SOLID STATE SCIENCES
·
2018
·
IF 1.861
Chuanling Sun,Yuandong Wu,Dajiang Mei,Thomas Doert
A new bismuth (III) iodate periodate , Bi 2 (IO 3 )(IO 6 ) was obtained from hydrothermal reactions using Bi(NO 3 ) 3 ·5H 2 O, and H 5 IO 6 as starting materials. Bi 2 (IO 3 )(IO 6 ) crystallizes in the monoclinic space group P 2 1 / c (No. 14) with lattice parameters ɑ = 8.1119(6), b = 5.4746(4), c = 16.357(1) Å, β = 99.187(2)°, V = 717.07(9) Å 3 , Z = 4. The structure of Bi 2 (IO 3 )(IO 6 ) features a three-dimensional framework which is a combination of [Bi(1)O 5 ] tetragonal pyramids, [Bi(2)O 8 ] bicapped trigonal prisms and [IO 3 ] − and [IO 6 ] 5− anions. Thermal analysis shows that the compound is thermally stable up to about 350 °C. The solid state UV-vis-NIR diffuse reflectance spectrum indicates that Bi 2 (IO 3 )(IO 6 ) is a semiconductor with a band gap of 2.76 eV.
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高影响因子
Materials Chemistry Frontiers
·
2024
·Vol. 8
·期 6
·1636-1642
·
IF 6
Dequan Jiang,Chen Li,Ting Wen,Ke Liu,Yingying Ma,En Chen,Tianyao Pei,Yonggang Wang
Exploring optoelectronic functional materials has been of growing interest, due to their potential applications in information and energy storage. Pressure, as a direct way of modulating the localized groups of materials, has the potential to induce significant changes in optoelectronic properties. Herein, we adopt the pressure method to synergistically modulate the configuration of dual functional groups in CsMoO3(IO3) (i.e., lone-pair electrons [IO3] and second-order Jahn–Teller [MoO6] groups). Under pressure, CsMoO3(IO3) undergoes an isostructural phase transition, resulting in multiple optoelectronic changes of the “colorless-to-brown” piezochromism, the second harmonic generation “on-to-off” transformation, and the enhancement of the photocurrent switching ratio (× ∼10 times). First-principles calculations are also employed to explain the structure–property relationship. This work will shed light on further advancements in functional materials with multiple optoelectronic properties in extreme environments.
研究领域:
材料科学
·
凝聚态物理
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无机化学
·
光学工程
·
应用物理学
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INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Yuan-Bin Fang,Rui-Biao Fu,Hong-Xin Tang,Qi-Rui Shui,Zu-Ju Ma,Xin-Tao Wu
Nonlinear-optical (NLO) crystal is an important photoelectric functional material. In this work, a new NLO titanium iodate, (H3O)2Ti(IO3)6, along with Ti(IO3)4 has been synthesized under facile conditions. The space group of (H3O)2Ti(IO3)6 is the chiral noncentrosymmetric group R3 (No. 146), with an interesting three-dimensional framework, while that of Ti(IO3)4 is the centrosymmetric space group P1̅ (No. 2) containing one-dimensional chains. Thermogravimetric analysis shows that (H3O)2Ti(IO3)6 and Ti(IO3)4 have no weight loss below 220 and 390 °C, respectively. In addition, (H3O)2Ti(IO3)6 not only is thermally stable up to 200 °C in an air atmosphere but also is stable in water. (H3O)2Ti(IO3)6 has a moderate-intensity second-harmonic-generation (SHG) response (1.4×KDP), a large laser-induced damage threshold (46×AgGaS2), and high transmittance in the wavelength ranges of 0.5–1.4 and 2.5–10 μm. Both local dipole moment and systematic theoretical calculations reveal that the SHG response of (H3O)2Ti(IO3)6 is mainly because of the combined effect of [TiO6] octahedra and IO3 and IO4 units. In a word, (H3O)2Ti(IO3)6 exhibits good NLO performances, as well as water resistance and facile growth of a single crystal with high quality, indicating its potential application as NLO materials in the visible and mid-IR regions, especially the visible region.
