Cooperative assembly of coexistent lanthanide–carboxylate chain and layer in a (4,6)-connected network

Abstract A novel 3D praseodymium metal–organic framework, [Pr 2 L 4 (H 2 O) 2 ] 2 n · n H 2 O, in which the 2D layers constructed by the interweaving right- and left-handed helical lanthanide–carboxylate chains are further pillared by 1D lanthanide–carboxylate chains, has been hydrothermally synthesized employing flexible 3-(4-(carboxymethoxy) phenyl) propanoic acid (H 2 L) as organic ligand. Its structure presents a new (4,6)-connected topology with a Schlafli symbol of {4 3 .6 3 }{4 4 .6 2 } 2 {4 7 .6 4 .8 4 }{4 8 .6 6 .8}. This complex exhibits intense characteristic emission bands of Pr 3 + ions in the solid state at room temperature.