Issue 26, 2018

Glass formation of a DMSO–water mixture probed with a photosynthetic pigment

Abstract

Despite their extensive industrial usage, glass-forming liquids are not fully understood, and methods to investigate their dynamical heterogeneity are sought after. Here we show how the appearance of a second component in the visible absorption spectrum of a photosynthetic pigment upon cooling can be used to probe the glass transition of a dimethylsulfoxide–water mixture. The changes in the relative ratio of the two components with respect to temperature follow a sigmoid curve, and we show that the second component arises due to protonation of the pigment at low temperatures. Furthermore, from visible transient absorption spectra we show that, unlike the first component, the dynamics of the second component slows down significantly at lower temperatures, suggesting that there are two distinct environments with fast and slow fluctuations. Our results therefore enable a new method to characterize the dynamical heterogeneity of glass-forming liquids.

Graphical abstract: Glass formation of a DMSO–water mixture probed with a photosynthetic pigment

Supplementary files

Article information

Article type
Communication
Submitted
08 mai 2018
Accepted
06 juin 2018
First published
06 juin 2018

Phys. Chem. Chem. Phys., 2018,20, 17552-17556

Glass formation of a DMSO–water mixture probed with a photosynthetic pigment

A. Huerta-Viga, L. Nguyen, S. Amirjalayer, J. H. N. Sim, Z. Zhang and H. Tan, Phys. Chem. Chem. Phys., 2018, 20, 17552 DOI: 10.1039/C8CP03058H

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