title: Spectroscopic probing of organic molecules encapsulated in functionalized carbon nanotubes in solution.
abstract: Pyrene was introduced into cavities in functionalized single-walled and multiple-walled carbon nanotubes to be used as a molecular probe in the study of encapsulation. The solubility of these materials in common organic solvents allowed solution-phase absorption and emission spectroscopic measurements. The results, which are consistent with the formation of pyrene excimer, are explained in terms of high local pyrene concentrations and perhaps pyrene microcrystals inside the carbon nanotube cavities. The fluorescence decay results show that there is significant quenching of pyrene excited states by the hosting carbon nanotubes.
authors.affiliation: Department of Chemistry, Center for Advanced Engineering Fibers and Films, Howard L. Hunter Chemistry Laboratory, Clemson University, Clemson, South Carolina, USA.
authors.forename: Kefu
authors.initials: K
authors.lastname: Fu
authors.forename: Robert B
authors.initials: RB
authors.lastname: Martin
authors.forename: Apparao M
authors.initials: AM
authors.lastname: Rao
authors.forename: Ya-Ping
authors.initials: YP
authors.lastname: Sun
mesh_terms: D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis / Q000737:chemistry; D003460:Crystallization / Q000379:methods*; D004339:Drug Compounding / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008422:Materials Testing / Q000379:methods; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000302:isolation & purification; D011721:Pyrenes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D020099:Coated Materials, Biocompatible; D037742:Nanotubes, Carbon; D011721:Pyrenes; C030984:pyrene