scholarly journals Antifungal Activities and Characterization of Some New Environmentally Safe Cu (II) Surfactants Substituted 2-Amino-6-Methyl Benzothiazole

2018 ◽  
Vol 5 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Arun Kumar Sharma ◽  
Rashmi Sharma ◽  
Antima Gangwal
Keyword(s):  
Metal Ion ◽  
Antimicrobial Agents ◽  
Positive Charge ◽  
Central Atom ◽  
Central Metal ◽  
Antifungal Activities ◽  
Environmentally Safe ◽  
Anti Fungal ◽  
Lipophilic Character

Background:Biologically potent compounds are one of the most important classes of materials for the upcoming generations.Objectives:Increasing number of microbial infectious diseases and resistant pathogens create a demand and urgency to develop novel, potent, safe and improved variety of antimicrobial agents.Methods:The copper surfactants substituted 2-amino-6-methyl benzothiazole were synthesized. The synthesized complexes have been characterized by IR, NMR, ESR spectroscopic methods. The antifungal activities have been evaluated by testing againstAlternaria alternatefungi. All complexes showed good antifungal activity because chelation increases the anti-microbial potency.Result:The studies suggest that the copper (II) ions in soaps may be responsible for the enhancement of the activity against fungi. The evaluation of anti -fungal studies further revealed that fungitoxicity of the complexes also depends on the nature of metal ions. The chelation reduces the polarity of central metal ion mainly because of partial attaining of its positive charge with the donor groups and possible π- electron delocalization over the whole chelate ring. Such chelation increases the lipophilic character of the central atom, which subsequently favors its permeation through the lipoid layer of the cell membrane. Their efficiency increases with their concentration.

scholarly journals Anti-Fungal Efficacy and Mechanisms of Flavonoids

Antibiotics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 45 ◽  
Author(s):  
Mohammed Saleh Al Aboody ◽  
Suresh Mickymaray
Keyword(s):  
Side Effects ◽  
Antimicrobial Agents ◽  
Fungal Infections ◽  
Fungal Diseases ◽  
Antifungal Activities ◽  
Naturally Occurring ◽  
Antifungal Effects ◽  
Natural Drugs ◽  
Anti Fungal ◽  
Synergistic Combinations

The prevalence of fungal infections is growing at an alarming pace and the pathogenesis is still not clearly understood. Recurrence of these fungal diseases is often due to their evolutionary avoidance of antifungal resistance. The development of suitable novel antimicrobial agents for fungal diseases continues to be a major problem in the current clinical field. Hence, it is urgently necessary to develop surrogate agents that are more effective than conventional available drugs. Among the remarkable innovations from earlier investigations on natural-drugs, flavonoids are a group of plant-derived substances capable of promoting many valuable effects on humans. The identification of flavonoids with possible antifungal effects at small concentrations or in synergistic combinations could help to overcome this problem. A combination of flavonoids with available drugs is an excellent approach to reduce the side effects and toxicity. This review focuses on various naturally occurring flavonoids and their antifungal activities, modes of action, and synergetic use in combination with conventional drugs.

Synthesis and Characterization of (1, 4)-4-benzylidene-1-(1- phenylethylidene) thiosemicarbazide and their Antifungal Activities

10.26524/sa2 ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 08-19
Author(s):  
L Ilavarasan ◽  
A Ravi ◽  
M Ganapathi ◽  
R Sapthagiri ◽  
K Mohanraj ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Schiff Bases ◽  
1H Nmr ◽  
Conventional Method ◽  
Research Work ◽  
Synthesis And Characterization ◽  
Antifungal Activities ◽  
Aryl Aldehydes ◽  
Anti Fungal

The Present research work is aimed to synthesize a serious of various substituted Schiff bases compounds of 1-(1-phenylethylidene)thiosemicarbazide form (1,4)-4-benzylidene-1-(1-phenylethylidene)Thiosemicarbazide condenses with Four different substituted aryl aldehydes under Microwave irradiation and conventional method. The structure for compounds has been determined by UV, FTIR, 1H-NMR and Mass s spectroscopy. All the compounds are evaluated for its anti-fungal activity.

