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Lada ZG, Andrikopoulos KS, Chrissanthopoulos A, Perlepes SP, Voyiatzis GA. A Known Iron(II) Complex in Different Nanosized Particles: Variable-Temperature Raman Study of Its Spin-Crossover Behavior. Inorg Chem 2019; 58:5183-5195. [PMID: 30916940 DOI: 10.1021/acs.inorgchem.9b00279] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The spin-crossover (SCO) polymorph B (complex 1) of the known compound [FeII{N(CN)2}2(abpt)2], where abpt is 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, has been prepared in three different particle sizes averaging ∼300 (sample 1a), ∼80 (sample 1b), and ∼20 nm (sample 1c). Two independent octahedral molecules possessing Fe1 and Fe2 were found to be present in the crystal of B. Magnetostructural relationships had established that at room temperature both FeII sites are in the high-spin state (HS-HS), whereas a decrease in the temperature to 90 K induces the complete high-spin to low-spin conversion of the Fe1 site, with Fe2 remaining in the high-spin state (LS-HS). The three samples have been characterized by elemental analyses, ATR spectra, solution UV/vis spectra (to exclude resonance Raman effects) and powder X-ray diffraction patterns, while their morphological characteristics have been examined by scanning electron microscopy (SEM). The SCO behavior of the originally prepared sample 1a has been monitored in detail by variable-temperature Raman studies in the 300-80 K range using mainly low-frequency ν(Fe-N) and δ(NFeN) modes and the ν(C≡N) mode of the axial dicyanamido groups as spin-sensitive vibrations. The new peaks that appear in the low-temperature Raman spectra of the LS-HS form of the complex are reproduced in the calculated spectrum of the LS state of [FeII{N(CN)2}2(abpt)2]. The influence of the average particle size on the SCO properties of 1 has also been studied by variable-temperature Raman spectra. The studies indicate that, during the HS-HS → LS-HS transition, the latter form of the complex appears at higher temperatures for the smaller particles; the T1/2 shift accomplished by manipulating the particle size within a range of roughly 1 order of magnitude (300-20 nm) may be as high as ∼30 K. The SCO features of 1, as deduced from the Raman study, are in excellent agreement with those derived from a traditional variable-temperature magnetic susceptibility study, indicating the utility of the former.
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Affiliation(s)
- Zoi G Lada
- Institute of Chemical Engineering Sciences (ICE-HT) , Foundation for Research and Technology-Hellas (FORTH) , Platani, P.O. Box 1414, 26504 Patras , Greece.,Department of Chemistry , University of Patras , 26504 Patras , Greece
| | - Konstantinos S Andrikopoulos
- Institute of Chemical Engineering Sciences (ICE-HT) , Foundation for Research and Technology-Hellas (FORTH) , Platani, P.O. Box 1414, 26504 Patras , Greece
| | - Athanassios Chrissanthopoulos
- Laboratory of Inorganic Chemistry, Department of Chemistry , National and Kapodistrian University of Athens , Panepistimiopolis, 15771 Zografou, Athens , Greece
| | - Spyros P Perlepes
- Department of Chemistry , University of Patras , 26504 Patras , Greece
| | - George A Voyiatzis
- Institute of Chemical Engineering Sciences (ICE-HT) , Foundation for Research and Technology-Hellas (FORTH) , Platani, P.O. Box 1414, 26504 Patras , Greece
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Miyazaki Y, Nakamoto T, Ikeuchi S, Saito K, Inaba A, Sorai M, Tojo T, Atake T, Matouzenko GS, Zein S, Borshch SA. Spin Crossover Phenomenon Accompanying Order−Disorder Phase Transition in the Ligand of [FeII(DAPP)(abpt)](ClO4)2 Compound (DAPP = Bis(3-aminopropyl)(2-pyridylmethyl)amine, abpt = 4-Amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) and Its Successive Self-Grinding Effect. J Phys Chem B 2007; 111:12508-17. [DOI: 10.1021/jp0730287] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuji Miyazaki
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Tadahiro Nakamoto
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Satoaki Ikeuchi
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Kazuya Saito
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Akira Inaba
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Michio Sorai
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Takeo Tojo
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Tooru Atake
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Galina S. Matouzenko
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Samir Zein
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
| | - Serguei A. Borshch
- Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan, Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan, and Laboratoire de Chimie (UMR CNRS and ENS-Lyon No. 5182), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France
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