Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy最新文献

英文中文

High-resolution infrared imaging performance of new high numerical aperture Schwarzschild objectives

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-20 DOI: 10.1016/j.saa.2025.125769

Karolina Kadela , Honorata Oleś , Karolina Kosowska , Danuta Liberda-Matyja , Wiktoria Wiatrowska , Kinga Cader , Natalia Grabowska , Kaja Piana , Szymon Tott , Maciej Roman , Paulina Kozioł-Bohatkiewicz , Tomasz P. Wróbel

Mid-Infrared (IR) microspectroscopy is an advanced technique that enables the examination of samples providing micrometer-level spatial resolution and generating detailed chemical imaging of the samples. However, despite its advantages, spatial resolution in far-field optical microscopy and image resolution is limited by diffraction and there is a constant desire to push this limitation further. High numerical aperture (NA) objectives have been available for decades but primarily in the form of refractive lenses, however, these lack broadband capability, as they introduce chromatic aberrations. A reflective type objectives avoid this problem at the expense of lower NA and recently reflective objectives with an improved design and NA ranging from 0.7 to 0.8 were released. This study characterized the spatial resolution and signal to noise ratio (SNR) of new high numerical aperture infrared reflective objectives of NA = 0.7 (20x) and NA = 0.78 (40x) and compared their performance to the commonly used 15x (NA = 0.4) and 36x (NA = 0.52) objectives on a set of polymer and tissue samples using a benchtop IR microscope. It was found that the spatial resolution reaches values below 3 µm for the highest NA objective and approximately 6 µm for the lowest NA objective for shortest wavelengths. At the same time, the high-NA objectives provided better SNR compared to a similar magnification objective in both transmission and transflection geometry. Finally, a 3 µm PMMA sphere was successfully imaged using a conventional IR source (not a synchrotron or a laser), giving an impressive performance of the objectives.

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引用次数: 0

High-throughput precision assessment of pea-derived protein products using near infrared hyperspectral imaging

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-20 DOI: 10.1016/j.saa.2025.125770

Christopher Kucha , Anusha Samaranayaka , Praiya Asavajaru , Michael Ngadi

This study aims to develop rapid and non-invasive methods based on near-infrared hyperspectral imaging and chemometrics for quantitative prediction of chemical compositions of pea-derived products. Hyperspectral imaging was used to acquire images from pea processing streams, namely pea flour, pea protein concentrate, and pea protein isolate. The PLS algorithm was used to develop quantitative prediction models based on the relationship between the hyperspectral image data and the chemical compositions of the pea products, including moisture, protein, ash, insoluble fiber, and total starch. Prediction results in terms of coefficient of determination (R²) and root mean square errors in the prediction (RMSEP) datasets show accurate results for moisture (R² = 0.844, RMSEP = 0.407 %), protein (R² = 0.99, RMSEP = 2.074 %), ash (R² = 0.778, RMSEP = 0.474 %), and total starch (R² = 0.991, RMSEP = 2.316 %) contents. Low prediction accuracy was obtained for insoluble fiber (R² = 0.597, RMSEP 2.474 %) content. The accurate prediction achieved by hyperspectral imaging highlights its suitability for high throughput multi-parameter assessment of pea-derived products, which is particularly important given their increasing market demand.

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引用次数: 0

Comprehensive comparison on different wavelength selection methods using several near-infrared spectral datasets with different dimensionalities

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-19 DOI: 10.1016/j.saa.2025.125767

Tao Wang , Yun Zheng , Lilan Xu , Yong-Huan Yun

NIR spectroscopy is widely used in chemical analysis, agricultural science, food safety, and other fields, but its high dimensionality and data redundancy bring analytical challenges. This study aims to compare the performance of different wavelength selection methods in NIR spectral datasets with different dimensionalities to provide a reference for researchers. The wavelength selection methods in this study were classified into four categories according to their principles, which are partial least squares (PLS) parameter-based methods, intelligent optimization algorithms (IOA)-based methods, model population analysis (MPA)-based methods and wavelength interval selection (WIS) methods. The performance of the models was compared in terms of R²_C, R²_P, root mean square error of calibration (RMSEC), root mean square error of prediction (RMSEP), the number of selected variables, computational time, and the improvement ratio of RMSEP (iRMSEP). The results showed that the models established by MPA-based and WIS methods were more stable and superior to the other categories of wavelength selection methods in most datasets. During the twenty characteristic wavelength selection methods in this study, bootstrapping soft shrinkage (BOSS) and genetic algorithm interval partial least squares (GA-iPLS) show the best performance at the overall level.

