Novel fluorescent chemosensor for anions via modulation of oxidative PET: a remarkable 25-fold enhancement of emission

Coskun, A
Baytekin, BT
Akkaya, EU
The fluorescence emission intensity of the 1:1 Zn(II) complex of a doubly boradiazaindacene (BODIPY) substituted bipyridyl ligand is highly sensitive to anion coordination to the metal center. Oxidative PET, which is responsible for the quenching of the fluorescence in the complex is effectively inhibited by anion coordination, leading to a 25-fold enhancement of the emission intensity. (C) 2003 Published by Elsevier Ltd.


A squaraine-based sodium selective fluorescent chemosensor
Oguz, U; Akkaya, EU (1998-08-06)
A novel squaraine with a lariat-crown ether cation-receptor unit was synthesized and shown to selectively respond to Na+ ions in polar protic solvents. The selectivity of the novel ligand, together with the impressive spectroscopic properties of squaraines yields a promising chemosensor,
A new and efficient chemoenzymatic route to both enantiomers of alpha '-acetoxy-alpha-methyl and gamma-hydroxy-alpha-methyl cyclic enones
Demir, Ayhan Sıtkı; Findik, H; Kose, E (Elsevier BV, 2004-03-08)
A chemoenzymatic synthesis of both enantiomers of the pharmacologically interesting alpha'-acetoxy-alpha-methyl and gamma-hydroxy-alpha-methyl cyclic enones starting from alpha-methyl-beta-methoxy cyclic enones is reported. Manganese(Ill) acetate-mediated acetoxylation followed by the enzyme-mediated hydrolysis of alpha'-acetoxy enone provides acetoxy enones 1a and 2a and hydroxy enones 1b and 2b with high enantiomeric excesses in good yields. The reduction of the acetoxy and hydroxy enones furnished both e...
Fungal deracemization of benzoin
Demir, AS; Hamamcı, Haluk; Sesenoglu, O; Neslihanoglu, R; Asikoglu, B; Capanoglu, D (2002-09-02)
An enzyme system of Rhizopus oryzae (ATCC 9363) catalyzes the inversion of the chirality of benzoin via a deracemization reaction and, depending on the pH of the medium, both enantiomers of benzoin are obtained in good yield and high ee starting from rac-benzoin.
Optical fluoride sensing with a bay region functionalized perylenediimide dye
Yukruk, Funda (2006-01-01)
A perylenedimiide (PDI) derivative functionalized at the perylene core (bay region) to carry phenyl boronic acid groups was shown to interact with fluoride with changes in the emission and absorption spectrum. These changes are most likely due to fluoride-induced aggregation and/or quenching of the perylenediimide dye. The dye is also selective; among halide ions, fluoride anions generate a significant response. Thus, this class of PDI derivatives is likely to be useful in practical fluoride sensing.
Improvement in magnetic properties of La substituted BaFe12O19 particles prepared with an unusually low Fe/Ba molar ratio
Sozeri, H.; KÜÇÜK, İLKER; Ozkan, H. (2011-07-01)
In this study, effect of lanthanum substitution on the phase composition, lattice parameters and magnetic properties of barium hexaferrite has been studied in samples synthesized in ammonium nitrate melt. Samples, prepared with different lanthanum amount and having various initial Fe/(Ba + La) ratios in between 12 and 2 {(Ba1-xLax).n Fe2O3, where 0 <= x <= 1 and 1 <= n <= 6)}, are sintered at temperatures from 800 to 1200 degrees C. The lattice parameters, both a and c, decreases with increasing La amount w...
Citation Formats
A. Coskun, B. Baytekin, and E. Akkaya, “Novel fluorescent chemosensor for anions via modulation of oxidative PET: a remarkable 25-fold enhancement of emission,” TETRAHEDRON LETTERS, pp. 5649–5651, 2003, Accessed: 00, 2020. [Online]. Available: