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Crystal structure and optical performance analysis of a new type of persistent luminescence material with multi-functional application prospects

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Journal of Energy Chemistry 2022年第6期31卷 150-160,I0005页

作者： Songsong Ding Pohua Chen Haijie Guo Peng Feng Yunpeng Zhou Yuhua Wang Junliang Sun National and Local Joint Engineering Laboratory for Optical Conversion materials and Technology of National Development and Reform Commission Department of Materials ScienceSchool of Materials and EnergyLanzhou UniversityLanzhou 730000GansuChina College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China

Persistent luminescence (PersL) materials,as environmentally friendly and energy-saving materials,have broad application prospects in many fields such as lighting,chemistry and even biomedicine.However,studies on the types,performances and mechanism of PersL materials are still insufficient,which significantly restricts their development and application.Under this consideration,we successfully synthesized a yellow PersL material CaSrGa_(4)O_(8)(CSG).The crystal structure was studied in detail through Rotation Electron Diffraction (RED) and Powder X-ray Diffraction (PXRD).What’s more,by co-doping Mn^(2+) and Yb^(3+),the afterglow brightness of CSG could be increased by nearly 20 times,and the afterglow duration could reach more than 6 h.It is worth mentioning that the samples also have excellent performances in mechanical luminescence (ML),photostimulated luminescence (PSL) and cathodoluminescence (CL),which was also investigated systematically.Finally,an anti-counterfeiting label was designed by the samples to reveal the potential of their application in anti-counterfeiting.The results showed that our research not only provided a new candidate PersL material for multifunctional applications,but also gave good help for studying the physical and chemical properties of CSG.

关键词： Persistent luminescence multifunctional materials Mechanoluminescence Anti-counterfeiting Cathodoluminescence

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A stretchable triboelectric generator with coplanar integration design of energy harvesting and strain sensing

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Science China(Technological Sciences) 2022年第1期65卷 221-230页

作者： WU Bin ZHANG ZengXing XUE XiaoBin HAO CongCong ZHANG WenJun BI RuiYu WANG Qiang XUE ChenYang Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

The rapid development of flexible triboelectric nanogenerators(TENGs)has become an alternative to batteries for wearable devices.Stretchable,multifunctional,and low-cost are the primary development directions for these wearable devices based on TENG.Herein,a stretchable triboelectric generator with coplanar integration was designed for energy harvesting and force sensing.The industrial conductive silicone and silicone were used to fabricate the TENG with a thickness of less than 0.9 mm.When the elongation was less than 150%,TENG exhibited excellent linear characteristics in the resistance-tensile strain correspondence,and the coefficient of determination was 0.99.This stretchable TENG with a sufficient contact area of 9 cm^(2) could generate a short-circuit current of 2μA when it was in contact with the skin.Lastly,an intelligent tension monitoring wearable device that can effectively measure the tensile force was developed.Such a stretchable,coplanar integration-based,and low-cost wearable device has excellent applicability in wearable electronics.

关键词： wearable device stretchable force monitoring multifunctional materials

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Tuning microwave absorption properties of Ti_(3)C_(2)T_(x) MXene-based materials:Component optimization and structure modulation

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Journal of materials Science & Technology 2023年第17期148卷 150-170页

作者： Ming Chang Qingyu Li Zirui Jia Wanru Zhao Guanglei Wu Institute of materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China College of Earth Sciences Jilin UniversityChangchun 130021China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

The current electromagnetic environment brings a growing demand for efficient microwave absorption(MA)materials.Ti_(3)C_(2)T_(x) MXene,one of the 2D transition-metal carbides,is considered to be a promising MA material owing to its superior dielectric properties and structural processability.In order to further improve the MA performance and environmental adaptability of Ti_(3)C_(2)T_(x) MXene,Ti_(3)C_(2)T_(x) MXene-based MA materials enhanced by composition and structure design have been extensively studied and the regu-lation ideas for its MA properties can be outlined as component optimization and structure manipulation strategies based on the microwave absorption mechanism.Herein,we briefly introduced the microwave absorption mechanism and focused on the design strategies of Ti_(3)C_(2)T_(x) MXene-based MA materials based on recent advances.In addition,the prospects of Ti_(3)C_(2)T_(x) MXene-based MA materials were also discussed.

关键词： Ti_(3)C_(2)T_(x)MXene Component optimization Structure manipulation multifunctional materials Microwave absorption

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Fluorescence emission modulation in cyanido-bridged Fe(Ⅱ)spin crossover coordination polymers

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Science China Chemistry 2022年第8期65卷 1569-1576页

作者： Xue-Ru Wu Zhi-Kun Liu Min Zeng Ming-Xing Chen Jun Tao Shu-Qi Wu Hui-Zhong Kou Department of Chemistry Tsinghua UniversityBeijing 100084China Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of TechnologyBeijing 102488China Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Institute for materials Chemistry and Engineering&IRCCS Kyushu University744 MotookaNishi-kuFukuoka 819-0395Japan

