Back to Search
Start Over
Transient Porosity in Densely Packed Crystalline Carbazole–(p-Diethynylphenylene)–Carbazole Rotors: CO2 and Acetone Sorption Properties
- Source :
- Journal of the American Chemical Society. 139:7549-7557
- Publication Year :
- 2017
- Publisher :
- American Chemical Society (ACS), 2017.
-
Abstract
- We report for the first time the high sorption properties of a molecular rotor with no permanent voids or channels in its crystal structure. Such crystalline phase originates from THF, DCM, or the irreversible desolvation of entrapped benzene molecules. From these, the benzene in its solvate form acts as rotation stopper, as supported by dynamic characterization using solid-state 2H NMR experiments. In the solvent-free form, the diffusion of small quantities of iodine vapors caused a significant change in the intramolecular rotation, increasing the known activation energy to rotation from 8.5 to 10.6 kcal mol–1. Notably, those results paved the way for the discovery of the high CO2 uptake (201.6 cm3 g–1 at 196 K, under 1 atm) and acetone (5 wt %), a sorption property that was attributed to both, the restriction of the molecular rotation at low temperatures and the flexibility of the molecular axle made of conjugated p-(ethynylphenylene), surrounded by carbazole.
- Subjects :
- Carbazole
Diffusion
Sorption
02 engineering and technology
General Chemistry
Activation energy
Crystal structure
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Biochemistry
Catalysis
0104 chemical sciences
chemistry.chemical_compound
Colloid and Surface Chemistry
chemistry
Intramolecular force
Phase (matter)
Physical chemistry
Organic chemistry
0210 nano-technology
Benzene
Subjects
Details
- ISSN :
- 15205126 and 00027863
- Volume :
- 139
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi...........9d773d35c30c8bc40d0b4cb59fc8ab66
- Full Text :
- https://doi.org/10.1021/jacs.7b02015