APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Chitengfei Zhang,Liuyi Cai,Rong Tu,Yingqiu Zheng,Bao-Wen Li,Song Zhang
Due to its nontoxicity, suitable bandgap, high defect tolerance and high electron mobility, layered BiI 3 has been gaining attention in photoelectric device and nonlinear optics field. However, the growth of large-size single crystal 2D BiI 3 has not been achieved. Herein, the synthesis of single crystal 2D BiI 3 on mica substrate via a cooling-induced growth method is reported, with the thickness of 8 ∼ 1000 nm and a lateral dimension of 110 ∼ 1000 μm. X-ray diffraction and selected area electron diffraction demonstrate the single crystal nature of 2D BiI 3 flakes. The high temperature during heat preservation step prevents the deposition of BiI 3 vapor, and then, when proceeding to cooling-induced growth step, single crystal 2D BiI 3 flakes start to nucleate on colder mica substrate and grow up to ∼ 1000 μm (lateral dimension) rapidly. The stability test indicates the 2D BiI 3 flake decomposes with the present of both O 2 and water. Finally, the cooling rate, height of crucible, holding temperature and type of substrate have also been investigated to show the structural evolution of 2D BiI 3 flakes.
研究领域:
材料科学
·
凝聚态物理
·
纳米材料
·
晶体生长
·
光电器件
✓ 已验证
DOI
高影响因子
TETRAHEDRON
·
2024
·
IF 2.1
Biyun Su,Qi Zhang,Paison Faida,Dou Yang,Liqin Ding,Boli Hou
The Schiff base condensation reaction was adopted to synthesize a series of pyridine-based quinoxaline ligands ( L1, L2, L3, L4 ) using 2-acetylpyridine and 1,2-phenylenediamine aromatic amines with different substituents of –OCH 3 , –F, -Cl, -Br. Then, four symmetrical dinuclear metal complexes ( 1–4 ) were obtained by coordination reaction of the synthesized ligands with CoCl 2 ·6H 2 O, and six unexpectedly systematic and novel solvent-involved asymmetric mononuclear metal complexes ( 1A-4A, 3B, 4B ) were obtained during single crystals cultivating by solvent diffusion method. The microscopic composition of the complexes were proved by a series of characterizations such as elemental analysis, IR and UV–vis. At the same time, by improving the single crystal culture technology, full crystal sample of compounds was obtained and X-ray single crystal diffraction showed a rare single crystal to single crystal structure transition (SCSC) phenomenon in this study. Furthermore, the catalytic properties of the complexes for MMA polymerization was explored, it was found that the catalytic activity of complexes 1–4 containing different types of substituents on pyridyl quinoxaline ligand was in the order of 1 < 2 < 3 < 4 , indicating that the complex with an electron-withdrawing substituent showed the higher activity than that of electron-donating substituent. Complexes 1A-4A, 3B and 4B showed higher catalytic activity in MMA polymerization than 1–4 , which confirmed that the catalytic activity of mononuclear complexes were generally higher than that of binuclear complexes.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Li Zhong,Junyang Ding,Xian Wang,Lulu Chai,Ting-Ting Li,Kongzhao Su,Yue Hu,Jinjie Qian,Shaoming Huang
The rapid development of suitable and cheap water oxidation catalysts is of great significance in energy conversion and storage. In this context, herein we have synthesized two different types of metal–organic frameworks (MOFs, denoted as BMM-11 and BMM-12) constructed from the same metal salts (cobalt nitrate) and organic linkers (H4BPTC) at the similar solvothermal conditions. Interestingly, we learned that both crystalline materials can be conveniently converted into each other by a single-crystal-to-single-crystal transformation method at their corresponding synthetic conditions. Meanwhile, we applied them directly as electrocatalysts into OER application where the pure BMM-11 and BMM-12 can achieve a stable current density of 10 mA cm–2 with an overpotential of 0.362 and 0.393 V, respectively, during which MOF degradation unexpectedly occurs. After electrolysis, the following microscopic, spectroscopic, as well as electrochemical measurements confirm that these initial MOF precursors are rapidly transformed into the mixed phases of CoOxHy species consisting of CoOOH and Co(OH)2, which are essentially active components for OER performance. Finally, we have also considered other strategies to improve MOF-derived composites in oxygen evolution activity, including bimetallic doping and physical grinding strategy. The approach described here can further be extended to other cobalt-based MOFs-derived electrocatalysts for water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Hao Zong,Min Wang,Weinan Chen,Zhong-Da Zhang,Jia-Wei Cai,Cong Shen,Li-Xing Li,Shui-Long Kang,Yuan Fang,Gang Zhou,Sui-Dong Wang
A comprehensive comparison of organic single crystals based on a single material but with different dimensions provides a unique approach to probe their carrier injection mechanism. In this report, both two-dimensional (2D) and microrod single crystals with the same crystalline structure of an identical thiopyran derivative, 7,14-dioctylnaphtho[2,1-f:6,5-f′]bis(cyclopentane[b]thiopyran) (C8-SS), are grown on a glycerol surface with the space-confined method. Organic field-effect transistors (OFETs) based on the 2D C8-SS single crystal exhibit superior performance compared with those based on the microrod single crystal, particularly in their contact resistance (RC). It is demonstrated that the resistance of the crystal bulk in the contact region plays a key role in RC of the OFETs. Thus, among the 30 devices tested, the microrod OFETs typically appear contact-limited, whereas the 2D OFETs possess significantly reduced RC arising from the tiny thickness of the 2D single crystal. The 2D OFETs show high operational stability and high channel mobility up to 5.7 cm2/V·s. The elucidation of the contact behavior highlights the merits and great potential of 2D molecular single crystals in organic electronics.
