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Recent Advances in Luminescence: From Mechanisms to Applications

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A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Physical Chemistry and Chemical Physics".

Deadline for manuscript submissions: closed (31 May 2024) | Viewed by 3149

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Dr. Pavel Alexandrovich Danilov

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Guest Editor

Lebedev Physical Institute, 119991 Moscow, Russia
Interests: diamonds; photoluminescent micro-marks; color centers; photoluminescence microspectroscopy; nonlinear optics

Special Issue Information

Dear Colleagues,

Luminescence is one of the most interesting physical effects in various fields of science, technology and medicine. Recent advances in related instrumentation and methods, as well as the simplicity of luminescent techniques adapted to a wide variety of applications, has made it very popular in many natural sciences. Luminescent and fluorescent analysis provide some of the most selective and sensitive ways for detecting many molecular compounds, impurities and biological tissues. We are announcing this Special Issue to focus on recent advances in the investigation of luminescence effects and their novel applications.

The scope of this Issue includes bioimaging, phonon-assisted upconversion, luminescent nanothermometry in vivo, analysis of biological tissues, characterization of impurities and color centers in crystals, investigation of intraband and interband transitions, nonlinear effects, quantum dots, and so on.

Dr. Pavel Alexandrovich Danilov
Guest Editor

Manuscript Submission Information

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Keywords

photoluminescence
halide perovskites
bioimaging
phonon-assisted upconversion
fluorescent sensors
photoluminescence microspectroscopy
luminescent nanothermometry
luminescence of biological tissues
color centers
quantum dots

Published Papers (4 papers)

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Research

23 pages, 4881 KiB

Open AccessArticle

Multi-Wavelength Raman Differentiation of Malignant Skin Neoplasms

by Elena Rimskaya, Alexey Gorevoy, Svetlana Shelygina, Elena Perevedentseva, Alina Timurzieva, Irina Saraeva, Nikolay Melnik, Sergey Kudryashov and Aleksandr Kuchmizhak

Int. J. Mol. Sci. 2024, 25(13), 7422; https://doi.org/10.3390/ijms25137422 (registering DOI) - 6 Jul 2024

Viewed by 112

Abstract

Raman microspectroscopy has become an effective method for analyzing the molecular appearance of biomarkers in skin tissue. For the first time, we acquired in vitro Raman spectra of healthy and malignant skin tissues, including basal cell carcinoma (BCC) and squamous cell carcinoma (SCC), [...] Read more.

{cm}^{- 1}

and 2800–3100

{cm}^{- 1}

and analyzed them to find spectral features for differentiation between the three classes of the samples. The intensity ratios of the bands at 1268, 1336, and 1445

{cm}^{- 1}

appeared to be the most reliable criteria for the three-class differentiation at 532 nm excitation, whereas the bands from the higher wavenumber region (2850, 2880, and 2930

{cm}^{- 1}

) were a robust measure of the increased protein/lipid ratio in the tumors at both excitation wavelengths. Selecting ratios of the three bands from the merged (532 + 785) dataset made it possible to increase the accuracy to 87% for the three classes and reach the specificities for BCC + SCC equal to 87% and 81% for the sensitivities of 95% and 99%, respectively. Development of multi-wavelength excitation Raman spectroscopic techniques provides a versatile non-invasive tool for research of the processes in malignant skin tumors, as well as other forms of cancer. Full article

(This article belongs to the Special Issue Recent Advances in Luminescence: From Mechanisms to Applications)

14 pages, 6491 KiB

Open AccessArticle

Design of Ratio-Fluorescence Nanohybrid Based on Radix Hedysari Green-Synthesized CDs and GSH-AuNCs for Sensitive Detection of Cefodizime Sodium in Urine Sample

by Yan-Xin Guo, Xin-Ran Guo and Xin-Yue Chen

Int. J. Mol. Sci. 2024, 25(11), 5971; https://doi.org/10.3390/ijms25115971 - 29 May 2024

Viewed by 377

Abstract

A dual-emission ratio-fluorescent sensing nanohybrid based on Radix Hedysari green-synthesized carbon quantum dots (CDs) and glutathione-functionalized gold nanoclusters (GSH-AuNCs) had been developed for the determination of cefodizime sodium (CDZM). The designed fluorescence nanohybrid had two significant fluorescence emission peaks at 458 nm and 569 nm when excited at 360 nm, which was attributed to the CDs and GSH-AuNCs. With the addition of CDZM, the fluorescence at 458 nm was slightly weakened while the fluorescence at 569 nm was enhanced obviously. Based on the relationship between the I₅₆₉/I₄₅₈ fluorescence intensity ratio and the concentration of CDZM, the designed nanohybrid exhibited a good linearity range of 1.0–1000.0 μM and the limit of detection (LOD) was 0.19 μM. The method was finally applied in the detection of CDZM in urine, showing the potential applications in complicated biological samples. Full article

