Synthesis, structure and properties of the first organic amine-templated vanadyl pyrophosphate containing two types of helical chains

Abstract The first organic amine templated vanadyl pyrophosphate, [H 2 N(CH 3 ) 2 ] 2 VO(P 2 O 7 ) ( 1 ), has been synthesized at a relatively mild temperature (180 °C) under solvothermal conditions without any pyrophosphates. The structural analysis reveals that compound 1 is constructed by two types of helical chains and protonated dimethylamine cations. Two types of helical chains in 1 are connected through O V O linkages to make a double wave-like [VOP 2 O 7 ] n chain. Magnetic susceptibility measurement of compound 1 indicates antiferromagnetic interactions between V 4 + ions, while the observed SHG efficiency is 0.4 times of urea for 1 .