Add time:09/24/2019 Source:sciencedirect.com
Conjugated copolymers were prepared from 2,7-di(thiophen-2-yl)phenanthrene-9,10-dione units with various polycyclic aromatic hydrocarbon moieties, namely, fluorene (PQF1-2), carbazole (PQC), and silafluorene (PQS). Employing mild condensation reaction conditions, PQF1-2 copolymers underwent post-modification of their ortho-dicarbonyl groups into quinoxaline- (PQF3-4) and phenazine- (PQF5-6) derivatives. The copolymers PQF1-6, PQC, and PQS were characterized by different analytical techniques, such as, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), 1H- and 13C nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR), UV–vis absorption, and emission spectroscopy. Post-modification of copolymers PQF1-2 led to interesting changes in the emission properties where the quinoxaline-containing copolymers PQF3-4 portrayed a 20–40 nm hypsochromic shift with a blue emission (~470 nm) whereas copolymers PQF5-6 bearing the more aromatically extended phenazine-units revealed a ~55 nm bathochromic shift displaying a green emission (~560 nm).
We also recommend Trading Suppliers and Manufacturers of 9,10-DibromoPhenanthrene (cas 15810-15-8). Pls Click Website Link as below: cas 15810-15-8 suppliers
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View