RT Journal Article
T1 The mechanical bond on carbon nanotubes: diameter-selective functionalization and effects on physical properties
A1 Martínez Periñan, Emiliano
A1 Juan, Alberto de
A1 Pouillon, Yann
A1 Schierl, Christoph
A1 Strauss, Volker
A1 Martín, Nazario
A1 Rubio, Angel
A1 Guldi, Dirk M.
A1 Lorenzo, Encarnación
A1 Pérez, Emilio M.
AB We describe the functionalization of SWNTs enriched in (6,5) chirality with electron donating macrocycles to yield rotaxane-type mechanically interlocked carbon nanotubes (MINTs).Investigations by means of TEM and control experiments corroborated the interlocked nature of the MINTs. A comprehensive characterization of the MINTs through UV-vis-NIR, Raman, fluorescence, transient absorption spectroscopy, cyclic voltammetry, and chronoamperometry was carried out.Analyses of the spectroscopic data reveal that the MINT-forming reaction proceeds with diameter selectivity, favoring functionalization of (6,5) SWNTs rather than larger (7,6) SWNTs. In the ground state, we found a lack of significant charge-transfer interactions between the electron donor exTTF and the SWNTs. Upon photoexcitation, efficient charge-transfer between the electron donating exTTF macrocycles and SWNTs was demonstrated. As a complement, we established significantly different charge-transfer rate constants and diffusion coefficients for MINTs and the supramolecular models,which confirms the fundamentally different type of interactions between exTTF and SWNTs in the presence or absence of the mechanical bond. Molecular mechanics and DFT calculations support the experimental findings.
PB RSC
SN 2040-3364
YR 2016
FD 2016-04
LK https://hdl.handle.net/20.500.14352/23179
UL https://hdl.handle.net/20.500.14352/23179
LA eng
NO Unión Europea. FP7
NO Unión Europea. H2020
NO Air Force Office of Scientific Research
NO Air Force Office of Scientific Research
NO European Research Council (ERC)
DS Docta Complutense
RD 7 abr 2025