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Inorganics
Special Issues
Colorimetric and Fluorescent Chemosensors for Metal Ions
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Colorimetric and Fluorescent Chemosensors for Metal Ions

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Inorganic Materials".

Deadline for manuscript submissions: closed (20 July 2023) | Viewed by 9182

Special Issue Editors

Dr. Mireille Vonlanthen

E-Mail Website
Guest Editor
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México City CP 04510, Mexico
Interests: chemosensors; fluorescence; dendrimers; energy transfer
Dr. Fabián Cuétara-Guadarrama

E-Mail Website
Guest Editor
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México City CP 04510, Mexico
Interests: fluorescence; energy transfer; supramolecular chemistry; DFT calculations
Prof. Dr. Ernesto Rivera

E-Mail Website
Guest Editor
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México City CP 04510, Mexico
Interests: fluorescence; dendrimers; pi-conjugated polymers; energy transfer

Special Issue Information

Dear Colleagues,

Colorimetric as well as fluorescent chemosensors are powerful tools for the detection of trace amounts of metal ions by simple optical methods. For this purpose, chemosensors that are capable of signal transduction need to be developed. Chemosensors for metal ions are built from an ionophore and a chromophore linked together by a spacer. The key features in the development of chemosensors are the reversible and selective binding of the targeted metal ion to the ionophore and the switch between two different states in the optical properties of the chromophore. The advantages of colorimetric and fluorescent chemosensors are high sensitivity and selectivity, quick response time, naked-eye visualization and versatility. The targeting of metal ions is of great interest for medicinal, biological, as well as environmental remediation applications. This Special Issue, named “Colorimetric and fluorescent chemosensors for metal ions”, will include cutting-edge research and review articles in this emerging and fascinating field. Authors from interdisciplinary backgrounds are encouraged to contribute to this Special Issue.

Dr. Mireille Vonlanthen
Dr. Fabián Cuétara-Guadarrama
Prof. Dr. Ernesto Rivera
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. Inorganics 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

  • chemosensor
  • metal ions
  • fluorescence
  • colorimetric sensors

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Published Papers (4 papers)

