Article
Chemistry, Multidisciplinary
Saket Jain, Saurabh Sandip Satpute, Raushan Kumar Jha, Mili Sanjeev Patel, Sangit Kumar
Summary: A new series of unsymmetrical phenyl tellurides derived from 2-N-(quinolin-8-yl) benzamide ligand has been synthesized by a copper-catalyzed method. These compounds have been transformed into corresponding unsymmetrical 2-N-(quinolin-8-yl)benzamide tellurium cations in order to enhance their Lewis acidity. These Lewis acidic tellurium cations have shown catalytic activities in the synthesis of substituted 1,2-dihydroquinolines and beta-amino alcohols under mild conditions. Mechanistic studies suggest that the enhanced Lewis acidity of tellurium center is responsible for these efficient catalytic activities.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Juliana Santos Barbosa, Gislene Batista, Sylvain Danto, Evelyne Fargin, Thierry Cardinal, Gael Poirier, Fabia Castro Cassanjes
Summary: Transparent fluorotellurite glasses were successfully prepared in the ternary system TeO2-Nb2O5-PbF2, allowing high incorporation of PbF2 without loss of glass forming ability. Compositions with higher PbF2 contents exhibit preferential precipitation of lead oxyfluoride at lower temperatures, which is controlled by a volume nucleation mechanism. Doping with Eu3+ promotes efficient nucleation and leads to transparent glass-ceramics with higher quantum efficiencies, making these new glass compositions promising hosts for luminescence applications in the middle infrared region.
Article
Materials Science, Multidisciplinary
Ryogo Nakamori, Naoki Kawano, Akito Takaku, Daisuke Nakauchi, Hiromi Kimura, Masaki Akatsuka, Kenji Shinozaki, Takayuki Yanagida
Summary: Eu3+-activated tellurite glasses were prepared for detecting high energy radiation, showing luminescence and scintillation properties with specific decay times. The scintillation peaks appeared under visible light, and the scintillation decay times were detected across a range with afterglow levels decreasing with an increase in Eu2O3 concentrations.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Ceramics
Chang-Bin Deng, Min Zhang, Ting Lan, Min-Jun Zhou, Yufeng Wen, Jiuping Zhong, Xin-Yuan Sun
Summary: Eu3+-doped tellurite glasses were prepared with optimal Eu2O3 content of 8 mol% (under 394 nm excitation) and 10 mol% (under X-ray excitation). These glasses showed red emission at 613 nm under X-ray excitation with a lifetime of about 0.725 ms, indicating potential detection application as a novel glass scintillator for slow events.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Ting Lan, Tiantian Han, Daguo Jiang, Yufeng Wen, Xin-Yuan Sun, Zhehao Hua, Sen Qian, Huiyun Ban, Hua Cai, Jifeng Han, Hui Liu, Shan Liu, Lishuang Ma, Laishun Qin, Jing Ren, Gao Tang, Zhigang Wang, ZhiLe Wang, Yao Zhu
Summary: The structural and luminescent properties of Eu3+-doped TeO2-GeO2-BaO scintillation glasses were studied. The results showed that an increase in TeO2 content led to a decrease in luminescent intensity and a slight increase in density. Therefore, a balance between luminescent efficiency and density requirement is necessary for scintillation applications.
Article
Materials Science, Multidisciplinary
Bulent Aktas, Abuzer Acikgoz, Demet Yilmaz, Serife Yalcin, Kaan Dogru, Nuri Yorulmaz
Summary: In this study, glass materials for radiation shielding were produced by adding different proportions of TeO2 to borosilicate glasses. The structural and physical properties of the glasses were investigated, and it was found that the sample containing 0.2 mol% TeO2 exhibited the best photon attenuation ability.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yinghui Shi, Minghui Zhang, Haibo Wang, Kun Chen, Weijie Deng, Jiansheng Xie, Yanzhuo Wang, Xiangyuan Wang, Jiabao Wan
Summary: A new mid-infrared tellurite ternary glass with small glass formation area was prepared using modified melt quenching. The glass has excellent performance and is a promising laser glass matrix material in the 2.0-2.7 μm band. The high-throughput, simple, and fast glass melting process allows for efficient exploration of the forming range of the glass.
