Benzoyl thiourea derivatives 1 Carbonyl groups Chelation 1 Chemical detection 1 Condensation 1 Copper 1 Diethylenetriamine 1 Emission spectroscopy 1 Fluorescence 1 Fluorescent emission spectroscopy 1 Fluorescent sensors 1 Iron compounds 1 Ligands 1 Manganese 1 Metal complexes 1 Metal ions 1 Metals 1 Nuclear magnetic resonance 1 Nuclear magnetic resonance spectroscopy 1 Proton nuclear magnetic resonance 1 Selectivity and sensitivity 1 Solutions 1 Spectrum analysis 1 Synthesis and characterizations 1 Thioureas 1 Transition metal compounds 1 Transition metals 1