1 Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
A magnetic MOF with two distinct functions was prepared and characterized: [2 + 2] photodimerization and anti-ferro-magnetism with a well-pronounced anion-tunable spin-flop transition below 2.5 K were both observed.