News Update on Aqueous Medium Research: Sep – 2019

Mechanistic Study on the Replacement Reaction between Silver Nanostructures and Chloroauric Acid in Aqueous Medium

The replacement reaction between silver nanostructures associate degreed an liquid HAuCl4 answer has recently been incontestable  as a flexible methodology for generating metal nanostructures with hollow interiors. Here we have a tendency to describe the results of a scientific study description the morphological, structural, integrative, and spectral changes concerned in such a heterogeneous reaction on the nanoscale. 2 distinctive steps are resolved through a mix of microscopic and spectroscopical ways. within the start, silver nanostructure (i.e., the example) is dissolved to come up with gold atoms that square measure deposited epitaxially on the surface of every template. Silver atoms conjointly diffuse into the gold shell (or sheath) to create a seamless, hollow nanostructure with its wall manufactured from Au−Ag alloys. [1]

High melatonin solubility in aqueous medium

The pineal secretion endocrine (5‐methoxy‐N‐acetyl‐tryptamine) has been reported  to participate in vital physiological processes. though a number of its biological actions appear to rely on a supermolecule receptor at the membrane surface, endocrine is understood to act with an outsized form of tissues and cells, suggesting that the molecule might not essentially act through a particular membrane receptor at a specific cell. Most discussions of endocrine activity have assumed that the molecule is very hydrophobic. Contrary to belief, this work shows that endocrine is soluble in an exceedingly strictly binary compound medium up to five ± 10‐3 M and describes a brand new methodology of melatonin preparation that shows the high hydrophilicity of the molecule. [2]

Complete Destruction of p-Nitrophenol in Aqueous Medium by Electro-Fenton Method

An indirect chemistry technique, that is extremely economical for the degradation of organic pollutants in water, is delineate. The method, named electro-Fenton, relies on electrocatalytical generation of Fenton’s chemical agent to supply chemical group radicals, that are terribly active toward organic compounds. associate degree industrial waste matter, p-nitrophenol (PNP), was chosen for this study and was eventually mineralized. the most important negotiator degradation merchandise like hydroquinone, quinone, 4-nitrocatechol, 1,2,4-trihydroxybenzene and three,4,5-trihydroxy- organic compound were without ambiguity known by HPLC and GC-MS ways. the speed constants of the hydroxylation reactions were determined. [3]

Compartmentalization-induced phosphorescent emission enhancement and triplet energy transfer in aqueous medium

Triplet energy transfer happens oftentimes in natural photosynthetic  organisms to shield against photo-oxidative stress. For artificial light-harvesting systems, many challenges have to be compelled to be self-addressed to appreciate triplet energy transfer particularly in liquid medium. Specifically, the phosphors ought to be protected  from water and molecular element, that facilitate to take care of intense emission intensity. Moreover, the donor‒acceptor phosphors ought to be organized in shut proximity, however at the same time avoiding direct homo- and hetero-interactions to attenuate the P.E. losses. [4]

Sequestration of Hexavalent Chromium from Aqueous Medium Using Biochar Prepared from Water Hyacinth Biomass

The global issue related to the health of atmosphere and human is that the quality of water. a significant} threat to the aquatic atmosphere through phylogeny activities is that the heavy metal pollution. to shield our surroundings from the intense threats of contamination and to save lots of several lives, it’s essential to get rid of metal from sewer water. This paper reports the use of the water orchid biochar, a carboniferous material as adsorbent for removal of hexavalent atomic number 24 (Cr(VI)) from solution. The experiment was dole out within the Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore in an exceedingly utterly irregular style with four replications. [5]

Reference

[1] Sun, Y. and Xia, Y., 2004. Mechanistic study on the replacement reaction between silver nanostructures and chloroauric acid in aqueous medium. Journal of the American Chemical Society, 126(12), pp.3892-3901. (Web Link)

[2] Shida, C.S., Castrucci, A.M.D.L. and Lamy‐Freund, M.T., 1994. High melatonin solubility in aqueous medium. Journal of pineal research, 16(4), pp.198-201. (Web Link)

[3] Oturan, M.A., Peiroten, J., Chartrin, P. and Acher, A.J., 2000. Complete destruction of p-nitrophenol in aqueous medium by electro-Fenton method. Environmental Science & Technology, 34(16), pp.3474-3479. (Web Link)

[4] Compartmentalization-induced phosphorescent emission enhancement and triplet energy transfer in aqueous medium
Zijian Li, Yifei Han & Feng Wang
Nature Communicationsvolume 10, Article number: 3735 (2019) (Web Link)

[5] Premalatha, R. P., Parameswari, E., Malarvizhi, P., Avudainayagam, S. and Davamani, V. (2018) “Sequestration of Hexavalent Chromium from Aqueous Medium Using Biochar Prepared from Water Hyacinth Biomass”, Chemical Science International Journal, 22(3), pp. 1-15. doi: 10.9734/CSJI/2018/40547. (Web Link)

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