Synthesis of Calix[4]arene-Based Porous Organic Cages and Their Gas Adsorption.
Chemistry
; 30(34): e202400947, 2024 Jun 17.
Article
in En
| MEDLINE
| ID: mdl-38622630
ABSTRACT
Two crystalline large-sized porous organic cages (POCs) based on conical calix[4]arene (C4A) were designed and synthesized. The four-jaw C4A unit tends to follow the face-directed self-assembly law with the planar triangular building blocks such as tris(4-aminophenyl)amine (TAPA) or 1,3,5-tris(4-aminophenyl)benzene (TAPB) to generate a predictable cage with a stoichiometry of [6+8]. The formation of the large cages is confirmed through their relative molecular mass measured using MALDI-TOF/TOF spectra. The protonated molecular ion peaks of C4A-TAPA and C4A-TAPB were observed at m/z 5109.0 (calculated for C336H240O24N32 m/z 5109.7) and m/z 5594.2 (calculated for C384H264O24N24 m/z 5598.4). C4A-POCs exhibit I-type N2 adsorption-desorption isotherms with the BET surface areas of 1444.9â
m2 â
g-1 and 1014.6â
m2 â
g-1. The CO2 uptakes at 273â
K are 62.1â
cm3 â
g-1 and 52.4â
cm3 â
g-1 at a pressure of 100 KPa. The saturated iodine vapor static uptakes at 348â
K are 3.9â
g â
g-1 and 3.5â
g â
g-1. The adsorption capacity of C4A-TAPA for SO2 reaches to 124.4â
cm3 â
g-1 at 298â
K and 1.3â
bar. Additionally, the adsorption capacities of C4A-TAPA for C2H2, C2H4, and C2H6 were evaluated.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Chemistry
Journal subject:
QUIMICA
Year:
2024
Document type:
Article
Affiliation country:
China