A simple synthetic route to polyoxovanadatebased organic-inorganic hybrids using EEDQ as an ester coupling agent

A reaction strategy for the post-functionalization of hexavanadate derivatives is presented herein. In this study, five polyoxovanadate-based organic-inorganic hybrids TBA(2)[V6O13{(OCH2) 3CCOO(CH2)(15)CH3)(2) (2), TBA(2)[V6O13{(OCH2)(3)CCOO(CH2)(8)CH=CH2)(2)] (3), TBA(2)[V6O13{(OCH2)(3)CCOOCH2CF3}(2)] (4), TBA(2)[V6O13{(OCH2)(3)CCOO(CH2CH2O)(3)CH3}(2)] (5), and TBA(2)[V6O13{(OCH2)(3)CCOO(CH2)(12)OH}2]. 2CH(3)CH(2)OH (6) were successfully synthesized via esterification of carboxylic acid groups-containing TBA(2)[V6O13{(OCH2)(3)-CCOOH}(2)] (1) with five alcohols possessing different functional groups. These hybrids were characterized by single crystal X-ray diffraction, IR, ESI-MS, H-1 and C-13-NMR spectroscopies, and elemental analysis. Moreover, the formation of large vesicles was observed in a mixed solution of compound 2 due to its surfactant-like structure.