Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 27
·10017-10026
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IF 8.067
Jinchao Qiao,Xin Gao,Jianjun Liu,Qiang Zhou,Longhai Zhong,Kaiyuan Liu,Yunfei Li,Pengwan Chen
In this study, well-crystallized black phosphorus nanosheets are obtained via shock-induced phase transformation. Red phosphorus powder is filled in a sample container and subjected to high shock pressure and temperature using a shock-driven flyer. Moreover, flyer impact velocity is adjusted to investigate the influence of shock pressure and temperature on the phase transformation of red phosphorus. The recovered black samples are characterized via multiple techniques, such as X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy and atomic force microscopy. The characteristic results demonstrate the presence of black phosphorus nanosheets with a lateral size of 0.5–20 μm and a thickness of 1.5–50 nm. Moreover, the results also confirm the critical influence of the shock pressure on the micromorphology of the recovered samples. The increase of shock pressure thickens the formed black phosphorus nanosheets and decreases their lateral size. In addition, the formation mechanism of black phosphorus nanosheets by shock-induced phase transformation of red phosphorus is carefully analyzed. This research provides a new method to prepare gram-scale black phosphorous nanosheets through shock treatment for the first time.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2022
·
IF 4.198
Lei Xu,Zheng Dong,Qi Zhang,Ning Deng,Shi-Yu Li,Hua-Jian Xu
The versions of Miyaura borylation and protoboration of alkynes catalyzed by low loadings of palladium (400 mol ppm = 0.04 mol %) have been developed. These transformations have a broad substrate scope, good functional-group compatibility, and gram-scale synthetic ability.
研究领域:
有机化学
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催化化学
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2019
·Vol. 12
·期 7
·1733-1738
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IF 8.515
Dong Lvming,Chen Zhuo,Ye Lei,Yu Yan,Zhang Jianbing,Liu Huan,Zang Jianfeng
Mn-doped all-inorganic perovskite quantum dots (QDs) provide prominent applications in the fields of low-cost light source or display, because of their remarkable properties including dual-color emission and reduced lead content, as well as high photoluminescence quantum yields (PLQYs) and high stability. However, the existing synthesis approaches usually require hash conditions, such as high temperature and nitrogen protection, which is a major hurdler for the practical manufacturing. In addition, the significantly high Mn substitution ratio in CsPbX 3 QDs is still challenging. The real dual-color emission with two strong emission peaks in the Mn-doped all-inorganic perovskite QDs has attracted great interest. Here we present a gram-scale approach to synthesize both CsPb x Mn 1− x Cl 3 and CsPb 1− x Mn x Cl y Br 3− y QDs at 100 °C in the air with high Mn substitution ratio, up to 55.64% atomically. The as-prepared CsPb 1− x Mn x Cl y Br 3− y QDs exhibit high PLQYs of 62.41% and dual-color emission with two strong emission peaks around at 400–450 nm and 600 nm, respectively. The enhanced peak at 400–450 nm is a result of the hybrid halides in CsPbBr x Cl 3− x host. Furthermore, the unique advantage of the optical emission and high PLQYs properties of the CsPb x Mn 1 − x Cl 3 QDs has been demonstrated as invisible ink for encryption applications and polymer composites. Our gram-scale synthesis approach for Mn-doped all-inorganic perovskite QDs may boost the future research and practical applications of QDs-based white LED, spintronics, and molecular barcoding.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
TETRAHEDRON LETTERS
·
2018
·Vol. 60
·期 5
·402-406
·
IF 2.125
Xingquan Xiong,Chao Yi,Xu Liao,Shilin Lai
A series of 5-substituted-1 H -tetrazoles have been efficiently synthesized in moderate to excellent yields (68–90%) under mild reaction conditions by combining aryl aldehydes, hydroxylamine hydrochloride with sodium azide in the presence of catalytic amount of Cu(OAc) 2 in deep eutectic solvent (DES). The new synthetic method has many advantages, such as high conversion, green reaction medium, easy work-up, low cost, and environment friendly.
研究领域:
有机化学
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药物化学
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绿色化学
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合成方法学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Jinze Lan,Liang Luo,Maomao Wang,Fan Li,Xiaoxia Wu,Fu Wang
CsPbX 3 (X = Cl, Br, I) perovskite colloids have attracted considerable attention because of their excellent optical properties , low-threshold lasing, and multicolor electroluminescence . Much work on synthesis and application of CsPbX 3 have been performed in the past several years. In this study, a novel robust one-pot synthesis method of CsPbBr 3 nanocrystals (NCs) was developed, in which all the precursors are heated together in a flask. Gram-scale CsPbBX 3 NCs with a fluorescence quantum yield of around 77% was achieved in a few minutes. A green light-emitting diode (LED) was fabricated by coasting CsPbBr 3 NCs on the surface of an industrially available blue chip. The fabricated LED emitted bright-green light with high color purity. This method provides a simple and efficient method for the large-scale preparation of high-quality CsPbBr 3 NCs, and might pave the way for their practical applications in green LEDs.
