Issue 13, 2024

Modulation on terahertz absorption properties in LnIII–[AgI(CN)2] networks

Abstract

Molecular materials are playing a pivotal role in the advancement of prospective THz technologies. Herein, we have prepared nine isostructural coordination complexes of general formula [LnIII(H2O)3][AgI(CN)2]3 (LnAg, Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, and Dy). Vibrational spectroscopy has unveiled gradual changes in the ν(C[triple bond, length as m-dash]N) stretching frequencies within both infrared (IR) and Raman spectra from LaAg to DyAg, stemming from incremental alterations in crystallographic unit cell parameters and volumes. Similarly, the THz spectra manifest pronounced absorption signals between 1.0 to 1.2 THz, which can be judiciously tuned by varying lanthanide(III) ion and measurement temperature. Ab initio density-functional theory (DFT) calculations of THz spectra elucidate the primary contribution from opposite translational vibrations of Ag atoms and O atoms from H2O around Ln(III) atoms. Furthermore, thin films of LnAg can achieve a large return loss in a broad bandwidth in impedance-matching simulations.

Graphical abstract: Modulation on terahertz absorption properties in LnIII–[AgI(CN)2] networks

Supplementary files

Article information

Article type
Research Article
Submitted
29 Mar 2024
Accepted
18 May 2024
First published
20 May 2024
This article is Open Access
Creative Commons BY-NC license

Inorg. Chem. Front., 2024,11, 3906-3918

Modulation on terahertz absorption properties in LnIII–[AgI(CN)2] networks

G. Li, O. Stefanczyk, K. Kumar, Y. Mineo, L. Wang, K. Nakabayashi, M. Yoshikiyo, N. F. Chilton and S. Ohkoshi, Inorg. Chem. Front., 2024, 11, 3906 DOI: 10.1039/D4QI00800F

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