Article
Optics
Gohar Hovhannesyan, Vincent Boudon, Maxence Lepers
Summary: This study presents a modified version of the Judd-Ofelt theory, which describes the intensities of f-f transitions for trivalent lanthanide ions in solids. By applying this model to europium, the researchers were able to gain physical insight into all transitions within the ground electronic configuration and quantitatively reproduce experimental absorption oscillator strengths. This model opens up the possibility to interpret polarized-light transitions between individual levels of the ion-crystal system.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Anjli Hooda, Devender Singh, Anuj Dalal, Kapeesha Nehra, Sumit Kumar, Rajender Singh Malik, Ramesh Kumar, Parvin Kumar
Summary: Heteroleptic trivalent complexes of europium were synthesized by reacting EuCl3 center dot 6H(2)O, fluorinated 1,3-diketone, and 2,2' -bipyridine or its derivatives in a molar ratio of 1:3:1. The prepared complexes were structurally analyzed through spectral study. The luminescence properties of the synthesized complexes were investigated using photoluminescence and decay spectral profiles. The complexes exhibited strong emission in the red spectral region, indicating their potential for applications in display and lighting devices.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Optics
Bartosz Bondzior, Chi Nguyen, Thi Hong Quan Vu, Diego Pugliese, Przemyslaw J. Deren, Laeticia Petit
Summary: The Judd-Ofelt theory was tested on Eu3+-doped glasses to evaluate their potential as luminescent thermometers. The theory accurately estimated the thermometric sensitivity, and the addition of B2O3 or SiO2 increased the absolute sensitivity without affecting the position of Eu3+ ions.
JOURNAL OF LUMINESCENCE
(2022)
Article
Engineering, Electrical & Electronic
N. Luewarasirikul, S. Sarachai, J. Rajagukguk, J. Kaewkhao
Summary: In this study, Eu3+-doped oxide and oxyfluoride glasses were fabricated to investigate their optical and emission properties. The results showed that the oxyfluoride glass sample has higher lasing potential, and the emitted light is reddish-orange in color.
INTEGRATED FERROELECTRICS
(2023)
Article
Optics
Benfu Qian, Yulu Wang, Qianran Zhao, Xiuqing Zhou, Haifeng Zou, Yanhua Song, Keyan Zheng, Ye Sheng
Summary: Eu3+ has been successfully incorporated into multiple sites of cubic CaCO3 nanocrystals, exhibiting different photoluminescence properties based on its location, which was characterized by various techniques including XRD, SEM, XPS, DRS, and PL spectroscopy. The different PL intensities of CaCO3:0.02Eu3+ nanoparticles were attributed to the different sites of Eu3+ within the CaCO3 nanocrystals, with one site near the surface being similar to a glasslike environment, and another site within the inner lattice associated with an ordered crystalline environment.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
Kapeesha Nehra, Anuj Dalal, Anjli Hooda, Devender Singh, Sumit Kumar, Rajender Singh Malik
Summary: A series of heteroleptic luminescent europium moieties based on 1,10-phenanthroline and its derivatives were synthesized and studied for their photophysical characteristics through theoretical and experimental methods. The results showed that these complexes exhibited good quantum efficiency and emission properties, making them suitable for the design of various display devices.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Materials Science, Ceramics
Ram Gopal, Jairam Manam
Summary: The article investigates the photoluminescence properties of BaWO4: Eu3+ red phosphors excited by UV, near-UV, and blue light. The addition of Eu3+ ions leads to optical band gap narrowing. The most intense peaks for excitation occur at 255 nm (UV), 395 nm (near-UV), and 465 nm (blue), and the emission spectra at these excitation wavelengths are identical. The synthesized material shows potential as a red phosphor for white-LED, laser, and display devices.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Pooja Hooda, Vaishnavi Lather, R. K. Malik, V. B. Taxak, S. P. Khatkar, Savita Khatri, Pratibha Ahlawat, Rajesh Kumar
Summary: The synthesis of europium (III) complexes using beta-keto acid and nitrogen donor chelates by grinding technique showed promising applications in lighting devices, lasers, solar cells, semiconductors, and biomedical field. Characteristic luminescence peak, color purity, and optical properties suggest potential use in display devices and optoelectronics. Biological studies indicate better results for complexes than ligands in pharmaceutical applications, hinting at their future potential in biomedical research.