研究领域:
材料科学
·
有机电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yi-Yu Liao,Jian-Rong Li,Bo Zhang,Hai-Yan Sun,Wen Ma,Jian-Ce Jin,Mei-Ling Feng,Xiao-Ying Huang
It is imperative yet challenging to efficiently sequester the 137Cs+ ion from aqueous solutions because of its highly environmental mobility and extremely high radiotoxicity. The systematical clarification for underlying mechanism of Cs+ removal and elution at the molecular level is rare. Here, efficient Cs+ capture is achieved by a thioantimonate [MeNH3]3Sb9S15 (FJSM–SbS) with high capacity, fast kinetics, wide pH durability, excellent β and γ radiation resistances, and facile elution. The Cs+ removal is not significantly impacted by coexisting Na+, K+, Ca2+, Mg2+, and Sr2+ ions which is beneficial to the remediation of Cs+-contaminated real waters. Importantly, the mechanism is directly illuminated by revealing an unprecedented single-crystal to single-crystal structural transformation upon Cs+ uptake and elution processes. The superior Cs+ removal results from an unusual synergy from strong affinity of soft S2– with Cs+, easily exchangeable [MeNH3]+ cations, and the flexible and robust framework of FJSM–SbS with open windows as trappers.
研究领域:
材料科学
·
环境科学
·
放射化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Dong-Yang Li,Jun-Hua Song,Zi-Yan Xu,Yu-Jia Gao,Xu Yin,Yu-Han Hou,Li-Juan Feng,Cheng-Yang Yue,Honghan Fei,Xiao-Wu Lei
Hybrid metal halides are an emerging class of highly efficient photoluminescent (PL) materials. However, very few of them show reversible on–off PL switching under external stimuli and have the potential to perform as next-generation intelligent materials with applications in cutting-edge photoelectric devices. Herein, we report single crystal-to-single crystal (SC–SC) structural and PL transitions among three 0D hybrid antimony halides, namely, nonemissive α-[DHEP]SbCl5 (1), yellow-emissive β-[DHEP]SbCl5·2H2O (2), and red-emissive β-[DHEP]SbCl5 (3), by a dynamic phonon-engineering strategy. The reversible SC–SC transformation between 1 and 2 is triggered by acetone or methanol, affording the reversible PL on–off switching. The transition between yellow-emissive and red-emissive solids is achieved by the reversible SC–SC transformation between 2 and 3 through the process of removal/adsorption of guest water molecules. Meanwhile, the 3 to 1 transition is performed by the introduction of methanol, which is accompanied by the quenching of red emission. Therefore, a triple-mode reversible PL off–onI–onII–off switching is realized in metal halide hybrids for the first time, including the off–onI (yellow), color-tunable onI–onII (yellow-red), and onII–off (red) modes. More importantly, the reversible PL switching in 0D hybrid antimony halides make them suitable for successful applications in the protection and anti-counterfeiting of confidential information as well as in optical logic gates.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 36
·5442-5459
·
IF 3.474
Yan-Fang Feng,Qi Tang,Kai-Liang Luo,Ji-Qing Wu,Zhong Zhang,Yu-Ning Liang,Fu-Pei Liang
A systematic investigation on the assembly of a flexible zwitterionic ligand, 1,3-bis(2-carboxyethyl)benzimidazolium (HL), with various Cu(II) salts under different conditions afforded nine coordination compounds: [Cu2L2(NO3)2]·CH3CN (1), [Cu2L2(H2O)2](NO3)2·5H2O (2), {[CuL(H2O)](NO3)}n (3), [Cu4L4(OH)2(H2O)2](NO3)2·10H2O (4), [Cu2L2(H2O)2](ClO4)2 (5), [CuL(H2O)3]2SO4·7H2O (6), [Cu(HL)2Cl2] (7), [Cu2L2Cl2]·2H2O (8) and {[Cu2L2Cl2]·2H2O}n (9). Compounds 1 and 8 are neutral paddle-wheel shaped dinuclear clusters with either nitrate or chloride as the axial ligand, while 2 and 5 are composed of identical [Cu2L2(H2O)2]2+ cationic units displaying a paddle-wheel motif with an axially coordinated aqua ligand but different counter anions. Compound 3 exhibits a 1D linear structure, where two adjacent Cu(II) centers are triply bridged via two carboxylate groups plus one aqua ligand. Compound 4 is a tetranuclear cluster supported by two μ3-bridged OH− groups and four carboxylate bridges. Compounds 6 and 9 are mononuclear species constructed from the dicarboxylate ligand in two different coordination modes. Compound 9 