Olayemi, V. T and Tella, A. C and Adekola, F. A and Clayton, H. S. and Clayton, H. S. and Oladipo, A. C. and Mehlana, G. and Ogunlaja, A. S. and Oluwafemi, O. S and Ogar, J. O and Argent, S. P. and Mokaya, R. (2020) A Co-Crystallised Cobalt(II) Cluster of Pyridinedicarboxylic Acid (PDC) as a Luminescent Material for Selective Sensing of Methanol. Journal of Fluorescence, 31. pp. 1177-1190.
Full text not available from this repository. (Request a copy)Abstract
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 1 is a mixture of complexes that crystallizes in the triclinic space group P-1 and the geometry around the Co(II) ions is octahedral. The structure is extensively imbued with hydrogen bonding that helps in stabilizing the complex. Thermogravimetric analysis indicates that 1 is thermally stable up to 364 οC. The luminescence properties of 1 revealed a strong emission centered at 437 nm (λex = 345 nm) assigned to ligand to metal charge transfer (LMCT). The luminescence sensing of 1 towards volatile organicmolecules were also examined. However, 1 displayed a turn off towards methanol compared to othermolecules with high quenching efficiency and low limit of detection (3.5 × 10−4 vol%). The results show excellent selectively and high sensitivity. Powder X-ray diffraction studies revealed that the structural integrity of the complex was maintained after exposure to methanol vapour. Theoretical studies also revealed small binding energy (−413.2 au) and low energy gap (1.19) for 1-CH3OH adduct.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QD Chemistry |
| Depositing User: | Mrs Adetola Oladipo |
| Date Deposited: | 13 Jul 2021 15:46 |
| Last Modified: | 13 Jul 2021 15:46 |
| URI: | https://eprints.lmu.edu.ng/id/eprint/3432 |
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