Dual-signaling fluorescent chemosensor based on bisthiazole derivatives

A new multifunctional 1, 10-phenanthroline based fluorophore for anion and cation sensing

“…The quenching caused by the addition of Cu 2+ may be due to occurrence of an excitation energy or charge transfer from 1 to the open shell d-orbital of Cu 2+ exhibiting a very fast and efficient non-radiative decay of excited states of fluorophore 1 [52]. However, it is assumed that addition of Zn 2+ ions to solution of 1 cause quenching through oxidative PET, since Zn being d 10 system cannot get involved in charge transfer.…”

Fluorescence sensor for sequential detection of zinc and phosphate ions

“…e l s e v i e r . c o m / l o c a t e / s a a phenol moiety at the position 4 as a ratiometric fluorescence sensor of Zn or dual chemosensor of Zn and Cu [44][45][46][47][48][49][50]. We also reported a thiazole-based compound containing a phenol or naphthol at the position 2 and an ester moiety at the position 4 as a very good Al 3+ sensor [51,52].…”

A simple coumarin-based colorimetric and ratiometric chemosensor for acetate and a selective fluorescence turn-on probe for iodide

“…The probable reason is the selective recognition for acetate anion which is related to the basicity and the shape of the guest complementarily between the host and the anionic guests. In particular, multiple hydrogen-bonding interactions [55][56][57], are required to high-affinity anion binding sites. Because acetate anion was a plane-triangular and the angle of O-C-O was about 1201, the distance of two oxygen atoms might be fit to the two hydrogen atoms in recognition sites of the receptor with triangular configuration (Y-shaped) among the rival anions.…”