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引用次数: 0

Lophine incorporated azo dye as a novel colorimetric sensor for multiple metal ions

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-18 DOI: 10.1016/j.saa.2025.125760

Shiv R. Desai , Vidhi V. Bhopekar , Rinkal B. Bhoraniya , Mahesh Koladiya , Sachin G. Modha

A single molecule sensor for several analytes is indeed desired by the scientists around the world due to obvious advantages. In this report we present a new class of Lophine incorporated azo dyes that has capacity of differential colorimetric detection of several metal ions. Interestingly the sensor was found to have pH dependent selective response towards several metals. The effective colorimetric detection was observed under neutral pH for Cu⁺², Al⁺³ and Fe⁺³ metal ions while under alkaline pH for Cu⁺², Zn⁺², Ni⁺² and Co⁺² metal ions. The detailed investigation of synthesis, characterization, spectroscopic analysis and application of the novel colorimetric sensor is presented here in. The sensor is effective under non-aqueous conditions which provides a complementary detection method for metals in non-aqueous environment.

引用次数: 0

Editorial: 21st meeting of the international council for near infrared spectroscopy – NIR 2023

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-17 DOI: 10.1016/j.saa.2025.125764

Krzysztof B. Bec, Christian W. Huck

NIR 2023, or the 21st meeting of The International Council for Near Infrared Spectroscopy (ICNIRS), held in Innsbruck, Austria, in August 2023, was a significant event for the NIR spectroscopy community, bringing together 386 participants from 37 countries. This editorial introduces the Special Issue of Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, featuring nearly 30 articles that represent the topics from the conference. Like the NIR 2023 event itself, this collection highlights advancements in NIR spectroscopy, including fundamental research, instrumentation, and applications. Featured studies present contemporary focus in the methodology, including machine learning and AI integration, hyperspectral imaging, or process analytical technology (PAT), as well as reflect the trends in applications. The latter feature broad diversity, which NIR spectroscopy is known for, ranging from agriculture and food safety to pharmaceuticals and environmental monitoring. The contributions prove the continued evolution of NIR spectroscopy as a versatile, non-destructive analytical tool, reflecting its growing impact across multiple scientific disciplines.

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引用次数: 0

Resonance SERS probe based on the bifunctional molecule IR808 combined with SA test strips for highly sensitive detection of monkeypox virus

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-16 DOI: 10.1016/j.saa.2025.125761

Hongmei Li , Kai-Le Zhang , Yichuan Kou , Shanshan Xu , Xian-Ming Guo , Shi-Ying Fu , Zhiyong Li , Yue-Jiao Zhang , Xueqin Chen , Jian-Feng Li

As a zoonotic virus, highly sensitive detection of monkeypox virus is crucial for its prevention and control due to its rapid increase in cases worldwide and the extremely high risk of virus transmission. In this paper, based on the principle of antigen–antibody specific recognition, an ultrasensitive resonance Raman biosensing probe was prepared using a molecule with the bifunctionality of resonance Raman effect and capturing antibody; and with the strong affinity of the biotin-streptavidin (Bio-SA) system, Bio-antibody and SA test strips were prepared. To match the T-line of the test strip, a portable Raman instrument with a strip-shaped spot was designed. Its 0.2 mm spot width ensures full coverage of the T-line and stability of the obtained SERS spectrum of the test strip. Finally, in the pharyngeal swab system, the false positives generated by complex matrix interference were effectively reduced by utilizing the excellent hydrophobicity of S9 surfactant at a concentration of 0.5 %, ultimately achieving a detection limit of 1 pg/mL and taking less than 15 min. Experimental data shows that the SERS performance of SERRS probes is at least 2 orders of magnitude better than that of other highly sensitive molecular probes. Based on the use of bifunctional molecules and the affinity of the BiO-SA system, this approach ensures the strength of SERS signals, more efficient antibody loading, and the ability of the test strip to capture probes, and the effectiveness of surfactant S9% in suppressing false positives in throat swab systems was verified. The experiment proved that the scheme had certain reference value for the high-sensitivity POCT rapid detection of monkeypox virus based on SERS technology.

