The diphenylsulfone-3,3′-disulfo-4,4′-dicarboxylic acid (H 4 -DPSDSDC) ligand and its coordination polymers,were synthesized. The Zn(H 2 O) 4 units in 1 are connected by DPSDSDC 4− ligands to generate a one-dimensional (1D) chain, which is bridged by K−O bonds associated with bridging water molecules and sulfonate groups to yield a two-dimensional (2D) layer. In 2, the 1D hydroxyl-bridging Cu(II) chains are connected by DPSDSDC 4− ligands to give a 2D layer. The 2D layers in 1 and 2 are further connected by interlayered hydrogen bonds to give three-dimensional (3D) frameworks. Compounds 1 and 2 have good conductivities of 1.57 × 10 −4 and 5.32 × 10 −5 S cm −1 , respectively. Continuous well-defined hydrogen bonding networks associated with water molecules, sulfonate groups, and carboxylate groups were observed in compounds 1 and 2. Such hydrogen bonding networks provide hydrophilic domains and effective transfer pathways for protons. Here, we present elegant examples of a precise determination of the pathways for proton transport.
Compounds exhibiting tunable fluorescence emission upon adjusting the temperature are considered smart materials. Herein a three-dimensional structure of {[Cd(TBAPy)(H 2 O) 2 ]·4(H 2 O)} n (1) constructed from Cd II and 1,3,6,8-tetrakis(4-carboxylphenyl)pyrene (TBAPy 4-) ligand was synthesized and characterized. Temperature-dependent fluorescence studies showed the emission intensities for com-
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