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Angew Chem Int Ed Engl. 2019 Jan 28;58(5):1320-1323. doi: 10.1002/anie.201809961. Epub 2018 Dec 20.

Isomerism in Titanium-Oxo Clusters: Molecular Anatase Model with Atomic Structure and Improved Photocatalytic Activity.

Author information

1
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, P. R. China.
2
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P. R. China.

Abstract

Phase isomerism is a common and important phenomenon in inorganic materials, but the molecular isomerism of their nanocluster models is still rare. In this work, we report the first pair of isomeric titanium-oxo clusters. Through combining pentagonal {Ti(Ti5 )} building units in corner-sharing or edge-sharing forms, the two obtained Ti20 -oxo clusters take vertical and horizontal core configurations, respectively, which are both functionalized by the same organic ligands. More interestingly, the vertical type Ti20 -oxo core contains an identical {Ti8 O14 } moiety as anatase, making it the first molecular model of anatase TiO2 . As a result, the vertical type cluster exhibits better photocatalytic H2 evolution activity, higher photocurrent response and faster charge transfer to external acceptors than its horizontal isomer. Thus, this work provides a cluster isomer method to understand the structure-property relationship of import titanium oxide materials.

KEYWORDS:

cluster compounds; isomerism; photocatalysis; structure-activity relationships; titanium

PMID:
30353986
DOI:
10.1002/anie.201809961

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