Photoactive hexanuclear molybdenum nanoclusters embedded in molecular organogels

Arnau Del Valle, Carla, Felip-León, Carles, Angulo-Pachón, César A., Mikhailov, Maxim, Sokolov, Maxim N., Miravet, Juan F. and Galindo, Francisco (2019) Photoactive hexanuclear molybdenum nanoclusters embedded in molecular organogels. Inorganic Chemistry, 58 (14). pp. 8900-8905. ISSN 0020-1669

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Abstract

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 TBA2[Mo6I8Ac6] (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 x = 0.725 and y = 0.274, capable of efficiently generating singlet oxygen (1O2) 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.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
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Depositing User: LivePure Connector
Date Deposited: 31 Oct 2019 15:40
Last Modified: 09 Sep 2020 23:59
URI: https://ueaeprints.uea.ac.uk/id/eprint/72818
DOI: 10.1021/acs.inorgchem.9b00916

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