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Thermally activated delayed fluorescent (TADF) coordination polymer with the generation of singlet oxygen
Author(s) -
Ren Xiu-Hui,
Li Gang-Yuan,
Du Hua,
Ma Jian-Ping,
Geng Yan,
Dong Yu-bin
Publication year - 2019
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229619006119
Subject(s) - quantum yield , singlet oxygen , dihedral angle , moiety , coordination polymer , fluorescence , crystallography , stacking , chemistry , ligand (biochemistry) , acceptor , molecule , photochemistry , materials science , stereochemistry , oxygen , crystal structure , hydrogen bond , organic chemistry , physics , receptor , biochemistry , quantum mechanics , condensed matter physics
4,4′‐{9,9′‐Spirobi[10 H ‐acridine]‐10,10′‐diyl}dibenzoic acid ( L , C 29 H 26 N 2 O 4 ) was designed and synthesized as a new donor–acceptor motif molecule. Due to the large dihedral angle between the planes of the carboxyphenyl group and the spiroacridine moiety, L possess thermally activated delayed fluorescence (TADF). By applying L as a ligand and using Cd as a metal connector, we synthesized the coordination polymer catena ‐poly[hemi‐μ‐aqua‐aqua(μ 3 ‐4,4′‐{9,9′‐spirobi[10 H ‐acridine]‐10,10′‐diyl}dibenzoato)cadmium(II)], [Cd(C 29 H 24 N 2 O 4 )(H 2 O) 1.5 ] n , ( I ). X‐ray crystallographic analysis revealed that this coordination polymer exhibits one‐dimensional chains constructed from molecular twist‐ring moieties, with Cd 2 O 11 clusters as the connection nodes. The stacking pattern of the two‐dimensional network was formed by C—H…π interactions in the solid state. Similar to L , ( I ) presents a sky‐blue TADF emission, together with a photoluminescence quantum yield (PLQY) of 40%. It is worth noting that the photocatalytic activity toward the generation of singlet oxygen of this coordination polymer is confirmed.