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Strong Solid‐state Luminescence Enhancement in Supramolecular Assemblies of Polyoxometalate and “Aggregation‐Induced Emission”‐active Phospholium
Author(s) -
Bolle Patricia,
Chéret Yohan,
Roiland Claire,
Sanguinet Lionel,
Faulques Eric,
SerierBrault Hélène,
Bouit PierreAntoine,
Hissler Muriel,
Dessapt Rémi
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801397
Subject(s) - polyoxometalate , stacking , luminescence , supramolecular chemistry , photoluminescence , quenching (fluorescence) , raman spectroscopy , solid state , materials science , fluorescence , photochemistry , crystallography , crystal structure , chemistry , optoelectronics , organic chemistry , physics , quantum mechanics , optics , catalysis
Two new supramolecular fluorescent hybrid materials, combining for the first time [M 6 O 19 ] 2− (M=Mo, W) polyoxometalates (POMs) and aggregation‐induced emission (AIE)‐active 1‐methyl‐1,2,3,4,5‐pentaphenyl‐phospholium ( 1 + ), were successfully synthesized. This novel molecular self‐assembling strategy allows designing efficient solid‐state emitters, such as (1) 2 [W 6 O 19 ] , by directing favorably the balance between the AIE and aggregation‐caused quenching (ACQ) effects using both anion‐π + and H‐bonding interactions in the solid state. Combined single‐crystal X‐ray diffraction, Raman, UV‐vis and photoluminescence analyses highlighted that the nucleophilic oxygen‐enriched POM surfaces strengthened the rigidity of the phospholium via strong C−H⋅⋅⋅O contacts, thereby exalting its solid‐state luminescence. Besides, the bulky POM anions prevented π–π stacking interactions between the luminophores, blocking detrimental self‐quenching effects.