ADIMULA VINCENT OLUBADERIN
@unilorin.edu.ng
Lecturer, Faculty of Physical Sciences
Department of Industrial Chemistry, Faculty of Physical Sciences, University of Ilorin, Ilorin, Nigeria
RESEARCH, TEACHING, or OTHER INTERESTS
Inorganic Chemistry, Materials Chemistry
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Sunday E. Elaigwu, Vincent O. Adimula, and Anthony U. Awode
Allerton Press
Margaret D. Olawale, Nathanael D. Ojo, Oluwatoba E. Oyeneyin, Vincent O. Adimula, and Tolutope O. Siyanbola
World Scientific Pub Co Pte Ltd
The cadmium picolinate coordination polymer (CP-2) was synthesized through the reaction of picolinic acid with cadmium acetate dihydrate. CP-2 was characterized using spectroscopic techniques, elemental analysis and powder X-ray diffraction. Variations in melting point, infrared and ultraviolet-visible spectra, along with the results of elemental analysis and powder X-ray diffraction, strongly support the successful formation of the cadmium-picolinic acid CP. The molecular, electronic, optical and adsorption properties of the CP-2 were studied using density functional theory (DFT), time-dependent DFT (TD-DFT), molecular dynamics (MD) and Monte Carlo (MC) simulations. The DFT calculations with B3LYP/LANL2DZ/6-311[Formula: see text]G(d,p) method provided insights into the molecular reactivity and electronic structure, revealing key reactivity parameters (such as frontier orbital energies, energy gap, electronegativity and electrophilicity) and charge distribution within the CP. Dynamic optical calculation was conducted using coupled perturbed Hartree-Fock formalism with DFT/B3LYP/LANL2DZ/6-311[Formula: see text]G(d,p) method. TD-DFT calculations elucidated the electronic absorption properties of the CP, with a low-energy transition at 341 nm. The static [[Formula: see text](0;0,0); [Formula: see text](0;0,0,0)] and dynamic [EOPE: [Formula: see text];[Formula: see text],0)]); SHG: [Formula: see text]2[Formula: see text];[Formula: see text],[Formula: see text]]; EOKE: [Formula: see text];[Formula: see text],0,0); DCSHG: [Formula: see text]2[Formula: see text];[Formula: see text],[Formula: see text],0)] nonlinear optical properties ([Formula: see text] 0.042823 au) displayed large hyperpolarizabilities, suggesting potential applications in SHG and THG. The third-order NLO properties were greater than those of the KH2PO4 (standard). MC simulations explored the adsorption of selected gases (CO2, CH4, H2S, HCHO, NH3) and 2,4-dinitrotoluene (DNT) on the CP-2, revealing strong binding interactions, particularly with H2S. MD simulations further confirmed the stability of the adsorbates on the CP-2 framework.
A. C. Tella, S. O. Owalude, A. B. Alabi, I. Haruna, V. O. Adimula, V. O. Oninla, and S. E. Elaigwu
Springer Science and Business Media LLC
Victoria T. Olayemi, Adetola C. Oladipo, Vincent O. Adimula, and Adedibu C. Tella
Springer Science and Business Media LLC
Vincent O. Adimula, Sunday E. Elaigwu, Samson O. Owalude, Hadley S. Clayton, Adeteju A. Rotifa, Emmanuel Adeniyi, and Adedibu C. Tella
Informa UK Limited
Janet T. Bamgbose, Sunday E. Elaigwu, Vincent O. Adimula, Habeeb O. Okeowo, Victoria T. Olayemi, Olanrewaju A. Ameen, Anthony O. Oyediran, Olusegun A. Odunola, Ezekiel G. Adeyeni, Ayodele D. Adeyemi,et al.
