Synthesis, Spectral, Structural and Antimicrobial Studies of Silver Nanoparticles and Ag(I) Complex of 2-Mercaptobenzothiazole

Abstract

In the present study, Ag(I) complex is synthesized by reacting silver nitrate with ligand (2-mercaptobenzothiazole) in a 1:2 mole ratio. Furthermore, silver nanoparticles were prepared by the reduction of AgNO3 using 2-mercaptobenzothiazole in dilute aqueous sodium citrate buffer solution. The Ag(I) complex are characterized by elemental analyses, flame atomic absorption, thermogravimetric analyses, molar conductance and magnetic susceptibility, UV-visible as well as FTIR spectroscopy. Analyses, linear geometry is suggested for the Ag(I) complex. The prepared nanoparticles are characterized using X-ray diffraction, scanning electron microscopy, energy dispersive microscopy, atomic force microscopy, vibrational and electronic spectroscopy. X-ray diffraction analysis revealed that silver nanoparticles with fcc crystal structure. The SEM micrographs indicated that the morphology is nearly rods shaped structure with an average diameter of about 100 nm. Biological activities of the ligand and its Ag(I) complex and silver nanoparticles are tested against Staphylococcus aureus, Escherichia coli bacteria and Candida albicans, Candida tropicalis fungi. It was found that both Ag(I) complex and silver nanoparticles have antimicrobial activities.

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“…The spectrum of [AgL(H2O)2]NO3.H2O complex Figure (9) shows bands at 418, 320, and 288nm; the latter band may arise from charge transfer [23]. Conductivity measurement in DMF shows that the complexes were ionic, in addition to these data and that obtained from atomic absorption analysis, infrared spectra, which shows the complex to be conducted, a trigonal geometry around Ag(I).…”

Electromagnetic interference shielding effectiveness of polypyrrole-silver nanocomposite films on silane-modified flexible sheet

“…[43][44][45] The second weight loss, starting at around 200°C, which is not observed in substrate samples, can be attributed to the decomposition of organic groups (PPy chains), 46 or to the removal of nitrate dopant anions from PPy chains. 35,[47][48][49] The third weight loss at approximately 435°C, the same observed in BOPET thermograms, can be associated to the thermal degradation of the polymer substrate (BOPET).…”

Alkyl 2-Benzothiazolyl Sulfide Ligated Dirhenium Complexes: Syntheses, Structure and Computational Study of [Re2(CO)8{μ,η1,η1-(R)SCNSC6H4}] (R = CH3 and C2H5)

“…These reactions often involve the oxidative cleavage of the rhenium-rhenium bond together with the reductive S─H, N─H or S─S bond scission in the ligands [1][2][3][4][5][6]. 2-Mercaptobenzothiazole and its derivatives are the subjects of interest in coordination and organometallic chemistry [14][15][16][17][18][19][20][21][22][23][24] because many of their metal complexes show antiviral, antibacterial and antifungul activity in the biological system. This ligand may coordinate metal ions in thiol and the tautomeric thione forms as well as the deprotonated form (Chart 1).…”

“…This ligand may coordinate metal ions in thiol and the tautomeric thione forms as well as the deprotonated form (Chart 1). Over the last few decades, metal complexes of 2-mercaptobenzothiazole and its derivatives, and their biological activities have been reported [14][15][16][17][18][19][20][21][22][23]. Derivatization of 2-mercaptobenzothiazole by inserting an alkyl group with the exocyclic sulfur atom makes a restriction of the existence of deprotonated form.…”