Process for preparing organically-substituted polyoxometalates
AssigneeThe Curators of the University of Missouri
InventorsZhonghua Peng, Yongge Wei, Bubin Xu
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Abstract
The present invention is generally directed to a process for preparing polyoxometalates having amine-derived substituents attached thereto. In a first embodiment, the process comprises contacting a polyoxometalate and an amine in the presence of a diimide. The present invention is further directed to novel functionalized polyoxometalates prepared by the present process.
Claims105
A process for preparing a polyoxometalate having an amine-derived substituent attached thereto, the process comprising contacting a polyoxometalate and an amine in the presence of a diimide.
An arylamino-substituted polyoxometalate compound having an average composition of the formula:
- wherein:
- (MaOb-d) represents the average composition of the metal-oxygen cluster portion of the substituted polyoxometalate, the substituted polyoxometalate comprising one or more metals, M, which may be the same or different, selected from molybdenum, tungsten, vanadium, niobium, tantalum or a combination thereof;
- and, O is oxygen;
- N is nitrogen;
- R1 is a substituent selected from the group consisting of substituted or unsubstituted iodoarylene, alkynylarylene, N-alkylaminoarylene and N,N-dialkylaminoarylene;
- a represents the number of metal atoms;
- d represents the number of amine-derived substituents on the polyoxometalate;
- b-d represents the number of oxygen atoms, the number of oxygen atoms decreasing as the number of amine-derived substituents increases;
- and,
- q represents the net charge of the substituted polyoxometalate.
A process for preparing a substituted polyoxometalate reaction product, the process comprising contacting, in the presence of a catalyst capable of catalyzing a coupling reaction between a halo-substituted compound and a compound having an unsaturated bond therein, a first reactant polyoxometalate having a substituent bound thereto selected from a halo-substituted hydrocarbyl or a hydrocarbyl having an unsaturated bond therein, with a second reactant compound comprising a halo substituent or an unsaturated bond, with the proviso that when the first reactant polyoxometalate is halo-substituted the second reactant compound comprises an unsaturated bond or vice versa.
A process for preparing a bridged polyoxometalate reaction product, wherein two or more metal-oxygen clusters are linked, the process comprising contacting a first reactant polyoxometalate and a second reactant polyoxometalate, each having a substituent which does not comprises a metal-oxygen bond with the reactant polyoxometalate, the substituent on the first reactant polyoxometalate being different from the substituent on the second reactant polyoxometalate, the two reactant polyoxometalates being contacted in the presence of a catalyst capable of catalyzing a coupling reaction between the two different substituents.
A process for preparing a polyoxometalate having an amine-derived substituent attached thereto, the process comprising contacting a reactant polyoxometalate, a reactant primary or secondary amine, and a reactant activating compound which bonds with a terminal oxygen of the reactant polyoxometalate, forming a leaving group therewith.
A process for preparing a polyoxometalate having an amine-derived substituent bound thereto, the process comprising contacting a polyoxometalate and an amino-substituted diimide.
Dependencies are inferred from the claim text.