Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.0
3.7
Journals
Chemosensors
Special Issues
Colorimetric and Fluorescent Sensors: Current Status and Future Development
share announcement

Colorimetric and Fluorescent Sensors: Current Status and Future Development

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Optical Chemical Sensors".

Deadline for manuscript submissions: 15 April 2025 | Viewed by 4293

Special Issue Editors

Dr. Kien Wen Sun

E-Mail
Guest Editor
Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
Interests: nanolithography and nanoimprint; organic/inorganic heterojunction solar cells; nanoscale thermal transport; perovskites; chemosensors
Special Issues, Collections and Topics in MDPI journals
Dr. Shellaiah Muthaiah

E-Mail Website
Guest Editor
Department of Research and Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai 600077, India
Interests: nanomaterial synthesis; chemosensors; organic probes; perovskites; biosensors; real-time water analysis; theranostics applications

Special Issue Information

Dear Colleagues,

The detection of important and harmful metal ions and anions has become essential to maintaining clean and safe ecosystems. Numerous analytical techniques, including surface plasmon resonance (SPR) investigations, organic-probe-based fluorescent/colorimetric sensors, nanomaterial-based colorimetric/fluorometric/immunoassays , metal–organic framework (MOFs)-facilitated quantification, dye-molecule-driven colorimetric recognition studies, and composite-structure-mediated ion detection, have been proposed and demonstrated with real-time applications. Comparing these analytical methods, the colorimetric and fluorometric approaches are exceptional due to their unique applications, such as paper strips, in vitro/in vivo bioimaging, and real-time  water analysis. Moreover, advanced and easily synthesizable organic colorimetric probes and fluorophores with specific ion binding sites have been demonstrated by researchers. More recently, reports on easily operable nanomaterial-based colorimetric and fluorometric sensors under sustainable environments have also attracted much attention. For example, silver and gold nanoparticle (Ag NP and Au NP)-driven colorimetric sensors and carbon dots (CDs), graphene quantum dots (GQDs), MOFs, metal halide perovskites (HPs), and composite-based fluorescent sensors are becoming the focus of environmental research with real-time applications. The aim of this Special Issue is to collect and publish these innovative colorimetric and fluorometric sensors, analytical techniques, and studies that could drive future developments in related research fields.

Dr. Kien Wen Sun
Dr. Shellaiah Muthaiah
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Chemosensors is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • colorimetric sensors
  • fluorescent detection
  • metal ion detection
  • anion recognition
  • metal–organic frameworks (MOFs)

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review

14 pages, 7267 KiB  
Article
Fluorescent Carbon Dots with Red Emission: A Selective Sensor for Fe(III) Ion Detection
by Ángela Fernández-Merino, Miriam Chávez, Guadalupe Sánchez-Obrero, Rafael Madueño, Manuel Blázquez, Rafael Del Caño and Teresa Pineda
Chemosensors 2024, 12(11), 226; https://doi.org/10.3390/chemosensors12110226 - 30 Oct 2024
Viewed by 792
Abstract
We present a procedure for the synthesis and purification of p-phenylenediamine-based carbon dots that can be used for the recognition of Fe(III) ions. Carbon dots have an approximately spherical shape with an average size of 10 nm and are composed of a carbonaceous [...] Read more.
We present a procedure for the synthesis and purification of p-phenylenediamine-based carbon dots that can be used for the recognition of Fe(III) ions. Carbon dots have an approximately spherical shape with an average size of 10 nm and are composed of a carbonaceous core surrounded by functional groups attached to it, both of which are responsible for their dual fluorescence properties. The emission bands have a different behavior, with a blue band dependent and a red emission independent of the excitation wavelength, respectively. Red emission is appropriate for the detection of ions and other molecules in biological environments because this high wavelength prevents the occurrence of processes such as resonance energy transfer and internal filter effects. In particular, the presence of Fe(III) ions produces an important quenching phenomenon that can be applied to the fabrication of a sensor. The platform is very sensitive, with a detection limit of 0.85 µM, which is within the lowest values reported for this ion, and a high selectivity that is believed to be due to the formation of a specific complex in the ground state through specific interactions of Fe (III) ions with pyridinic and amino groups on the surface of the nanomaterials. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Sensors: Current Status and Future Development)
►▼ Show Figures

