1. College of Chemistry Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
2. Department of Chemistry University of Akron, 190 East Buchtel Commons Akron OH 44325‐3601 USA
3. Agilent, Bruker BioSpin Coventry CV4 9GH UK
4. Ingénierie and Architectures Macromoléculaires Institut Charles Gerhardt, École Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'École Normale 34296 Montpellier France
5. Indiana University Department of Chemistry 800 E. Kirkwood Ave. Bloomington IN 47405‐7102 USA
6. Department of Chemistry and Biochemistry The Ohio State University 1760 University Drive Mansfield OH 44906 USA
7. E. I. Du Pont de Nemours and Co Experimental Station Wilmington DE 19880‐0402 USA