N7-(carboxymethyl)guanine-Lithium Crystalline Complex: A Bioinspired Solid Electrolyte.
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) Ω(-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.
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560012 (Karnataka), India.
Dipak
D
Dutta
Department of Chemistry, Indian Institute of Technology, Kanpur, Kanpur-208016 (UP), India.
N
N
Nagapradeep
Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC3216, Australia.
Haijin
H
Zhu
Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC3216, Australia.
Maria
M
Forsyth
Department of Chemistry, Indian Institute of Technology, Kanpur, Kanpur-208016 (UP), India.|Centre for Nanosciences, Indian Institute of Technology, Kanpur, Kanpur-208016 (UP), India.|Centre for Environmental Science and Technology, Indian Institute of Technology, Kanpur, Kanpur-208016 (UP), India.
Sandeep
S
Verma
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560012 (Karnataka), India.
Aninda J
AJ
Bhattacharyya
D004553:Electric Conductivity; D004573:Electrolytes / Q000138:chemical synthesis / Q000737:chemistry*; D006147:Guanine / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000737:chemistry*; D007473:Ion Channels / Q000737:chemistry; D017136:Ion Transport; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D004573:Electrolytes; D007473:Ion Channels; D007477:Ions; D014867:Water; D006147:Guanine; D008094:Lithium