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Prof. Ayi Anyama Ayi

Pure and Applied Chemistry

Ayi Anyama Ayi received his B.Sc. and Ph.D. degrees in 1995 and 2002, respectively from the University of Calabar. He was a TWAS South-South Visiting Scholar in 2000, and a TWAS Postdoctoral Fellow (2003-2004) at Jawarhalal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalor, India, under Prof. C. N. R. Rao. As a man of considerable drive and resourcefulness, Ayi has demonstrated immense capacity for independent academic work, which has won him more professional accomplishments as recipient of (i) DAAD Research Fellowship (May- July, 2009), with Prof. Andreas Taubert at Potsdam University/Max Planck Institute of Colloid and Surface Chemistry, Golm, Germany, (ii) Commonwealth Academic Fellowship (2009 - 2010) with Prof. Andrew Burrows at University of Bath, Claverton Down, BA 2 7AY, UK, and (iii) Fulbright African Research Fellowship (2010 -2011), with Prof. Abraham Clearfield at Texas A & M University, College Station, Texas, USA. Ayi A. Ayi has designed and isolated various novel open-framework materials such as metal-organophosphonate frameworks, open-framework metal phosphates, selenates and sulfates and acetate-phosphate dimmers for possible applications in separation chemistry, catalysis and adsorption studies. He unraveled the formation mechanism of various open-framework metal phosphates, by isolating a zero-dimensional monomer and successfully transforming it to a one-, two- and three-dimensional network structure. He is an author of a chemistry text titled Understanding Inorganic Chemistry through Problems and Solutions. He was the acting Head of the Department of Pure and Applied Chemistry, University of Calabar, Nigeria (March 2013- February, 2015) and during his sabbatical leave with Federal University Lafia, he was appointed Acting Head of the Department of Chemistry (September 17, 2015 – August 31, 2016). Currently, Professor Ayi is the Director of Inorganic Materials Research Laboratory. His interest is in the development of syntheses, structures and properties of Metal-Organic Framework Materials (MOFs). He is also working on nanomaterials syntheses using ionic liquids/ plant extracts and evaluation of their antimicrobial activities. He is a recipient of TWAS Research Grant (2013 -2015), and RSC Personal Research Grant (2014 -2015). He is a member of many professional bodies and Editorial boards. He has published over 40 articles in refereed journals.

Ayi A. Ayi ,Chinyere A. Anyama and Samuel S. Etuk; Synthesis and Characterization of ZrO2   nanoparticles in ionic liquid  1-ethyl-3-methylimidazodium trifluoromethanesulfonate [EmimTfO],  Journal of Applied Chemistry, 2014, 2 (1):26-32 (

Ayi A. Ayi, Tiffany L. Kinnibrugh and Abraham Clearfield (2014); Hydrothermal Synthesis and Structural Characterization of Ammonium ion-Templated Lanthanide(III) Carboxylate-Phosphonates. Frontiers in Chemistry 2, 94

S. S. Etuk, J. G.  Atai,  Ayi.  A. Ayi (2014), Hydrothermal Synthesis  and Characterisation of Bis(4-Hydroxybenzaldehyde)-P-Phenylenediamine Zinc(II) Phosphate, Global Journal of Pure and Applied Sciences 20, 17-24.

J. G.  Atai, S. S.  Etuk, Ayi. A.  Ayi (2014), Hydrothermal Synthesis and Characterisation of Amine-Templated Metal Phosphate Framework, Global Journal of Pure and Applied Sciences 20, 31-37 

Iniama, G.E., Ayi, A. A.; Okafor, P.C., Edem, C.A., Duke, E.E.O. (2014), Copper (II) mixed-ligand complexes of 2-acetylpyridine-N (4)-substituted thiosemicarbazones and nitrogen-sulphur monodentate ligands: Synthesis, characterization and antimicrobial activity.  International Journal of Applied Chemistry (IJAC) 10, 67-76.

Ayi A. Ayi, Aniefiok J. Umoh, Chinyere A. Anyama, Samuel S. Etuk and Joseph O. Ogar (2015), Synthesis, Spectral Characterization and Anti-Microbal Activity of Silver Nanoparticles in 1-Alkyl–3-Methylimidazolium Methanesulfonate Ionic Liquids. (IJIRSE) International Journal of Innovative Research in Science & Engineering Vol 3. Iss. 5/ Page 222

Ayi A. Ayi, Chinyere A.Anyama, Varsha Khare (2015), On the chemical synthesis of molybdenum nanoparticles under reducing conditions in ionic liquids. Journal of Materials, Vol. 2015, pp. 1-7.

