JOURNAL OF APPLIED PHYSICS
·
2014
·Vol. 115
·期 4
·
IF 2.185
Wang Pei,He Duanwei,Xu Chao,Ren Xiangting,Lei Li,Wang Shanmin,Peng Fang,Yan Xiaozhi,Liu Dongqiong,Wang Qiming,Xiong Lun,Liu Jing
Angle-dispersive synchrotron X-ray diffraction measurements were performed on vaterite-type YBO 3 /Eu 3+ , GdBO 3 , and EuBO 3 , respectively, up to 41 GPa at room temperature using a diamond-anvil cell. Pressure-induced amorphization was observed in hexagonal GdBO 3 with a significant compression along the c -axis. Compared to the ions of the distorted GdBO 3 phase, its anions may lose their long-range order prior to the cations at high pressures. Based on the experimental pressure-volume data, the obtained bulk moduli of YBO 3 /Eu 3+ and GdBO 3 are 329 and 321 GPa, respectively, which are more than 90% larger than that of EuBO 3 (167 GPa) and are presumably attributed to Gd 3+ and Y 3+ with a high density of d valence electrons.
研究领域:
材料科学
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物理学
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DOI
高影响因子
ANALYST
·
2020
·Vol. 146
·期 2
·590-596
·
IF 3.978
Mei Gao,Man He,Rang Xing,Xuefei Wang,Zhuo Wang
Quercetin has been proved to have high medicinal value, and as a type of flavonol, has been found in many plants. A simple, fast and effective detection of quercetin was developed according to the fluorescence enhancement by modified carbon dots (PBA-CDs). PBA-CDs were prepared by connecting phenylboronic acids (PBA) on the surface of carbon dots rich in amino groups. Due to the selective interactions of PBA with the cis-diol groups of quercetin and the additional hydrogen bonds, the intermolecular rotation of quercetin was inhibited, and then the fluorescence significantly increased. The selectivity of this method was proved and the linear ranges were estimated to be 0–28.5 μM with a limit of detection at 28.8 nM. Using this method, the quercetin content in the Ginkgo biloba leaf was measured as 42.28 mg·g−1. In addition, the PBA-CDs hold excellent biocompatibility and have demonstrated their ability to detect quercetin in living cells.
研究领域:
分析化学
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植物科学
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生物技术
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Yifan Li,Sifan Wang,Jiangbo Chen,Huan Zhou
Boron-containing brines are widely distributed in nature, and within the pH range of salt lakes, B4O72– is one of the primary boron forms. To express the brine properties and phase equilibrium behavior of boron-containing brine systems, experiments and thermodynamic research based on the eNRTL framework were carried out. Tetraborate aqueous systems are focused in this study: (1) the phase diagram data of K2B4O7–K2SO4–H2O and K2B4O7–K2SO4–KCl–H2O systems at 298.15 and 323.15 K were experimentally determined; (2) the heat capacity of the B4O72– ion was determined via simultaneously fitting the thermodynamic property and solubility data of Li2B4O7, Na2B4O7 and K2B4O7 aqueous systems; (3) the liquid parameters (interaction parameters between water–ionic pair and ionic pair–ionic pair) and solid parameters (ΔfGk°, ΔfHk°, ΔCp,k°) for three binary systems (Li2B4O7–H2O, Na2B4O7–H2O, K2B4O7–H2O) and two ternary systems (K2B4O7–K2SO4–H2O, K2B4O7–KCl–H2O) were determined by fitting the multitemperature phase diagram data; and (4) the complete structures of the phase diagram for the ternary and quaternary systems were predicted. The results demonstrate that (1) the models can effectively describe the solution properties and solid–liquid phase equilibrium behavior of tetraborate-containing aqueous systems, (2) the parameters exhibit thermodynamic consistency, and (3) the predicted complete phase diagram is reasonable.
研究领域:
化学
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地球科学
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环境科学
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DOI
高影响因子
Chemical Science
·
2025
·
IF 7.4
Yue-Wen Zhou,Ming-Yang Jia,Jun-Lei Yang,Qinlei Liu,Zhenfeng Cai
The influence of electric fields (EFs) on chemical reactions has attracted significant interest due to their ability to modulate reaction rates, pathways, and selectivity. Although EFs have been experimentally demonstrated to facilitate various reactions, clearer evidence for their role in covalent condensation has remained limited. Herein, we provide experimental evidence of electric-field-induced covalent condensation of boronic acids, utilizing the strong EFs at the air-liquid interface of microdroplets to induce the reaction. Microdroplet-based chemistry provides interfacial electric field intensities as high as ca. 109 V/m, offering a robust platform for the systematic investigation of boronate linkage formation and subsequent condensation of boronic acids. Our results confirm the role of EFs in facilitating room-temperature condensation of boronic acids, providing direct insights into the electric-field-induced polymerization process and presenting an experimental approach for investigating these processes in solution.
