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Thermally activated delayed fluorescent (TADF) coordination polymer with the generation of singlet oxygen

Authors :
Gang Yuan Li
Hua Du
Jian Ping Ma
Xiu Hui Ren
Yu Bin Dong
Yan Geng
Source :
Acta Crystallographica Section C Structural Chemistry. 75:758-767
Publication Year :
2019
Publisher :
International Union of Crystallography (IUCr), 2019.

Abstract

4,4′-{9,9′-Spirobi[10H-acridine]-10,10′-diyl}dibenzoic acid (L, C29H26N2O4) 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(μ3-4,4′-{9,9′-spirobi[10H-acridine]-10,10′-diyl}dibenzoato)cadmium(II)], [Cd(C29H24N2O4)(H2O)1.5] n , (I). X-ray crystallographic analysis revealed that this coordination polymer exhibits one-dimensional chains constructed from molecular twist-ring moieties, with Cd2O11 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.

Details

ISSN :
20532296
Volume :
75
Database :
OpenAIRE
Journal :
Acta Crystallographica Section C Structural Chemistry
Accession number :
edsair.doi.dedup.....9665f6f01572000eb90923ac61753d6f