Synthesis of Novel Polymers Having a P-Chiral Atom
Step by step reaction of chiral bisphosphine gave the polymers having a P-chiral atom in the main chain. Because of the "step by step reaction", we were able to obtain the oligomers at each stage and investigated the strict structures and their effect to high dimension structures. In addition, we were able to synthesize first 12-phosphacrown-4 by intramolecular cyclization reaction of the P-chiral atom containing oligomer.
Fig. 1
Synthesis and Application of Electron-Donating Poly(dithiafulvene)s
We succeeded in the synthesis of novel π-conjugated polymers having electron-donating dithiafulvene units in the main chain by the addition reaction of aldothioketenes derived from π-conjugated diynes with their alkynethiol tautomers. Their electron-donating ability can be applied to the various unique electronic systems. Now, we are investigating the aggregation behaviors of PEG-substituted oligo(dithiafulvene)s.
Fig. 2
Synthesis of π-Conjugated Polymers Based on Heterocyclopentadiene Skeletons
π-Conjugated polymers bearing a heterocyclopentadiene unit, such as thiophene (S), pyrrole (N), and silole (Si), have been synthesized and their interesting properties have been investigated in detail. Recently, we reported the first preparation of well-defined phosphole (P) containing π-conjugated polymers, which were efficient emitters of green and blue light. Now, we are trying to synthesize the stibole (Sb) and bismole (Bi) containing conjugated polymers.
Fig. 3
Synthesis of Organometallic Polymers
We synthesized novel π-conjugated polymers having a (arene)Cr(CO)3 unit as an acceptor in the main chain. The obtained polymer showed redox activity and conductivity derived from the electron withdrawing Cr(CO)3 moiety.
Fig. 4