| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
|
|---|
| Outline of Final Research Achievements |
We have synthesized one-dimensional hydrogen-bonded rhodium(II)-η5-semiquinone complexes [Cp*Rh(η5-p-HQ-Me4)]X (X=PF6 (1), CF3SO3(2)) that exhibits a paraelectric-antiferroelectric second-order phase transition at 237.1 and 207.8 K, respectively. The 13C CP/MAS NMR spectra demonstrate that the proton is dynamically disordered in the RT phase. To maintain short-range protonic correlations, kink defects known as protonic solitons are expected to form topologically on the boundary of short-range order areas. The protonation/deprotonation of [Cp*Rh(η5-p-HQ-Me4)]+ led to hapticity changes of semiquinone ligand accompanied by reduction/oxidation by the π-bonded rhodium fragment, giving stable η6-hydroquinone and η4-benzoquinone complexes, respectively. Therefore, kink defects presumably consist of these stable η6- and η4-coordinated complexes. The generated protonic solitons migrate rapidly in the H-bonded chain through successive proton transfer coupled with electron transfer.
|
