1. Department of Chemistry, University of Ibadan, Ibadan, Nigeria
2. Department of Chemistry, Lagos State University, Ojo, Lagos,
Nigeria
3. International School for Advanced Studies (SISSA), via Bonomea 265, 34136
Trieste, Italy
4. CNR-IOM Democritos,
34014 Trieste,
Italy
5. Chemical
and Material
Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States