| Abstract
| - Four new, non-interpenetrated square-grid coordination polymers, namely [Mn(L)2(NO3)2]∞ (1), {[Cd(L)2(NO3)2]·solvate}∞ (2), [Cd(L)2(NO3)2]∞ (3), and {[Zn(L)2](BF4)2·(C6H6)2.564·(DMF)1.576·(MeOH, H2O)3.454}∞ (4), were synthesizedusing the new, extremely long N,N‘-type ligand: 2,5-bis(4‘-(imidazol-1-yl)benzyl)-3,4-diaza-2,4-hexadiene (L). Thereaction of Cd(NO3)2 with L leads to two novel structures sharing the same framework composition, [Cd(L)2(NO3)2]∞,which have different arrangements of L around the metal centers. Both the channel-containing structure and thenonporous structure can be formed by choice of the appropriate solvent system. Moreover, the less stable, channel-containing form readily converts into the more stable, condensed structure upon removal of the guest moleculesfrom the channels.
- The synthesis of the new, extremely long N,N‘-type ligand 2,5-bis(4‘-(imidazol-1-yl)benzyl)-3,4-diaza-2,4-hexadiene (L) enabled the synthesis of four new non-interpenetrated square-grid coordination polymers. The stacking of the grids determines the existence of any channels in the structures. The channel and solvent-containing structure (left) converts to the condensed, solvent free structure (right) via a solid-to-solid structure transformation.
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