decavanadate造句

• Decavanadate is most stable in pH 4 7 region.
• The formation of decavanadate is optimized by maintaining a pH range of 4 7.
• In decavanadate, each V ( V ) center is surrounded by six oxide ligands.
• The decavanadate anions contains three sets of equivalent V atoms ( see fig . 1 ).
• Solutions of vanadate turn bright orange at pH 6.5, indicating the presence of decavanadate.
• The structure of the various protonation states of the decavanadate ion has been examined by 51 V NMR spectroscopy.
• The three protonations of decavanadate have been shown to occur at the bridging oxygen centers, indicated as B and C in figure 1.
• In addition, decavanadate and oxovanadates are species that potentially have many biological activities and that have been successfully used as tools in the comprehension of several biochemical processes.
• It is associated calcite, corvusite, hewettite, hughesite, montroseite, munirite, paramontroseite, pascoite, rossite, sherwoodite, and other unidentified vanadium phases as well as at least two other potentially new decavanadate species.
• These solutions contain mainly the ions HVO 4 2 " and V 2 O 7 4 " between pH 9 and pH 13, but below pH 9 more exotic species such as V 4 O 12 4 " and HV 10 O 28 5 " ( decavanadate ) predominate.