eCite Digital Repository

Beads-based system for optical sensing using spiropyran photoswitches


Scarmagnani, S and Walsh, Z and Alhashimy, N and Radu, A and Paull, B and Macka, M and Diamond, D, Beads-based system for optical sensing using spiropyran photoswitches, Engineering in Medicine and Biology Society, 2007 (EMBS 2007) , 22-26 August 2007, Lyon, France, pp. 4096 - 4097. ISBN 978-1-4244-0787-3 (2007) [Conference Extract]

Pending copyright assessment - Request a copy

DOI: doi:10.1109/IEMBS.2007.4353236


In science, control of interactions at the molecular scale is the ultimate goal, as this in turn determines all macroscale behaviour. Using molecular-switches based on spiropyran-like molecules, it is possible to produce surfaces whose physico- chemical properties can be controlled under external photonic stimulation [1]. It has been demonstrated that low-power light sources such as UV and green LEDs can switch spiropyran-modified surfaces between an inactive spiro (SP) form and an active merocyanine (MC) form which is highly coloured, and possesses a phenolate binding site for metal guest species such as Cu2+ [2], Co2+ [1]. Similarly, aminoacids interact with the MC form through complementary zwitterionic charges [3]. The amino acid and metal ion 'guests' can be subsequently expelled using a green LED to reform the original inactive SP [4]. These processes have been observed in liquid phase experiments, but recently, in order to generate smart adaptive surfaces based on spiropyran photochromic moieties, we have covalently bound spiropyran derivatives to the surface of polystirene microspheres.

Item Details

Item Type:Conference Extract
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Paull, B (Professor Brett Paull)
UTAS Author:Macka, M (Professor Mirek Macka)
ID Code:71642
Year Published:2007
Web of Science® Times Cited:3
Deposited By:Research Division
Deposited On:2011-07-26
Last Modified:2011-08-18

Repository Staff Only: item control page