九州大学 · Materials Science
요시오 히사에다 교수의 연구실은 유기 광물성 물질과 분자 설계를 기반으로 한 고기능성 광학 소재의 개발에 중점을 두고 있습니다. 특히, 비극성 고분자 및 유기 분자의 상호작용을 제어하여 빛을 발하는 물질의 색상, 강도, 안정성을 정밀하게 조절하는 분야에서 두드러진 성과를 내고 있습니다. 연구는 주로 광발광, 색소변색, 압력-색소반응성 물질, 그리고 분자 조립 기반의 크리스탈 엔지니어링을 포함합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
The electrochemical trifluoromethylation and perfluoroalkylation of aromatic compounds mediated by a vitamin B<sub>12</sub> derivative as a cobalt-based catalyst has been developed. The Co(i) species of a vitamin B<sub>12</sub> derivative, prepared by controlled-potential electrolysis at -0.8 V vs. Ag/AgCl in methanol, reacted with R<sub>f</sub>I (R<sub>f</sub> = CF<sub>3</sub>, n-C<sub>3</sub>F<sub>7</sub>, n-C<sub>4</sub>F<sub>9</sub>, n-C<sub>8</sub>F<sub>17</sub>, and n-C<sub>10</sub>F<sub>2
A mini-sensor array based on side-chain engineering of NDI derivatives achieved unique vapochromic/vapofluorochromic behaviors for aromatic vapors.
New chiroptical chromophores, dinuclear triple-stranded helicates, composed of tetradentate ligands with aluminum(III) ions, are described. These are synthesized in two steps using inexpensive pyrrole derivatives, hydrazine, and aluminum chloride. These molecular architectures (ALPHY) show multi-color (cyan, yellow, and orange) photoluminescence in solution and in the solid-state, which depends on the substituents of the ligands. The photoluminescence quantum yields of helicates were up to 54 %.
Crystal engineering of three-component crystals with guest-dependent photoluminescence switching, including (i) crystallization-induced emission enhancement, (ii) intermolecular charge-transfer emission, and (iii) room-temperature phosphorescence under ultraviolet irradiation, was demonstrated. This strategy was based on the confinement of aromatic guests in a supramolecular host (denoted as EBPDI-TPFB) composed of 5,5'-(ethyne-1,2-diyl)bis(2-pyridin-3-yl-isoindoline-1,3-dione (EBPDI) with two t
A series of multi-color and white-light photoluminescence host/guest cocrystals were prepared by cooperative multi-molecular assemblies.
Abstract The distinct piezochromic luminescent responses of charge−transfer inclusion crystals, which consist of small aromatic guest molecules with naphthalenediimide derivatives, are reported. Reversible multichromism is observed over the entire visible region in response to high pressure, whereas a weak response to mechanical grinding is evident. High‐pressure single‐crystal X‐ray diffraction analysis and TD‐DFT calculations clearly suggest that high compression induces a closer arrangement w
The electrolytic reductive dechlorination of 1,1-bis(p-chlorophenyl)-2,2,2-trichloroethane (DDT) in the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF(4)]) in the presence of a cobalamin derivative afforded 1,1'-(ethylidene)bis(4-chlorobenzene)(DDO) and 1,1'-(ethenylidene)bis(4-chlorobenzene)(DDNU) with 1,1'-(2-chloroethylidene)bis(4-chlorobenzene)(DDMS); the enhanced reactivity, as well as the recyclability of the cobalamin derivative catalyst in IL, makes the presen
Invited for the cover of this issue is Toshikazu Ono, Yoshio Hisaeda and co-workers at Kyushu University and their collaborators at Ochanomizu University, Chuo University, and Institute for Molecular Science. The image depicts a molecular assembly structure shining like a jewel, glowing in the red-to-near infrared region. Read the full text of the article at 10.1002/chem.202100906.
A new bio-inspired system composed of a vitamin B12 derivative and Rose Bengal, catalyzed the dehalogenations of various toxic alkyl halides such as 1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) via a noble-metal-free and visible-light-driven process. This system also catalyzed radical-involved organic reactions such as the 1,2-migration of acyl groupvia a tin-free process.
