Photoactive Hexanuclear Molybdenum Nanoclusters Embedded in Molecular Organogels.

Author(s) Del Valle, C.Arnau; Felip-León, C.; Angulo-Pachón, C.A.; Mikhailov, M.; Sokolov, M.N.; Miravet, J.F.; Galindo, F.
Journal Inorg Chem
Date Published 2019 Jul 15

Hexanuclear molybdenum clusters are attractive species because of their outstanding photonic properties, and in the past they have been attached to a variety of supports such as organic polymers and inorganic nanoparticles, as described in the recent literature. Here, a cluster of the formula TBA[MoIAc] (TBA = tetrabutylammonium; Ac = acetate) has been supported on molecular organogels for the first time, resulting in a new soft material with remarkable photoactivity. Electron and confocal microscopic analyses showed the alignment of the nanoclusters to 1D self-assembled fibers formed by the organic gelator, and emission spectroscopy corroborated the interaction of the emissive clusters with such fibrillary structures. The new hybrid system is a deep-red emissive material (phosphorescence maximum at ca. 680 nm), with chromatic coordinates = 0.725 and = 0.274, capable of efficiently generating singlet oxygen (O) upon illumination with white light, as demonstrated by the photooxygenation of 9,10-dimethylanthracene and 1,5-dihydroxynaphthalene. The organogels can been made in dichloromethane and toluene and in both solvents display phosphorescence emission and photocatalytic properties.

DOI 10.1021/acs.inorgchem.9b00916
ISSN 1520-510X
Citation Inorg Chem. 2019;58(14):89008905.

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