There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Structure and nanostructure in ionic liquids.

Poly(lactic acid)-Mass production, processing, industrial applications, and end of life.

/pdf/the-present-and-future-of-nanotechnology-in-human-health-fqafmk7ns9.pdf

The present and future of nanotechnology in human health care

The thermal and physicochemical properties of protic ionic liquids (PILs) are reported. It is highly evident that there has been an extensive range of alkylammonium, imidazolium, and heterocyclic cations paired with many organic and inorganic anions that have been employed to prepare PILs. There has been strong interest in modifying the properties of PILs through the addition of water or other molecular solvents. For many applications, the presence of some water in the PILs is not detrimental, and instead leads to enhanced solvent properties such as lower viscosity, higher conductivities, and lower melting points. It remains an issue of definition though of how to refer to these resulting protic solutions. There is also an ongoing difficulty surrounding how to describe the proton activity in the PILs, analogous to pH in aqueous systems. For a broad range of applications, it has been reported that the acidity/basicity of the PIL or PIL-solvent system is crucial for their beneficial properties. It is expected that the fundamental properties of PILs will continue to be explored, along with continued interest in many existing and new applications, such as in electrochemistry, organic and inorganic synthesis, and biological applications. In particular, there has been a significant interest in a broad- range of PILs for use as electrolytes and incorporation in polymer electrolytes for fuel cells, and other energy storage devices.

Protic Ionic Liquids: Evolving Structure–Property Relationships and Expanding Applications

Corrigendum to “Determination of albendazole and ivermectin residues in cattle and poultry-derived samples from India by micellar liquid chromatography” [J. Food Compos. Anal. 103 (2021) 104111]

Different transition metal complexes were synthesized from novel 3-bromo-2-[1-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)ethylidene]hydrazide ligand (H2L) and characterized by spectral techniques. The synthesized ligand was found to act mono as well as di deprotonated (OH, NH) manner and stoichiometry of the ligand to metal ions was confirmed to be 1:1 in case of complex using metal chloride salts, whereas 1:2 in case of metal(II) complexes using metal acetate(II) salt. Structures of metal complexes were confirmed by IR, 1H NMR, TGA, XRD, elemental analysis and UV technique which revealed that Mn(II), Co(II), Ni(II), Cu(II) complexes were octahedral geometry and those of Cu(II), Zn(II) showed square planner and tetrahedral geometry around metal ion respectively. Furthermore H2L and its metal complexes were screened for antimicrobial activity which showed that ligand enhanced its biological activity after coordination with metal ions. In particular, Cd(II) and Mn(II) complexes exhibited excellent antifungal activity.

/pdf/synthesis-characterization-and-antimicrobial-screening-of-4ic3p65bw9.pdf

Synthesis, Characterization and Antimicrobial Screening of Novel Hydrazide Ligand & It’s Transition Metal Complexes

Sulfated tin oxide is found to be an efficient catalyst for the one-pot three-component reaction of aromatic aldehydes, aromatic ketones and urea to give the title compounds (IV) in good yields, in general.

Diastereoselective One-Pot Synthesis of Pyrimidopyrimidines Using Sulfated Tin Oxide as a Reusable Catalyst: An Extension of Biginelli-Type Reaction.

Micron Particles of AIN/Al: Efficient, Novel and Reusable Heterogeneous Catalyst for the Synthesis of Bis(indolyl)methanes.



Heterocycles are the largest family of organic compounds due to their wide applications as therapeutic agents, synthetic intermediates, scaffolds, building blocks or fine chemicals. Heterocyclic compounds are continuously used in material science, biotechnology, pharmaceutical and agrochemical industries. In the past few years, the use of transition metal complexes especially palladium as a heterogeneous catalyst has become a trend for the synthesis of various organic compounds. Pd-catalyzed reactions have proven to be effective ways for synthesising a variety of heterocyclic compounds, which are a popular class of molecules in chemical study. Hence, in this review we have discussed the palladium catalyzed synthesis of various heterocyclic compounds i,e. furan, indole, quinoline, coumarin and some other heterocycle derivatives.


Rajendra P. Pawar

Papers

Corrigendum to “Determination of albendazole and ivermectin residues in cattle and poultry-derived samples from India by micellar liquid chromatography” [J. Food Compos. Anal. 103 (2021) 104111]

Synthesis, Characterization and Antimicrobial Screening of Novel Hydrazide Ligand & It’s Transition Metal Complexes

Diastereoselective One-Pot Synthesis of Pyrimidopyrimidines Using Sulfated Tin Oxide as a Reusable Catalyst: An Extension of Biginelli-Type Reaction.

Micron Particles of AIN/Al: Efficient, Novel and Reusable Heterogeneous Catalyst for the Synthesis of Bis(indolyl)methanes.

An Overview of Palladium-Catalyzed Fabrication of Some Heterocyclic Frameworks