assumes a 1D looped chain topology with paddle-wheel cluster nodes propagated by pairs of flexible linkers. A close examination revealed that the conformational freedom of the flexible dicarboxylate ligand as well as the labile binding modes of its two side arm carboxylates is sensitive to the reaction conditions, thus resulted in the different structural types of these coordination compounds. The solvent-induced reversible single crystal-to-single crystal (SCSC) transformation between 1 and 3 could be easily achieved via the shuttle movement of NO3− outward and inward of the Cu(II) coordination sphere accompanied by a visible color change. Upon dissolution–recrystallization, the irreversible or reversible structural transformations among 2, 3, 4 and 6 could be driven by subtly controlling some factors such as solvent, pH, temperature and counter anion. The magnetic measurements for compounds 2–4 demonstrated that their magnetic behaviors are governed by antiferromagnetic interactions despite the fact that dissimilar exchange coupling pathways between neighboring Cu(II) ions are available in these three compounds.
研究领域:
配位化学
·
材料科学
·
晶体工程
✓ 已验证
DOI
高影响因子
Research
·
2023
·
IF 11
Jian-Qiang Zhao,Yue-Yu Ma,Xue-Jie Zhao,Yu-Jia Gao,Zi-Yan Xu,Pan-Chao Xiao,Cheng-Yang Yue,Xiao-Wu Lei
Intelligent stimuli-responsive fluorescence materials are extremely pivotal for fabricating luminescent turn-on switching in solid-state photonic integration technology, but it remains a challenging objective for typical 3-dimensional (3D) perovskite nanocrystals. Herein, by fine-tuning the accumulation modes of metal halide components to dynamically control the carrier characteristics, a novel triple-mode photoluminescence (PL) switching was realized in 0D metal halide through stepwise single-crystal to single-crystal (SC-SC) transformation. Specifically, a family of 0D hybrid antimony halides was designed to exhibit three distinct types of PL performance including nonluminescent [Ph3EtP]2Sb2Cl8 (1), yellow-emissive [Ph3EtP]2SbCl5·EtOH (2), and red-emissive [Ph3EtP]2SbCl5 (3). Upon stimulus of ethanol, 1 was successfully converted to 2 through SC-SC transformation with enhanced PL quantum yield from ~0% to 91.50% acting as “turn-on” luminescent switching. Meanwhile, reversible SC-SC and luminescence transformation between 2 and 3 can be also achieved in the ethanol impregnation–heating process as luminescence vapochromism switching. As a consequence, a new triple-model turn-on and color-adjustable luminescent switching of off–onI–onII was realized in 0D hybrid halides. Simultaneously, wide advanced applications were also achieved in anti-counterfeiting, information security, and optical logic gates. This novel photon engineering strategy is expected to deepen the understanding of dynamic PL switching mechanism and guide development of new smart luminescence materials in cutting-edge optical switchable device.
研究领域:
材料科学
·
光学工程
·
化学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 34
·期 2
·2106400
·
IF 30.849
Wenjie Wang,Yao Wang,Runze He,Xiaozheng Wang,Zheng Shen,Xiaocang Han,Alicja Bachmatiuk,Wen Wen,Mark H. Rümmeli,Pan Liu,Mengqi Zeng,Lei Fu
Single-crystal-to-single-crystal (SCSC) transformations have received considerable interest in crystal engineering, owing to providing a key platform for creating new materials. However, because of the limited tolerance of chemical bonds against the lattice strains, it is challenging to maintain the crystallinity when the structure changes dramatically. Here, a peculiar SCSC transformation from organic crystals to inorganic crystals, simultaneously achieving a drastic change in structure, connectivity, and dimension, is reported. As a demonstration, after reacting with liquid gallium, zeolitic imidazolate framework-8 (ZIF-8) can easily transform to 2D hydroxide single crystals. Interestingly, long-range ordered metallic atoms of hydroxide inherited from the ordered atomic arrangement of ZIF-8, but the connectivity is distinct. With good universality and extensibility, this transformation vastly expands the research scope of the SCSC transformations and provides a novel pathway for the synthesis of crystalline materials.