研究领域:
材料科学
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纳米技术
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光电
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2018
·
IF 4.155
Zhang Feng,Xiao Changtao,Li Yunfei,Zhang Xin,Tang Jialun,Chang Shuai,Pei Qibing,Zhong Haizheng
Reprecipitation synthesis has been demonstrated to be a simple and convenient route to fabricate high quality perovskite quantum dots toward display applications, whereas the limited chemical yields (< 10%) and difficulty of purification limited its further application. In order to overcome this issue, we here report a modified emulsion synthesis by introducing phase transfer strategy, which achieving effective extraction of newly formed perovskite quantum dots into non-polar solvent and avoiding the degradation of perovskite quantum dots to a large extent. Based on this strategy, gram-scale CH3NH3PbBr3 quantum dots were fabricated in 10 mL (~0.02 mol/L) colloidal solution with chemical yields larger than 70%. The as fabricated CH3NH3PbBr3 quantum dots exhibit an emission peak of 453 nm and a full width at half maximum of only 14 nm. Moreover, electroluminescent devices based on blue emitting CH3NH3PbBr3 quantum dots were also explored with a maximum luminance of 32 cd/m2, showing potential applications in blue light emitting devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Lulan Xiao,Qianqi Li,Zheng Wang,Zongshang Li,Wensheng Wang,Jishi Wei,Hui Ding
Multicolor afterglow carbon dots (CDs) have significant application potential in information encryption, anti-counterfeiting, and optoelectronics. However, achieving afterglow CDs with a high quantum yield (QY) across the visible spectrum using a one-step, solvent-free route on a large scale remains a formidable challenge. In this work, a series of CDs-based composites with tunable full-color afterglow (454–602 nm), high QY (30.4–20.6 %), long lifetime (169–416 ms) and high production yield (64–78 %) were successfully synthesized on a gram scale by thermally heating a solid mixture of boric acid (BA), salicylic acid, acrylamide, and rhodamine B (RhB). Comprehensive characterizations revealed that the blue-to-green afterglow originates from room-temperature phosphorescence (RTP) activated by the B 2 O 3 matrix and that emission tunability is attributed to the quantum size effect. Furthermore, the yellow-to-red tunable afterglow, belonging to delayed fluorescence (DF), results from in situ Förster resonance energy transfer (FRET) between the phosphorescent CDs and the increasing content of rhodamine B moieties anchored on the CD surfaces. This work demonstrates an efficient and environmentally friendly synthesis strategy for producing full-color afterglow CDs on the gram scale and highlights their promising applications in anti-counterfeiting, information encryption, and organic optoelectronic devices.
研究领域:
材料科学
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纳米技术
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光学功能材料
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分子发光
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防伪技术
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信息加密
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有机光电子学
✓ 已验证
产品关联
DOI
高影响因子
STAR Protocols
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2022
·
IF 0
Cong Niu,Jianjing Yang,Kelu Yan,Jiafang Xie,Wei Jiang,Bingwen Li,Jiangwei Wen
Here, we present a protocol to decyanopyridate inert N-heterocycles access to N-fused heterocycles via the mechanism of dual proton-coupled electron transfer (PCET). We describe a detailed guide to performing an electrochemical gram-scale protocol for decyanopyridation of inert N-heterocycles. The desired pyridylated quinolone is synthesized in a 5.0 mmol scale with a yield of 76%. The protocol is limited to cyanopyridines. For complete details on the use and execution of this protocol, please refer to Niu et al. (2022) .
