Helicity controlled by the chirality of amino acid: two novel enantiopure chiral 3D architectures containing fivefold interwoven helicesElectronic supplementary information (ESI) available: Additional structural figures, and physical characterizations. CCDC reference numbers 851266 and 851267. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c2ce25038a
Two novel three-dimensional (3D) chiral coordination polymers, namely [Zn 4 (btc) 2 (Hbtc)( l -His) 2 (H 2 O) 4 ]·1.5H 2 O ( L-1 ) and [Zn 4 (btc) 2 (Hbtc)( d -His) 2 (H 2 O) 4 ]·1.5H 2 O ( D-1 ), have been assembled from zinc salt with mixed ligands 1,3,5-benzenetricarboxylic acid (H 3 btc) and chi...
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Main Authors | , , , , , , , |
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Format | Journal Article |
Language | English |
Published |
24.04.2012
|
Online Access | Get full text |
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Summary: | Two novel three-dimensional (3D) chiral coordination polymers, namely [Zn
4
(btc)
2
(Hbtc)(
l
-His)
2
(H
2
O)
4
]·1.5H
2
O (
L-1
) and [Zn
4
(btc)
2
(Hbtc)(
d
-His)
2
(H
2
O)
4
]·1.5H
2
O (
D-1
), have been assembled from zinc salt with mixed ligands 1,3,5-benzenetricarboxylic acid (H
3
btc) and chiral histidine (His). Their structures were determined by single-crystal X-ray diffraction analyses, elemental analyses, infrared (IR) spectra, X-ray powder diffraction, circular dichroism (CD) spectra, and thermogravimetric (TG) analysis. Compounds
L-1
and
D-1
are enantiomers and exhibit unique 3D chiral frameworks containing fivefold interwoven helices, which represent the first examples of chiral metal-amino acid complexes containing n-fold interwoven helices. Furthermore, the helices in
L-1
are left-handed, while those in
D-1
are right-handed, which indicate that the handedness of helices can be controlled by the chirality of His bound to the metal. More wonderfully, the 3D framework can be simplified to a (3,4)-connected chiral net with an unprecedented (4·9
2
)(4·9
4
·11) topology. Moreover, the luminescent properties of compound
L-1
are discussed.
Two novel 3D chiral complexes containing five-fold interwoven helices have been prepared by self-assemblies of chiral histidine and zinc salt in the presence of polycarboxylate ligand. |
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Bibliography: | For ESI and crystallographic data in CIF or other electronic format see DOI and 10.1039/c2ce25038a 851267 Electronic supplementary information (ESI) available: Additional structural figures, and physical characterizations. CCDC reference numbers 851266 |
ISSN: | 1466-8033 |
DOI: | 10.1039/c2ce25038a |