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Chinese Chemical Letters 2018年第10期29卷 1533-1536页

作者： Weijian Luo Yiren Zhang Yongyang Gong Qing Zhou Yongming Zhang wangzhang yuan Shanghai Key Lab of Electrical Insulation and Thermal Aging Shanghai Electrochemical Energy Devices Research CenterSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University

Pure organic luminogens with efficient room temperature phosphorescence（RTP） and remarkable mechanochromism are highly desired in view of their fundamental significance and technical applications. Herein, four twisted pure organic luminogens based on benzophenone and aromatic amines were synthesized and their photophysical properties were thoroughly investigated. They exhibit crystallization-induced phosphorescence（CIP）, giving bright fluorescence and phosphorescence dual emission in crystals. Upon grinding, they become amorphous and emit predominantly red-shifted fluorescence, demonstrating remarkable mechanochromism. Furthermore, three of them even demonstrate greatly enhanced emission upon grinding, which is rarely observed in twisted D-A structured luminogens.

关键词： Crystallization-induced phosphorescence Room temperature phosphorescence Mechanochromism Benzophenone Aromatic amines

1-((12-Bromododecyl)oxy)-4-((4-(4-pentylcyclohexyl)phenyl)ethynyl) benzene: Liquid crystal with aggregation-induced emission characteristics

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Science China Chemistry 2013年第9期56卷 1191-1196页

作者： CHEN YaFei LIN JieSheng yuan wangzhang YU ZhenQiang LAM Jacky WingYip TANG Ben Zhong Shenzhen Key Laboratory of Functional Polymers School of Chemistry and Chemical EngineeringShenzhen University National Institutes for Food and Drug Control School of Chemistry and Chemical engineering Shanghai Jiao Tong University Department of Chemistry The Hong Kong University of Science & Technology

The luminescent liquid crystals (LLCs) are expected to solve the conflicts between the aggregation caused quenching and the requirement of aggregation or self-organization for LCs. Herein, we developed a new strategy of applying aggregation-induced emission (AIE) phenomenon to the molecular design of LCs towards LLCs. In this report, a calamitic liquid crystal based on tolane with AIE characteristics was successfully synthesized and the chemical structure was characterized by 1H, 13C NMR, and matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) high-resolution mass spectra. The fluorescence behavior was studied by fluorescence spectroscopy and the liquid crystal phase behaviors were investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM). The crystal structure was obtained by X-ray diffraction crystallography with P1 space group. Results demonstrated that the sample was AIE active and the LC phases sequence during cooling was nematic, smectic C and smectic B phase.

关键词： aggregation-induced emission tolane liquid crystal phase behavior

D-A structured high efficiency solid luminogens with tunable emissions： Molecular design and photophysical properties

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Chinese Chemical Letters 2017年第11期28卷 2133-2138页

作者： Yunzhong Wang Zihan He Gan Chen Tong Shan wangzhang yuan Ping Lu Yongming Zhang School Of Chemistry and Chemical Engineering Shanghai Key Lab of Electrical Insulation and Thermal Aging Shanghai Electrochemical Energy Devices Research Center Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun 130012 China

Fabrication of efficient solid luminogens with tunable emission is both fundamentally significant and technically important. Herein, based on our previous strategy for the construction of efficient and multifunctional solid luminogens through the combination of diverse aggregation-induced emission （ALE） units with other functional moieties, a group of luminophores with electron donor-acceptor （D-A） structure and typical intramolecular charge transfer （ICT） characteristics, namely CZ-DCDPP, DPA-DCDPP and DBPA-DCDPP were synthesized and investigated. The presence of twisting and AlE-active 2,3- dicyano-S,6-diphenylpyrazine （DCDPP） moiety endows them highly emissive in the solid states, whereas the introduction of arylamines with varied electron-donating capacity and different conjugation render them with tunable solid emissions from green to red. While CZ-DCDPP and DPA-DCDPP solids exhibit distinct mechanochromism, both DPA-DCDPP and DBPA-DCDPP solids can generate efficient red emission. Owing to their high efficiency, remarkable thermal and morphological stabilities and moreover red emission, they are promising for diverse optoelectronic and biological applications.

