Photocatalytic and sensing studies of a new metal-organic framework of Ca(II) with phenylmalonic acid

• Published in: Journal of the Indian Chemical Society 2024-12, Vol.101 (12), p.101468, Article 101468
• Main Authors: Anagha, P.B., Kunjumon, Varsha, Shibu Prasad, S., Sheemol, V.N., Biju, S.
• Format: Article
• Language: English
• Subjects: Metal-organic framework; Phenylmalonic acid; Photocatalysis; Photoluminescence
• ISSN: 0019-4522
• DOI: 10.1016/j.jics.2024.101468

A new metal-organic framework of Ca(II) with phenylmalonic acid, [Ca(PMA)]n has been prepared by gel diffusion method. Single crystal X-ray diffraction data show that the crystal belongs to the monoclinic space group C2/c. In the crystal structure, the phenylmalonate ligand adopts bis-monodentate and bidentate coordination modes with the Ca(II) ions. The Ca-phenylmalonate units extend three dimensionally forming a network structure. Thermogravimetric studies confirm that the crystal structure of [Ca(PMA)]n is stable up to 160 °C. Photocatalytic dye degradation studies on methylene blue under sunlight shows 60.8 % degradation efficiency. When the title compound is excited at 260 nm, strong luminescence emission at 290 nm was observed. Sensing property of [Ca(PMA)]n with Fe3+ ions was also investigated. [Display omitted] •A new MOF of Ca(II) with phenylmalonic acid, [Ca(PMA)]n has been prepared by gel diffusion method.•Phenylmalonate ligand adopts bis-monodentate and bidentate coordination modes with the Ca(II) ions•Photocatalytic dye degradation studies on methylene blue under sunlight shows 60.8 % degradation efficiency.•Photoluminescence studies show that the MOF can be used for the sensing of Fe3+ ion at micro level concentration.