The sole aim of the present article was to develop a highly efficient electrochemical double-layer capacitor (EDLC) using a solid polymer electrolyte. Solution cast technique was adopted to fabricate an efficient EDLC. Solid biopolymer electrolytes were synthesized based on corn starch as a host polymer and sodium chloride as well as ionic liquid (1-hexyl-3-methylimidazolium iodide) as dopants. The ionic conductivity of present system has been carried out using impedance spectroscopy. Detailed electrical, structural and thermal studies of polymer electrolytes have been carried out. An efficient EDLC has been fabricated using carbon-based electrodes and maximum conducting biopolymer electrolyte which shows promising result.

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The manganese(II) complex [Mn(SiNSi)Cl2] (SiNSi = 2,6-[EtNSi(NtBu)2CPh]2C5H3N) was an efficient catalyst for the chemoselective C(sp)-H borylation of terminal alkynes. Aliphatic as well as aromatic alkynes containing electron-withdrawing and -donating substituents in different positions have been efficiently borylated. In all cases, the cata-lyst showed an excellent chemoselectivity towards C-H borylation and the reactions proceeded without additives or in-situ activators. Paramagnetic Mn complexes are involved in catalytic turnover which is proposed to occur by a re-dox-neutral Mn(II) cycle. Stoichiometric reactions support that the [Mn(SiNSi)Cl2] precatalyst enters the catalytic cycle by reaction with HBPin. KIE experiments point toward C-H activation of the alkyne as not being involved in the rate-determining step.