Photomechanical photochromism in a cetyltrimethylammonium isopolytungstate.

ABSTRACT: The photochromic properties of a hybrid compound comprised of the surfactant cation cetyltrimethylammonium [(C₁₆H₃₃)N(CH₃)₃]⁺ (CTA⁺) and the isopolytungstate anion [H₂W₁₂O₄₀]^6- is investigated. The compound, which has the nominal formula (CTA)₇[H₂W₁₂O₄₀]Cl·2H₂O, changes from white to blue when exposed to UV radiation. The sample returns to the bleached state if stored in the dark-ambient. Application of XPS indicates that the coloring species are W^V and W^IV. The CTA⁺ component is found by XPS and FTIR to undergo progressive and irreversible oxidation during this cycle. Examination of FTIR sugges

SUBMITTER: Colusso AV 

PROVIDER: S-EPMC9080603 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature