Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 321, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2020.128474
Keywords
Gold electrodes; Self-assembling monolayer; Dipicolylamine-zinc(II) complexes; Electrochemical phosphate sensing; Water
Funding
- National Science Centre, Poland [2016/21/B/ST4/03834]
- Deutsche Forschungsgemeinschaft [KU-925/10-1]
- India-Polish Inter-Governmental Science and Technology Cooperation Programme 2016-2018
Ask authors/readers for more resources
Dipicolylamine-zinc(II) complexes immobilized on gold electrodes allowed the selective electrochemical phosphate detection. The electrodes were prepared by assembling monolayers containing either (R)-N-(6-(bis(pyridine-2-ylmethyl)amino)hexyl)-5-(1,2-dithiolan-3-yl)pentanamide (DPA-hexyl) or (R)-N-(12-(bis(pyridine-2-ylmethyl)amino)dodecyl)-5-(1,2-dithiolan-3-yl)pentanamide (DPA-dodecyl) together with 4-mercapto-1-butanol (MB) on gold surfaces and subsequently adding zinc(II)nitrate to produce the corresponding surface-bound zinc (II) complexes. Both sensing systems displayed high sensitivity towards phosphate with detection limits close to 1.0 x 10(-15) M. Sensing was moreover very selective since sulfate, having a similar tetrahedral structure like phosphate, generated only a negligible electrochemical response. These electrodes were shown to allow the quantification of phosphate ions in lake water sample. Electrochemical studies indicated that the sensing mechanism was based on the redox activity of the pyridine units in the ligands complexed with Zn(II).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available