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Focused on Organic Luminescent Materials and Molecular Recognition

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (15 January 2019) | Viewed by 3834

Special Issue Editor

Special Issue Information

Dear Colleagues,

In recent years, the development of chemical sensors that can recognize and sense environmentally- and biologically-important species has emerged as a significant target in the field. In the past decade, anions have played important roles in a wide range of chemical and biological processes; they have become a target of investigation, aimed at sensor development due to their drawbacks in excessive amount. Thus, there have been many methods developed to assess the levels of ions in drinking water and wastes from the refinement process. The design of functionalized organic luminescent receptors that serve as selective chemosensors has gained great interest regardless of the difficulties associated with the similarities of the anions and/or biological molecules. Nevertheless, organic luminescent materials make an ideal candidate for promising applications in biological analytes and environmental monitoring due to their optical and luminescent properties make them easy to detect ions. This Special Issue focused on organic luminescent materials and molecular recognition which illustrating the suitability of newly developed sensors for fluorescent analysis applications, as well as describing novel molecular recognition in solving real life analytical problems.

Prof. Dr. Sheshanath V. Bhosale
Guest Editor

Manuscript Submission Information

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Keywords

  • Chemosensors
  • Organic probes
  • Sensors
  • Ions
  • Molecular recognition
  • Biological molecules
  • Water purification
  • Hybrid luminescent materials
  • Metal complexes

Published Papers (1 paper)

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Research

10 pages, 2734 KiB  
Article
Proton Triggered Colorimetric and Fluorescence Response of a Novel Quinoxaline Compromising a Donor-Acceptor System
by Yogesh W. More, Sachin D. Padghan, Rajesh S. Bhosale, Rajendra P. Pawar, Avinash L. Puyad, Sidhanath V. Bhosale and Sheshanath V. Bhosale
Sensors 2018, 18(10), 3433; https://doi.org/10.3390/s18103433 - 12 Oct 2018
Cited by 16 | Viewed by 3345
Abstract
Quinoxaline-based novel acid-responsive probe Q1 was designed on the basis of a conjugated donor-acceptor (D-A) subunit. Q1 shows colorimetric and fluorometric changes through protonation and deprotonation in dichloromethane. With the addition of the trifluoroacetic acid (TFA), UV-vis absorption spectral changes in peak intensity [...] Read more.
Quinoxaline-based novel acid-responsive probe Q1 was designed on the basis of a conjugated donor-acceptor (D-A) subunit. Q1 shows colorimetric and fluorometric changes through protonation and deprotonation in dichloromethane. With the addition of the trifluoroacetic acid (TFA), UV-vis absorption spectral changes in peak intensity of Q1 was observed. Moreover, the appearance of a new peaks at 284 nm 434 nm in absorption spectra with the addition of TFA indicating protonation of quinoxaline nitrogen and form Q1.H+ and Q1.2H+. The emission spectra display appearance of new emission peak at 515 nm. The optical property variations were supported by time resolved fluorescence studies. The energy band gap was calculated by employing cyclic voltammetry and density functional calculations. Upon addition of triethylamine (TEA) the fluorescence emission spectral changes of Q1 are found to be reversible. Q1 shows color changes from blue to green in basic and acidic medium, respectively. The paper strip test was developed for making Q1 a colorimetric and fluorometric indicator. Full article
(This article belongs to the Special Issue Focused on Organic Luminescent Materials and Molecular Recognition)
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