8(E)-4-[{2-(2,4-dinitrophenyl)hydrazono}benzene-1,3-diol] as a solvatochromic Schiff base and chromogenic signaling of water content by its deprotonated form in acetonitrile

Tiwari, Karishma; Mishra, Mansi; Singh, Vinod P.

doi:10.1039/c4ra03249g

Cited by 14 publications

(7 citation statements)

References 33 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2-HPEAPB showed low selectivity in DMF, DMSO, methanol, and H 2 O (see Fig. 45 Upon the addition of CN À to 2-HPEAPB solution, the absorbance intensity at 378 nm weakened and a new peak at 528 nm appeared, while other anions showed a minimal change in UV-Vis spectra (Fig. 2).…”

Section: Selectivity Of 2-hpeapbmentioning

confidence: 97%

“…The addition of trace water probably disrupted the formation of deprotonated 2-HPEAPB in acetonitrile upon the addition of F À , AcO À , H 2 PO 4 À , and HSO 4 À . 45 Upon the addition of CN À to 2-HPEAPB solution, the absorbance intensity at 378 nm weakened and a new peak at 528 nm appeared, while other anions showed a minimal change in UV-Vis spectra (Fig. 3a).…”

Section: Selectivity Of 2-hpeapbmentioning

confidence: 98%

See 1 more Smart Citation

Colorimetric test paper for cyanide ion determination in real-time

Jin

Chen

et al. 2015

Anal. Methods

View full text Add to dashboard Cite

A colorimetric cyanide ion (CN À ) sensor 4-[(1E)-2-(2-hydroxyphenyl)ethenyl]-1-allylpyridinium bromide (2-HPEAPB) was synthesized via condensation and N-alkylation reactions using 4-methylpyridine and salicylaldehyde as the starting materials. 2-HPEAPB displayed good selectivity, fast response, and high sensitivity toward CN À over other competing anions in acetonitrile-water (95 : 5, v/v) with a limit of detection of 8.0 Â 10 À6 mol L À1 by the naked eye. The sensing mechanism and the influence of pH and temperature on sensing properties were investigated. Colorimetric test paper for CN À was prepared by absorption of 2-HPEAPB to a chromatography paper, which could be used to detect CN À directly and quickly. Analytical application of measuring CN À concentration in an electroplating wastewater in realtime was conducted successfully.

show abstract

Section: Selectivity Of 2-hpeapbmentioning

confidence: 97%

Section: Selectivity Of 2-hpeapbmentioning

confidence: 98%

Colorimetric test paper for cyanide ion determination in real-time

Jin

Chen

et al. 2015

Anal. Methods

View full text Add to dashboard Cite

show abstract

“…Dinitrophenyl based Schiff base compound containing diol 42 was synthesized by Tiwari et al. [68] The presence of excess acetate ion causes deprotonation of À NH and À OH group of 42. The deprotonated 42 was re-protonated with a trace amount of water.…”

Section: Deprotonation and Protonation Based Probesmentioning

confidence: 99%

Chemical Sensors for Water Detection in Organic Solvents and their Applications

Kumar

Ghosh

2021

ChemistrySelect

View full text Add to dashboard Cite

Moisture or trace water detection at a very low level in organic solvents and other chemical reagents has great significance in the chemical and industrial process. At present, reports on chemical sensors for moisture are still in the early development phase and need continuous improvements. Recently, several approaches have been proposed for the easier detection of water content in the organic solvents. In this review article, we have summarized recent reports on chemical sensors used to detect water in organic solvents. The discussion is focused on optical methods, including fluorescent and colorimetric probes exploring solvatochromism, displacement of ligand or metal and water-induced protonation. Besides, water detection in organic solvents by NMR spectroscopy is also discussed. Probe structure, sensitivity with organic solvents, spectroscopy detection limits, and possible application in various other research areas, including ink-less writing, sweat pore mapping, food products and engineering materials are described in detail.

show abstract

“…have reported detection limits of the anthracene‐based hydrazone‐acetate system for determination of the water content in acetonitrile and tetrahydrofuran as 0.037 and 0.071 %, respectively . Previously, we have also developed a chromogenic system for the detection of water content in acetontrile (LOD=0.012 %) based on protonation and deprotonation . Recently, Kumar et al .…”

Section: Resultsmentioning

confidence: 99%

The Colorimetric Signaling of Water Content by a Deprotonated Schiff Base in some Aprotic Organic Solvents

et al. 2020

Self Cite

View full text Add to dashboard Cite

A simple Schiff base, (E)-2-[1-{2-(2,4-dinitrophenyl)hydrazono} ethyl]phenol (Hdph) and its deprotonated form, (E)-1-(2,4dinitrophenyl)-2-{1-(2-hydroxyphenyl)ethylidene} hydrazine-1ide (dph) have been synthesized and characterized by various physicochemical and spectroscopic techniques. Their structures have also been determined by single-crystal X-ray crystallography. The dph has been utilized as a colorimetric probe for the signaling of water content in some water-miscible aprotic organic solvents (acetonitrile and tetrahydrofuran). The dph reveals a pronounced colorimetric behavior in response to the variation of water content in these solvents. Significant changes in UV-visible absorption spectra permit a ratiometric analysis of the signaling behavior. The spectral changes are pronounced for the water content of less than 10 %, which is suitable for the application of dph as a receptor for the determination of water content in binary aqueous organic solvents having lower water content. The limit of detection (LOD) for water content in acetonitrile and tetrahydrofuran is calculated as 0.20 % and 0.28 %, respectively.

show abstract

8(E)-4-[{2-(2,4-dinitrophenyl)hydrazono}benzene-1,3-diol] as a solvatochromic Schiff base and chromogenic signaling of water content by its deprotonated form in acetonitrile

Cited by 14 publications

References 33 publications

Colorimetric test paper for cyanide ion determination in real-time

Colorimetric test paper for cyanide ion determination in real-time

Chemical Sensors for Water Detection in Organic Solvents and their Applications

The Colorimetric Signaling of Water Content by a Deprotonated Schiff Base in some Aprotic Organic Solvents

Contact Info

Product

Resources

About