Kyushu University · 재료과학
오타니 라오 교수의 연구실은 분자자기학과 협동결합체를 중심으로, 스핀전이를 제어할 수 있는 다공성 금속유기구조체를 개발하고 있습니다. 특히, 계면활성제, 할로겐, 유기분자 등 다양한 게스트 물질이 호스트 프레임워크의 스핀 상태와 전이 온도에 미치는 영향을 정밀하게 조절하는 데 초점을 맞추고 있으며, 이는 스마트 재료 및 센서 응용에 기여합니다. 또한, 열팽창 제어 및 구조적 다이나믹스를 조절하는 복합 네트워크 구조의 설계에도 기여하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Precise control of spin transition temperature (T(c)) is one of the most important challenges in molecular magnetism. A Hofmann-type porous coordination polymer {Fe(pz)[Pt(II)(CN)(4)]} (1; pz = pyrazine) exhibited cooperative spin transition near room temperature (T(c)(up) = 304 K and T(c)(down) = 284 K) and its iodine adduct {Fe(pz)[Pt(II/IV)(CN)(4)(I)]} (1-I), prepared by oxidative addition of iodine to the open metal sites of Pt(II), raised the T(c) by 100 K. DSC and microscopic Raman spectra
Abstract The host–guest composites of Hofmann‐type iron(II) spin‐transition (ST) porous coordination polymers incorporating guest molecules show guest‐dependent ST behavior in accordance with the respective guest species, which may be a gas, solvent, halogen, or organic molecule. The guest also works as a chemical stimulant to switch the spin state of the host between high and low spin at room temperature. In this review, we discuss guest properties including size, shape, flexibility, chemical p
Abstract Two 2D Hofmann‐type spin‐crossover coordination polymers, [Fe(stpy) 2 Pt(CN) 4 ] · 0.5MeOH (stpy = 4‐styrylpyridine; 1 ) and [Fe(pep) 2 Pt(CN) 4 ] {pep = 4‐(2‐phenylethyl)pyridine; 2 }, have been prepared by using long co‐ligands with different flexibilities. These compounds form 3D interdigitate structures based on 2D layers extended by Pt–CN–Fe linkages with different interlayer structures depending on the nature of the axial co‐ligand. The stpy co‐ligand forms one‐directional π–π net
Subarachnoid extension of the hematoma on CT strongly indicates a non-hypertensive cause, and more specifically, it suggests lobar ICH caused by vascular abnormalities.
The ability to tune physical properties is attractive for the development of new materials for myriad applications. Understanding and controlling the structural dynamics in complicated network structures like coordination polymers (CPs) is particularly challenging. We report a series of two-dimensional CPs [Mn(salen)]<sub>2</sub>[M(CN)<sub>4</sub>]· xH<sub>2</sub>O (M = Pt (1), PtI<sub>2</sub> (2), and MnN (3)) incorporating zigzag cyano-network layers that display composition-dependent anisotro
Zero in-plane thermal expansion (TE) in a two-dimensional (2D) coordination polymer is demonstrated. The combination of components that expand and those that shrink into zigzag layers results in no net area change in the 2D materials with temperature. Single crystals of [Mn(salen)]<sub>2</sub>[Mn(N)(CN)<sub>4</sub>(guest)] (salen = N,N'-ethylenebis(salicylideneaminato), guest = MeOH and MeCN) were prepared, and variable-temperature single-crystal X-ray structural analyses demonstrated that these
Metal node design is crucial for obtaining structurally diverse coordination polymers (CPs) and metal-organic frameworks with desirable properties; however, Fe<sup>II</sup> ions are exclusively six-coordinated. Herein, we present a cyanide-bridged three-dimensional (3D) CP, FePd(CN)<sub>4</sub> , bearing four-coordinate Fe<sup>II</sup> ions, which is synthesized by thermal treatment of a two-dimensional (2D) six-coordinate Fe<sup>II</sup> CP, Fe(H<sub>2</sub> O)<sub>2</sub> Pd(CN)<sub>4</sub> ⋅4
Recently, non-crystalline coordination materials have been shown to represent a versatile class of functional materials. However, such materials incorporating metal complex clusters have remained largely unexplored. Herein, we demonstrate that a luminescent tetranuclear ReV cluster melts at 489 K, with the cluster structure being maintained in the corresponding supercooled ionic liquid phase.
