Aggregation-Induced Emission and White Luminescence from a Combination of pi-Conjugated Donor-Acceptor Organic Luminogens

Das, Paramita and Kumar, Atul and Chowdhury, Aniket and Mukherjee, Partha Sarathi (2018) Aggregation-Induced Emission and White Luminescence from a Combination of pi-Conjugated Donor-Acceptor Organic Luminogens. In: ACS OMEGA, 3 (10). pp. 13757-13771.

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Abstract

Two new star-shaped phenyl- and triazine-core based donor-acceptor (D-A) type conjugated molecules bearing triphenylamine end-capped arms were synthesized and characterized as imminent organic optoelectronic materials. Photophysical properties of the compounds were explored systematically via spectroscopic and theoretical methods. Because of the presence of donor-acceptor interactions, these luminogens display multifunctional properties, for instance, high extinction coefficient, large stokes shift, and pronounced solvatochromic effect. The compounds also exhibited phenomenon known as aggregation-induced emission on formation of nano-aggregates in the tetrahydrofuran-water mixture. The aggregate formation was confirmed by transmission electron microscopy, scanning electron microscopy, and dynamic light scattering analyses. Moreover, by controlling the electron withdrawing ability of the acceptor, complementary emissive fluorophores (blue and yellow) were achieved. These two complementary colors together span the entire range of visible spectrum (400-800 nm) and therefore when mixed in a requisite proportion generate white light in solution phase. These findings have potential for the progress of new organic white light radiating materials for applications in lighting and display devices.

Item Type:	Journal Article
Publication:	ACS OMEGA
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copy right for this article belong to AMER CHEMICAL SOC
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	28 Nov 2018 15:13
Last Modified:	28 Nov 2018 15:13
URI:	http://eprints.iisc.ac.in/id/eprint/61190

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