Glass formation of a DMSO – water mixture probed with a photosynthetic pigment
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 b...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/142117 |
| _version_ | 1811691535075377152 |
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| author | Huerta-Viga, Adriana Nguyen, Linh-Lan Amirjalayer, Saeed Sim, Jamie Hung Ni Zhang, Zhengyang Tan, Howe-Siang |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Huerta-Viga, Adriana Nguyen, Linh-Lan Amirjalayer, Saeed Sim, Jamie Hung Ni Zhang, Zhengyang Tan, Howe-Siang |
| author_sort | Huerta-Viga, Adriana |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T06:21:26Z |
| format | Journal Article |
| id | ntu-10356/142117 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:21:26Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1421172020-06-16T03:13:05Z Glass formation of a DMSO – water mixture probed with a photosynthetic pigment Huerta-Viga, Adriana Nguyen, Linh-Lan Amirjalayer, Saeed Sim, Jamie Hung Ni Zhang, Zhengyang Tan, Howe-Siang School of Physical and Mathematical Sciences Science::Chemistry Photosynthetic Pigment Glass Formation 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. MOE (Min. of Education, S’pore) 2020-06-16T03:13:04Z 2020-06-16T03:13:04Z 2018 Journal Article Huerta-Viga, A., Nguyen, L.-L., Amirjalayer, S., Sim, J. H. N., Zhang, Z., & Tan, H.-S. (2018). Glass formation of a DMSO – water mixture probed with a photosynthetic pigment. Physical Chemistry Chemical Physics, 20(26), 17552-17556. doi:10.1039/c8cp03058h 1463-9076 https://hdl.handle.net/10356/142117 10.1039/c8cp03058h 29915826 2-s2.0-85049625047 26 20 17552 17556 en Physical Chemistry Chemical Physics © 2018 the Owner Societies (Published by Royal Society of Chemistry). All rights reserved. |
| spellingShingle | Science::Chemistry Photosynthetic Pigment Glass Formation Huerta-Viga, Adriana Nguyen, Linh-Lan Amirjalayer, Saeed Sim, Jamie Hung Ni Zhang, Zhengyang Tan, Howe-Siang Glass formation of a DMSO – water mixture probed with a photosynthetic pigment |
| title | Glass formation of a DMSO – water mixture probed with a photosynthetic pigment |
| title_full | Glass formation of a DMSO – water mixture probed with a photosynthetic pigment |
| title_fullStr | Glass formation of a DMSO – water mixture probed with a photosynthetic pigment |
| title_full_unstemmed | Glass formation of a DMSO – water mixture probed with a photosynthetic pigment |
| title_short | Glass formation of a DMSO – water mixture probed with a photosynthetic pigment |
| title_sort | glass formation of a dmso water mixture probed with a photosynthetic pigment |
| topic | Science::Chemistry Photosynthetic Pigment Glass Formation |
| url | https://hdl.handle.net/10356/142117 |
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