Synthesis and characterization of novel phthalocyanines with nitrone substituents

2007 ◽  
Vol 11 (01) ◽  
pp. 42-49 ◽  
Author(s):  
B. Narayana Achar ◽  
T. M. Mohan Kumar
Keyword(s):  
Electrical Conductivity ◽  
Metal Ion ◽  
Activation Parameters ◽  
Central Metal ◽  
Metal Phthalocyanines ◽  
Lattice Constants ◽  
X Ray Crystallography ◽  
Uv Visible ◽  
First Time

A novel series of nitrone-substituted, metal phthalocyanine complexes (the central metal ion being Co , Ni and Cu , respectively) were synthesized for the first time in pure state with quantitative yield. These complexes were characterized using elemental analysis, UV-visible, IR-spectroscopy, magnetic susceptibility, X-ray crystallography, and thermogravimetry. All three complexes had a monoclinic structure with different crystal lattice constants. Horowitz-Metzger, Coats-Redfern and Broido's relations were employed to calculate the kinetic and activation parameters associated with the thermal decomposition of the above complexes. Electrical conductivity studies were undertaken for all three complexes using a two-probe technique in the temperature range 30-200°C. They showed an improvement of 103-105 times the electrical conductivity at room temperature, compared to the corresponding unsubstituted metal phthalocyanines.

Design, synthesis and characterization of new 1,2,3-triazolyl pyrazole derivatives as potential antimicrobial agents via a Vilsmeier–Haack reaction approach

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59375-59388 ◽  
Author(s):  
Manjunatha Bhat ◽  
Nagaraja G. K. ◽  
Reshma Kayarmar ◽  
Peethamber S. K. ◽  
Mohammed Shafeeulla R
Keyword(s):  
Antimicrobial Agents ◽  
Synthesis And Characterization ◽  
Pyrazole Derivatives ◽  
Design Synthesis ◽  
Anti Oxidant ◽  
Anti Fungal

A new series of 1,2,3-triazolyl pyrazole derivatives were synthesisedviaa Vilsmeier–Haack reaction approach and screened for theirin vitroanti-bacterial, anti-fungal and anti-oxidant activities.

scholarly journals Iron based metal organic framework as an effective lead ions remover from aqueous solution: Thermodynamic and kinetics studies

2017 ◽  
Vol 71 (3) ◽  
pp. 221-229 ◽  
Author(s):  
Ntaote Shooto ◽  
Ezekiel Dikio ◽  
Donbebe Wankasi ◽  
Lucky Sikhwivhilu
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Metal Organic Framework ◽  
Lead Ions ◽  
Central Metal ◽  
Kinetic And Thermodynamic Parameters ◽  
Adsorption Affinity ◽  
Metal Organic ◽  
Ft Ir

Metal organic frameworks (MOFs) based on iron as a central metal ion and 1,2,4,5-tetrabenzenecarboxylic acid as ligand was successful synthesized, characterized and studied as adsorbent for the removal of lead ions in aqueous solution. Characterization of Fe-MOF was attained by SEM, EDX, TGA and FT-IR techniques. EDX spectrum showed the presence of C, O and Fe, which may facilitate in creating charges and functionalities on the surface of the Fe-MOF for adsorption. The kinetic and thermodynamic parameters were also investigated. The results showed that Fe-MOF has a high Pb2+ adsorption affinity. The removal of Pb2+ from aqueous solutions varied with concentration, contact time and temperature. All adsorption studies were carried out in batch experiments.

Synthesis and Characterization of New Zinc Phthalocyanine - Dodecenyl Succinic Anhydride Benzoic Groups

2020 ◽  
Vol 17 (6) ◽  
pp. 488-495
Author(s):  
Hussein Ali Al-Bahrani ◽  
Mohanad Mousa Kareem ◽  
Abdul Amir Kadhum ◽  
Nour A. Alrazzak
Keyword(s):  
Salicylic Acid ◽  
Succinic Anhydride ◽  
Zinc Phthalocyanine ◽  
Central Metal ◽  
Target Compound ◽  
Compound I ◽  
Metal Phthalocyanines ◽  
Metal Atoms ◽  
Amino Salicylic Acid

