MRS Communications
·
2022
·Vol. 12
·期 4
·460-464
·
IF 2.935
Xu Min,Chen Botong,Wang Qi,Zhang Yuan,Wang Yuhao,Duhm Steffen,Liu Lijia
Methylammonium lead halide perovskite (MAPbX 3 ) has been a great candidate for photovoltaic applications. However, dissociation of the methylammonium unit has been observed, producing a CH 3 – group binding to MAPbX 3 and a free NH 3 molecule. To date, there is no clear evidence on the specific binding site of CH 3 –. In this study, MAPbBr 3 thin films are prepared with deliberately added trimethyl lead bromide, (CH 3 ) 3 PbBr. X-ray photoelectron spectroscopy is applied to comparatively investigate the electronic structure of MAPbBr 3 films with and without (CH 3 ) 3 PbBr modification. CH 3 -Pb species are identified, confirming that Pb is a binding site for CH 3 produced upon MA dissociation. Graphical abstract
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2018
·Vol. 2018
·期 8
·1047-1052
·
IF 2.507
Xiaoxia Jia,Ning Yuan,Li Wang,Jiangfeng Yang,Jinping Li
Graphical Both high selectivity and adsorption capacity in the adsorptive separation of CO 2 , CH 4 , and N 2 were achieved by means of (CH 3 ) 2 NH functionalization of the unsaturated metal sites of the MOF Ni-HKUST-1. Ni-HKUST-1, with the same topological structure as Cu-BTC (HKUST-1), was synthesized by a (CH 3 ) 2 NH-assisted method. Ni-HKUST-1 with high purity (> 90 %), yield (85 %), and BET surface area (1088 m 2 /g) was successfully synthesized for the first time by using NiCl 2 . The pure-component adsorption isotherms of CO 2 , CH 4 , and N 2 on Ni-HKUST-1 were measured by the volumetric method and the data used to estimate the separation selectivity for CO 2 /CH 4 , CH 4 /N 2 , and CO 2 /N 2 binary mixtures according to the ideal adsorbed solutions theory. At 273 K and 1 atm, the selectivities for CO 2 /CH 4 , CH 4 /N 2 , and CO 2 /N 2 were 14.49, 5.36, and 183.41, respectively, and the adsorption capacities for CO 2 and CH 4 were 223.87 and 67.89 cm 3 /g, respectively. This is a rare demonstration of both high selectivity and adsorption capacity in the separation of CO 2 , CH 4 , and N 2 .
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Chengcheng Zhang,Jing Wang,Lina Che,Li Shi
Photocatalytic non-oxidative coupling of methane (NOCM) is an appealing approach to produce ethane and hydrogen, however, most developed photocatalysts still suffer from low activity. Here, we demonstrate that the crystal phase engineering of TiO2 via thermal annealing of Ti metal-organic frameworks (MOFs) can afford high photocatalytic NOCM performance in a flow reactor under UV-visible light irradiation. The characterization results show that engineering the TiO2 crystal phase can improve the separation efficiency of photogenerated charge carriers and promote the formation of •CH3 intermediate, thus achieving the improved performance of photocatalytic NOCM reaction. This research provides a new perspective towards the design and construction of efficient photocatalysts for NOCM reaction.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Biomaterials Science & Engineering
·
2018
·
IF 4.432
Meiyao Yang,Yingying Li,Wei Wang,Zhi Yuan,Yu Li
We report herein the development of a novel cellular cross-linker further employed in the construction of hepatocellular spheroids based on multivalent strategy. The linker structure consists of a glycyrrhetinic acid derivative (GA-N(CH3)2) modified alginate (ALG). GA-N(CH3)2 is selected as the recognition ligand due to its high affinity toward hepatocyte, whereas ALG represents the linear backbone accounting for its good biocompatibility and flexible structure. These features endow the cellular cross-linker with the ability to flexibly interact with the cell through multiple binding sites, providing superior binding force between the cell and cross-linker, and subsequently rapidly combining multiple cells into cellular spheroids.
研究领域:
生物材料
·
组织工程
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 1
·184
·
IF 4.6
Qirong Tian,Xinyang Sun,Chuan Li,Lei Shang,Rongna Ma,Xiaojian Li,Liping Jia,Shuijian He,Qian Zhang,Wei Zhang,Huaisheng Wang
Dopamine (DA) is an important catecholamine neurotransmitter and its abnormal concentration is closely related to diseases such as hypertension, Parkinson’s disease and schizophrenia. Due to the advantages of high sensitivity and fast response for electrochemiluminescence (ECL), developing ECL sensors for detecting DA was very critical in clinical diagnosis. ECL resonance energy transfer (ECL-RET) was an effective signaling mechanism. However, the shortage of highly efficient ECL-RET pairs impeded the development of DA sensors. Herein, methyl-modified perylene diimide derivative (PDI-CH3) self-assembly nanorod materials as luminophores and CuO nanomaterials as acceptors were integrated into nanocomposites. An obvious ECL-RET was found in PDI-CH3/CuO nanocomposites. After PDI-CH3/CuO nanocomposites were treated with DA, a large increase in ECL intensity was observed. Then, PDI-CH3/CuO nanocomposites were taken as an ECL platform to detect DA. This ECL sensor exhibited a linear response to DA from 10−12M to 10−8M with a limit of detection of 0.20 pM. Compared with other sensors for DA detection, the constructed ECL sensor exhibited higher sensitivity. In addition, the novel ECL sensor in this work showed good practicability in a human serum sample.
