Krishnamurthi Muralidharan

We have used conjugated microporous polymers (CMPs) as bifunctional catalyst for HER/OER/OWSR.

This review examines the fire-retardant properties of compositions that incorporate various classes of phosphorus–nitrogen compounds. Specifically, it focuses on nitrogen-containing derivatives of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, phosphinates, phosphorus–nitrogen salts, and aryloxycyclophosphazenes. The findings indicate that these classes of fire retardants enhance the limiting oxygen index, decrease heat and smoke emission indices in epoxy compositions, and facilitate the creation of self-extinguishing materials. Notably, aryloxycyclophosphazenes with reactive functional groups emerge as the most effective fire retardants, particularly in terms of their impact on the mechanical properties of epoxy compositions and compatibility with epoxy resin. This review would be a valuable resource for engineers, chemical engineers, materials scientists, and researchers engaged in the development of non-combustible polymer composites and organoelement compounds.

Hydrogen energy as a solution to meet energy demands has highlighted the need for efficient and cost-effective electrocatalysts for hydrogen production through water electrolysis.

Addressing the pressing need to develop affordable and efficient catalysts is essential.

Generally, inorganic nano/microparticles produced by chemical routes are covered by organic surfactants or polymers to control their agglomeration during their synthesis. However, these surfactants and polymers negatively affect their catalytic activity because these molecules mask the surface. This work presents the synthesis of surfactant-free CuInS₂ and CuInSe₂ (sf-CuInS₂ and sf-CuInSe₂) nano/microparticles through simple reactions without surfactant or polymer coatings using LiBH₄ under a thermodynamically favourable condition. These reactions are rare observations of a single-step process to produce ternary metal chalcogenides without any template assistance. We have also demonstrated efficient catalysis by sf-CuInS₂ nanoparticles in the coupling reaction of substituted phenylacetylenes. We tested it as catalysts in dimerizing 1,3-diyne derivatives while using 8-diazabicyclo[5.4.0]undec-7-ene (DBU) as the base. These Glassar–Hay coupling reactions are conducted at room temperature in acetonitrile (4–7 h, depending on the substrate) using 10 mg of sf-CuInS₂. The maximum yield obtained in these reactions is 97%, while the catalyst is reusable for five cycles with little difference in its ability to catalyse. The effectiveness of the catalyst is credited to the availability of a free catalytic surface.

An innovative approach that uses the dual functional capping agent 1-aminohexanol to stabilize aluminium nanoparticles (Nano-Al) produced via the colloidal synthesis process is reported.