Connecting Structural and Transport Properties of Ionic Liquids with Cationic Oligoether Chains

Lall-Ramnarine, Sharon I.; Zhao, Man; Rodriguez, Chanele; Fernandez, Rahonel; Zmich, Nicole; Fernandez, Eddie D.; Dhiman, Surajdevprakash B.; Castner, Edward W.; Wishart, James F.

doi:10.1149/2.0371708jes

Title: Connecting Structural and Transport Properties of Ionic Liquids with Cationic Oligoether Chains

Journal Article · Thu Jun 01 00:00:00 EDT 2017 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/2.0371708jes· OSTI ID:1366347

Lall-Ramnarine, Sharon I. ^[1]; Zhao, Man ^[2]; Rodriguez, Chanele ^[1]; Fernandez, Rahonel ^[1]; Zmich, Nicole ^[3]; Fernandez, Eddie D. ^[1]; Dhiman, Surajdevprakash B. ^[4]; Castner, Edward W. ^[2]; Wishart, James F. ^[4]

City Univ. (CUNY) Bayside, NY (United States). Dept. of Chemistry
Rutgers Univ., Piscataway, NJ (United States). Dept. of Chemistry and Chemical Biology
City Univ. (CUNY) Bayside, NY (United States). Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division
Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division

We used X-ray diffraction and molecular dynamics simulations to probe the structures of two families of ionic liquids containing oligoether tails on the cations. Imidazolium and pyrrolidinium bis(trifluoromethylsulfonyl)amide ILs with side chains ranging from 4 to 10 atoms in length, including both linear alkyl and oligo-ethylene oxide tails, were prepared. Furthermore, their physical properties, such as viscosity, conductivity and thermal profile, were measured and compared for systematic trends. Consistent with earlier literature, a single ether substituent substantially decreases the viscosity of pyrrolidinium and imidazolium ILs compared to their alkyl congeners. Remarkably, as the number of ether units in the pyrrolidinium ILs increases there is hardly any increase in the viscosity, in contrast to alkylpyrrolidinium ILs where the viscosity increases steadily with chain length. Viscosities of imidazolium ether ILs increase with chain length but always remain well below their alkyl congeners. To complement the experimentally determined properties, molecular dynamics simulations were run on the two ILs with the longest ether chains. Our results point to specific aspects that could be useful for researchers designing ILs for specific applications.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704; AC02-98CH10886; AC02-06CH11357

OSTI ID:: 1366347

Report Number(s):: BNL-113979-2017-JA; R&D Project: CO-004; KC0301010

Journal Information:: Journal of the Electrochemical Society, Vol. 164, Issue 8; ISSN 0013-4651

Publisher:: The Electrochemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 26 works

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x-ray

Title: Connecting Structural and Transport Properties of Ionic Liquids with Cationic Oligoether Chains

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