Controlling the Structure of Single Walled Carbon Nanotube Fragments by Organic Synthesis

• Unité de recherche: COST
• Numéro de projet: C10.0090
• Titre du projet anglais: Controlling the Structure of Single Walled Carbon Nanotube Fragments by Organic Synthesis

Mots-clé (Anglais)

Carbon Nanotubes Organic Synthesis [2+2+2] Cycloadditon

Programme de recherche (Anglais)

COST-Action MP0901 - Designing novel materials for nanodevices: From Theory to Practise (NanoTP)

Description succincte (Anglais)

The preparation of carbon nanotubes (CNTs) with controlled structure (diamter, chirality, length and defects) is still one of the holy grails in CNT research. In this project we present an approach using organic synthetic methods to access CNT fragments controlling all structural parameters. With this uniform materials in hand fundamental questions in CNT science will be answered in collaboration with other members of the COST action (When is a Nanotube a Nanotube? Does size matter? The defect effect? What is the role of the CNT-metal connection in devices?).

Partenaires et organisations internationales (Anglais)

BE, CH, DE, DK, ES, FI, FR, GR, HU, IE, IT, PL, PT, RO, SE, SI, TR, UK

Résumé des résultats (Abstract) (Anglais)

The controlled synthesis of single walled carbon nanotubes is still one of the holy grails in this research area. Access to defines carbon nanotubes would offer the possibility to unleach the tremendous potential of this class of compounds. Depending on their structure, they can act as excellent conductors or semi-conductors. Additionally, the possibility to creat defined tubular objects on a nanometer scale would offer novel applications in material sciences. Within the duration of the COST-action we were able to develop a new synthetic route to substituted [8]cycloparaphenylenes. The key step is a [2+2+2] cycloaddition, which introduces the functionalities at a quite late stage of the synthesis. All the critical intermediates have been analyzed by X-ray analysis nicely demanostrating the increase of strain with every step. In collaboration with C. Ewels, Nantes, within the COST-Action NanoTP the synthsized nanorings were also computationally investigated.

Références bases de données (Anglais)

Swiss Database: COST-DB of the State Secretariat for Education and Research Hallwylstrasse 4 CH-3003 Berne, Switzerland Tel. [phone] Swiss Project-Number: C10.0090