152-2006-CONCYTEC-OAJ

The present work was financed by the project 152-2006-CONCYTEC-OAJ granted by the National Council of Science and Technology to B.L. A.N. thank the H. McCracken doctoral scholarship at the New York University. The authors would also like to thank the Department of Chemistry of the Faculty of Sciences and Philosophy of the Cayetano Heredia University, the Section of Chemistry of the Department of Sciences of the Pontifical Catholic University of Peru and Norma Cuizano, Todd Kelly, Richard Buran and Paul Henkel for their contributions and critical comments concerning this research.

The authors thank the National Council of Science and Technology of Peru for the grant 152-2006-CONCYTEC-OAJ used in carrying out this work. We also wish to extend our grateful appreciation to Rosario Portales, Todd Kelly and Richard Buran for their contributions and critical comments regarding this research.