TiO2/ZnWO3 with improved photocatalytic performance in the preparation of chromeno[4,3-b]chromenes, as cardiovascular drugs.

• TiO 2 /ZnWO 3 shows excellent photocatalytic activity in the synthesis of chromenes. • A commercially available and cheap light source is used. • TiO 2 /ZnWO 3 nanoparticles show sufficient stability and reusability. Chromeno[4,3-b]chromenes have shown potential as effective drugs against cardiovascular diseases, primarily due to their diverse biological activities, including anti-inflammatory and antioxidant properties. This study was conducted on a new heterojunction nanocomposite TiO 2 /ZnWO 3 consisting of titanium dioxide (TiO 2) and zinc tungstate (ZnWO 3) with enhanced photocatalytic capability. TiO 2 /ZnWO 3 nanophotocatalyst is characterized by FT-IR, XRD, DRS, SEM, and EDX and performed as an efficient nanophotocatalyst in the synthesis of chromeno[4,3-b]chromene derivatives. The research focused on the intricate interplay of the components, aiming to optimize the catalytic reactions under green-light irradiation. Through this investigation, insights were gained into the mechanistic pathways and the potential for improved yields in the formation of the desired chromene. TiO 2 has the ability to absorb light and produce electrons and holes when exposed to the direct light; but to increase its photocatalytic activity, an additional component ZnWO 3 is combined. Effect of photocatalyst amount, reaction time, temperature, and solvent as well as reusability of the nanocomposite are investigated. The research focused on the intricate interplay of the components, aiming to optimize the catalytic reactions under green-light irradiation. Through this investigation, insights were gained into the mechanistic pathways and the potential for improved yields in the formation of the desired chromene. TiO 2 has the ability to absorb light and produce electrons and holes when exposed to the direct light; but to increase its photocatalytic activity, an additional component ZnWO 3 is combined. Effect of photocatalyst amount, reaction time, temperature, and solvent as well as reusability of the nanocomposite are investigated. The new heterojunction nanocomposite TiO 2 /ZnWO 3 photocatalyst prepared and characterized by FT-IR, XRD, DRS, SEM, and EDX. Then, this nanomaterial was performed as an efficient nanophotocatalyst in the synthesis of chromeno[4,3-b]chromene derivatives. Through this investigation, insights were gained into the mechanistic pathways and the potential for improved yields in the formation of the desired chromene. Effect of photocatalyst amount, reaction time, temperature, and solvent as well as reusability of the nanocomposite are also investigated. [Display omitted] [ABSTRACT FROM AUTHOR]

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