Synthesis and redox properties of triarylmethane dye cation salts of anions [M6O19](2-) (M = Mo, W)
Si-Xuan Guo, Jingli Xie, Ryan Gilbert-Wilson, Stephen L Birkett, Alan M Bond, Anthony G Wedd
DALTON TRANSACTIONS | ROYAL SOC CHEMISTRY | Published : 2011
Four salts have been isolated combining the triarylmethane dye cations pararosaniline (PR(+)) and crystal violet (CV(+)) with the hexametalates [M(6)O(19)](2-) (M = Mo, W). A new hexatungstic acid H(2)[W(6)O(19)]·4dma (dma = dimethylacetamide) was isolated and is a useful synthon for hexatungstate salts. Single-crystal X-ray diffraction confirmed the presence of PR(+) and [Mo(6)O(19)](2-) ions in [PR](2)[Mo(6)O(19)]·6dmf (dmf = dimethylformamide). A number of charge-assisted hydrogen bonds N-H···O exist between the cation -NH(2) functions and the anion oxygen atoms. Comparative cyclic voltammetry of salts [A]Cl (A = PR, CV), [Bu(4)N](2)[M(6)O(19)](2-) and A(2)[M(6)O(19)] was established in M..View full abstract
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Awarded by Australian Research Council
The authors are grateful for financial support by the Australian Research Council under grants No. DP0770585 (J. X.) and DP0450134 (A. M. B. and A. G. W.). Ms Michelle Ma is thanked for expert experimental assistance.