Undoubtably, it is challenging to simultaneously determine the identity, enantiomeric excess (ee), and total concentration of an enantiomer by just one optical measurement. Herein, we design a chiral tetrahedron Eu4(LR )4 with circularly polarized luminescence (CPL), which presents highly selective/stereoselective, rapid, and “turn-on” CPL response to chiral diamines, rather than the monoamino compounds, such as monoamines or amino alcohols. By recording the left- and right-CPL intensities of the Eu3+ ion at 591 nm, the enantiomeric composition and concentration of chiral diamines can be simultaneously determined by monitoring the g lum value and total emission intensity (I L + I R), respectively. Spectroscopy analyses demonstrate that the variations of g lum depend on the inversion and maintenance of configuration around the Eu3+ ion (Δ ↔ Λ), while the “turn-on” response arises from the raising of the T1 state of the ligand. The molecule/electron structural variations are proposed from the synergetic supramolecular interactions of NH2 groups with pendant diols and trifluoroacetyl groups.

To develop the strong near-infrared circularly polarized luminescent (NIR-CPL) emitters, a pair of ytterbium helicates, [Yb2(R-BTHP)4]2‒ and [Yb2(S-BTHP)4]2‒ based on the binaphthol modified bis-β-diketones are synthesized. X-ray crystallography analysis confirms...

Chiral supramolecular lanthanide-helicates are regarded as promising chiroptical materials due to their combination of ground and excited state chirality and special luminescence property from Ln3+, named as circularly polarized luminescence...

Chiral luminescent lanthanide supramolecular complexes have attracted much recent attention due to their excellent circularly polarized luminescence properties. Herein, a sandwich Eu(III) complex, (HNEt3)[EuL2] was prepared by the Eu3+ ion...

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