研究领域:
材料科学
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光学
·
晶体学
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高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 27
·10320-10326
·
IF 4.052
Ying-Jie Jia,Yi-Gang Chen,Ting Wang,Yao Guo,Xiao-Fang Guan,Xian-Ming Zhang
Two new alkali–metal bismuth iodates KBi(IO3)3(OH) (1) and NaBi(IO3)4 (2) have been synthesized by a hydrothermal method via tuning of alkali–metal ions. Compound 1 crystallizes in the space group P and features a [Bi(IO3)3(OH)]n chain with eight-membered Bi–O–I–O–Bi–O–I–O rings. The [Bi(IO3)3(OH)]n chain consists of paddlewheel-like dimeric Bi2(OH)2(IO3)4 units linked by IO3 pairs. Compound 2 in the polar space group Cc features a [Bi(IO3)4]− double layer with Bi4I4 eight-membered rings (8-MRs). NaBi(IO3)4 exhibits a strong second harmonic generation (SHG) response of ∼5.0 × KDP (KH2PO4) and a wide transmittance window (0.4–12 μm), and structure analyses and theoretical calculations reveal that polarization results mainly from the proper alignment of the IO3 groups. The calculated electronic structure based on the DFT method indicates that the BiOn and IO3 groups dominate their optical properties.
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CRYSTENGCOMM
·
2021
·Vol. 24
·期 1
·77-82
·
IF 3.545
Dandan Wang,Xiaoqing Jiang,Pifu Gong,Xinyuan Zhang,Zheshuai Lin,Zhanggui Hu,Yicheng Wu
An alkali metal gallium iodate, Cs3[Ga2O(I3O9)(IO3)4(HIO3)] (CGIO), was synthesized by the traditional hydrothermal method. Interestingly, CGIO revealed a novel I3O93− fundamental building block (FBB) constituted by two IO3 tetrahedrons and one IO5 polyhedron through sharing O atoms. The new I3O93− trimer forms a 0D [Ga2O(I3O9)(IO3)4(HIO3)]3− anion cluster together with the [Ga2O11]16− dimer and isolated IO3− units. The UV-vis-NIR diffuse reflectance spectrum of CGIO shows a wide bandgap of 4.05 eV, and the thermal stability could reach above 400 °C. First-principles calculations explicated that the optical properties of CGIO mainly originated from the iodate anion units with a calculated birefringence of 0.04 at 1064 nm.
研究领域:
无机化学
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材料科学
·
晶体学
·
物理化学
·
光学材料
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Small
·
2023
·Vol. 20
·期 3
·2306459
·
IF 13.3
Shuoxing Yang,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Nonlinear optical (NLO) crystals are indispensable for the solid-state lasers for their ability to expand wavelength spectral to the regions where the directing lasing is difficult or even impossible, yet the rational design of a high-performance NLO crystal remains a great challenge owing to the severe structural and properties’ requirements. Herein, a new noncentrosymmetric (NCS) and polar gallium iodate, LiGa(IO 3 ) 4 , with a novel 2D anionic layer, is successfully designed and synthesized by the aliovalent substitution strategy based on classic α-LiIO 3 . The 2D [Ga(IO 3 ) 4 ] ∞ − layer in LiGa(IO 3 ) 4 is built from the GaO 6 octahedra and highly polarizable units IO 3 . Compared with its parent compound, the partial replacement of A-site Li + cation with main group Ga 3+ cation facilitates LiGa(IO 3 ) 4 to possess excellent NLO properties, including the large second-harmonic generation (SHG) response (14 × KH 2 PO 4 (KDP) @ 1064 nm), wide bandgap (4.25 eV), large birefringence (0.23 @ 1064 nm), and wide optical transparency from UV to mid-IR. These reveal that LiGa(IO 3 ) 4 will be a promising NLO crystal.
研究领域:
材料科学
·
晶体工程
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INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Bing-Ping Yang,Chun-Li Hu,Fei-Fei Mao,Xiang Xu,Jiang-Gao Mao
Two new barium gold iodates, namely, BaAu(IO3)5 and HBa4Au(IO3)12, have been prepared. BaAu(IO3)5 crystallizes in the polar space group Pca21, whereas HBa4Au(IO3)12 crystallizes in the centrosymmetric space group P21/c. BaAu(IO3)5 consists of unique polar [Au(IO3)4]− anions whose four iodate groups are located at both sides of the AuO4 plane and the polarity points in the [001̅] direction. BaAu(IO3)5 displays strong second-harmonic-generation (SHG) effects about 0.6KTiOPO4 (KTP) and is phase-matchable. Thermal properties, optical spectra analyses, and theoretical calculations are also reported.