Springer Science and Business Media LLC
Vincent O. Adimula, Adedibu C. Tella, Samson O. Owalude, Adetola C. Oladipo, Victoria T. Olayemi, Emmanuel Adeniyi, Bushra Ismail, Amara Mumtaz, and Asad M. Khan
Informa UK Limited
Abstract Four mixed-ligand complexes were prepared and formulated as [Ln(H2OBA)(H2PZDC)] and [Ln(H2OBA)(H2PDC)] {Ln = La & Gd; H2OBA = 4,4-oxybisbenzoic acid; H2PDC = 2,3-pyridinedicarboxylic acid; H2PZDC = 2,3-pyrazinedicarboxylic acid}. The complexes were modified by a nickel/cobalt impregnation method to generate bimetallic complexes 1–8. Fourier transform infrared (FTIR) spectroscopy analysis of the bimetallic complexes indicated that the carboxylate coordinated to the lanthanide ion via the OH- group while the Ni2+ and Co2+ ions were preferentially bonded to the nitrogen donor ligand via the N- group. Complete catalytic reduction of 4-nitrophenol to 4-aminophenol by the Ni@ complexes gave a maximum reduction time of 37 minutes for complex 1 while complex 7 gave a reduction time of 21 minutes. The rate constants were observed to increase with an increase in temperature up to 50 °C for complexes 3, 5, and 7.
Adedibu C. Tella, Samson O. Owalude, Vincent O. Adimula, Adetola C. Oladipo, Victoria T. Olayemi, Bushra Ismail, Amara Mumtaz, Attiq Ur Rehman, Asad M. Khan, Hadley S. Clayton,et al.
Springer Science and Business Media LLC
Adetola C. Oladipo, Adedibu C. Tella, Victoria T. Olayemi, Vincent O. Adimula, Tendai O. Dembaremba, Adeniyi S. Ogunlaja, Hadley S. Clayton, Guy J. Clarkson, and Richard I. Walton
Wiley
A novel Zn(II) mixed‐ligand complex, Zn(nba)2(meim)2 (1), synthesized from Zn(NO3)2.6H2O, nitrobenzoic acid (Hnba) and 1‐methylimidazole (meim) is reported. The complex was characterized by elemental analysis, FT‐IR, powder and single crystal X‐ray crystallography and TGA/DSC. 1 exhibits a tetrahedral geometry for Zn(II), which is coordinated to two carboxylate oxygen atoms from two nba anions and two imidazole nitrogen atoms from two meim molecules. Thermal analysis shows the stability of 1 up to 260 °C. The adsorption of eosin yellow (EY) dye on 1 was investigated. The adsorption capacity of 1 for EY amounted to 65.32 mg/g, fitting best into Langmuir isotherm and pseudo second order kinetic models. From DFT studies, it was determined that adsorption is predominantly due to electrostatic, hydrogen bonding and π‐π interactions.
Adedibu C. Tella, Victoria T. Olayemi, Folahan A. Adekola, Adetola C. Oladipo, Vincent O. Adimula, Joseph O. Ogar, Eric C. Hosten, Adeniyi S. Ogunlaja, Stephen P. Argent, and Robert Mokaya
Elsevier BV
Adedibu C. Tella, Janet T. Bamgbose, Vincent O. Adimula, Mary Omotoso, Sunday E. Elaigwu, Victoria T. Olayemi, and Olusegun A. Odunola
Springer Science and Business Media LLC
AbstractThe interaction of eosin B dye from aqueous solution with MIL-100(Fe) and functionalized MIL-100(Fe) metal–organic frameworks (MOFs) is reported in this study. MIL-100(Fe) was prepared and functionalized with thioglycolic acid (TH) and ethylenediammine (ED) separately by incorporating the thiol (–SH) and the amine (–NH2) group of the functionalizing agents into the open metal sites of the MIL-100(Fe) to obtain the acidic (TH-MIL-100) and basic (ED-MIL-100) forms of the MOF respectively. Characterization of the MOFs was done by melting point analysis, elemental analysis, spectroscopic techniques, scanning electron microscopy (SEM), and powdered X-ray diffraction (PXRD) analysis. The adsorption experiments were carried out at different conditions such as pH, adsorbent dosage, contact time, temperature, and initial concentration of the dye to estimate the optimum conditions and the maximum adsorption capacities. Adsorption capacities were observed to increase in the order of ED-MIL-100 < MIL-100 < TH-MIL-100, while the TH-MIL-100 was the most effective in the removal process due to acid–base interaction between the acidic thiol group (–SH) and the alkaline medium of eosin B dye solution. The Langmuir Isotherm was seen to fit well to adsorption data obtained for all three adsorbent materials studied, and adsorption processes followed the pseudo-second order kinetics. This study, therefore, indicates the suitability of functionalization of MIL-100(Fe) towards improving its adsorption capacity.