研究领域:
晶体工程
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 8
·1324
·
IF 5.719
Limin Ou,Shengheng Nong,Ruoxi Yang,Yaoying Li,Jinrong Tao,Pan Zhang,Haifu Huang,Xianqing Liang,Zhiqiang Lan,Haizhen Liu,Dan Huang,Jin Guo,Wenzheng Zhou
Compared with the polycrystalline system, the single-crystalline ternary cathode material has better cycle stability because the only primary particles without grain boundaries effectively alleviate the formation of micro/nanocracks and retain better structural integrity. Therefore, it has received extensive research attention. There is no consistent result whether tungsten oxide acts as doping and/or coating from the surface modification of the polycrystalline system. Meanwhile, there is no report on the surface modification of the single-crystalline system by tungsten oxide. In this paper, multirole surface modification of single-crystalline nickel-rich ternary cathode material LiNi0.6Co0.2Mn0.2O2by WO3is studied by a simple method of adding WO3followed by calcination. The results show that with the change in the amount of WO3added, single-crystalline nickel-rich ternary cathode material can be separately doped, separately coated, and both doped and coated. Either doping or coating effectively enhances the structural stability, reduces the polarization of the material, and improves the lithium-ion diffusion kinetics, thus improving the cycle stability and rate performance of the battery. Interestingly, both doping and coating (for SC-NCM622-0.5%WO3) do not show a more excellent synergistic effect, while the single coating (for SC-NCM622-1.0%WO3) after eliminating the rock-salt phase layer performs the most excellent modification effect.Keywords:nickel-rich NCM;single-crystalline;surface modification;WO3
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Omega
·
2022
·
IF 4.132
Qingxin Liu,Yinglan Wu,Min Feng,Wanmin Chen,Zhiping Zheng
Silver complexes with proteinogenic amino acid ligands are of interest for biomedical and antimicrobial applications. In this work, we obtained {[Ag7(l-his)4](NO3)3·3H2O}0.2{[Ag8(l-his)4(H2O)2](NO3)4·3H2O}0.8 (1) and {[Ag7(d-his)4](NO3)3·3H2O}0.2{[Ag8(d-his)4(H2O)2](NO3)4·3H2O}0.8 (2), which represent the first example of any Ag-exclusive complex featuring a cluster-type core motif and with only proteinogenic amino acid ligands. Upon immersion into acetonitrile, an interesting single-crystal-to-single-crystal transformation occurred to produce a new cluster complex of the formula [Ag8(l-his)4(NO3)(H2O)](NO3)3 (3). Using a racemic mixture of histidine, the reaction under otherwise identical conditions led to the production of the second example of a three-dimensional (3D) network structured Ag-exclusive complex with only a proteinogenic amino acid ligand. Compared with other Ag–histidine complexes in the literature, the significance of reaction conditions, particularly the Ag/histidine ratio and pH of the reaction mixture, is revealed. Temperature-dependent emission of 1 and 2 at 440 nm characteristic of silver–philophilic interactions was also observed.
研究领域:
无机化学
·
生物医学
·
材料科学
✓ 已验证
DOI
高影响因子
Nature Chemistry
·
2023
·
IF 21.8
Yu Baoqiu,Lin Rui-Biao,Xu Gang,Fu Zhi-Hua,Wu Hui,Zhou Wei,Lu Shanfu,Li Qian-Wen,Jin Yucheng,Li Jing-Hong,Zhang Zhenguo,Wang Hailong,Yan Zier,Liu Xiaolin,Wang Kang,Chen Banglin,Jiang Jianzhuang
Single-crystal X-ray diffraction is a powerful characterization technique that enables the determination of atomic arrangements in crystalline materials. Growing or retaining large single crystals amenable to it has, however, remained challenging with covalent organic frameworks (COFs), especially suffering from post-synthetic modifications. Here we show the synthesis of a flexible COF with interpenetrated qtz topology by polymerization of tetra(phenyl)bimesityl-based tetraaldehyde and tetraamine building blocks. The material is shown to be flexible through its large, anisotropic positive thermal expansion along the c axis ( α c = +491 × 10 –6 K –1 ), as well as through a structural transformation on the removal of solvent molecules from its pores. The as-synthesized and desolvated materials undergo single-crystal-to-single-crystal transformation by reduction and oxidation of its imine linkages to amine and amide ones, respectively. These redox-induced linkage conversions endow the resulting COFs with improved stability towards strong acid; loading of phosphoric acid leads to anhydrous proton conductivity up to ca. 6.0 × 10 −2 S cm −1 .
研究领域:
材料科学
·
化学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）