Organic compound, three-dimensional organic framework formed by using organic compound, separation sieve and optical layer, which comprise organic framework, and optical device comprising optical layer as optical amplification layer

A three-dimensional organic structure comprising a plurality of unit organic molecules which are self-assembled to form the three-dimensional organic structure,

• wherein each of the unit organic molecules has at least one aromatic ring, a first pair of substituents being connected to immediately adjacent positions of substitutable positions of the aromatic ring, and a second pair of substituents being connected to immediately adjacent positions of substitutable positions of the aromatic ring,
• wherein the substituents have terminal groups, independently, including a group selected from the group consisting of —CRcRdRe, —OH, —COOH, —CHO, —SH, —COCRcRdRe, —COOCRcRdRe, —CRc═CRdRe, —CN, —N═C═O, —C═N═N—CRcRdRe, —C≡CRa, —NHCRcRdRe, or —NH2,
• wherein the unit organic molecules contained in one layer of the three-dimensional structure are self-assembled by van der Waals interaction, London dispersion interaction or hydrogen bonding between the terminal groups of the first pair of the substituents included in one unit organic molecule and the terminal groups of the second pair of the substituent groups included in another unit organic molecule among the unit organic molecules, and
• wherein the unit organic molecules contained in one layer and the unit organic molecules contained in another adjacent layer of the three-dimensional structure are self-assembled by pi-pi interactions between the aromatic rings.