Prof. Obasi Nnamdi Lawrence.

Department: Pure And Industrial Chemistry
Faculty: Physical Sciences
Designation : Professor
Email: nnamdi.obasi@unn.edu.ng
Phone: +2348037717717


Publications (Articles and Journals):

1. L. N. Obasi; (2005): Problems Associated with canned food, Chemistry in Nigeria, 2 (3), 16-

17.

2. P. O. Ukoha, E. C. Okafor, J. N. Asegbeloyin and L. N. Obasi; (2007): Synthesis and

spectroscopic characterization of 4-chloroacetyl-3-methyl-1-phenylpyrazol-5-one and its iron

(III) complex, International Journal of Chemistry, 17 (3), 217-221.

3. L. N. Obasi, P. O. Ukoha, E. O. Omeje and O. C. Esimone; (2009): Synthesis and

Antimicrobial Spectrum of some N-(thiazol-2-yl)sulphonamide and their uranylacetate

complexes, Journal of Chem. Soc. Nigeria, 34 (2), 162-167.

4. L. N. Obasi, C. A. Nwadinigwe and J. N. Asegbeloyin; (2008): Determination of trace heavy

metals in fluted pumpkin leaves grown on soil treated with sewage sludge and effluents, Book of

Proceedings, 31 st International conf. of chemical Society of Nigeria pp. 241-244.

5. P. M. Ejikeme, L. N. Obasi and A. C. C. Egbuonu; (2010): Physico-chemical and toxological

studies on Afzelia Africana seed oil, African Journal of Biotechnology, 9 (13), 1959-1963.

6. A. E. Ochonogor and L. N. Obasi; (2010): Activated carbon from gmelina wood, Journal of

Chem. Soc. Nigeria, 35 (1), 171-176.

7. A. C. C. Egbuonu, P. M. Ejikeme and L. N. Obasi; (2010): Monosodium glutamate: Potentials

at inducing prostate pathologies in male Wistar rats, African Journal of Biotechnology, 9 (36),

pp. 5950-5954.  

8. L. N. Obasi, A. C. C. Egbuonu, P. O. Ukoha and P. M. Ejikeme; (2010): Comparative

Phytochemical and Antimicrobial Screening of some solvent extracts of Samanea saman

(fabaceae or mimosaceae) pods, African Journal of Pure and Applied Chemistry 4 (9), pp. 206-

212.

9. P. O. Ukoha, L. N. Obasi and A. Oluah; (2010): Inner-Sphere Oxidation of Thiophenol by

Bis(Salicylideneiminato) sulphatocerium(IV) in Aqueous Perchloric Acid Medium,

International Journal of Chemistry, 20 (1), 29-36.

 

10. P. O. Ukoha, C. U. Alioke, L. N. Obasi and K. F. Chah; (2011): Synthesis, Spectroscopic

Characterization and Preliminary Antimicrobial Studies of Fe(III) and Ni(II) complexes of two

Thiolates; 2,6-diamino-3,5-dithiodiphenoyl pyridine (DDPP) and phenoylbenzylmercaptan

(PBM), International Journal of Chemistry, 21 (1), 89-98.

11. P. O. Ukoha, C. U. Alioke, L. N. Obasi and K. F. Chah; (2011): Synthesis, Spectroscopic

Characterization and Preliminary Antimicrobial Studies of Mn(II) and Cu(II) Complexes of two

Thiolates; s,s’-(2,6-diaminopyridine-3,5-diyl) dibenzenecarbothioate (DBCT) and s-Benzyl

benzenecarbothioate (BBCT), E-Journal of Chemistry, 8(1), 231-239.

http://dx.doi.org/10.1155/2011/214870

12. L. N. Obasi, P. O. Ukoha and K. F. Chah; (2010): Synthesis of Some Sulphonyl Derivatives

of 2-aminothiazole and Antimicrobial Screening, Journal of Chem. Soc. Nigeria, 35 (1), 190-

193.

13. L. N. Obasi, P. M. Ejikeme, and A. C. C. Egbuonu; (2011): Antimicrobial and

Phytochemical Evaluation of Methanolic Extract and Fractions of Jatropha Curcas Linn

(Eurphorbiaceae) Stem Bark, African Journal of Pure and Applied Chemistry 5 (5), pp. 92-96.

14. L. N. Obasi, P. O. Ukoha and K. F. Chah; (2011): Synthesis, Spectroscopic Characterization

and Antimicrobial Screening of N-(thiazol-2-yl)ethanesulphonamide and its nickel (II) and

cobalt (II) complexes, Journal of Chem. Soc. Nigeria, 36 (1), 138-144.

15. L. N. Obasi, P. O. Ukoha, A. O. Anaga and K. F. Chah; (2011): Synthesis, Spectroscopic

Characterization and Antibacterial Screening of Novel N-(Benzothiazol-2-yl)ethanamides, Asian

Journal of Chemistry, 23 (5), pp. 2043-2045.

