检索结果-南通市图书馆

结构化学 2024年第6期43卷 28-33页

作者： Xiao-Tong Sun Hao-Fei Ni Yi Zhang da-wei fu Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189People's Republic of China Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua321004People's Republic of China

Materials exhibiting dielectric switching response and photoluminescence(PL)are promising for sensors and information *** previous research,we synthesized a series of materials with red or green PL and dielectric switching capabilities by incorporating luminescent metal halides into organic ammonium ***,effective modification to synthesize organic-inorganic hybrid materials with dielectric switching response and orange PL continues to be a challenge in the respective *** PL materials are valuable for switching and sensors,and most orange light sources are derived from rare earth elements,making them harder to *** have successfully synthesized two organic-inorganic hybrid materials([CMPD]PbBr3(1)and[BMPD]PbBr3(2),CMPD=N-ClCH2-N-methylpiperidine,BMPD=N-BrCH2-N-methylpiperidine)that exhibit both orange PL and dielectric switching *** Cl in compound 1 is substituted by Br in compound 2,the phase transition temperature of the compound is elevated by 45 *** compounds exhibit captivating orange light emission when exposed to ultraviolet *** research provides insights into exploring multifunctional materials with orange PL and dielectric switching response and provides proof for halogen substitution strategies to design materials with higher phase transition temperatures.

关键词： Dielectric switching Photoluminescence Orange

Molecular Ferroelastic Induced by Mono-/Double-Protonation Strategy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第15期42卷 1706-1712页

作者： Jia-Qi Luo Meng-Meng Lun Qiang-Qiang Jia Zhi-Jie Wang Hai-Feng Lu Yi Zhang da-wei fu Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhuaZhejiang 321004China Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjingJiangsu 211189China

Molecular ferroelastics with the natural features of mechanical flexibility and switchable spontaneous strain have attracted widespread attention in the scientific community due to their potential applications in tunable gratings,flexible memorizers,strain sensors,and intelligent ***,most designs of molecular ferroelastics remain in the stage of blind exploration,posing a challenge to achieve a functional ferroelastic more ***,we have successfully obtained a molecular ferroelastic,[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2)(Me_(2)NH(CH_(2))_(2)NH_(3)=N,N-dimethylethylenediammonium),under the guidance of the mono-/double-protonation ***_double-protonated[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) undergoes a paraelastic-ferroelastic phase transition with the Aizu notation of 2/mFi at 322 ***,the theoretical calculation and experimental measurement simultaneously show that[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) possesses good mechanical flexibility,because its elastic modulus(E)of 8.26 GPa and hardness(H)of 0.45 GPa are smaller than the average values of organic crystals(E of 12.05 GPa and H of 0.5 GPa),which makes it promising to apply in wearable pressure sensors,implantable medical sensors,high-precision tuners,*** work further enriches the molecular ferroelastic family and demonstrates that mono-/double-protonation is one of the effective molecular modification strategies for designing ferroelastics.

关键词： Molecular crystal Ferroelastic Mono-/double-protonation Mechanical flexibility Phase transition Crystal engineering Computational chemistry Molecular dynamics

Crystal structure and dielectric property of supramolecular macrocyclic[(NDPA).(18-crown-6)]^(2+)·(DMA)^+·3ClO_4^-assemblies

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第1期26卷 31-35页

作者： Fang-Fang Wang Cheng Chen Yi Zhang da-wei fu Ordered Matter Science Research Center Southeast University

One novel organic-inorganic hybrid supramolecular assemblies ｜（NDPA）（18-crown-6）]2＋（DMA）＋·3ClO4^-（1）,has been successfully constructed through the prominent strategies of crystal engineering（NDPA = N,N-dimethyI-1,4-phenylenediamine,DMA = dimethylamine）,and characterized by IR,powder XRD and single crystal X-ray *** the structure,the supramolecular organic cations and inorganic ClO_4^- anions are arranged alternately and linked by N-O…H hydrogen *** is worthy to note that the ClO_4^- are linked to form one-dimensional inorganic chain through strong NH…O hydrogen bonds along *** is no distinct dielectric anomaly in the temperaturedependent and frequency-dependent dielectric constant curves,suggesting that no phase transition exists within the measured temperature range（120-420 K）.The relative displacement of cations and anions,the turned polarization of molecular electric moment and macrocyclic molecule rotator are the main factors to determine the trend of dielectric constant.