研究领域:
化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xuebin Lian,Yuanjian Li,Penghui Li,Yilin Jin,Xinyu Zhao,Jiangwen Li,Dehuan Kong,Shujun Zhao,Shuangfei Xiang,Feiya Fu,Xiangdong Liu
The problems of strength–toughness trade-off and stability–switchability conflict make it a huge challenge to integrate exceptional adhesion and desired recycling performances into a single system. Inspired by wood cellulose molecular chain structure, a parallel-ordered dynamic boronic esters cross-linking network is presented by using 4-dimethylaminopyridine as a countercation stabilizing the boron center to induce boric acid to form ionic spiroborate linkage with linear hydroxyl-decorated epoxy polymer. The ionic spiroborate polymer network has a high cross-linking degree to contribute to structural stability and adhesion strength. Moreover, the unique ionic spiroborate bond cooperates with the parallel-ordered structure, providing a highly effective path and a rapid exchange rate and thus affording excellent closed-loop recycling properties. Given the effects, a superior adhesion strength of 30.86 ± 0.74 MPa is found along with an excellent debonding work of 64929 N m–1. Also, adhesives show excellent environmental reliability. In addition, the prepared adhesives exhibit good chemical/physical recyclability and display 106.8% conservation of adhesion strength after 3 bonding and debonding tests. This work provides a strategy to construct high-performance adhesives that combine robust adhesion and recyclable properties.
研究领域:
材料科学
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高分子化学
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胶粘剂技术
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可持续化学
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Dongbo Chen,Nian Fu,Yufeng Chang,Yu-e Shi,Zhenguang Wang
The construction of afterglow materials with full-color tunable emissions is attractive but still a challenging task. Herein, a host–guest doping strategy was proposed to produce afterglow materials with an emission-color span of almost 210 nm (from blue to deep red) by heat treating the aqueous mixture of arylboronic acids and boric acid (BA). In-depth structural, photophysical, and theoretical studies revealed that the heat treatment process resulted in the dehydration of BA and the formation of a glassy state host, and arylboronic acids were loaded as guest molecules through H-bonds and covalent bonds with BA. The afterglow originated from arylboronic acids, and the afterglow color of products was related to their degree of conjugation of aromatic groups. The host–guest doping strategy significantly improved the photophysical performances of arylboronic acids, achieving a photoluminescence quantum yield as high as 81.7% and an emission lifetime of 2.90 s (afterglow >22 s). Triple information encryption based on emission lifetime and color-encoding was also achieved, demonstrating their commercial potential for use in anticounterfeiting and information storage.
研究领域:
材料科学
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光物理学
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2021
·
IF 3.178
Tao Zhang,Lan Yang,Dan Li,Lingzong Meng,Yafei Guo,Tianlong Deng
The pH values, solubilities and water activities in the system LiB(OH) 4 –NaB(OH) 4 –H 2 O at 323.15 K were investigated. The mole fractions of boron species were calculated in the aqueous borate solutions, and the distribution and relevant mechanism were also discussed. The solubility diagrams in the ternary system were drawn at 323.15 K. The phase diagram consists of two single salt regions for LiB(OH) 4 and NaB(OH) 4 ·2H 2 O, one invariant point co-saturated with the above salts. On the basis of the Pitzer model, the Pitzer binary parameters and mixing parameters were fitted with the water activities, saturated vapour pressure and solubilities in the ternary system. The dissolution equilibrium constants ( K sp) of LiB(OH) 4 and NaB(OH) 4 ·2H 2 O were calculated using the experimental solubility data. The calculated solubilities with the parameters and K sp agree well with the experimental data.
研究领域:
物理化学
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热力学
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产品关联
DOI
高影响因子
Journal of Analytical Methods in Chemistry
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2019
·
IF 1.589
Xiaoxia Liu,Miaomiao Tian,Wenmei Gao,Jinzhong Zhao
An efficient, sensitive, and low-cost method has been developed for turn-on fluorescence sensing of dopamine (DA). The method relies on the rapid reaction of DA and 3-Hydroxyphenylboronic acid (3-HPBA) via specific recognition between boronic acids and cis-diol of DA in alkaline solution. The reaction product shows an excitation wavelength of 417 nm and the maximum emission peak at 470 nm. The proposed method allows the determination of DA in the range of 50 nM–25 μM, and the whole detection can be completed within 5 minutes. Furthermore, the presented approach has good selectivity and has been successfully applied to DA sensing in human serum samples, showing great potential in clinical diagnosis.
