Abstract
Two novel transition metal coumarin complexes 'trans-di-aqua-bis (3-acetyl-4-hydroxy-2H-chromen-2-one) Co (II) dihydrate’ (hydco) of the formula C22H14CoO8.4(H2O) and 'trans-di-ethanol-bis (3-acetyl-4-hydroxy-2H-chromen-2-one) Co (II)' (nonhydco) of the formula C22H14CoO8 0.2 (C2 H6O) were synthesized and their structures were characterized by different spectroscopic methods (IR, UV-VIS and fluorescence). Crystal structures of mentioned compounds were solved either from single-crystal at T = 120 K or from powder diffraction data. Further, the Hirshfeld surface analysis and fingerprints reveal that the structure of the non-hydrated complex is dominated by HH (51%) and OH/HO (24.2%) contacts. The structure of the hydrated complex shows that the HH (26.8%) and OH/HO (26.4%) contacts, make the greatest contribution to the Hirshfeld surfaces. Antioxidant tests indicate that the two new hydrated and unhydrated complexes are an effective against the DPPH radicals with very close IC50 values around 0.022 μmol/L and 0.021 μmol/L respectively. The fluorescence behaviours of doped poly (methyl methacrylate) (PMMA) with the non-hydrated complex were studied.
Published Version
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