Synthesis and crystal structure of the dimeric, Ti–O–Ti bridged hydrid form polyoxoanion [α-1,2-PW10Ti2O39]210−

The reaction of trivacant precursor Na9[A–PW9O34]·19H2O with Ti(SO4)2 affords the novel dimeric, di-TiIV-substituted tungstophosphate K4Na6[α-1,2-PW10Ti2O39]2·14H2O. The X-ray structural determination shows the dimeric, anhydride structure was formed by two Ti–O–Ti bonds linking two di-titanium-substituted Keggin anion [α-1,2-PW10Ti2O40]. It was also characterized by elemental analysis, TGA, FT-IR and UV–vis spectroscopies.