Saint Petersburg State Institute of Technology

About: Saint Petersburg State Institute of Technology is a education organization based out in Saint Petersburg, Russia. It is known for research contribution in the topics: Catalysis & Chemistry. The organization has 1439 authors who have published 1393 publications receiving 7549 citations. The organization is also known as: Saint Petersburg State Technical University & Imperator's Petersburg Institute of Technology.

Medicinal chemistry of tetrazoles

Abstract: Properties of responsible for biological activity tetrazoles are considered. Examples are given of active pharmaceutical ingredients of modern drugs containing the tetrazole ring in the molecular structure. New publications on the synthesis and investigations of biological activity of promising tetrazole-containing compounds are cited.

High thermal conductivity composites consisting of diamond filler with tungsten coating and copper (silver) matrix

Abstract: Tungsten coatings with thickness of 5–500 nm are applied onto plane-faced synthetic diamonds with particle sizes of about 430 and 180 μm. The composition and structure of the coatings are investigated using scanning electron microscopy, X-ray spectral analysis, X-ray diffraction, and atomic force microscopy. The composition of the coatings varies within the range W–W2C–WC. The average roughness, R a, of the coatings’ surfaces (20–100 nm) increases with the weight–average thickness of the coating. Composites with a thermal conductivity (TC) as high as 900 W m−1 K−1 are obtained by spontaneous infiltration, without the aid of pressure, using the coated diamond grains as a filler, and copper or silver as a binder. The optimal coating thickness for producing a composite with maximal TC is 100–250 nm. For this thickness the heat conductance of coatings as a filler/matrix interface is calculated as G = (2–10) × 107 W m−2 K−1. The effects of coating composition, thickness and roughness, as well as of impurities, on wettability during the metal impregnation process and on the TC of the composites are considered.

Developments in Tetrazole Chemistry (2009–16)

Abstract: This short review compiles the main results of the studies in tetrazole chemistry published in the period 2009–2016. Attention is directed to the structure, reactivity, synthetic problems, functionalization, and also to the application of derivatives of this class of polynitrogen heterocyclic compounds. New conditions are revealed of the tetrazole synthesis underpinned by the use of versatile catalytic systems, ionic liquids, superacids, microwave activation, microreactor techniques, etc. Main trends in the development of the tetrazole chemistry that are helping to focus the efforts of researchers on novel, important, and promising directions of study are considered.