Jie, Kecheng, Liu, M ORCID: 0000-0003-0008-1480, Zhou, Y, Llittle, MA, Bonakala, Satyanarayana, Chong, SY ORCID: 0000-0002-3095-875X, Stephenson, A, Chen, L, Huang, Feihe and Cooper, AI ORCID: 0000-0003-0201-1021
(2017)
Styrene Purification by Guest-Induced Restructuring of Pillar[6]arene.
Journal of the American Chemical Society, 139 (8).
pp. 2908-2911.
Text
ja-2016-133008.doc - Author Accepted Manuscript Download (5MB) |
Abstract
The separation of styrene (St) and ethylbenzene (EB) mixtures is important in the chemical industry. Traditionally, this is done using energy-intensive vacuum distillation columns. Adsorptive separation is an alternative approach. Here, we explore the St and EB adsorption selectivity of two pillar-shaped macrocyclic pillar[n]arenes (EtP5 and EtP6; n 5 and 6). Both crystalline and amorphous EtP6 can capture St from a St-EB mixture with remarkably high selectivity. We show that EtP6 can be used to separate St from a 50:50 v/v St:EB mixture, yielding in a single adsorption cycle St with a purity of > 99 %. Single crystal structures, powder X-ray diffraction patterns and molecular simulations all suggest that this selectivity is due to a guest-induced structural change in EtP6 rather than a simple cavity/pore size effect. This restructuring means that the material ‘self-heals’ upon each recrystallization, and St separation can be carried out over multiple cycles with no loss of performance.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | mixtures, physical and chemical processes, cavities, adsorption, moelcules |
Depositing User: | Symplectic Admin |
Date Deposited: | 10 Feb 2017 10:57 |
Last Modified: | 19 Jan 2023 07:19 |
DOI: | 10.1021/jacs.6b13300 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3005623 |