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Late Breaking Posters
Day 1, June 22（Sun.）
Room P (Maesato East, Foyer, Ocean Wing)
- 1P-LB-12
MALDI-Spiral-TOFMS Analysis of Photochromic Diarylethene Derivatives with Labile Groups and Their Photopolymerization Reactions
(NAIST)
oTaichi Muto, Kaho Irie, Chigusa Goto, Yoshiko Nishikawa, Tsuyoshi Kawai
Photochromic compounds exhibit reversible structural and electronic changes upon light irradiation. Among them, diarylethenes are well-known for their unique photoresponsive properties. These compounds undergo a 6π-electrocyclization reaction upon UV irradiation, converting from the open-ring form (O) to the closed-ring form (C). The resulting cyclohexadiene-type closed form (C) can spontaneously undergo heterolytic bond dissociation, yielding a carbocation (C+) and a counter anion (R-). In our previous studies using MALDI-MS, we demonstrated that the detection of the C+ species depends on the nature of the detachable substituent R in the diarylethene derivatives. In this study, we aim to clarify the ionization and fragmentation mechanisms occurring during the MALDI-TOF process. To gain deeper insights, we also compare the results obtained from other ionization methods such as ESI and EI. Furthermore, since the C+ and R- species generated from diarylethenes were found to catalyze polymerization reactions, we will also discuss these findings.