Formation of metal-assisted stable double helices in dimers of cyclic bis-tetrapyrroles that exhibit spring-like motion.
Bidipyrrin-bridged macrocycles, prepared from Ni(II)-bridged dipyrrin-based nanorings by intramolecular oxidative biaryl coupling reactions, yielded [2+4]-type Zn(II)-assisted stable twisted-ring dimers comprising two double helices. These [2+4]-type metal complexes can be optically resolved by chiral HPLC and exhibit tunable electronic and optical properties as a result of spring-like motions. The double helices behave as glue to connect two macrocycles and as the screws of hinges to form thermally responsive synchronized spring systems.
Hashimoto
Takashi
T
College of Pharmaceutical Sciences, Institute of Science and Engineering, Ritsumeikan University, Kusatsu 525-8577, Japan.
Nishimura
Takuma
T
Lim
Jong Min
JM
Kim
Dongho
D
Maeda
Hiromitsu
H
D056831:Coordination Complexes / Q000737:chemistry; D061565:Cycloaddition Reaction; D019281:Dimerization; D006571:Heterocyclic Compounds / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry; D045725:Tetrapyrroles / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
D056831:Coordination Complexes; D006571:Heterocyclic Compounds; D045725:Tetrapyrroles; D015032:Zinc