An Efficient Strategy for Self-Assembly of DNA-Mimic Homochiral 1D Helical Cu(II) Chain from Achiral Flexible Ligand by Spontaneous Resolution
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https://figshare.com/articles/dataset/An_Efficient_Strategy_for_Self_Assembly_of_DNA_Mimic_Homochiral_1D_Helical_Cu_II_Chain_from_Achiral_Flexible_Ligand_by_Spontaneous_Resolution/3120268
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资源简介：
Four
helical copper complexes Cu[N(CN)2]2(Hhmp)
(1), {Cu[N(CN)2]2(Hhmp)}∞ (2), (l-{Cu4[N(CN)2]2(hmp)4(CH3COO)2·CH3CN}∞ (3a), and d-{Cu4[N(CN)2]2(hmp)4(CH3COO)2·CH3CN}∞ (3b) (Hhmp = 2-(hydroxymethyl)pyridine) have been prepared
toward a mimic DNA structure. By changing the solvent
and supplementary ligand, the structures can be successfully tuned
from quasi-double-helical (complex 1) to racemic 1D single
helix (complex 2), then the right (3a)-/left
(3b)-handed double helices. The topologies of 3a and 3b may be considered as a mimic of DNA, where the
Cu–O bonds between the two strands replace the hydrogen-bonding
interactions in DNA. Solid-state circular dichroism spectra confirmed
that 3a and 3b are optically active, respectively. Magnetic measurements for 1–3 indicated all complexes to be antiferromagnetic
interactions. The best fitting results to the magnetic susceptibilities
were J = −0.80 cm–1, g = 2.11 for 1 and J1 = −9.22 cm–1, J2 = 3.56 cm–1, J3 =
−9.49 cm–1, g = 2.27 for 3.
创建时间：
2016-03-29