研究领域:
分析化学
·
生物医学工程
·
临床诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2019
·
IF 14.695
Zhong-Xia Wang,Yi Zhang,Yuan-Yuan Tang,Peng-Fei Li,Ren-Gen Xiong
Antiperovskites have developed to be one kind of important functional material over the past few decades, showing abundant physical properties such as negative thermal expansion and superconductivity, etc. However, antiperovskite ferroelectrics have scarcely been discovered in inorganic ceramics. In this article, we report a new organic–inorganic hybrid antiperovskite ferroelectric [(CH3)2(F-CH2CH2)NH]3(CdCl3)(CdCl4) based on the strategy of molecular design. The replacement of one methyl in [(CH3)3NH]CdCl3 with ethyl produces the lower symmetric [(CH3)2(CH2CH3)NH]CdCl3 with nonpolar perovskite structure, while the polar hexagonal antiperovskite structure with the formula of X3BA (where X = [(CH3)2(F-CH2CH2)NH]+, B = [CdCl3]−, and A = [CdCl4]2–) was received after further fluoridation of the ethyl group. Therefore, fluoridation successfully achieves the structural transformation from perovskite to antiperovskite, as well as the significant changes in physical properties from nonferroelectric to ferroelectric. The antiperovskite [(CH3)2(F-CH2CH2)NH]3(CdCl3)(CdCl4) exhibits typical ferroelectric phase transition above room temperature (Tc = 333 K) including thermal anomalies, dielectric transitions, and second harmonic generation (SHG) responses. Moreover, lower coercive fields and easy polarization switching are observed by the measurements of hysteresis loops and ferroelectric domains. The saturated polarization (Ps) of 4.0 μC/cm2 is almost 10 times as large as those recently discovered antiperovskite molecular ferroelectrics. This finding provides a novel strategy to design and explore more antiperovskite organic–inorganic hybrid ferroelectric materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jianghui Bai,Zhipeng Fan,Haitong Tang,Guangshe Li,Liping Li
Tunable multicolor luminescence materials can flexibly meet the needs of smart lighting, enabling efficient light energy use and minimizing waste. Lead-free hybrid double perovskites A2MIMIII(NO3)6 hold great potential in luminescence, benefiting from their tunable composition, high light absorption, low synthesis cost, and environmental friendliness. However, achieving tunable multicolor emission within a single matrix of these materials has yet to be realized. In this study, a series of [(CH3)4N]2KEu1–xTbx(NO3)6 single crystals have been synthesized using an environmentally friendly and mild aqueous solution evaporation method. The two emitter centers, Tb3+ and Eu3+, display energy transfer from Tb3+ to Eu3+. The emission color of the as-synthesized crystals gradually changes from red to orange, then to yellow, and finally to green with an increase of Tb3+ concentration, achieving yellow and green light emission in the three-dimensional rare-earth hybrid double perovskites for the first time. Green emission from [(CH3)4N]2KTb(NO3)6 displays the highest quantum yield at 87%. The millisecond-level emission decay time and high decomposition temperatures (365 °C) of [(CH3)4N]2KEu1–xTbx(NO3)6 single crystals highlight their potential for use in luminescent devices and phosphors, among other fields.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Bo Tong,Jiawei Wang,Zhenjie Liu,Lipo Ma,Peng Wang,Wenfang Feng,Zhangquan Peng,Zhibin Zhou
Formation of dendrite on lithium metal anode (LMA) poses a threat to commercial prospects of rechargeable lithium metal batteries (LMBs). Electrolyte engineering, including but not limited to using new solvents, salts and additives, is an effective remedy to surmounting this vexing problem. In this work, a novel additive, trimethylsilyl(fluorosulfonyl)( n -nonafluorobutanesulfonyl)imide {(CH 3 ) 3 Si-N[(FSO 2 )( n -C 4 F 9 SO 2 )], TMS-FNFSI}, is introduced to the ether-based electrolyte of LiN[(CF 3 SO 2 ) 2 ]-1,3-dioxolane/dimethoxyethane (LiTFSI-DOL/DME) for LMBs. It preferentially reduces on LMA prior to the main electrolyte components (ethers and LiTFSI), resulting in a LiF-rich, organic F- and Si-containing solid electrolyte interphase (SEI) film, being validated by X-ray photoelectron spectroscopy (XPS). Thus, dendrite growth is effectively suppressed. Li|Cu cells, with 1.0 M LiTFSI-DOL/DME (1:1, v/v) containing 5 wt% TMS-FNFSI, exhibit an average coulombic efficiency up to 96.5% for ca. 100 cycles at the current density and areal capacity of 1 mA cm −2 and 2 mAh cm −2 , respectively. The Li|Li symmetric cells with TMS-FNFSI can run for more than 1200 h with a stable polarization voltage (ca. 25 mV) at 0.5 mA cm −2 . The Li|LiFePO 4 cells with TMS-FNFSI can operate steadily for 100 cycles with capacity retention of 92% at 0.2 C. The reduction decomposition mechanism of TMS-FNFSI is tentatively proposed.
