NDLI: Pyrene-based Y-shaped solid-state blue emitters: synthesis, characterization, and photoluminescence.

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Pyrene-based Y-shaped solid-state blue emitters: synthesis, characterization, and photoluminescence.

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Pyrene-based Y-shaped solid-state blue emitters: synthesis, characterization, and photoluminescence.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Feng, Xing Hu, Jian-Yong Yi, Liu Seto, Nobuyuki Tao, Zhu Redshaw, Carl Elsegood, Mark R. J. Yamato, Takehiko
Description	Country affiliation: Japan Author Affiliation: Feng X ( Department of Applied Chemistry, Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga 840-8502, Japan.)
Abstract	A series of pyrene-based Y-shaped blue emitters, namely, 7-tert-butyl-1,3-diarylpyrenes 4 were synthesized by the Suzuki cross-coupling reaction of 7-tert-butyl-1,3-dibromopyrene with a variety of p-substituted phenylboronic acids in good to excellent yields. These compounds were fully characterized by X-ray crystallography, UV/Vis absorption and fluorescence spectroscopy, DFT calculations, thermogravimetric analysis, and differential scanning calorimetry. Single-crystal X-ray analysis revealed that the Y-shaped arylpyrenes exhibited a low degree of πâstacking owing to the steric effect of the bulky tert-butyl group in the pyrene ring at the 7-position, and thus, the intermolecular π-π interactions were effectively suppressed in the solid state. Despite the significantly twisted nonplanar structures, these molecules still displayed efficient intramolecular charge-transfer emissions with clear solvatochromic shifts on increasing solvent polarity. An intriguing fact is that all of these molecules show highly blue emissions with excellent quantum yields in the solid state. Additionally, the two compounds containing the strongest electron-accepting groups, CN (4 d) and CHO (4 f), possess high thermal stability, which, together with their excellent solid-state fluorescence efficiency, makes them promising potential blue emitters in organic light-emitting device applications.
File Format	HTM / HTML
ISSN	18614728
Issue Number	12
Journal	Chemistry - An Asian Journal
Volume Number	7
e-ISSN	1861471X
Language	English
Publisher	Wiley-VCH
Publisher Date	2012-12-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry

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