Article
Biochemistry & Molecular Biology
Joao Sousa, Carla M. Magalhaes, Patricia Gonzalez-Berdullas, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: Chemi- and bioluminescence are remarkable light-emitting phenomena that convert thermal energy into excitation energy through (bio)chemical reactions. In this study, a novel dibrominated Coelenterazine analog with superior chemiluminescent properties was synthesized and characterized. This compound exhibited enhanced luminescence in terms of total light output and emission lifetime compared to natural imidazopyrazinones and commercially available analogs in aprotic media, showing potential as a basis for optimized probes for reactive oxygen species.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Analytical
Jose Pedro Silva, Patricia Gonzalez-Berdullas, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: A new Coelenterazine derivative with potential for superoxide anion sensing was synthesized and found to exhibit dose-dependent chemiluminescence when triggered by the ROS species. The light emission intensities of this derivative were significantly enhanced in aqueous solutions at different pH conditions compared to native Coelenterazine, and the chemiluminescent signal half-life was greatly increased.
Article
Biochemistry & Molecular Biology
Genta Kamiya, Nobuo Kitada, Tadaomi Furuta, Takashi Hirano, Shojiro Maki, Sung Bae Kim
Summary: The present study introduces a unique BL signature imaging system with novel CTZ analogues named C-series. It examines the BL intensity patterns and spectra of nine C-series CTZ analogues according to marine luciferases. The results show that four CTZ analogues, C3, C4, C6, and C7, luminesce with distinctive BL spectral signatures and intensity patterns according to different luciferases. These findings provide a unique methodology to specify each signal in a single- or multi-reporter system using unique BL signatures and patterns of reporter luciferases.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
El Hadi Erbiai, Patricia Gonzalez-Berdullas, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: In this study, the chemiluminescent properties of Coelenterazine and its two halogenated analogs were investigated. It was found that they exhibited a significant enhancement of light emission in aqueous solution, but almost no emission in aprotic solvents. Interestingly, Coelenterazine showed stronger light emission in aprotic solvents, while the chemiluminescence of the analogs was significantly quenched in water compared to methanol and aprotic solvents. These findings suggest that the observed quenching effect in water is attributed to Coelenterazine, rather than intrinsic enhanced emission of the analogs. Overall, we present Coelenterazine analogs that could be used for enhanced sensing of superoxide anion, providing valuable insights into this chemiluminescent system.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Jose Pedro Silva, Patricia Gonzalez-Berdullas, Mariana Pereira, Diana Duarte, Jose E. Rodriguez-Borges, Nuno Vale, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: Chemiluminescence is a fascinating process that allows light emission without the need for photoexcitation. In this study, a halogenated Coelenterazine analog was synthesized, and its potential anticancer activity and chemiluminescence were characterized. The results showed that this analog exhibited enhanced emission in aqueous solution when triggered by superoxide anions and was compatible with human cell lines. The analysis also provided insights into the cytotoxicity and structural properties of brominated Coelenterazines, which have selective anticancer activity. Furthermore, the combination approach with a known chemotherapeutic agent improved its profile. These findings are valuable for future optimizations of halogenated Coelenterazine analogs.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Gaku Mizuno, Daichi Yano, Jose Paitio, Hiromitsu Endo, Yuichi Oba
Summary: The lantern shark genus Etmopterus consists of approximately 40 species of bioluminescent cartilaginous fishes that emit blue light mainly from their ventral body surface. This study detected both coelenterazine and coelenterazine-dependent luciferase activity in the ventral photophore tissue of Etmopterus molleri, suggesting that bioluminescence in lantern sharks is produced using coelenterazine as a substrate for the luciferin-luciferase reaction, similar to some luminous bony fishes.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2021)
Article
Chemistry, Analytical
Justin J. J. O'Sullivan, Vanessa J. J. Lee, Marie C. C. Heffern
Summary: The development of bioluminescence-based tools has steadily grown in chemical biology, with applications ranging from reporter genes to assay development and targeted imaging. This study investigates the mechanism behind the observed copper inhibition on nonhomologous marine luciferases' light emission and demonstrates that the inhibition is not due to luciferase interaction but the chemical oxidation of imidazopyrazinone luciferins.
