Polymorphic chiral squaraine crystallites in textured thin films
An enantiomerically pure (R)-2-methylpyrrolidine-based anilino squaraine crystallizes in two chiral polymorphs adopting a monoclinicC2 and an orthorhombic P212121structure, respectively. By various thin-film preparation tech-niques, a control of the polymorph formation is targeted. The local texture...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/174551 |
| Acceso en línea: | https://hdl.handle.net/2445/174551 |
| Access Level: | acceso abierto |
| Palabra clave: | Dicroisme circular Difracció de raigs X Circular dichroism X-rays diffraction |
| Sumario: | An enantiomerically pure (R)-2-methylpyrrolidine-based anilino squaraine crystallizes in two chiral polymorphs adopting a monoclinicC2 and an orthorhombic P212121structure, respectively. By various thin-film preparation tech-niques, a control of the polymorph formation is targeted. The local texture ofthe resulting textured thin films is connected to the corresponding opticalproperties. Special attention is paid to an unusual Davydov splitting, the aniso-tropic chiroptical response arising from preferred out-of-plane orientation ofthe crystallites, and the impact of the polymorph specific excitonic coupling. |
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