Highly selective fluorescence sensors for the fluoride anion based on carboxylate-bridged diiron complexes. Issue 16 (1st December 2015)

• Record Type: Journal Article
• Authors: Zhou, Yuhan; Dong, Xiaoliang; Zhang, Yixin; Tong, Peng; Qu, Jingping
• Is Part Of: Dalton transactions. Volume 45:Issue 16(2016)
• Page Start: 6839
• Page End: 6846
• Publication Date: 2015-12-01
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt03801d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The diiron–sulfur clusters bearing urea and anthracene units showed rapid and selective recognition for the fluoride ion. Abstract : A new ligand bearing anthracene and its Fe(iii ) and Ru(iii ) derivatives have been synthesized and characterized exactly. The studies show that these dinuclear metal complexes serve as candidates of fluorescence chemosensors for anions. The interactions between these complexes and anions have been investigated by means of UV-Vis absorption spectra, fluorescence spectra, titration studies and 1 H-NMR. The results illustrated that two diiron complexes, [Cp*Fe(μ-SR)2 (μ-η 2 -L)FeCp*][PF6 ] (5a, R = Me;5b, R = Et; L = 4-(3-(anthracen-9-ylmethyl)ureido)benzoate), showed rapid and selective recognition for the fluoride ion over other anions with strong enhancement of emission intensities. The sensing mechanisms indicate that the hydrogen bonding interaction has been observed between chemosensors and F − .