Article
Biochemistry & Molecular Biology
Carla M. Magalhaes, Patricia Gonzalez-Berdullas, Mariana Pereira, Diana Duarte, Nuno Vale, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: Cancer is a challenging disease to treat, and this study focuses on the design, synthesis, and evaluation of different brominated coelenteramines as potential anticancer molecules. The results highlight the importance of the 4-bromophenyl moiety for their anticancer activity and suggest independent mechanisms of action compared to coelenterazines. One of the studied coelenteramines showed promise in improving the profile of a known chemotherapeutic agent.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Patricia Gonzalez-Berdullas, Renato B. Pereira, Claudia Teixeira, Jose Pedro Silva, Carla M. Magalhaes, Jose E. Rodriguez-Borges, David M. Pereira, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: Halogenated derivatives of Coelenterazine, specifically brominated Coelenteramide and Coelenteramine, have been found to exhibit potent anticancer activity against gastric and lung cancer cells. These compounds show a certain level of safety towards noncancer cells and induce cell death through apoptosis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biology
Svetlana V. Markova, Marina D. Larionova, Igor A. Korotov, Eugene S. Vysotski
Summary: We have identified the minimal sequence required for the bioluminescent activity of copepod luciferases from Metridia longa and Gaussia princeps. This sequence displays high homology with other copepod luciferases, suggesting that the boundaries of the catalytic domain are the same for all known copepod luciferases. We have also demonstrated the involvement of the flexible C-terminus in retaining the bioluminescent reaction product and the successful use of a shortened mutant as a miniature bioluminescent reporter in living cells.
Article
Biochemistry & Molecular Biology
Shusei Kanie, Mami Komatsu, Yasuo Mitani
Summary: Lucensosergia lucens lacks known or homologous coelenterazine-dependent luciferase genes, but RNA-Seq analysis suggests the presence of unknown proteinaceous components for coelenterazine luminescence.
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Tao Sun, Qinjun Chen, Zheng Zhou, Chao Li, Teng Yu, Chen Jiang
Summary: In this study, a targeting peptide-conjugated chemiluminescent reporter (OFF) was developed to detect and visualize inflammatory diseases. The reporter was recognized by neutrophils and transported to inflamed tissues characterized by overexpressed superoxide anion (O2·-). The chemiluminescent probe specifically responded to O2·- and released photons (ON) for early detection and precise excision of micrometastatic lesions.
JOURNAL OF CONTROLLED RELEASE
(2023)
Article
Chemistry, Analytical
Sung-Bae Kim, Tadaomi Furuta, Nobuo Kitada, Shojiro A. A. Maki
Summary: A series of new artificial luciferases (ALucs) were created by compensating missing peptide blocks in the alignment of existing ALuc sequences. These new ALucs formed an independent branch genetically isolated from other natural marine luciferases and showed bioluminescent properties in living mammalian cells. The success of this study can provide new insights into engineering and functionalizing marine luciferases for various applications in bioassays and molecular imaging.
Article
Biochemistry & Molecular Biology
Daichi Yano, Manabu Bessho-Uehara, Jose Paitio, Masakazu Iwasaka, Yuichi Oba
Summary: Research suggests that the luciferase of lanternfish may consist of 14-3-3 proteins, which share similar molecular weights and properties. The addition of specific compounds could potentially inhibit the luciferase activity.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Review
Chemistry, Multidisciplinary
Aisha J. Syed, James C. Anderson
Summary: Bioluminescence is a natural phenomenon where living creatures produce light through a reaction between luciferin and luciferase. Various luciferin-luciferase pairs have different applications, such as gene assays and drug discovery. In recent years, bioluminescence has found increasing applications in biomedicine, including photodynamic therapy and neuron control.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Physical
Jose Pedro Silva, Patricia Gonzalez-Berdullas, Mariana Pereira, Diana Duarte, Jose E. Rodriguez-Borges, Nuno Vale, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: Chemiluminescence is a fascinating process that allows light emission without the need for photoexcitation. In this study, a halogenated Coelenterazine analog was synthesized, and its potential anticancer activity and chemiluminescence were characterized. The results showed that this analog exhibited enhanced emission in aqueous solution when triggered by superoxide anions and was compatible with human cell lines. The analysis also provided insights into the cytotoxicity and structural properties of brominated Coelenterazines, which have selective anticancer activity. Furthermore, the combination approach with a known chemotherapeutic agent improved its profile. These findings are valuable for future optimizations of halogenated Coelenterazine analogs.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
El Hadi Erbiai, Abdelfettah Maouni, Luis Pinto da Silva, Rabah Saidi, Mounir Legssyer, Zouhaire Lamrani, Joaquim C. G. Esteves da Silva
Summary: This study investigates the chemical compositions and antioxidant properties of two wild edible mushrooms in northern Morocco. The results show that both mushrooms contain various bioactive compounds with important biological activities, making them potentially valuable for the food and pharmaceutical industries.
