The enhancement of chain rigidity and gas transport performance of polymers of intrinsic microporosity via intramolecular locking of the spiro-carbon.
Here, we present a new strategy to improve the rigidity of through the introduction of 8-membered ring locking into the flexible spiro-carbon pivot point to produce an interlocked polycyclic structure. This locked version of shows simultaneous increases in both permeability and selectivity that place it well above the Robeson upper bound for a number of important gas pairs. Molecular modelling demonstrates that the locked version of is much more rigid.
School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand. j.jin@auckland.ac.nz.
Jian
J
Zhang
School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand. j.jin@auckland.ac.nz.
Hong
H
Kang
School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand. j.jin@auckland.ac.nz.
Jacob
J
Martin
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
Shouhai
S
Zhang
Membrane Technology and Research, Inc., 39630 Eureka Dr, Newark, CA 94560, USA.
Sylvie
S
Thomas
Membrane Technology and Research, Inc., 39630 Eureka Dr, Newark, CA 94560, USA.
Tim C
TC
Merkel
School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand. j.jin@auckland.ac.nz.
Jianyong
J
Jin