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Title: Branched isomeric 1,2,3-triazolium-based ionic liquids: new insight into structure–property relationships

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/C5CP04756K· OSTI ID:1386959
 [1];  [2];  [1];  [1];  [3];  [1];  [3];  [4];  [5];  [1];  [1];  [1];  [5]; ORCiD logo [6]
  1. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
  2. Materials Science Division; Lawrence Berkeley National Laboratory; Berkeley; USA
  3. Univ. of Pittsburgh, PA (United States)
  4. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); Liquid Ion Solutions, LLC, Pittsburgh, PA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); Liquid Ion Solutions, LLC, Pittsburgh, PA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)

A series of four isomeric 1,2,3-triazolium-based ionic liquids (ILs) with vary degree of branching were synthesized and characterized to investigate the effect of ion branching on thermal and physical properties of the resulting IL. Here, it was found that increased branching led to a higher ionicity and higher viscosity. The thermal properties were also altered significantly and spectral changes in the near edge X-ray absorption fine structure (NEXAFS) spectra show that branching affects intermolecular interaction. While the ionicity and viscosity varying linearly with branching, the MDSC and NEXAFS measurements show that the cation shape has a stronger influence on the melting temperature and absorptive properties than the number of branched alkyl substituents.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
SC0001015; FE0004000; AC02-05CH11231
OSTI ID:
1386959
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Vol. 17, Issue 44; Related Information: CGS partners with University of California, Berkeley; University of California, Davis; Lawrence Berkeley National Laboratory; University of Minnesota; National Energy Technology Laboratory; Texas A&M University; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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Development of ethanolamine-based ionic liquid membranes for efficient CO 2 /CH 4 separation journal July 2017
Multi-Gram Scale Synthesis of 1,2,3-Triazolium Ionic Liquids and Assay of Their Resistance towards Bases: Multi-Gram Scale Synthesis of 1,2,3-Triazolium Ionic Liquids and Assay of Their Resistance towards Bases journal August 2018
Effects of substituent branching and chirality on the physical properties of ionic liquids based on cationic ruthenium sandwich complexes journal January 2016
Ionic liquid syntheses via click chemistry: expeditious routes toward versatile functional materials journal January 2018
Recent Advances on Triazolium Ionic Liquids: Synthesis and Applications journal August 2019
Ion Transport Properties and Ionicity of 1,3-Dimethyl-1,2,3-Triazolium Salts with Fluorinated Anions journal September 2018