Article
Environmental Sciences
Hamza El Azhari, El Khalil Cherif, Otmane Sarti, El Mustapha Azzirgue, Houria Dakak, Hasna Yachou, Joaquim C. G. Esteves da Silva, Farida Salmoun
Summary: The study aimed to improve the assessment of surface water quality and geochemical analysis in the Oued Laou watershed, Northern Morocco, in order to evaluate the impact of anthropogenic activities on surface water quality. By using emerging techniques such as multivariate statistical approaches, water quality indices, irrigation water quality indices, and Geographic Information System, the study found that most parameters had concentrations below World Health Organization (WHO) limits, except for bicarbonate ions (HCO3-) and biochemical oxygen demand for five days (BOD5). It was also found that the Oued Laou river was exposed to contamination from both anthropogenic activities and water-sediment interaction. The combination of water quality indices, principal component analysis, irrigation water quality index, and Geographic Information System proved to be effective in assessing the suitability of surface water for drinking and supporting decision-making.
Article
Materials Science, Biomaterials
Diana Crista, Manuel Algarra, Maria Valle Martinez de Yuso, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: This study reports the synthesis of N-doped carbon dots obtained from the dry heating of solid mixtures of glucose and urea. The optical properties and composition of the carbon dots were investigated, and two types of carbon dots were found, one soluble in water and the other only soluble at basic pH.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Oncology
Amina El Mihyaoui, Saoulajan Charfi, El Hadi Erbiai, Mariana Pereira, Diana Duarte, Nuno Vale, Maria Emilia Candela Castillo, Alain Badoc, Ahmed Lamarti, Joaquim C. G. Esteves da Silva, Marino B. Arnao
Summary: Cancer is a major health concern worldwide, and phytochemicals are considered interesting molecules for the development of anticancer drugs. This study investigated the effects of extracts from the plant Cladanthus mixtus on human tumor cells. The extracts showed significant antiproliferative activity against cancer cell lines and a non-tumoral cell line. The aim was to identify bioactive compounds and evaluate the anticancer activity of the extracts.
Article
Microbiology
Alexandra Noites, Iara Borges, Bruno Araujo, Joaquim C. G. Esteves da Silva, Natalia M. de Oliveira, Jorge Machado, Eugenia Pinto
Summary: This study aimed to determine the antimicrobial activity of different parts and essential oils (EOs) of Chinese goldthread (Coptis chinensis), neem (Azadirachta indica), and manuka (Leptospermum scoparium) against prevalent microorganisms responsible for superficial infections. The results showed that C. chinensis EO and manuka EO exhibited some antifungal activity and had an effect against Propionibacterium acnes and Staphylococcus aureus. Neem EO showed activity against dermatophytes and P. acnes. Manuka EO demonstrated the broadest antimicrobial spectrum, showing activity against bacteria, yeasts, and dermatophytes, with greater activity against P. acnes and S. aureus.
Review
Chemistry, Multidisciplinary
Ines M. F. Cardoso, Luis Pinto da Silva, Joaquim C. G. Esteves da Silva
Summary: This review focuses on the critical analysis of nanocatalysts for advanced reductive processes (ARPs) and oxidation processes (AOPs) designed for the degradation of poly/perfluoroalkyl substances (PFAS) in water. The basic treatment technologies include ozone, ultraviolet, and photocatalyzed ARPs and/or AOPs. In addition to reviewing nanomaterials with great potential as catalysts for advanced PFAS processes in water, the perspectives for their future development considering sustainability are discussed. Moreover, a brief analysis of the current state of the art of ARPs and AOPs for PFAS treatment in water is presented.
