1. Department of Chemistry and Physics, Southwestern Oklahoma State University 100 Campus Drive, Weatherford, OK, USA http://faculty.swosu.edu/tim.hubin/
2. Department of Chemistry, University of Hull Cottingham Road, Kingston Upon Hull, HU6 7RX, UK http://www2.hull.ac.uk/science/chemistry/staff/academic_staff/dr_steve_archibald.aspx
3. Selcuk University, Faculty of Science, Department of Chemistry 42075 Konya, Turkey