Masako Kato

A new material concept of soft crystals is proposed. Soft crystals respond to gentle stimuli such as vapor exposure and rubbing but maintain their structural order and exhibit remarkable visual changes in their shape, color, and luminescence. Various interesting examples of soft crystals are introduced in the article. By exploring the interesting formation and phase-transition phenomena of soft crystals through interdisciplinary collaboration, new materials having both the characteristics of ord

Remarkable vapochromic effects are observed in a dinuclear platinum(II) complex, where changes in luminescence are facilitated in the presence of solvated organic molecules, such as acetonitrile and ethanol (see scheme). Supporting information for this article is available on the WWW under http://www.angewandte.org or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missi

Abstract Square-planar platinum(II) complexes often exhibit intense color and luminescence when they are stacked via self-assembly or bridging by ligands. The origin of the color and luminescence are the metal–metal electronic interactions, and thus, remarkable changes in color (i.e., chromism) are expected by controlling the Pt···Pt interactions. The molecular arrangement of the assembled complex systems is sensitive to environmental factors such as temperature, pressure, solvent, and vapor. Th

Simple mononuclear Cu(I)-halide complexes, [CuX(PPh3)2(4-Mepy)] (X = Cl(-), Br(-), I(-); PPh3 = triphenylphosphine; 4-Mepy = 4-methylpyridine), were prepared. They exhibit blue light emission, with extremely high photoluminescence quantum yields approaching 100% in the crystals. Emission lifetime analyses and density functional theory calculations revealed that the bright blue light emission at room temperature is mainly delayed fluorescence originating from the singlet metal-to-ligand charge tr

Orange-red crystals of [Pt(CN)2(bpy)] (bpy = 2,2‘-bipyridine) and [Pt(CN)2(i-biq)] (i-biq = 3,3‘-biisoquinoline) show completely different temperature-dependence of emission behavior which has been explained in terms of the characteristic change of each crystal structure based on the platinum−platinum and ligand π−π interactions.

The synthesis and photophysical properties of two luminescent Cu^I coordination polymers, [Cu₂ I₂ (PPh₃ )₂ (3-tpyb)]_n and [Cu₂ I₂ (PPh₃ )₂ (4-tpyb)]_n (Cu-3-tpyb and Cu-4-tpyb; PPh₃ =triphenylphosphine, m-tpyb=1,3,5-tris(m-pyridyl)benzene (m=3, 4)), are described. X-ray structural analysis indicated that one-dimensional coordination chains comprising rhombic {Cu<sub>2

A series of assembled Pt^II complexes comprising N-heterocyclic carbene and cyanide ligands was constructed using different substituent groups, [Pt(CN)₂ (R-impy)] (R-impyH⁺ =1-alkyl-3-(2-pyridyl)-1H-imidazolium, R=Me (Pt-Me), Et (Pt-Et), ⁱ Pr (Pt-ⁱ Pr), and ^t Bu (Pt-^t Bu)). All the complexes exhibited highly efficient photoluminescence with an emission quantum yield of 0.51-0.81 in the solid state at room temperature, or

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFacile carbon dioxide uptake by zinc(II)-tetraazacycloalkane complexes. 2. X-ray structural studies of (.mu.-monomethyl carbonato)(1,4,8,11-tetraazacyclotetradecane)zinc(II) perchlorate, bis(.mu.-monomethyl carbonato)tris[(1,4,8,12-tetraazacyclopentadecane)zinc(II)] perchlorate, and (monomethyl carbonato)(1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane)zinc(II) perchlorateMasako Kato and Tasuku ItoCite this: Inorg. Chem. 1985, 24, 4, 509–514Publ

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFacile carbon dioxide uptake by zinc(II)-tetraazacycloalkane complexes. 1. Syntheses, characterizations, and chemical properties of (monoalkyl carbonato)(tetraazacycloalkane)zinc(II) complexesMasako Kato and Tasuku ItoCite this: Inorg. Chem. 1985, 24, 4, 504–508Publication Date (Print):February 1, 1985Publication History Published online1 May 2002Published inissue 1 February 1985https://pubs.acs.org/doi/10.1021/ic00198a015https://doi.org/10.1021/ic0019

A novel platinum(II)-diimine complex, [Pt(CN)2 (H2 dcphen)] (1; H2 dcphen=4,7-dicarboxy-1,10- phenanthroline), was synthesized and its vapochromic shape-memory behavior was evaluated. The as-synthesized amorphous purple solid, [Pt(CN)2 (H2 dcphen)]⋅2 H2 O (1 P), exhibited vapochromic behavior in the presence of alcoholic vapors through transformation to a red, crystalline, porous, vapor-adsorbed form, 1 R⊃vapor. The obtained 1 R⊃vapor complex released the adsorbed vapors upon heating without col

There are two main subtypes of GH-producing pituitary adenoma: densely granulated (DG-type) and sparsely granulated (SG-type). Despite the difference in drug responsiveness between the two subtypes, their molecular mechanisms remain unknown. The aim of this study is to evaluate the differential expression of genes related to drug responsiveness between the two subtypes of somatotroph adenoma, and their relationship to the clinical characteristics. Eighty-two acromegaly patients (44 DG-type, 38 S

Abstract Dicyano(4,4′-dicarboxy-2,2′-bipyridine)platinum(II) forms pH-dependent polymorphs of various colors and displays outstanding vapochromism followed by luminescence changes upon exposure to certain organic vapors. The high sensitivity of the complex to vapor and pH is related to its three-dimensional network structure, which includes large cavities formed by hydrogen bonds and Pt···Pt interactions.

Hepatocellular carcinoma expressed increased MK at the messenger RNA and protein level.

A highly methanol-selective vapochromic response has been realized in a Ni^II -quinonoid complex, [Ni(HL^Me )₂ ] (H₂ L^Me =4-methylamino-6-methyliminio-3-oxocyclohexa-1,4-dien-1-olate) which exhibits a reversible structural transformation including a coordination geometrical change between the square-planar and octahedral structure by the selective uptake of methanol vapor. This was accompanied by a remarkable color change between purple and or