Self-assembly into Polymorphic 2D Nanosheets with Crystallization-Induced Emission Enhancement
作者机构：Centre for Molecular Systems and Organic Devices(CMSOD)Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced MaterialsJiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&TelecommunicationsNanjingJiangsu 210023China
出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)
年 卷 期：2022年第40卷第7期
页 面：832-837页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China(Nos.61604081,61605090,U1301243) the Natural Science Foundation of the Jiangsu Higher Education Institutions(No.16KJB430023) the Doctoral Fund of Ministry of Education of China(No.20133223110007) the Excellent Science and Technology Innovation Team of Jiangsu Higher Education Institutions(2013) the Natural Science Foundation of jiangsu Province(No.BM2012010) the Six Talent Peaks Project of Jiangsu Province(No.XCL-CXTD-009) the Project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions,PAPD(No.YX03002) NUPTSF(Nos.NY215055,NY215061) the Program for Postgraduates Research Innovation in University of Jiangsu Province(No.KYCX200744)
主 题：Polymorphism Self-assembly 2D nanostructures Steric design Crystallization-induced emission enhancement Supramolecular chemistry
摘 要：Organic micro/nanocrystals with polymorphic tailorability and perfect platform to modulate decode the complex relationship among molecular structures,supramolecular/noncovalent interactions,aggregates and exciton ***,we precisely tune the polymorphic two-dimensional organic nanosheets(2DONs)of cyano-spirocyclic aromatic hydrocarbon(2 -CN-SFX),where the crystal growth processes are dominated by precursor *** low concentration(ca.2 mmol/L)affords the rhombus-like nanosheets with monoclinic P21/c space group,in which molecules adopt antiparallel and slipped stacking *** contrast,the high concentration(ca.4 mmol/L)favors herringbone-like molecular packing pattern and then generates shuttle-like nanosheets with monoclinic C2/c space *** above polymorphic nanosheets exhibit unprecedented crystallization-induced emission en-hancement(CIEE)feature that increases the photoluminescence quantum yields(PLQYs)from 16%in solution,21%in amorphous film to 37%-39%in crystalline *** result will offer promising opportunities for nanophotonics and organic intelligent semi-conductors.
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