Number of found documents: 7378
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Electrochemical Study of Selected Pyrene Derivatives as Precursors to Organic Semiconductors
Koláčná, Lucie; Tobrman, T.; Ludvík, Jiří
2018 - English
A series of 9 precursors for pyrene based biodegradable organic (semi)conductors having tetrasubstituted double bond as a central organic core and photo- or redox active centers attached at this core were electrochemically investigated in order to determine the influence of individual parts of the molecule on the redox properties, to describe the location of the reduction center and to understand the structure - redox activity relationship of the mentioned compounds. Keywords: pyrene; cyclobutene; polarography Available at various institutes of the ASCR
Electrochemical Study of Selected Pyrene Derivatives as Precursors to Organic Semiconductors

A series of 9 precursors for pyrene based biodegradable organic (semi)conductors having tetrasubstituted double bond as a central organic core and photo- or redox active centers attached at this core ...

Koláčná, Lucie; Tobrman, T.; Ludvík, Jiří
Ústav fyzikální chemie J. Heyrovského, 2018

Career in Polymers X, Book of Abstracts
Kobera, Libor
2018 - English
The book of abstracts contains the summaries of all the contributions to the Career in Polymers X. workshop organized by the Institute of Macromolecular Chemistry AS CR, in Prague, 22-23 June, 2018. This meeting was organized under the auspices of UNESCO/IUPAC course in Polymer Science, and supported by Strategy AV21 and Draslovka a.s. Keywords: polymer science; career in polymers; UNESCO course in Polymer Science Available at various institutes of the ASCR
Career in Polymers X, Book of Abstracts

The book of abstracts contains the summaries of all the contributions to the Career in Polymers X. workshop organized by the Institute of Macromolecular Chemistry AS CR, in Prague, 22-23 June, 2018. ...

Kobera, Libor
Ústav makromolekulární chemie, 2018

Synthesis and Functionalization of Aza[5]phenacenes.
Váňa, Lubomír
2018 - English
This work is aimed at the development of new efficient methodology towards the synthesis of various aza[5]phenacenes with δ-lactam rings in its structures.\n Keywords: organics electronics; synthesis; photoluminescent complexes Available in a digital repository NRGL
Synthesis and Functionalization of Aza[5]phenacenes.

This work is aimed at the development of new efficient methodology towards the synthesis of various aza[5]phenacenes with δ-lactam rings in its structures.\n

Váňa, Lubomír
Ústav chemických procesů, 2018

From Cationic Carbosilane Dendrimers and Glycodendrimers towards Multifunctional Dendritic Wedges.
Müllerová, Monika
2018 - English
Here we present the CDWs of the 1𝑠𝑡–2𝑛𝑑 generation with allyl groups at the periphery and a hydroxy/amine terminated linker. The suggested synthesis requires highly selective reactions with excellent yields. Moreover, due to an employment of strong nucleophiles or basic/acidic conditions during the synthesis, it is essential to select\nconvenient protecting groups, which will be briefly discussed.\n Keywords: carbosilane dendrimers; sythesis; multifunctional dendritic wedges Available in a digital repository NRGL
From Cationic Carbosilane Dendrimers and Glycodendrimers towards Multifunctional Dendritic Wedges.

Here we present the CDWs of the 1𝑠𝑡–2𝑛𝑑 generation with allyl groups at the periphery and a hydroxy/amine terminated linker. The suggested synthesis requires highly selective reactions with ...

Müllerová, Monika
Ústav chemických procesů, 2018

Magnesium Silicide and Germanide from Waste as a Source of CVD Precursors and Ultrapure Semiconductors.
Bumba, Jakub
2018 - English
From that reason the newly patented process, in which waste photovoltaic panels and optical lenses served as a raw materials, was tested to be the lucrative source of silicon or germanium for CVD precursors. Keywords: magnesium silicide; ultrapure semiconductors; synthesis Available in a digital repository NRGL
Magnesium Silicide and Germanide from Waste as a Source of CVD Precursors and Ultrapure Semiconductors.

