N7-(carboxymethyl)guanine-Lithium Crystalline Complex: A Bioinspired Solid Electrolyte.

ABSTRACT: Electrochemical device with components having direct significance to biological life processes is a potent futuristic strategy for the realization of all-round green and sustainable development. We present here synthesis design, structural analysis and ion transport of a novel solid organic electrolyte (G7Li), a compound reminiscent of ion channels, derived from regioisomeric N7-guanine-carboxylate conjugate and Li-ions. G7Li, with it's in-built supply of Li(+)-ions, exhibited remarkably high lithium-ion transference number (=?0.75) and tunable room temperature ionic conductivity spanning three decades (?10(-7) to 10(-3)??(-1)?cm(-1)) as a function of moisture content. The ionic conductivity show a distinct reversible transition around 80-100?°C, from a dual Li(+) and H(+) (<100?°C) to a pure Li(+) conductor (>100?°C). Systematic studies reveal a transition from water-assisted Li-ion transport to Li hopping-like mechanism involving guanine-Li coordination. While as-synthesized G7Li has potential in humidity sensors, the anhydrous G7Li is attractive for rechargeable batteries.

SUBMITTER: Dutta D 

PROVIDER: S-EPMC4835778 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature