Issue 24, 2020

Intercalation chemistry and thermal characteristics of layered double hydroxides possessing organic phosphonates and sulfonates

Abstract

Intercalation of 2-hydroxyethanesulfonate (2-heS) and 3-hydroxy-1-propanesulfonate (3-hpS) into layered Mg–Al double hydroxides (Mg–Al LDHs) allows delamination of layers in water and enables the synthesis of high-surface-area oxides through non-oxidative thermal decomposition. To investigate the roles of anionic heads and hydroxyl tails in these organic sulfonates, 2-hydroxyethanephosphonate (2-heP) and 1,3-propanedisulfonate (1,3-pDS) were tested as analogs of hydroxyalkylsulfonates, and the thermal characteristics of the resultant LDHs were investigated. Exchange of interlayer CO32− with 2-heP proceeds similarly to 2-heS, causing the same degree of interlayer expansion. However, the resultant LDH resists swelling and delamination in water, demonstrating the distinct property enabled by the –SO3 group. Although LDH possessing 1,3-pDS intercalants seems to resist delamination because of the lack of hydroxyl groups, its thermal characteristics resemble those of its 3-hpS counterpart, demonstrating the crucial role of alkyl sulfonate groups to allow the formation of enhanced microporous structures through non-oxidative thermal treatments. Our results show further that even a partial exchange of CO32− by 3-hpS, corresponding to 0.05 equivalents relative to the exchangeable Al sites, triggers unique thermal characteristics observed for LDH-sulfonates.

Graphical abstract: Intercalation chemistry and thermal characteristics of layered double hydroxides possessing organic phosphonates and sulfonates

Supplementary files

Article information

Article type
Paper
Submitted
29 dez 2019
Accepted
03 mar 2020
First published
04 mar 2020

New J. Chem., 2020,44, 10002-10010

Intercalation chemistry and thermal characteristics of layered double hydroxides possessing organic phosphonates and sulfonates

I. Ogino, Y. Hirayama and S. R. Mukai, New J. Chem., 2020, 44, 10002 DOI: 10.1039/C9NJ06441A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements