维普中文期刊产品整合服务

Keto-form directed hierarchical chiral self-assembly of Schiff base derivatives with amplified circularly polarized luminescence

查看全文 作　　者：Yimeng [1]Sun;Yuqian [2]Jiang;Jian [2]Jiang;Tiesheng [1]Li;Minghua [1,3,4]Liu 高影响力作者 机构地区：[1]Green Catalysis Center,and College of Chemistry,Zhengzhou University,Zhengzhou 450001,China;[2]Key Laboratory of Nanosystem and Hierarchical Fabrication,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China;[3]National Laboratory for Molecular Science(BNLMS),CAS Laboratory of Colloid,Interface and Chemical Thermodynamics,Institute of Chemistry,Chinese Academy of Science,Beijing 100190,China;[4]University of Chinese Academy of Sciences,Beijing 100190,China高影响力机构 出　　处：《Chinese Chemical Letters》索引2024年第35卷第1期,共5页高影响力期刊 基　　金：National Natural Science foundation of China(Nos.21861132002,21773043,21973020 and 21890734). 摘　　要：While enol-keto tautomerism has attracted great interest in Schiff bases and related compounds in solution and crystal states,the self-assembly of energy-unfavored keto form were scarcely investigated.Here,we report a keto-form directed self-assembly of a naphthalene-attached enantiomeric N-salicylideneanil analog L/DGG-Nap accompanied with a significantly amplified circularly polarized luminescence(CPL).It was found that LGG-Nap exists as a mixture of enol and keto form in monomer at a diluted toluene solution.The increment of the concentrations leads to the formation of predominated keto form,which subsequently triggers the self-assembly.Cryo-transmission electron microscopy(Cryo-TEM)revealed that a hierarchical assembly process happened upon increasing the concentration of LGG-Nap in toluene.Individual nanofibers formed at 1×10-4 mol/L and transferred into helical nanofiber bundles in 5×10-3 mol/L.Interestingly,while these is nearly no circular dichroism(CD)or CPL in the monomeric solution,the assembly showed strong CD and CPL.Remarkably,the dissymmetry factor(glum)was significantly amplified from zero in solution through the 0.005 in individual nanofiber to 0.1 in nanofiber bundles.This work demonstrates that the enol-keto tautomerism can be broken and trigger the self-assembly upon increasing the concentration,which can subsequently direct the chiral self-assembly and significantly amplify the dissymmetry factor of assembled CPL materials. 关 键 词：Enol-keto tautomerism Chiral self-assembly Schiff base Circularly polarized luminescence Nanofiber bundle
相关文献

参考文献(67)

引证文献(1)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费