The invention belongs to the technical field of
new materials, and discloses a preparation method and application of a stimuli-responsive flexible two-dimensional
zinc-based complex. The
structural unit of the complex is [Zn2 (OH) 2 (H2L1) 4], Zn is a
divalent zinc ion, H2L1 represents a ligand: 4, 4 '-(2, 2-di-p-methylphenyl
ethylene-1, 1-diyl) dibenzoic acid, and a ligand: 4, 4'-(2, 2-di-p-methylphenyl
ethylene-1, 1-diyl) dibenzoic acid; wherein the structure of the two-dimensional
zinc-based complex belongs to a
hexagonal crystal system and a P-3
space group, and the
cell parameters of the two-dimensional zinc-based complex are as follows: the
axial length is # imgabs 0 # # imgabs 1 #, the axial angle is alpha = beta = 90 degrees, gamma = 120 degrees, and the
cell volume is # imgabs 2 # Z = 6. Based on
tetraphenylethylene (TPE), a
material structure is constructed by modifying a functional methyl functional group on a
benzene ring serving as a rotor group. The H2L1 contains two active
benzene rings with methyl, and the
benzene rings can still perform internal molecular movement even after forming a complex, so that the H2L1 is not limited. Therefore, the two-dimensional zinc-based complex can show stimulus-responsive structure reversible conversion during gas
molecule adsorption, so that gas is specifically adsorbed. The two-dimensional zinc-based complex has the potential to be applied to the field of low-carbon
hydrocarbon gas separation.