The Functionalization of Trialkoxo Hexavanadates, the Treasure at the End of the Great Route
Journal Title: Archives of Organic and Inorganic Chemical Sciences - Year 2018, Vol 1, Issue 5
Abstract
Polyoxometalates are well-known for the unique topological structures and functional activities of the pure inorganicor inorganic-organic clusters. As an important branch of polyoxometalates chemistry, polyoxovanadates (POVs), especially the Lindquist-type POVs have attracted much more interests due to its excellent application in catalysis, magnetism, and biology and photo chemical activity. During the past decades, the functionalization of POVs has attracted increasing attention and their electronic, magnetic properties, potential catalytic capabilities and bioactivities have been widely studied [1-3] .The Lindquist- type alcohol-hexavanadates are the largest subclass of the POV derivatives, in which the hexavanadate core {V6O19} is stabilized by trios legends (HOCH2)3CR (R = -CH3, -NO2,-CH2OH, etc.). The pioneer investigation of these derivatives were mainly done by Zubieta [4-6].. And Miller [7].The first and most common examples of trialkoxo-hexavanadates [(n-Bu)4N]2[V6O13{(OCH2)3CR}2] reported by Zubieta (Figure 1). In 1990 were prepared by solvent reaction of de cavanadate salts and trios legends. In their anion structures, two trialkoxo legends coordinated to three vanadium ions in a triangular arrangement, occupying the two opposite faces of the hexavanadate core. By adding different resultants into the reaction system, mixed-valence or fully reduced hexavanadate derivatives can be obtained [5,7] . Except for di-substituted trialkoxo-hexavanadates, Zubieta also reported the hexavanadates are stabilized by three or four trialkoxo legends prepared through hydrothermal reaction of vanadium oxides, trios legends and different mineralize in reagents [6]. Although the researches of POV derivatives have been last for a long period, the progress in the field was still slow compared to the poly oxomolybdates and polyoxotungstates. The controllable synthesis of the POV hybrids is still a challenging task as it always faces difficulties such as unexpected side reactions and low yield of the target products due to the high valence of the vanadium atom. In this case, post-functionalization strategy could be a more promising way as it won't involve the reconstruction of the POV clusters and can reduce side reactions [8].
Authors and Affiliations
Zicheng Xiao, Bo Huang, Wang Nan, Pingfan Wu
Keywords
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- EP ID EP600458
- DOI 10.32474/AOICS.2018.01.000125
- Views 76
- Downloads 0
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