Noria and its derivatives as hosts for chemically and thermally robust Type II Porous Liquids

ALEXANDER, F. M. ; FONROUGE, SERGIO; BORIONI, J. L.; DEL PÓPOLO, MARIO G.; HORTON, P. N.; COLES, S. J ; HUTCHINGS, B. P. ; CRAWFORD, D. E. ; JAMES, STUART

Chemical Science

Royal Society of Chemistry

Año: 2021

orous Liquids (PLs) are a new class of material that possess both fluidity and permanent porosity. As such they can act as enhanced, selective solvents and may ultimately find applications which are not possible for porous solids, such as continuous flow separation processes. Type II PLs consist of empty molecular hosts dissolved in size-excluded solvents and to date have mainly been based on hosts that have limited chemical and thermal stability. Here we identify Noria, a rigid cyclic oligomer as a new host for the synthesis of more robust type II PLs. Although the structure of Noria is well documented, we find that literature has overlooked the true composition of bulk Noria samples. We find that bulk samples typically consist of Noria (ca. 40%), a Noria isomer, specifically a resorcinarene trimer, ?R3? (ca. 30%) and other unidentified oligomers (ca. 30%). Noria has been characterised crystallographically as a diethyl ether solvate and its 1 H NMR spectrum fully assigned for the fir