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Chiral liquid crystals based on pillararene and supramolecular self-assembly-induced chirality amplification

Science China Chemistry 2024年第10期67卷 3373-3381页

作者： Bicong Liang Yujie Cheng Xiong Liu Lan Jia xuehong wei Qiang Zheng Pi Wang Danyu Xia Xuzhou Yan College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Scientific Instrument Center Shanxi UniversityTaiyuan 030006China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China

Macrocyclic liquid crystals combine the unique property of liquid crystals and excellent supramolecular assembly ability of macrocyclic *** is a significant challenge to make rational use of the advantages of macrocyclic compounds to prepare new macrocyclic ***,a type of macrocycles with rigid pillar-shaped frameworks and easy-tofunctionalize property,are excellent building blocks to fabricate liquid crystal ***,the site-selective modification property of pillararene has been rarely exploited to tailor liquid crystal *** reported pillararene-based liquid crystal systems are almost prepared by per-functionalized ***,we report the regulation of chiral liquid crystal behaviors by different derivatization of *** and thermotropic liquid crystals with different chirality were obtained by self-assembly of pillararene with different numbers of cholesterol *** bridge between thermotropic liquid crystal and lyotropic liquid crystal based on pillararene is *** addition,the chirality of the mesogens can be amplified through supramolecular self-assembly driven by noncovalent *** on the different liquid crystal behaviors,the optical signal of the pillararene-based chiral liquid crystals was used to fabricate an information encryption *** work provides a simple strategy to regulate liquid crystal behaviors via pillararene-based mesogens and realizes information encryption through the combination of different types of liquid crystals.

关键词： chiral liquid crystal pillararene self-assembly cholesterol information encryption

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A clusteroluminescent supramolecular polymer network constructed by pillararene and its application in information encryption

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Aggregate 2024年第5期5卷 491-500页

作者： Meiru Zhang Yujie Cheng Ting Zhang Bicong Liang xuehong wei Pi Wang Danyu Xia Xuzhou Yan Scientiﬁc Instrument Center Shanxi UniversityTaiyuanP.R.China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuanP.R.China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghaiP.R.China

Clusterization-triggered emissive(CTE)materials have attracted great attention in recent *** regulation of the emission property of materials with CTE property through supramolecular interactions is an excellent strategy for the construction of smartﬂuorescent *** this work,we have pre-pared a regulatable supramolecular polymer network with CTE properties through pillararene-based host-guest *** pillar[5]arene-grafted poly(methyl methacrylate)(PMMA)showed a classic CTE *** adding Brooker’s merocyanine-grafted polymer to the solution of the pillar[5]arene-containing PMMA,the supramolecular polymer network gel formed by the host-guest inter-actions between pillararene and Brooker’s merocyanine *** supramolecular network showed brighterﬂuorescence than the pillar[5]arene-grafted PMMA in the solid *** addition,theﬂuorescence emission of the supramolecular network can be further regulated by pH *** adding an acid,the Brooker’s merocyanine-containing guest polymer was protonated,and the supramolecular net-work changed to a protonated network through host-guest interactions between protonated Brooker’s merocyanine guest and ***,theﬂuores-cence was quenched when the supramolecular network turned into the protonated *** adding a base,the protonated network can convert back to the origi-nal network,along with recovery of theﬂ***,the regulation of theﬂuorescence of the supramolecular polymer materials with CTE was successfully realized by pillararene-based host-guest ***,this tailorableﬂuorescent supramolecular polymer network system was applied as an information encryption material.

关键词： clusterization-triggered emission host-guest interactions pillararene supramolecular polymers

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Significance of ambulatory electroencephalography for differential diagnosis of epilepsy and syncope

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Neural Regeneration Research 2008年第9期3卷 1034-1036页

作者： Xueling Zhang Lingli Zhang Deyun Zhu Lan wei xuehong Wang Department of Neurology Suqian People＇s Hospital Suqian 223800 Jiangsu Province China

