1. Hexahapto-Metal Complexes of Single-Walled Carbon Nanotubes
- Author
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Xiaojuan Tian, Elena Bekyarova, Feihu Wang, Sandip Niyogi, Santanu Sarkar, Robert C. Haddon, Mikhail E. Itkis, Irina Kalinina, and Neetu Jha
- Subjects
chemistry.chemical_classification ,Nanotube ,Materials science ,Polymers and Plastics ,Ligand ,Organic Chemistry ,chemistry.chemical_element ,Carbon nanotube ,Condensed Matter Physics ,law.invention ,Coordination complex ,Metal ,Chromium ,Transition metal ,chemistry ,law ,visual_art ,Polymer chemistry ,Materials Chemistry ,visual_art.visual_art_medium ,Physical chemistry ,Organic chemistry ,Physical and Theoretical Chemistry ,Thin film - Abstract
We report the preparation of organometallic side-wall complexes of single-walled carbon nanotubes (SWNTs) under conditions, which allow the study of both mono- and bis-hexahapto SWNT coordination compounds [(η6-SWNT)Cr(CO)3, (η6-SWNT)Cr(η6-C6H6), (η6-SWNT)2Cr]. The results are interpreted in terms of exohedral and endohedral binding of chromium to the SWNT sidewalls and ligand competition reactions suggest that endohedral binding provides a very stable and kinetically inert mode of organometallic bonding. We demonstrate that the electrical conductivity of SWNT thin films are significantly enhanced by side-wall bonding to Group 6 transition metals (M = Cr, Mo, and W), which serve to reduce the inter-carbon nanotube junction electrical resistance by the formation of SWNT interconnects [(η6-SWNT)2M].
- Published
- 2012