关键词： Organic-inorganic hybrid Dielectric constant Macrocyclic assembly Crystal structure

Ferroelectric hybrid organic-inorganic perovskites and their structural and functional diversity

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第2期10卷 242-259页

作者： Tie Zhang Ke Xu Jie Li Lei He da-wei fu Qiong Ye Ren-Gen Xiong Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics Southeast University Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal University

Molecular ferroele ctrics have gradually aroused great interest in both fundamental scientific research and te chnological applications because of their easy processing,light weight and mechanical *** organic-inorganic perovskite ferroelectrics(HOIPFs),as a class of molecule-based ferroelectrics,have diverse functionalities owing to their unique structure and have become a hot spot in molecular ferroelectrics ***,they are extremely attractive in the field of ***,there seems to be a lack of systematic review of their design,performance and potential ***,we review the recent development of HOIPFs from lead-base d,lead-free and metal-free perovskites,and outline the vers atility of these ferroelectrics,including piezoelectricity for mechanical energy-harvesting and optoelectronic properties for photovoltaics and light ***,a perspective view of the challenges and future directions of HOIPFs is also highlighted.

关键词： ferroelectrics hybrid perovskite molecular design photoelectric effect piezoelectricity

Hydrogen-Bonded Engineering Enhancing Phase Transition Temperature in Molecular Perovskite Ferroelastic

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2022年第13期40卷 1559-1565,I0002页

作者： Tie Zhang Kun Ding Jun-Yi Li Guo-wei Du Lu-Lu Chu Yi Zhang da-wei fu Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjingJiangsu211189China

The broad operating temperature range is sought for molecular ferroic materials who are expected to be applied to flexible and electronic *** bonds,an effective force between molecules,are important to regulate the molecule structure and their condition,helping a higher temperature range for ferroic ***,we report a molecular perovskite ferroelastic(Me-Hdabco)Rb[BF_(4)]_(3)(Me-Hdabco=N-methyldabconium)which shows high temperature(T_(1)=322.5 K and T_(2)=381K)ferroelastic phase *** ferroelastic phase transition temperature range of(Me-Hdabco)Rb[BF_(4)]_(3) is significantly increased by 71 K compared with[Meda-bco-F]Rb[BF_(4)]_(3)(Medabco-F=1-fluoro-4-methyl-1,4-diazoniabicyclo[2.2.2]octane).Structural analysis and thermal analysis demonstrate the ferroelastic phase transition is mainly attributed to dynamic cations order and disorder ***,new hydrogen bonds generated between cations and the Rb_(8)[BF_(4)]_(12) frame increase their intermolecular force,which is beneficial to improving the phase transition *** finding has an important impact on the utilization of weak interactionforces to design and optimize functional materials.

关键词： Molecular dynamics Ferroelastic crystal Dielectric Hydrogen bonds Phase transitions

Synthesis of Cerium-containing Polymethylphenyl Silicone and Its Antioxidant Effect on Fluorosilicone Rubber

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2019年第8期37卷 783-789页

作者： Yong Guan Jian Hu Yong-Kang Huang Yang You Huan-Yao Zhang An-Na Zheng Xiang Xu da-fu wei Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China Key Laboratory for Specially functional Polymeric Materials and Related Technology of the Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China

As an essential elastomer used in edge technologies, fluorosilicone rubber(FSR) suffers serious oxidative ageing problem when serving at high temperature. Cerium oxide is generally used as an antioxidant additive but remains unsatisfactory. In order to obtain better antioxidant effect on improving the thermal stability of FSR, a kind of cerium-containing polymethylphenyl silicone(PSI-Ce) was synthesized and the structure was verified by Fourier-transform infrared spectroscopy(FTIR) and proton nuclear magnetic resonance(1HNMR). Due to the homogeneous dispersion on molecular scale, PSI-Ce imposed much better antioxidant effect than the commercial CeO2 did, no matter from isothermal degradation at 320 ℃ or thermal-oxidative ageing test at 230 ℃. In particular, after ageing for 72 h,FSR/PSI-Ce(2 phr) maintained 82% of tensile strength and 63% of elongation at break, in comparison to the corresponding values of 48%and 42% for FSR/CeO2(2 phr). Moreover, 2 phr PSI-Ce was equivalent to 0.046 phr CeO2 according to cerium element conservation.

