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以Tröger碱大环为例分析多手性中心大环的立体异构体
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作者 石聪浩 王冉冉 +1 位作者 强琚莉 王乐勇 《大学化学》 CAS 2024年第7期394-397,共4页
立体异构现象是有机化学中重要的异构现象之一,具有重要的研究和教学意义。本文将以Tröger碱单元构筑的超分子大环为例,结合实验结果,探讨具有多手性中心大环的立体异构体。
关键词 立体异构体 手性大环 Tröger碱
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High-resolution and instantaneous imaging of latent fingerprints 被引量:1
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作者 Ming Cheng juli jiang +1 位作者 Jean-Claude Chambron Leyong Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第4期1-2,共2页
Fingerprints can serve as an information storage platform for individuals and play an important role in forensic investigation and security[1].Most of them are invisible to the naked eye and are called latent fingerpr... Fingerprints can serve as an information storage platform for individuals and play an important role in forensic investigation and security[1].Most of them are invisible to the naked eye and are called latent fingerprints(LFPs).Conventional imaging techniques suffer from limitations like low resolution and sensitivity[2],restricting the recognition of LFPs to macroscopic features,such as shape,core,ending,bifurcation,island,pores,and so on,which correspond to levels 1 and 2.Features of level 3 including ridges and their edges,are challenging to recognize. 展开更多
关键词 LATENT RESOLUTION restrict
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Chiral selection of Troger's base-based macrocycles with different ethylene glycol chains length in crystallization
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作者 Haohui Feng Yuan Chen +6 位作者 Ranran Wang Pengbo Niu Conghao Shi Zhen Yang Ming Cheng juli jiang Leyong Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第7期127-130,共4页
In the present work,two Troger's base-based macrocycles(TBBMs)with different bridging ethylene glycol chains(T1,n=1;T3,n=3)were successfully synthesized and studied via the crystal analysis.These two TBBMs possess... In the present work,two Troger's base-based macrocycles(TBBMs)with different bridging ethylene glycol chains(T1,n=1;T3,n=3)were successfully synthesized and studied via the crystal analysis.These two TBBMs possess rare rectangular-like cavities and show chiral selection during the crystallization.T1with short glycol chain(n=1)crystallized as racemates,while T3 with long glycol chain(n=3)was found as meso isomer.In contrast to T1 and T3,for T2(n=2)both rac-T2 and meso isomer R2NS2N-T2has been observed in our previous report.Thus,the synthesis of new TBBMs T1 and T3 with different bridging ethylene glycol chains not only makes the study of TBBMs more systematically,but also helps to understand the relationship between the size of the rectangular cavity and the chiral selection of Troger's base-based macrocycles during their crystallization. 展开更多
关键词 Supramolecular macrocycle Tr?ger’s base Chiral selection Rectangular cavity Glycol chains
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