ChemistrySelect
·
2024
·Vol. 9
·期 1
·e202303510
·
IF 1.9
Zhuoer E. Cai,Xiu-Ni Hua,Xian Shi,Xiang Zhang,Yinan N. Zhang,Jian Chen,Xinyi Y. Zhang,Shiyue Y. Xiao,Baiwang W. Sun
Graphical The phase transition temperature was enhanced through anion-substitution engineering in two novel crown inclusions. Intermolecular interactions and hydrogen bond were used to explain the increase of phase transition temperature. Host-guest inclusion materials serve as an ideal model for designing phase transition materials. The typical host molecule, 18-crown-6 (1, 4, 7, 10, 13, 16-hexaoxacyclo-octadecane), is known for its strong coordination with amino compounds through N−H⋅⋅⋅O hydrogen-bonding interactions, attracting the attention of numerous scientific researchers. This study presented the successful synthesis and characterization of two host-guest inclusion materials, [(trans-4-aminocyclohexanol)(18-crown-6)][ClO 4 ] ( 1 ) and [(trans-4-aminocyclohexanol)(18-crown-6)][BF 4 ] ( 2 ). Both compounds 1 and 2 underwent reversible phase changes at temperatures of 312 K/305 K and 322 K/314 K, respectively. In this article, crystal structures, thermal properties, optical properties and analyses of intermolecular interactions were discussed in details. Our endeavors are believed to have made a contribution to the advancement of phase change materials.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xiao Bai,Hang Yin,Chongchao Zhang,Ziyin Yang
Cobalt (Co) based nanomaterials are widely used to construct glucose enzyme-free electrochemical sensors. However, the correlation between anion species and the electrocatalytic activity of Co based nanomaterials remains unproven. In this paper, Co 3 X 4 with different anions (X = O, S, Se) were synthesized for electrochemical sensing of glucose. Co 3 X 4 was characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDX), powder X-ray diffractometry (XRD), and electrochemical techniques. The results showed that anion substitution had a significant effect on the electrocatalytic properties of Co 3 X 4 , and Co 3 Se 4 showed the strongest electrocatalytic activity for the oxidation of glucose. The sensor based on Co 3 Se 4 exhibited excellent performance for glucose analysis with a linear range from 2 μM to 0.71 mM, a high sensitivity of 1327.6 μA mM −1 cm −2 and a low detection limit of 0.3 μM, which demonstrates Co 3 Se 4 as a new nonenzymatic electrocatalyst for glucose sensing.
研究领域:
材料科学
·
电化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Ziqi Zhou,Ruibiao Fu,Qirui Shui,Hongxin Tang,Wenxiu Bao,Zuju Ma,Xintao Wu
Nonlinear optical (NLO) materials are playing an increasingly vital role in laser science and technology. Herein, we report a new lead formate, KCs2Pb2(HCOO)2Cl5, successfully synthesized by using mild mix-solvothermal methods. By the anionic substitution of a [CH3COO] group with a [HCOO] group, the dipole moment of the distorted [PbCl4O2] polyhedron is increased. In contrast, polarization from the anionic group and the volume of the unit cell are reduced. Hence, KCs2Pb2(HCOO)2Cl5 possesses a strong second-harmonic-generation (SHG) response of 4.2 times that of KH2PO4 (KDP), a transparent window covering 0.43–1.87 μm, a large band gap of 3.52 eV, and moderate birefringence (0.11@1064 nm). Systematic theoretical calculations illustrate the origin of the linear and nonlinear optical properties of KCs2Pb2(HCOO)2Cl5. This research provides a viable strategy for the design and synthesis of new NLO crystals.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Jingyao Zeng,Lei Sun,Jinqiang Gao,Weishun Jian,Haoji Wang,Wenyuan Li,Ningyun Hong,Baichao Zhang,Jiangnan Huang,Bai Song,Wentao Deng,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji
The integration of Mn in Na4Mn1.5Fe1.5(PO4)2P2O7 (NMFPP) enhances the energy density but compromises the Na+ mobility and structural stability due to limited electron hopping and pronounced Jahn–Teller effects. To address this, a structurally compatible anionic substitution strategy is implemented by partially replacing PO43– with bulkier and less electronegative SiO44– groups. The reinforced cathode exhibits enhanced rate performance, which is attributed to lattice expansion induced by the larger SiO44– units, thereby facilitating Na+ diffusion and reducing impedance during charge–discharge processes, as supported by GITT and DRT analyses. In addition, the improved cycling stability results from the lower electronegativity of Si, which enables SiO44– to accommodate local charge redistribution without triggering structural collapse, as evidenced by reduced lattice volume fluctuations observed in in situ XRD. Consequently, Na4Mn1.5Fe1.5(PO4)1.95(SiO4)0.05P2O7 achieves a capacity retention of up to 85.42% for 500 cycles at 1 C and 80.54% over 1500 cycles at 5 C. These findings highlight anion substitution as a promising strategy for optimizing polyanionic frameworks toward high-performance sodium-ion batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 18
