A new pincer-type 'naked-eye' colorimetric probe for Cu2+ determination in 80% water media and its application as a solid state sensor and an efficient antibacterial product

Autor: Ali Moaddeli, Khadijeh Asghari, Hossein Tavallali, Gohar Deilamy-Rad
Rok vydání: 2017
Předmět:
Zdroj: Sensors and Actuators B: Chemical. 244:1121-1128
ISSN: 0925-4005
DOI: 10.1016/j.snb.2016.11.114
Popis: A novel pincer-type colorimetric chemosensor L for detection of Cu2+ was designed and synthesized. Chemosensor L was characterized by FT-IR, 1HNMR, 13CNMR spectroscopy. Receptor L showed high selectivity and sensitivity toward Cu2+ over other metal ions. Cu2+ was detected by changing color from colorless to light green in H2O/DMSO (4:1, v/v), could be distinguished by bare eyes. The limit of detection for Cu2+ was calculated to be 0.043 μmol L−1. The stoichiometric ratio and the association constant (Kass) of the CuL complex was obtained to be (1:1) and 1.24 μmol−1L respectively. Importantly probe L could be used as a solid state (paper and TLC test strips) colorimetric indicator for selective detection of Cu2+ by satisfactory detection ability. Furthermore, the CuL complex was synthesized and characterized by FT-IR spectroscopy and cyclic voltammetry method. The CuL complex showed antibacterial effect against both plant and human. The minimum inhibitory concentration (MIC) of CuL against four plant pathogens was examined to be 0.1, 0.1, 0.1 and 50 ppm and the MIC against one human pathogen was investigated to be 250 ppm. Proposed chmosensor could be applied successfully for determination of some real water samples and one nutrient fertilizer.
Databáze: OpenAIRE
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