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π‐Stacking Enhanced Dynamic and Redox‐Switchable Self‐Assembly of Donor–Acceptor Metallo‐[2]Catenanes from Diimide Derivatives and Crown Ethers
Author(s) -
Koshkakaryan Gayane,
Parimal Kumar,
He Jiuming,
Zhang Xiyun,
Abliz Zeper,
Flood Amar H.,
Liu Yi
Publication year - 2008
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.200801590
Subject(s) - catenane , diimide , ligand (biochemistry) , stacking , acceptor , chemistry , self assembly , bipyridine , polymer chemistry , materials science , combinatorial chemistry , crystallography , organic chemistry , molecule , crystal structure , perylene , biochemistry , physics , receptor , condensed matter physics
In search of a better recipe : Bigger is better. On changing from strong donor–acceptor pairs to very weak ones, divalent 4,4′‐bipyridine was no longer a suitable filler ligand to give cyclized metal–ligand coordination [2]catenanes. The choice of 2,7‐diazapyrene, which has a larger π surface, proved to be essential in providing extra stabilization interactions to ensure efficient assembly (see figure).