BACKGROUND： Twenty-four hour ambulatory electroencephatography （AEEG） provides advantages for continuous electroencephalogram, monitoring brief loss of consciousness complicated by suspect or mild limb spasm. OBJECTIVE： To explore the significance of AEEG for differentially diagnosing epilepsy and syncope, compared to EEG. DESIGN, TIME AND SETTING： Sixty patients with brief loss of consciousness, complicated by suspect or mild limb spasm, were selected from Suqian People＇s Hospital between January 2006 and June 2007. PARTICIPANTS： Sixty participants comprised 34 males and 26 females, aged 13-64 years. According to clinical symptoms prior to the study, 36 patients were initially diagnosed with epilepsy and 24 with syncope. METHODS AND MAIN OUTCOME MEASURES： Abnormalities and epileptiform discharge were detected using EEG and AEEG, and the diagnostic value of the two methods for epilepsy and syncope was compared. RESULTS： A total of sixty patients were included in the final analysis. Abnormal AEEGs were observed in 37 cases （62%） and epileptiform discharge AEEGs in 23 cases （38%）, both of which were significantly greater than EEGs [37% （22/60）, 18% （11/60）, respectively, P 〈 0.01, 0.05]. The detection rate of abnormal AEEG and epileptiform discharge in the epilepsy group [75% （27/36）, 47% （17/36）, respectively was significantly greater than in the syncope group [42% （10/24）, 25% （6/24）, respectively, P 〈 0.01, 0.05]. CONCLUSION： AEEG can improve detection probability of epileptiform discharge and exhibits significant differences in the differential diagnosis of epilepsy and syncope.

关键词： ambulatory electroencephalography differential diagnosis epilepsy syncope

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Synthesis, structures and application of the β-hydroxy-imino aluminum complexes

Synthesis, structures and application of the β-hydroxy-imin...

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中国化学会第九届全国有机化学学术会议

作者： Zhiqiang Guo Song Wang xuehong wei Scientific Instrument Center Shanxi University School of Chemistry and Chemical Engineering Shanxi University

＜正＞Over the past few years,alkoxide and phenoxide ligands,especiallyβ-hydroxy-imino ligands（Scheme 1）have attracted increasing attention in stabilizing oxophilic metal centers such as the

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Synthesis and structural diversity of alkali-metal(Li,Na,K) alkyl magnesiates containing bidentate aminopyrrolyl ligand

Synthesis and structural diversity of alkali-metal(Li,Na,K) ...

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中国化学会第八届全国配位化学会议

作者： Zhiqiang Guo Xiaoqin Wu xuehong wei Scientific Instrument Center Shanxi University School of Chemistry and Chemical Engineering Shanxi University

The advantages of bimetallic "ate" complexes have over conventional alkali metal reagents(use of milder reaction conditions,better functional group tolerance,access to hitherto inaccessible synthetic chemistry,etc.) ensure that this area of research will blossom further in the coming years[1].Most of these studies have focused on main-group metal systems,which combine an alkalimetal with a more electronegative metal such as Mg,Zn(pseudo main group because of its s→s reactivity),or Al[2].As a part of our ongoing interest in the development of new reaction systems based on bimetallic compounds supported by multidentate pyrrole-based ligands[3],herein we have focused on the versatile bonding modes of bidentate dianionic pyrrolyl ligand[C H NH(2-CH NHBu)]as model proligand,And demonstrated three alkalimetal(Li,Na) alkyl magnesiates with a variety of intriguing *** new types of alkali-metal alkyl magnesiates shed a new light on pyrrolyl-based complexes and could provide useful tools in the field of bimetallic cooperativity.

关键词： Synthesis Structural diversity Alkali-metal magnesiates Aminopyrrole

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Meerwein-Ponndorf-Verley reactions Catalyzed by magnesium Complexes derived from N,O-bidentate Ligand

Meerwein-Ponndorf-Verley reactions Catalyzed by magnesium Co...

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中国化学会第九届全国有机化学学术会议

作者： Yupeng Hua Zhiqiang Guo xuehong wei School of Chemistry and Chemical Engineering Shanxi University Scientific Instrument Center Shanxi University

＜正＞Selective synthesis of primary and secondary alcohols is an important process for the pharmaceutical,fragrance and food aroma industries[1].The general route is the selective reduction

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Ag/石墨烯复合薄膜的制备及其导热和电磁屏蔽性能研究

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材料导报 2022年第9期36卷 27-31页

作者：刘伟贾琨谷建宇马晨魏学红山西大学化学化工学院太原030006 中国电子科技集团公司第三十三研究所电磁防护材料及技术山西省重点实验室太原030032

随着电子设备电磁干扰和散热问题日益严重,具有高导热和电磁屏蔽功能的复合材料受到广泛关注。以氧化石墨烯为原料,通过旋涂和高温热还原获得了石墨烯薄膜,并采用磁控溅射的方法在薄膜表面镀银,制备了Ag/石墨烯复合薄膜并分析了其结构... 详细信息