{"title":"Resonance SERS probe based on the bifunctional molecule IR808 combined with SA test strips for highly sensitive detection of monkeypox virus","authors":"Hongmei Li , Kai-Le Zhang , Yichuan Kou , Shanshan Xu , Xian-Ming Guo , Shi-Ying Fu , Zhiyong Li , Yue-Jiao Zhang , Xueqin Chen , Jian-Feng Li","doi":"10.1016/j.saa.2025.125761","DOIUrl":"10.1016/j.saa.2025.125761","url":null,"abstract":"<div><div>As a zoonotic virus, highly sensitive detection of monkeypox virus is crucial for its prevention and control due to its rapid increase in cases worldwide and the extremely high risk of virus transmission. In this paper, based on the principle of antigen–antibody specific recognition, an ultrasensitive resonance Raman biosensing probe was prepared using a molecule with the bifunctionality of resonance Raman effect and capturing antibody; and with the strong affinity of the biotin-streptavidin (Bio-SA) system, Bio-antibody and SA test strips were prepared. To match the T-line of the test strip, a portable Raman instrument with a strip-shaped spot was designed. Its 0.2 mm spot width ensures full coverage of the T-line and stability of the obtained SERS spectrum of the test strip. Finally, in the pharyngeal swab system, the false positives generated by complex matrix interference were effectively reduced by utilizing the excellent hydrophobicity of S9 surfactant at a concentration of 0.5 %, ultimately achieving a detection limit of 1 pg/mL and taking less than 15 min. Experimental data shows that the SERS performance of SERRS probes is at least 2 orders of magnitude better than that of other highly sensitive molecular probes. Based on the use of bifunctional molecules and the affinity of the BiO-SA system, this approach ensures the strength of SERS signals, more efficient antibody loading, and the ability of the test strip to capture probes, and the effectiveness of surfactant S9% in suppressing false positives in throat swab systems was verified. The experiment proved that the scheme had certain reference value for the high-sensitivity POCT rapid detection of monkeypox virus based on SERS technology.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"331 ","pages":"Article 125761"},"PeriodicalIF":4.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143043927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid and sensitive detection of exosomal microRNAs by terahertz metamaterials

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-16 DOI: 10.1016/j.saa.2025.125745

Yi Zhou , Yu Liu , Zhen Zong , Honghao Huang , Ling Liang , Xiang Yang , Mei Xin , Huiyan Tian , Fengxin Xie , Weidong Jin , Jining Li , Ke Yang

Exosomal microRNAs (miRNAs) are among the most common biomarkers for tumor diagnosis. However, single-miRNA detection lacks ideal sensitivity and specificity for diagnosing a certain tumor in clinics. In this work, we fabricated a convenient multi-miRNA detection platform for sensitive and specific detection on exosomal miRNAs in the plasma of patients using a terahertz (THz) metamaterial biosensor on the basis of strand displacement amplification (SDA) and AuNPs. The proposed multi-miRNA detection platform was highly sensitive to miRNA-15, miRNA-21, miRNA-145, miRNA-155, miRNA-423, and miRNA-451, and the limit of detection (LOD) obtained were 12.54 aM, 19.66 aM, 17.50 aM, 25.40 aM, 24.11 aM and 26.59 aM, respectively. The biosensor we constructed can be used to diagnose pancreatic cancer patients effectively in complex clinical samples. The use of multiple miRNAs demonstrated strong practicality in the combined diagnosis of patients with pancreatic cancer. These studies demonstrate that the multi-RNA detection platform boasts advantages such as low cost, rapid, high sensitivity, and specificity, offering a potential tool for future clinical applications.

