Synthesis, characterization, optical and anti-bacterial properties of benzothiazole Schiff bases and their lanthanide (III) complexes

Mishra, Neha; Kumar, Kaushal; Pandey, Himanshu; Anand, Satyesh Raj; Yadav, Ritu; Srivastava, S. P.; Pandey, Rampal

doi:10.1016/j.jscs.2020.09.009

Cited by 36 publications

(17 citation statements)

References 54 publications

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“…The results show that the bis-Schiff bases of chitosan showed higher antifungal activity than chitosan, especially at 1.0 mg/mL. Specifically, derivatives bearing halogenobenzenes (50)(51)(52) showed IIs higher than 95% at 1.0 mg/mL against B. cinerea (versus chitosan 23.8%), and this high activity was attributed to the halogen with stronger electronwithdrawing properties.…”

Section: Schiff Bases With Antifungal Activitymentioning

confidence: 91%

“…In the study of Mishra et al (2020) [51] the synthesis and antibacterial evaluation of two SB ligands comprising benzothiazole derivatives, namely (N,N′,E,N,N′E)-N,N′-(1,3phenylenebis(methanylylidene))bis (5-nitrobenzo[d]thiazoL2-amine ( 9) and (N,N′,E,N,N′E)-N,N′-(1,3-phenylene-bis(methanylylidene))bis(5-methylthiazo-L2-amine (10) and their lanthanide (III) complexes were described. Ligands showed antibacterial activity against S. aureus causing skin infection and food poisoning and pimple-causing Propionic bacteria acnes.…”

Section: Schiff Bases With Antibacterial Activitymentioning

confidence: 99%

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A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

et al. 2022

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Schiff bases (SBs) have extensive applications in different fields such as analytical, inorganic and organic chemistry. They are used as dyes, catalysts, polymer stabilizers, luminescence chemosensors, catalyzers in the fixation of CO2 biolubricant additives and have been suggested for solar energy applications as well. Further, a wide range of pharmacological and biological applications, such as antimalarial, antiproliferative, analgesic, anti-inflammatory, antiviral, antipyretic, antibacterial and antifungal uses, emphasize the need for SB synthesis. Several SBs conjugated with chitosan have been studied in order to enhance the antibacterial activity of chitosan. Moreover, the use of the nanoparticles of SBs may improve their antimicrobial effects. Herein, we provide an analytical overview of the antibacterial and antifungal properties of SBs and chitosan-based SBs as well as SBs-functionalized nanoparticles. The most relevant and recent literature was reviewed for this purpose.

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Section: Schiff Bases With Antifungal Activitymentioning

confidence: 91%

Section: Schiff Bases With Antibacterial Activitymentioning

confidence: 99%

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

et al. 2022

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“…In this work, we design and synthesized transition metal complexes with Schiff base 35 . These Schiff base of 5-nitrobenzo [d] thiazoL2-amine (NTA) and 1, 3-phenylene bis (methanylylidene)) bis (5-methyl thiazo L2-amine (MTA) were prepared in same manner following our previous work (36). Here we continue their structural and electrochemical study with coordination complexes formation with Co(II), Ni (II), Cu (II), Zn (II) and Cd (II).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Transition Metal Complexes Containing Thiazole Derived Schiff Base Ligands

et al. 2022

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Although ligands containing four donor atom are tetradentate ligand of Thiazole moiety which coordinated with transition metal ions. The complex of m-NTA and m-MTA are studies by different spectral technique. Here we are synthesizing the thiazole derivatives Schiff base as a ligands, L1 = N,N'E,N,N'E)-N,N'-(1,3- phenylene bis (methanylylidene) bis (5-nitrobenzo [d] thiazo L2-amine (NTA) and L2 = N,N'E,N,N'E)-N,N'-(1,3-phenylene bis (methanylylidene) bis (5-methyl thiazo L2-amine (MTA), and coordinated with transition metals ( Co, Ni, Cu, Zn, and Cd) using lone-pair coordination method. These synthesized complexes were identified by FT-IR spectra, UV-Visible spectra, mass spectra and cyclic voltammetry and having characteristic absorption and potential high-performance CV which show a different type of stable transition metal complex. The electrochemical study was also carried out for these complexes which show the clear redox behaviour of complexes. The significant change in CV properties is exhibited by CV graphs where we can see a prominent reduction peaks M (II) to M is showing at -0.4 V . We found that in the case of L2 there is less prominent reduction peaks observed in comparison to L1.

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“…The nine atoms of the bicycle together with the attached substituents are coplanar. One of the most important parts of scaffolds for the preparation of dyes that are used in the identification of lanthanide metal ions in aqueous media is benzothiazole ring 1 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of New Benzothiazole-derived Schiff Bases Metal Complexes

2022

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Nitrogen-comprising heterocyclic compounds and their derivatives have empirically been invaluable as therapeutic agents. Fundamentally, 4-chloro-6-nitro-2-amino-1,3-benzothiazole 1 was synthesized via bromination of 2-chloro-4-nitro aniline with ammonium thiocyanate. This new heterocyclic haloorganoamino-1,3-benzothiazole derivative, was a starting material, which condensed and tethered with three different aromatic aldehyde pendant arm in presence of ethanol and glacial acetic acid isolating an interesting sequence of tridentate Schiff bases 2-4. These compounds were used for complexation reactions in 1:1 (metal: ligand) stoichiometry to obtain heteroleptic Al(III), Ni (II) and K(I) benzothiazole chelates 5-7(a-c) of the type [Al(L)Cl 2 , Ni(L)Cl, K(L) {L = Schiff base derivatives}]. The newly synthesized complexes were characterized by the melting points, IR and some of them by 1 H-NMR spectroscopy and only one by X-ray techniques. The structures of complexes were anticipated from the spectroscopic studies.

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Synthesis, characterization, optical and anti-bacterial properties of benzothiazole Schiff bases and their lanthanide (III) complexes

Cited by 36 publications

References 54 publications

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

Synthesis and Properties of Transition Metal Complexes Containing Thiazole Derived Schiff Base Ligands

Synthesis and Characterization of New Benzothiazole-derived Schiff Bases Metal Complexes

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