Two pairs of chiral Yb<sup>III</sup> enantiomers presenting distinct NIR luminescence and circularly polarized luminescence performances with giant differences in second-harmonic generation responses
作者:Xiaodi Du、Zhiqiang Zhang、Congli Gao、Fengcai Li、Xi-Li Li
DOI:10.1039/d3dt03324d
日期:——
(LR/LS) into Yb(btfa)3(H2O)2 and Yb(dbm)3(H2O), respectively, two pairs of chiral YbIII enantiomers, namely Yb(btfa)3LR/Yb(btfa)3LS (D-1/L-1) and [Yb(dbm)3LR]·[Yb(dbm)3(C2H5OH)]/[Yb(dbm)3LS]·[Yb(dbm)3(C2H5OH)] (D-2/L-2) were isolated, where btfa− = 3-benzoyl-1,1,1-trifluoroacetonate, dbm− = dibenzoylmethanate, and LR/LS = (−)/(+)-4,5-pinenepyridyl-2-pyrazine. D-1/L-1 possess mononuclear structures in which
通过将对映体纯的单二齿N-供体配体(L R /L S )分别引入Yb(btfa) 3 (H 2 O) 2和Yb(dbm) 3 (H 2 O)中,两对手性Yb III对映异构体,即 Yb(btfa) 3 L R /Yb(btfa) 3 L S ( D-1/L-1 ) 和 [Yb(dbm) 3 L R ]·[Yb(dbm) 3 (C 2 H 5 OH) )]/[Yb(dbm) 3 L S ]·[Yb(dbm) 3 (C 2 H 5 OH)] ( D-2/L-2 ) 被分离,其中 btfa − = 3-苯甲酰基-1,1 ,1-三氟丙酮酸酯,dbm − = 二苯甲酰甲烷酸酯, LR /L S = (−)/(+)-4,5-蒎烯吡啶基-2-吡嗪。 D-1/L-1具有单核结构,其中 Yb III离子为八配位,而D-2/L-2显示包含 Yb(dbm) 3 (L R /L S ) 和 Yb(dbm) 的共晶结构3