Article
Chemistry, Multidisciplinary
El Hadi Erbiai, Patricia Gonzalez-Berdullas, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: In this study, the chemiluminescent properties of Coelenterazine and its two halogenated analogs were investigated. It was found that they exhibited a significant enhancement of light emission in aqueous solution, but almost no emission in aprotic solvents. Interestingly, Coelenterazine showed stronger light emission in aprotic solvents, while the chemiluminescence of the analogs was significantly quenched in water compared to methanol and aprotic solvents. These findings suggest that the observed quenching effect in water is attributed to Coelenterazine, rather than intrinsic enhanced emission of the analogs. Overall, we present Coelenterazine analogs that could be used for enhanced sensing of superoxide anion, providing valuable insights into this chemiluminescent system.
APPLIED SCIENCES-BASEL
(2023)
Article
Biology
El Hadi Erbiai, Benoutman Amina, Abbassi Kaoutar, Rabah Saidi, Zouhaire Lamrani, Eugenia Pinto, Joaquim C. G. Esteves da Silva, Abdelfettah Maouni, Luis Pinto da Silva
Summary: This study investigated the chemical characterization and antimicrobial properties of Ganoderma lucidum. The results showed that the methanolic extract of G. lucidum contained abundant phenolic and flavonoid compounds, exhibiting strong antioxidant and antimicrobial activities. These findings highlight the nutritional and medicinal significance of G. lucidum.
Article
Biochemistry & Molecular Biology
Carla M. Magalhaes, Tanja Ducic, Renato B. Pereira, Patricia Gonzalez-Berdullas, Jose E. Rodriguez-Borges, David M. Pereira, Joaquim C. G. Esteves da da Silva, Manuel Algarra, Luis Pinto da Silva
Summary: The mode of action of brominated Coelenteramine towards gastric cancer cells was investigated using synchrotron radiation-based FTIR spectroscopy. This method revealed that the anticancer activity of the compound is closely related to cellular lipids, impacting their organization and composition. Increased oxidative stress led to changes in membrane polarity, lipid chain packing, and lipid composition, which were not observed in noncancer cells, explaining its selectivity profile. Therefore, synchrotron radiation-based FTIR proved to be a powerful technique for studying the mechanism of anticancer drugs.
ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS
(2023)
Article
Green & Sustainable Science & Technology
Gabriela Rodriguez-Carballo, Ramon Moreno-Tost, Sonia Fernandes, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva, Eulogio Castro Galiano, Manuel Algarra
Summary: The effectiveness of different transition metal phosphate-based acid catalysts in the hydrothermal synthesis of carbon dots was evaluated. The existence of nanoparticles was confirmed regardless of the carbohydrate source. N-doped CDs with increased fluorescence were also synthesized and their photocatalytic activity was investigated. A Life Cycle Assessment revealed that the nature of the carbon precursor plays a decisive role in the environmental impact of the synthesis process.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Ricardo M. S. Sendao, Manuel Algarra, Eduarda Ribeiro, Mariana Pereira, Antonio Gil, Nuno Vale, Joaquim C. G. Esteves da Silva, Luis Pinto da Silva
Summary: In this study, the conjugation of carbon dots (CDs) with TiO2 nanoparticles was reported to prepare a photocatalytic nanocomposite for enhanced visible-light-driven photodegradation. The addition of CDs led to an increase in visible-light absorption and hindered the recombination of photogenerated charge carriers, resulting in a significant improvement in the catalytic performance of TiO2. The nanocomposites exhibited a different active species profile compared to bare TiO2, with superoxide radicals and hydroxyl radicals being the main active species. Additionally, a life cycle assessment showed that the nanocomposites had lower relative environmental impacts and the safety of the produced CDs was confirmed by in vitro assays. This study provides an important step towards the sustainable rational design of active visible-light-driven photocatalysts.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Multidisciplinary
Abhishek Kumar, Diana M. A. Crista, Ara Nunez-Montenegro, Joaquim C. G. Esteves da Silva, Santosh Kumar Verma
Summary: In this study, Eu2+/Dy3+ ions doped/co-doped into SrAl2O4 microparticles were synthesized through solid-state synthesis and ball milling. These particles exhibited a broad and long-persistent afterglow at the wavelength of 528 nm under broad excitation at around 400 nm. The luminescence intensity was optimized by selecting different annealing temperatures. Various characterization techniques were used to evaluate the preparation and application potential of these particles in latent fingermark detection. The persistence and stability of the particles were measured using a digital lux meter.
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)
