Header

UZH-Logo

Maintenance Infos

Solvent-Controlled Morphology of Catalytic Monolayers at Solid–Liquid Interfaces


Kraack, Jan Philip; Hamm, Peter (2018). Solvent-Controlled Morphology of Catalytic Monolayers at Solid–Liquid Interfaces. Journal of Physical Chemistry C, 122(4):2259-2267.

Abstract

Ultrafast vibrational dynamics of monolayers from a rhenium carbonyl complex at solid−liquid interfaces is investigated with the help of 2D ATR IR spectroscopy in dependence of the solvation environment. By changing the solvent from methanol to acetonitrile, we observe a structural transition between two states and find that this transition is fully reversible. The two coexisting states are identified by distinct but closely spaced (∼15 cm−1) vibrational bands in the region of the A′(1) symmetric carbonyl stretch vibration. Surface-dilution experiments suggest that the newly formed state in acetonitrile is related to aggregation of molecules at the surface. The vibrational energy transfer rate between the two species (∼30 ps) is used as a structural measure, based on which the morphology is characterized as partially ordered dimers in an otherwise disordered but closely packed monolayer.

Abstract

Ultrafast vibrational dynamics of monolayers from a rhenium carbonyl complex at solid−liquid interfaces is investigated with the help of 2D ATR IR spectroscopy in dependence of the solvation environment. By changing the solvent from methanol to acetonitrile, we observe a structural transition between two states and find that this transition is fully reversible. The two coexisting states are identified by distinct but closely spaced (∼15 cm−1) vibrational bands in the region of the A′(1) symmetric carbonyl stretch vibration. Surface-dilution experiments suggest that the newly formed state in acetonitrile is related to aggregation of molecules at the surface. The vibrational energy transfer rate between the two species (∼30 ps) is used as a structural measure, based on which the morphology is characterized as partially ordered dimers in an otherwise disordered but closely packed monolayer.

Statistics

Citations

Dimensions.ai Metrics
1 citation in Web of Science®
1 citation in Scopus®
1 citation in Microsoft Academic
Google Scholar™

Altmetrics

Downloads

1 download since deposited on 09 Mar 2018
1 download since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:9 January 2018
Deposited On:09 Mar 2018 14:29
Last Modified:23 Sep 2018 06:15
Publisher:American Chemical Society (ACS)
ISSN:1932-7447
Funders:Swiss National Science Foundation, URRP LightChEC of the University of Zurich
Additional Information:This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.jpcc.7b12421.
OA Status:Closed
Publisher DOI:https://doi.org/10.1021/acs.jpcc.7b12421
Project Information:
  • : FunderSNSF
  • : Grant ID
  • : Project TitleSwiss National Science Foundation
  • : Funder
  • : Grant ID
  • : Project TitleURRP LightChEC of the University of Zurich

Download

Content: Accepted Version
Filetype: PDF - Registered users only until 9 January 2019
Size: 473kB
View at publisher
Embargo till: 2019-01-09