Title:	New cyanopyridone-based unsymmetrical dyads: the effect of donor strength on their optoelectronic properties†
Authors:	Vinayakumara, D.R. Kesavan, Rajalakshmi Kumar, Sandeep Adhikari, A.V.
Issue Date:	1-Aug-2019
Publisher:	The Royal Society of Chemistry
Citation:	Photochemical & Photobiological Sciences,2019, Vol.18, p2052–2060
Abstract:	Herein, we describe the design, synthesis and optoelectronic characterization of a new series of highly fluorescent dyes configured with a D-A-D' architecture, viz. CP1 to CP7. In the new molecular design, various electron-donating scaffolds were integrated with an efficient electron-accepting trialkoxyphenyl substituted cyanopyridone moiety to study the effect of donor strength on their thermal and opto-physical properties. A detailed investigation of their thermal properties reveals that they are thermally robust with high melting and decomposition temperatures. Furthermore, in-depth photophysical studies expose their remarkable fluorescence ability in both solution and aggregated state within a wide spectral range from blue to orange. Evidently, among all the fluorophores, dyads bearing amino donors were found to be highly intense emitters due to their superior donating strength. Furthermore, solvatochromic studies showcase their ICT-dominated optoelectronic properties and it was confirmed by different correlation studies. Finally, the experimental results were correlated with their quantum chemical simulation data.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/7297
ISSN:	1474-905X 1474-9092
Alternative Location:	https://doi.org/10.1039/C9PP00046A
Copyright:	2019 The Royal Society of Chemistry and Owner Societies
Appears in Collections:	Research Papers (SCM)

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