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.

Graphical abstractReported 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 full-size imageDownload as PowerPoint slide