关键词： Aggregation-induced emission lntramolecutar charge transfer Electron donor-acceptor Efficient solid luminogens Luminescence mechanochromism Red emission

Crystallization-induced phosphorescence of benzils at room temperature

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Science China Chemistry 2013年第9期56卷 1183-1186页

作者： GONG YongYang TAN YeQiang LI Hong ZHANG YiRen yuan wangzhang ZHANG YongMing SUN JingZhi TANG Ben Zhong School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Polymer Science and Engineering Zhejiang University Department of Chemistry The Hong Kong University of Science & Technology HKUST Shenzhen Research Institute

Efficient room temperature phosphorescence (RTP) is rarely observed in pure organic luminogens. However, we have newly observed that benzil and its derivatives are nonluminescent in solvents and thin layer chromatography (TLC) plates, but become highly phosphorescent in crystal state at room temperature, exhibiting typical crystallization-induced phosphorescence (CIP) characteristics. The CIP phenomenon is ascribed to the restriction of intramolecular rotations in crystals owing to effective intermolecular interactions. Such intermolecular interactions greatly rigidify the molecular conformation and significantly decrease the nonradiative deactivation channels of the triplet excitons, thus giving boosted phosphorescent emission at room temperature.

关键词： crystallization-induced phosphorescence room temperature phosphorescence benzils intermolecular interactions

Room temperature phosphorescence from natural products: Crystallization matters

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Science China Chemistry 2013年第9期56卷 1178-1182页

作者： GONG YongYang TAN YeQiang MEI Ju ZHANG YiRen yuan wangzhang ZHANG YongMing SUN JingZhi TANG Ben Zhong School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Polymer Science and Engineering Zhejiang University Department of Chemistry The Hong Kong University of Science & Technology HKUST Shenzhen Research Institute

Efficient room temperature phosphorescence is observed in natural compounds and polymers such as starch, cellulose, bovine serum albumin (BSA), and some other carbohydrates. Whereas being practically nonluminescent in solutions and TLC plates, they emit bright phosphorescence in the crystalline states with lifetime up to microseconds, exhibiting crystallization-induced phosphorescence (CIP) characteristics. The CIP of these natural products without any conventional chromophores offers a new platform for the exploration of conceptually novel luminogens.

关键词： room temperature phosphorescence natural products cellulose starch bovine serum albumin

High efficiency D-A structured luminogen with aggregation-induced emission and mechanochromic characteristics

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Chinese Science Bulletin 2013年第22期58卷 2719-2722页

作者： LU YaWei TAN YeQiang GONG YongYang LI Hong yuan wangzhang ZHANG YongMing TANG Ben Zhong School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Polymer Science and Engineering Zhejiang University Department of Chemistry The Hong Kong University of Science & Technology

A novel luminogen, CZ2TPAN, with typical D-A architecture was obtained. It shows intramolecular charge transfer and aggregation-induced emission characteristics with high solid-state efficiency of 65.3%. Moreover, it exhibits reversible mechanochromic behavior between crystalline and amorphous states with remarkable emission color change from green (504 nm) to yellow (545nm).

关键词：发光特性诱导 DA 分子内电荷转移排放聚集结构颜色变化

Detection of the critical micelle concentration of cationic and anionic surfactants based on aggregation-induced emission property of hexaphenylsilole derivatives

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Science China Chemistry 2009年第6期52卷 755-759页

作者： TANG Li JIN JiaKe ZHANG Shuang MAO Yu SUN JingZhi yuan wangzhang ZHAO Hui XU HaiPeng QIN AnJun TANG Ben Zhong Department of Polymer Science and Engineering Institute of Biomedical MacromoleculesZhejiang UniversityHangzhou 310027China Department of Chemistry The Hong Kong University of Science&TechnologyHong KongChina

We report a fluorescence "turn-on" method to detect the critical micelle concentration (CMC) of surfactants. This method works well for both cationic and anionic surfactants. It employs an unprecedented mechanism (aggregation-induced emission, or AIE) to determine the CMC values, and the results are consistent with the data obtained by the classical techniques. In addition, this method renders the convenient detection of the CMC values. Any large and professional instruments are unnecessary, instead, a portable UV lamp and an ultrasonic generator are enough to carry out the detection in an ordinary laboratory. Considering that micelles are interesting entities and have found applications in many important fields such as emulsion polymerization, template of nanosized materials synthesis, controllable drug delivery and macromolecular self-assembling. Our experimental results may offer a facile, sensitive and promising method to detect the formation of micelles constructed by the new amphiphilic molecules and macromolecules.