{"title":"Rapid and sensitive detection of exosomal microRNAs by terahertz metamaterials","authors":"Yi Zhou , Yu Liu , Zhen Zong , Honghao Huang , Ling Liang , Xiang Yang , Mei Xin , Huiyan Tian , Fengxin Xie , Weidong Jin , Jining Li , Ke Yang","doi":"10.1016/j.saa.2025.125745","DOIUrl":"10.1016/j.saa.2025.125745","url":null,"abstract":"<div><div>Exosomal microRNAs (miRNAs) are among the most common biomarkers for tumor diagnosis. However, single-miRNA detection lacks ideal sensitivity and specificity for diagnosing a certain tumor in clinics. In this work, we fabricated a convenient multi-miRNA detection platform for sensitive and specific detection on exosomal miRNAs in the plasma of patients using a terahertz (THz) metamaterial biosensor on the basis of strand displacement amplification (SDA) and AuNPs. The proposed multi-miRNA detection platform was highly sensitive to miRNA-15, miRNA-21, miRNA-145, miRNA-155, miRNA-423, and miRNA-451, and the limit of detection (LOD) obtained were 12.54 aM, 19.66 aM, 17.50 aM, 25.40 aM, 24.11 aM and 26.59 aM, respectively. The biosensor we constructed can be used to diagnose pancreatic cancer patients effectively in complex clinical samples. The use of multiple miRNAs demonstrated strong practicality in the combined diagnosis of patients with pancreatic cancer. These studies demonstrate that the multi-RNA detection platform boasts advantages such as low cost, rapid, high sensitivity, and specificity, offering a potential tool for future clinical applications.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"330 ","pages":"Article 125745"},"PeriodicalIF":4.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143043922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lysosomal-targeted fluorescent probe for detecting SO2 derivatives in human umbilical vein endothelial cells

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-15 DOI: 10.1016/j.saa.2025.125753

Feng Li , Xian-Fang Liu , Bao-Xiang Zhao , Zhao-Min Lin

A fluorescent probe (NBC), constructed by benzothiazole-coumarin and naphthalimide derivatives, was developed for the detection of SO₂ derivatives using the FRET (Förster Resonance Energy Transfer) strategy. NBC presented large Stokes shift (180 nm), fast response (2 min), high sensitivity (LOD: 45 nM) and an excellent linear relationship in response to SO₂ derivatives. Moreover, NBC has been successfully applied to detect SO₂ derivatives in food samples and living cells. NBC holds significant potential for monitoring changes in both exogenous and endogenous SO₂ derivatives in human umbilical vein endothelial cells (HUVEC cells). Additionally, it demonstrates remarkable lysosomal-targeting capabilities, allowing for the observation of dynamic alterations within lysosomes.

引用次数: 0

Detecting the saddling deformations in nickel meso-phenyl substituted porphyrins using low-frequency Raman characteristic peaks 利用低频拉曼特征峰检测镍中苯基取代卟啉的鞍形变形。

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-15 DOI: 10.1016/j.saa.2025.125750

Shenhao Wang , Qing Huang

The out-of-plane (OOP) deformations of metalloporphyrins macrocycle are closely related to their biological functions, and Raman spectroscopy is a powerful tool for investigating OOP deformations. However, due to the interplay of electronic structure, substituents, porphyrin macrocycle in-plane (IP) and OOP deformations, it is challenging to measure the OOP deformations directly, or, establish a confirmative correlation between the frequency shifts of characteristic peaks and specific OOP deformation changes. In this work, we first selected the model porphyrin Ni-P and employed DFT calculations to explore the relationship between the ruffling and saddling deformation changes and their corresponding Raman spectral differences. Subsequently, we focused on nickel meso-tetraphenyl porphyrin (NiTPP), nickel meso-tetrachlorophenylporphyrin (NiTClP), and nickel meso-tetramethoxyphenyl porphyrin (NiTMeOP), which are structurally similar in nature, and investigated the relationship between their OOP deformations and Raman spectra bands based on both experiments and DFT calculations. The results indicate that the ruffling deformation magnitudes of the three nickel porphyrins are almost identical, while the saddling deformation magnitudes differ remarkably. The frequency change of the characteristic peak