研究领域:
材料科学
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化学
·
物理学
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高影响因子
Chemistry-An Asian Journal
·
2020
·Vol. 15
·期 21
·3487-3493
·
IF 4.056
Feifei Mao,Jiadi Liu,Jinyu Hu,Hua Wu
Graphical By substituting two Ag + cations of Ag 2 Zr(IO 3 ) 6 by one La 3+ and two F − , LaZr(IO 3 ) 5 F 2 is formed via a 2 Ag + →La 3+ +2F − chemical cosubstitution. The introduction of F − into LaZr(IO 3 ) 5 F 2 resulted in a large band gap of 4.13 eV. Both compounds are birefringent materials with birefringences of ▵0.064 @1064 nm and 0.082 @1064 nm, respectively. Two mixed-metal zirconium iodates were prepared and studied as a case of chemical cosubstitution. The structure of Ag 2 Zr(IO 3 ) 6 ( P 2 1 /c ) features 0D [Zr(IO 3 ) 6 ] 2− anion group and 1D [Ag(IO 3 ) 2 ] − anionic chain, with the [Zr(IO 3 ) 6 ] 2− anion groups interconnected by Ag + ions into 3D network; LaZr(IO 3 ) 5 F 2 ( P 2 1 /n ) features 0D [Zr(IO 3 ) 5 F 2 ] 3− anion group and 2D [La(IO 3 ) 5 ] 2− anionic layer, with the [Zr(IO 3 ) 5 F 2 ] 3− groups interlinked by La 3+ ions into 3D structure. Notably, LaZr(IO 3 ) 5 F 2 is the first zirconium iodate fluoride reported. Wide optical band gaps of 3.77 and 4.13 eV are given for Ag 2 Zr(IO 3 ) 6 and LaZr(IO 3 ) 5 F 2 , respectively. Theoretical calculations confirmed that the weak d – d transition of Zr 4+ in the band structure leads to a moderate band gap of Ag 2 Zr(IO 3 ) 6 , and the introduction of F − into the zirconium iodate compound results in a large band gap of LaZr(IO 3 ) 5 F 2 . Both of the compounds are birefringent materials with birefringences of 0.064 @1064 nm and 0.082 @1064 nm, respectively.
研究领域:
无机化学
·
材料科学
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高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Qian-Ming Huang,Chun-Li Hu,Bing-Ping Yang,Ru-Ling Tang,Jin Chen,Zhi Fang,Bingxuan Li,Jiang-Gao Mao
The first polar alkaline-earth metal molybdenum iodate, Ba2[MoO3(OH)(IO3)2]IO3, with a Λ-shaped [MoO3(OH)(IO3)2]3– functional motif, was rationally designed. A zero-dimensional (0D) [MoO3(OH)(IO3)2]3– unit is derived from 0D [MoO2(OH)(IO3)3]2– polyanion through anionic mono-site substitution. Ba2[MoO3(OH)(IO3)2]IO3 possesses a strong phase-matchable second-harmonic-generation (SHG) response of approximately 8 times that of benchmark KH2PO4 (KDP), a broad transparent spectral region from near-ultraviolet to mid-infrared (0.29–10.6 μm), a large band gap of 3.78 eV, and a high laser-induced damage threshold (LDT) of 92.3 MW cm–2. The results suggest that Ba2[MoO3(OH)(IO3)2]IO3 can be potentially applied in the mid-infrared nonlinear optical field. Theoretical calculations demonstrate that the large SHG response of the title compound originates mainly from the Λ-shaped [MoO3(OH)(IO3)2]3– functional unit. From multisite substitution to mono-site substitution, this work provides a more generic route to synthesize SHG materials.
