Mechanochromism and electroluminescence in positional isomers of tetraphenylethylene substituted phenanthroimidazoles
- Authors
- Jadhav, T[Jadhav, Thaksen]; Choi, JM[Choi, Jeong Min]; Shinde, J[Shinde, Jivan]; Lee, JY[Lee, Jun Yeob]; Misra, R[Misra, Rajneesh]
- Issue Date
- 28-Jun-2017
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY C, v.5, no.24, pp.6014 - 6020
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY C
- Volume
- 5
- Number
- 24
- Start Page
- 6014
- End Page
- 6020
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/28501
- DOI
- 10.1039/c7tc00950j
- ISSN
- 2050-7526
- Abstract
- The study of aggregation-induced emission (AIE) luminogens has gained momentum due to their remarkable luminogenic properties and applications in mechano-sensors and organic light-emitting diodes (OLEDs). In this article we have studied three positional isomers (ortho, meta, and para) of phenanthroimidazoles 3a-3c and explored their AIE, mechanochromic and electroluminescence behavior. The phenanthroimidazoles 3a-3c were synthesized by the Suzuki cross-coupling reaction of (2-bromo/3-bromo/4-bromo) phenathroimidazoles 2a-2c with 4-(1,2,2-triphenylvinyl) phenylboronic acid pinacol ester in good yields. The phenanthroimidazoles 3a-3c exhibit strong AIE. The mechanochromic study reveals reversible mechanochromism with good color contrast between blue and green colors. The ortho (3a) and meta (3b) isomers exhibit a grinding induced spectral shift of 98 nm while the para-isomer (3c) exhibits a spectral shift of 43 nm. Moreover, 3a-3c were explored as non-doped blue emitters in efficient organic light-emitting diodes. Among the three emitters, 3c provided a high quantum efficiency of 4.0% in a non-doped blue device.
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Collections - Engineering > School of Chemical Engineering > 1. Journal Articles
- Engineering > Chemical Engineering > 1. Journal Articles
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