γ_{18}

in relation to saddling deformation of the three porphyrins is

7.7 {c m}^{- 1} / Å

, which is close to that of the model porphyrin Ni-P

10.6 {c m}^{- 1} / Å

. Therefore, the characteristic peak

γ_{18}

can be used as a “reporter” for the change in saddling deformation. As such, this work demonstrates how to utilize the frequency shifts of low-frequency Raman characteristic peaks to identify the OOP deformation changes of the porphyrin macrocycle caused by variations in the external environment, thereby providing a theoretically assisted tool for revealing the reasons for their biological function variations.

金属卟啉大环的面外变形与其生物学功能密切相关，而拉曼光谱是研究金属卟啉大环面外变形的有力工具。然而，由于电子结构、取代基、卟啉面内大环（IP）与OOP变形的相互作用，直接测量OOP变形或建立特征峰频移与OOP具体变形变化之间的确切相关性具有挑战性。在这项工作中，我们首先选择了模型卟啉Ni-P，并采用DFT计算来探索褶边和鞍形变形变化与其对应的拉曼光谱差异之间的关系。随后，我们重点研究了结构性质相似的镍中四苯基卟啉（NiTPP）、镍中四氯苯基卟啉（NiTClP）和镍中四甲基氧基卟啉（NiTMeOP），并基于实验和DFT计算研究了它们的OOP变形与拉曼光谱带的关系。结果表明，三种镍卟啉的褶皱变形量基本相同，而鞍形变形量差异较大。三种卟啉的马鞍变形特征峰γ - 18的频率变化为7.7cm-1/Å，与模型卟啉Ni-P的10.6cm-1/Å接近。因此，特征峰γ - 18可以作为鞍形变形变化的“报告者”。因此，本工作展示了如何利用低频拉曼特征峰的频移来识别外部环境变化引起的卟啉大环的OOP变形变化，从而为揭示其生物功能变化的原因提供了理论上的辅助工具。

{"title":"Detecting the saddling deformations in nickel meso-phenyl substituted porphyrins using low-frequency Raman characteristic peaks","authors":"Shenhao Wang , Qing Huang","doi":"10.1016/j.saa.2025.125750","DOIUrl":"10.1016/j.saa.2025.125750","url":null,"abstract":"<div><div>The out-of-plane (OOP) deformations of metalloporphyrins macrocycle are closely related to their biological functions, and Raman spectroscopy is a powerful tool for investigating OOP deformations. However, due to the interplay of electronic structure, substituents, porphyrin macrocycle in-plane (IP) and OOP deformations, it is challenging to measure the OOP deformations directly, or, establish a confirmative correlation between the frequency shifts of characteristic peaks and specific OOP deformation changes. In this work, we first selected the model porphyrin Ni-P and employed DFT calculations to explore the relationship between the ruffling and saddling deformation changes and their corresponding Raman spectral differences. Subsequently, we focused on nickel <em>meso</em>-tetraphenyl porphyrin (NiTPP), nickel <em>meso</em>-tetrachlorophenylporphyrin (NiTClP), and nickel <em>meso</em>-tetramethoxyphenyl porphyrin (NiTMeOP), which are structurally similar in nature, and investigated the relationship between their OOP deformations and Raman spectra bands based on both experiments and DFT calculations. The results indicate that the ruffling deformation magnitudes of the three nickel porphyrins are almost identical, while the saddling deformation magnitudes differ remarkably. The frequency change of the characteristic peak <span><math><mrow><msub><mi>γ</mi><mn>18</mn></msub></mrow></math></span> in relation to saddling deformation of the three porphyrins is <span><math><mrow><mn>7.7</mn><mspace></mspace><msup><mrow><mi>c</mi><mi>m</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup><mo>/</mo><mi>Å</mi></mrow></math></span>, which is close to that of the model porphyrin Ni-P <span><math><mrow><mn>10.6</mn><mspace></mspace><msup><mrow><mi>c</mi><mi>m</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup><mo>/</mo><mi>Å</mi></mrow></math></span>. Therefore, the characteristic peak <span><math><mrow><msub><mi>γ</mi><mn>18</mn></msub></mrow></math></span> can be used as a “reporter” for the change in saddling deformation. As such, this work demonstrates how to utilize the frequency shifts of low-frequency Raman characteristic peaks to identify the OOP deformation changes of the porphyrin macrocycle caused by variations in the external environment, thereby providing a theoretically assisted tool for revealing the reasons for their biological function variations.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"330 ","pages":"Article 125750"},"PeriodicalIF":4.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143019120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on luminescence characteristics of Dy3+-Tb3+ co-doped phospho-tellurite glasses for tunable green/ white LED applications

