Solvent-controlled self-assembly of tetrapodal [4 + 4] phosphate organic molecular cage

Abstract

Two flexible subcomponents, namely tris(4-formylphenyl)phosphate and tris(2-aminoethyl)amine, are assembled into a tetrapodal [4 + 4] cage depending on the solvent effect. Single-crystal structure analysis reveals that the caivity is surrounded by four phosphate uints. Good selectivity of CO2 adsorption over CH4 is demonstrated by the gas adsorption experiment.

Energy-Efficient Biphasic Solvents for Industrial Carbon Capture: Role of Physical Solvents on CO2 Absorption and Phase Splitting

“…Overall, NHD could obviously decrease the energy barrier for the regeneration of carbamate by Reaction II (a) and (b) (Figure S15), which is caused by the solvent effect of NHD. 38,39 Generally, molecular H 2 O has higher polarity than that of NHD, resulting in more stable hydrogen bonds between H 2 O and DMPA. These hydrogen bonds might decrease the electron density around N (DMPA), leading to the reduction in the nucleophilicity or alkalinity of DMPA.…”

Recent advances in the applications of porous organic cages

“…Generally speaking, the larger the difference in size, the more easily separation can be achieved. Therefore, the separation of gas pairs with a relatively profound size difference, such as CO 2 / N 2 34,35 and CO 2 /CH 4 , 36,37 is straightforward using POCs.…”

“…Many studies have reported the ideal selectivity in gas pairs of CO 2 /N 2 or CO 2 /CH 4 achieved by POCs; the ideal selectivity value of the CO 2 /N 2 pair ranges from B10 to 200, 34,35,[38][39][40][41][42] at standard temperatures (273-298 K) and pressure (1 bar), whereas the reported selectivity of CO 2 /CH 4 ranges from B4 to B50. [36][37][38] The real challenge for separation is gas pairs with a small size difference. In Fig.…”

Recent Advances in Tris‐Primary Amine Based Organic Imine Cages and Related Amine Macrocycles

“…Huang et al recently reported profound solvent effect in the formation of OICs from trisformyl 6 and 1 . [ 12 ] When the reaction was carried out in MeCN with 1:1 molar ratio [2+3] imine cage 7 was obtained with characteristic peaks in ESI‐MS and 1 H NMR spectroscopy. But replacement of MeCN by CHCl 3 led to complete change of framework toward [4+4] imine cage 8 (Scheme 3).…”