Figure 1

18 pages, 1828 KiB  
Article
Tailoring Ruthenium(II) and Rhenium(I) Complexes for Turn-On Luminescent Sensing of Antimony(III)
by Alexandre Vieira Silva, Fabricio Ragone, Gustavo Teodosio Ruiz and Guillermo Orellana
Chemosensors 2024, 12(10), 217; https://doi.org/10.3390/chemosensors12100217 - 18 Oct 2024
Viewed by 739
Abstract
Antimony (Sb) is currently a widespread element with key roles in telecommunication, sustainable energy, and military industries, among others. Its significant toxicity determines the need to realize sensors for water, air, and soil and the industrial process monitoring of Sb species. Unfortunately, no [...] Read more.
Antimony (Sb) is currently a widespread element with key roles in telecommunication, sustainable energy, and military industries, among others. Its significant toxicity determines the need to realize sensors for water, air, and soil and the industrial process monitoring of Sb species. Unfortunately, no antimony sensors exist so far, and just laboratory analysis methods are in use. We aimed to contribute to the development of optical sensors for the metalloid by tailoring, for the first time, luminescent Ru(II) and Re(I) polypyridyl complexes to probe and quantify the presence of Sb(III). The molecular design of the complexes includes the multifunctional Sb-binding 2-(2,2′-bithien-5-yl)-1H-imidazo[4,5-f]-1,10-phenanthroline (btip) ligand that ensures the molecular binding of Sb(III) in organic media. The Ru(II)-btip complex is additionally endowed with one 2,2′-bipyrazine (bpz) or two 1,4,5,8-tetraazaphenanthrene (tap) ligands, namely [Ru(bpz)(btip)2]2+ and [Ru(tap)2(btip)]2+, that boost the excited state oxidation potential of the probe, leading to an intramolecular photoinduced electron transfer from btip to the Ru(II) core. The latter is suppressed upon interaction with Sb(III), leading to an 11-fold increase in both the luminescence intensity and lifetime of [Ru(bpz)(btip)2]2+ in the presence of ca. 50 μmol L−1 of SbCl3 in organic medium. The fluorescence intensity of [Re(CO)3(H2O)(btip)]+ also increases upon interaction with Sb(III) but to a much lesser extent due to the intraligand π*→π nature of its emission compared to the Ru(II) ligand-to-metal excited state deactivation. However, the weak π*→d emission band in the red spectral region of the former is quenched by the semimetallic element. The sensing mechanisms of the Ru(II)- and Re(I)-btip probes that allow luminescence intensity (Ru, Re), ratiometric (Ru), and lifetime measurements (Ru) are compared and discussed in this initial solution sensing study. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Sensors: Current Status and Future Development)
►▼ Show Figures

Graphical abstract

19 pages, 10177 KiB  
Article
A “Turn-Off” Pyrene-Based Ligand as a Fluorescent Sensor for the Detection of Cu2+ and Fe2+ Ions: Synthesis and Application in Real Water Samples, Logic Gate Construction, and Bio-Imaging
by Bhavana G. Gowda, Muzaffar Iqbal and Shiva Prasad Kollur
Chemosensors 2024, 12(6), 91; https://doi.org/10.3390/chemosensors12060091 - 30 May 2024
Cited by 3 | Viewed by 875
Abstract
Herein, we report the synthesis and characterization of a novel Schiff base ligand, (Z)-5-((pyren-1-ylmethylene)amino)-2,4-dihydro-3H-pyrazol-3-one (PMDP). The characterization of ligand PMDP was carried out using ESI-MS, 1H NMR, and UV–Visible spectroscopic techniques. As a probe, PMDP displayed a detectable, colorimetric colour [...] Read more.
Herein, we report the synthesis and characterization of a novel Schiff base ligand, (Z)-5-((pyren-1-ylmethylene)amino)-2,4-dihydro-3H-pyrazol-3-one (PMDP). The characterization of ligand PMDP was carried out using ESI-MS, 1H NMR, and UV–Visible spectroscopic techniques. As a probe, PMDP displayed a detectable, colorimetric colour shift in the presence of Cu2+ and Fe2+ ions. The solution was seen to have a light brown colour and to exhibit a fluorometric “turn off” response when Cu2+ and Fe2+ ions were present in a DMSO solution (HEPES 0.01 M, pH = 7.4) at room temperature. Job’s plot revealed that the PMDP binding ratio to Cu2+ and Fe2+ ions was in 1:2 ratio. In contrast to the other metal ions (Cd2+, Mn2+, Co2+, Na+, Ni2+, Cu+, Fe3+, Hg2+, Mg2+, Zn2+, K+, and V5+), the synthesised probe showed exceptional sensitivity and selectivity for detecting Cu2+ and Fe2+ metal ions. The results indicate that the detection limits for Cu2+ and Fe2+ are 0.42 μM and 0.51 μM, respectively. Furthermore, PMDP was efficiently utilised for the quantitative analysis of Cu2+ and Fe2+ in real water samples, RGB colour values in smart phones, logic gate construction, and cell imaging in HeLa cells. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Sensors: Current Status and Future Development)
►▼ Show Figures

