Publications by authors named "Gregory J McManus"
Article Synopsis
- - The ionic conductivity of solid polymer electrolytes is influenced by interactions between lithium ions and the polymer, as well as lithium ions and anions.
- - Density functional calculations were conducted to explore molecular interactions in a specific polymer system (CH-(CH-CF)-CH-Li-(CFSO)N) for different configurations.
- - Changes in lithium coordination numbers and their effects on the vibrational spectrum were examined to gain insights into ionic association at the molecular level for specific polymer systems.
Catalyst-Enabled Linkage Reduction in Imine Covalent Organic Frameworks.
ACS Appl Mater Interfaces
May 2021
Article Synopsis
- Chemists are actively searching for new covalent organic framework (COF) linkages to enhance material properties and structures.
- A new strategy has been developed using HPO as a bifunctional catalyst to create amine-linked COFs from common amine and aldehyde linkers.
- The resulting amine-linked COFs are more effective than their imine counterparts in promoting Knoevenagel condensation due to their better basicity and stability.
Autocatalytic Synthesis of Bifluoride Ionic Liquids by SuFEx Click Chemistry.
Angew Chem Int Ed Engl
December 2018
Article Synopsis
- - Ionic liquids containing bifluoride anions are great for electrochemical devices due to their high conductivity, low viscosity, and wide electrochemical windows, but they've rarely been studied because of difficulties in synthesis.
- - The paper presents a new autocatalytic method to synthesize these ionic liquids without using hydrogen fluoride (HF) and without needing purification, resulting in complete yields.
- - The study examines the thermophysical and electrochemical properties of the synthesized ionic liquids, finding that those with various side chains can achieve very wide electrochemical windows of up to 6.0 V consistently across tests.
Article Synopsis
- NSC 333003 is identified as an inhibitor of the MDM2-p53 interaction through virtual screening methods.
- Its chemical properties suggest it has potential for developing stronger analogs with better drug-like characteristics.
- The compound was synthesized using an acid-catalyzed reaction involving benzothiazole hydrazine and pyridyl phenyl ketone in methanol.
Article Synopsis
- - Imidazolium salts with salicylaldoxime or salen ligands can easily create ionic metal complexes with copper and manganese.
- - These complexes are useful in processes like metal extraction, which involves separating metals from ores or solutions.
- - They also have potential applications in biphasic catalysis, a method where reactions occur in two different liquid phases to improve efficiency.
Article Synopsis
- - A new metal-organic network was created using copper and an amino-substituted organic compound (5-NH(2)-1,3-bdc), resulting in a unique structural arrangement.
- - This network features a combination of triangular, square, and tetrahedral molecular building blocks, showing innovative use of various coordinating functional groups.
- - The structure's unprecedented topology indicates potential for new applications in materials science and chemistry.
Article Synopsis
- Researchers have developed new coordination polymers featuring Zn(II)-4,4'-bipyridine frameworks that incorporate pyrene and aromatic solvent molecules, showcasing unique fluorescent properties.
- These compounds exhibit significant red-shifted emission spectra due to pyrene-bipy exciplex formations, with structural analysis revealing differences based on the type of solvent present.
- The architectural variations result in contrasting fluorescence characteristics, with 1-D ladder geometries displaying similar fluorescence maxima and lifetimes, while the 2-D square grid structure shows a distinct blue-shift and shorter lifetime.
Article Synopsis
- The report studies the photophysical properties of self-assembled copper hydroxylated nanoballs (OH-nanoballs) using various optical methods in methanol.
- Key findings show ligand absorbance at 305 nm and a Cu(2+)-to-ligand transition at 695 nm, while the emission spectrum peaks at approximately 360 nm, but is significantly quenched compared to the free ligand.
- The addition of bases like imidazole enhances the emission intensity, hinting at the dissociation of nanoball units, and fluorescence polarization indicates the OH-nanoball retains a spherical structure in solution, allowing for rapid energy transfer among ligands.
Article Synopsis
- A new type of Kagomé lattice has been created, showcasing the modular properties of metal-organic networks.
- This lattice is notable because it is the first instance of a metal-organic coordination polymer featuring the sextuplet phenyl embrace.
- The sextuplet phenyl embrace acts as a building block, highlighting innovative approaches in the design of complex materials.
Article Synopsis
- - The study reveals the crystal structures of two new coordination polymers with similar compositions.
- - Although they share the same circuit symbol and Schläfli notation, these polymers exhibit different structural arrangements (topologies).
- - One polymer features a unique 3D topology named USF-1, while the other has a structure resembling that of CdSO4.
Article Synopsis
- The study shows that adding hydroxypropyl-beta-cyclodextrin to o-phthalaldehyde-amino acid-thiol reactions significantly boosts the fluorescence of isoindole products, particularly for glycine and lysine.
- The maximum fluorescence enhancement was 2.67 times for glycine, resulting from a stable 1:1 complex formation between the isoindole and cyclodextrin.
- This addition also greatly increases the stability of isoindole derivatives, with lysine's lifetime improving from 42 to 222 minutes, indicating potential benefits for amino acid analysis techniques like HPLC and capillary electrophoresis.
Article Synopsis
- This study introduces the novel application of fluorescence spectroscopy to analyze the environments in cavities of open framework coordination polymers.
- The research focuses on understanding how the cavities behave and interact with light at a molecular level.
- This method could lead to new insights in material science, particularly in the development of advanced materials with specific functionalities.