Abstract

Cyclohexane was directly oxy-functionalised to ϵ-caprolactone through a cascade reaction sequence combining visible-light-driven photocatalysis with cyclohexanone monooxygenase (CHMO) whole-cell biocatalysis. Two available photocatalysts, Au-doped TiO2 (Au-TiO2 ) and graphitic carbonitride (g-C3 N4 ), were evaluated in the experiment and some optimisations to the cascade reaction were applied. In stepwise mode, the highest degree of conversion from cyclohexanol to ϵ-caprolactone can be up to 41 %, with use of g-C3 N4 . The cascade reaction from cyclohexane to ϵ-caprolactone is achievable under a light intensity of 149 μW cm-2 .

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