Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates
[Fe(dppOH)2]2+ (dppOH = 2,6-di(pyrazol-1-yl)-4-(hydroxymethyl)pyridine) is known to show spin crossover (SCO) behavior and light-induced excited spin state transitions (LIESST). Here, we show that the SCO properties of the [Fe(dppOH)2]2+ complex can be altered by a crystal engineering approach emplo...
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| Format: | Article |
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MDPI
2017
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| Online Access: | https://eprints.nottingham.ac.uk/44459/ |
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| author | Kuramochi, Satoshi Shiga, Takuya Cameron, Jamie M. Newton, Graham N. Oshio, Hiroki |
| author_facet | Kuramochi, Satoshi Shiga, Takuya Cameron, Jamie M. Newton, Graham N. Oshio, Hiroki |
| author_sort | Kuramochi, Satoshi |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | [Fe(dppOH)2]2+ (dppOH = 2,6-di(pyrazol-1-yl)-4-(hydroxymethyl)pyridine) is known to show spin crossover (SCO) behavior and light-induced excited spin state transitions (LIESST). Here, we show that the SCO properties of the [Fe(dppOH)2]2+ complex can be altered by a crystal engineering approach employing counter anion exchange with polyoxometalate (POM) anions. Using this strategy, two new composite materials: (TBA)[Fe(dppOH)2][PMo12O40] (1) and [Fe(dppOH)2]3[PMo12O40]2 (2) (TBA = tetra-n-butylammonium) have been isolated and studied by single crystal X-ray diffraction and magnetic susceptibility measurements. 1 is found to be in a high spin state at 300 K and shows no spin crossover behavior due to a dense packing structure induced by hydrogen bonding between the hydroxyl group of the dppOH ligands and the POM anions. Conversely, 2 contains two crystallographically unique Fe centers, where one is in the low spin state whilst the other is locked in a high spin state in a manner analogous to 1. As a result, 2 is found to show partial spin crossover behavior around 230 K with a decrease in the χmT value of 1.9 emu·mol−1·K. This simple approach could therefore provide a useful method to aid in the design of next generation spin crossover materials. |
| first_indexed | 2025-11-14T19:55:39Z |
| format | Article |
| id | nottingham-44459 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:55:39Z |
| publishDate | 2017 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-444592020-05-04T18:56:36Z https://eprints.nottingham.ac.uk/44459/ Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates Kuramochi, Satoshi Shiga, Takuya Cameron, Jamie M. Newton, Graham N. Oshio, Hiroki [Fe(dppOH)2]2+ (dppOH = 2,6-di(pyrazol-1-yl)-4-(hydroxymethyl)pyridine) is known to show spin crossover (SCO) behavior and light-induced excited spin state transitions (LIESST). Here, we show that the SCO properties of the [Fe(dppOH)2]2+ complex can be altered by a crystal engineering approach employing counter anion exchange with polyoxometalate (POM) anions. Using this strategy, two new composite materials: (TBA)[Fe(dppOH)2][PMo12O40] (1) and [Fe(dppOH)2]3[PMo12O40]2 (2) (TBA = tetra-n-butylammonium) have been isolated and studied by single crystal X-ray diffraction and magnetic susceptibility measurements. 1 is found to be in a high spin state at 300 K and shows no spin crossover behavior due to a dense packing structure induced by hydrogen bonding between the hydroxyl group of the dppOH ligands and the POM anions. Conversely, 2 contains two crystallographically unique Fe centers, where one is in the low spin state whilst the other is locked in a high spin state in a manner analogous to 1. As a result, 2 is found to show partial spin crossover behavior around 230 K with a decrease in the χmT value of 1.9 emu·mol−1·K. This simple approach could therefore provide a useful method to aid in the design of next generation spin crossover materials. MDPI 2017-07-22 Article PeerReviewed Kuramochi, Satoshi, Shiga, Takuya, Cameron, Jamie M., Newton, Graham N. and Oshio, Hiroki (2017) Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates. Inorganics, 5 (3). 48/1-48/8. ISSN 2304-6740 Spin crossover; Polyoxometalate; Crystal engineering; Magnetic properties; Iron http://www.mdpi.com/2304-6740/5/3/48 doi:10.3390/inorganics5030048 doi:10.3390/inorganics5030048 |
| spellingShingle | Spin crossover; Polyoxometalate; Crystal engineering; Magnetic properties; Iron Kuramochi, Satoshi Shiga, Takuya Cameron, Jamie M. Newton, Graham N. Oshio, Hiroki Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates |
| title | Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates |
| title_full | Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates |
| title_fullStr | Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates |
| title_full_unstemmed | Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates |
| title_short | Synthesis, crystal structures and magnetic properties of composites incorporating an Fe(II) spin crossover complex and polyoxometalates |
| title_sort | synthesis, crystal structures and magnetic properties of composites incorporating an fe(ii) spin crossover complex and polyoxometalates |
| topic | Spin crossover; Polyoxometalate; Crystal engineering; Magnetic properties; Iron |
| url | https://eprints.nottingham.ac.uk/44459/ https://eprints.nottingham.ac.uk/44459/ https://eprints.nottingham.ac.uk/44459/ |