Issue 45, 2020

Multifunctional Zn(ii)–Yb(iii) complex enantiomers showing second-harmonic generation, near-infrared luminescence, single-molecule magnet behaviour and proton conduction

Abstract

A new pair of multifunctional Zn(II)–Yb(III) complex enantiomers based on a chiral amine-phenol ligand, [YbZn2(SS/RR-L)2(H2O)4](ClO4)3·5H2O (S-1 and R-1) [H2L = (SS/RR)-cyclohexane-1,2-diylbis(azanediyl)-bis(methylene)-bis(2-methoxyphenol)], were synthesized and structurally characterized. In S-1 and R-1, the linear Zn(II)–Yb(III)–Zn(II) metal core is bridged by the phenolate oxygen atoms. Enantiomers S-1 and R-1 show chiroptical activity. Complex S-1 exhibits second-harmonic generation (SHG) and YbIII characteristic emissions in the near-infrared (NIR) region. Magnetic studies indicate that S-1 shows single-molecule magnet (SMM) behaviour. Moreover, S-1 displays a high proton conductivity of 1.55 × 10−4 S cm−1 at room temperature under 100% relative humidity (RH), which results from a 1D H-bonded chain constructed by NH groups of the chiral amine-phenol ligand, water molecules and perchlorate anions (ClO4). The combination of these five-functions, including chiral, nonlinear optical, magnetic, luminescent and proton-conductive properties, in molecule-based materials may provide great potential for application in smart multifunctional devices.

Graphical abstract: Multifunctional Zn(ii)–Yb(iii) complex enantiomers showing second-harmonic generation, near-infrared luminescence, single-molecule magnet behaviour and proton conduction

Supplementary files

Article information

Article type
Paper
Submitted
03 Aug 2020
Accepted
07 Oct 2020
First published
07 Oct 2020

J. Mater. Chem. C, 2020,8, 16032-16041

Multifunctional Zn(II)–Yb(III) complex enantiomers showing second-harmonic generation, near-infrared luminescence, single-molecule magnet behaviour and proton conduction

S. Zhu, J. Hu, L. Dong, H. Wen, S. Liu, Y. Lu and C. Liu, J. Mater. Chem. C, 2020, 8, 16032 DOI: 10.1039/D0TC03687K

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