The application of 7H-indolo[1,2-a]quinolinium merocyanine as a new water sensor in organic solvents

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 Electronic supplementary materialThe online version of this article (10.1007/s11696-017-0328-z) contains supplementary material, which is available to authorized users.

Synthesis, Solvatochromic Performance, pH Sensing, Dyeing Ability, and Antimicrobial Activity of Novel Hydrazone Dyestuffs

“…After stirring for an extra two hours, the crude product was filtered off under vacuum, washed with distilled water (3 × 5 mL), recrystallized, and air-dried. 13 (2) 2-(3-Cyano-5,5-dimethyl-4-((4-pyridylhydrazono)methyl)furan-2(5H)-ylidene)malononitrile (2). It is prepared from 4aminopyridine (94 mg, 1.0 mmol) and tricyanofuran (200 mg, 1.0 mmol).…”

“…Generally, a solvatochromic material can be defined as a chemical substance able to alter its color in solvents of different polarities due to a variation in its absorption or emission spectra in each solvent. ere is a variety of solvatochromic dyes that have been discovered recently, such as pyridinium, merocyanine, and stilbazolium dyes [9][10][11][12][13][14][15].…”

Chemical Sensors for Water Detection in Organic Solvents and their Applications

“…Receptor 7H‐indoloquinolinium merocyanine ( 14 ) was developed by Sawicka, M. J et al [39] . for the fast and specific water detection in alcohols, DMSO, and DMF.…”

“…The quantitative water determination by fluorescence method was comparable to the standard Karl Fisher method in organic solvents. Receptor 7H-indoloquinolinium merocyanine (14) was developed by Sawicka, M. J et al [39] for the fast and specific water detection in alcohols, DMSO, and DMF. The absorption band blue-shifted upon increasing the water content in the solvent.…”

Assessment of the Composition of Aqueous-Organic Mixtures End Extraction Phases by Solvatochromism of 4-[(Octylylpyridinium)ethenyl]phenolate Dyes

“…The use of optical fibers for the detection provides remote and field-deployable sensing ability [13]. Determinations of the water content have been successfully designed using hydroxynaphthalimide-based merocyanine dye [14], 1,8-nanaphthalimide [15], 8-hydroxyquinolines [16], 2,3-biphenil quinoxaline 6-amine [17], flavone derivatives [18], thioxanthone fluorophores [19] and 7H-indolo[1,2a]quinolinium merocyanine [20]. Recently, chemosensors for water signaling have drawn considerable attention due to certain advantages [4].…”