Complex Phase Behaviour and Structural Transformations of Metal‐Organic Frameworks with Mixed Rigid and Flexible Bridging Ligands

Abstract

Twon ew heteroleptic metal-organic framework materials show stronga dsorption of H 2 and ethanol.[Co 2 (L1)(bdc) 2 ], where L1 = N 1 ,N 4 -bis(4-pyridinylmethyl)-2,5dimethylbenzene-1,4-diamine and bdc is benzene-1,4-dicarboxylate, has at wofold interpenetrating pillared layer structure with pcu topology.Ith as as tepped, hysteretic EtOH adsorption that can be related to complicated phase and structural transformation behaviour that occurs on de-solvation and re-solvation, including major conformational changes to the geometry of the flexible L1 ligand. [Co 2 (L1)(bpdc) 2 ], where bpdc = biphenyl-4,4'-dicarboxylate, has au nique sixconnected self-catenating framework structure. Solvation changes occur withouts ignificant structuralc hange and a partially-hydrolysed material binds its own decomposition products as guests. Scheme1.Ligands used in the MOF synthesis [a] H.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.