关键词： Polymethylphenyl silicone Cerium Fluorosilicone rubber Thermal stability

Mechanochemistry enables optical-electrical multifunctional response and tunability in two-dimensional hybrid perovskites

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2021年第3期64卷 706-716页

作者： Zhi-Xu Zhang Chang-Yuan Su Ji-Xing Gao Tie Zhang da-wei fu Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189China Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua321004China

Two-dimensional(2D)organic-inorganic hybrid perovskites(OIHPs)have attracted phenomenal attention because of their superior optoelectronic *** combination of their structural tunability and material stability offers an unprecedented opportunity to engineer materials with unique ***,developing a rapid and effective design method for introducing luminescence into dielectric switch and realizing controllable regulation has been an enormous *** far,materials with tunable optoelectronic multichannel response have not been successfully *** this study,we successfully developed a facile and effective mechanochemical method for realizing the integration and regulation of luminescence and dielectric switch in 2D perovskites,which is unprecedented for the design of dielectric switching *** mild external mechanical stimuli enabled the formation of Mn ion-doped 2D hybrid perovskites(Cyclopropylammonium)2Pb1-xMnxBr4 with excellent dielectric switch and rapidly controllable luminescence of highly efficient blue light,white light,pink light,and orange *** work will provide a new perspective on the rapid and effective design of multifunctional materials and can inspire the future development of low-cost and high-efficiency electronics.

关键词： 2D hybrid perovskite tunable optoelectronic response mechanochemistry multifunctional material

The structure and dielectric properties of ionic compounds with flexible ammonium moiety

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第3期26卷 382-386页

作者： Hui-Ting Wang Li-Hui Kong Ping-Ping Shi Qiang Li Qiong Ye da-wei fu Ordered Matter Science Research Center Southeast University

The 3-morpholin-4-yl-propyl-ammine tetrafluoroborate（MPA^＋）（BF4^-）（1） and the 3-morpholin-4-ylpropyl-ammine perchlorate（MPA^＋）（ClO4^-）（2） were synthesized and separated as colorless block ***（MPA^＋）（BF4^-） undergoes a reversible phase transition at ca.347.3 K with a hysteresis of16.1 *** measurement also can confirm the *** crystal structure determined at300 K（monoclinic,P21/c,a = 9.978（2）A,b = 7.5206（15）A,c = 15.058（3）A,b = 96.99（3）8,v = 1121.6（4）A^3,z = 4） and 373 K（triclinic,P-1,a = 10.021（7）A,b = 7.662（3）A,c = 7.920（4）A,a = 95.012（14）8,b = 101.67（4）8,g = 91.48（3）8,v = 592.7（6）A^3,z = 2） reveal that this compound has two *** most distinct is the BF4^- anion is disorder at 373 K,which is probably the driving force of the phase *** measurement,dielectric measurement and the crystal structure of the compound 2 did not change at 300 K and 100 K.

关键词： moiety ionic dielectric triclinic reversible monoclinic propyl ammonium anion cyclohexane

Iso-structural phase transition in tetramethylammonium nickel(Ⅱ)nitrite[(CH_3)_4N][Ni(NO_2)_3]

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2014年第6期25卷 844-848页

作者： Li-Hui Kong da-wei fu Qiong Ye Heng-Yun Ye Yi Zhang Ren-Gen Xiong Ordered Matter Science Research Center Southeast University

The title compound, tetramethylammonium nickel nitrite [（CH3）4N][Ni（NO2）3], has a hexagonal perovskite-type structure with formula ABX3. It undergoes two reversible phase transitions occurring at about 409.1 and 428.4 K, associated with dielectric transitions. DSC measurement and dielectric measurement confirm the transition. The variable-temperature X-ray structural determinations and the powder X-ray diffraction （PXRD） experiments reveal that this compound has the same space group P3ml （No. 164） at 293 K, 413 K and 438 K. The phase transitions are caused by the rotation of the [（CH3）4N]＋ cation.

关键词： Phase transition Dielectric DSC PXRD X-ray structural Perovskite-type structure

full-temperature covered switching material with triple optic-dielectric states in a lead-free hybrid perovskite

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2020年第11期63卷 2281-2288页

作者： Tie Zhang Lulu Chu Zhixu Zhang Jie Li Wanying Zhang Pingping Shi Qiong Ye da-wei fu Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing 211189China Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua 321004China

Optic-electric responsive materials have attracted much attention for their applications in temperaturesensing,actuators,and memory ***,it is a challenge to integrate various functions to form multifunctional responsive *** molecule-based hybrid materials usually consist of organic and inorganic components,the introduction of multiple functions can be achieved through structural *** far,even though fulltemperature cover is required for device applications,fulltemperature covered multi-switchable hybrid materials have rarely been successfully ***,the dynamic[(CH3)3NOH]+cation and luminous center Mn(II)were introduced to form a hybrid material[(CH3)3NOH][Mn Cl3],showing multiple temperature-responsive *** temperature change,it exhibits multi-state dielectric switching response and intensity or peak shift response of luminous in full-temperature range(low,room,and high temperatures).These responsive behaviors are triggered by the motion or reorientation of[(CH3)3NOH]+cations and inorganic ***,the switchable photoelectric material has potential applications in multiple encrypted storage and sensor devices.

关键词： responsive material multiple dielectric states crystal perovskite