Anion sensing with cobalt corrinoid grafted quartz crystal microbalances

•QCMs with cobalt corrinoid complexes are investigated as liquid sensors for anions.•Sensors have high sensitivity, selectivity for cyanide with 1μM detection limits.•Responses reach equilibrium in less than 3s and are fully reversible.•The results show that QCMs are an excellent platform for anion...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2015-02, Vol.207, p.297-302
Main Authors: Erbahar, Dilek D., Gürol, Ilke, Zelder, Felix, Harbeck, Mika
Format: Article
Language:English
Subjects:
Anion detection
Anions
Chemical liquid sensor
Chemical sensors
Cobalt
Cobalt corrinoid
Cyanide
Cyanides
Detection
Grafting
Microbalances
Quartz crystal microbalance
Sensors
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Summary:•QCMs with cobalt corrinoid complexes are investigated as liquid sensors for anions.•Sensors have high sensitivity, selectivity for cyanide with 1μM detection limits.•Responses reach equilibrium in less than 3s and are fully reversible.•The results show that QCMs are an excellent platform for anion detection in water. Corrin macrocycles are well known for their interesting and multifaceted coordination chemistry at the axial positions of the cobalt center. In this work, the use of such cobalt corrinoids as sensitive elements for sorption based chemical sensors like the quartz crystal microbalance (QCM) is described for the first time. This approach of fast and reversible ion detection extends the versatility and applicability of this class of metal-containing ionophores and colorimetric indicators. QCMs were grafted with aquacyano and dicyano cobalt corrinoids and assessed in their sensing characteristics during exposure to cyanide, thiocyanate, and other ionic species as well as selected organic compounds. The liquid sensing characteristics of the corronoids were found to be excellent. Sensors reach equilibrium in
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2014.10.073