title: Luminescent charge-transfer complexes: tuning emission in binary fluorophore mixtures.
abstract: Charge-transfer (CT) complexes composed of a π-electron-poor naphthalene diimide (NDI) derivative combined with a series of π-electron-rich donors were investigated. Solutions of the CT complexes are nonemissive; however, solid-state complexes and aqueous suspensions display emission that is dependent on the energy of the HOMO of the electron donor. Crystallographic analysis of a pyrene-NDI complex reveals columnar packing and a high degree of frontier molecular orbital (FMO) overlap that likely contributes to the observed optical properties. The fluorescent CT particles are utilized as imaging agents; additional luminescent CT complexes may be realized by considering FMO energies and topologies.
authors.affiliation: Center for Supramolecular Science and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33124, United States.
authors.forename: Maneesh D
authors.initials: MD
authors.lastname: Gujrati
authors.forename: N S Saleesh
authors.initials: NS
authors.lastname: Kumar
authors.forename: Adrienne S
authors.initials: AS
authors.lastname: Brown
authors.forename: Burjor
authors.initials: B
authors.lastname: Captain
authors.forename: James N
authors.initials: JN
authors.lastname: Wilson
mesh_terms: D004579:Electron Transport; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D009281:Naphthalenes / Q000737:chemistry; D011721:Pyrenes / Q000737:chemistry
chemical_list: D005456:Fluorescent Dyes; D009281:Naphthalenes; D011721:Pyrenes; C031721:naphthalene; C030984:pyrene