Katuzo Murata

A Solid-State Fluorescent Host System with a 21-Helical Column Consisting of Chiral (1R,2S)-2-Amino-1,2-diphenylethanol and Fluorescent 1-Pyrenecarboxylic Acid

A solid-state fluorescent host system was created by self-assembly of a 2(1)-helical columnar organic fluorophore composed of (1R,2S)-2-amino-1,2-diphenylethanol and fluorescent 1-pyrenecarboxylic acid. This host system has a characteristic 2(1)-helical columnar hydrogen- and ionic-bonded network. Channel-like cavities are formed by self-assembly of this column, and various guest molecules can be included by tuning the packing of this column. Moreover, the solid-state fluorescence of this host system can change according to the included guest molecules. This occurs because of the change in the relative arrangement of the pyrene rings as they adjust to the tuning of the packing of the shared 2(1)-helical column, according to the size of the included guest molecules. Therefore, this host system can recognize slight differences in molecular size and shape.

Multiple molecular response columnar host system composed of rac-2-amino-1,2-diphenylethanol and 1-fluorenecarboxylic acid

By using racemic (rac)-2-amino-1,2-diphenylethanol and achiral fluorescent 1-fluorenecarboxylic acid, a two-component columnar host system with multiple molecular response (guest-dependent spontaneous resolution and fluorescence) properties in the solid state was created.

Control of solid-state chiral optical properties of a chiral supramolecular organic fluorophore consisting of 1-pyrenesulfonic acid and chiral amine molecules

The solid-state chiral optical properties of a 1-pyrenesulfonic acid/amine supramolecular organic fluorophore could be controlled by changing the type of the aromatic ring and not the chirality of the chiral amine component molecule in the solid state.

2D layered supramolecular host system derived from a 21-helical column, composed of 1,2-diphenylethylenediamine and N-phenyliminodiacetic acid.

A supramolecular host system composed of a 2D layered structure was developed by combining 1,2-diphenylethylenediamine and N-phenyliminodiacetic acid. This 2D layered structure was formed by a hydrogen- and ionic-bonded network between 2(1)-helical columns.

Formation of supramolecular host system with multiple chiral points (central, axial, and helical) by using (1R,2S)-2-amino-1,2-diphenylethanol

A supramolecular host complex with multiple chiral points, which can include an alkyl alcohol, was successfully formed by combining (1R,2S)-2-amino-1,2-diphenylethanol and (S)-1,1′-binaphthyl-2,2′-diyl hydrogen phosphate.