Journal
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
Volume 55, Issue 2, Pages 176-182Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10601325.2017.1403857
Keywords
2,7-carbazole; adamantane; photoluminescence; thermal stability
Categories
Funding
- National Natural Science Foundation of China [21476051, 21706039]
- Science and Technology Program of Guangdong Province [2016A050502057]
- Natural Science Foundation of Guangdong Province [2016A030310349, 2017A030310300]
- China Postdoctoral Science Foundation [2016M602441]
Ask authors/readers for more resources
A facile route to improve photoluminescent performance and service lifetime of a promising blue light emitting material is reported and demonstrated here using a copolymer system of N-(2-ethylhexyl)-2,7-carbazole (Cz) and 1,3,5,7-tetrakis-(4-bromophenyl) adamantane (TBA). The copolymers were successfully synthesized by palladium-catalyzed Suzuki coupling reactions. Structure and molecular weight of the materials were characterized by FT-IR and H-1-NMR spectroscopies, elemental analysis and gel permeation chromatography. The influence of adamantane content on the thermal stability and photoluminescent performance of the synthesized copolymers was investigated in detail. DSC results showed that glass transition temperature increased dramatically, from 68 degrees C for neat carbazole, to 88 degrees C, 120 degrees C and 152 degrees C, after the addition of 10%, 20%, and 30% TBA, respectively. The same trend was found when thermal decomposition temperature at 5% weight loss was evaluated from TGA data. Importantly, this increased stability can be extended to thermo-optical performance, with the Cz-TBA system showing higher color purity and stronger emission intensity within blue light wavelength than carbazole alone. Nevertheless, measurements of emitting spectral stability at a broader temperature range (100-200 degrees C) and photoluminescence quantum yield suggested that there is a delicate trade-off between the performance and adamantane content.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available