Background: The phthalocyanines a series of compounds involves four iso-indole units linked by aza nitrogen atoms bonded with metal atoms that are normally located in the center a phthalocyanines ring. Some of the central metal-phthalocyanines can be excited by ultraviolet light and emit a fluorescence in far-red region. Objective: To synthesize a derivative of phthalocyanines namely 4,4',4' '-tri-(dodecenyl succinic anhydride)- 4' ' '-(5-amino salicylic acid) zinc phthalocyanine with a zinc central metal. Materials and Methods: The reaction of 4- nitro Phthalonitrile and 4- amino Phthalonitrile with ZnCl2 in the presence of dimethyl amino ethanol afforded 4,4',4' '-triamino-4' ' '-nitro zinc phthalocyanine. This product reacted with 5-amino salicylic acid to yield tetra-(5-amino salicylic acid) zinc phthalocyanine. A dodecenyl succinic anhydride was added on the amine group of benzoic rings to afford 4,4',4' '-tri-(dodecenyl succinic anhydride)-4' ' '-(5-amino salicylic acid) zinc phthalocyanine(I), the target compound. Results and Discussion: Compound I is successfully synthesized with a yield of 72% from tetra-(5-amino salicylic acid) zinc phthalocyanine with dodecenyl succinic anhydride. Conclusion: The newly synthesized molecule of 4,4',4' '-tri-(dodecenyl succinic anhydride)-4' ' '-(5-amino salicylic acid) zinc phthalocyanine (I), tetra-(5-amino salicylic acid) zinc phthalocyanine(E) and 4,4',4' '- triamino-4' ' '-nitro zinc phthalocyanine (S). The reaction of 4- nitro Phthalonitrile and 4- amino and the structure of compound I is confirmed and its formation was proven.

Protonation effects on dynamic flux properties of aqueous metal complexes

2009 ◽  
Vol 74 (10) ◽  
pp. 1543-1557 ◽  
Author(s):  
Herman P. Van Leeuwen ◽  
Raewyn M. Town
Keyword(s):  
Complex Formation ◽  
Metal Ion ◽  
Good Description ◽  
Minor Component ◽  
Outer Sphere ◽  
Metal Species ◽  
Central Metal ◽  
Inner Sphere ◽  
A Minor ◽  
Protonated Ligand

The degree of (de)protonation of aqueous metal species has significant consequences for the kinetics of complex formation/dissociation. All protonated forms of both the ligand and the hydrated central metal ion contribute to the rate of complex formation to an extent weighted by the pertaining outer-sphere stabilities. Likewise, the lifetime of the uncomplexed metal is determined by all the various protonated ligand species. Therefore, the interfacial reaction layer thickness, μ, and the ensuing kinetic flux, Jkin, are more involved than in the conventional case. All inner-sphere complexes contribute to the overall rate of dissociation, as weighted by their respective rate constants for dissociation, kd. The presence of inner-sphere deprotonated H2O, or of outer-sphere protonated ligand, generally has a great impact on kd of the inner-sphere complex. Consequently, the overall flux can be dominated by a species that is a minor component of the bulk speciation. The concepts are shown to provide a good description of experimental stripping chronopotentiometric data for several protonated metal–ligand systems.

scholarly journals Ni Oxidation State and Ligand Saturation Impact on the Capability of Octaazamacrocyclic Complexes to Bind and Reduce CO2

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4139
Author(s):  
Barbora Vénosová ◽  
Ingrid Jelemenská ◽  
Jozef Kožíšek ◽  
Peter Rapta ◽  
Michal Zalibera ◽  
...  
Keyword(s):  
Quantum Theory ◽  
Oxidation State ◽  
Central Atom ◽  
Population Analysis ◽  
Mulliken Population Analysis ◽  
Mulliken Population ◽  
Theoretical Methods ◽  
Ni Oxidation ◽  
Shed Light

Two 15-membered octaazamacrocyclic nickel(II) complexes are investigated by theoretical methods to shed light on their affinity forwards binding and reducing CO2. In the first complex 1[NiIIL]0, the octaazamacrocyclic ligand is grossly unsaturated (π-conjugated), while in the second 1[NiIILH]2+ one, the macrocycle is saturated with hydrogens. One and two-electron reductions are described using Mulliken population analysis, quantum theory of atoms in molecules, localized orbitals, and domain averaged fermi holes, including the characterization of the Ni-CCO2 bond and the oxidation state of the central Ni atom. It was found that in the [NiLH] complex, the central atom is reduced to Ni0 and/or NiI and is thus able to bind CO2 via a single σ bond. In addition, the two-electron reduced 3[NiL]2− species also shows an affinity forwards CO2.

scholarly journals Preparation and characterization of nucleotide-free and metal ion-free p21 “apoprotein”.

1987 ◽  
Vol 262 (18) ◽  
pp. 8455-8458 ◽  
Author(s):  
J Feuerstein ◽  
R S Goody ◽  
A Wittinghofer
Keyword(s):  
Metal Ion
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