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Tracking a photo-switchable surface-localised supramolecular interaction via refractive index

Tracking a photo-switchable surface-localised supramolecular interaction via refractive index
Tracking a photo-switchable surface-localised supramolecular interaction via refractive index
As supramolecular chemistry evolves, from the design of interactions in the solution and the solid state to applications at surfaces, there is a need for the development of analytical techniques capable of directly interrogating surface-localised supramolecular interactions. We present a proof-of-concept integrated optical Bragg grating sensor, capable of evanescently detecting small changes in refractive index at infrared wavelengths within a microfluidic system. The high spectral fidelity of the Bragg gratings combined with precise thermal compensation enables direct monitoring of the surface throughout the experiment, enabling the sensor to probe changes in situ and in real-time during surface preparation and chemical modification, and then to follow the progress of a dynamic surface-localised supramolecular interaction. In this study the sensor is assessed through the investigation of a photo-switchable inclusion complex between an azobenzene-functionalised surface and cyclodextrin in aqueous solution. The ability to investigate supramolecular interactions directly in real-time upon a planar surface via refractive index offers a valuable new tool in the understanding of complex dynamic supramolecular systems.
2050-7526
1178-1185
Parker, R.M.
b052ca4d-b6c7-4fdd-a2f9-45032f0ff13f
Wales, Dominic J.
c001ff27-d3ac-4d2e-859f-9e963fc0374c
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Grossel, Martin C.
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Parker, R.M.
b052ca4d-b6c7-4fdd-a2f9-45032f0ff13f
Wales, Dominic J.
c001ff27-d3ac-4d2e-859f-9e963fc0374c
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Grossel, Martin C.
403bf3ff-6364-44e9-ab46-52d84c6f0d56

Parker, R.M., Wales, Dominic J., Gates, James C., Smith, Peter G.R. and Grossel, Martin C. (2016) Tracking a photo-switchable surface-localised supramolecular interaction via refractive index. Journal of Materials Chemistry C, 2016 (4), 1178-1185. (doi:10.1039/C5TC03774C).

Record type: Article

Abstract

As supramolecular chemistry evolves, from the design of interactions in the solution and the solid state to applications at surfaces, there is a need for the development of analytical techniques capable of directly interrogating surface-localised supramolecular interactions. We present a proof-of-concept integrated optical Bragg grating sensor, capable of evanescently detecting small changes in refractive index at infrared wavelengths within a microfluidic system. The high spectral fidelity of the Bragg gratings combined with precise thermal compensation enables direct monitoring of the surface throughout the experiment, enabling the sensor to probe changes in situ and in real-time during surface preparation and chemical modification, and then to follow the progress of a dynamic surface-localised supramolecular interaction. In this study the sensor is assessed through the investigation of a photo-switchable inclusion complex between an azobenzene-functionalised surface and cyclodextrin in aqueous solution. The ability to investigate supramolecular interactions directly in real-time upon a planar surface via refractive index offers a valuable new tool in the understanding of complex dynamic supramolecular systems.

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More information

Submitted date: 12 November 2015
Accepted/In Press date: 4 January 2016
e-pub ahead of print date: 5 January 2016
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 386198
URI: https://eprints.soton.ac.uk/id/eprint/386198
ISSN: 2050-7526
PURE UUID: a46db9a8-f895-40ee-a38a-6e96c27c6f96
ORCID for James C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for Martin C. Grossel: ORCID iD orcid.org/0000-0001-7469-6854

Catalogue record

Date deposited: 21 Jan 2016 08:58
Last modified: 10 Sep 2019 00:54

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