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Strong luminescence behavior of mono- and dimeric imidazoquinazolines: Swift OLED degradation under electrical current
Dr Hari Singh Gour Vishwavidyalaya, India.
Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering. Kyushu University, Japan.
Banaras Hindu University, India.
Banaras Hindu University, India.
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2017 (English)In: Journal of Luminescence, ISSN 0022-2313, E-ISSN 1872-7883, Vol. 181, 252-260 p.Article in journal (Refereed) Published
Abstract [en]

Design and synthesis of novel mono-and dimeric quinazoline derivatives (+)-6-methyl-6-pyridin-2-yl-5,6-dihydrobenzo[4,5]imidazo[1,2-c]quinazoline (1) and (+)-6-[(6-methyl-5,6-dihydrobenzo-[4,5]imidazo [1,2-c] quinazolin-6-yl)-pyridin-2-yl]-6-methyl-5,6-dihydro-benzo-[4,5]imidazo-[1,2-c] quinazoline (2) have been described. Both 1 and 2 have been characterized by elemental analyses, FT-IR, H-1 and C-13 NMR, HRMS spectroscopic studies and their structures authenticated by X-ray single crystal analyses. Photophysical properties of these compounds have been studied by UV/VIS absorption and fluorescence spectroscopy and transient photoluminescence analysis in solution, powder, and non-doped (neat) and doped vacuum-deposited films. A broad emission spectrum spanning most of the visible range and good thermal stability indicated promising application of 1 and 2 as OLED emitters. Unfortunately, under current flow we observed rapid device degradation, presumably to be related to free -NH moiety in these compounds. (C) 2016 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 181, 252-260 p.
Keyword [en]
Imidazo-quinazoline; Crystal structure; Photoluminescence; Density functional theory; Excimer/ICT state formation; OLED degradation
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-133097DOI: 10.1016/j.jlumin.2016.09.026ISI: 000387965600037OAI: oai:DiVA.org:liu-133097DiVA: diva2:1055304
Note

Funding Agencies|Department of Science and Technology (DST), New Delhi, India [SR/S1/IC/-25/2011]; DST [IFA12-CH-66]; Cabinet Office, Government of Japan; Japan Society for the Promotion of Science (JSPS)

Available from: 2016-12-12 Created: 2016-12-09 Last updated: 2016-12-12

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