CRYSTENGCOMM
·
2020
·Vol. 22
·期 39
·6495-6501
·
IF 3.117
Jianmin Zhao,Hongkun Liu,Xiaodong Zhang,Bingbing Zhang,Ying Wang
The crystal structure of a new cesium trithiocyanurate compound, Cs4(HC3N3S3)2·4H2O, was determined by X-ray diffraction analysis. Cs4(HC3N3S3)2·4H2O crystallizes in the space group Pnma, with cell parameters a = 21.961(5) Å, b = 11.928(3) Å, and c = 8.903(2) Å. Its structure consists of crosswise arranged (HC3N3S3)2− units, and Cs+ cations and H2O molecules are located in the voids. The title compound was characterized by IR and UV–vis diffuse reflectance spectroscopy and thermal analysis. In addition, electrochemical impedance spectrum measurements were performed and revealed that the title compound exhibits proton conduction with the conductivity on the order of 10−4 S cm−1. The electronic structure and calculated optical anisotropy of Cs4(HC3N3S3)2·4H2O were also reported, which demonstrated that the compound exhibits a very large birefringence (Δn = 0.236@800 nm).
研究领域:
无机化学
·
材料科学
·
光学
·
电化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 18
·3121
·
IF 5.719
Zhangwei He,Runnan Yu,Wanrong Song,Yongshuai Gong,Hui Li,Zhan’ao Tan
Bismuth triiodide (BiI3) is a particularly promising absorber material for inorganic thin-film solar cells due to its merits of nontoxicity and low cost. However, one key factor that limits the efficiency of BiI3solar cells is the film morphology, which is strongly correlated with the trap states of the BiI3film. Herein, we report a coordination engineering strategy by using Lewis base dimethyl sulfoxide (DMSO) to induce the formation of a stable BiI3(DMSO)2complex for controlling the morphology of BiI3films. Density functional theory calculations further provide a theoretical framework for understanding the interaction of the BiI3(DMSO)2complex with BiI3. The obtained BiI3(DMSO)2complex could assist the fabrication of highly uniform and pinhole-free films with preferred crystallographic orientation. This high-quality film enables reduced trap densities, a suppressed charge recombination, and improved carrier mobility. In addition, the use of copper(I) thiocyanate (CuSCN) as a hole transport layer improves the charge transport, enabling the realization of solar cells with a record power conversion efficiency of 1.80% and a champion fill factor of 51.5%. Our work deepens the insights into controlling the morphology of BiI3thin films through the coordination engineering strategy and paves the way toward further improving the photovoltaic performances of BiI3solar cells.
研究领域:
材料科学
·
光伏技术
·
理论计算
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF FOOD SCIENCES AND NUTRITION
·
2019
·
IF 2.792
Yuanfeng Wu,Yuke Shen,Ye Zhu,Jothame Mupunga,Ligen Zou,Chao Liu,Shiwang Liu,Jianwei Mao
After consuming broccoli, isothiocyanates can be produced by the hydrolytic action of myrosinase from plant and/or microbiota. Using male C57BL/6 mice, the present study investigated the effects of broccoli ingestion on the myrosinase-like activity, NAD(P)H:quinone oxidoreductase 1 (NQO1) activity, diversity and composition of the gut microbiota. Compared with the control group, continuously feeding raw or hydrolysed broccoli increased the myrosinase-like activities of the colon and caecum contents, and also improved the NQO1 activity of the colon mucosa. Significant difference between the broccoli and control feeding groups were found. 16S rRNA gene sequencing indicated that broccoli ingestion profoundly affected the composition of the gut bacteria community. The correlation between the gut bacterial community composition and microbiota myrosinase-like activity was also studied. However, one type of glucosinolate, sinigrin, had no effect on these activities, indicating that broccoli component(s), other than glucosinolate, had increased the NQO1 and myrosinase-like activities.
研究领域:
营养学
·
微生物学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Food Analytical Methods
·
2018
·Vol. 12
·期 2
·517-525
·
IF 2.245
Li Weixia,Chen Ning,Huang Zhongping,Zeng Xiuqiong,Zhu Yan
Antibiotic residue has become a serious issue of food safety, due to the emergence of drug-resistant bacteria and their toxic side effects. Therefore, regarding the need, we herein report a rapid, sensitive, and selective switchable hydrophilicity dispersive solvent-based liquid-liquid microextraction (SHDS-LLME) method combined with high-performance liquid chromatography and UV detector for determining amphenicols in food products. In the off-line extraction procedure, the mixture of extraction solvent (butanol) and dispersive solvent (tetraethylenepentamine) was manually injected into the acidic aqueous sample solution. Specifically, after the fast neutralization reaction, the dispersive solvent was converted into water-soluble salt and phase separation was achieved. Under the optimal conditions, a good linearity was observed in the range of 0.27–50.0 μg kg −1 . The limit of detection for chloramphenicol (CAP) and thiamphenicol (TAP) were 0.03 and 0.08 μg kg −1 , respectively. Recoveries for the spiked samples obtained were between 81.5 and 113.5% and the relative standard deviation was less than 8.6%. The proposed method was successfully applied for the analysis of amphenicols in four food products.
