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Description:

Hexagonal single crystals of perylene were grown on a substrate by solution evaporation. Fluorescence microscopy images showed patterned heterogeneous domains with different fluorescence colors. Polarized ultra-low-frequency Raman microscopy revealed that the crystal structure is homogeneous throughout the entire crystal despite the domains observed in the fluorescence images. We concluded that hexagonal crystals were formed by the further growth of the rhombic beta-crystal, which is one of the two polymorphs of the perylene crystal. This mechanism explains the formation of domains with different crystal qualities, resulting in different fluorescence colors.

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• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Polymorphism, Perylene crystal, Fluorescence microscopy, Ultralow-frequency Raman microscopy, Crystal quality

Date published: 2024-03-24

Publisher: Elsevier BV

Journal:

• Chemical Physics Letters (ISSN: 00092614) vol. 843 141232

Funding:

• Japan Society for the Promotion of Science 21  K05045

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4843

First published URL: https://doi.org/10.1016/j.cplett.2024.141232

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Updated at: 2024-10-11 16:19:29 +0900

Published on MDR: 2026-03-24 08:25:11 +0900