Four cyclometalated iridium(III) complex-based chemosensors for turn-on response to thiourea in fruit juice and their application in test strips

The chemical reaction of 4-bromobenzoylchloride and 2-aminothiazole in the presence of potassium thiocyanate yielded a white solid formulated as C15H10BrN3OS2, which consists of 4-bromobenzamido and 2-benzothiazolyl moieties connected by a thiourea group. The 4-bromobenzamido and 2-benzothiazolyl moieties are in a trans conformtion (sometimes also called s-trans due to the single bond) with respect to the N—C bond. The dihedral angle between the mean planes of the 4-bromophenyl and the 2-benzothiazolyl units is 10.45 (11)°. The thiourea moiety, —C—NH—C(=S) —NH— fragment forms a dihedral angle of 8.64 (12)° with the 4-bromophenyl ring and is almost coplanar with the 2-benzothiazolyl moiety, with a dihedral angle of 1.94 (11)°. The molecular structure is stabilized by intramolecular N—H...O hydrogen bonds, resulting in the formation of an S(6) ring. In the crystal, pairs of adjacent molecules interact via intermolecular hydrogen bonds of type C—H...N, C—H...S and N—H...S, resulting in molecular layers parallel to the ac plane.

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Novel Thiourea Ligands—Synthesis, Characterization and Preliminary Study on Their Coordination Abilities

Todorova,

Rusew,

Petkova

et al. 2024

Molecules

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Two series of polydentate N,O,S-ligands containing thiourea fragments attached to a p-cresol scaffold, unsymmetrical mono-acylated bis-amines and symmetrical bis-thioureas, are obtained by common experiments. It is observed that the reaction output is strongly dependent on both bis-amine and thiocarbamic chloride substituents. The products are characterized by 1D and 2D NMR spectra in solution and by single crystal XRD. A preliminary study on the coordination abilities of selected products is performed by ITC at around neutral media.

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Four cyclometalated iridium(III) complex-based chemosensors for turn-on response to thiourea in fruit juice and their application in test strips

Cited by 3 publications

References 37 publications

Phosphorescent iridium(III) complexes containing bis(diphenylphorothioyl)amide ligands for the detection of Hg2+ ions and cysteine

Phosphorescent iridium(III) complexes containing bis(diphenylphorothioyl)amide ligands for the detection of Hg2+ ions and cysteine

Crystal structure of 1-(1,3-benzothiazol-2-yl)-3-(4-bromobenzoyl)thiourea

Novel Thiourea Ligands—Synthesis, Characterization and Preliminary Study on Their Coordination Abilities

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