16. L. N. Obasi, P. O. Ukoha and K. F. Chah; (2011): Synthesis, Spectroscopic Characterization

and Antimicrobial Screening of N-(thiazol-2-yl)-4-chlorobenzensulphonamide and its nickel (II)

and cobalt (II) complexes, Journal of Chem. Soc. Nigeria, 36 (1), 102-109.

17. A. C. C. Egbuonu, P. M. Ejikeme and L. N. Obasi; (2010): Influence of sub-chronic oral

exposure to high monosodium glutamate on some serum markers of the renal functions in male

Wistar rats, African Journal of Biochem Research, 4 (9), 225-228.

 

18. P. O. Ukoha, E.N. Dim and L. N. Obasi ; (2012): Corrosion Inhibitive Properties and

Adsorption behaviour of acetone extract of Anacardium occidentale on Mild Steel and

aluminium in HCl, Asian Journal of Chemistry, 24 (5), 1899-1905.

19. P. O. Ukoha, A. C. C. Egbuonu, L. N. Obasi and P. M. Ejikeme; (2011): Tannins and other

Phytochemical of the Samanaea saman pods and their Antimicrobial Activities, African Journal

of Pure and Applied Chemistry 5 (8), 237-244.

20. P. O. Ukoha, F. I. Nwabue and L. N. Obasi; (2011): Solvent Extraction Studies on

Copper(II) and Silver(I) Complexes of Bis(4-hydroxypent-2-ylidene)diaminoethane:

 

Composition of Extracted Copper(II) Species, E-Journal of Chemistry, 8(4), 1864-1871.

http://dx.doi.org/10.1155/2011/582649

21. P.O.Ukoha, L. N. Obasi and F. I. Nwabue; (2012): Solvent Extraction Studies on Copper(II)

and Silver(I) Complexes of Bis(4-hydroxypent-2-ylidene)diaminoethane: Separation of Ag(I)

from Cu(II), International Journal of Chemistry, 22(1), 15-24.

22. L. N. Obasi, Okoye C. O. Benedict, P. O. Ukoha, and A. O. Anaga; (2012): Syntheses,

Characterization, and Antimicrobial Screening of N-(benzothiazol-2- yl)benzenesulphonamide

and its Cu(I), Ni(II), Mn(II), Co(II), and Zn(II) Complexes, E-Journal of Chemistry, 9(4), 2354-

2370. http://dx.doi.org/10.1155/2012/496541

23. L. N. Obasi, C. O. B. Okoye, P. O. Ukoha, and K. F. Chah; (2013): Syntheses,

Characterization and Antimicrobial Screening of N-(benzothiazol-2- yl)-2,5-

dichlorobenzenesulphonamide and its Cu(I), Ni(II), Mn(II), Co(III) and Zn(II) Complexes,

Asian Journal of Chemistry, 25 (5), 2199-2207.

24. L. N. Obasi, C. O. B. Okoye, P. O. Ukoha, and K. F. Chah; (2013): Syntheses,

Characterization and Antimicrobial Screening of N-(benzothiazol-2- yl)-4-

methylbenzenesulphonamide and its Cu(I), Ni(II), Mn(II), Co(III) and Zn(II) Complexes, Asian

Journal of Chemistry, 25 (5), 2369-2376.

25. L. N. Obasi, C. O. B. Okoye, and A. O. Anaga; (2014): Syntheses, Characterization, and

Antimicrobial Screening of N-(benzothiazol-2-yl)-2-nitrobenzenesulphonamide and its Cu(I),

Ni(II), Mn(II), Co(II) and Zn(II) Complexes, Chemistry and Material Research, 6(3), 140-150.

26. L. N. Obasi and A. Ibezim; (2015): Physico-Chemical and Toxicological Studies on Xylopia

aethropica leaves, Int. J. Chem. Sci., 13(1), 178-186.

27. L. N. Obasi, G. U. Kaior, L. Rhyman, A. A. Ibrahim, F. Hoong-Kun and P. Ramasami;

(2016): Synthesis, Characterization, Antimicrobial Screening and Computational Studies of 4-[3-

(4-Methoxy-phenyl)-allylideneamino]-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one, J. Mol.

Struc., 1120, 180-186. DOI:10.1016/j.molstruc.2016.05.037

28. L. N. Obasi, U. S. Oruma, A. A. Ibrahim, P. Ramasami, C. J. Ezeorah and A. E. Ochonogor;

(2017): Synthesis, Characterization and Antibacterial Studies of N-(Benzothiazol-2-yl)-4-

chlorobenzenesulphonamide and Its Neodymium(III) and Thallium(III) Complexes, Molecules,

22(2), 153; doi:10.3390/molecules22020153

29. L. N. Obasi, G. U. Kaior, A. Ibezim, A.E. Ochonogor, L. Rhyman, V. Uahengo, M. Lutter,

K. Jurkschat and P. Ramasami; (2017): Synthesis, Characterization, Antimicrobial Screening and

in silico Studies of Schiff Bases Derived from Trans-para-methoxycinnamaldehyde, J. Mol.