Synergistic fluorescent spin crossover(SCO)bifunctional molecular materials have novel applications in the molecule-based magneto-optical switches.Herein,we report two novel three-dimensional(3D)Hofmann-type fluorescent SCO complexes[Fe^(II)-(tppe)MI(CN)_(2)]ClO_(4)·nSolv(tppe=tetra-(4-pyridylphenyl)ethene,M=Ag(tppe-Ag),Au(tppe-Au)).Both complexes show one-step abrupt SCO with the transition temperature of 230 K for tppe-Ag,and 245 K for tppe-Au accompanied by a color change from red to light yellow.The SCO process is confirmed by the variable-temperature single-crystal X-ray diffraction analysis on tppe-Ag.For the first time,the abnormal increase in emission intensity and concomitant large bathochromic shifts in the fluorescence spectra during the SCO process are realized in the 3D Hofmann-type coordination polymers expanded by the tetradentate tppe ligand.Moreover,tppe-Ag exhibits the unprecedented fluorescence emission from green to the edge of yellow.

关键词： fluorescence spin crossover multifunctional materials coordination polymers synergetic effect

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multifunctional materials Based on Redox-active Tetrathiafulvalene and Its Derivatives

Multifunctional Materials Based on Redox-active Tetrathiaful...

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中国化学会第十届全国无机化学学术会议

作者： Jing-Lin Zuo State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University

In recent years, the design and study of multifunctional molecular materials(such as metal-organic frameworks, MOFs) exhibiting multiple accessible properties have attracted enormous attention owing to their potential applications. Meanwhile, the exquisite control that can be achieved over the design of MOFs via rational structural modifications to the component metal ions and ligands provide unique prospects for regulating their topologies and elucidating fundamental structure-activity relationships. Tetrathiafulvalene(TTF, C

关键词： multifunctional materials Coordination Compounds Molecular Conductors

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Highly Efficient multifunctional Luminescent Radicals

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CCS Chemistry 2022年第2期4卷 722-731页

作者： Yihan Zhao Alim Abdurahman Yimeng Zhang Ping Zheng Ming Zhang Feng Li State Key Laboratory of Supramolecular Structure and materials College of ChemistryJilin UniversityChangchunJilin 130012

Stable organic luminescent radicals are a special class of compounds integrating optical,electrical,and magnetic properties.Luminescent radicals not only have potential applications in the field of the organic light-emitting diodes(OLEDs)but can also be applied in the fields of fluorescence sensing,bioimaging,and so forth.Nevertheless,due to the adverse effects of solvent polarity on the luminescent performance of radicals,no feasible approaches have been found in the literature toward fluorescent sensing.In this work,we report two luminescent radicals,2αPyID-TTM and 2δPyID-TTM,whose emissions show high efficiency and less dependence on solvent polarity.Both radicals show remarkable protonation–deprotonation properties.Besides,2αPyID-TTM exhibits significant fluorescence quenching and colorimetric response toward Fe^(3+)in aqueous solution.This suggests the possibility of a fluorometric/colorimetric dual-channel probe for Fe^(3+).Moreover,an optimized OLED using 2δPyID-TTM as an emissive dopant shows pure red emission and a maximum external quantum efficiency(EQE)of 10.6%.These results show promise for luminescent radicals as fluorescent probes and electroluminescent emitters.

关键词： luminescent radical proton response fluorescence probe multifunctional materials organic light-emitting diodes

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Hybrid Optical-Electrical Perovskite Can Be a Ferroelastic Semiconductor

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CCS Chemistry 2022年第6期4卷 2009-2019页

作者： Changyuan Su Mengmeng Lun Yidan Chen Yichen Zhou Zhixu Zhang Ming Chen Peizhi Huang Dawei Fu Yi Zhang Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing 211189 Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua 321004

Organic–inorganic hybrid perovskites(OIHPs)have been a hot research topic due to their advanced structural and functional features that cover almost all the research fields of intelligent materials including ferroelectric,photovoltaic,fluorescent,and dielectric.However,the development of the construction of an OIHP ferroelastic semiconductor with optical-electrical response has been a huge challenge and infrequently reported.In this work,a rare and interesting hybrid perovskite ferroelastic semiconductor,[BFDA]PbBr_(3)(BFDA=benzyl-(2-fluoro-ethyl)-dimethyl-ammonium),was synthesized,which benefits from the structural advantage of a long tail BFDA to be balanced by the suitable inorganic framework.[BFDA]PbBr_(3) shows a high-temperature ferroelastic phase transition at 365 K and a direct band gap of 3.33 eV.In addition,it can emit charming orange-pink light under a 365 nm UV lamp.To combine this with the ferroelastic,optical,and dielectric properties,[BFDA]PbBr_(3) can be identified as a very rarely reported ferroelastic semiconductor.The above-mentioned synthesis strategy is also helpful for the enrichment and development of the hybrid perovskite family.

