Electrochemical Sensor Based on Iron(II) Phthalocyanine and Gold Nanoparticles for Nitrite Detection in Meat Products.

Nitrites are widely used in the food industry, particularly for the preservation of meat products. Controlling the nitrate content in food is an important task to ensure people's health is not at risk; therefore, the search for, and research of, new materials that will modify the electrodes in the electrochemical sensors that detect and control the nitrate content in food products is an urgent task. In this paper, we describe the electrochemical behavior of a glass carbon electrode (GCE), modified with a Fe(II) tetra-tert-butyl phthalocyanine film (FePc(tBu)/GCE), and decorated with gold nanoparticles (Au/FePc(tBu)/GCE); this electrode was deposited using gas-phase methods.

Heterostructures Based on Cobalt Phthalocyanine Films Decorated with Gold Nanoparticles for the Detection of Low Concentrations of Ammonia and Nitric Oxide.

This work is aimed at the development of new heterostructures based on cobalt phthalocyanines (CoPc) and gold nanoparticles (AuNPs), and the evaluation of the prospects of their use to determine low concentrations of ammonia and nitric oxide. For this purpose, CoPc films were decorated with AuNPs by gas-phase methods (MOCVD and PVD) and drop-casting (DC), and their chemiresistive sensor response to low concentrations of NO (10-50 ppb) and NH (1-10 ppm) was investigated. A comparative analysis of the characteristics of heterostructures depending on the preparation methods was carried out.

The Theoretical and Experimental Investigation of the Fluorinated Palladium β-Diketonate Derivatives: Structure and Physicochemical Properties.

To search for new suitable Pd precursors for MOCVD/ALD processes, the extended series of fluorinated palladium complexes [Pd(CHCXCHCO(R))] with β-diketone [tfa-1,1,1-trifluoro-2,4-pentanedionato (); pfpa-5,5,6,6,6-pentafluoro-2,4-hexanedionato (); hfba-5,5,6,6,7,7,7-heptafluoro-2,4-heptanedionato ()] and β-iminoketone [i-tfa-1,1,1-trifluoro-2-imino-4-pentanonato (); i-pfpa-5,5,6,6,6-pentafluoro-2-imino-4-hexanonato (); i-hfba-5,5,6,6,7,7,7-heptafluoro-2-imino-4-heptanonato ()] ligands were synthesized with 70-80% yields and characterized by a set of experimental (SXRD, XRD, IR, NMR spectroscopy, TG) and theoretical (DFT, Hirshfeld surface analysis) methods. Solutions of Pd β-diketonates contained both and isomers, while only isomers were detected in the solutions of Pd β-iminoketonates. The molecules - and new polymorphs of complexes and were arranged preferentially in stacks, and the distance between molecules in the stack generally increased with elongation of the fluorine chain in ligands.