The present study investigates a simple method for the biosynthesis of silver chloride nanoparticles (AgCl-NPs) at 37 °C using Beta vulgaris peel extract. TEM morphology assessed that the diameter of stable AgCl-NPs was approximately 10 nm and EDAX spectrum confirmed the presence of silver ion, chloride ion and other elements in the plant metabolite. The photocatalytic activity of AgCl-NPs in the colour reduction of Methyl blue (MB) was evaluated by UV-vis spectrophotometer. These results showed that AgCl-NPs have significant catalytic activity of methylene blue. Also it showed good antioxidant activity as compared to standard ascorbic acid. © 2015 Elsevier B.V. All rights reserved.

Mohana Roopan S

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Kumar D.A

Palanichamy V

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Materials Letters

Polymer Gels Gels Horizons: From Science to Smart Materials

Radiation Dosimetry—A Different Perspective of Polymer Gel

Currently phytochemical approach for the synthesis of metal nanoparticles plays a major role. In this manuscript phytochemical synthesis of Ni-Pd bi-metallic nanoparticles (Ni-Pd NPs) were subjected for various biological applications like pesticidal, larvicidal and ovicidal activities. The synthesized Ni-Pd NPs were confirmed by various characterization techniques, The XRD pattern confirms the formation of Ni-Pd NPs in purest crystalline form and it matches with the Joint Committee Powder Diffraction Standard data of JCPDS: 65-5788. The crystalline sizes of bi-metallic nanoparticles were found to be 33 nm which is calculated from Scherrer equation. TEM images clear cuts the spherical particle of Pd NPs with over layered by Ni NPs. The TEM histogram analysis helps to find the average particle size of Ni-Pd NPs as 34 ± 2 nm. The EDAX spectrum also confirms the presence of palladium and nickel atom. Further the synthesized bi-metallic nanoparticles were subjected for larvicidal activity against Aedes aegypti (A. aegypti) which resulted in LC50 and LC90 of 288.88 ppm and 483.06 ppm respectively. Also in this manuscript phyto-synthesized Ni-Pd NPs were subjected to antifeedant activity against Callosobruchus maculatus (C. maculatus) and ovicidal activity against eggs of C. maculatus were performed. © 2016

Journal of Molecular Liquids

Coir mediated instant synthesis of Ni-Pd nanoparticles and its significance over larvicidal, pesticidal and ovicidal activities

A new series of brominated derivatives of 2, 3-dihydroquinazolin-4(1H)-one were synthesized and their structures were confirmed using IR, NMR and mass spectra. The synthesized derivatives were screened for their in vitro anthelmintic activity. The investigations on interaction of the bioactive compound, 2i with bovine serum albumin (BSA) were evaluated. The quenching mechanism of the compound, 2i was deduced based on the results of Stern–Volmer equation. The number of binding site, prediction of binding site region and the changes in the secondary structure of protein were predicted using various spectroscopic studies.

Journal of Luminescence

Study of binding interaction between anthelmintic 2, 3-dihydroquinazolin-4-ones with bovine serum albumin by spectroscopic methods

Poly(adenosine diphosphate-ribose) polymerase (PARP) is a group of enzymes with several subtypes and it manages various ailment such as cancer, inflammatory disorders, diabetes mellitus, neuronal injury, HIV infection, Parkinsonism, aging, and ischemia-reperfusion injury. Various PARP inhibitors share a common property of bicyclic lactam in its main structural frame. The core moiety containing bicyclic lactam rings are isoquinolinones, dihydroisoquinolinones, quinazolinediones, phthalazinones, quinazolinones, and phenanthridones. The quinazolinone with diverse substituents displayed low nanomolar inhibition. Quinazolinone is an important and vital molecule in the field of medicinal chemistry possessing multitude pharmacological actions. Though the chemistry of quinazolinones has been discussed through centuries, its concise role on PARP inhibition needed a special consideration. The aim of this review is to discover the effect of quinazolinone substitutents and its role in PARP inhibition. This precise review will discuss the effect of quinazolinones on PARP subtypes such as PARP-1, PARP-2, PARP-5a, and PARP-5b. In addition to its pharmacological actions, PARP inhibitors can also act as a chemosensitizing agent, and it is used in combination with the other anticancer agents. This summarization will definitely be a supportive report for the scientist working toward the novelty in the quinazolinone nucleus and its role in PARP inhibition.

Applied Microbiology and Biotechnology

Inhibition of poly(adenosine diphosphate-ribose) polymerase using quinazolinone nucleus

Palladium nanoparticles (Pd NPs) are the very good catalytic agents in many coupling reactions, also these are very well biological agents against bacteria and fungus. M. oleifera capped Pd NPs were synthesized from microwave assisted methanolic extract of M. oleifera peel. To optimize the extraction process RSM (Response Surface Methodology) was applied. To get a good extraction yield BBD (Box-Behnken Design) was employed. The better optimized conditions for the extraction was found as 400 W, 25 mL of CH3OH at 65 °C for 2 min. We observed 61.66 mg of extract yield from this method. Eco-friendly M. oleifera capped Pd NPs were synthesized using M. oleifera peel extract and confirmed using the different characterization techniques like UV- Vis spectroscopy, XRD, SEM and HR-TEM analysis. We found the size of the M. oleifera capped Pd NPs nanoparticles as 27 ± 2 nm and shape of the particles as spherical through the TEM analysis. M. oleifera capped Pd NPs exhibits good antibacterial activity against S. aureus (Staphylococcus aureus) and E. coli (Escherichia coli) bacterial strains and we found the zone inhibition as 0.6 and 0.7 mm. The synthesized M. oleifera capped Pd NPs are screened for hemolytic activity and it proved the M. oleifera capped Pd NPs are non-toxic on RBCs cells. © 2016 Elsevier B.V.