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Research

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16 pages, 5275 KiB  
Article
The Analytical Application of Quenching Phenomena of CdTe Quantum Dot Nanoparticles
by Petra Humajová, Patrik Baliak, Ivan Landry Yumdjo Youmbissi, Alžběta Jebavá, Lenka Řezáčová and Přemysl Lubal
Inorganics 2023, 11(9), 373; https://doi.org/10.3390/inorganics11090373 - 19 Sep 2023
Cited by 2 | Viewed by 1441
Abstract
This paper is devoted to the synthesis and application of CdTe quantum dot (QD) nanoparticles covered with organic ligands containing a thiol group, mostly mercaptopropionic acid (MPA) and glutathione (GSH). The simple one-step synthetic procedure was optimized to prepare greater quantities of nanoparticles [...] Read more.
This paper is devoted to the synthesis and application of CdTe quantum dot (QD) nanoparticles covered with organic ligands containing a thiol group, mostly mercaptopropionic acid (MPA) and glutathione (GSH). The simple one-step synthetic procedure was optimized to prepare greater quantities of nanoparticles for analytical purposes. The prepared CdTe QD nanoparticles were characterized by various analytical techniques, and their interaction with some metal ions (Cu(II), Pb(II), and Hg(II)) was studied by using luminescence spectroscopy in both steady-state and time-resolved modes. The mathematical analysis of the quenching effect of Cu(II) ions on the luminescence of CdTe QD nanoparticles shows that the static contribution is mostly responsible for the overall effect, but experimental conditions, such as pH, ionic strength, or the concentration of nanoparticles in aqueous solution, could also be important. The presence of metal ions in the form of a metal complex species could play an important role, and this phenomenon could be used to tune the selectivity of the quenching process. These findings have been utilized for the development of an analytical procedure for the detection and quantitative analysis of Cu(II) and Pb(II) ions in environmental water samples. In practice, this procedure could be easily implemented in a microplate format to increase throughput. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Chemosensors for Metal Ions)
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14 pages, 3322 KiB  
Article
Yellow-Green and Blue Fluorescent 1,8-Naphthalimide-Based Chemosensors for Metal Cations
by Ivo Grabchev, Silvia Angelova and Desislava Staneva
Inorganics 2023, 11(2), 47; https://doi.org/10.3390/inorganics11020047 - 17 Jan 2023
Cited by 1 | Viewed by 1729
Abstract
Two new 1,8-naphthalimides (NI), emitting yellow-green or blue fluorescence depending on the type of substituents at the C-4 position, have been synthesized and characterized. Their basic photophysical characteristics have been investigated in organic solvents of different polarities. Their ability to detect metal ions [...] Read more.
Two new 1,8-naphthalimides (NI), emitting yellow-green or blue fluorescence depending on the type of substituents at the C-4 position, have been synthesized and characterized. Their basic photophysical characteristics have been investigated in organic solvents of different polarities. Their ability to detect metal ions (Ag+, Cu2+, Zn2+ Ca2+, Mg2+, Ni2+, and Fe3+) has been studied in DMF solution. The amino (NI1) and alkoxy (NI2) functionalized 1,8-naphthalimides exhibit different optical and metal ion sensing properties attributable to the nature of the C-4 substituents. In addition, theoretical calculations based on the affordable but effective density functional theory (DFT) and time-dependent DFT (TDDFT) methods were performed in order to investigate the geometric and electronic structure of the title NI compounds. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Chemosensors for Metal Ions)
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12 pages, 1897 KiB  
Article
Two-Photon Fluorescence in Red and Violet Conjugated Polymer Microspheres
by Yanyan Zhi, Ziwei Feng, Tanisha Mehreen, Xiaoyuan Liu, Kirsty Gardner, Xiangping Li, Bai-Ou Guan, Lijuan Zhang, Sergey I. Vagin, Bernhard Rieger and Alkiviathes Meldrum
Inorganics 2022, 10(7), 101; https://doi.org/10.3390/inorganics10070101 - 12 Jul 2022
Cited by 4 | Viewed by 2578
Abstract
We investigate the two-photon fluorescence (TPF) of conjugated polymer (CP) microspheres with diameters up to tens of micrometers. Two polymers, emitting in either the violet or red, were first synthesized and characterized in terms of their one-photon fluorescence and three-dimensional internal microstructure. Under [...] Read more.
We investigate the two-photon fluorescence (TPF) of conjugated polymer (CP) microspheres with diameters up to tens of micrometers. Two polymers, emitting in either the violet or red, were first synthesized and characterized in terms of their one-photon fluorescence and three-dimensional internal microstructure. Under femtosecond infrared excitation, both types of microspheres showed a strong TPF, which was investigated by the excitation intensity dependence, emission spectroscopy, time-resolved luminescence, and photobleaching dynamics. While the violet-fluorescent microspheres performed similarly compared to dye-doped polystyrene counterparts emitting at a similar wavelength, the red-fluorescent microspheres showed a two-orders-of-magnitude stronger TPF. This excellent performance is attributed to enhanced hyperpolarizability associated with intermolecular interactions in the polymer solid, indicating a route toward designed CP microspheres that could outperform currently-available microparticles for sensing or imaging applications involving two-photon fluorescence. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Chemosensors for Metal Ions)
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Review

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18 pages, 8289 KiB  
Review
Rational Design of Fluorescent/Colorimetric Chemosensors for Detecting Transition Metal Ions by Varying Functional Groups
by Jong-Kwon Park, Junhyeop Shin, Seohyeon Jang, Myeong-Lok Seol, Jihyeon Kang, Seyoung Choi, Hojong Eom, Ohhyun Kwon, Soomin Park, Dong-Youn Noh and Inho Nam
Inorganics 2022, 10(11), 189; https://doi.org/10.3390/inorganics10110189 - 29 Oct 2022
Cited by 7 | Viewed by 2286
Abstract
In recent decades, concerns about increasing biological and environmental contamination have necessitated the development of chemosensors with high selectivity, sensitivity, and cost-effectiveness. In principle, the sensing performance can be affected by the functional group(s) of receptor, the charge of the metal ion(s), and [...] Read more.
In recent decades, concerns about increasing biological and environmental contamination have necessitated the development of chemosensors with high selectivity, sensitivity, and cost-effectiveness. In principle, the sensing performance can be affected by the functional group(s) of receptor, the charge of the metal ion(s), and the electron configuration of the sensing molecule(s)e and metal ion(s). Fine controlling of the substituents can influence the electron density of the receptor to enhance the binding affinity to metal ions, which is an effective way to improve the photophysical properties of the sensors. This review explores the effect of functional group modification on the performance of various chemosensors represented by Pt(dithiolene)-based complexes (2012–2021). Then, recently developed Schiff base chemosensors (2014–2021) are discussed. The Schiff base is a good platform for controlling electron configuration due to a facile synthesis of various organic structures (aldehyde or ketone groups with primary amine derivatives). The discussion focuses on the detection type, physicochemical and optical properties, and applications of these chemosensors. Full article
(This article belongs to the Special Issue Colorimetric and Fluorescent Chemosensors for Metal Ions)
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