Wyniki wyszukiwania dla: 2-Ethylhexyl-4-methoxycinnamate

• Experimental and theoretical studies on the photodegradation of 2-ethylhexyl 4-methoxycinnamate in the presence of reactive oxygen and chlorine species

  Publikacja

  • A. Gackowska
  • M. Przybyłek
  • W. Studziński
  • J. Gaca

  - CENTRAL EUROPEAN JOURNAL OF CHEMISTRY - Rok 2014

  2-Ethylhexyl 4-methoxycinnamate (EHMC) is one of the most commonly used sunscreen ingredient. In this study we investigated photodegradation of EHMC in the presence of such common oxidizing and chlorinating systems as H2O2, H2O2/HCl, H2O2/UV, and H2O2/HCl/UV. Reaction products were detected by gas chromatography with a mass spectrometric detector (GC-MS). As a result of experimental studies chloro-substituted 4-methoxycinnamic...

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• Formation of chlorinated breakdown products during degradation of sunscreen agent, 2-ethylhexyl-4-methoxycinnamate in the presence of sodium hypochlorite

  Publikacja

  • A. Gackowska
  • M. Przybyłek
  • W. Studziński
  • J. Gaca

  - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH - Rok 2016

  In this study, a new degradation path of sunscreen active ingredient, 2-ethylhexyl-4-methoxycinnamate (EHMC) and 4-methoxycinnamic acid (MCA) in the presence of sodium hypochlorite (NaOCl), was discussed. The reaction products were detected using gas chromatography–mass spectrometry (GC-MS). Since HOCl treatment leads to more polar products than EHMC, application of polar extracting agents, dichloromethane and ethyl acetate/n-hexane...

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• Studies on the formation of formaldehyde during 2-ethylhexyl 4-(dimethylamino)benzoate demethylation in the presence of reactive oxygen and chlorine species

  Publikacja

  • W. Studziński
  • A. Gackowska
  • M. Przybyłek
  • J. Gaca

  - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH - Rok 2017

  In order to protect the skin from UV radiation, personal care products (PCPS) often contain chemical UV-filters. These compounds can enter the environment causing serious consequences on the water ecosystems. The aim of this study was to examine, the effect of different factors, such as UV light, the presence of NaOCl and H2O2 on the formaldehyde formation during popular UV filter, 2-ethylhexyl 4-(dimethylamino)benzoate (ODPABA)...

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• Enhanced Toxicity of Bisphenols Together with UV Filters in Water: Identification of Synergy and Antagonism in Three-Component Mixtures

  Publikacja

  • B. Kudłak
  • N. Jatkowska
  • W. Liu
  • M. Williams
  • D. Barcelo
  • H. B. Schiöth

  - MOLECULES - Rok 2022

  Contaminants of emerging concern (CEC) localize in the biome in variable combinations of complex mixtures that are often environmentally persistent, bioaccumulate and biomagnify, prompting a need for extensive monitoring. Many cosmetics include UV filters that are listed as CECs, such as benzophenone derivatives (oxybenzone, OXYB), cinnamates (2-ethylhexyl 4-methoxycinnamate, EMC) and camphor derivatives (4-methylbenzylidene-camphor,...

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• Application of gas chromatographic data and 2D molecular descriptors for accurate global mobility potential prediction

  Publikacja

  • W. Studziński
  • M. Przybyłek
  • A. Gackowska

  - ENVIRONMENTAL POLLUTION - Rok 2023

  Mobility is a key feature affecting the environmental fate, which is of particular importance in the case of persistent organic pollutants (POPs) and emerging pollutants (EPs). In this study, the global mobility classification artificial neural networks-based models employing GC retention times (RT) and 2D molecular descriptors were constructed and validated. The high usability of RT was confirmed based on the feature selection...

