National Chemical Laboratory

About: National Chemical Laboratory is a facility organization based out in Pune, Maharashtra, India. It is known for research contribution in the topics: Catalysis & Enantioselective synthesis. The organization has 8891 authors who have published 14837 publications receiving 387600 citations.

Regioselective protection and deprotection of inositol hydroxyl groups.

Abstract: An attempt is made to survey and categorize selective protection and deprotection reactions, so that practicing chemists/biologists may be able to choose a method for the preparation of protected inositol derivatives, depending on their requirement. In addition to being useful for those who work with inositols, it is hoped that this review will help to widen the scope of using cyclitol derivatives for the synthesis of various classes of natural and unnatural compounds with interesting properties. Emphasis is given to the literature published between 1985 and the end of the year 2002, involving selective protection/deprotection of inositol hydroxyl groups.

Formation of a Room Temperature Stable Fe V (O) Complex: Reactivity Toward Unactivated C−H Bonds

Abstract: An Fe(V)(O) complex has been synthesized from equimolar solutions of (Et4N)2[Fe(III)(Cl)(biuret-amide)] and mCPBA in CH3CN at room temperature. The Fe(V)(O) complex has been characterized by UV-vis, EPR, Mossbauer, and HRMS and shown to be capable of oxidizing a series of alkanes having C-H bond dissociation energies ranging from 99.3 kcal mol(-1) (cyclohexane) to 84.5 kcal mol(-1) (cumene). Linearity in the Bell-Evans-Polayni graph and the finding of a large kinetic isotope effect suggest that hydrogen abstraction is engaged the rate-determining step.

Yogurt: a novel precursor for heavily nitrogen doped supercapacitor carbon

Abstract: Yogurt is used as a novel precursor to synthesize high quality heavily nitrogen doped porous carbon for supercapacitor applications. It is an easily scalable and manufactureable food item containing casein as the major protein, in addition to some whey proteins. The yogurt forming process is mediated by bacteria, and thus this precursor has a high nitrogen content that can get doped into carbon upon controlled precursor pyrolysis. Indeed our material retains a high (12 wt%) nitrogen percentage even after high temperature pyrolysis in the presence of an activating agent. A surface area of 1300 m2 g−1 is attained with a good density of mesopores, apart from abundant micropores. The material offers a high capacitance of 225 F g−1 at 2 A g−1, which decreases only to 200 F g−1 even at a high current density of 20 A g−1 in an aqueous electrolyte. An energy density of 7 W h kg−1 is delivered at a power density of 5000 W kg−1. We have also examined the cathode performance of our material vs. nickel cobalt sulfide (NCS) in an asymmetric configuration. The energy density in an asymmetric assembly goes as high as 27 W h kg−1 at a power density of 364 W kg−1 and 17.8 W h kg−1 at a power density of 6400 W kg−1.

Synthesis and Biodegradability of Polyaspartic Acid: A Critical Review

Abstract: Poly(aspartic acid) (PAA) being biodegradable is suitable for various industrial medical and agricultural applications to replace many non‐biodegradable polymers in use Poly(aspartic acid) can be synthesized by different methods with and without catalyst in different forms such as polysuccinimide, either hydrolyzed to acid or salt The polymer of (aspartic acid) is present in different forms such as α,β and L, D isomers The conformational analysis of poly(aspartic acid) was done by various analytical methods Different combinations of these two isomer present in different percentage can be detected by various methods such as Hoffman degradation, IR, and NMR spectroscopic analysis From the standard test for biodegradability, it was shown that the polymer is fully biodegradable In this review, synthesis and characterization of homo and copolymer derivatives of PAA, along with the application and biodegradability in comparison with the other polymer in use, is discussed briefly