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https://hdl.handle.net/2440/111112
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dc.contributor.author | Heng, S. | - |
dc.contributor.author | Mak, A. | - |
dc.contributor.author | Kostecki, R. | - |
dc.contributor.author | Zhang, X. | - |
dc.contributor.author | Pei, J. | - |
dc.contributor.author | Stubing, D. | - |
dc.contributor.author | Ebendorff-Heidepriem, H. | - |
dc.contributor.author | Abell, A. | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Sensors and Actuators B: Chemical: international journal devoted to research and development of physical and chemical transducers, 2017; 252:965-972 | - |
dc.identifier.issn | 0925-4005 | - |
dc.identifier.issn | 0925-4005 | - |
dc.identifier.uri | http://hdl.handle.net/2440/111112 | - |
dc.description.abstract | Calcium is a ubiquitous intracellular signaling ion that plays a critical role in the modulation of fundamental cellular processes. A detailed study of these processes requires selective and reversible sensing of Ca2+ and an ability to quantify and monitor concentration changes in a biological setting. Three new, rationally designed, synthesized and photoswitchable spiropyran-based reversible sensors for Ca2+ are reported. Sensor 1a is highly selective for Ca2+ with an improved profile relative to the other two analogues, 1b and 1c. Formation of the merocyanine–Ca2+ complex is proportional to an increase in Ca2+ released from HEK293 cells on stimulation with ionomycin. The photophysical processes surrounding the binding of Ca2+ to compound 1a were further explored using computational methods based on density functional theory (DFT). The ability of sensor 1a to bind Ca2+ and photoswitch reversibly was also characterized using silica suspended-core microstructured optical fiber (SCF). These SCF experiments (with 100 nM Ca2+) represent a first step toward developing photoswitchable, minimally invasive and highly sensitive Ca2+ sensing platforms for use in a biological setting. | - |
dc.description.statementofresponsibility | Sabrina Heng, Adrian M. Mak, Roman Kostecki, Xiaozhou Zhang Jinxin Pei, Daniel B.Stubing, Heike Ebendorff-Heidepriem, Andrew D.Abell | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | - |
dc.rights | © 2017 Elsevier B.V. All rights reserved. | - |
dc.source.uri | http://dx.doi.org/10.1016/j.snb.2017.06.051 | - |
dc.subject | Spiropyran; calcium sensing; density functional theory; suspended-core microstructured optical fiber | - |
dc.title | Photoswitchable calcium sensor: ‘On’–‘Off’ sensing in cells or with microstructured optical fibers | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.snb.2017.06.051 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/CE140100003 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Kostecki, R. [0000-0001-5822-8401] | - |
dc.identifier.orcid | Pei, J. [0000-0003-2453-929X] | - |
dc.identifier.orcid | Ebendorff-Heidepriem, H. [0000-0002-4877-7770] | - |
dc.identifier.orcid | Abell, A. [0000-0002-0604-2629] | - |
Appears in Collections: | Aurora harvest 3 IPAS publications |
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