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Title: Pyrene appended terpyridine derivatives as electrochemiluminescence material for OLEDs: Characterization of photo-physical, thermal and electrochemical properties
Authors: Umasankar, Gorakala
Busireddy, Manohar Reddy
Kotamarthi, Bhanuprakash
Karunakar, Galla V
Rao, Vaidya Jayathirtha
Keywords: Terpyridine-pyrene derivatives;Fluorescence quantum yield;Delayed fluorescence;Phosphorescence;Thermal stability;Oxidation and reduction potentials;OLED materials
Issue Date: Oct-2020
Publisher: NISCAIR-CSIR, India
Abstract: Three new terpyridine appended pyrene derivatives (Pyr-Tp, Pyr-Ph-Tp, and Pyr-Bp-Tp) have been synthesized by condensation and Suzuki-Miyaura reaction. The photo-physical, electro-chemical and thermal properties of these compounds have been investigated in detail. DFT studies have been carried out to understand the structure-property relationships at the molecular level. Synthesized fluorophores displayed high quantum yield (70-96%) of fluorescence due to triplet to singlet intramolecular energy transfer, delayed fluorescence and positive solvatochromism indicating the presence of intra-molecular charge transfer excited state. In addition, they have high thermal decomposition temperature (Td: 390-450°C), melting temperature (Tm: 180-220°C) and further with suitable oxidation and reduction potentials makes them favourable molecules for OLED fabrications.
Page(s): 1564-1574
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.59B(10) [October 2020]

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