Publications by authors named "Chenqi Ge"
Although China's low-permeability and tight oil reservoir utilization and newly proven reserves are growing annually, the overall recovery of such reservoirs is generally low. One of the main factors influencing the low recovery is the effect of intricate dynamic fracture propagations on the remaining oil distribution. Constrained by the evolution of an in situ stress field and the accumulation of fluid injection volumes, the growth of dynamic fractures allows a production profile of water breakthrough.
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- Two triangular prismatic cages were created by combining specific chemical compounds in acidic water, using an anionic guest to guide their formation.
- The exchange of counterions eliminated the template and the acid, making the cages stable and preventing reversibility.
- The cages can selectively recognize different guests in water and protect certain compounds, like an anthracene derivative, from harmful UV oxidation.
Self-Assembly of an Unlikely Occurring Quadrangular Tube by Modulating Intramolecular Forces.
Angew Chem Int Ed Engl
November 2024
Article Synopsis
- The study focuses on controlling the self-assembly process to produce specific molecular forms, particularly using trans-1,2-cyclohexanediamine, which tends to favor triangular structures due to its geometric properties.
- Researchers synthesized a unique tetraformyl precursor designed to form a quadrangular tube instead of the expected triangular structure when combined with trans-1,2-cyclohexanediamine, especially at higher precursor concentrations.
- The formation of this quadrangular product was influenced by specific intramolecular interactions within the structure, enhancing our understanding of how to achieve challenging molecular architectures through manipulation of these driving forces.
Self-Assembled Pure Covalent Tubes Exhibiting Circularly Polarized Luminescence.
Angew Chem Int Ed Engl
August 2024
Here, we successfully synthesized four structurally analogous, self-assembled chiral molecular tubes with relatively high yields. This achievement involved the condensation of six equivalents of enantiomerically pure trans-cyclohexane-1,2-diamine (trans-CHDA) and three equivalents of the corresponding tetraformyl precursor. Each precursor was equipped with a luminescent linker terminated by two m-phthalaldehyde units.
View Article and Find Full Text PDFA Self-Assembled Cage Binding Iodide Anions over Other Halide Ions in Water.
Angew Chem Int Ed Engl
September 2022
A triangular-prism shaped cage was self-assembled by the formation of a dynamic covalent bond, namely a hydrazone, in acidic aqueous solution. The hexacationic host bears a number of relatively acidic protons pointing inside the cage cavity, which is able to accommodate an iodide anion selectively in water over other halide anions such as F , Cl , and Br , which are more hydrated. As a comparison, a macrocycle analogue bearing fewer positive charges and fewer hydrogen bond donors shows no anion binding ability.
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- The study demonstrates the self-assembly of a trefoil knot in water without external templates, challenging previous beliefs about imine condensation in aqueous environments.
- The process involves condensing tetraformyl precursors with chiral diamines, resulting in a knot whose chirality is determined by the diamine's configuration.
- Results show that the presence of water is crucial for forming the trefoil knot, while a weaker macrocycle structure forms in organic solvents, highlighting the role of hydrophobic effects in the process.
Self-Assembly of a Purely Covalent Cage with Homochirality by Imine Formation in Water.
Angew Chem Int Ed Engl
August 2021
Self-assembly of host molecules in aqueous media via metal-ligand coordination is well developed. However, the preparation of purely covalent counterparts in water has remained a formidable task. An anionic tetrahedron cage was successfully self-assembled in a [4+4] manner by condensing a trisamine and a trisformyl in water.
View Article and Find Full Text PDFHerein, we report the self-assembly of an anionic homochiral octahedral cage by condensing six Ga cations and four trisacylhydrazone ligands. The robust nature of the hydrazone bond renders the cage stable in water, where it can take advantage of the hydrophobic effect for host-guest recognition. In addition to the internal binding site, namely, the inner cavity, the octahedral cage possesses four "windows", each of which represents an external binding site allowing peripheral complexation.
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