关键词： hybrid perovskite ferroelastics phase transition photoluminescent semiconductor multifunctional materials

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Photoluminescence and electrical properties of Eu^3＋-doped Na0.5Bi4.5Ti4O15-based ferroelectrics under blue light excitation

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Frontiers of materials Science 2016年第1期10卷 31-37页

作者： Xing-an JIANG Xiang-ping JIANG Chao CHEN NaTU Yun-jing CHEN Ban-chao ZHANG Jiangxi Key Laboratory of Advanced Ceramic materials Department of Materials Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China

Na0.5Bi4.5-xEuxTi4O15 （NBT-xEu^3＋） ceramics with x= 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30 and 0.40 were prepared by conventional ceramics processing. NBT-0.25Eu^3＋ ceramics show the strongest red and orange emissions corresponding to the 5D0 → 7F2 （617 nm） and 5D0→ 7F1 （596 nm） transitions, respectively. The strongest excitation band around 465 nm matches well with the emission wavelength of commercial InGaN-based blue LED chip, indicating that Eu^3＋-doped NBT ceramics may be used as potential environmental friendly red-orange phosphor for W-LEDs application. As an inherent ferroelectric and piezoelectric material, the electrical properties of this potentially multifunctional electro-optical material have been also studied. The introduction of Eu^3＋ distinctly increased the Curie temperature （Tc） of NBT-xEu^3＋ ceramics from 640℃ to 711℃ as x ranges from 0 to 0.40. For higher temperature applications, the electrical conductivity was also investigated. The conduction of charge carriers in hightemperature range originates from the conducting electrons from the ionization of oxygen vacancies. High Tc and low tanδ makes Eu^3＋-doped NBT ceramic also suitable for high temperature piezoelectric sensor applications and electro-optical integration.

关键词： Aurivillius bismuth layered structure photoluminescence electricalproperties multifunctional materials

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Three-Dimensional Porous Heterometallic-Organic Frameworks： Synthesis, Luminescent, Magnetic, Adsorption and Hydrogen Storage Properties

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Chinese Journal of Chemistry 2016年第2期34卷 196-202页

作者： Yaqun Cao Runwei Wang Gang Wu Qianrong Fang Shilun Qiu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun Jilin 130012 China

Two three-dimensional （3D） porous heterometal-organic frameworks （HMOFs） with isostructures, [Zn2Cd（OH）（BTC）2（DMF）（H20）z].（H30）（JUC-155A） and [ZnCo2（OH）（BTC）z（DMF）（H2O）2].（H3O）（JUC-155B）（JUC = Jilin University China, BTC = 1,3,5-benzenetricarboxylate and DMF = N,N-dimethylformamide）, have been successfully synthesized by utilizing two kinds of 3d metal ions （Zn（II） and Cd（II） or Zn（II） and Co（II）） under conformable conditions. X-ray crystallography reveals that both HMOFs consist of trinuclear metal-carboxylate secon- dary building units （SBUs）, and these SBUs are interlinked by the phenyl groups of BTC ligands to generate 3D open-frameworks with two types of channels of about 6.3 and 10.7 A.. Both HMOFs show the multifunctional prop- erties in photoluminescence and adsorption. JUC-155B also exhibits an antiferromagnetic interaction, owing to the presence of dinuclear cobalt centers. Additionally, the high-pressure hydrogen storage of JUC-155A has been also examined at 77 K. By using mixed metal centers in clustered SBUs, it is a good strategy to construct those isostructures with heterometallic systems, and it is believed that the presence of such HMOFs will further facilitate the exploration ofmultifunctional materials.

关键词： metal-organic framework heterometal-organic framework multifunctional materials porous materials

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Photoluminescence and electrical properties of Er3＋-dopedNa0.5Bi4.5Ti4O15-Bi4Ti3O12 inter-growth ferroelectric ceramics

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Frontiers of materials Science 2017年第1期11卷 51-58页

作者： Yalin JIANG Xiangping JIANG Chao CHEN Yunjing CHEN Xingan JIANG Na TU Jiangxi Key Laboratory of Advanced Ceramic materials Department of Material Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China

Upconversion （UC） and electrical properties of Na0.5Bi8.5-xErxTi7O27 （NBT-BIT-xEr, 0.00≤x≤0.25） ceramics were studied. Structural analysis revealed that a single inter-growth structured phase exists in all samples and the Er3＋ ion substituting for Bi3＋ at the A-site increases the orthorhombic distortion. Under the 980 nm laser excitation, two characteristic green emission bands and one red emission band were situated at 527, 548 and 670 nm, corresponding to the transitions 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2, respectively. The optimal photoluminescence （PL） were found in the NBT-BIT-0.20Er sample, and the emission color transforms from green to yellowish green. Temperature dependence of fluorescence intensity ratio （FIR） for NBT-BIT-0.20Er was measured ranging from 290 to 440 K and its maximum sensitivity was calculated to be about 0.0020 K-1 at 290 K. Dielectric measurements indicated that Tc slightly increased simultaneously with the decrease of tanS. Therefore, this ceramic has potential applications for high-temperature multifunctional devices.

关键词： inter-growth structure photoluminescence （PL） electrical properties multifunctional materials

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