Bacterial Cellulose-Based MOF Hybrid as a Sensitive Switch Off-On Luminescent Sensor for the Selective Recognition of l-Histidine.

In this study, a stable and luminescent UiO-66-NH () and its derivative Cu@ were prepared and utilized successfully as an Off-On luminescent sensing platform for effective, selective, as well as rapid (5 min) detection of l-Histidine (l-His). The reveals efficient quenching in the presence of Cu ions through photoinduced electron transition (PET) mechanism as a dynamic quenching process (in the range of 0.01-1 mM) forming Cu@ sensing platform.

0D to 3D Pr metal-organic networks crystal engineered for optimal iodine adsorption.

Four new praseodymium(III) metal-organic compounds varying in dimensionality from 0D to 3D have been designed and synthesized based on N-heterocyclic polycarboxylic acids, including pyridine-2,6-dicarboxylic acid (Hpydc) and pyrazine-2,3-dicarboxylic acid (Hpzdc). Altering the concentration of piperazine (pip, ancillary ligand) enables control over the dimensionality of the compound by switching between the 0D [Hpip][Hpip][Pr(pydc)]·4HO (I) and the 1D {[Pr(pydc)(Hpydc)(HO)]·4HO} (II) coordination polymer (CP). Upon replacing Hpydc with Hpzdc, CP II is converted to the 2D CP [Pr(pzdc)(Hpzdc)(HO)] (III) and using the metalloligand [Zn(Hpzdc)(HO)], the 3D heterometallic CP {[PrZn(pzdc)(HO)]·2HO} (IV) is formed.

Dopamine Sensing Based on Ultrathin Fluorescent Metal-Organic Nanosheets.

The importance of dopamine (DA) detection as a biomarker for several diseases, especially Parkinson''s disease, has persuaded scientists to develop new nanomaterials for efficient sensing of DA in clinical samples. Ultrathin metal-organic nanosheets due to their exceptional thickness, large surface area, and flexibility are endowed with many accessible active sites and optimal surface interaction with the target analyte molecules. In this regard, a novel layered fluorescent metal-organic nanomaterial with a honeycomb topology based on europium, [Eu(pzdc)(Hpzdc)(HO)] () (Hpzdc = 2,3-pyrazine dicarboxylic acid), was synthesized.

Ultrasound-assisted exfoliation of a layered 2D coordination polymer with HER electrocatalytic activity.

Large blue rectangular crystals of the 2D layered coordination polymer 1 have been obtained. The interest for this complex is two-fold. First, complex 1 is made of 2D layers packing along the (0-11) direction favored by the presence of lattice and coordinated water molecules.

Dual-emitting barium based metal-organic nanosheets as a potential sensor for temperature and anthrax biomarkers.

The development of novel 2D materials, due to the promising applications they have enabled through their unique properties, has attracted increasingly more research interest. In this regard, novel dual-emitting coordination polymer nanosheets were developed by doping Eu and Tb ions into the nanostructures of the [Ba(DPA)(HO)] (DPA = dipicolinic acid) coordination polymer (BCP). Single crystal x-ray crystallography revealed that BCP is a 1D coordination polymer and its three-dimensional supramolecular architecture is constructed with a relatively strong hydrogen bonding in the ac crystallographic plane and weak non-covalent interactions along the b axis.

Sonochemical synthesis of a new nano-sized barium coordination polymer and its application as a heterogeneous catalyst towards sono-synthesis of biodiesel.

A new nano-sized barium coordination polymer, {(bipyH)[Ba(pydc)(Hpydc)(HO)]}·nHO (1), (bipy = 4,4'-bipyridine and Hpydc = pyridine-2,6-dicarboxylic acid), has been sonochemically synthesized and fully characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), FT-IR spectroscopy, thermogravimetric analysis (TGA) and elemental analyses. Compound 1 was structurally characterized by single crystal X-ray diffraction and it was shown that this compound consists of 1D anionic coordination polymers and bipyH cationic species that construct a three-dimensional supramolecular architecture via non-covalent interactions i.e.