Core-Substituted Pyromellitic Diimides: A Versatile Molecular Scaffold for Tunable Triplet Emission DOI
Sopan M. Wagalgave,

Anju Ajayan Kongasseri,

U.P. Singh

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Arylene diimides represent a versatile class of n-type organic semiconductors, widely recognized for tunable photophysical properties, making them highly relevant across various optoelectronic applications. While their fluorescence can be finely modulated through core substitution, triplet-state emission has received comparatively little attention. This is particularly surprising given the growing field ambient-organic triplet harvesting materials, such as thermally activated delayed and phosphorescent systems, which would greatly benefit from structural modifications to π-conjugated backbone substitution arylene achieve desired properties. Realizing states within family molecules crucial advancing triplet-based materials applications in lighting, photocatalysis, beyond. In this context, we present an unprecedented study demonstrating pyromellitic diimides, smallest member diimide family, with accessible emissive state due narrow singlet-triplet energy gap. Herein, report synthesis series core-substituted (cPmDIs) using diverse synthetic strategies. Core not only induces wide spectrum colors but, notably, enables wide-range phosphorescence spanning visible spectrum, depending on substituent. article details electrochemical characterization library cPmDIs, supported by theory. Furthermore, demonstrate potential molecular design achieving ambient-orange phosphorescence, exemplified thiophenyl-cPmDI derivative, exhibits crystalline film minimizing vibrational dissipation. regard, envision that represents significant step toward predictive structure-property phosphors materials.

Language: Английский

Core-Substituted Pyromellitic Diimides: A Versatile Molecular Scaffold for Tunable Triplet Emission DOI
Sopan M. Wagalgave,

Anju Ajayan Kongasseri,

U.P. Singh

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Arylene diimides represent a versatile class of n-type organic semiconductors, widely recognized for tunable photophysical properties, making them highly relevant across various optoelectronic applications. While their fluorescence can be finely modulated through core substitution, triplet-state emission has received comparatively little attention. This is particularly surprising given the growing field ambient-organic triplet harvesting materials, such as thermally activated delayed and phosphorescent systems, which would greatly benefit from structural modifications to π-conjugated backbone substitution arylene achieve desired properties. Realizing states within family molecules crucial advancing triplet-based materials applications in lighting, photocatalysis, beyond. In this context, we present an unprecedented study demonstrating pyromellitic diimides, smallest member diimide family, with accessible emissive state due narrow singlet-triplet energy gap. Herein, report synthesis series core-substituted (cPmDIs) using diverse synthetic strategies. Core not only induces wide spectrum colors but, notably, enables wide-range phosphorescence spanning visible spectrum, depending on substituent. article details electrochemical characterization library cPmDIs, supported by theory. Furthermore, demonstrate potential molecular design achieving ambient-orange phosphorescence, exemplified thiophenyl-cPmDI derivative, exhibits crystalline film minimizing vibrational dissipation. regard, envision that represents significant step toward predictive structure-property phosphors materials.

Language: Английский

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