Presentation Information
[2P15]Nanoscale Distribution of Thermally Converted Intermediates in Benzoporphyrin Precursor Thin Films Revealed by Atomic Force Microscopy–Based Infrared Spectroscopy
*Takayuki Oka1, Nobutaka Shioya1, So Ueno1, Mitsuaki Yamauchi1, Hiroko Yamada1, Takeshi Hasegawa1 (1. Institute for Chemical Research, Kyoto University)
To enable large-area fabrication of organic electronic materials, various film processing techniques have been developed; however, many practical π-conjugated molecules exhibit poor solubility, limiting the applicability of solution coating. One effective solution is the thermal conversion of soluble precursor thin films. Benzoporphyrins (BP), a class of promising organic semiconductors, can be formed through such thermal reactions from precursor (CP) films. While previous studies have explored the overall reaction processes, little attention has been paid to the spatial distribution of reaction intermediates. In this study, we employed atomic force microscopy–based infrared spectroscopy (AFM-IR) to investigate the nanoscale distribution of these intermediates. Our findings reveal, for the first time, the formation of BP-specific nanostructures and demonstrate how thermal conversion reactions influence the morphology and structural evolution of BP thin films.