Imidazo-benzo-15-crown-5 ethers bearing arylthienyl and bithienyl moieties as novel fluorescent chemosensors for Pd2+ and Cu2+

TETRAHEDRON

卷:67

Article

Batista, Rosa M. F.²  Oliveira, Elisabete¹  Costa, Susana P. G.²  Lodeiro, Carlos^1,3  Raposo, M. Manuela M.² 

[1] FCT UNL, Dept Chem, REQUIMTE, P-2829516 Monte De Caparica, Portugal

[2] Univ Minho, Ctr Chem, P-4710057 Braga, Portugal

[3] Univ Vigo, Dept Phys Chem, Fac Sci, BIOSCOPE Grp, Orense 32004, Spain

关键词: Crown ethers;    Arylthiophene;    Bithiophene;    Imidazole;    Fluorescent chemosensors;    CHEQ effect;    Pd2+;    Cu2+;    F-;   

DOI  :  10.1016/j.tet.2011.06.106

来源: Elsevier

【 摘 要 】

Novel fluorescent ionophores bearing imidazo-arylthienyl or imidazo-bithienyl pi-conjugated bridges functionalized with one or two fused benzo-15-crown-5 ethers as receptor units are reported. The sensing ability of the compounds in the presence of metallic cations (Li+, Na+, K+, Ca2+, Zn2+, Cu2+, Ni2+, Pd2+, and Hg2+) and fluoride ion was studied in MeCN/DMSO solutions by absorption and emission spectroscopy. The experimental results indicate that all compounds could act as selective fluorimetric sensors for Cu2+ and Pd2+ and also for the fluoride ion, in the case of the bis-substituted crown ether derivatives. (C) 2011 Elsevier Ltd. All rights reserved.

【 授权许可】

Free