Interplay between Dopant Species and a Spin-Crossover Host Lattice during Light-Induced Excited-Spin-State Trapping Probed by Electron Paramagnetic Resonance Spectroscopy

Sergey V Tumanov; Sergey L Veber; Sam Greatorex; Malcolm A Halcrow; Matvey V Fedin

doi:10.1021/acs.inorgchem.8b01096

Interplay between Dopant Species and a Spin-Crossover Host Lattice during Light-Induced Excited-Spin-State Trapping Probed by Electron Paramagnetic Resonance Spectroscopy

Inorg Chem. 2018 Aug 6;57(15):8709-8713. doi: 10.1021/acs.inorgchem.8b01096. Epub 2018 Jul 11.

Authors

Sergey V Tumanov^{1

2}, Sergey L Veber^{1

2}, Sam Greatorex³, Malcolm A Halcrow³, Matvey V Fedin^{1

2}

Affiliations

¹ International Tomography Center of the Siberian Branch of the Russian Academy of Sciences , Institutskaya str. 3a , 630090 Novosibirsk , Russia.
² Novosibirsk State University , Pirogova str. 2 , 630090 Novosibirsk , Russia.
³ School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , U.K.

PMID: 29995390
DOI: 10.1021/acs.inorgchem.8b01096

Abstract

Q-band electron paramagnetic resonance (EPR) data conclusively demonstrate that the iron and cobalt centers in the solid solution [Fe(bpp)₂]_0.97[Co(terpy)₂]_0.03[BF₄]₂ (bpp = 2,6-dipyrazol-1-ylpyridine) undergo allosteric spin-state switching during light-induced excited-spin-state trapping (LIESST) at 20 K and thermal relaxation around 80 K. EPR of [Cu(terpy)₂]²⁺ and [Cu(bpp)₂]²⁺, doped into the same host lattice, also indicates expansion of the copper coordination sphere during LIESST excitation.