Article
Materials Science, Ceramics
M. Mohapatra, P. Vinothkumar, K. Sathyamoorthy, Priya Murugasen
Summary: By adjusting the Si/Li ratio, the photoluminescence intensity and decay time values of these ceramic compounds can be increased. Rare earth ions stabilize themselves at interstitial positions in the lattice with approximately C-2v symmetry. The four ceramic samples doped with Eu exhibit near red emission and good quantum efficiencies for phosphors.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Anuj Dalal, Kapeesha Nehra, Anjli Hooda, Sitender Singh, Shri Bhagwan, Devender Singh, Sumit Kumar
Summary: This study reports the synthesis and photoluminescence performance of a series of heteroleptic europium complexes with fluorinated chromophoric ligand and 2,2'-bipyridine or their derivatives as ancillary ligand. The structure and photoluminescence properties of the synthesized complexes were analyzed using various spectroscopic techniques. The experimental and theoretical results from LUMPAC software show that the prepared complexes exhibit red emissive nature and can be used as red light emitting materials in various display devices.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
M. A. Marzouk, F. H. ElBatal, Y. M. Hamdy, H. A. ElBatal
Summary: Undoped glass and Nd2O3-doped samples were prepared and investigated for lasing application. The undoped sample showed two UV absorption peaks, while Nd2O3-doped samples exhibited 10 distinct peaks in the UV-Visible range. Emission spectra revealed three different bands at 875 nm, 1056 nm, and 1326 nm. Judd-Ofelt theory was used to estimate Judd-Ofelt parameters and radiative properties. FTIR vibrational analysis suggested the presence of different chemical groups and structural transformations in the samples.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Optics
Kapeesha Nehra, Anuj Dalal, Anjli Hooda, Sitender Singh, Devender Singh
Summary: Highly red luminescent octacoordinated complexes were successfully synthesized by coordinating Eu(III) ion with auxiliary ligands. Spectroscopic characterization revealed the red luminescent properties of the complexes, indicating effective sensitization of the trivalent europium ion. Various parameters were calculated from the photoluminescence emission data, and color parameters suggested the red luminous behavior of the synthesized complexes. The research findings indicate the potential applications of these complexes in solid state lighting, OLEDs, and flat panel displays.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Anuj Dalal, Kapeesha Nehra, Anjli Hooda, Devender Singh, Sumit Kumar, Rajender Singh Malik
Summary: A series of octa coordinated tris(2-benzoylacetophenonate)europium complexes were synthesized with bidentate heteroaromatic auxiliary ligands, such as 2,2'-Bipyridine (Bpy) and its derivatives. The synthesized materials were structurally analyzed using various spectroscopic techniques. The results showed that these complexes exhibited good luminescence intensity, high quantum efficiency, and long luminescence lifetime, indicating their potential as red light emitting materials in flat panel displays and optoelectronic devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Analytical
Nishita Dua, Monika Punia, Pooja Chhillar, Manisha Bedi, Satyender Pal Khatkar, Vinod Bala Taxak, Priti Boora Doon
Summary: The study synthesized one binary and four ternary Eu(III)-based complexes with high thermal stability and promising potential for organic light-emitting diodes. The optical parameters of the complexes, such as nonradiative and radiative decay rates, luminescence decay time, and intrinsic quantum efficiency, were determined. The complexes exhibited red light emission and can be used in military radars and biological labeling.
Article
Chemistry, Analytical
Anuj Dalal, Kapeesha Nehra, Anjli Hooda, Devender Singh, Sumit Kumar, Rajender Singh Malik
Summary: Solid ternary europium complexes were synthesized using fluorinated beta-diketone and heteroaromatic bidentate auxiliary ligands. The luminescence features of the complexes were studied and showed efficient sensitization of the Eu3+ ion. The complexes were effectively excited in the UV region and exhibited characteristic red emission peaks. The properties of the complexes were determined and theoretical estimations were made.
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)