关键词： aggregation-induced emission critical micelle concentration fluorescence probe

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具有全色发光的非芳香聚马来酰亚胺

化学进展 2022年第9期34卷 1879-1881页

作者：朱天文袁望章上海交通大学化学化工学院上海200240

有机发光材料由于分子结构多样、发光颜色可调、加工简便等优点受到广泛关注。经典有机发光分子往往含有大的π共轭结构,并由此产生充分的电子离域。然而,此类有机发光分子往往含有稠环或芳杂环结构,具有潜在的细胞毒性;且在调节发光颜... 详细信息

有机发光材料由于分子结构多样、发光颜色可调、加工简便等优点受到广泛关注。经典有机发光分子往往含有大的π共轭结构,并由此产生充分的电子离域。然而,此类有机发光分子往往含有稠环或芳杂环结构,具有潜在的细胞毒性;且在调节发光颜色时往往需要增加分子共轭、改变取代基或引入不同的推拉电子结构,合成步骤较为繁琐。与之相比,不含大型共轭单元而仅含N、O、S、P等杂原子及C=O、C=N、C≡N、C=C等富电子单元的非典型发光化合物结构简单,可通过商购或简单反应获得。且许多非典型发光分子与生物体系密切相关,生物相容性良好,有利于后续应用。

关键词：有机发光材料电子单元发光颜色马来酰亚胺电子离域生物体系简单反应芳杂环

聚甲基丙烯酸(N-羟基琥珀酰亚胺)酯的簇聚诱导发光研究

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化学学报 2016年第11期74卷 935-941页

作者：宾鑫罗卫剑袁望章张永明上海交通大学化学化工学院上海市电气绝缘与热老化重点实验室上海200240

不含普通发光单元的非典型生色团发光化合物因其基础研究重要性和广泛的应用前景引起了人们的极大兴趣.其中许多化合物还具有独特的聚集诱导发光(Aggregation-induced emission,AIE)特性.然而其发光机理仍然存在争议.在此前的研究中,提... 详细信息

不含普通发光单元的非典型生色团发光化合物因其基础研究重要性和广泛的应用前景引起了人们的极大兴趣.其中许多化合物还具有独特的聚集诱导发光(Aggregation-induced emission,AIE)特性.然而其发光机理仍然存在争议.在此前的研究中,提出了簇聚诱导发光(clustering-triggered emission,CTE)机理,即非典型生色团的簇聚和电子共享来解释这些体系的发光和AIE现象.为进一步验证这一假说,设计合成了不含传统生色团的聚甲基丙烯酸(N-羟基琥珀酰亚胺)酯(PNHSMA).其稀溶液基本不发光,但浓溶液,纳米聚集体,固体粉末均发射蓝光,呈现出AIE性质.通过与其单体甲基丙烯酸(N-羟基琥珀酰亚胺)酯(NHSMA)的发光行为对比及单体单晶结构解析,利用CTE机理很好地解释了其光物理行为.

关键词：聚甲基丙烯酸(N-羟基琥珀酰亚胺)酯聚集诱导发光非典型生色团簇聚诱导发光电子云重叠

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非典型发光化合物的簇聚诱导发光

化学进展 2019年第11期31卷 1560-1575页

作者：陈晓红王允中张永明袁望章华北电力大学先进材料研究院北京102206 上海交通大学化学化工学院上海市电气绝缘与热老化重点实验室上海200240

不含大共轭结构的非典型发光化合物因其理论研究的重要性和潜在应用前景引起研究者的广泛关注。非典型发光化合物的结构通常含有N、O、S、P等杂原子,C≡N、C=O、C=C等不饱和单元,及相应的组合功能团(如羟基、胺基、酯基、酐、酰胺、脲... 详细信息

不含大共轭结构的非典型发光化合物因其理论研究的重要性和潜在应用前景引起研究者的广泛关注。非典型发光化合物的结构通常含有N、O、S、P等杂原子,C≡N、C=O、C=C等不饱和单元,及相应的组合功能团(如羟基、胺基、酯基、酐、酰胺、脲基、肟基、砜基等)。近年来,尽管这一领域正快速发展,其发光机理仍存争议。前期,我们提出了簇聚诱导发光(CTE)机理,即含π电子和/或孤对(n)电子的非典型生色团的簇聚及其带来的空间共轭使体系离域扩展,构象刚硬化;同时,其他分子内/间相互作用也有利于簇生色团的刚硬化,从而易于受激发射。基于CTE机理,本文综述了非典型发光化合物的发光特性,包括浓度增强发光、聚集诱导发光(AIE)、激发波长依赖性及磷光发射。CTE机理可合理解释天然产物、合成化合物、生物分子等不同体系的光物理行为,并可用来指导发现和设计新的非典型发光化合物。本文总结了上述不同体系的发展,并对未来研究进行了展望。

关键词：非典型发光化合物簇聚诱导发光磷光空间共轭构象刚硬化