The University of Osaka · 재료과학
수지 유키히 교수의 연구실은 주로 유기 라디칼화학과 분자 전자기학을 중심으로, 안정한 다이래디칼 및 라디칼 이온 쌍의 구조와 성질을 고해상도 분석 기법(예: NMR, EPR, MS)을 통해 규명합니다. 특히, π-결합 다이머, 고효율 전하분리 시스템, 그리고 스핀 상태 전환을 통한 새로운 전자적 기초 메커니즘을 탐구하며, 이는 태양전지 및 스위치 기반 분자 소자 응용에 기여합니다. 연구는 고도로 정교한 분자 설계와 정밀한 분석 기술의 융합을 바탕으로 하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
We have demonstrated the first MS and NMR observation of a face-to-face pi-bonded dimer of an organic radical (pancake-bonded dimer coined by R. S. Mulliken) in solution, using tri-tert-butylated phenalenyl radical 1, a 3-fold symmetric neutral hydrocarbon. In addition to the direct detection of the dimer signal by cold-spray ionization mass spectrometry (CSI-MS), 1H and 13C NMR spectra in solution gave definitive evidence of a well-defined D3d dimer structure with a 12-center-2-electron-long C-
We report a highly efficient charge separation system, D-Pt-A, where D (triphenylamine) and A (naphthalenediimide) are bonded to the Pt moiety through highly twisted phenylene ethynylene linkages. The quantum yields for the formation of the charge-separated state were determined to be nearly unity. The lifetimes of D(+)-Pt-A(-) were approximately 1 micros at room temperature and much longer at low temperature. The spin-correlated radical ion pair was directly observed by means of time-resolved E
We report on the highly compact nitroxide-substituted nitronyl nitroxide 1 and iminonitroxide 2; they have isoelectronic structures with trimethylenemethane. These diradicals are stable under aerated conditions at room temperature and have large positive exchange interactions: J/k(B) = +390 K (H = -2JS(1)(/)(2)·S(1/2)) for 1 and J/k(B) ≈ +550 K for 2.
Spin-state conversion: Oxidation of trinitroxide-trioxytriphenylamine introduces extended π conjugation, resulting in a ground-state spin conversion from the antiferromagnetic coupling in the neutral spin-doublet state to the ferromagnetic coupling in the cation spin-triplet state. The reversible conversion between the two states was confirmed by a change in the UV/Vis absorption under electrochemical oxidative/reductive conditions. Detailed facts of importance to specialist readers are publishe
The recently reported efficient charge-separated system based on bipyridine-diacetylide platinum(ii) complexes was applied to photoelectric conversion systems herein, based on the design and synthesis of two triads: MTA-Pt-NDISAc (3, MTA: dimethoxytriphenylamine, Pt: platinum(ii) complex, NDISAc: thioacetate derivative linked to naphthalenediimide) and MTA-Pt-MNICOOH (4, MNICOOH: naphthaleneimide-4-carboxylic acid). The charge-separated (CS) states of triads 3 and 5 (MOM-protected 4) were effect
