Pillar-layered Zn–triazolate–carboxylate frameworks tuned by the bend angles of ditopic ligands

• Pillar-layered 3D Zn–triazolate–carboxylate frameworks
• Diverse 3,4-connected topologies tuned by the bend angles of pillars
• High thermal stability and blue photoluminescence

In the utilization of three ditopic ligands with different bend angles as pillars, we reported herein three pillar-layered Zn–triazolate–carboxylate frameworks, namely, [Zn2(ATRZ)2(BDC)]n (1), [Zn2(ATRZ)2(TPDC)]n·2nDMF (2) and [Zn2(ATRZ)2(ADDC)]n (3) (ATRZ = 3-amino-1,2,4-triazole, H2BDC = 1,4-benzenedicarboxylic acid, H2TPDC = 2,5-thiophenedicarboxylic acid, and H2ADDC = 1,3-adamantanedicarboxylic acid). Single crystal structural analyses demonstrate that different geometries of ditopic carboxylate pillars not only result in Zn–ATRZ layers adopting various corrugated configurations, but also give rise to 3,4-connected self-interpenetrated net of 1 and non-interpenetrated nets of 2 and 3. All these compounds exhibit high thermal stability and blue photoluminescence.

Reported herein three 3D pillar-layered MOFs designed by appropriate selection of well-known Zn–triazolate motifs as 2D layers, and ditopic aromatic carboxylate ligands as pillars.Figure optionsDownload as PowerPoint slide