Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Synthesis and characterization of highly soluble blue emitting poly(2-vinylanthracene) with 9,10-di(2-naphthalenyl) and 9,10-di(3-quinolinyl) substituents

Language

English

Abstract

Two new blue fluorescent polymers poly(910-di(2-naphthalenyl)-2- vinylanthracene) (P(2ADN)) and poly(9,10-di(3-quinolinyl)-2-vinylanthracene) (P(3ADQ)), were polymerized from free radical solution addition polymerization with Mn = 21,500 and 15,400, respectively. The polymers are highly soluble in common organic solvents while P(3ADQ) is also soluble in polar solvents including a 1/1 mixture of ethanol/water. Both polymers are amorphous with excellent thermal stability (Tg (Midpoint) = 343 C and 298 C for P(2ADN) and P(3ADQ), respectively). P(2ADN) exhibited three prominent absorption bands in tetrahydrofuran (364, 383 and 403 nm) and is similar to that of P(3ADQ) (369, 384 and 404 nm). The solid-state Commission Internationale d'Eclairage (CIEx,y) color coordinates for illumination were (0.15, 0.10) for P(2ADN) and (0.15, 0.13) for P(3ADQ) which lied within the requirements for a true blue display color. The photoluminescence (PL) of the polymers red-shifted 16-17 nm from their respective pendant chromophore 2-methyl-9,10-di(2-naphthalenyl)anthracene (2MADN) and 2-methyl-9,10-di(3- quinolinyl)anthracene (3MADQ) and can be attributed to partial π-π stacking between the adjacent aromatic pendant groups in the polymer chains. The luminescences of 3MADQ and P(3ADQ) are sensitive to pH and the pKa for the alkalescent 3MADQ and P(3ADQ) calculated was 2.4 and 2.7, respectively. Both polymers have similar band-gap energy (Eg) between 2.88 and 2.91 eV, while the LUMO/HOMO for P(3ADQ) is shifted slightly downward -0.06 to -0.03 eV compared to P(2ADN). The mobility (μhole) of the two polymers were measured to be 4.0 × 10-7 and 10-8 cm 2/(V-s) for P(2ADN) and P(3ADQ), respectively. © 2013 Elsevier B.V. All rights reserved.

Keywords

2-Methyl-910-di(2-naphthalenyl)anthracene, 2-Methyl-910-di(3- quinolinyl)anthracene pH sensitive photoluminescent, Blue fluorescent polymers, Poly(910-di(2-naphthalenyl)-2-vinylanthracene), Poly(910-di(3-quinolinyl)-2- vinylanthracene)

Publication Date

2013

Source Publication Title

Dyes and Pigments

Volume

99

Issue

1

Start Page

105

End Page

115

Publisher

Elsevier

DOI

10.1016/j.dyepig.2013.04.021

ISSN (print)

01437208

ISSN (electronic)

18733743

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