Metal-organic hybrid structures built with multi-directional polydentate ligands

A metal-organic hybrid structure formed by the coordinate bonding of a compound represented by the following Chemical Formula 1 or a salt thereof with metal ions:

• in the Chemical Formula 1,
• R's are each independently —R1, —NH—CO—R2, or —NH—R3,
• R1's are each independently —OH, a C6-60 aryl, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, or an amino acid residue,
• R2's are a C1-10 alkyl, a C6-60 aryl, or a C4-60 heteroaryl containing one of N, O, and S, and
• R3's are a C1-10 alkyl, or a C4-60 heteroaryl containing one of O and S.