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Updated: Dec 26, 2025

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
Published on: August 19, 2016
Polymorphic chiral squaraine crystallites in textured thin films
Jennifer Zablocki1, Oriol Arteaga2, Frank Balzer3
1Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, Bonn, Germany.
Abstract:
An enantiomerically pure (R)-2-methylpyrrolidine-based anilino squaraine crystallizes in two chiral polymorphs adopting a monoclinic C2 and an orthorhombic P21 21 21 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.
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