Soft Crystals: Science and Photofunctions of Flexible-response Systems with High Order
Department of Chemistry, Inorganic and Analytical Chemistry
Construction of Stimulus-responsive Metal Complexes and Creation of Photofunctionalties
|Field||Coordination Chemistry, Photochemistry, Structural Chemistry|
|Keyword||Platinum Complexes, Copper Complexes, Assemley-induced Luminescence, Soft Crystals, Vapochromism, Photofunction, Crystal Structures, Chromic Metal Complexes, Stimulus Response, Environmental Sensitivity|
Introduction of Research
Photofunctional metal complexes have attracted much attention as luminescent materials with high efficiency and photosensitizers for multi-electron transfer systems. In my research, I focus on the construction and the elucidation of the properties of luminescent chromic complexes which exhibit remarkable changes in luminescence color in response to gentle stimuli by the sophisticated control of intra- and inter-molecular interactions. In particular, using assembly-induced luminescent platinum(II) complexes, various vapochromic systems which exhibit drastic luminescence changes in response to particular vapors. For example, the crystalline sample of a double-decker platinum(II) complex exhibited remarkable luminescence changes in the presence of organic vapors such as acetonitrile or ethanol (Figure 1). The mechanism of the distinctive color change has been clarified by X-ray analysis through a single-crystal-to-single-crystal (SCSC) transformation to be changes in the intermolecular Pt···Pt interactions. In addition, intense red-blue emission for self-assembled Pt(II) complexes has been achieved by the fine control of the stacking structure (Figure 2). Furthermore, various vapochromic systems have been developed to construct chemistry of stimulus-responsive metal complexes: vapochromic platinum(II) complexes exhibiting self-healing and hysteresis of crystal structures (Figure 3), Copper(I) complexes which exhibit vapochromic luminescence (Figure 4), methanol-triggered vapochromism coupled with solid-state spin switching in a Ni(II)-quinonoid complex (Figure 5).
On the basis of these achievements, a new project, Soft Crystals: Science and Photofunctions of Flexible-responsive Systems with Higher-order has started in 2017 as one of KAKEBNHI projects for Scientific Research on Innovative Areas. The project aims three targets: Establishment of the science based on deep investigation of the phenomena, development of new materials based on the design principle of soft crystals, and acquirement of keys toward innovation.
|Academic degree||Ph. D.|
|Affiliated academic society||Chemical Society of Janan, Japan Society of Coordination Chemistry, The Japanese Photochemistry Association, The Japan Society for Analytical Chemistry, Japan Society for Molecular Science, The American Chemical Society|
|Project||JSPS KAKENHI Scientific Research on Innovative Areas, “Soft Crystals: Science and Photofunctions of Flexible-response Systems with High Order ”|
|Room address||Science Building 7 7-510|