Homochiral 1D Helical Chain Based on an Achiral Cu(II) Complex

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• 作者：Chihiro Kachi-Terajima ; Megumi Ishii ; Toshiaki Saito ; Chikahide Kanadani ; Takunori Harada ; Reiko Kuroda
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：July 16, 2012
• 年：2012
• 卷：51
• 期：14
• 页码：7502-7507
• 全文大小：397K
• 年卷期：v.51,no.14(July 16, 2012)
• ISSN：1520-510X

文摘

Self-assembly of an achiral [Cu(L)] complex produced a homochiral helical chain [Cu(L)]₃路2H₂O (1) (L = 2-dimethylaminoethyl(oxamato)). Interestingly, complex 1 obtained in our laboratory exhibits only a left-handed helical chain without any chiral source. Single-crystal X-ray analysis revealed the absolute structure and homochirality of its helical chain structure in the space group of P3₂. Solid-state circular dichroism (CD) spectra confirmed the high enantio excess of the crystals obtained in different synthesis batches. Magnetic susceptibility measurements reveal a relatively strong intrachain antiferromagnetic interaction between Cu(II) centers via an oxamato bridge (J = 鈭?4.4 cm^鈥?).