Journal ArticleDOI
Thermochromism and Structure of Piperazinium Tetrachlorocuprate(II) Complexes.
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TLDR
The tetrachlorocuprate(II) ion can crystallize in two different structures with the piperazinium dication (pipzH(2), which shows thermo/photochromism, changing from green to yellow upon heating or laser irradiation.Abstract:
The tetrachlorocuprate(II) ion can crystallize in two different structures with the piperazinium dication (pipzH(2)). Both structures contain discrete CuCl42- species. A yellow compound (pipzH(2))[CuCl4]. 2H(2)O (1) is monoclinic (C2/c, Z = 4, a = 10.538(3) Angstrom, b = 7.4312(5) Angstrom, c = 17.281(4) Angstrom, beta = 111.900(10)degrees) and contains the CuCl42- ion as a distorted tetrahedron. A green compound (pipzH(2))(2)[CuCl4]. Cl-2. 3H(2)O (2) is triclinic (P (1) over bar, Z = 2, a = 9.264(3) Angstrom, b = 10.447(2) Angstrom, c = 11.366(2) Angstrom, alpha = 68.38 degrees, beta = 82.86(2)degrees, gamma = 83.05(2)degrees) and contains the CuCl42- ion with a square planar geometry. This latter compound shows thermo/photochromism, changing from green to yellow upon heating or laser irradiation.read more
Citations
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Understanding the Behavior of Halogens as Hydrogen Bond Acceptors
TL;DR: In this article, the similarities and differences between the behavior of carbon-bound and terminal metal-bound halogens and halide ions as potential hydrogen bond acceptors have been extensively investigated through examination of many thousands of interactions present in crystal structures.
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Syntheses, crystal structures and electronic properties of a series of copper(II) complexes with 3,5-halogen-substituted Schiff base ligands and their solutions
Takashiro Akitsu,Yasuaki Einaga +1 more
TL;DR: In this paper, structural features, electronic properties, thermally-induced structural phase transitions and absorption spectra depending on the solvent for ten Cu(II) complexes with 3,5-halogen-substituted Schiff base ligands were systematically investigated.
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Raman spectroscopy of transition metal complexes: molecular vibrational frequencies, phase transitions, isomers, and electronic structure
TL;DR: Raman spectroscopy has been used for the characterization of inorganic compounds, such as metal-oxo and trans-dioxo complexes of metals with the d2 electron configuration as discussed by the authors.
Journal ArticleDOI
Synthesis and crystal structures of the flexible Schiff base complex bis(N-1,2-diphenylethyl-salicydenaminato-κ2N,O)copper(II) (methanol): A rare case of solvent-induced distortion
Takashiro Akitsu,Yasuaki Einaga +1 more
TL;DR: In this article, a new mononuclear copper(II) complex incorporating a bulky Schiff base ligand, bis(1,2-diphenylethyl-salicydenaminato-κ2N,O)copper(II), and its co-crystal containing methanol solvent molecules (brown form) have been synthesized and characterized by X-ray crystallography, XRD, IR and diffuse reflectance spectra in the solid state.
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Lead-free thermochromic perovskites with tunable transition temperatures for smart window applications
TL;DR: In this paper, a series of copper-based layered perovskites with organic cations having different alky chain lengths was investigated and the transition temperature was found to be dependent on the organic cation due to molecular motion and hydrogen bond interaction.
References
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銅(ii)錯体における熱変色性 ビス(n,n-ジエチルエチレンジアミン)銅(ii)ペルクロラートの赤および青〜紫型および紫の非熱変色性ビス(nエチルエチレンジアミン)銅(ii)ペルクロラートの構造
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