Spectral characterizations and photophysical properties of one-step synthesized blue fluorescent 4 `-aryl substituted 2,2 `:6 `,2 `'-terpyridine for OLEDs application


Autoria(s): Lakshmanan, Raja; Shivaprakash, Narayanapura Chennegowda; Nair, Sindhu Sukumaran
Data(s)

2015

Resumo

We have synthesized a series of 4'-aryl substituted 2,2':6',2 `'-terpyridine (terpy) derivatives, namely 4'-(4-methylphenyl)-2,2':6',2 `'-terpyridine (C-1), 4'-(2-furyl)-2,2':6'2 `'-terpyridine (C-2), and 4'-(3,4,5-trimethoxyphenyl)-2,2':6',2 `'-terpyridine (C-3). The synthesized terpy compounds were characterized by elemental analyses, FTIR, NMR (H-1 and C-13), and ESI-Mass spectrometry. Photophysical, electrochemical and thermal properties of terpy compounds were systematically studied. Maximum excitation band was observed between 240 and 330 nm using UV-visible spectra, and maximum emission peaks from PL spectra were observed at 385, 405 and 440 nm for C-1, C-2 and C-3 respectively. Fluorescence lifetime (tau) of the fluorophores was found to be 035 and 1.55 ns at the excitation wavelength of 406 nm for C-1 and C-2 respectively, and tau value for C-3 was found to be 0.29 ns at the excitation wavelength of 468 nm. We noticed that the calculated values of HOMO energy levels were increased from 5.96 (C-1) to 6.08 (C-3) eV, which confirms that C-3 derivative is more electrons donating in nature. The calculated electrochemical band gaps were 2.95, 2.82 and 3.02 eV for C-1, C-2 and C-3 respectively. These blue fluorescent emitter derivatives can be used as an electron transport and electroluminescent material to design the blue fluorescent organic light emitting diode (OLED) applications. (C) 2015 Elsevier B.V: All rights reserved.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/52753/1/Jou_Lum_168_145_2015.pdf

Lakshmanan, Raja and Shivaprakash, Narayanapura Chennegowda and Nair, Sindhu Sukumaran (2015) Spectral characterizations and photophysical properties of one-step synthesized blue fluorescent 4 `-aryl substituted 2,2 `:6 `,2 `'-terpyridine for OLEDs application. In: JOURNAL OF LUMINESCENCE, 168 . pp. 145-150.

Publicador

ELSEVIER SCIENCE BV

Relação

http://dx.doi.org/10.1016/j.jlumin.2015.08.005

http://eprints.iisc.ernet.in/52753/

Palavras-Chave #Instrumentation and Applied Physics (Formally ISU)
Tipo

Journal Article

PeerReviewed