·7333-7342
·
IF 4.569
Hua Yu,Liuyan Zhou,Renguang Ye,Degang Deng,Shiqing Xu
Polychromatic emission can be achieved by controlling the distribution of the rare earth activator in multi-cation lattices, which can be used in the fields of white light LED and fluorescence temperature sensing. However, it is still a challenge to control their distribution and location of the target site in a given host material because the distribution of the rare earth activator is uncertain. In this paper, we have chosen Li4SrCa(SiO4)2 as the multi-cation site host and induced the distribution of Eu2+ ions between different cation sites through anion substitution, for the first time, to regulate the luminescence characteristics of a series of Li4SrCaSi2O8−yN2y/3:Eu2+ phosphors. In Li4SrCa(SiO4)2:Eu2+ phosphors, the substitution of O2− by N3− triggered a distinct ordered to disordered structure transition of the SiO4 tetrahedron and induced the remote distribution of the Eu2+ activator, which was verified through the analysis of the XRD, EPR, FT-IR and fluorescence spectra. Due to the location of Eu2+ ions in different cation sites (Eu2+Sr and Eu2+Ca), two distinguishable emission peaks with tunable color emissions and different responses to temperature were realized. The white LED that utilized blue-orange-emitting Li4SrCaSi2O4N8/3:Eu2+ and green-emitting BaSi2O2N2:Eu2+ (500 nm) displayed an outstanding color rendering index (Ra) of 85.1. Based on the fluorescence intensity ratio (FIR) technique, an optical temperature measurement mechanism was hypothesized and studied in the temperature range of 293–473 K. The highest Sa of the material was 0.086 K−1, and Sr was 1.76% K−1 based on the FIR detection technology, revealing obviously better than most inorganic optical temperature-measuring materials reported before. Our work indicates that Li4SrCaSi2O8−2yN4y/3:Eu2+ is a promising material for application in White LEDs and optical thermometers.
研究领域:
材料科学
·
发光材料
·
无机化学
·
光电子学
·
传感器技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Rui Xiao,Wen-Dong Yao,Wenhao Xing,Chunlan Tang,Wenwen Jiang,Sheng-Ping Guo,Wenlong Yin
Adjusting the structure of compounds through an anion partial substitution strategy is an effective means to explore nonlinear optical (NLO) materials. Here, a new oxysulfide Ca3Ge2O3S4 (CGOS) crystallized in the centrosymmetric (CS) space group P21/c was synthesized by a high-temperature solid–solid reaction. Taking CGOS as the parent, the first quaternary NLO Ca-based oxyselenide Ca3Ge2O4Se3 (CGOSe) crystallized in the noncentrosymmetric (NCS) space group R3m was obtained by anion partial substitution. The 0D structure of CGOS consists of isolated [Ge2O3S4] dimers, with Ca2+ ions located between dimers to balance the charge. The 0D structure of CGOSe consists of isolated and parallelly arranged [Ge2O4Se3] dimers, with Ca2+ ions located between dimers to balance the charge. The structural evolution between CGOS and CGOSe is elucidated. CGOSe has the widest band gap of 3.02 eV in the AE3Ge2O4Q3 (AE = Ca, Sr, Ba; Q = S, Se, Te) system. Apart from the obvious NLO activity, CGOSe exhibits a high laser-induced damage threshold of around 3.2 × AgGaS2. The theoretical calculation results show that the [Ge2O4Se3] dimer is the main source of the SHG response. This work enriches the relatively less-explored Ca-based oxychalcogenides as NLO materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemical Science
·
2023
·Vol. 14
·期 46
·13568-13573
·
IF 8.4
Zhi-Xin Qiu,Zhe-Xiong Zheng,Xiao-Ming Jiang,Bin-Wen Liu,Guo-Cong Guo
Crystallographically, noncentrosymmetricity (NCS) is an essential precondition and foundation of achieving nonlinear optical (NLO), pyroelectric, ferroelectric, and piezoelectric materials. Herein, structurally, octahedral [SmCl6]3− is substituted by the acentric tetrahedral polyanion [CdBr4]2−, which is employed as a templating agent to induce centrosymmetric (CS)-to-NCS transformation based on the new CS supramolecule [Cd5P2][SmCl6]Cl (1), thereby providing the NCS supramolecule [Cd4P2][CdBr4] (2). Meanwhile, this replacement further results in the host 2D ∞2[Cd5P2]4+ layers converting to yield the twisted 3D ∞3[Cd4P2]2+ framework, which promotes the growth of bulk crystals. Additionally, phase 2 possesses well-balanced NLO properties, enabling considerable second-harmonic generation (SHG) responses (0.8–2.7 × AgGaS2) in broadband spectra, the thermal expansion anisotropy (2.30) together with suitable band gap (2.37 eV) primarily leading to the favorable laser-induced damage threshold (3.33 × AgGaS2), broad transparent window, and sufficient calculated birefringence (0.0433) for phase-matching ability. Furthermore, the first polyanion substitution of the supramolecule plays the role of templating agent to realize the CS-to-NCS transformation, which offers an effective method to rationally design promising NCS-based functional materials.
研究领域:
材料科学
·
光学
·
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）