A new luminescent silver-based probe for on/off sulfide determination

Abstract

The sulfide anion is a corrosive, toxic and harmful compound found in a wide range of anoxic environments. Metal-based complexes have been used as luminescent probes for sulfide determination. However, their synthesis usually involves laborious procedures and the use of toxic reagents. In this paper, we describe the synthesis, characterization and application of a new, sensitive and selective silver complex probe for sulfide detection. The process of sulfide determination is based on rapid reaction in aqueous/methanolic media between the silver (I) complex and sulfide leading to an increase in fluorescence intensity. Analytical performance has been studied in the concentration range of 190 to 950 nmol L − 1 of sulfide with suitable linearity, and the limit of detection was calculated to be (3σ/S) to 20 nmol L −1. The probe's selectivity to S 2 − was evaluated over other competing anions showing excellent results and its reversibility was demonstrated upon addition of AgCF 3 SO 3 .

A rapid evaluation of acute hydrogen sulfide poisoning in blood based on DNA-Cu/Ag nanocluster fluorescence probe

“…3B to further explore the mechanism that DNA-Cu/AgNCs probes worked as the model fluorescent probe for Na 2 S. As can be seen in Fig. 3B , the absorption peak at about 450 nm decreased after the addition of 30 μL of 100 μM Na 2 S. These results indicated that the fluorescence quenching of DNA-Cu/AgNCs probes was induced by the reaction between S 2− and DNA-Cu/AgNCs, according to the reports that S 2− has a strong binding affinity to copper and silver 32 , 33 . Moreover, TEM and FT-IR of DNA-Cu/AgNCs probes have been investigated and showed in the Fig.…”

Synthesis and crystal structure of an Ag(I) p-toluenesulphonate complex with 4-methylpyridine of composition [Ag(CH3C5H4N)2(CH3C6H4SO3)]

“…Silver(I) compounds are useful reagents for catalytic systems in science and technology [1,2] and have been extensively investigated over recent years, due to their exclusive properties (optical, magnetic, etc. [3][4][5]).…”

Portable and Disposable Paper-Based Fluorescent Sensor for In Situ Gaseous Hydrogen Sulfide Determination in Near Real-Time

“…Mercury-complexing agents such as alkaline fluorescein mercuric acetate (FMA) have been widely employed for sulfhydryl group determination. 24−26 Zinc, 27 ruthenium, 28 palladium, 29 silver, 30 and copper 31 have also been used as luminescent metal-based probes.…”

“…In the case of H 2 S, several luminescent metal-based complexes have been used as sulfide recognition and determination probes. Mercury-complexing agents such as alkaline fluorescein mercuric acetate (FMA) have been widely employed for sulfhydryl group determination. − Zinc, ruthenium, palladium, silver, and copper have also been used as luminescent metal-based probes.…”