TY - JOUR
T1 - Folding of coordination polymers into double-stranded helical organization
AU - Kim, Ho Joong
AU - Lee, Eunji
AU - Kim, Min Gyu
AU - Kim, Min Cheol
AU - Lee, Myongsoo
AU - Sim, Eunji
PY - 2008/4/28
Y1 - 2008/4/28
N2 - Self-assembling coordination polymers based on PdII and Cu II metal ions were prepared from complexation of a bent-shaped bispyridine ligand and a corresponding transition metal. These coordination polymers were observed to self-assemble into supramolecular structures that differ significantly depending on the coordination geometry of the metal center. The polymer based on PdII self-assembles into a layer structure formed by bridging bispyri dine ligands connected in a trans-position of the square-planar coordination geometry of metal center. In contrast, the polymer based on CuII adopts a double-helical conformation with regular grooves, driven by interstranded, copper-chloride dimeric interaction. The double-stranded helical organization is further confirmed by structure optimization from density functional theory with aromatic framework, showing that the optimized double-helical structure is energetically favorable and consistent with the experimental results. These results demonstrate that weak metal-ligand bridging interactions can provide a useful strategy to construct stable double-stranded helical nanotubes.
AB - Self-assembling coordination polymers based on PdII and Cu II metal ions were prepared from complexation of a bent-shaped bispyridine ligand and a corresponding transition metal. These coordination polymers were observed to self-assemble into supramolecular structures that differ significantly depending on the coordination geometry of the metal center. The polymer based on PdII self-assembles into a layer structure formed by bridging bispyri dine ligands connected in a trans-position of the square-planar coordination geometry of metal center. In contrast, the polymer based on CuII adopts a double-helical conformation with regular grooves, driven by interstranded, copper-chloride dimeric interaction. The double-stranded helical organization is further confirmed by structure optimization from density functional theory with aromatic framework, showing that the optimized double-helical structure is energetically favorable and consistent with the experimental results. These results demonstrate that weak metal-ligand bridging interactions can provide a useful strategy to construct stable double-stranded helical nanotubes.
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U2 - 10.1002/chem.200800056
DO - 10.1002/chem.200800056
M3 - Article
C2 - 18393347
AN - SCOPUS:51549086978
VL - 14
SP - 3883
EP - 3888
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 13
ER -