1. Department of Chemistry Texas A&M University at Qatar PO Box 23874 Doha Qatar
2. Laboratoire des IMRCP Universite Paul Sabatier CNRS UMR 5623 118 route de Narbonne Toulouse 31062 Cedex 9 France
3. Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77845‐3255 USA
4. Department of Materials Science and Engineering Texas A&M University 209 Reed McDonald Building College Station TX 77843‐3003 USA