Highly selective and sensitive colorimetric chemosensor for detection of Co2+ in a near-perfect aqueous solution. Issue 33 (17th March 2016)

• Record Type: Journal Article
• Authors: Lee, Seong Youl; Lee, Jae Jun; Bok, Kwon Hee; Kim, So Young; Kim, Cheal
• Is Part Of: RSC advances. Volume 6:Issue 33(2016)
• Page Start: 28081
• Page End: 28088
• Publication Date: 2016-03-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra03364d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : An outstanding colorimetric chemosensor was developed to selectively detect Co 2+ with the lowest detection limit through the color change from colorless to yellow. Abstract : A new simple and easy-to-make colorimetric chemosensor1 was designed and synthesized by combination of 4-diethylaminosalicylaldehyde and diethylenetriamine. In a near-perfect aqueous solution, sensor1 showed a selective color change from colorless to yellow in the presence of Co 2+ with a 1 : 1 stoichiometric system. To investigate the sensing mechanism of1 for Co 2+, UV-vis spectroscopy, ESI-mass and theoretical calculations were conducted. The detection limit (0.65 μM) of1 for Co 2+ was comparable to the Federal-State Toxicology and Risk Analysis Committee (FSTRAC) guideline in drinking water (0.68 μM). Practically, 1 functioned as a visible test strip with a silica plate and could be used to quantify Co 2+ in real water samples. Therefore, probe1 could be a good alternative method for on-site and real time screening of Co 2+ .