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Molecular Ferroelastic Induced by Mono-/Double-Protonation Strategy
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作者 jia-Qi Luo Meng-Meng Lun +4 位作者 qiang-qiang jia Zhi-Jie Wang Hai-Feng Lu Yi Zhang Da-Wei Fu 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第15期1706-1712,共7页
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 tuna... 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 actuators.However,most designs of molecular ferroelastics remain in the stage of blind exploration,posing a challenge to achieve a functional ferroelastic more effectively.Herein,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 strategy.The_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 K.Meanwhile,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,etc.This work further enriches the molecular ferroelastic family and demonstrates that mono-/double-protonation is one of the effective molecular modification strategies for designing ferroelastics. 展开更多
关键词 Molecular crystal FERROELASTIC Mono-/double-protonation Mechanical flexibility Phase transition Crystal engineering Computational chemistry Molecular dynamics
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杂化卤化铅光致变色铁弹体 被引量:1
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作者 特日格勒 贾强强 +2 位作者 郭强 张毅 付大伟 《Science China Materials》 SCIE EI CAS CSCD 2023年第9期3687-3695,共9页
多功能材料是当前交叉研究的热点,有机-无机杂化材料因其结构多样性为构筑多功能材料提供了极大的可能性.多功能铁弹材料在机械开关、形状记忆以及能量转换等领域具有广泛的应用前景,特别是具备光学电学协同特征的铁弹材料是新器件应用... 多功能材料是当前交叉研究的热点,有机-无机杂化材料因其结构多样性为构筑多功能材料提供了极大的可能性.多功能铁弹材料在机械开关、形状记忆以及能量转换等领域具有广泛的应用前景,特别是具备光学电学协同特征的铁弹材料是新器件应用研究的亮点.尽管目前报道了大量具有光致发光、热致变色等优异性质的铁弹材料,但尚未破解将铁弹性和光致变色协同这一难题.本文通过功能阳离子与卤化铅骨架构筑了具有光致变色效应的铁弹体,(3-hydroxypyrrolidinium)_(4)Pb_(3)Br_(10),并通过分子间插入氢键的策略有效提高了材料的相变温度.该材料还可同时实现两步介电响应,具有可切换铁弹畴和光致变色的多通道物理特性,这对显示传感器件的探索研究非常有帮助.总之,本研究为多功能物理响应材料的合成提供了多学科交叉研究策略和思路. 展开更多
关键词 多功能材料 光致变色 机械开关 传感器件 介电响应 铁弹畴 能量转换 铁弹性
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Juvenile hormone signaling-a mini review 被引量:14
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作者 Kang Li qiang-qiang jia Sheng Li 《Insect Science》 SCIE CAS CSCD 2019年第4期600-606,共7页
Since it was first postulated by Wigglesworth in 1934, juvenile hormone (JH) is considered a status quo hormone in insects because it prevents metamorphosis that is initiated by the molting hormone 20-hydroxyecdysone ... Since it was first postulated by Wigglesworth in 1934, juvenile hormone (JH) is considered a status quo hormone in insects because it prevents metamorphosis that is initiated by the molting hormone 20-hydroxyecdysone (20E). During the last decade, significant advances have been made regarding JH signaling. First, the bHLH-PAS transcription factor Met/Gce was identified as the JH intracellular receptor. In the presence of JH, with the assistance of Hsp83, and through physical association with a bHLH?PAS transcriptional co-activator, Met/Gce enters the nucleus and binds to E-box-like motifs in promoter regions of JH primary?response genes for inducing gene expression. Second, the zinc finger transcription factor Kr-hl was identified as the anti-metamorphic factor which transduces JH signaling. Via Kr-hl binding sites, Kr-hl represses expression of 20E primary?response genes (i.e. Bi\ E93 and E5) to prevent 20E-induced metamorphosis. Third, through the intracellular signaling, JH promotes differ ent aspects of female reproduction. Nevertheless, this action varies greatly from species to species. Last, a hypothetical JH membrane receptor has been predicted to be either a GPCR or a tyrosine kinase receptor. In future, it will be a great challenge to understand how the JH intracellular receptor Met/Gce and the yet unidentified JH membrane receptor coordinate to regulate metamorphosis and reproduction in insects. 展开更多
关键词 intracellular receptor juvenile hormone (JH) Kr-h 1 membrane receptor Met/Gce metamorphosis reproduction
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