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A Way to Improve Luminescent Efficiency of Bis-Chalcone Derivatives
Joint Authors
Tay, Meng Guan
Tiong, Mee Hing
Chia, Ying Ying
Kuan, Suzie Hui Chin
Liu, Zhi-Qiang
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-07-20
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Chalcone related compounds have been reported as a poor luminescence molecule due to the quenching processes from the intramolecular torsional motions and cis-trans isomerization in the α,β-unsaturated ketone moiety.
Despite this limitation, we found a way to improve the luminescent efficiency of our bis-chalcone derivative.
In this project, two series of bis-chalcone compounds have been synthesized through Claisen-Schmidt condensation by reacting terephthaldehyde or 2,5-dimethoxyterephthaldehyde with the respective R-acetophenone [where R = H (1a and 2a) and ortho-hydroxy (1b and 2b)] in 1 : 2 mole ratio.
The presence of a methoxy (OMe) substituent on the central phenyl ring of bis-chalcone has weakened the C=C bond at the α,β-unsaturated ketone moiety of 2a and 2b.
Interestingly, the OMe group has improved the emission efficiency of the bis-chalcone; that is, the quantum yield of 1a in DCM solution was not able to be determined due to poor luminescence, but the quantum yield of 2a in DCM solution was improved to 0.57.
In addition, compound 2a also shows solvatochromism effect where the λmax emission shifted from 499 nm in nonpolar solvents (benzene) to 523 nm in polar solvents (acetonitrile).
This work provides another way to improve the emission efficiency of chalcone related compounds apart from using the complexation method which has been reported before.
American Psychological Association (APA)
Tay, Meng Guan& Tiong, Mee Hing& Chia, Ying Ying& Kuan, Suzie Hui Chin& Liu, Zhi-Qiang. 2016. A Way to Improve Luminescent Efficiency of Bis-Chalcone Derivatives. Journal of Chemistry،Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1107635
Modern Language Association (MLA)
Tay, Meng Guan…[et al.]. A Way to Improve Luminescent Efficiency of Bis-Chalcone Derivatives. Journal of Chemistry No. 2016 (2016), pp.1-8.
https://search.emarefa.net/detail/BIM-1107635
American Medical Association (AMA)
Tay, Meng Guan& Tiong, Mee Hing& Chia, Ying Ying& Kuan, Suzie Hui Chin& Liu, Zhi-Qiang. A Way to Improve Luminescent Efficiency of Bis-Chalcone Derivatives. Journal of Chemistry. 2016. Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1107635
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1107635