研究领域:
分析化学
·
食品安全
·
药物残留检测
✓ 已验证
DOI
高影响因子
ACS Photonics
·
2022
·
IF 7.077
Zhongming Luo,Baoxing Liu,Ting Zheng,Xi Luo,Lei Lu,Bingbing Tian,Ping Xu,Hoi Sing Kwok,Guijun Li
The efficiency of blue perovskite light-emitting diodes (PeLEDs) is lagging far behind their green and red counterparts. Here, we demonstrate high-efficiency sky-blue PeLEDs by employing pseudohalide thiocyanates, which are ammonium thiocyanate (NH4SCN), methylammonium thiocyanate (MASCN), and guanidine thiocyanate (GASCN), as additives in a quasi-two-dimensional cesium lead halide perovskite emission layer. Although the thiocyanate incorporation can modify the formation energy to induce more n = 1 phases that are undesirable for light emission due to their strong electron–phonon coupling, the pseudohalide additive is able to passivate the nonradiative trap defects and stabilize the perovskite structure by filling the halide vacancy, coordinating to Pb with the Pb–S bond, and enhancing the bonding of the perovskite lattice. It is found that the passivation effect outperforms the electron–phonon coupling loss, yielding a higher photoluminescence quantum yield. As a result, the external quantum efficiencies of the sky-blue PeLEDs are improved from 5.75 to 11.93%. The thiocyanate-modulated devices also exhibit good spectral and operational stability. This work revealed the important roles of the pseudohalide thiocyanates in the improvement of sky-blue PeLEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Jian-Jie Gao,Bo Wang,Zhen-Jun Li,Jing Xu,Xiao-Yan Fu,Hong-Juan Han,Li-Juan Wang,Wen-Hui Zhang,Yong-Dong Deng,Yu Wang,Ze-Hao Gong,Yong-Sheng Tian,Ri-He Peng,Quan-Hong Yao
Industrial thiocyanate (SCN − ) waste streams from gold mining and coal coking have caused serious environmental pollution worldwide. Phytoremediation is an efficient technology in treating hazardous wastes from the environment. However, the phytoremediation efficiency of thiocyanate is very low due to the fact that plants lack thiocyanate degradation enzymes. In this study, the thiocyanate hydrolase module was assembled correctly in rice seedlings and showed thiocyanate hydrolase activity. Rice seedlings engineered to express thiocyanate degrading activity were able to completely remove thiocyanate from coking wastewater. Our findings suggest that transforming the thiocyanate hydrolase module into plants is an efficient strategy for rapid phytoremediation of thiocyanate in the environment. Moreover, the rice seedlings expressing apoplastic or cytoplasmic targeted thiocyanate hydrolase module were constructed to compare the phytoremediation efficiency of secretory/intracellular recombinant thiocyanate hydrolase. The most obvious finding from this study is that the apoplastic expression system is more efficient than the cytoplasm expression system in the phytoremediation of thiocyanate. At last, this research also shows that the secreted thiocyanate hydrolase from engineered rice plants does not influence rhizosphere bacterial community composition.
研究领域:
环境科学
·
代谢工程
·
植物生物技术
✓ 已验证
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
·
IF 4.153
Jian Tang,Xianghe Meng,Fei Liang,Kaijin Kang,Tixian Zeng,Mingjun Xia,Wenlong Yin,Zheshuai Lin,Bin Kang
Four novel cyanates BaCNOX (X = Cl, Br, I, and CNO) containing linear π-conjugated anions were obtained by solid-state metathesis reactions for the first time. BaCNOCl crystallizes in a monoclinic space group P21/m with a = 5.5757(15) Å, b = 4.4925(10) Å, c = 7.850(2) Å, β = 102.38(3)°, Z = 2, whereas the remaining three compounds belong to the same orthorhombic space group Pnma with a = 8.227–8.713 Å, b = 4.290–4.552 Å, c = 10.986–11.803 Å, Z = 4. The crystal structures of these four compounds are divergent, exhibiting rich structural diversity ranging from simple to complex when X changes from Cl to Br and I, and then to CNO. Their thermal, vibrational, and optical properties were characterized in detail. Besides, the first-principles calculations reveal that all four compounds show giant optical anisotropy of Δn > 0.20 at 800 nm owing to the superior arrangement of linear (CNO)− π-conjugated groups. Successful synthesis of these cyanates not only further explains the influence of microscopic ions on the structures, but also enriches the structure chemistry of cyanates and provides enlightenment for the study of birefringence in CNO-based compounds.
研究领域:
材料科学
·
晶体学
·
光学物理
·
理论化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）