Differentiable Formation of Chiroptical Lanthanide Heterometallic LnnLn’4-n(L6) (n=0–4) Tetrahedra with C2-Symmetrical Bis(tridentate) Ligands
King-Him Yim, Dr. Chi-Tung Yeung, Dr. Melody Yee-Man Wong, Dr. Michael R. Probert, Prof. Ga-Lai Law
Chemistry A European Journal
Construction of lanthanide heterometallic complex is important for engineering multifunction molecular containers. However, it remains a challenge because of the similar ionic radii of lanthanides. Herein we attempt to prepare chiral lanthanide heterometallic tetrahedra. Upon crystallization with a mixture of [Eu2L3] and [Ln2L3] (Ln=Gd, Tb and Dy) helicates, a mixture of heterometallic EunLn’4-n(L6) (n=0–4) tetrahedra was prepared. Selective formation of heterometallic tetrahedron was observed as MS deconvolution results deviated from statistical results. The formation of heterometallic tetrahedron was found to be sensitive to ionic radii as well as the ratio of the two helicates used in the crystallization.
lanthanide, heterometallic complex, multifunction, crystallization