title: A new designed π conjugated molecule for stable single walled carbon nanotube dispersion in aqueous medium.
abstract: A molecule with a π conjugated backbone built from aromatic thiophene and dialkoxyphenylene units and substituted imidazolium groups (TPO) is designed to obtain ultra-stable single walled carbon nanotube (SWCNT) dispersion in aqueous medium. The proposed mechanism of non-covalent interaction is accompanied by individualization of SWCNT and comprises of dominant nondisruptive π-π and cation-π interaction between them and the TPO conjugated oligomer. The individualization of SWCNT and dispersibility and stability of the ultra-stable suspensions were estimated using high resolution transmission electron microscopy, UV-Visible-NIR absorption spectroscopy, Raman spectroscopy, photoluminescence and zeta potential measurement. Nuclear magnetic resonance data provides direct evidence toward possible cation-π interaction.
authors.affiliation: Instituto de Física, Universidade Federal de Uberlândia, 38408-100 Uberlândia, MG, Brazil.
authors.forename: S L
authors.initials: SL
authors.lastname: Nogueira
authors.affiliation: Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil.
authors.forename: S K
authors.initials: SK
authors.lastname: Sahoo
authors.affiliation: Institut Charles Gerhardt, Equipe AM2NArchitectures Moléculaires et Matériaux Nanostruturés ENSCM, Montpellier, France.
authors.forename: T
authors.initials: T
authors.lastname: Jarrosson
authors.affiliation: Institut Charles Gerhardt, Equipe AM2NArchitectures Moléculaires et Matériaux Nanostruturés ENSCM, Montpellier, France.
authors.forename: F
authors.initials: F
authors.lastname: Serein-Spirau
authors.affiliation: Institut Charles Gerhardt, Equipe AM2NArchitectures Moléculaires et Matériaux Nanostruturés ENSCM, Montpellier, France.
authors.forename: J-P
authors.initials: JP
authors.lastname: Lère-Porte
authors.affiliation: Departamento de Física, Universidade Federal de Rondônia, Porto Velho 76900-900, Brazil.
authors.forename: E A
authors.initials: EA
authors.lastname: Moujaes
authors.affiliation: Instituto de Física, Universidade Federal de Uberlândia, 38408-100 Uberlândia, MG, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Marletta
authors.affiliation: Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Belo Horizonte 31270-901, MG, Brazil.
authors.forename: A P
authors.initials: AP
authors.lastname: Santos
authors.affiliation: Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil.
authors.forename: C
authors.initials: C
authors.lastname: Fantini
authors.affiliation: Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Belo Horizonte 31270-901, MG, Brazil. Electronic address: clas@cdtn.br.
authors.forename: C A
authors.initials: CA
authors.lastname: Furtado
authors.affiliation: Instituto de Física, Universidade Federal de Uberlândia, 38408-100 Uberlândia, MG, Brazil. Electronic address: raigna@fafis.ufu.br.
authors.forename: R A
authors.initials: RA
authors.lastname: Silva
keywords: Charge transfer; Conjugated oligomer; Non-covalent interactions; Single walled carbon nanotube; Stable dispersion; π–π interaction