Pyrazine is a common bridging ligand to construct complexes with multidimensional infinite system.Just recently,Guo et al.found that coordination effect increase electron deficiency of pyrazine,which can realize photoinduced electron transfer of pyrazine complexes in solid states when suitable donor ligands exist1.We first report three bridging complexes of formulas([MCl2(DMSO)2(pz)]n M = Mn,Fe,Co for 1-3)which can exhibit both photochroism and photomagnetism by a photoinduced electron transfer process(Fig.1).We select chlorine and DMSO as donors and pyrazine as accepters and have succeeded in constructing a donor-metal-accepter system in these complexes(Fig.2).After irradiation,electron transferred from donors to accepters and generated radicals,which result in dramatically change in UV-vis spectrum and magnetic behavior.This is also the first observation of enhancement of magnetic susceptibility in LLCT photomagnetic complexes after irradiation2,3.