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CO 2 -Induced Spin-State Switching at Room Temperature in a Monomeric Cobalt(II) Complex with the Porous Nature.
- Source :
-
Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2020 Jun 22; Vol. 59 (26), pp. 10658-10665. Date of Electronic Publication: 2020 Apr 08. - Publication Year :
- 2020
-
Abstract
- CO <subscript>2</subscript> -responsive spin-state conversion between high-spin (HS) and low-spin (LS) states at room temperature was achieved in a monomeric cobalt(II) complex. A neutral cobalt(II) complex, [Co <superscript>II</superscript> (COO-terpy) <subscript>2</subscript> ]⋅4 H <subscript>2</subscript> O (1⋅4 H <subscript>2</subscript> O), stably formed cavities generated via π-π stacking motifs and hydrogen bond networks, resulting in the accommodation of four water molecules. Crystalline 1⋅4 H <subscript>2</subscript> O transformed to solvent-free 1 without loss of porosity by heating to 420 K. Compound 1 exhibited a selective CO <subscript>2</subscript> adsorption via a gate-open type of the structural modification. Furthermore, the HS/LS transition temperature (T <subscript>1/2</subscript> ) was able to be tuned by the CO <subscript>2</subscript> pressure over a wide temperature range. Unlike 1 exhibits the HS state at 290 K, the CO <subscript>2</subscript> -accomodated form 1⊃CO <subscript>2</subscript> (P CO 2 =110 kPa) was stabilized in the LS state at 290 K, probably caused by a chemical pressure effect by CO <subscript>2</subscript> accommodation, which provides reversible spin-state conversion by introducing/evacuating CO <subscript>2</subscript> gas into/from 1.<br /> (© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Details
- Language :
- English
- ISSN :
- 1521-3773
- Volume :
- 59
- Issue :
- 26
- Database :
- MEDLINE
- Journal :
- Angewandte Chemie (International ed. in English)
- Publication Type :
- Academic Journal
- Accession number :
- 32189464
- Full Text :
- https://doi.org/10.1002/anie.202003811