Nanoscale metal coordination macrocycles fabricated by using "dimeric" dipyrrins.
Covalently linked dipyrrin (dipyrromethene) dimers have afforded nanoscale [2+2]-type neutral coordination macrocycles with a diagonal of about 1.6 nm. Two moieties of the achiral dipyrrin-Zn(II) complex yield the chiral coordination macrocycles as minor species, as well as major meso stereoisomers by the covalent linkages. Tetrahedral Zn(II) coordination by using acyclic ligands enables the dipyrrin-metal complex units to readily rotate and pass through the cavity of the nanorings in order to reveal the transitions between the chiral and achiral isomers.
Maeda
Hiromitsu
H
Department of Bioscience and Biotechnology, Faculty of Science and Engineering, Ritsumeikan University, Kusatsu 525-8577, Japan. maedahir@se.ritsumei.ac.jp
Hashimoto
Takashi
T
D019281:Dimerization; D008024:Ligands; D053768:Metal Nanoparticles / Q000737:chemistry*; D011162:Porphobilinogen / Q000031:analogs & derivatives* / Q000737:chemistry; D013237:Stereoisomerism; D015032:Zinc / Q000737:chemistry*
D008024:Ligands; C507544:dipyrromethene; D011162:Porphobilinogen; D015032:Zinc