The application of 7H-indolo[1,2-a]quinolinium merocyanine as a new water sensor in organic solvents.
CHEMICAL PAPERS 2018;
72:741-752. [PMID:
29568153 PMCID:
PMC5846992 DOI:
10.1007/s11696-017-0328-z]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 10/23/2017] [Indexed: 11/30/2022]
Abstract
Abstract
The 7H-indolo[1,2-a]quinolinium merocyanine was applied as a new water sensor in organic solvents such as ethanol, propane-1-ol, propane-2-ol, DMSO, and DMF. The spectral changes of the dye caused by the addition of increasing amount of water into an organic solvent were investigated. Based on the results, the calibration curves were found as a relation between the position of the absorption band of the dye and the water concentration ranging from about 0.05 to 11% (w/w). In case of ethanol, propane-1-ol and propane-2-ol the plots were linear, whereas in DMSO and DMF, better results were obtained with the use of a polynomial function. The method allowed to determine the water content in a fast and precise manner.
Graphical Abstract
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Electronic supplementary material
The online version of this article (10.1007/s11696-017-0328-z) contains supplementary material, which is available to authorized users.
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