Why is Choline Arginate the Best Performing Bio-IL for Biomass Pretreatment?

DOI

The ionic liquid choline arginate [Ch][Arg] is more effective for coal pretreatment than other choline based amino acid ILs, but the underlying mechanism is unclear. Calculations to show that for gas phase R-OH•••[Arg][Ch], [Arg] adopts a closed (ring) conformation.The cation charge group associates closely with the anion charge centre, and the ring structure places the cation charge group is in close proximity to the hydrogen bond formed by the HBD and anion guanidine sp2 nitrogen. This leads to polarisation of the H-bond: the charge on partial negative atoms becomes more negative, and the partial positive charge of the proton increases, leading to strong H-bonds. In this work we will determine whether this gas phase conformation is present in pure liquid phase [Arg][Ch], in the presence of a model coal/biomass H-bond donor (guaiacol), and the effect of added water.

Identifier
DOI https://doi.org/10.5286/ISIS.E.90681855
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/90681855
Provenance
Creator Dr Silvia Imberti; Professor Greg Warr; Professor Rob Atkin; Ms Haihui Joy Jiang; Dr Shurui Miao; Mr Manuel Brunner
Publisher ISIS Neutron and Muon Source
Publication Year 2021
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Chemistry; Natural Sciences
Temporal Coverage Begin 2018-06-05T08:00:00Z
Temporal Coverage End 2018-06-18T08:40:45Z