TheMn II -basedporousmetal-organicframework,[Mn 3 (btca) 2 -(HCOO)(μ 3 -OH)(H 2 O) 2 ]·2DMF (1) (H 2 btca = benzotriazole-5carboxylate acid), was prepared by the solvothermal reaction of Mn(CH 3 COO) 2 ·4H 2 O and H 2 btca, which was characterized by infrared spectroscopy, thermogravimetric analyses, and X-ray crystallographic