title: The synthesis and spectral properties of a stimuli-responsive D-π-A charge transfer dye based on indole donor and dicyanomethylene acceptor moiety.
abstract: A dual mode chemosensor dye 3 for detection of fluoride ion, based on the D-π-A molecular framework by one-step condensation, presents high selectivity and sensitivity both in colorimetric and fluorometric analyses. Upon the addition of F(-) anion, the absorption band shows a remarkable red shift along with fluorescent intensity decreasing. The absorption and fluorescent intensities of the dye 3 can be reversibly selected by deprotonation/protonation of the amine moiety via control of intramolecular charge transfer (ICT), leading to a molecular switch with "on" and "off" states. (1)H NMR titration analysis and DMol(3) calculation were employed to reveal the intermolecular charge transfer system of dye 3-F(-) complex.
authors: Department of Advanced Organic Materials Science and Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea.
authors: Yu
authors: Y
authors: Wang
authors: Seon-Yeong
authors: SY
authors: Gwon
authors: Sheng
authors: S
authors: Wang
authors: Sung-Hoon
authors: SH
authors: Kim
mesh_terms: D000042:Absorption; D000838:Anions; D004396:Coloring Agents / Q000138:chemical synthesis* / Q000737:chemistry*; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004583:Electrons; D007211:Indoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D009570:Nitriles / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D000838:Anions; D004396:Coloring Agents; D007211:Indoles; D009570:Nitriles; C030374:indole; D004121:Dimethyl Sulfoxide