 Chinyere A. Anyama, Grace E. Iniama, Joseph O. Ogar and Ayi A. Ayi (2015),  Hydrothermal synthesis and structural characterization of an organically-templated open-framework trimolybdates. International Journal of Physical Sciences, Vol. 10 (19), pp 543-548 

Ephraim E. Khansi, Chinyere A. Anyama,  Ayi A. Ayi, Jude C. Onwuka (2016),  Synthesis and characterization of layered double hydroxide nanostructures and their application in the removal of Fe2+ and Ca2+ ions from oil wells.  Acta Scientiae et Intellectus, 2(5), 34-45

Bassey Inah, Ayi A. Ayi  and Amit Adhikary(2017), Crystal structure of a chloride-bridged copper(II) dimer: piperazine-1,4-dium bis(di-μ-chlorido-bis[(4-carboxypyridine2-carboxylato-κ2 N , O 2)chloridocuprate(II)]

    Acta Cryst. E73, 246–249

Ayi A. Ayi, A. Choudhury, S. Natarajan, S. Neeraj  and C.N.R.Rao (2001); Transformation of low-dimensional zinc phosphates to complex open-framework structure. Part I: Zero-dimensional to one-, two-, and three-dimensional structures. Journal of Materials Chemistry, 11, 1181-1191.

Ayi A. Ayi, Amitava Choudhury, Srinivasan Natarajan and C.N.R.Rao (2001); Cyclic acetate dimmers formed by C-H…O hydrogen bonds in an open-framework zinc phosphate-acetate. New Journal of Chemistry, 25, 213-215.

Ayi A. Ayi, Amitava Choudhury, Srinivasan Natarajan and C.N.R.Rao (2001); One-dimensional zinc phosphates with linear chain structure. Journal of Physics and Chemistry of Solids, 62, 1481-1491.

C.N.R.Rao, S. Natarajan A. Choudhury, S.Neeraj and A. A. Ayi (2001); Aufbau principle of complex open-framework structures of metal phosphates with different dimensionalities. Accounts of Chemical Research, 34, 80-87.

Ayi A. Ayi, Offiong E. Offiong and Narajan T. Akinchan(2002); Recent trends in open-framework solids. Journal of Chemical Society of Nigeria, 27, 52-60.

J. N. Behera, Ayi A. Ayi and C.N.R.Rao(2004); The first organically templated open-framework metal selenate with a three-dimensional architecture. Chemical Communication  968-969.

Ayi A. Ayi, Choudhury A.; and Rao, C.N.R(2005); A versatile route to hybrid open-framework materials. Global J. Pure and Applied Sciences, 11, 532-534.

Ayi A. Ayi and Offiong E. Offiong(2005); Synthesis and Structural characterization  of a three-dimensional zinc phosphate templated by tris(2-aminoethyl)amine. Journal Chemical Soc. Of Nigeria, 30, 45-49 

Ayi A. Ayi, Offiong E. Offiong and A. I. Onuchukwu(2005); Hydrothermal synthesis, structural characterization and chemical reactivity of zero-dimensional monomeric metal phosphate. Journal of Chemical Society of Nigeira, 30, 40-44.

Ayi A. Ayi, Offiong E. Offiong Umet E.Ebri and Grace E. Iniama(2005); Hydrothermal synthesis and structural characterization of dimethylamine-templated aluminophosphate. Journal of Chemical Society of Nigeria, 30, 36-39.

Ayi A. Ayi(2006); A hybrid open-framework structure: Hydrothermal  synthesis and characterization of zinc(II) ethylacetoacetate phosphate. Int. J. of Pure and Applied Sciences, 1, 69-71.1

Ayi A. Ayi(2007); X-ray studies, vibrational spectra and thermal behaviour of linear chain aluminophosphate [C6H21N4][Al2(PO4)].5H2O and its transformation product [C6H21N4][Al3(PO4)]4. Journal of Research in Physical Science. 3, 86-95.

A. A. Ayi and O. E. Offiong (2008); X-ray studies, Spectral Characterization and Thermal behaviour of a two dimensional Zinc phosphate templated by tris(2-aminoethyl)amine [C6H21N4][Zn6(PO4)3(HPO4)3].H2O. Global Journal of Pure and Applied Sciences, 14, 389-396. 

Ayi A. Ayi, I. E.Uwa and G. E. Iniama(2007); Synthesis, spectral characterization and thermal properties of triethylenetetraammonium selenate monohydrate; a possible intermediate in the synthesis of open-framework metal selenates. Journal of Ultra Scientists for physical sciences. 19, 473-482

G. E. Iniama, O. E. Offiong, E. Nfor and A. A. Ayi(2008); Mixed-ligand complexes of nickel(II) with 2-acetylpyridine thiosemicarbazone and some N/S monodentate ligands: Synthesis, Structural Characterization and Biological Activity. Global Journal of Pure and Applied Sciences, 4, 411-415.

Ayi A. Ayi (2008); Organically templated open-framework chlorophosphates obtained by amine-phosphate route. International journal of chemical sciences 1, 230-236.

