title: Reversible transformation between chiral and achiral Dy6Mo4 clusters through a symmetric operation.
abstract: Three polynuclear lanthanide clusters: (NH4)2[Dy6Mo4O12(rac-L(3-))4(OOCCH3)8]·4CH3OH·6H2O (I), (Et3NH)2[Dy6Mo4O12(rac-L(3-))4(OOCCH3)8]·18H2O (II), and (Me4N)2[Dy6Mo4O12(rac-L(3-))4(OOCCH3)8]·CH3OH·14H2O (III) (H3L = (E)-2-((2,3-dihydroxypropylimino)methyl)-phenol) were synthesized. Single-crystal analysis reveals that cluster I crystallized in the centrosymmetric space group (P42/n), while clusters II and II crystallized in the chiral space group (P3121 or P3221), and cluster I can be transformed into clusters II and III, when Et3NH(+) and Me4N(+), respectively, are used to replace NH4(+). Investigation on the solid-state vibrational circular dichroism (VCD) spectra shows that the clusters II and III are homochiral crystallization. Powder X-ray diffraction study demonstrates that the transformation between chiral and achiral clusters is reversible.
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. lslong@xmu.edu.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zheng
authors.forename: Yin-Yin
authors.initials: YY
authors.lastname: Pan
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Ren
authors.forename: La-Sheng
authors.initials: LS
authors.lastname: Long
authors.forename: Rong-Bin
authors.initials: RB
authors.lastname: Huang
authors.forename: Lan-Sun
authors.initials: LS
authors.lastname: Zheng
mesh_terms: D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D028581:Lanthanoid Series Elements; D009942:Organometallic Compounds