Article
Materials Science, Multidisciplinary
Ziqi Han, Zhihong Liu, Qihou Li, Kai Wang, Zhiqian Yu, Longgong Xia
Summary: Two ternary compounds, Al2TeO6 and Al2Te2O7, have been found in the Al-Te-O system, and their decomposition behavior has been studied. The phase equilibrium of the Al2O3-TeO2 system has also been experimentally investigated.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Ceramics
Remi Piotrowski, Hasnaa Benchorfi, Jean-Paul Laval, Jean-Rene Duclere, Cecile Genevois, Pierre Carles, Sebastien Chenu, Maggy Colas, Julie Cornette, Philippe Thomas, Gaelle Delaizir
Summary: A crystallization study of the TeO2-InF3 glass system reveals a novel anti-glass phase stabilized by the specific glass composition 75TeO(2)-25InF(3). This unique crystalline phase, also known as a glass of anions, exhibits a coexistence of order and disorder, with a long-range cation order but a highly disordered anion sublattice. The thermal properties, structure, and microstructure of the parent glass and glass-ceramics have been investigated, along with the luminescence of Yb3+-doped glass-ceramics, confirming the presence of the disordered anti-glass phase.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2022)
Article
Materials Science, Ceramics
Tong Wu, Jiajia Hu, Kexuan Han, Chi Zhang, Menglin Li, Ruizhen Pang, Yu Hu, Dechun Zhou
Summary: Tb3+-doped bismuth tellurite glasses were prepared using a high-temperature melting method. The matrix glass exhibited higher thermal stability (ΔT = 102 °C) and lower maximum phonon energy (614 cm(-1)). Judd-Ofelt analysis based on absorption spectra revealed the spontaneous radiation transition probability (269.34 s(-1)) and fluorescence branching ratio (41.55%) of the D-5(4)->F-7(5) transition. The luminescence peaks of the samples were observed at 486 nm and 545 nm in the blue-green bands. The luminescence intensity increased with increasing Tb3+ concentration, reaching its maximum at 4mol% Tb4O7. Additionally, the calculated emission cross-section and gain coefficients in the blue wavelength range were 2.01 x 10(-22) cm(-1) and 2.92 cm(-1), respectively. Overall, Tb3+ doped bismuth tellurite glass holds potential for applications in blue-green communication.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Inorganic & Nuclear
Rosmita Borthakur, Vadapalli Chandrasekhar
Summary: This review focuses on compounds involving multiple bonds between boron and other heteroelements. It discusses various synthetic methods, spectroscopic features including NMR parameters, as well as single-crystal X-ray structural data and theoretical studies.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
Gharam A. Alharshan, Z. A. Alrowaili, Zakaria M. M. Mahmoud, I. O. Olarinoye, M. S. Al-Buriahi
Summary: This study investigates the effects of Nb2O5 inclusion on the optical, photon absorption, fast neutron moderation, and thermal neutron absorption features of glasses. The results show that increasing Nb2O5 content enhances the shielding efficiency of the glasses.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Physics, Condensed Matter
H. Cein Mandujano, Sandra L. Gonzalez, Nathan Episcopo, Uma Sitharaman, Narayan Poudel, Krzysztof Gofryk, Yahir E. Garay, Jorge A. Lopez, Qiang Zhang, Stuart Calder, Harikrishnan S. Nair
Summary: The Li-3((LiCr)(Te/Sb))O-6 compounds were studied using various techniques to characterize their crystal structure and magnetic properties, revealing specific heat anomalies and magnetic anomaly temperatures. The results suggest a scenario of short-range magnetic correlations as the magnetic ground states of these compounds.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Optics
Z. A. Alrowaili, Norah Alwadai, Canel Eke, Ali H. Alomari, I. O. Olarinoye, Chalermpon Mutuwong, S. Al-Qaisi, M. S. Al-Buriahi
Summary: This study investigated the radiation shielding properties of tellurite glasses. The mass attenuation coefficient, mass energy absorption coefficient, and effective atomic number were theoretically calculated for different compositions of glass. The results showed that glasses rich in BaO had higher absorption capabilities, making them potentially useful for gamma radiation absorption in systems and facilities.
Article
Materials Science, Multidisciplinary
Libin Mo, Lei Zhao, Chunlan Zhou, Guanghong Wang, Wenjing Wang
Summary: This study investigates the effects of different contents of TeO2 in glass frits on the sintering process and contact quality of Ag pastes on c-Si solar cells. The results show that an optimized TeO2 content of around 40% promotes the growth of Ag nanocrystallites, improves contact quality at Ag/Si interfaces, and enhances the densification and conductive performances of Ag grids. However, excessive TeO2 has a negative impact on the conductivity of Ag grids due to increased glass layer thickness.
Article
Materials Science, Multidisciplinary
Natalia A. Wojcik, Nagia S. Tagiara, Doris Moncke, Efstratios Kamitsos, Sharafat Ali, Jacek Ryl, Ryszard J. Barczynski
Summary: The electrical properties of beryllium-alumino-tellurite glasses and glass-ceramics doped with iron ions were investigated using impedance spectroscopy. The conductivity was found to be correlated with the concentration and valence states of iron ions. The conduction process in glasses was attributed to overlap polaron tunneling, while in glass-ceramics, quantum mechanical tunneling between semiconducting crystallites of iron oxides was proposed. The relationship between alumina dissolution and melt basicity was observed.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Rafaela Maria Giappa, Anastasios G. Papadopoulos, Emmanuel Klontzas, Emmanuel Tylianakis, George E. Froudakis
Summary: Water adsorption in metal-organic frameworks can be tuned by functionalization of their organic linkers to increase hydrophilicity. Functional groups with higher water affinities can form two hydrogen bonds with water molecules and enhance water uptake. Monte Carlo simulations showed that specific functional groups can increase the hydrophilicity of MOF and improve water uptake at relative humidity values up to 30%. The saturation water uptake exceeded 800 cm(3)/cm(3) for all candidates, classifying them as top performing materials for water harvesting.