研究领域:
材料科学
·
晶体化学
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 38
·21084-21091
·
IF 2.936
D. Zhang,X. Y. Liu,H. T. Zhao,L. Yang,T. Lü,M. Q. Jin
Radioactive iodine is quite mobile in soil and poses threats to human health and the ecosystem. Many materials, including layered double hydroxides (LDH), have been synthesized to successfully capture iodine from aqueous environments. However, limited information is available on the application of LDH in soil to immobilize iodine species. In the present study, the feasibility of using Mg–Al–NO3 LDH for retention of soil iodate (IO3−) in both batch and column systems was analyzed. The 2 : 1 Mg–Al–NO3 LDH exhibited the greatest removal efficiency of IO3− from aqueous solution, compared with 3 : 1 and 4 : 1 Mg–Al–NO3 LDH. The Mg2–Al–NO3 LDH demonstrated a strong affinity for IO3−, with a high sorption capacity of 149 528 mg kg−1 and a Freundlich affinity constant KF of 21 380 L kg−1. The addition of Mg2–Al–NO3 LDH in soil resulted in significant retention of IO3− in both the batch and column experiments. The affinity parameter KF of soil with the addition of 1.33% Mg2–Al–NO3 LDH was 136 L kg−1, which was 28.6 times higher than soil without LDH added. Moreover, the eluted iodate percentage was only 12.9% in the soil column with the 1.33% Mg2–Al–NO3 LDH addition, whereas almost 43.5% iodate was washed out in the soil column without LDH addition. The results suggested that Mg2–Al–NO3 LDH could effectively immobilize iodate in soil without obvious interference.
研究领域:
环境科学
·
放射性污染控制
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yong Chen,Huiping Zeng,Jiaxin Xu,Dong Li,Jie Zhang
Currently, there are well-operated iron removal water plants in the northeast region of China. Among them, the backwash process produces a large amount of iron-containing sludge (IS) year by year, which can cause some harm to the environment if not treated. The main form of existence for IS is amorphous γ-FeOOH, and this work demonstrates that IS is a natural and highly active catalyst for periodate(PI). Moreover, IS showed strong stability in environmental factor effects and reproducibility experiments. EPR with quenching experiments proved that IS could activate PI to produce •OH, O 2 •− , 1 O 2 , and IO 3 • . In the degradation experiments where methylene blue was chosen as the model pollutant, IO 3 • , and 1 O 2 were the substances that served the prominent role in degradation. This work provides an inexpensive and feasible way to dispose of waste iron-containing sludge from water plants and provides fundamental insights into the degradation mechanism of organic pollutants through the activation of PI by IS.
研究领域:
环境科学
·
化学工程
·
废水处理
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 14
·4423-4428
·
IF 4
Xue-Ying Zhang,Xiao-Han Zhang,Bing-Ping Yang,Jiang-Gao Mao
A new alkaline earth–rare earth iodate, Ba2Ce(IO3)8(H2O), has been synthesised by a hydrothermal method and its structure has been determined by single-crystal X-ray diffraction. Ba2Ce(IO3)8(H2O) crystallises in the polar space group Pna21 (No. 33) with unit cell parameters of a = 15.5042(5) Å, b = 7.8841(3) Å, c = 19.5359(8) Å, V = 2388.00(15) Å3, and Z = 4. The structure of Ba2Ce(IO3)8(H2O) is characterised by zero-dimensional (0D) [Ce(IO3)8(H2O)]4− units separated by Ba2+ cations. Large crystals of Ba2Ce(IO3)8(H2O) with dimensions of a few millimetres have been grown. The UV-vis-NIR transmission spectroscopy measurements of the compound showed that it has a short wavelength absorption edge at 381 nm. Ba2Ce(IO3)8(H2O) exhibits a relatively weak second-harmonic-generation (SHG) response, about 0.2 times that of KDP, which is mainly due to the fact that the polarisation effects of the IO3 groups in the structure largely cancel each other out. The relationships between the structure and the physical properties of Ba2Ce(IO3)8(H2O) have also been calculated theoretically. Ba2Ce(IO3)8(H2O) has a band gap of 2.44 eV, which is determined by the Ce–O and I–O interactions and is larger than those of many simple metal iodates. The introduction of alkaline earth metals favours an increase in band gap. Our work shows that the SHG and birefringence properties are closely related to the arrangement of the functional groups in the compounds.
研究领域:
化学
·
材料科学
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高影响因子
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