Figure 1

Review

Jump to: Research

25 pages, 6056 KiB  
Review
Recent Development of Electrospun Nanostructured Fibers as Colorimetric Probes for Metal Ion Sensing: A Review
by Mohanraj Jagannathan, Ravi Kumar Yohan and Sungbo Cho
Chemosensors 2024, 12(7), 129; https://doi.org/10.3390/chemosensors12070129 - 5 Jul 2024
Viewed by 1125
Abstract
The colorimetric detection of metal ions has witnessed a surge in advancements, with nanostructured fibers emerging as a powerful platform for environmental monitoring and remediation applications. These fibers offer several advantages, including a high surface area, enhanced sensitivity and selectivity, non-intrusive analysis, rapid [...] Read more.
The colorimetric detection of metal ions has witnessed a surge in advancements, with nanostructured fibers emerging as a powerful platform for environmental monitoring and remediation applications. These fibers offer several advantages, including a high surface area, enhanced sensitivity and selectivity, non-intrusive analysis, rapid response times, robustness under harsh conditions, and user-friendly handling. This unique combination makes them particularly suitable for visible eye detection of metal ions in remote or challenging environments. This review provides a concise overview of recent developments in nanostructured fibers, and their cutting-edge fabrication methods, for the colorimetric-based detection of various heavy metal ions in real-time samples. By exploiting the unique properties of these fibers, colorimetric detection offers a promising and cost-effective approach for heavy metal ion determination. This review delves into the design principles, functionalization strategies, and detection mechanisms employed in these innovative sensors. We highlight the potential of nanostructured fibers as a well-established and efficient platform for the colorimetric detection of heavy metals, paving the way for more sustainable and accessible environmental monitoring solutions. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Sensors: Current Status and Future Development)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Pyrene Derivatives for Hg2+ and Explosives Detection
Authors: Muthaiah Shellaiah1; Kien Wen Sun2*
Affiliation: 1 Department of Research and Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai 600077, India 2 Department of Applied Chemistry, National Yang-Ming Chiao Tung University, Hsinchu 300, Taiwan;
Abstract: Mercury and explosives are well-known hazards that affect our environment and threatening to living society. Mercury mostly exists as inorganic mercuric (Hg2+) salts which can be accurately detected via highly sensitive fluorometric responses. Likewise, detecting and quantifying majority of explosives containing nitrogen dioxide (-NO2) functional units has been demonstrated in numerous reports. Among the available literatures, pyrene derivatives based fluorometric detection of Hg2+ and explosives has attracted much concern for their environmental and biological applicability. In the presence of Hg2+, pyrene derivatives tend to form excimers, which are able to exhibit “turn-on” or “turn-off’ fluorescence responses via the chelation-enhanced fluorescence (CHEF), photo-induced electron transfer (PET), or Fluorescence resonance energy transfer (FRET), etc. On the other hand, π-π stacking of emissive pyrene-derivatives leading to J- or H-type aggregation via self-excimers (Py-Py*) can be quenched/enhanced by explosive hazards. In fact, -NO2-containing explosives interacting with pyrene derivatives can lead to considerable quenching or enhancement in fluorescence intensity. This review provides in depth discussions on the pyrene derivatives towards the sensing of Hg2+ and explosives with demonstrated applications. Moreover, the synthesis, sensory mechanism, advantages, limitations, and future scope of reported pyrene derivatives in Hg2+ and explosives sensors are presented to the readers. KEYWORDS: Hg2+ detection, Aggregation-induced emission (AIE), Turn-on, Fluorescence quenching, Nitro-explosives sensors, Real-time applications, Bioimaging, H-bonding, Excimers, Hazard quantification.

Back to TopTop