116075-75-3Relevant articles and documents
A zirconium metal-organic framework with an exceptionally high volumetric surface area
Stewart, Larissa,Lu, Weigang,Wei, Zhang-Wen,Ila, Daryush,Padilla, Carla,Zhou, Hong-Cai
, p. 14270 - 14276 (2017)
A zirconium metal-organic framework (MOF), PCN-111, has been synthesized by using an elongated ditopic carboxylate linker, 4,4′-(buta-1,3-diyne-1,4-diyl)dibenzoate. Single crystal X-ray diffraction characterization indicates that the noninterpenetrated mi
Light induced construction of porous covalent organic polymeric networks for significant enhancement of CO2 gas sorption
Bhowmik, Soumitra,Konda, Maruthi,Das, Apurba K.
, p. 47695 - 47703 (2017)
Herein, we report morphology-controlled porous polymeric materials for enhanced CO2 capture, which was achieved using the topochemical polymerization of dipeptide functionalized diphenylbutadiynes. The topochemical reaction was executed to control the morphology of the synthesized dipeptide appended diarylbutadiyne derivatives on a solid surface. Topochemical polymerization involves the formation of polydiacetylene due to the presence of hydrogen bonding between the amide groups and intermolecular π-π stacking interactions in their self-assembled state, which was established using UV-Vis, Raman and IR spectroscopy. The change in morphology of the two dipeptide functionalized diphenylbutadiyne (DPB) was confirmed by scanning electron microscopy. Porosity was developed after UV irradiation of the diacetylene-based dipeptide appended bolaamphiphiles. Interestingly, after UV irradiation, the porous covalent organic polymers 1 and 2 show 24.22 times and 12 times enhanced N2 gas adsorption than their parent compounds 1 and 2, respectively. The surface area of the porous covalent organic polymers 1 and 2 was enhanced 21.68 times and 5.54 times than their parent compounds 1 and 2, respectively. Polymer 1 exhibits 4.23 times the CO2 capture ability than compound 1 and polymer 2 shows 4.1 times the CO2 capture ability than compound 2. This study highlights the controlled synthesis of light induced porous covalent organic polymers with high surface area used for efficient CO2 storage applications.
Synthesis and investigation of phosphine ligands containing cationic guanidino functions in aqueous Heck reactions
Dibowski, Harald,Schmidtchen, Franz P.
, p. 2325 - 2330 (1995)
Phosphines 2 and 3 supplemented with strongly basic and hydrophilic guanidium functions were prepared for the first time. In combination with palladium acetate these ligands form active catalysts that promote an aqueous Heck reaction.
Expanding the group of Porous Interpenetrated Zr-Organic Frameworks (PIZOFs) with linkers of different lengths
Lippke, Jann,Brosent, Birte,Von Zons, Tobias,Virmani, Erika,Lilienthal, Sebastian,Preu?e, Thomas,Hulsmann, Miriam,Schneider, Andreas M.,Wuttke, Stefan,Behrens, Peter,Godt, Adelheid
, p. 748 - 761 (2017/01/25)
A Zr-based MOF of the PIZOF type, which consists of two independent and mutually interpenetrating UiO-type frameworks with [Zr6O4(OH)4(O2C)12] nodes, does not only form with a PEPEP dicarboxylic acid (P = phenylene, E = ethynylene). Also dicarboxylic acids with the shorter PPPP and PEPP spacers were found to give PIZOFs, denoted PPPP-PIZOF and PEPP-PIZOF, respectively. Reducing the spacer length even further to a PEEP segment caused a switchover to the formation of a UiO framework. The hysteresis in the Ar sorption curve of PEPP-PIZOF-1 and the slightly too large amount of combustion residue from PPPPPIZOF- 1 suggest structural defects. These hint at a mismatch between the requirement of the optimal linker length for PIZOF formation and the lengths of the PEPP and PPPP dicarboxylates. Nevertheless, these dicarboxylates prefer the formation of a PIZOF over the formation of a UiO structure. PEPEP-PIZOF-2, PPPP-PIZOF-1, and PEPP-PIZOF-1 are stable in air up to 325, 350, and 300 °C, respectively, and have BET surface areas of 2350, 2020, and 1650 m2 g-1, respectively. PEPEP-PIZOFs, even those with very hydrophilic oligo(ethylene glycol) side chains on the linkers, are very stable in water and also during drying from a water-wetted state. On the contrary, PEPP-PIZOF-1 and PPPP-PIZOF-1 that had been exposed to water required exchange of water for ethanol before drying to mostly preserve the framework. The results emphasize the importance of differentiating between framework damage caused through hydrolysis in water and through drying from a water-wetted state. The sensitivity of PEPP-PIZOF-1 and PPPP-PIZOF-1 against drying from a water-wetted state may be the consequence of defects. The drying stability of water-wetted PEPEP-PIZOFs lets us suggest that reversible bending of the linkers contributes to the stability of the PEPEP-PIZOFs.
