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Advances in Materials Science and Engineering
Volume 2014, Article ID 510960, 5 pages
Research Article

Isolation and Characterisation of 2-Tert-butyl-8-hydroxyquinoline as a Crystalline Solid and Its Blue Fluorescent Li Complex

1Organic Electronics, School of Engineering, Brunel University, Uxbridge UB8 3PH, UK
2School of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK

Received 12 June 2013; Revised 26 November 2013; Accepted 1 December 2013; Published 4 February 2014

Academic Editor: Steven Suib

Copyright © 2014 Poopathy Kathirgamanathan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


2-Tert-butyl-8-hydroxyquinoline (2-TB-8-hq) has been isolated as a crystalline solid and its X-ray structure elucidated, resolving three decades of controversy, since it was previously wrongly reported as yellow oil by some other workers. An improved synthetic method has been developed which increases the yield from 20% to 60%. The lithium complex of 2-TB-8-hq is blue emitting and the HOMO and LUMO levels are lowered by 0.86 eV and 0.74 eV, respectively, compared with the parent lithium 8-hydroxyquinolinolate (Li 8-hq).