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2,437 Newest Publications about the topic dyes


Photophysical and quantum chemical study on a J-aggregate forming perylene bisimide monomer

07-Sep-2011 | David Ambrosek; Henning Marciniak; Stefan Lochbrunner; Jörg Tatchen; Xue-Qing Li; Frank Würthner; Oliver Kühn, Physical Chemistry Chemical Physics, 2011

Perylene bisimides (PBIs) are excellent dyes and versatile building blocks for supramolecular structures. Only recently have PBIs been shown to depict absorption characteristics of J-aggregates. We apply electronic structure calculations and femtosecond pump–probe spectroscopy to the monomeric, ...


Near‐Infrared Fluorescent Nanoparticles Formed by Self‐Assembly of Lipidic (Bodipy) Dyes

06-Sep-2011 | Olivier, Jean‐Hubert; Widmaier, Josiane; Ziessel, Raymond, Chemistry - A European Journal, 2011

Bodipy‐iercing: A Bodipy dye decorated with an ammonium at the tip and gallate‐shaped flexible chains at the periphery was found to self‐assemble into fluorescent nanoparticles in the presence of water (see figure). These nanoparticles act as host for outside dyes equipped with paraffin chains, ...


Alternating flow of immiscible liquids in microchannel

06-Sep-2011 | Matsuno, Hiroki; Hirano, Hiroyuki; Nakagawa, Tomohiro; Wang, Xian; Okamoto, Naotaka, Asia-Pacific Journal of Chemical Engineering, 2011

ABSTRACT This article is an experimental study of the alternating flow of immiscible liquids in a microchannel. The two-phase flow system of water and cyclohexane was adopted. The flow was visualized by the use of the color dyes, and the segment length was measured to investigate the aspect of ...


ChemInform Abstract: General Route to Symmetric and Asymmetric meso‐CF3‐3(5)‐Aryl(hetaryl)‐ and 3,5‐Diaryl(dihetaryl)‐BODIPY Dyes.

06-Sep-2011 | Lubov N. Sobenina; Alexander M. Vasil'tsov; Olga V. Petrova; Konstantin B. Petrushenko; Igor A. Ushakov; Gilles Clav ..., ChemInform, 2011

Abstract The new dyes (V) and (VIII) are highly fluorescent.


Bis‐Donor–Bis‐Acceptor Tribranched Organic Sensitizers for Dye‐Sensitized Solar Cells

05-Sep-2011 | Abbotto, Alessandro; Leandri, Valentina; Manfredi, Norberto; De Angelis, Filippo; Pastore, Mariachiara; Yum, Jun ..., European Journal of Organic Chemistry, 2011

Abstract A new class of tribranched dye‐sensitized solar cell (DSC) sensitizers carrying two conjugated donors and two acceptor/anchoring groups is introduced. The approach leads to significantly different optical properties and enhanced stability with respect to related di‐ and monobranched ...


Multistep liquid-phase lithography for fast prototyping of microfluidic free-flow-electrophoresis chips

03-Sep-2011 | Stefan Jezierski, Leonid Gitlin, Stefan Nagl, Detlev Belder, Analytical and Bioanalytical Chemistry, 2011

We present a fast and versatile method to produce functional micro free-flow electrophoresis chips. Microfluidic structures were generated between two glass slides applying multistep liquid-phase lithography, omitting troublesome bonding steps or cost-intensive master structures. Utilizing a ...


Near-Infrared Photopolymerization: Initiation Process Assisted by Self-Quenching and Triplet-Triplet Annihilation of Excited Cyanine Dyes

01-Sep-2011 | Chemical Physics Letters, 2011

The mechanism of radical polymerization photoinitiated by a near-infrared absorbing indotricarbocyanine (HITC) was investigated using an indirect kinetics method based on the photobleaching dynamics of the dye. Despite similar photophysical features in glycerol and in pentaerythritol triacrylate ...


Ab initio study of the structure, spectral, ionochromic, and fluorochromic properties of benzoazacrown‐containing dyes as potential optical molecular sensors

01-Sep-2011 | Alexandra Y. Freidzon; Alexander A. Bagatur'yants; Evgeny N. Ushakov; Sergey P. Gromov; Michael V. Alfimov, International Journal of Quantum Chemistry, 2011

Abstract Experimental absorption and emission spectra of benzoaza‐18‐crown‐6‐containing styryl dye 2a and its complexes with Li+, Na+, and Ca2+ are recorded. It is found that complexation causes large hypsochromic shifts of the long‐wave absorption band of the dye. In addition, the spectra of ...


Selective Encapsulation of Ionic Dyes by Core/Shell Amphiphilic Macromolecules Derived from Hyperbranched Polyethylenimine: Properties through Structures

01-Sep-2011 | Decheng Wan; Yi Lai; Ming Jin; Hongting Pu, Macromolecular Chemistry and Physics, 2011

Abstract Reverse‐micelle‐like CAMs derived from HPEI, which exist as either aggregates or unimolecular micelles, show selectivity upon the encapsulation of water‐soluble and ionic dyes. For rigid dyes, the encapsulating ability is very weak, while for less rigid ones, the encapsulation is ...


Single-Cell Electroporation of Xenopus Tadpole Tectal Neurons

01-Sep-2011 | Liu, X. F., Haas, K., CSH Protocols, 2011

INTRODUCTION Single-cell electroporation (SCE) is a versatile technique for delivering electrically charged macromolecules, including DNA, RNA, synthetic oligonucleotides, peptides, dyes, and drugs, to individual cells within intact tissues. Here, we describe methods for SCE of single tectal ...


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