随着电子设备电磁干扰和散热问题日益严重,具有高导热和电磁屏蔽功能的复合材料受到广泛关注。以氧化石墨烯为原料,通过旋涂和高温热还原获得了石墨烯薄膜,并采用磁控溅射的方法在薄膜表面镀银,制备了Ag/石墨烯复合薄膜并分析了其结构形貌、导热性能、导电性能及电磁屏蔽性能。结果表明:Ag纳米颗粒均匀地负载到石墨烯薄膜的表面,当Ag纳米镀层的厚度为200 nm时,薄膜的方阻仅为0.02Ω/sq,热导率可达872 W/(m·K),相比单一石墨烯薄膜,复合薄膜在30 MHz~18 GHz频率范围的屏蔽效能提高至37~60 dB。同时,Ag/石墨烯复合薄膜以180°弯曲角进行100次反复弯曲后,屏蔽效能仍可保留85%,展现了良好的机械柔韧性。这些优良性能证明了其在柔性电子设备的电磁兼容和散热领域拥有潜在的应用前景。

关键词：石墨烯磁控溅射电磁屏蔽散热银

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超分子手性的动态调控及功能化

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科学通报 2016年第6期61卷 630-641页

作者：张静袁鸿蔡瑾魏学红刘滇生山西大学应用化学研究所太原030006 山西大学化学化工学院太原030006

超分子手性的研究对于促进生命科学﹑材料化学等相关学科的发展具有非常重要的价值,已发展成为当前手性科学领域的热点之一.动态的智能超分子手性材料具有良好的刺激响应性,其组装结构和功能特性随外界环境的改变而发生敏感的变化.本文... 详细信息

超分子手性的研究对于促进生命科学﹑材料化学等相关学科的发展具有非常重要的价值,已发展成为当前手性科学领域的热点之一.动态的智能超分子手性材料具有良好的刺激响应性,其组装结构和功能特性随外界环境的改变而发生敏感的变化.本文介绍了超分子手性的组装原理,详细阐述了光、温度、氧化还原、p H、溶剂、超声、离子、浓度等刺激对超分子手性的动态调控,着重综述了超分子手性在手性模板、手性开关、手性液晶、手性催化、手性传感、圆偏振发光材料及生物医用材料等方面的功能性研究.这些成果为超分子手性的研究领域拓展了新的发展空间,为手性科学问题的研究提供了新思路和新方法.

关键词：超分子手性自组装动态调控刺激响应手性模板

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由富烯配体合成茂金属化合物的研究

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有机化学 2001年第11期21卷 1040-1045页

作者：白生弟魏学红原欣亮刘滇生山西大学化学系

报道了一系列富烯包括烷基取代富烯、6-氨基富烯和具有稠环结构的6氨基苯并富烯经由去氢或加成反应合成取代二茂金属络合物;(1-二甲氨基)乙烯基环戊二烯基锂与过渡金属的络合反应在一定条件下可以发生分子内碳碳偶联及二甲基胺的消除反... 详细信息

报道了一系列富烯包括烷基取代富烯、6-氨基富烯和具有稠环结构的6氨基苯并富烯经由去氢或加成反应合成取代二茂金属络合物;(1-二甲氨基)乙烯基环戊二烯基锂与过渡金属的络合反应在一定条件下可以发生分子内碳碳偶联及二甲基胺的消除反应,得到丙烯桥联茂金属化合物,从推导的反应历程提出该反应的反应机理;尚合成了两个新的外消旋手性化合物.

关键词：富烯去氢加成合成茂金属化合物茂金属催化剂配体茂金属配合物烯烃聚合烯烃聚合物

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肩水金关汉简中的“家属”及其相关问题

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敦煌研究 2017年第4期 107-114页

作者：魏学宏侯宗辉甘肃省社会科学院甘肃兰州730070

肩水金关汉简中"家属符"简所蕴含的信息显示出,汉代的"家属"是一个较宽泛的概念。边疆屯戍吏卒"家属"的构成比较复杂,除其父母、配偶、子女外,还有兄、嫂、弟、弟妇、姊妹、儿媳、侄子、侄媳、侄孙、侄孙女、孙子、孙女、女婿及其外孙... 详细信息

肩水金关汉简中"家属符"简所蕴含的信息显示出,汉代的"家属"是一个较宽泛的概念。边疆屯戍吏卒"家属"的构成比较复杂,除其父母、配偶、子女外,还有兄、嫂、弟、弟妇、姊妹、儿媳、侄子、侄媳、侄孙、侄孙女、孙子、孙女、女婿及其外孙子女等。数量不菲的吏卒"家属"在边塞地区有自己独立的居所,他们是边疆建设中不可忽视的重要辅助力量。汉简所记吏卒"家属"的"居署"行为,可能是吏卒"家属"成员在接受政府廪食期间,根据屯戍需求,按照戍防机构的统一安排部署,部分"家属"人员从"私舍"到鄣坞亭燧等署所参加相应的塞防杂务劳作的一种反映。以"居署"命名造册,显现出汉政府对进入边疆地区各类人口群体的精细化管控。就吏卒"家属"及其相关问题的探究,可以丰富对汉代边疆社会治理的认识。

关键词：家属汉代居署边疆治理

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