Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, Bonn, Germany.
IN2UB, Department De Física Aplicada, Universitat de Barcelona, Barcelona, Spain.
Chirality. 2020 May;32(5):619-631. doi: 10.1002/chir.23213. Epub 2020 Mar 10.
An enantiomerically pure (R)-2-methylpyrrolidine-based anilino squaraine crystallizes in two chiral polymorphs adopting a monoclinic C2 and an orthorhombic P2 2 2 structure, respectively. By various thin-film preparation techniques, a control of the polymorph formation is targeted. The local texture of the resulting textured thin films is connected to the corresponding optical properties. Special attention is paid to an unusual Davydov splitting, the anisotropic chiroptical response arising from preferred out-of-plane orientation of the crystallites, and the impact of the polymorph specific excitonic coupling.
(R)-2-甲基吡咯烷基苯胺基方酸的对映体纯结晶为两种手性多晶型物，分别采用单斜 C2 和正交 P222 结构。通过各种薄膜制备技术，目标是控制多晶型物的形成。所得织构薄膜的局部纹理与相应的光学性质相关。特别关注异常的 Davydov 分裂、源于晶畴优选的面外取向的各向异性手性响应以及多晶型特定激子耦合的影响。