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Pub Date : 2025-01-15 DOI: 10.1016/j.saa.2025.125756

Joydeb Biswas, Samar Jana, Sourav Ghosh

Dy³⁺/Tb³⁺ co-doped glasses have drawn profound attention for their potential in solid state lighting due to their unique luminescence properties. This research highlights the effect of compositional variation on structural and optical characteristics of Dy³⁺/Tb³⁺ co-doped phospho-tellurite glasses through a comprehensive analysis involving X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and photoluminescence (PL) studies. XRD and FTIR spectroscopy are conducted to characterize the glass matrix and confirm its structural integrity. Luminescence spectroscopy is used to explicate the emission mechanism of the present glass system, revealing significant decrement in both intensity (Dy³⁺ & Tb³⁺) and wavelength tunability when glass network is modified by monovalent (Na⁺) to trivalent (B³⁺) compounds. Photoluminescence measurements provide insights into the glass system for the efficient energy transfer between Dy³⁺ and Tb³⁺ ions, leading to strong visible (yellow & green) emissions. The luminescence decay kinetics is analyzed to understand the dynamic processes, governing the emission lifetimes and energy transfer mechanisms. Additionally, CIELab color coordinates are employed to assess the colour purity and tunability of the emitted light. The outcomes suggest that the present glasses offer promising attributes for multicolor light generation, paving a pathway towards optimizing material design in the field of solid state lighting.

{"title":"Investigation on luminescence characteristics of Dy3+-Tb3+ co-doped phospho-tellurite glasses for tunable green/ white LED applications","authors":"Joydeb Biswas, Samar Jana, Sourav Ghosh","doi":"10.1016/j.saa.2025.125756","DOIUrl":"10.1016/j.saa.2025.125756","url":null,"abstract":"<div><div>Dy<sup>3+</sup>/Tb<sup>3+</sup> co-doped glasses have drawn profound attention for their potential in solid state lighting due to their unique luminescence properties. This research highlights the effect of compositional variation on structural and optical characteristics of Dy<sup>3+</sup>/Tb<sup>3+</sup> co-doped phospho-tellurite glasses through a comprehensive analysis involving X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and photoluminescence (PL) studies. XRD and FTIR spectroscopy are conducted to characterize the glass matrix and confirm its structural integrity. Luminescence spectroscopy is used to explicate the emission mechanism of the present glass system, revealing significant decrement in both intensity (<strong>Dy</strong><sup><strong>3+</strong></sup> <strong>& Tb</strong><sup><strong>3+</strong></sup>) and wavelength tunability when glass network is modified by monovalent (Na<sup>+</sup>) to trivalent (B<sup>3+</sup>) compounds. Photoluminescence measurements provide insights into the glass system for the efficient energy transfer between Dy<sup>3+</sup> and Tb<sup>3+</sup> ions, leading to strong visible (<strong>yellow</strong> & <strong>green</strong>) emissions. The luminescence decay kinetics is analyzed to understand the dynamic processes, governing the emission lifetimes and energy transfer mechanisms. Additionally, CIELab color coordinates are employed to assess the colour purity and tunability of the emitted light. The outcomes suggest that the present glasses offer promising attributes for multicolor light generation, paving a pathway towards optimizing material design in the field of solid state lighting.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"331 ","pages":"Article 125756"},"PeriodicalIF":4.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143061879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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