Light-Induced Excited Spin State Trapping in an Exchange-Coupled Nitroxide-Copper(II)-Nitroxide Cluster

摘要

The discovery of light-induced excited spin state trapping(LIESST)on a spin-crossover complex of iron(II)in 1984 attracted much attention in the field of photomagnetism and triggered a large,number of subsequent studies.Apart from being an interesting photophysical phenomenon,LIESST is one of the most promising effects for potential applications in molecular-level light-operated magnetic devices,because the metastable multiplet state excited by light may be trapped for hours to days at sufficiently low temperatures(typically below T_c approx=50 K).