[17p-D511-1~15] 22.1 Joint Session M "Phonon Engineering"

[17p-D511-9] Halogen-Species Dependence of Thermophysical Properties of Organic Single Crystals with 2D Molecular Layers Linked through Halogen Contacts

〇Taketo Tano¹, Ryosuke Muraki¹, Ryosuke Takehara¹, Meguya Ryu², Yoshiaki Shoji¹, Junko Morikawa¹, Takanori Fukushima¹ (1.Tokyo Tech, 2.AIST)

Keywords:thermal diffusivity and conductivity, halogen contact, organic single crystal

We prepared single crystals of three halogen-functionalized triptycene derivatives, which provide an isomorphous structure. In these crystals, the triptycene moieties assemble to form 2D layers, which are regularly connected one-dimensionally through halogen contacts. To investigate the relationship between halogen contacts and thermal transport properties, we measured thermal diffusivity, specific heat, density, and thermal conductivity of each single crystal. We found that one of the derivatives having the same halogen species show the highest thermal conductivity along the direction of halogen contacts. In this presentation, we will detail the correlation between structure and thermal conductivity in these organic crystals.