From that reason the newly patented process, in which waste photovoltaic panels and optical lenses served as a raw materials, was tested to be the lucrative source of silicon or germanium for CVD ...

Bumba, Jakub
Ústav chemických procesů, 2018

Characterization of Equivalent Black carbon (EBC) at a Regional Background Site in Central Europe: Variability and Source Identification.
Mbengue, S.; Serfozo, N.; Holubová Šmejkalová, Adéla; Holoubek, I.
2018 - English
Black carbon (BC) is recognized to play an important role on adverse public health and in the Earth’s climate system (Bond et al., 2013). It is the most efficient light-absorbing aerosol species in the visible spectrum emitted as primary pollutant from a variety of combustion related sources. Although measurements of Equivalent Black Carbon (EBC) with multiple wavelength aethalometer have been used to provide insights regarding the influence of fossil fuel (traffic emissions) and wood smoke in ambient air (Sandradewi et al., 2008, Vaishya et al. 2017), scarce studies have been reported in Eastern Central Europe using real-time EBC measurements.\nThis study focuses on the seasonal, diurnal and weekly trends of EBC at a regional background site in Central Europe during a 5-year measurement. Our aim is to identify the potential sources of EBC, especially the influence from fossil fuel and biomass burning. Keywords: equivalent black carbon; 7-wavelength aethalometer; Ångström absorption exponent Available in a digital repository NRGL
Characterization of Equivalent Black carbon (EBC) at a Regional Background Site in Central Europe: Variability and Source Identification.

Black carbon (BC) is recognized to play an important role on adverse public health and in the Earth’s climate system (Bond et al., 2013). It is the most efficient light-absorbing aerosol species in ...

Mbengue, S.; Serfozo, N.; Holubová Šmejkalová, Adéla; Holoubek, I.
Ústav chemických procesů, 2018

The Distinctive Changes of Particles' Numeric Concentrations, Are Caused by Electrostatic Flue Gases Cleaning.
Molchanov, O.; Krpec, K.; Horák, J.; Hopan, F.; Ždímal, Vladimír; Schwarz, Jaroslav
2018 - English
A burning processes are always accompanied by emissions, and solid fuel combustion is believed to be the main source of dust releases. Solid fuels are predominant for using by boilers under 300 kW, which are mostly use for heating the domestic buildings and small premises in industrial and other use. It is well known, that using such boilers is inevitably involves the pollution releases, among which are emissions of oxides of carbon, nitrogen and sulfur oxides and particulate matters. After 2020 all boilers in European Union are have to be consistent with the list of ecological norms, and norm ECODESIGN is the one of them. This norm, inter alia, means that PM concentration could not exceed 40 mg/m3N. Such legislative measures are compelling the producers to make steps to decrease boiler´s pollutions. However, it is hard to achieve the desired results by optimization of burning processes only. That´s why arises a need to equip the boilers with the gas cleaning units. Within this context, precipitation particulate matter with electrostatic method is one of the most perspective. Within studies to optimize the constructional and high voltages parameters of ESP, it was appeared unusual phenomenon, which has describing below.\n Keywords: electrostatic precipitator; solid fuel combustion; nucleation Available in a digital repository NRGL
The Distinctive Changes of Particles' Numeric Concentrations, Are Caused by Electrostatic Flue Gases Cleaning.

A burning processes are always accompanied by emissions, and solid fuel combustion is believed to be the main source of dust releases. Solid fuels are predominant for using by boilers under 300 kW, ...

Molchanov, O.; Krpec, K.; Horák, J.; Hopan, F.; Ždímal, Vladimír; Schwarz, Jaroslav
Ústav chemických procesů, 2018

