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1, 4, 5, 8‐naphthalene diimide (NDI)‐based MOFs, due to their tunable structures and properties, have shown promising applications in photochromism, photocatalysis, electrocatalysis, photothermal therapy, etc. Herein, using an L‐alanine modified NDI ligand, i.e. N, N′‐bis(L‐alanine)naphthalenediimide (AlaNDI), a novel Cd‐NDI Cd (AlaNDI)(H2O)]·DMF·H2O (complex 1) was constructed under solvothermal conditions, which has an obvious different structure with the previously reported ones. Structural analysis shows that the packing structure of complex 1 consists of two adjacent Cd atoms sharing two AlaNDI ligands, forming a dimetallic building block [Cd2O8]. Each building block connects a total of four AlaNDI ligands, where two Cd atoms are bridged by two ligands. The building blocks are interconnected by ligands to form a two‐dimensional layered structure. Based on the features of the NDI skeleton, it was found that complex 1 possesses multiple stimulus responses involving sensitivity to light: a reversible photochromism property and good photocatalytic degradation activity against various dyes, especially against cationic dyes crystal violet (CV), methyl violet (MV), and Janus green B (JGB). In addition, the stimulus‐response mechanism was investigated by control experiments. It is revealed that the photocatalytic active species may be related to h+ and •OH. [ABSTRACT FROM AUTHOR]

Fourteen Ni/Co-Ln heterometallic coordination polymers were successfully synthesized. All CPs are bridged into the 3D network structure by 2,3-pydc2- and ox2- and exhibit characteristic emission bands of the corresponding Ln(III) ion. [Display omitted] • A series of heterometallic NiII/CoII-LnIII coordination polymers have been synthesized by using pyridine-2,3-dicarboxylic acid as main ligand. • They exhibit characteristic luminescence of Ln(III) ions. • NIR emission bands of Ln(III) ions in some polymers present shift, split and broad under the double influence from the crystal field and Ni(II) or Co(II) ions. Fourteen isomorphic heterometallic coordination polymers (CPs) with general formulas of {[LnM(2,3-pydc) 2 (ox) 0.5 (H 2 O) 3 ]·3H 2 O} n (M = Ni, Ln = Pr 1 , Nd 2 , Sm 3 , Eu 4 , Gd 5 , Tb 6 , Dy 7 ; M = Co, Ln = Pr 8 , Nd 9 , Sm 10 , Eu 11 , Gd 12 , Tb 13 , Dy 14 ; 2,3-pydc2– = fully deprotonated pyridine-2,3-dicarboxylic acid, ox2– = fully deprotonated oxalic acid) have been synthesized by hydrothermal methods. All the CPs crystallize in triclinic P -1 space group and exhibit a 3D network formed by 2,3-pydc2– and ox2– bridging Ln(III) and Ni(II)/Co(II) ions. Meamwhile the room temperature photoluminescent properties have been explored. Except for CPs 5 and 12 , the other CPs exhibit characteristic luminescence of Ln(III) ions. [ABSTRACT FROM AUTHOR]