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Red‐Emitting Delayed Fluorescence and Room Temperature Phosphorescence from Core‐Substituted Naphthalene Diimides
Author(s) -
Kuila Suman,
Ghorai Anaranya,
Samanta Pralok K.,
Siram Raja B. K.,
Pati Swapan K.,
Narayan K. S.,
George Subi J.
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201904651
Subject(s) - phosphorescence , carbazole , photochemistry , fluorescence , naphthalene , quantum yield , acceptor , singlet state , chemistry , molecule , core (optical fiber) , quenching (fluorescence) , materials science , excited state , organic chemistry , physics , atomic physics , composite material , condensed matter physics , quantum mechanics
Unprecedented ambient triplet‐mediated emission in core‐substituted naphthalene diimide (cNDI) derivatives is unveiled via delayed fluorescence and room temperature phosphorescence. Carbazole core‐substituted cNDIs, with a donor–acceptor design, showed deep‐red triplet emission in solution processable films with high quantum yield. This study, with detailed theoretical calculations and time‐resolved emission experiments, enables new design insights into the triplet harvesting of cNDIs; an important family of molecules which has been, otherwise, extensively been investigated for its n‐type electronic character and tunable singlet fluorescence.