A1 Journal article (refereed)
Polymorphic chiral squaraine crystallites in textured thin films (2020)

Zablocki, J., Arteaga, O., Balzer, F., Hertel, D., Holstein, J. J., Clever, G., Anhäuser, J., Puttreddy, R., Rissanen, K., Meerholz, K., Lützen, A., & Schiek, M. (2020). Polymorphic chiral squaraine crystallites in textured thin films. Chirality, 32(5), 619-631. https://doi.org/10.1002/chir.23213

JYU authors or editors

Publication details

All authors or editors: Zablocki, Jennifer; Arteaga, Oriol; Balzer, Frank; Hertel, Dirk; Holstein, Julian J.; Clever, Guido; Anhäuser, Jana; Puttreddy, Rakesh; Rissanen, Kari; Meerholz, Klaus; et al.

Journal or series: Chirality

ISSN: 1520-636X

eISSN: 0899-0042

Publication year: 2020

Volume: 32

Issue number: 5

Pages range: 619-631

Publisher: John Wiley & Sons

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1002/chir.23213

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68217

Abstract

An enantiomerically pure (R)‐2‐methylpyrrolidine‐based anilino squaraine crystallizes in two chiral polymorphs adopting a monoclinic C2 and an orthorhombic P212121 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.

Keywords: organic compounds; thin films; semiconductors; polarimetry; microscopy; x-ray crystallography

Free keywords: circular dichroism; Davydov splitting; imaging Mueller matrix polarimetry; polarized spectro-microscopy; X-ray diffraction

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Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1