Next Article in Journal
Correlation between Chemical Composition and Antifungal Activity of Clausena lansium Essential Oil against Candida spp.
Next Article in Special Issue
Enhancement of Solasodine Extracted from Fruits of Solanum nigrum L. by Microwave-Assisted Aqueous Two-Phase Extraction and Analysis by High-Performance Liquid Chromatography
Previous Article in Journal
Rh(III) Aqueous Speciation with Chloride as a Driver for Its Extraction by Phosphonium Based Ionic Liquids
Article

Screen-printed Microsensors Using Polyoctyl-thiophene (POT) Conducting Polymer As Solid Transducer for Ultratrace Determination of Azides

1
Chemistry Department, Faculty of Science, Ain Shams University, 11566 Abbasia, Cairo, Egypt
2
Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
3
Applied Organic Chemistry Department, National Research Centre, 12622 Dokki, Giza, Egypt
*
Authors to whom correspondence should be addressed.
Academic Editors: Clinio Locatelli and Marcello Locatelli
Received: 8 March 2019 / Revised: 30 March 2019 / Accepted: 2 April 2019 / Published: 9 April 2019
(This article belongs to the Special Issue Analytical Methods for Toxics Determination)
Two novel all-solid-state potentiometric sensors for the determination of azide ion are prepared and described here for the first time. The sensors are based on the use of iron II-phthalocyanine (Fe-PC) neutral carrier complex and nitron-azide ion-pair complex (Nit-N3) as active recognition selective receptors, tetradodecylammonium tetrakis(4-chlorophenyl) borate (ETH 500) as lipophilic cationic additives and poly(octylthiophene) (POT) as the solid contact material on carbon screen-printed devices made from a ceramic substrate. The solid-contact material (POT) is placed on a carbon substrate (2 mm diameter) by drop-casting, followed, after drying, by coating with a plasticized PVC membrane containing the recognition sensing complexes. Over the pH range 6-9, the sensors display fast (< 10 s), linear potentiometric response for 1.0 × 10−2–1.0 × 10−7 M azide with low detection limit of 1.0 × 10−7 and 7.7 × 10−8 M (i.e., 6.2–4.8 ng/ml) for Fe-PC/POT/and Nit-N3/POT based sensors, respectively. The high potential stability and sensitivity of the proposed sensors are confirmed by electrochemical impedance spectroscopy (EIS) and constant-current chronopotentiometry measurement techniques. Strong membrane adhesion and absence of delamination of the membrane, due to possible formation of a water film between the recognition membranes and the electron conductor are also verified. The proposed sensors are successfully applied for azide quantification in synthetic primer mixture samples. Advantages offered by these sensors are the robustness, ease of fabrication, simple operation, stable potential response, high selectivity, good sensitivity and low cost. View Full-Text
Keywords: azides; screen-printed sensors; poly (3-octylthiophene); solid contact potentiometric sensors; iron-phthalocyanine; nitron-azide complexes azides; screen-printed sensors; poly (3-octylthiophene); solid contact potentiometric sensors; iron-phthalocyanine; nitron-azide complexes
Show Figures

Figure 1

MDPI and ACS Style

Galal Eldin, A.; E. Amr, A.E.-G.; H. Kamel, A.; S. M. Hassan, S. Screen-printed Microsensors Using Polyoctyl-thiophene (POT) Conducting Polymer As Solid Transducer for Ultratrace Determination of Azides. Molecules 2019, 24, 1392. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules24071392

AMA Style

Galal Eldin A, E. Amr AE-G, H. Kamel A, S. M. Hassan S. Screen-printed Microsensors Using Polyoctyl-thiophene (POT) Conducting Polymer As Solid Transducer for Ultratrace Determination of Azides. Molecules. 2019; 24(7):1392. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules24071392

Chicago/Turabian Style

Galal Eldin, Ahmed, Abd E.-G. E. Amr, Ayman H. Kamel, and Saad S. M. Hassan. 2019. "Screen-printed Microsensors Using Polyoctyl-thiophene (POT) Conducting Polymer As Solid Transducer for Ultratrace Determination of Azides" Molecules 24, no. 7: 1392. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules24071392

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop