Thermo-induced structural transformation with synergistic optical and magnetic changes in ytterbium and erbium complexes

Dinuclear ytterbium and erbium based bifunction complexes Ln_(2) L_(2)(depma_(2))Cl_(2)(1-Ln,Ln=Yb and Er,H_(2) L=N~1,N~3-bis(salicylideneimino)diethylenetriamine,depma_(2)=dimerized 9-diethyl-phosphonomethylanthracene)are reported.They undergo thermo-induced consecutive phase transitions,first the dissociation of depma_(2) ligand forming LnL(depma)Cl(2-Ln)and then the release of chloroethane forming LnL(epma)(3-Ln,epma=9-ethylphosphonomethylanthrancene).The structural transformations are accompanied with synergetic switch of the luminescence in visible and NIR regions and also magnetic dynamics.