An N,N0 -diethylformamide solvent-induced conversion cascade within a metal–organic framework single crystal
Jing Chen a, Meng-Yao Chao a, Yan Liu a, Bo-Wei Xu a, Wen-Hua Zhang *a （张文华）and David J. Young b
a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
b College of Engineering, Information Technology & Environment, Charles Darwin University, Darwin, Northern Territory 0909, Australia
Chem. Commun., 2020, 56, 5877--5880
Crystals of a two-dimensional (2D) metal–organic framework (MOF) [Cd3(BTB)2(DEF)4]·2(DEF)0.5 (1; BTB = benzene-1,3,5-tribenzolate; DEF = N,N′-diethylformamide) immersed in a solution of trans-1,2-bis(4-pyridyl)ethylene (BPEE) yields an interpenetrated three-dimensional (3D) MOF of [Cd3(BTB)2(BPEE)(H2O)2]·(BPEE)·xSol (2). Crystals of MOF 2, in turn, undergo a cascade conversion when immersed in DEF, yielding [Cd3(BTB)2(BPEE)1.8(DEF)0.9(H2O)0.8]·xSol (3a) over 100 seconds and [Cd3(BTB)2(BPEE)2(DEF)2]·xSol (4) after one hour, before finally shuttling back to MOF 1 after six hours.