%0 Journal Article %T Formation and Properties of Organic Long Persistent Luminescence Crystals Containing Benzidine Derivatives by Melt Crystallization %A Norihito Doki %A Kiyoka Maruyama %A Masaaki Yokota %J Advances in Chemical Engineering and Science %P 1-7 %@ 2160-0406 %D 2024 %I Scientific Research Publishing %R 10.4236/aces.2024.141001 %X Organic molecules that exhibit long persistent luminescence (LPL) are rapidly gaining attention for a variety of applications. In this study, organic molecules with simple structures were selected and organic long persistent luminescence (OLPL) crystals were prepared. The crystal structure of the prepared OLPL crystal was elucidated and the guideline for the design of OLPL crystal was clarified. LPL was observed in OLPL crystals prepared with TMB as the guest molecule and 1,2-bis(diphenylphosphino)ethane as the host molecule. XRD measurements of the OLPL crystals suggest that the guest molecule is a solid solution substituted in the stable crystal structure of the host molecule in a lattice-shrinking direction. %K Melt Crystallization %K Host-Guest Chemistry %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=130669