Journal
CHEMISTRY OF MATERIALS
Volume 25, Issue 24, Pages 5031-5036Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm401400m
Keywords
vanadoborates; open-framework materials; hxg topology; heterogeneous catalysis; oxidation
Funding
- Swedish Research Council (VR)
- Swedish Governmental Agency for Innovation Systems (VINNOVA) through Berzelii EXSELENT
- National Basic Research Program of China [2013CB933402]
- Diamond Light Source I19
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Three three-dimensional (3D) open-framework vanadoborates, denoted as SUT-6-Zn, SUT-6-Mn, and SUT-6-Ni, were synthesized using diethylenetriamine as a template. SUT-6-Zn, SUT-6-Mn, and SUT-6-Ni are isostructural and built from (VO)(12)O-6 B18O36(OH)(6) clusters bridged by ZnO5, MnO6, and NiO6 polyhedra, respectively, to form the 3D frameworks. SUT-6 is the first vanadoborate with a 3D framework. The framework follows a semiregular hxg net topology with a 2-fold interpenetrated diamond-like channel system. The amount of template used in the synthesis played an important role in the dimensionality of the resulting vanadoborate structures. A small amount of diethylenetriamine led to the formation of this first 3D vanadoborate framework, while an increased amount of diethylenetriamine resulted in vanadoborates with zero-dimensional (0D) and one-dimensional (1D) structures. SUT-6-Zn was proved to be an efficient heterogeneous precatalyst for the oxidation of alkylbenzenes.
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