Struc., 1149, 8-16. http://dx.doi.org/10.1016/j.molstruc.2017.07.097

 

30. S. Senthilkumar, R. Goswami, L. N. Obasi, and S. Neogi; (2017): Construction of Pillar-

Layer MOFs for CO 2 Adsorption under Humid Climate, High Selectivity and Sensitive Detection

 

of Picric Acid in Water, ACS Sustainable Chem. Eng., 5(12), 11307–11315. DOI:

10.1021/acssuschemeng.7b02087

31. L. N. Obasi, Ezugwu, D. N. and Ramasami, P.; (2017): Syntheses, Characterization and

Antibacterial Screening of Nd(III) and Gd(III) Complexes of N-(benzothiazol-2-

yl)benzenesulphonamide, Communications in Physical Sciences, 2 (1), 14-25.

32. J. C. Ezeorah, V. Ossai, L. N. Obasi, M. I. Elzagheid, L. Rhyman, M. Lutter, K. Jurkschat,

N. Dege and P. Ramasami; (2018): Synthesis, Characterization and Computational Studies of 3-

{(E)-[(2-hydroxyphenyl)imino]methyl}benzene-1,2-diol and Molecular Structure of its

Zwitterionic Form, J. Mol. Struc., 1152, 21-28. DOI/10.1016/j.molstruc.2017.09.083

33. U. S. Oruma, P. O. Ukoha, L. Rhyman, M. I. Elzagheid, L. N. Obasi, P. Ramasami and K.

Jurkschat; (2018): Synthesis, Characterization, Anti-microbial Screening and Computational

Studies of a Tripodal Schiff Base containing Pyrimidine Unit, J. Heterocyclic Chemistry, 55(5),

1119-1129. DOI:10.1002/jhet.3142.

34. Chinyere E. E, Ukoha P. O., Agbo J. N and Obasi L. N. (2018): Electrical Conductivity,

Electronic Absorption, IR and NMR Studies On Cr(III), Sn(IV) and Pb(IV) Complexes of an

Azo Ligand derived from Isatin and 4-Aminoantipyrine, Nigerian Journal of Chemical Research,

23(2), 71-82.

35. L. N. Obasi, J. C. Ezeorah, V. Ossai, J. Ayogu, U. S. Oruma, A. Ibezim, L. Rhyman, M.

Lutter, K. Jurkschat, N. Dege and P. Ramasami; (2019): Structural, computational and in silico

studies of Schiff bases derived from 2,3-dihydroxybenzaldehyde and molecular structure of their

zwitterionic forms, J. Mol. Struc., 1188, 69-75. DOI/10.1016/j.molstruc.2019.03.081

36. C. G. Okenwa-Ani, L. N. Obasi, A. E. Ochonogor and J. N. Ihedioha; (2019): Heavy Metals

Levels in Plastics Housing of Televisions: Is there a changing trend across three decades (1980-

2000)?, Iranian Journal of Toxicology, 13(3), 27-32.

37. Dege, N., Ersanli, C. C. and Obasi. L. N. (2019): Density Functional Theory Computations

of (E)-4-((furan-2-ylmethylene)amino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one.

Proceedings of the 8th International Vocational Schools Symposium, UMYOS’19 SİNOP,

Turkey, 11-13 June, 2019. Pp. 18-24.

38. V. Ossai, P. O. Ayogu, C. B. Laraps, O. U. Okenyeka, J. C. Ezeorah, N. Dege, A. Ibezim, M.

Lutter, K. Jurkschat and N. L. Obasi; (2020): Crystal Structural and In silico Studies of Schiff

bases derived from 4-aminoantipyrine, Solid State Sciences, 106, 106293,

https://doi.org/10.1016/j.solidstatesciences.2020.106293

39. Nnamdi C. Okey, Nnamdi L. Obasi, Paul M. Ejikeme, Derek T. Ndinteh, Ponnadurai

Ramasami, El-Sayed M. Sherif, Ekemini D. Akpan and Eno E. Ebenso; (2020): Evaluation of

some amino benzoic acid and 4-aminoantipyrine derived Schiff bases as corrosion inhibitors for

mild steel in acidic medium: Synthesis, experimental and computational studies, J. Mol. Liquids,

315, 113773, DOI:10.1016/j.molliq.2020.113773

 

40. U. S. Oruma, P. O. Ukoha and N. L. Obasi; (2020): Synthesis, Characterization and

Biological Studies of Trinuclear Ce(IV) Salen Capped Complex with 5-amino-2,4,6-tris(4-

carboxybenzimino)-1,3-pyrimidine, Communications in Physical Sciences, 5(3), 403-417.

41. G. U. Kaior N. J. Nwodo, U. S. Oruma, A. Ibezim, A. E. Ochonogor, K. K. Onyia and N.

L. Obasi; (2020): Structural, Antimicrobial and in Silico Studies of Some Schiff Bases of Trans-

paramethoxycinnamaldehyde Derivatives, Communications in Physical Sciences, 5(4), 544-566.




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