Assembly–disassembly switching of chiral sheet assembly for controlled circularly polarized luminescence,Journal of Polymer Science

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Assembly–disassembly switching of chiral sheet assembly for controlled circularly polarized luminescence
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2023-01-19 , DOI: 10.1002/pol.20220745
Longlong Dong ₁ , Dawoon Lee ₂ , Yongju Kim _{2,

3} , Myongsoo Lee ₁

Affiliation

Although substantial advances have been made regarding synthetic chiral assemblies, obtaining the two-dimensional (2D) system with a sophisticated supramolecular chirality remains challenging. Herein, we report the switchable supramolecular chiral 2D materials via donor-acceptor interaction between a pyrene amphiphile and 7,7,8,8-tetracyanoquinodimethane (TCNQ). The resulting supramolecular chiral sheets spontaneously disassemble when TCNQ is irreversibly photo-reduced to its anion. Subsequent additions of TCNQ drive the disassembled molecules to repeatedly form optically active sheet structures, demonstrating that the assembled materials exist transiently only while TCNQ is supplied. The chiral sheets emit intense circularly polarized light with a large luminescence dissymmetric factor (g_lum).

中文翻译：

用于受控圆偏振发光的手性片组件的组装-拆卸切换

尽管在合成手性组装方面取得了实质性进展，但获得具有复杂超分子手性的二维 (2D) 系统仍然具有挑战性。在此，我们通过芘两亲物和 7,7,8,8-四氰基喹啉二甲烷 (TCNQ) 之间的供体-受体相互作用报告了可切换的超分子手性二维材料。当 TCNQ 不可逆地光还原为其阴离子时，产生的超分子手性片会自发分解。随后添加的 TCNQ 驱动分解的分子重复形成光学活性片结构，表明组装材料仅在提供 TCNQ 时短暂存在。手性片发出强烈的圆偏振光，具有较大的发光不对称因子 ( g _lum )。

更新日期：2023-01-19

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