调控动态生长过程以构筑嵌段可换和光谱可调的有机异质结构

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中文摘要：与单一结构相比,有机嵌段异质结构具有特殊的光电性能.然而,有机分子间的相互作用主导了异质结构构建单元的生长顺序,如有机单元A、B会自发形成BAB型结构而不是相反的ABA型结构,不能可控生长.在此,我们提出了次序结晶工程,结合晶种逐步自组装,控制共晶R与共晶N在彼此的两端纵向外延生长,从而精确合成具有可逆嵌段构型的有机嵌段异质结构:RNR和NRN.RNR有机嵌段异质结构,由于其逐渐掺杂的异质结而表现出渐变色的发射和波导特性,而NRN有机嵌段异质结构由于其明显的构筑异质结界限而表现出纯双色发射和波导特性.本工作实现了有机嵌段异质结构中嵌段块的有序可控生长,为未来光子学发展提供了制备合理复杂有机嵌段异质结构的途径.

外文标题：Regulating dynamic growth pathway for constructing organic heterostructures of interchangeable microblocks and adjustable optical output

外文摘要：Organic heterostructures(OHs)with multi-segments exhibit unique optoelectronic properties due to the directional energy transfer between adjacent segments com-pared with single-component structures.Nevertheless,the OHs with a spontaneously formed substructure might not meet the practical application needs.Accordingly,construct-ing the building blocks(crystals X and Y)into rational con-figurations(such as XYX or reversed YXY patterns)at will would greatly promote the development of OHs in optics.Herein,we demonstrate sequential crystallization,combining spontaneous self-assembly and seeded stepwise self-assembly processes,to manipulate longitudinal epitaxial growth of red-emissive fluorene-7,7,8,8-tetracyanoquinodimethane(R)or near-infrared-emissive fluorene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane(N)on each other,resulting in the OHs with interchangeable block patterns:RNR and NRN.The OHs with RNR pattern display gradient-color emission and waveguide property as a result of gradually-doped hetero-junction,while the NRN-pattern OHs exhibit pure dual-color emission and waveguide property due to the well-defined boundary.This work realizes the order-controllable growth of blocks in OHs and affords an avenue to rationally construct complex OHs for future optics development.

外文关键词：

organic heterostructurecharge transfer cocrystalcrystallizationoptical waveguide

作者：

赵帅、许超飞、余悦、夏星宇、王磊、王雪东、廖良生

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作者单位：

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices,Institute of Functional Nano & Soft Materials(FUNSOM),Soochow University,Suzhou 215123,China

Macao Institute of Materials Science and Engineering,Macau University of Science and Technology,Macau 999078,China

关键词：

organic heterostructure charge transfer cocrystal crystallization optical waveguide

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvinceScience and Technology Support Program of Jiangsu ProvinceJiangsu Funding Program for Excellent Postdoctoral TalentCollaborative Innovation Center of Suzhou Nano Science & Technology111 Project Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)Joint International Research Laboratory of Carbon Based Functional Materials and Devices,and Soochow University Tang Scholar

项目编号：

521731772197118552203234BK20221362TJ-2022-002KJS2156

出版年：

2024

DOI：

10.1007/s40843-024-2890-1

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(7)