Enhanced luminescence stability with a Tb-spin crossover nanocomposite for spin state monitoring.

[Fe(Htrz)2(trz)]BF4@SiO2 nanorods were synthesized using a reverse emulsion technique and a Tb(3+) complex was chemically bound to the silica surface. This Tb-spin crossover nanocomposite demonstrates high luminescence stability under continuous thermal cycling. A reabsorption mechanism is determined to be responsible for the luminescence intensity variation during the spin state switching of the iron complex.