Jul 6 – 10, 2015
Institute of Nuclear Physics PAN, Kraków
Europe/Warsaw timezone

Strategies towards cyanide-based multifunctional molecular materials

Jul 7, 2015, 10:40 AM
20m
Flora Conference Room (Crown Piast Hotel)

Flora Conference Room

Crown Piast Hotel

Speaker

Dr Dawid Pinkowicz (Faculty of Chemistry, Jagiellonian University, Kraków)

Description

One of the huge advantages of molecule-based magnets over the conventional magnetic solids is their “structural plasticity” – the ability to undergo structural and magnetic changes/transitions on slight modifications by using appropriate stimuli: temperature, pressure, guest molecules, electromagnetic radiation and so on. In case of cyanide-based magnetic solids the removal/uptake of guest molecules can lead to the reversible formation/cleavage of molecular CN-bridges and the concomitant changes in their magnetic behavior. Moreover, if spin-crossover-capable ions are involved, Light-Induced Excited Spin State Trapping and the related photomagnetic effects can be expected. Additionally, pressurizing the spin-crossover capable compound influences the spin transition. Following the above outlined strategies we have successfully engineered and characterized several coordination frameworks showing solvent/ligand-induced structural changes followed by significant switching of their magnetic ordering temperature Tc [1-3]. We have also managed to observe very interesting magnetic and photomagnetic properties of cyanide-based magnetic solids in response to pressure [4,5]. The most interesting one is the pressure-induced photomagnetic effect in {[FeII(pyrazole)4]2[NbIV(CN)8].4H2O}n recorded for the first time ever [5]. References [1] Pinkowicz, D.; Podgajny, R.; Bałanda, M.; Makarewicz, M.; Gaweł, B.; Łasocha, W.; Sieklucka, B. Inorg. Chem. 2008, 47, 9745-9747. [2] Pinkowicz, D.; Podgajny, R.; Nitek, W.; Rams, M.; Majcher, A. M.; Nuida, T.; Ohkoshi, S.; Sieklucka, B. Chem. Mater. 2011, 23, 21-31. [3] Pinkowicz, D.; Podgajny, R.; Gaweł, G.; Nitek, W.; Łasocha, W.; Oszajca, M.; Czapla, M.; Makarewicz, M.; Bałanda, M.; Sieklucka, B. Angew. Chem. Int. Ed. 2011, 50, 3973-3977. [4] Pinkowicz, D.; Kurpiewska K.; Lewiński, K.; Bałanda M.; Mihalik M.; Zentkova, M.; Sieklucka, B. CrystEngComm. 2012, 14, 5224-5229. [5] Pinkowicz, D.; Rams, M.; Mišek, M.; Kamenev, K. V.; Tomkowiak, H.; Katrusiak, A.; Sieklucka, B. submitted.

Primary author

Dr Dawid Pinkowicz (Faculty of Chemistry, Jagiellonian University, Kraków)

Co-author

Prof. Barbara Sieklucka (Faculty of Chemistry, Jagiellonian University, Kraków)

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