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Oct 28, 2020 · We find that at a fixed temperature and solution composition, the induction time (τ) sequence for pure guest hydrate nucleation is τ(C 2 H 6) < τ(C 3 H 8) < τ(CH 4) < τ(H 2 S). A relatively small number of guest molecules with a shorter induction time for pure guest hydrate nucleation can promote the formation of initial nuclei of a mixed ...
Oct 5, 2016 · The characteristics of host–guest systems, such as molecular recognition, complexation, encapsulation, guest composition, and dynamic exchange, are manifested by changes in the chemical shifts (Δω) in the NMR spectrum. However, in cases where NMR signals cannot be detected, due to low concentrations, poor solubility, or relatively fast exchange, an alternative is needed.
Jun 7, 2021 · Here, we introduce an unprecedented concept of multimodal host–guest-complexation of dopants to simultaneously modulate the surface and bulk composition of perovskite films through a synergistic ...
Sep 14, 2016 · The uninvited guests had caused so much inconvenience and problem to us. Whenever we go somewhere we should always inform the hosts of our program in advance so that adequate arrangements can be made and everyone can enjoy the stay. Essay No. 02. An Unwelcome Guest.
Jul 1, 2016 · Since our predicted x dependences of the lattice constants on guest composition x in Figure 1 are for all x values (0 < x < 24) and therefore are for the alkali atom guests inside both the large, 28 atom cages and the small, 20 atom cages, it is interesting to briefly consider how the size of the clathrate cage in comparison with the guest atom ...
Jul 20, 2007 · This study presents the influences of additional guest molecules such as C 2 H 6, C 3 H 8, and CO 2 on methane hydrates regarding their thermal behavior. For this purpose, the onset temperatures of decomposition as well as the enthalpies of dissociation were determined for synthesized multicomponent gas hydrates in the range of 173−290 K at atmospheric pressure using a Calvet heat-flow calorimeter.
Aug 12, 2021 · The composition of a self-assembly system has long been an essential factor that governs the resulting supramolecular structures. Nevertheless, due to the rigorous demands of structural compatibility in host–guest chemistry, the molar ratio of host–guest mixtures has not been applied as a significant factor in modulating the supramolecular structures of host–guest complexes. In this study, via using a novel unimolecular quaternary clip (Q-clip) as the host molecule and pyrene as the ...
