1. Experimental work was conducted at Washington University in Saint Louis Department of Chemistry Saint Louis MO 63130 USA
2. Present address: Microsoft Corporation One Microsoft Way Redmond WA 98052 USA
3. Department of Chemistry Texas A&M University College Station Texas 77842
4. Department of Chemical Engineering Texas A&M University College Station Texas 77842
5. Department of Materials Science & Engineering Texas A&M University College Station Texas 77842