| Organic molecule cages belong to porous nanomaterials and have been widely used in gas storage,sensing,and catalysis.In this thesis,an imine molecule cage was designed and synthesized.After characterization by single-crystal X-ray,pore size,porosity and pore volume,the controllable gas adsorption abilities of this cage were further investigated.The research results are listed as follows:(1)p-bromobenzaldehyde and neopentyl glycol were used as starting materials.After aldol condensation reaction,addition reaction,hydrolysis reaction and so on,a dialdehyde was obtained.Then,this dialdehyde was self-assembled with tris(2-aminoethyl)amine to form an imine molecule cage,which was determined by nuclear magnetic resonance,mass spectrometry,infrared spectroscopy,and single-crystal X-ray.(2)To investigate the controllable properties of this porous molecule cage,trifluoroacetic acid and triethylamine were added,respectively.The results showed that:under acidic conditions,the cage transferred to mater:ials,and the UV adsorption at 269 nm and 239 nm ascribed to the 4,4-dialdehyde benzophenone and tris(2-aminoethyl)amine,while the maximum fluorescence emission intensity at 540 nm was supposed to the 4,4-dialdehyde benzophenone;under alkaline conditions,the cage was re-formed,and the UV adsorption shifted to 276 nm,while the maximum fluorescence emission was at 554 nm.Upon the experimental results obtained herein,it was concluded that the self-assembly reaction was a reversible process,indicative of the stimuli-responsive properties of this imine cage with the addition of acid/alkali.(3)The BET data of the porous molecule cage showed that the resulting cage had cavities and porosity,and at 298 K,0.1 MPa condition,it could adsorb CO2,CO,and O2 with the adsoription amount 6.49 cm/g,4.44 cm3/g and 2.68 cm3/g,respectively. |
