Possible Interaction: Sulfur and Cupric Cation

“… Cu2+, … sulfur atoms on ultrathin two-dimensional (2D) nanosheets of spin-crossover (SCO) metal-organic frameworks (MOFs) {[Fe(1,3-bpp)2(NCS)2]2}n (…(4-pyridyl)propane), which constructed the ultrathin 2D nanosheets into three-dimensional (3D) nanoparticles, have made a profound effect on the SCO performance.”

“It is this redistribution, rather than a direct covalent interaction between Cu(II) and sulfur , that is the origin of the observed sulfur XAS preedge feature.”