Abstract
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•Synthesis of the DABCO-tetrakis[4(methoxy)phenylporphyrin] cadmium complex.•Molecular structure was determined by single XRD technique.•DFT calculations were used on the structure and spectroscopic analysis.•UV–visible and Fluorescence investigations were made.•Adsorption of methylene blue using Cd-DABCO-porphyrin compound.
In this work, a new cadmium(II) complex namely the (1,4-diazabicyclo[2.2.2]octane)(meso-tetrakis(4-tert-methoxyphenyl)porphyrinato)cadmium(II) with the formula [Cd(TMPP)(DABCO)] (I) (DABCO = 1,4-diazabicyclo[2.2.2]octane) was successfully synthetized. The structure of (I) have been characterized by FT-IR, 1HNMR, UV–visible, fluorescence spectroscopies and single crystal X-ray diffraction technique. DFT calculations has been made for the structural, 1H NMR spectroscopy and IR spectra analysis. The adsorption of methylene blue (MB) dye was studied to examine the efficiently of the [Cd(TMPP)(DABCO)] for removing the cationic dyes from aqueous solution. The Langmuir adsorption capacity (Q0max) at 290 K and pH 7.0 was found to be 69.24 mg.g−1. The adsorption mechanism which involved π-π interaction between the MB dye molecule and the porphyrin ring of (I) is well described by the pseudo second-order and Elovich models.