title: Interaction of single-walled carbon nanotubes with poly(propyl ether imine) dendrimers.
abstract: We study the complexation of nontoxic, native poly(propyl ether imine) dendrimers with single-walled carbon nanotubes (SWNTs). The interaction was monitored by measuring the quenching of inherent fluorescence of the dendrimer. The dendrimer-nanotube binding also resulted in the increased electrical resistance of the hole doped SWNT, due to charge-transfer interaction between dendrimer and nanotube. This charge-transfer interaction was further corroborated by observing a shift in frequency of the tangential Raman modes of SWNT. We also report the effect of acidic and neutral pH conditions on the binding affinities. Experimental studies were supplemented by all atom molecular dynamics simulations to provide a microscopic picture of the dendrimer-nanotube complex. The complexation was achieved through charge transfer and hydrophobic interactions, aided by multitude of oxygen, nitrogen, and n-propyl moieties of the dendrimer.
authors.affiliation: Department of Organic Chemistry, Indian Institute of Science, Bangalore, India.
authors.forename: G
authors.initials: G
authors.lastname: Jayamurugan
authors.forename: K S
authors.initials: KS
authors.lastname: Vasu
authors.forename: Y B R D
authors.initials: YB
authors.lastname: Rajesh
authors.forename: S
authors.initials: S
authors.lastname: Kumar
authors.forename: V
authors.initials: V
authors.lastname: Vasumathi
authors.forename: P K
authors.initials: PK
authors.lastname: Maiti
authors.forename: A K
authors.initials: AK
authors.lastname: Sood
authors.forename: N
authors.initials: N
authors.lastname: Jayaraman
mesh_terms: D050091:Dendrimers / Q000737:chemistry*; D004987:Ethers / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D056004:Molecular Dynamics Simulation; D015394:Molecular Structure; D037742:Nanotubes, Carbon / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D050091:Dendrimers; D004987:Ethers; D007097:Imines; D037742:Nanotubes, Carbon; D014867:Water; C045122:propyl ether