Vitex negundo assisted green synthesis of metallic nanoparticles with different applications: a mini review

Abstract

Background Several attempts have been made for green synthesis of nanoparticles of different metals and metal oxides, revealing the significance of plant extracts in reducing metal source to nanoparticles and applications in various scientific domains. Main body The present article focus on applications of Vitex negundo leaves extract in fabrication of nanoparticles of various metals like silver, gold, zinc oxide, and copper oxide. Vitex negundo is evergreen, perennial shrub, belonging to family Verbenaceae. Its leaves are reported to contain several phytochemicals like iridoids, flavonoids, and their glycosides, terpenoids. In respective research attempts, these metallic nanoparticles were evaluated for one or more applications like anti-microbial activity and/or photocatalytic activity. Conclusions Use of V. negundo polar extract indicated involvement of its polar phytocompounds in reducing the metal source and stabilizing the nanoparticles. In conclusion, it could be noted that metal nanoparticles have better antimicrobial activity and photocatalytic potential over aqueous leaves extract.

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“…There are many studies that show that Silver is stable in water [79]. Zarghar and colleagues reported the production of silver particles using the leaf extract of Vitex negundo and the antibacterial activity of silver particles against Gram-positive and Gram-negativebacteria [80].…”

Phytochemicals Present in Cajanus cajan and its Use in Green Synthesis of Metal and Metal Oxide Nanoparticles

“…It has been studied thoroughly and used in solar cells, photo catalysts transistors, piezoelectric transducers and gas sensors. 14 Considering these applications of zinc oxide, in 2014, Manjunath et al attempted to develop facile method for preparation of high quality ZnO with uniform morphologies in the form of zinc oxide nanoparticles using C. cajan leaves powder. They mixed zinc nitrate and pigeon pea ground powder (1:1) and stirred for 10 min in double distilled water.…”

Formulation of a herbal tea bag with potential in vitro thrombolytic activity using Adhatoda vasica Linn (Pawatta), Vitex negundo Linn (Nika), and Caesalpinia bonduc Linn (Kumburu)

“…A variety of pharmacological properties have been reported and exhibited in A. vasica including; antimicrobial [8], hepatoprotective [9], anti-inflammatory [10], antitussive [11], thrombolytic [12], antioxidant activities and help in radio modulation and reproductive functions [13], cardiovascular and mutation protection [14]. Vitex negundo has demonstrated antimicrobial [15], antiinflammatory [16], anti-cancer [17], anti-diabetic and anti-oxidant activities [18]. Caesalpinia bonduc is a thorny shrub that is found all over the world, particularly in India and Sri Lanka.…”