研究领域:
电化学
·
能源材料
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Qiuyue Zhou,Zhi-Qiang Wang,Zhinian Li,Junxing Wang,Minggao Xu,Shihui Zou,Jiuzhong Yang,Yang Pan,Xue-Qing Gong,Liping Xiao,Jie Fan
Methyl radicals (CH3•) are the key intermediates in the heterogeneous–homogeneous reaction processes of catalytic oxidative coupling of methane (OCM). Here, by applying in situ synchrotron-based vacuum ultraviolet photoionization mass spectrometry, we quantitatively detected CH3• being desorbed from various metal oxides and validated the CH3•-generating capability as an effective descriptor for the catalytic performance of the metal oxides in OCM. It is found that the C2 yield is linearly correlated to the amount and the desorption temperature of CH3•, with the better OCM catalyst showing stronger CH3• intensity and lower CH3• desorption temperature. Furthermore, experimental characterizations together with density functional theory calculations suggest that the intrinsic electronic properties of metals and the subsequent generated electrophilic oxygen species are the decisive factors for CH3• generation. Then, the CH3•-generating capability can bridge the gap between the OCM performance and the structure of the catalyst and help us better understand the intrinsic structure–performance relationship in OCM over metal oxide catalysts.
研究领域:
化学
·
催化科学
·
材料科学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2015
·Vol. 27
·期 35
·5176-5183
·
IF 17.493
Liu Y,Yang Z,Cui D,Ren X,Sun J,Liu X,Zhang J,Wei Q,Fan H,Yu F,Zhang X,Zhao C,Liu SF.
Two-inch-sized perovskite crystals, CH3 NH3 PbX3 (X=I, Br, Cl), with high crystalline quality are prepared by a solution-grown strategy. The availability of large perovskite crystals is expected to transform its broad applications in photovoltaics, optoelectronics, lasers, photodetectors, LEDs, etc., just as crystalline silicon has done in revolutionizing the modern electronics and photovoltaic industries.
研究领域:
材料科学
·
光电子学
·
光伏技术
·
晶体生长
·
半导体物理
✓ 已验证
DOI
PubMed
高影响因子
POLYHEDRON
·
2020
·
IF 2.343
Jian-Han Zhang,Zhi-Zhong Su,Ju-Xiang Luo,Yi Zhao,Hong-Gang Wang,Shao-Ming Ying
A mixed amines thiogermanate, namely (NH 4 ) 2 [NH 2 (CH 3 ) 2 ] 2 Ge 2 S 6 has been successfully synthesized by solvothermal reaction. Single crystal X-ray diffraction indicates the compound crystallizes in monoclinic space group P 2 1 / c with the lattice parameters: a = 6.9647(14) Å, b = 15.719(3) Å, c = 7.2042(14) Å, β = 92.76(3)°. The structure features a zero-dimensional [Ge 2 S 6 ] 4− anions which are separated by NH 4 + and [NH 2 (CH 3 ) 2 ] + . Hydrogen bond interactions play a crucial role in its structure formation. X-ray powder diffraction and TG-DSC measurements were performed to study its phase purity and thermal stability. UV–Vis diffuse reflectance spectroscopy coupled with Urbach fitting indicates an indirect optical transition semiconductor with a bandgap value of 3.50 eV. The result of first-principles electronic structure calculation supported the experimental indirect optical transition but the value was under estimated as 3.061 eV. Density of states and population analysis were also calculated to reveal the origin of the bandgap and bond interaction for its structure formation.
研究领域:
材料科学
·
晶体学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
He Zhao,Yingxuan Li,Bing Zhang,Tao Xu,Chuanyi Wang
Constructing a photocatalytic system for hydrogen generation is a promising means for producing clean and renewable energy. However, developing photocatalysts with high efficiency in a wide range of visible light is still a formidable challenge. Here, we report on a highly active system for photocatalytic hydrogen production from hydroiodic acid splitting that contains a soluble organic-inorganic hybrid PtI x /[(CH 3 ) 2 NH 2 ] 3 [BiI 6 ] as a newcomer photocatalyst for harvesting a wide range of visible light (up to 630 nm). Under irradiation at 465 nm, the photocatalytic system achieves apparent quantum yield of ~82.8% for photocatalytic hydrogen production along with a stable activity for at least 100 h. We propose that the superior photocatalytic performance is attributed to collisions between [BiI 6 ] 3− and Pt ions (Pt 2+ or Pt 4+ ), giving rise to efficient charge separation, which could be an effective approach towards designing and fabricating organic-inorganic semiconductors with improved performance in photocatalysis .
研究领域:
材料科学
·
能源化学
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）