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• Synthesis, structure characterization and thermal propertiesof [Zr₆(μ₃-O)₄(μ₃-OH)₄(OOCCH₂^tBu)₉(μ₂-OH)₃]₂

  Publikacja

  • P. Piszczek
  • A. Bradtke
  • A. Wojtczak
  • T. Muzioł
  • J. Chojnacki

  - POLYHEDRON - Rok 2009

  Tytułowy związek otrzymano w reakcji Zr(OiPr)4 z nadmiarem kwasu 3,3-dimetylobutyrowego. Rentgenowska analiza strukturalna została wykonana w temperaturze 103 i 153K. Struktury zawierają dimery podjednostek o wzorze: [Zr6(μ3-O)4(μ3-OH)4-(OOCCH2tBu)9] połączonych 6 mostkującymi grupami μ2-OH. Analiza zmiennotemperaturowych...

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• The first manganese trialkoxysilanethiolates: formation, properties and structure of solvent ligated complexes - [Mn{SSi(OBut)3}2(MeCN)] and [Mn{SSi(OBut)3}2(MeOH)4]

  Publikacja

  • A. Mietlarek-Kropidłowska
  • J. Chojnacki
  • B. Becker

  - INORGANIC CHEMISTRY COMMUNICATIONS - Rok 2006

  W pracy przedstawiono otrzymywanie i strukturę pierwszych trialkoksysilanotiolanowych kompleksów manganu(II). Syntezy prowadzone były reakcji 2≡SiSH+ MnCl2 + 2Et3N = (≡SiS)2Mn + 2Et3N.HCl doprowadziły do otrzymania nowych kompleksów: [Mn{SSi(OBut)3}2(MeOH)4] (gdy jako rozpuszczalnik zastosowano MeOH) oraz [Mn{SSi(OBut)3}2(NCCH3)], gdy w badaniach posłużono się acetonitrylem.

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• Crystal structures of (E)-3-(4-hydroxybenzylidene)chroman-4-one and (E)-3-(3-hydroxybenzylidene)-2-phenylchroman-4-one

  Publikacja

  • K. Suchojad
  • A. Dołęga
  • A. Adamus-Grabicka
  • E. Budzisz
  • M. Małecka

  - Acta Crystallographica Section E CRYSTALLOGRAPHIC COMMUNICATIONS - Rok 2019

  The synthesis and crystal structures of (E)-3-(4-hydroxybenzylidene)chroman-4-one, C16H12O3,I, and (E)-3-(3-hydroxybenzylidene)-2-phenylchroman-4-one,C22H16O3,II, are reported. These compounds are of interest with respect to biological activity. Both structures display intermolecular C—H---O and O—H---O hydrogen bonding, forming layers in the crystal lattice. The crystal structure of compound I is consolidated...

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• A Novel [4+2] Cycloaddition Reaction Involving Lawesson’s Reagent. Structure and Specific Fragmentations of a New Cyclic 1,2-Thiaphosphinane-4-one

  Publikacja

  • W. Przychodzeń
  • B. Kusznierewicz

  - PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS - Rok 2023

  A crude morpholine enamine of acetone treated with Lawesson’s reagent unexpectedly yielded a six-membered thiaphosphinane-4-one. This compound is the first example of a new class of heterocycles. It has been proven that it is formed from 4-methyl-2-morpholino-1,3-pentadiene which is usually present in crude morpholine enamine batches. A mechanism of this regioselective reaction was postulated and a characteristic chair-like conformation...

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• Manifestation of Intermolecular Interactions in the IR Spectra of 2- and 4-Methylmethcathinones Hydrochlorides: DFT Study and Hirshfeld Surfaces Analysis

  Publikacja

  • J. Nycz

  - Biointerface Research in Applied Chemistry - Rok 2023

  This paper reports a Hirshfeld surfaces analysis of crystalline 2- and 4-methylmethcathinone (2-MMC and 4-MMC) hydrochlorides to analyze NH∙Cl and CH∙∙∙Cl intermolecular interactions and approve the formation of the NН2+–Cl– salt fragment in both 2-MMC∙HCl and 4-MMC∙HCl crystals. Two isomeric dimers were separated from the corresponding crystal packing to model IR spectra of the crystalline 2-MMC∙HCl...