[17p-W2_402-1~14] 12.1 Fabrications and Structure Controls

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17p-W2_402-5] Optical Control of Polymorphism and Emission Color in TPE Derivative Crystals

〇(D)Wataru Fushimoto¹, Ting-Chu Wang², Fumitaka Ishiwari³, Takanori Fukushima^4,5,6, Hiroshi Yoshikawa¹, Teruki Sugiyama^2,7 (1.UOsaka, 2.NYCU, 3.TMU, 4.Science Tokyo CLS, 5.Science Tokyo, 6.Science Tokyo ASMat, 7.NAIST)

Keywords:

Aggregation-induced emission,laser trapping,TPE

We achieved optical control over the crystal polymorph selectivity of an AIE-active TPE derivative using optical tweezers. A slight increase in solution pH reduced the crystallization induction time and successfully improved the selectivity of the metastable form (blue-emitting) while suppressing the formation of the most stable form (green-emitting). We report these findings based on in situ spectroscopic measurements, focusing on the impact of controlling electrostatic repulsion within aggregates on the nucleation environment.