(This article belongs to the Special Issue Recent Advances in Luminescence: From Mechanisms to Applications)

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16 pages, 10232 KiB

Open AccessArticle

The Intramolecular Charge Transfer Mechanism by Which Chiral Self-Assembled H₈-BINOL Vesicles Enantioselectively Recognize Amino Alcohols

by Rong Wang, Kaiyue Song, Zhaoqin Wei, Yue Sun, Xiaoxia Sun and Yu Hu

Int. J. Mol. Sci. 2024, 25(11), 5606; https://doi.org/10.3390/ijms25115606 - 21 May 2024

Viewed by 410

Abstract

The chiral H₈-BINOL derivatives R-1 and R-2 were efficiently synthesized via a Suzuki coupling reaction, and they can be used as novel dialdehyde fluorescent probes for the enantioselective recognition of R/S-2-amino-1-phenylethanol. In addition, R-1 is much more effective than R-2. Scanning electron microscope images and X-ray analyses show that R-1 can form supramolecular vesicles through the self-assembly effect of the π-π force and strong hydrogen bonding. As determined via analysis, the fluorescence of the probe was significantly enhanced by mixing a small amount of S-2-amino-1-phenylethanol into R-1, with a redshift of 38 nm, whereas no significant fluorescence response was observed in R-2-amino-1-phenylethanol. The enantioselective identification of S-2-amino-1-phenylethanol by the probe R-1 was further investigated through nuclear magnetic titration and fluorescence kinetic experiments and DFT calculations. The results showed that this mechanism was not only a simple reactive probe but also realized object recognition through an ICT mechanism. As the intramolecular hydrogen bond activated the carbonyl group on the probe R-1, the carbonyl carbon atom became positively charged. As a strong nucleophile, the amino group of S-2-amino-1-phenylethanol first transferred the amino electrons to a carbonyl carbocation, resulting in a significantly enhanced fluorescence of the probe R-1 and a 38 nm redshift. Similarly, S-2-amino-1-phenylethanol alone caused severe damage to the self-assembled vesicle structure of the probe molecule itself due to its spatial structure, which made R-1 highly enantioselective towards it. Full article

(This article belongs to the Special Issue Recent Advances in Luminescence: From Mechanisms to Applications)

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21 pages, 8502 KiB

Open AccessArticle

Multispectral Raman Differentiation of Malignant Skin Neoplasms In Vitro: Search for Specific Biomarkers and Optimal Wavelengths

by Elena Rimskaya, Svetlana Shelygina, Alina Timurzieva, Irina Saraeva, Elena Perevedentseva, Nikolay Melnik, Konstantin Kudrin, Dmitry Reshetov and Sergey Kudryashov

Int. J. Mol. Sci. 2023, 24(19), 14748; https://doi.org/10.3390/ijms241914748 - 29 Sep 2023

Cited by 2 | Viewed by 1536

Abstract

Confocal scanning Raman and photoluminescence (PL) microspectroscopy is a structure-sensitive optical method that allows the non-invasive analysis of biomarkers in the skin tissue. We used it to perform in vitro diagnostics of different malignant skin neoplasms at several excitation wavelengths (532, 785 and 1064 nm). Distinct spectral differences were noticed in the Raman spectra of basal cell carcinoma (BCC) and squamous cell carcinoma (SCC), compared with healthy skin. Our analysis of Raman/PL spectra at the different excitation wavelengths enabled us to propose two novel wavelength-independent spectral criteria (intensity ratios for 1302 cm⁻¹ and 1445 cm⁻¹ bands, 1745 cm⁻¹ and 1445 cm⁻¹ bands), related to the different vibrational “fingerprints” of cell membrane lipids as biomarkers, which was confirmed by the multivariate curve resolution (MCR) technique. These criteria allowed us to differentiate healthy skin from BCC and SCC with sensitivity and specificity higher than 95%, demonstrating high clinical importance in the differential diagnostics of skin tumors. Full article

(This article belongs to the Special Issue Recent Advances in Luminescence: From Mechanisms to Applications)

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