Adedibu C. Tella, Adetola C. Oladipo, Vincent O. Adimula, Victoria T. Olayemi, Tendai O. Dembaremba, Adeniyi S. Ogunlaja, Guy J. Clarkson, and Richard I. Walton
Elsevier BV
A. C. Tella, S. E. Eliagwu, M. Amali, A. T. Kola-Mustapha, S. J. Olatunji, F. Ishola, V. O. Adimula, and O. S. Oluwafemi
Springer Science and Business Media LLC
Adedibu C. Tella, Hussein K. Okoro, Samuel O. Sokoya, Vincent O. Adimula, Sunday O. Olatunji, Caliphs Zvinowanda, Jane C. Ngila, Rafiu O. Shaibu, and Olalere G. Adeyemi
Springer Science and Business Media LLC
Clement Oluseye Ogunkunle, Stephen Oyedeji, Hussein Kehinde Okoro, and Vincent Adimula
Elsevier
Adedibu C. Tella, Margaret D. Olawale, Joshua A. Obaleye, Vincent O. Adimula, Lukman O. Alimi, and Peter A. Ajibade
Springer Science and Business Media LLC
Abstract Adsorptive removal of organic pollutant (pyrene) was carried out using coordination polymer [Cu(Pic)2(H2O)2]·H2O (CP-1) (where “Pic” represents picolinic acid), which was prepared from copper acetate monohydrate and picolinic acid. The compound was characterized by spectroscopic techniques, SEM, elemental and thermal analyses and X-ray crystallographic analysis. The crystal structure of CP-1 shows a centrosymmetric triclinic space group P-1 in which a = 5.0924 (4) Å, b = 7.5172 (6) Å, c = 9.0965 (8) Å. The Cu2+ ion is seen to have an octahedral geometry, which is bonded to oxygen atoms from the picolinic acid and nitrogen atoms from the pyridine rings. Pyrene adsorption from aqueous media was studied with the prepared adsorbent (CP-1). The kinetic model was observed to be second order, and the sorption data fitted best into the Langmuir model. The absorbent, CP-1, was shown to have a 90.91 mg/g adsorption capacity (maximum) for pyrene in this study at 25 °C. Compound CP-1 can thus be presented as a potential adsorbent in the treatment of pyrene-polluted water.
Vincent O. Adimula, Percy C. Onianwa, Omolola Ilupeju, Eric Ayom, and Alafara A. Baba
Informa UK Limited
Levels of some heavy metals were investigated in 114 snack samples consumed in Ibadan city, Nigeria. The concentrations of the selected metals were observed to range widely in the sampled food snacks: cadmium (0.004 to 0.892 mg/kg), cobalt (0.090 to 0.797 mg/kg), chromium (0.015 to 0.702 mg/kg), copper (0.077 to 07.548 mg/kg), iron (0.070 to 65.11 mg/kg), nickel (0.165 to 3.327 mg/kg), lead (0.069 to 1.207 mg/kg), and zinc (0.015 to 94.382 mg/kg). Mean concentrations of the selected heavy metals were found to range from 0.179 mg/kg (observed for cadmium) to 21.632 mg/kg (observed for iron) among the snacks, with iron having the highest level observed in bean cake (62.397 ± 20.10 mg/kg). The levels of the selected heavy metals in the foods were comparable with data reported in studies carried out in other countries. The daily dietary intake of the selected metals for the adult population was observed to differ in the income groups, with the highest intakes observed in the low-income group. For example, dietary intakes of cadmium observed to be 0.080 mg/person/day for the low income group, 0.061 mg/person/day for the middle income group, and 0.040 mg/person/day for the high income group were higher than the range (0.01 to 0.02 mg/person/day) specified by the European Commission (1996).
Adedibu C. Tella, Adetola C. Oladipo, Vincent O. Adimula, Olanrewaju A. Ameen, Susan A. Bourne, and Adeniyi S. Ogunlaja
Royal Society of Chemistry (RSC)
Dinuclear copper(ii) complex [Cu2(BAc)4(QX)2], and 2D zinc(ii) coordination polymer, [Zn(TDPA)2(TMPy)2]n, presented high oxidation and adsorption thermodynamics for dibenzothiophene sulfoxide (DBTO).
Adedibu C. Tella, Samson O. Owalude, Sunday J. Olatunji, Vincent O. Adimula, Sunday E. Elaigwu, Lukman O. Alimi, Peter A. Ajibade, and Oluwatobi S. Oluwafemi
Elsevier BV