Journal of Photochemistry and Photobiology B: Biology

RSM optimized Moringa oleifera peel extract for green synthesis of M. oleifera capped palladium nanoparticles with antibacterial and hemolytic property

A green rapid biogenic synthesis of silver nanoparticles AgNPs using Alternanthera dentata (A. dentata) aqueous extract was demonstrated in this present study. The formation of silver nanoparticles was confirmed by Surface Plasmon Resonance (SPR) at 430 nm using UV-visible spectrophotometer. The reduction of silver ions to silver nanoparticles by A. dentata extract was completed within 10 min. Synthesized nanoparticles were characterized using UV-visible spectroscopy; Fourier transformed infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy and transmission electron microscopy (TEM). The extracellular silver nanoparticles synthesis by aqueous leaf extract demonstrates rapid, simple and inexpensive method comparable to chemical and microbial methods. The colloidal solution of silver nanoparticles were found to exhibit antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia and, Enterococcus faecalis. © 2014 Elsevier B.V. All rights reserved.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Green synthesis of silver nanoparticles using Alternanthera dentata leaf extract at room temperature and their antimicrobial activity

Recently, in all over the world, nanotechnology plays a major role in various applications. Most of the researchers focused their work on bimetallic nanoparticles due to their several modes or mechanisms of synthesis such as chemical, physical, and biosynthesis methods. These nanoparticles are of great interest due to their enormous applications and catalytic activities. Currently, syntheses of bimetallic nanoparticles using different sources of natural products are focused due to their advantage of being nontoxic to human and environment. To our knowledge, there is no report on the review of bimetallic nanoparticles and their medicinal applications. Taking this fact into account, we discussed the various synthesizing methods of bimetallic nanoparticles and their application related to biology. © 2014 Springer-Verlag.

Biosynthetic trends and future aspects of bimetallic nanoparticles and its medicinal applications

Green chemistry is playing an important role for synthesizing organic compounds, due to its eco-friendly nature and low cost. In green chemistry, metal nanoparticles exhibited some useful physical and chemical properties (catalytic activity). Due to its diverse properties, nanoparticles can be utilized as a catalyst in various organic reactions. Recent research has been directed towards the utilization of eco-friendly and bio-friendly plant materials in nanoparticles synthesis. In our present work, TiO2 nanoparticles (TiO2 NPs) were synthesized using Annona squamosa peel extract and their catalytic applications were studied on the 2,3-disubstituted dihydroquinazolin-4(1H)-one synthesis. Synthesized compounds were confirmed using FT-IR, 1H NMR, 13C NMR and GC-MS analyses. © 2013 Selvaraj Mohana Roopan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

Chinese Chemical Letters

Catalytic activity of TiO2 nanoparticles in the synthesis of some 2,3-disubstituted dihydroquinazolin-4(1H)-ones

Heterocyclic motif is an important scaffold which has both industrial and pharmaceutical applications. These motifs can be prepared using wide variety of reaction conditions such as the use of expensive catalyst, toxic solvent, harsh reaction condition like the use of base, high temperature, and multistep reaction. Although various methods are involved, the chemistry arena is now shifted towards the greener way of synthesis. Nanocatalyst constitutes an important role in the green synthesis. This is because the activity of the catalyst resides in the exposed portion of the particles. By decreasing the size of the catalyst, advantages such as more surface area would be exposed to the reactant, only negligible amount would be required to give the significant result and selectivity could be achieved, thereby, eliminating the undesired products. The current review enlists the various types of nanocatalyst involved in the heterocyclic ring formation and also some other important functionalization over the ring.

Fulltext

Journal of Nanomaterials

Function of Nanocatalyst in Chemistry of Organic Compounds Revolution: An Overview

In the present study, the biosynthesis of rutile TiO2 nanoparticles (TiO2 NPs) was achieved by a novel, biodegradable and convenient procedure using fruit peel Annona squamosa aqueous extract. This is the first report on the new, simple, rapid, eco-friendly and cheaper methods for the synthesis of rutile TiO2 NPs at lower temperature using agricultural waste. Rutile TiO2 NPs were characterized by UV, XRD, SEM, TEM and EDS studies. The UV-Vis spectrophotometer results were promising and showed a rapid production of TiO2 NPs with a surface plasmon resonance occurring at 284 nm. The formation of the TiO2 NPs as observed from the XRD spectrum is confirmed to be TiO2 particles in the rutile form as evidenced by the peaks at 2θ = 27.42°, 36.10°, 41.30° and 54.33° when compared with the literature. The TEM images showed polydisperse nanoparticles with spherical shapes and size 23 ± 2 nm ranges. © 2012 Elsevier B.V. All rights reserved.

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Publisher	Data powered by TypesetElsevier BV
ISSN	0167-577X
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