![](images/sub_header.jpg)
Research1
New Functional Photo-reactive Molecules
![](images/r1.jpg)
Proc. Jpn. Acad., Ser. B, 2001, 30-35
Photochromic molecules undergo reversible photo-induced isomerization under light irradiation. We explore new photoreactive molecules which exhibit reversible switching and manipulating various chemical functionality. We also study on new photopolymer systems, radio-sensing materials and photo-patterning materials.
1. Structure and Photoreactivity of Triangle Terarylenes
![](images/r2.jpg)
Eur. J. Org. Chem., 2007, 3212-3218
Terarylenes undergo reversible photocyclization under UV light irradiation and three aromatic units are collapsed with one-photon photoexcitation.
2. Terarylenes of High Photosensitivity
![](images/r3.jpg)
We have developed photochromic terarylene showing "Photon-Quantitative Reaction", which means almost 100% of photochemical quantum yield. In the new substance, unique S/N and CH/Ninteraction operate to stabilize the photo-reactive conformation.
3. New Photo-Acid Generator, PAG, of high Photosensitivity and Chemical Reactivity
![](images/r4.jpg)
Chem. Commun., 2017, 53, 4339-4341.
As the new PAG, the new substances release strong acids from their ring-closed forms, which trigger polymerization of epoxy monomers forming photopatternings.
![](images/r5.jpg)
![](images/r6.jpg)
We delivered highly reactive Lewis Acid after light irradiation to the newly synthesized Photo Lewis Acid Generator, PLAG, which triggers even Mukaiyama-Aldhol reaction under light irradiation.
4. New Redox Cascade Molecules
![](images/r7.jpg)
J.Amer.Chem.Sic.,2011.
We demonstrated terarylene showing efficient ring-opening reactivity triggered by oxidization. The redox cascade reaction promotes amplifiedring-opening reaction, for even 1000 molecules after one electron oxidation.
![](images/r8.jpg)
![](images/r9.jpg)