研究领域:
分析化学
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生物医学
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临床诊断
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DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 14
·2775-2780
·
IF 4.3
Jin Shanxia,Li Yaqin,Yang Liuquan,Li Wei,Zhou Ping
The affinity interactions between boronic acids and sugars have been successfully exploited in many fields, such as the sensing of saccharides, selective enrichment of glycoconjugates, and drug delivery. However, despite multiple techniques having been adopted to investigate the reaction of boronate affinity, the pathway of boronate esters formation under aqueous conditions remains controversial. We report a MALDI-MS approach to investigate the interactions between phenylboronic acid and monosaccharides in neutral aqueous solution by using polylevodopa as an innovative substrate instead of conventional matrix. A series of unusual tri-benzeneboronic esters were then revealed. The mass spectrometry data indicate that they bear a dibenzenepyroboronate cyclic ester moiety with seven-membered ring or eight-membered ring. With the aid of theoretical computations, their most likely geometrical structures are elucidated, and these tri-benzeneboronic esters are proposed to be formed via a boroxine binding monosaccharide pathway. This work provides more insight into the mechanism of boronate affinity interaction between boronic acid and sugars and proves the developed MALDI-MS approach is promising for studying interactions between small molecules. Graphical Abstract
研究领域:
分析化学
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理论化学
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糖化学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2020
·
IF 2.888
Sa-Ying Li,Pan Liang
Two alkaline-earth metal borates BaZn 2 B 2 O 6 with NLO property and Ba 2 Cd(B 3 O 6 ) 2 with birefringent property have been synthesized and characterized by XRD, FT-IR, and chemical analysis. The molar enthalpies of solution of BaZn 2 B 2 O 6 (s) and Ba 2 Cd(B 3 O 6 ) 2 (s) in 2.00 mL of 1 mol·dm −3 HCl(aq) were measured by microcalorimeter at T = 298.15 K, respectively. The molar enthalpies of solution of CdCl 2 ·2.5H 2 O(s) and ZnO(s) in the mixture solvent of 2.00 mL of {1 mol·dm –3 HCl + H 3 BO 3 + Ba(OH) 2 ·8H 2 O} (aq) were also measured, respectively. With the incorporation of the previously determined enthalpies of solution of H 3 BO 3 (s) in 2.00 mL of 1 mol· dm –3 HCl (aq), Ba(OH) 2 ·8H 2 O) in the mixture solvent of (2.00 mL of 1 mol·dm −3 HCl + H 3 BO 3 ) (aq), together with the standard molar enthalpies of formation for CdCl 2 ·2.5H 2 O(s)/ZnO(s), Ba(OH) 2 ·8H 2 O(s), H 3 BO 3 (s), HCl (aq) and H 2 O (l), the standard molar enthalpies of formation of – (2703.0 ± 2.2) kJ·mol −1 for BaZn 2 B 2 O 6 (s) and – (5625.26 ± 5.1) kJ·mol −1 for Ba 2 Cd(B 3 O 6 ) 2 at T = 298.15 K were obtained on the basis of the appropriate thermochemical cycles.
研究领域:
无机化学
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物理化学
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Pan Liang,Jie Wang,Zhi-Hong Liu
A pure zinc borate, Zn[B 12 O 14 (OH) 10 ], has been synthesized and characterized by XRD, FT-IR, simultaneous TG-DTA techniques, and chemical analysis. The molar enthalpy of solution of Zn[B 12 O 14 (OH) 10 ] (s) in 1 mol·dm −3 HCl(aq) was measured by microcalorimeter at T = 298.15 K. The molar enthalpy of solution of ZnO(s) in the mixture solvent of 2.00 cm 3 of 1 mol·dm −3 HCl(aq) and calculated amount of H 3 BO 3 was also measured. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol·dm −3 HCl(aq), together with the use of the standard molar enthalpies of formation for ZnO(s), H 3 BO 3 (s), and H 2 O(l), the standard molar enthalpy of formation of −(9646.6 ± 9.6) kJ·mol −1 at T = 298.15 K was obtained on the basis of an appropriate thermochemical cycle. In addition, the molar enthalpy of formation of −9492.7 kJ·mol −1 for [B 12 O 14 (OH) 10 ] 2− has also been estimated by a group contribution method, which has been used to predict the Δ f H m θ of a series of transition metal borates of M[B 12 O 14 (OH) 10 ] (M II = Mn, Zn, Fe, Co, Ni). These estimated data have been used to further compare the stability of this series of transition metal borates.
研究领域:
无机化学
·
物理化学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Yucheng Hao,Linbo He,Guangjie Ge,Quanzheng Zhang,Ningjing Luo,Shuping Huang,Haijian Li,Evgeny V. Alekseev
Investigation of the Pt-B-O system reveals the first magnesium platinum borate Mg 3 Pt(BO 3 ) 2 O 2 obtained from the high temperature flux method. The compound crystallizes in the centrosymmetric monoclinic space group C 2/ m (no. 12) with the lattice parameters of a = 16.8073(8) Å, b = 3.10610(1) Å, c = 5.2107(2) Å, and β = 90.546(4)° (Z = 2). The crystal structure of Mg 3 Pt(BO 3 ) 2 O 2 is based upon isolated BO 3 triangles and PtO 6 and MgO 6 octahedra . The PtO 6 octahedra are connected with each other in an edge-sharing manner forming one dimensional (1D) chains. Each of the PtO 6 octahedra links with two BO 3 units to form anionic [Pt(BO 3 ) 2 O 2 ] 6- chains along the b -axis. MgO 6 octahedra are arranged in the form of two dimensional (2D) layers. The 2D MgO 6 layers are further connected by the anionic [Pt(BO 3 ) 2 O 2 ] 6- chains into the 3D framework structure of Mg 3 Pt(BO 3 ) 2 O 2 . The material was experimentally and theoretically characterized in regards to its optical and spectroscopic properties.
研究领域:
材料科学
·
晶体学
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DOI
高影响因子
危险品化学品经营许可证（带存储）