Next Article in Journal
Proximity and Contact Sensing with Instrumented Compliant Wrist for Close Guidance of Robotic Manipulators
Previous Article in Journal
Consensus-Based Cooperative Control Approach Applied to Urban Traffic Networks
Article Menu
Issue 2 (ECSA-3 2016) cover image

Article Versions

Export Article

Open AccessProceedings
Proceedings 2017, 1(2), 30; doi:10.3390/ecsa-3-B001

Heterocyclic Dicyanovinyl Derivatives: Synthesis and Evaluation of the Chemosensory Ability in Aqueous Solution

Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
Presented at the 3rd International Electronic Conference on Sensors and Applications, 15–30 November 2016; Available online: https://sciforum.net/conference/ecsa-3.
*
Author to whom correspondence should be addressed.
Published: 14 November 2016
Download PDF [1873 KB, uploaded 7 July 2017]

Abstract

Two novel dicyanovinyl derivatives 3ab were synthesized in moderate to good yields through a Knoevenagel reaction of the corresponding aldehyde precursors and malononitrile. The photophysical properties of the new push-pull systems were studied by UV-vis and fluorescence spectroscopy in acetonitrile. The evaluation of the compounds as colorimetric chemosensors was carried out by performing spectrophotometric titrations in acetonitrile and acetonitrile/water in the presence of relevant organic and inorganic anions, and of alkaline, alkaline-earth and transition metal cations. The benzoindole derivative exhibited great selectivity for the cyanide anion over other anions in acetonitrile/water (8:2) solution showing a distinct color change from colorless to yellow.
Keywords: Knoevenagel reaction; benzofuran; benzoindole; push-pull dicyanovinyl heterocyclic compounds; colorimetric sensors; aqueous media Knoevenagel reaction; benzofuran; benzoindole; push-pull dicyanovinyl heterocyclic compounds; colorimetric sensors; aqueous media
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Ferreira, R.C.M.; Costa, S.P.G.; Raposo, M.M.M. Heterocyclic Dicyanovinyl Derivatives: Synthesis and Evaluation of the Chemosensory Ability in Aqueous Solution. Proceedings 2017, 1, 30.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Proceedings EISSN 2504-3900 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top