52431-30-8Relevant articles and documents
Small band gap oligothieno[3,4-b]pyrazines
Karsten, Bram P.,Janssen, Rene A. J.
, p. 3513 - 3516 (2008)
(Chemical Equation Presented) (Graph Presented) The synthesis and the optical and electrochemical properties of thiophene end capped oligo(2,3-alkylthieno[3,4-b]pyrazine)s are presented. The optical absorption rapidly shifts to lower energies with increasing chain length, caused in almost equal amounts by a rise of the HOMO and a lowering of the LUMO levels. The optical band gap of the polymer is estimated to be 1.13 ± 0.07 eV. Extrapolated redox potentials indicate that the polymer is a small band gap p-type material.
Donor-Acceptor-Donor Thienopyrazines via Pd-Catalyzed C-H Activation as NIR Fluorescent Materials
McNamara, Louis E.,Liyanage, Nalaka,Peddapuram, Adithya,Murphy, J. Scott,Delcamp, Jared H.,Hammer, Nathan I.
, p. 32 - 42 (2016)
A series of thienopyrazine-based donor-acceptor-donor (D-A-D) near-infrared (NIR) fluorescent compounds were synthesized through a rapid, palladium-catalyzed C-H activation route. The dyes were studied through computational analysis, electrochemical prope
Donor-Acceptor-Donor Thienopyrazine-Based Dyes as NIR-Emitting AIEgens
Calamante, Massimo,Coppola, Carmen,Dessì, Alessio,Franchi, Daniele,Goti, Giulio,Mordini, Alessandro,Reginato, Gianna,Sinicropi, Adalgisa,Zani, Lorenzo
, p. 2655 - 2664 (2021/06/26)
Organic Near-Infrared luminophores have found broad application as functional materials, but the development of efficient NIR emitters is still a challenging goal. Here we report on a new class of thieno[3,4-b]pyrazine-based NIR emitting materials with Aggregation Induced Emission (AIE) properties. The dyes feature a donor–acceptor–donor (D?A?D) structure, with a thienopyrazine acceptor core connected to two triarylamine donor groups bearing a tetraphenylethylene (TPE) moiety. Fast and efficient synthesis allowed the modular preparation of three dyes of tunable absorption and emission profiles. These constructs were extensively characterized by spectroscopic studies in different solvents, which revealed intense light-harvesting ability and emissions in the deep-red and NIR region with large Stokes shift values. Remarkably, the dyes exhibited AIE properties, retaining emissive ability in the aggregate state, thus emerging as attractive materials for their potential application in the development of luminescent devices.
TRIPHENYLAMINE COMPOUNDS, POLYMERS MADE THEREFROM AND ELECTROCHROMIC DEVICE COMPRISING THE SAME
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Paragraph 0173; 0176; 0180-0182, (2018/05/03)
The present invention relates to a triphenylamine compound, to a polymer thereof and to an electrochromic device comprising the same, and specifically, to a triphenylamine compound represented by the chemical formula (1), to a polymer thereof and to an electrochromic device comprising the same. In the chemical formula (1), R, R1, R2, R3, R4, and R5 are as defined in claim 1. The present invention also provides a triphenylamine-based polymer capable of forming a thin film having uniform surface and exhibiting excellent reversibility in the electrochromic characteristics.COPYRIGHT KIPO 2018