Ayi A. Ayi, I. E. Uwah and Offiong E. Offiong (2009); Linear Chain Lanthanum sulphate obtained by the reaction of La3+ ions with diethylenetriamine sulphate. Journal of Ultra Chemistry, 5, 13-20. 

Iniama, G. E. ; Offiong E. Offiong and Ayi A. Ayi (2009); Synthesis, characterization and antimicrobial activity of copper (II) and Zinc (II) mixed ligand complexes of 2-acetylpyridine thiosemicabarzones and nitrogen, sulphur monodentate ligands. International Journal of Chemistry, 1 41-46.

Ayi A. Ayi and Bassey Inah (2010); Synthesis and Characterization of Neodymium selenate-selenite  Journal of Ultra Chemistry, 6.  161-170

Varsha Khare, Zhonghao Li, Alexandre Mantion, Ayi A. Ayi, Sanjiv Sonkaria, Antje Voelkl, Andreas F. Th€unemann  and Andreas Taubert (2010); Strong anion effects on gold nanoparticle formation in ionic liquids. Journal of Materials Chemistry , 20, 1332-1339.

Ayi  A. Ayi, Varsha Khare, Peter Strauch, Jerome Girard, Katharina M. Fromm and Andreas Taubert (2010); On the chemical synthesis of titanium nanoparticles from ionic liquids. Monatshefte fur  Chemie- Chemical Monthly,  141:1273–1278

Ayi A. Ayi, Tiffany L. Kinnibrugh and Abraham Clearfield (2011), Linear chain aluminum(III) carboxymethylphosphonate with encapsulated ammonium ions. Dalton Trans.40(47), 12648-12650

Tiffany L. Kinnibrugh, Ayi A. Ayi, Vladimir Bahmotov, and Abraham Clearfield(2013),  Probing Structural Changes in a Phosphonate-based MOF Exhibiting Reversible Dehydration. Crystal Growth & Design 13(7), pp2973-2981.

Ayi A. Ayi,  Andrew D. Burrows, Mary F. Mahon, and  Viorica M. Pop (2011); Sodium Trihydrogen-1,4-Benzenediphosphonate: An Extended Coordination Network. J Chem Crystallogr. 41, 1165–1168.

Ayi A. Ayi, Andrew D. Burrows, Mary F. Mahon and Viorica M. Sebestyen (2013) , A molybdenum diphosphonate network structure exhibiting reversible dehydration and selective uptake of methanol. CrystEngComm, 15, 9301-9303 DOI: 10.1039/C3CE40484F. 

Ayi A. Ayi, Andrew D. Burrows,  Mary F. Mahon  and Anna J. Warren (2013)

                        trans-[PtCl2(NH2C6H4CO2H)2]: a platinum complex forming a two-                        dimensional  hydrogen-bonded network.  International Journal 

                       of Physical Sciences, 8(30), 1546-1550

      Articles published in 2014

Ayi A. Ayi (2012); Understanding Inorganic Chemistry through problems and Solutions. 2nd  ed. Unical Printing Press, Calabar. ISBN ISBN:978-220-080-8

Offiong E. Offiong, Bassey O. Ekpo, Ayi A. Ayi and Emmanuel  N. Nfor (2001); Fundamental Inorganic Chemistry, 1st ed. Zubicksgetf Nig. Ltd. Lagos  .

Offiong E. Offiong, Bassey O. Ekpo, Ayi A. Ayi and Emmanuel  N. Nfor Grace E. Iniama (2004); A Simple Approach to General and Inorganic Chemistry, 1st ed. Odessys Printers; Calabar.

Stephen Adie Adalikwu  Offiong E. Offiong and Ayi A. Ayi (2017),  Solvent-MediatedSynthesisofM(II)-Coordination Polymer Part 1: Crystal Structure of Poly(1,2-di(4-pyridyl)ethylene-k2N,N')bis(1,4-benzenediacetato-k4O,O',O'',O''')zinc(II)], C22H18ZnN2O4. Molbank, 2017, M952; 1-6.  doi:10.3390/M952 

Providence B. Ashishie, Chinyere A. Anyama, Ayi A. Ayi, Charles O. Oseghale, Elijah T. Adesuji and Ayomide H. Labulo (2018). Green synthesis of silver monometallic and copper-silver bimetallic nanoparticles using Kigelia africana fruit extract and evaluation of their antimicrobial activities. International Journal of Physical  Sciences Vol. 13(3), pp. 24-32,  DOI: 10.5897/IJPS2017.4689

Emmanuel K. Ephraim, Chinyere A. Anyama, Ayi A. Ayi  and Jude C. Onwuka (2018). Use of Nanostructured Layered Double Hydroxides as Nanofilters in the Removal of Fe2+ and Ca2+ Ions from Oil Wells. Advances in Materials Science and Engineering Volume 2018, 1-7

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