Crystal growth, characterization and sensing studies of a new metal-organic framework of Sr(II) with phenylmalonic acid

• Published in: Polyhedron 2024-12, Vol.264, p.117231, Article 117231
• Main Authors: Anagha, P.B., Shibu Prasad, S.
• Format: Article
• Language: English
• Subjects: Crystal growth; Metal-organic framework; Phenylmalonic acid; Photoluminescence
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2024.117231

Crystals of {[Sr(PMA)(H2O)].H2O}n is prepared by gel diffusion method by the reaction between phenylmalonic acid and strontium nitrate. Crystals formed inside the gel has three dimensional network structure. Photoluminescence studies show that intensity of emission of the title compound is quenched by Fe3+ ion. Quenching effect depends on the concentration of Fe3+ ion. [Display omitted] •A new MOF of Sr(II) with phenylmalonic acid, {[Sr(PMA)(H2O)].H2O}n has been prepared.•Phenylmalonate ligand adopts monodentate, bis-monodentate and bidentate coordination modes with Sr(II) ions.•Intermolecular hydrogen bonding further stabilizes the crystal system.•Photoluminescence studies show that the Sr-MOF can be used for the sensing of Fe3+ ion at micro level concentration. A new metal-organic framework of Sr(II) with phenylmalonic acid, {[Sr(PMA)(H2O)].H2O}n (SPMA) has been prepared by gel diffusion technique. SXRD data show that the crystal belongs to the orthorhombic space group Pbca. In the crystal structure, the phenylmalonate ligand adopts monodentate, bis-monodentate and bidentate coordination modes with the Sr(II) ions. The Sr-phenylmalonate units extend three dimensionally forming a network structure. Intermolecular hydrogen bonding further stabilizes the crystal system. The compound exhibits strong luminescence emission at 290 nm upon excitation at 240 nm. Sensing property of the title compound towards Fe3+ ion is also investigated.