Article
Materials Science, Ceramics
Konstantinos I. Chatzipanagis, Nagia S. Tagiara, Efstratios I. Kamitsos, Nathan Barrow, Ian Slagle, Robert Wilson, Tyler Greiner, Martha Jesuit, Nicholas Leonard, Aaron Phillips, Bryce Reynolds, Brock Royle, Katherine Ameku, Steve Feller
Summary: This study investigates the multi-spectroscopic properties of glasses with varying composition xPbO-(100-x)B2O3, and reveals the different bonding characteristics between lead and oxygen at different compositions, which play a crucial role in the structural evolution of the material.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
M. Milanova, L. Aleksandrov, A. Yordanova, R. Iordanova, N. S. Tagiara, A. Herrmann, G. Gao, L. Wondraczek, E. I. Kamitsos
Summary: The structure and luminescence properties of glasses with compositions 50ZnO:40B2O3:10WO3:xEu2O3, 0 <= x <= 10 mol% were studied using infrared, Raman and photoluminescence spectroscopic techniques. The physical properties of the glasses were also determined. The results indicate the efficiency of the 50ZnO:40B2O3:10WO3 glass structure for the luminescence performance of doped Eu3+ and suggest that these glasses are potential materials for red emission.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Thilo Grammes, Dominique de Ligny, Franziska Scheffler, Alina Nizamutdinova, Leo van Wuellen, Efstratios I. Kamitsos, Jonathan Massera, Delia S. Brauer
Summary: The structure of metaluminous aluminosilicate glasses in the SiO2-Al2O3-Na2O-P2O5 system was investigated, revealing the incorporation of phosphate into the network structure. Changes in phosphate content resulted in depolymerization of the network structure, while increasing silica content had a minimal effect on network polymerization. These changes correlated with variations in glass transition temperature and spectroscopic properties.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Anastasios G. Papadopoulos, Nagia S. Tagiara, Elissaios Stavrou, Fei Li, Guochun Yang, Efstratios I. Kamitsos
Summary: TeO2 glass was studied by Raman spectroscopy up to a record pressure of 70 GPa. The boson peak frequency cob decreased with partial differential cob/ partial differential P slope at 5-6 GPa, and reached a constant value above 30 GPa. The transformation of single Te-O-Te bridges to double Te-O2-Te bridges occurred under pressures up to 20 GPa, resulting in a more compact structure, while Raman activity at around 580 cm-1 indicated the increase of Te coordination from 4-fold to 6-fold at higher pressures.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Brian Topper, Doris Moncke, Randall E. E. Youngman, Christina Valvi, Efstratios I. I. Kamitsos, Christos P. E. Varsamis
Summary: The short-range order of binary zinc borate glasses was quantitatively described for the first time as a function of ZnO content. Multiple spectroscopic techniques were employed to reveal detailed structural information and a new model for quantifying the molar fractions of short-range order units was proposed. The study also provided insights into the intermediate nature of four-coordinated zinc in borate glasses of this series.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Ceramics
Brian Topper, Nagia. S. S. Tagiara, Dimitrios Palles, Felix Lind, Mourad Baazouzi, Mohamed Toufik Soltani, Lothar Wondraczek, Doris Moncke, Efstratios. I. I. Kamitsos
Summary: Electrothermal poling effectively induces second-order nonlinear effects in heavy-metal oxide antimonite glasses. The study reveals that the poling-induced second-harmonic generation intensity is influenced by the alkali type. X-ray photoelectron spectroscopy and spectroscopy analysis confirm the presence of different molecular units in the glass network. Raman spectroscopy line scans track structural changes on the anode side of poled glasses and show an increase in partially polymerized tungstate units.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Anastasios G. Papadopoulos, Nagia S. Tagiara, Elissaios Stavrou, Fei Li, Guochun Yang, Efstratios I. Kamitsos
Summary: TeO2 glass was investigated under Raman spectroscopy up to a record pressure of 70 GPa. The boson peak frequency ωb showed a decrease in the slope of partial differential ω b/ partial differential P at 5-6 GPa and saturated above 30 GPa with a constant value. Experimental and theoretical results suggest that pressures up to 20 GPa lead to the transformation of single Te-O-Te bridges to double Te-O2-Te bridges, resulting in a more compact structure. At higher pressures, Raman activity around 580 cm-1 indicates an increase in Te coordination from 4 to 6-fold.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
