Wyniki wyszukiwania dla: TETRAZOLE AMIDES

• Selective detection of F- by chromogenic tetrazole receptor

  Publikacja

  • A. Pazik
  • A. Skwierawska

  - SUPRAMOLECULAR CHEMISTRY - Rok 2013

  A chromogenic anion host 4, containing two amide functionalities linked to azo dye and tetrazole rings was synthesized and its complexes with various anions were investigated. The results show that receptor 4 can recognize selectively biologically important F- ion. The binding affinity for F- was investigated by naked-eye colour change, UV-Vis and 1H NMR spectroscopy. Addition F- ion in CH3CN and DMSO to receptor 4 cause a colour...

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• Synthesis and Spectroscopic Properties of New Bis-tetrazoles

  Publikacja

  • A. Pazik
  • A. Skwierawska

  - Journal of Inclusion Phenomena and Macrocyclic Chemistry - Rok 2013

  Syntheses of N,N'-phenyltetrazole podands link with aliphatic chains containing oxygen, nitrogen and sulphur atoms, are described. The complexing properties of these compounds towards metal cations (Fe2+, Cu2+, Zn2+, Co2+, Ni2+) were investigated by absorption and infrared spectroscopy. The UV-Vis titrations were performed to estimate the stability constant values of the respective complexes with Cu2+ ion. Changes in UV-Vis absorption...

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• Synthesis and application of tetrazole di and triamide derivatives in ion-selective membrane electrodes

  Publikacja

  • A. Pazik
  • A. Skwierawska

  - SENSORS AND ACTUATORS B-CHEMICAL - Rok 2014

  A number of tetrazole diamides and triamides have been synthesized and applied as ion carries in ion-selective membrane electrodes. Their selectivity and sensitivity were studied towards alkali, alkaline earth, transition and heavy metal cations. it was found that membranes doped with 3 and 2-nitrophenyl octyl ether exhibit an almost theoretial Nernstian response for NH+ over relatively wide concentration range. Elestrodes with...

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• Synthesis of 5-Substituted 1H-Tetrazoles from Nitriles in the Presence of Heterogeneous Catalyst

  Publikacja

  • A. Pazik
  • B. Kamińska

  - Rok 2012

  Tetrazoles are five-membered heterocyclic compounds containing in their rings four nitrogen atoms. They have wide applications as corrosion inhibitors, analytical reagents, high-energy materials and gas generating compositions. Tetrazoles also play important role in coordination chemistry as ligands and in medicinal chemistry as metabolically stable surrogates for carboxylic acids. In recent years, investigation of new method of...

• Exploring the Reactivity of Unsymmetrical Diphosphanes toward Heterocumulenes: Access to Phosphanyl and Phosphoryl Derivatives of Amides, Imines, and Iminoamides

  Publikacja

  • N. Szynkiewicz
  • J. Chojnacki
  • R. Grubba

  - INORGANIC CHEMISTRY - Rok 2022

  We present a comprehensive study on the diphosphanation of iso(thio)cyanates by unsymmetrical diphosphanes. The reactions involving unsymmetrical diphosphanes and phenyl isocyanate or phenyl thioisocyanate gave rise to phosphanyl, phosphoryl, and thiophosphoryl derivatives of amides, imines, and iminoamides. The structures of the diphosphanation products were confirmed through NMR spectroscopy, IR spectroscopy, and single-crystal...

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• An approach to new chiral bicyclic imines and amines via Horner–Wadsworth–Emmons reaction

  Publikacja

  • J. Iwanejko
  • M. Sowiński
  • E. Wojaczyńska
  • T. Olszewski
  • M. Górecki

  - RSC Advances - Rok 2020

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• Direct conversion of secondary phosphine oxides and H-phosphinates with [di(acyloxy)iodo]benzenes to phosphinic and phosphonic amides

  Publikacja

  • S. Makowiec
  • A. Hubacz

  - HETEROATOM CHEMISTRY - Rok 2009

  W publikacji przedstawiono metodę pozwalająca na bezpośrednie otrzymywanie amidów kwasu fosfinowego i fosfonowego w reakcji drugorzędowych tlenków fosfin lub H-fosfinianów z [di(acyloksy)iodo]benzenami w obecności amin pierwszo lub drugorzędowych. Wykorzytując silne acylujące właściwości układu [di(acyloksy)iodo]benzen/R2P(O)H.

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• Chromogenic derivatives of new bis(phenylhydrazono-1H-tetrazol-5-yl-acetonitriles) - synthesis and properties

  Publikacja

  • A. Pazik
  • A. Skwierawska

  - SUPRAMOLECULAR CHEMISTRY - Rok 2012

  Derivatives of bis(phenylhydrazono-1H-tetrazol-5-yl-acetonitriles) with oxygen and sulphur atoms in the structure of aliphatic chains were successfully synthesised. The correlation between the ligand structure and its complexation properties was investigated by absorption spectroscopy. The formation of complexes of presented compounds with metal cations (Cu2+, Ni2+, Zn2+, Co2+, Fe2+ and Pb2+) was studied. Ligands 5-8 were additionally...

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• Synthesis of amides under microwave irradiation

  Publikacja

  • N. Łukasik
  • E. Wagner-Wysiecka
  • M. Bocheńska

  - Rok 2012

  Amides belong to the most important carboxylic acid derivatives. They are constituents of natural compounds like peptides and proteins. They found applications in many branches of science and industry, especially in pharmaceutical and polymer science. Conventional procedures for amide preparation involve reaction between amine and carboxylic acid or their more active derivatives such as acid chlorides, acid anhydrides or esters....

• Computer aided failure modes and effect analysis of safety related controlsystem

  Publikacja

  • A. Powarunas
  • M. Śliwiński

  - Rok 2003

  W artykule przedstawiamy problem związany z podniesieniem bezpieczeństwa funkcjonalnego elementów wykonawczych na przykładzie zaworu regulacyjnego. Jest to istotne z punktu widzenia pracy całego układu, ponieważ elementy wykonawcze decydują o wypełnieniu misji związanej z produkcją lub bezpieczeństwem. Stosowanie analizy FMECA na etapie projektowania umożliwia wyznaczenie krytycznych uszkodzeń z całego ich zbioru oraz określenie...