Deakin University
Browse

File(s) not publicly available

Exploiting stable radical states for multifunctional properties in triarylamine-based porous organic polymers

journal contribution
posted on 2014-08-21, 00:00 authored by Carol Hua, A Rawal, T B Faust, P D Southon, R Babarao, J M Hook, D M D'Alessandro
Redox-active porous organic polymers (POPs) have enormous potential in applications ranging from electrocatalysis to solar energy conversion. Exploiting the different electronic states offers exciting prospects for controlling host-guest chemistry, however, this aspect of multifunctionality has to date, remained largely unexplored. Here, we present a strategy for the development of multifunctional materials with industrially sought-after properties. A series of hydrophobic POPs containing redox-active triarylamines linked by ethynyl (POP-1), 1,4-diethynylphenyl (POP-2) and 4,4′- diethynylbiphenyl (POP-3) bridges have been synthesised and characterised by NMR and EPR spectroscopy, as well as spectroelectrochemistry and computational modelling. The facile electrochemical or chemical oxidation of the POPs generate mixed-valence radical cation states with markedly enhanced adsorption properties relative to their neutral analogues, including a 3-fold improvement in the H2 uptake at 77 K and 1 bar, and an increase in the isosteric heat of adsorption for CO2. This journal is © the Partner Organisations 2014.

History

Journal

Journal of Materials Chemistry A

Volume

2

Issue

31

Pagination

12466 - 12474

ISSN

2050-7488

eISSN

2050-7496

Publication classification

C1.1 Refereed article in a scholarly journal