The Novel Preparation of Hydrotreating Catalysts Using Machanochemical Activation of Aluminum Nitrate and NiMo Complexes.
Kaluža, Luděk; Jirátová, Květa; Tyuliev, G.; Gulková, Daniela; Balabánová, Jana; Palcheva, R.; Koštejn, Martin; Spojakina, A.
2018 - English
The novel Al2O3 synthesis by mechanochemical activation of aluminum nitrate hydrate was applied to prepare hydrodesulfurization (HDS) NiMo catalysts. Impregnation techniques using the complex made by dissolution of nitrilotriacetic acid (NTA), ammonium heptamolybdate and nickel nitrate and the Anderson-type heteropolyoxymolybdate ((NH4)4Ni(OH)6Mo6O18) complex were compared with conventional impregnation using subsequent deposition of ammonium heptamolybdate (first) and nickel nitrate (second) with calcination in between. Properties of the support and HDS catalysts were studied by N2 physisorption, Raman spectroscopy, H2 temperature-programmed reduction (H2-TPR), O2 chemisorption and X-ray photoelectron spectroscopy (XPS). Keywords: hydrodesulfurization; NiMo catalyst; Al2O3 support Available in a digital repository NRGL
The Novel Preparation of Hydrotreating Catalysts Using Machanochemical Activation of Aluminum Nitrate and NiMo Complexes.

The novel Al2O3 synthesis by mechanochemical activation of aluminum nitrate hydrate was applied to prepare hydrodesulfurization (HDS) NiMo catalysts. Impregnation techniques using the complex made by ...

Kaluža, Luděk; Jirátová, Květa; Tyuliev, G.; Gulková, Daniela; Balabánová, Jana; Palcheva, R.; Koštejn, Martin; Spojakina, A.
Ústav chemických procesů, 2018

Materiálové a energetické využití suchého stabilizovaného čistírenského kalu.
Pohořelý, Michael; Moško, Jaroslav; Šyc, Michal; Václavková, Šárka; Skoblia, S.; Beňo, Z.; Svoboda, Karel
2018 - Czech
Příspěvek popisuje nutnost úpravy kalové koncovky či/a způsobu nakládání s čistírenskými kaly (ČK) v České republice. Hlavním důvodem pro úpravu je změna stávající legislativy ČR.\n The paper describes the need for change in the way of sewage sludge disposal in the Czech Republic. The main reason for the change is the amendment to the current Czech legislation. Keywords: sewage sludge; pyrolysis; fluidized bed combustion Available in a digital repository NRGL
Materiálové a energetické využití suchého stabilizovaného čistírenského kalu.

Příspěvek popisuje nutnost úpravy kalové koncovky či/a způsobu nakládání s čistírenskými kaly (ČK) v České republice. Hlavním důvodem pro úpravu je změna stávající legislativy ČR.\n...

Pohořelý, Michael; Moško, Jaroslav; Šyc, Michal; Václavková, Šárka; Skoblia, S.; Beňo, Z.; Svoboda, Karel
Ústav chemických procesů, 2018

Preparation and Physicochemical Properties of [6]Helicenes Fluorinated at Terminal Rings.
Církva, Vladimír; Jakubík, Pavel; Žádný, Jaroslav; Vacek, J.; Strašák, Tomáš; Hrbáč, J.; Císařová, I.; Storch, Jan
2018 - English
Two fluorinated helicenes, tetrafluoro[6]helicene and octafluoro[6]helicene were prepared photochemically and their physicochemical and optical properties were investigated. A separation of racemic tetrafluoro[6]helicene into individual enantiomers (P and M) was performed and the racemization barrier was determined. Crystal structures of major synthetic products including individual enantiomers of tetrafluoro[6]helicene were determined showing the replacement of π-π and CH-π interactions by CH-F interactions with increasing fluorine substitution. DFT calculation were performed to get an insight into the charge distribution and HOMO-LUMO gap. Keywords: helicene; fluorine; substitution Available in a digital repository NRGL
Preparation and Physicochemical Properties of [6]Helicenes Fluorinated at Terminal Rings.

Two fluorinated helicenes, tetrafluoro[6]helicene and octafluoro[6]helicene were prepared photochemically and their physicochemical and optical properties were investigated. A separation of racemic ...

Církva, Vladimír; Jakubík, Pavel; Žádný, Jaroslav; Vacek, J.; Strašák, Tomáš; Hrbáč, J.; Císařová, I.; Storch, Jan
Ústav chemických procesů, 2018

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