Mohamed Infas

Khalifa University of Science and Technology · Chemistry

Two-photon fluorescence microscopy (2PFM) emerged as a powerful alternative to conventional one-photon microscopy. 2PFM typically uses two near-infrared (NIR) photons to excite fluorescent dyes, which minimizes light scattering in biological samples. Multiphoton absorption also suppresses background signal and autofluorescence from tissues and allo...

Two-dimensional materials have gained immense attention for technological applications owing to their characteristic properties. MXene is one of the fast-growing family of 2D materials that exhibits remarkable physiochemical properties that cater numerous applications in the field of energy and storage. This review comprises the significant advance...

Here we report the in situ formation of two novel Metal Organic Frameworks based on copper and cobalt using tetrazole-5-carboxylate ethyl ester as the ligand synthesized by hydrothermal route. Both MOFs show isostructural three-dimensional networks with kagomé tilling topology and show high chemical stability. Despite the iso-structural nature, bot...

Separation of paraffin isomers is of great importance in the refining industry because of their potential applications for energy efficiency, as reflected by their associated Research Octane Number (RON) values. Here, we report the synthesis of the first zeolite–like metal-organic framework (ZMOF) with ana topology that displays helicoidally/cylind...

The development of highly stable separation agents is recognized as a decisive step toward the successful deployment of energy-efficient and cost-effective separation processes. Here, we report the synthesis and construction of a metal-organic framework (MOF), kag-MOF-1, that has adequate structural and chemical features and affords a stable adsorb...

Here we report four post-synthetic modifications, including the first ever example of a high pressure-induced post-synthetic modification, of a porous copper-based metal-organic framework. Ligand exchange with a water ligand at the axial metal site occurs with methanol, acetonitrile, methylamine and ethylamine within a single-crystal and without th...

A novel porous organic polymer has been synthesized using the molecular building block approach to deliberately encompass aldehyde functionalities amenable to post functionalization. The resultant porous framework allows a facile, one-step quantitative and post-synthetic functionalization by amines, permitting enhanced CO2 sorption properties.

Nanoparticles of a copper-based layered coordination polymer, STAM-2, have been prepared via an ultrasound mediated transformation from a layered metal-organic framework, STAM-1. The structure of the material was then solved using pair distribution function analysis to identify the structural units present and the final structural model refined aga...

Solid-state (13)C magic-angle spinning (MAS) NMR spectroscopy is used to investigate the structure of the Cu(ii)-based metal-organic frameworks (MOFs), HKUST-1 and STAM-1, and the structural changes occurring within these MOFs upon activation (dehydration). NMR spectroscopy is an attractive technique for the investigation of these materials, owing...

The magnetic interaction between dinuclear copper (II) in a new copper carboxylate compound, STAM-1, has been investigated by means of EPR and SQUID measurements. The powder EPR spectra, measured at 9.80 and 34.5 GHz and at different temperatures, show the typical lines of the triplet state (S = 1), attributed to Cu2+–Cu2+ dimers, in addition of a...

Hydrogen sulfide is an extremely toxic gas that is also of great interest for biological applications when delivered in the correct amount and at the desired rate. Here we show that the highly porous metal-organic frameworks with the CPO-27 structure can bind the hydrogen sulfide relatively strongly, allowing the storage of the gas for at least sev...

Formed by linking metals or metal clusters through organic linkers, metal-organic frameworks are a class of solids with structural and chemical properties that mark them out as candidates for many emerging gas storage, separation, catalysis and biomedical applications. Important features of these materials include their high porosity and their flex...

The reaction between zinc(II) acetate and 3,5-di(4-pyridyl)-1H-pyrazole (HL(1)) is crucially dependent on the solvent, with products based on different architectures formed in DMF, methanol and water. When the reaction is undertaken in DMF, the product is [Zn(3)(OAc)(6)(HL(1))(4)] 1, in which Zn(OAc)(2) centres link Zn(2)(OAc)(4)(HL(1))(4) units in...