Metal-dependent photosensitivity of three isostructural 1D CPs based on 1,1′-bis(3-carboxylatobenzyl)-4,4′-bipyridinium moiety To study the effect of metal ions on the photochromic behaviors, three new isostructural coordination polymers (CPs) based on a neutral viologen moiety 1,1′-bis(3-carboxylatobenzyl)-4,4′-bipyridinium (bcbpy) have been obtained by choosing 1,2,4,5-benzenetetracarboxylic acid (H4BTEC) to coordinate with different metal ions, {[M(H2O)6][M(BTEC)(H2O)4]•(bcbpy)•4H2O}n (M...
