Low‐Frequency Sub‐Terahertz Absorption in Hg II −XCN−Fe II (X=S, Se) Coordination Polymers
| Autor: | Guanping Li, Olaf Stefanczyk, Kunal Kumar, Yuuki Mineo, Koji Nakabayashi, Shin‐ichi Ohkoshi |
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| Rok vydání: | 2023 |
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| Zdroj: | Angewandte Chemie. 135 |
| ISSN: | 1521-3757 0044-8249 |
| DOI: | 10.1002/ange.202214673 |
| Popis: | Self-assembly FeII complexes of phenazine (Phen), quinoxaline (Qxn), and 4,4'-trimethylenedipyridine (Tmp) with tetrahedral building blocks of [HgII(XCN)4]2- (X = S or Se) formed six new high-dimensional frameworks with the general formula of [Fe(L) m ][Hg(XCN)4]·solvents (L = Phen, m/X = 2/S, 1; L = Qxn, m/X = 2/S, 2; L = Qxn, m/X = 1/S, 3; L = Qxn, m/X = 1/Se, 3-Se; L = Tmp, m/X = 1/S, 4; and L = Tmp, m/X = 1/Se, 4-Se). 1, 3, and 3-Se show an intense sub-terahertz (sub-THz) absorbance of around 0.60 THz due to vibrations of the solvent molecules coordinated to the FeII ions and crystallization organic molecules. In addition, crystals of 1, 4, and 4-Se display low-frequency Raman scattering with exceptionally low values of 0.44, 0.51, and 0.53 THz, respectively. These results indicate that heavy metal FeII-HgII systems are promising platforms to construct sub-THz absorbers. |
| Databáze: | OpenAIRE |
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