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Nanoscale Metal Coordination Macrocycles Fabricated by Using “Dimeric” Dipyrrins
Author(s) -
Maeda Hiromitsu,
Hashimoto Takashi
Publication year - 2007
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200700444
Subject(s) - covalent bond , chemistry , nanoscopic scale , coordination complex , metal , chirality (physics) , crystallography , yield (engineering) , stereochemistry , nanotechnology , materials science , organic chemistry , chiral symmetry breaking , physics , quantum mechanics , quark , nambu–jona lasinio model , metallurgy
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.