TY - JOUR
T1 - L- and d-[Ln(HCO2)(SO4)(H2O)]n (Ln = La, Ce, Pr, Nd, and Eu)
T2 - Chiral enantiomerically 3D architectures constructed by double-[Ln-O]n-helices
AU - Ju, Weiwei
AU - Zhang, Deng
AU - Zhu, Dunru
AU - Xu, Yan
PY - 2012/12/17
Y1 - 2012/12/17
N2 - A total of 10 three-dimensional chiral coordination compounds l- and d-[Ln(HCO2)(SO4)(H2O)]n (Ln = La, Ce, Pr, Nd, and Eu) have been synthesized without any chiral auxiliary and characterized by IR, thermogravimetric, and elemental analyses. Their structures were determined by single-crystal X-ray structural analysis, which shows that l-[Ln(HCO2)(SO4)(H2O)]n (Ln = La, Ce, Pr, Nd, and Eu) crystallize in space group P43 and are laevogyrate and isostructural. The chiral frameworks of l-[Ln(HCO 2)(SO4)(H2O)]n are constructed from l-helical Ln-O cluster chains, while adjacent l-type helical -[Ln-O] n- chains are connected through O-Ln-O linkages to form chiral intertwined Ln-O double helices of left-handedness. d-[Ln(HCO 2)(SO4)(H2O)]n crystallize in space group P41, and their chiral frameworks consist of d-helical Ln-O cluster chains. The observed second-harmonic-generation efficiencies of [La(HCO2)(SO4)(H2O)]n, Ce(HCO 2)(SO4)(H2O)]n, [Pr(HCO 2)(SO4)(H2O)]n, [Nd(HCO 2)(SO4)(H2O)]n, and [Eu(HCO 2)(SO4)(H2O)]n are 0.7, 0.8, 0.7, 0.5, and 0.7 times that of urea, respectively. It is particularly interesting that [Pr(HCO2)(SO4)(H2O)]n shows good two-photon absorption.
AB - A total of 10 three-dimensional chiral coordination compounds l- and d-[Ln(HCO2)(SO4)(H2O)]n (Ln = La, Ce, Pr, Nd, and Eu) have been synthesized without any chiral auxiliary and characterized by IR, thermogravimetric, and elemental analyses. Their structures were determined by single-crystal X-ray structural analysis, which shows that l-[Ln(HCO2)(SO4)(H2O)]n (Ln = La, Ce, Pr, Nd, and Eu) crystallize in space group P43 and are laevogyrate and isostructural. The chiral frameworks of l-[Ln(HCO 2)(SO4)(H2O)]n are constructed from l-helical Ln-O cluster chains, while adjacent l-type helical -[Ln-O] n- chains are connected through O-Ln-O linkages to form chiral intertwined Ln-O double helices of left-handedness. d-[Ln(HCO 2)(SO4)(H2O)]n crystallize in space group P41, and their chiral frameworks consist of d-helical Ln-O cluster chains. The observed second-harmonic-generation efficiencies of [La(HCO2)(SO4)(H2O)]n, Ce(HCO 2)(SO4)(H2O)]n, [Pr(HCO 2)(SO4)(H2O)]n, [Nd(HCO 2)(SO4)(H2O)]n, and [Eu(HCO 2)(SO4)(H2O)]n are 0.7, 0.8, 0.7, 0.5, and 0.7 times that of urea, respectively. It is particularly interesting that [Pr(HCO2)(SO4)(H2O)]n shows good two-photon absorption.
UR - http://www.scopus.com/inward/record.url?scp=84871206826&partnerID=8YFLogxK
U2 - 10.1021/ic302134m
DO - 10.1021/ic302134m
M3 - 文章
AN - SCOPUS:84871206826
SN - 0020-1669
VL - 51
SP - 13373
EP - 13379
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 24
ER -