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Pyridine-induced interfacial structural transformation of tetraphenylethylene derivatives investigated by scanning tunneling microscopy

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Nano Research 2018年第11期11卷 5823-5834页

作者： Xuan Peng Linxiu Cheng Xiaoyang Zhu Yanfang Geng Fengying Zhao Kandong Hu Xuan Guo Ke Deng Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST) No. 1 ZhongguancunBeiyitiao Beijing 100190 China Jiangxi College of Applied Technology Ganzhou 341000 China Engineering Research Center of Nano-Geo Materials of Ministry of Education China University of Geosciences Wuhan 430074 China

The two-dimensional self-assembly behaviors of tetraphenylethylene (TPE) molecules are significant for further applications, but reports are rare. The self-assembled structures of two C2-symmetry TPE derivatives (H4TCPE and H4ETTC) possessing propeller structures and their stimulus responses to the addition of vinylpyridine derivatives were thoroughly studied with the assistance of scanning tunneling microscopy (STM) technique in combination with density functional theory (DFT) calculations. Although their chemical structures were similar, the H4TCPE and H4ETTC molecules self-assembled into closely packed lamellar and quadrilateral structures, respectively, at the 1-heptanoic acid/HOPG interface. After the addition of pyridine derivatives (DPE, PEBP-C4, and PEBP-C8), H4TCPE and H4ETTC showed different responsiveness resulting in different co-assembly structures. The results indicated that the structures of pyridine derivatives—including backbones and substituents—affected the intermolecular interactions of both H4TCPE/pyridine and H4ETTC/pyridine systems. The modification of the self-assembly behaviors of propeller-shaped H4TCPE and H4ETTC would contribute to the construction of more complex multilevel nanostructures.

关键词： tetraphenylethylene derivatives propeller structures self-assembly pyridine hydrogen bonding scanning tunneling microscopy (STM)

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Enantioselective recognition based on aggregation-induced emission

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Chinese Chemical Letters 2023年第6期34卷 70-80页

作者： Pu Chen Panpan Lv Chang-Sheng Guo Rui-Peng Wang Xiaolong Su Hai-Tao Feng Ben Zhong Tang AIE Research Center Shaanxi Key Laboratory of PhytochemistryCollege of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China Shenzhen Institute of Aggregate Science and Technology School of Science and EngineeringThe Chinese University of Hong KongShenzhen 518172China

Chirality is one of the most important features of the *** recognition of enantiomers plays significant roles in the field of life science,pharmaceutical analysis and food *** various recognition methods,fluorescence spectrometry has attracted much attention of researchers thanks to its high sensitivity and easy *** with traditional fluorescent probes,chiral molecules with aggregation-induced emission(AIE)have drawn increasing interests due to their huge potential in high-efficiency chemo/biosensors and solid *** AIE luminogens(AIEgens)can not only discriminate two enantiomers with excellent enantioselectivity,but also show general applicability for many chiral analytes,such as chiral acids,amino acids,amines,*** this review,we mainly summarized the recent development of chiral probes with AIE properties,including chiral tetraphenylethylene(TPE)derivatives,α-cyanostilbene derivatives,Schiff base derivatives and other *** synthetic routes,recognition capabilities and possible working mechanisms were well *** is envisioned that the present review can give some significant guidance for design and synthesis of chiral AIEgens with good enantioselectivity and inspire more readers to join the research of chiral AIE.

关键词： Aggregation-induced emission Enantioselective recognition Fluorescent probe Host-guest interaction tetraphenylethylene derivatives α-Cyanostilbene derivatives Schiff base derivatives

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