Long-term entrapment and temperature-controlled-release of SF₆ gas in metal–organic frameworks (MOFs)

• Hana Bunzen,
• Andreas Kalytta-Mewes,
• Leo van Wüllen and
• Dirk Volkmer

Beilstein J. Nanotechnol. 2019, 10, 1851–1859, doi:10.3762/bjnano.10.180

• temperature, vacuum and acid-induced framework decomposition was also investigated. The controlled gas release using elevated temperature has the additional benefit that the host MOF can be reused for further gas capture cycles. Keywords: benzobistriazole; gas storage; kinetic trapping; metal–organic

• include tuning the pore properties, such as polarity, or introducing open metal sides for a better interaction between the guest and host material [5][7][11]. Recently, we reported on an alternative approach which dealt with kinetic trapping of gas molecules in MOFs [12]. This approach is based on using

• cubic crystal system and contains two types of cavities with diameters of 3.88 and 11.94 Å, which are connected by narrow (only 2.52 Å) pore apertures. This made the MOF a promising candidate for kinetic trapping of gases. In our recent work we were able to show that it was possible to trap over 40 wt

Polymorphic self-assembly of pyrazine-based tectons at the solution–solid interface

• Achintya Jana,
• Puneet Mishra and
• Neeladri Das

Beilstein J. Nanotechnol. 2019, 10, 494–499, doi:10.3762/bjnano.10.50

• stabilization energies for the two polymorphs, or kinetic trapping effects. Results and Discussion 2,5-Bis(pyridin-4-ylethynyl)pyrazine (1) reported here were newly synthesized using 2,5-dibromopyrazine as the starting material. The molecule consists of two pyridyl groups covalently connected to a central

• observed polymorphs. Observation of two equally distributed polymorphs may be ascribed to their nearly equal stabilization energies, or kinetic trapping effects. These pyrazine-based molecules have shown immense potential as building blocks to several two- and three-dimensional supramolecular architectures

Synthesis of [Fe(L_eq)(L_ax)]_n coordination polymer nanoparticles using blockcopolymer micelles

• Christoph Göbel,
• Ottokar Klimm,
• Florian Puchtler,
• Sabine Rosenfeldt,
• Stephan Förster and
• Birgit Weber

Beilstein J. Nanotechnol. 2017, 8, 1318–1327, doi:10.3762/bjnano.8.133

• centres remains in the HS state. Upon heating, a 3 K wide hysteresis is observed in the region of the first step with T1/2↑ = 127 K and T1/2↓ = 130 K. In the temperature range between 75 and 100 K first a decrease and then an increase of the χMT product upon heating is observed. This is due to a kinetic

• trapping effect, often observed in this temperature region when the thermal spin transition temperature (T1/2) and the transition temperature for the thermally trapped exited spin state (TTIESST) are in close proximity [44][52][53][54]. In such a case the completeness of the spin crossover, in this case

Transformations of PTCDA structures on rutile TiO₂ induced by thermal annealing and intermolecular forces

• Szymon Godlewski,
• Jakub S. Prauzner-Bechcicki,
• Thilo Glatzel,
• Ernst Meyer and
• Marek Szymoński

Beilstein J. Nanotechnol. 2015, 6, 1498–1507, doi:10.3762/bjnano.6.155

• substrate maintained at an elevated temperature leads to the formation of similar structures. The likeness of these results indicates that the obtained structures are formed due to the equilibration of the system and not through kinetic trapping. At this point, it is worth comparing the behaviour of the