Can some one please suggest suitable solvent for etching/cleaning Vanadium oxytriisoppropoxide (VTIP) solution (a precursor solution dispersed in Isopropyl alcohol)? We have tried etching remaining precursor VTIP with IPA, Acetone, Chlorobenzene, Dimethyl formamide etc, however could not fully clean even after multiple cleaning with variety of solvents. Request your best advice/suggestion.
Suitable etchants for vanadium (V) compounds are seemingly applicable: HNO3, H2SO4, HF, HF + HNO3 and aqua regia.
The above mentioned solvents are strong acids. Is there are any simple solvents that can be used? (like alcohols, ethers, DMF, DMSO etc)
I found a way like this : cover spin coater with tissue papers.
The needed etching/ cleaning for VTIP + C3H8O can be done by the following
NN dimethly aniline, PEG
You can also use thin aluminium foils to cover the spinning cabin its very useful
Vanadium(V) trisisopropoxide oxide (VTIP), can be also etched with hot concentrated (aqueous) phosphoric acid, accordingly:
VO[(CH3)2CHO]3 + H3PO4 → 3(CH3)2CHOH + (VO)PO4
Under favourable experimental conditions, vanadyl(V) phosphate can partially oxidise the formed isopropyl alcohol to acetone while reducing to vanadyl(IV) monohydrogenphosphate:
2VO(PO4) + (CH3)2CHOH → 2VO(HPO4) + (CH3)2CO
Dear Sir, Prince and Carlos. Thank you for sharing useful explanations.Once again, hot phosphoric acid falls into concentrated acid category.
I think you may also consider to begin etching with isopropyl alcohol mixed (approx. 1:2, mol / mol H2O) with water under agitation and moderate heating. Sodium sulphite can then be slowly added until a concentrated isopropyl alcohol upper layer starts to separate over a mild alkaline aqueous solution of higher density, due to ‘salting out’ effect. However, I am not sure about the effectiveness of this approach, because I was unable to find any corroborating reference or to experimentally check. Chemical reasoning suggests that this may be a way to transform vanadium(V) trisisopropoxide oxide (VTIP) to propan-2-ol-oxovanadium(II)(3:1) and acetone, being that accompanied by oxidation of sulphite to sulphate. The following equation tentatively indicates the etching reaction: 2VO[(CH3)2CHO]3 + (CH3)2CHOH + 2H2O + 2Na2SO3 → 2[(3(CH3)2CHOH)·VO] + 2Na2SO4 + (CH3)2CO.
- Badges
- Science topic