A Co-Crystallised Cobalt(II) Cluster of Pyridinedicarboxylic Acid (PDC) as a Luminescent Material for Selective Sensing of Methanol

A luminescent Cobalt(II) co-crystal [Co13(PDC)16(H2O)24.7H2O] 1 (where H2PDC = 2,6-pyridinedicarboxylic acid) have been prepared by oven-heating and slow evaporation of solvent. Single crystal X-ray diffraction (SCXRD) analysis revealed that is a mixture complexes crystallizes in the triclinic space group P-1 geometry around Co(II) ions octahedral. The structure extensively imbued with hydrogen bonding helps stabilizing complex. Thermogravimetric indicates thermally stable up to 364 οC. luminescence properties strong emission centered at 437 nm (λex 345 nm) assigned ligand metal charge transfer (LMCT). sensing towards volatile organic molecules were also examined. However, displayed turn off methanol compared other high quenching efficiency low limit detection (3.5 × 10−4 vol%). results show excellent selectively sensitivity. Powder studies structural integrity complex was maintained after exposure vapour. Theoretical small binding energy (−413.2 au) gap (1.19) for 1-CH3OH adduct.