研究领域:
有机化学
·
电化学
·
合成化学
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DOI
PubMed
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Li Min,Zhou Yang,Wen Zexing,Ni Qian,Zhou Ziqin,Liu Yiling,Zhou Qiang,Jia Zongchao,Guo Bin,Ma Yuanhong,Chen Bo,Zhang Zhi-Min,Wang Jian-bo
Despite the broad potential applications of C -glycosides, facile synthetic methods remain scarce. Transforming glycosyltransferases with promiscuous or natural O -specific chemoselectivity to C -glycosyltransferases is challenging. Here, we employ rational directed evolution of the glycosyltransferase MiCGT to generate MiCGT-QDP and MiCGT-ATD mutants which either enhance C- glycosylation or switch to O -glycosylation, respectively. Structural analysis and computational simulations reveal that substrate binding mode govern C -/ O -glycosylation selectivity. Notably, directed evolution and mechanism analysis pinpoint the crucial residues dictating the binding mode, enabling the rational design of four enzymes with superior non-inherent chemoselectivity, despite limited sequence homology. Moreover, our best mutants undergo testing with 34 substrates, demonstrating superb chemoselectivities, regioselectivities, and activities. Remarkably, three C -glycosides and an O -glycoside are produced on a gram scale, demonstrating practical utility. This work establishes a highly selective platform for diverse glycosides, and offers a practical strategy for creating various types of glycosylation platforms to access pharmaceutically and medicinally interesting products.
研究领域:
生物化学
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酶工程
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
ChemNanoMat
·
2019
·Vol. 6
·期 2
·258-266
·
IF 3.431
Yunwei Wei,Ruijia Sun,Yuehua Li,Yuhai Zhang,Yizhong Lu,Xiaoming Li,Guozhu Chen,Bingqiang Cao,Cuncheng Li,Haibo Zeng
The preparation of luminescent Cs 4 PbBr 6 perovskite solids with current methods either needs a complex procedure, or needs a variety of ligands, and a combination of good solvents and anti-solvents. The potential environmental risks are inevitable when they are produced in large scale. Herein, an environmentally friendly route for the mass production of luminescent Cs 4 PbBr 6 perovskite solids using a single solvent under ambient conditions is presented. Gram-scale Cs 4 PbBr 6 perovskite solids are produced within tens of minutes using a small amount of DMF, specifically, 4 mL DMF solution can produce over 10 g products per batch. Because no ligands and anti-solvents are utilized in the whole procedures, the ligand-free Cs 4 PbBr 6 perovskite solids are facilely harvested after the evaporation of solvent. More importantly, the solvent vapor can be recovered and reutilized, which can eliminate the environmental pollution caused by organic solvent. The experimental results revealed that the solvent, reaction time, and PbBr 2 /CsBr molar ratios are crucial for the formation of Cs 4 PbBr 6 perovskite solids and their luminescent performances. Such Cs 4 PbBr 6 perovskite solids exhibit strong green PL emission, high PL quantum yield and reversible fluorescent response towards heat and light, which enable them to be suitable for applications in optoelectronic devices.
研究领域:
材料科学
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化学
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纳米技术
·
环境科学
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DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Yang Xu,Yuxin Liu,Hongliang Han,Zhanfang Ma
Superhydrophilic metal–organic frameworks (MOFs) are ideal materials for many applications in an aqueous environment, such as catalysis, drug delivery, and pollute absorption. However, current approaches fail to provide either an efficient way to enhance inside aqueous diffusion or a facile method for mass production. Here, aiming at the above issues, we presented a guest-mediated strategy to rapidly produce superhydrophilic MOFs in gram scale, based on the interaction between polarized polyoxometalate guests and hydrophobic channels. Experimental observation and theoretical simulation show that the assembled guests induced aqueous diffusion into channels, promoting water transportation. The confirmatory biocatalytic application indicated enhanced water filtration and mass transfer in MOFs, which was manifested by efficient substrate conversion in biological buffers. Because this strategy was generally valid to a variety of MOFs, it would unleash the potential of MOFs in an aqueous environment and bring many possibilities to this field.
研究领域:
材料科学
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化学工程
·
催化
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Ruohao Dong,Haoran Du,Yixuan Sun,Kuangfu Huang,Wen Li,Baoyou Geng
The design and synthesis of high-performance catalysts for oxygen evolution reaction (OER) are crucial for electrocatalysis reaction. In this study, the new Ag-decorated Co-based hydroxides nanosheets with good performance as well as gram-scale yield are prepared by a selective reduction–oxidation method in virtue of the different stability of metal in air. The doping of silver obviously raises the electrical conductivity of the catalysts. Due to the synergistic reaction of the high electrical conductivity and the original active sites, the overpotential of the as-prepared Ag-decorated Co(OH)2 nanosheets is as low as 270 mV at 10 mA/cm2. Compared to the pure Co(OH)2 nansheets, the overpotential decreased about 80 mV at the same current density. Especially, different from the general preparation methods, this process can be carried out at room temperature and does not need any strict condition. And the gram-scale output gives this method potential for industrial production.
研究领域:
电化学
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催化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）