. This doped catalyst is able to degrade a stable organic dye molecule, Remazol Brilliant Blue (R) (RBB), under sunlight and visibl ...

Elsevier Science Bv2013

Accumulation and detoxification of sulfonated aromatic compounds from dye and textile industries by different plant species

Jean-Paul Schwitzguebel

Sulfonated anthraquinones are precursors of a large family of synthetic dyes and pigments, recalcitrant to biodegradation and thus not eliminated by classical wastewater treatments. In the development of a phytotreatment to remove sulfonated aromatic compounds from dye and textile industrial effluents, it has been shown that rhubarb (Rheum rabarbarum) and common sorrel (Rumex acetosa) are the most efficient plants. Both species, producing natural anthraquinones, not only accumulate, but also transform these

2010

Accumulation and transoformation of sulfonated aromatic compounds by higher plants - toward the phytotreatment of wastewater from dye and textile industries

Jean-Paul Schwitzguebel, Sylvie Aubert

Sulfonated anthraquinones are precursors of many synthetic dyes and pigments, recalcitrant to biodegradation and thus not eliminated by classical wastewater treatments. In the development of a phytoremediation process to remove sulfonated aromatic compounds from industrial effluents, the most promising results have been obtained with Rheum rabarbarum (rhubarb), a plant species producing natural anthraquinones. Rhubarb is not only able to accumulate, but also to transform, these xenobiotic chemicals. Even if

Springer-Verlag2008

Highly Efficient Solar Cells Using Organic Dyes with Amorphous Moiety

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Il Jung

Novel organic sensitizers comprising donor; electron-conducting, and anchoring groups were engineered at molecular level and synthesized. The functionalized unsymmetrical organic sensitizers 3-{5-[N,N-Bis(9,9-dimethylfluorene-2-yl)phenyl]-thiophene-2-yl}-2 ...

MRS2007

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