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Wednesday, May 20, 2020 | History

2 edition of photochemistry of stilbene model disperse dyes on polyamide and other substrates. found in the catalog.

photochemistry of stilbene model disperse dyes on polyamide and other substrates.

Neil Lindsay Boyd

photochemistry of stilbene model disperse dyes on polyamide and other substrates.

by Neil Lindsay Boyd

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Published .
Written in English


Edition Notes

Thesis (Ph. D.)--The Queen"s University of Belfast, 1973.

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL20226054M

Color model and color coordinates 3 Rylene dyes and pigments 5 Perylene derivatives 6 Higher rylene derivatives 14 Fluorescent labels 20 Toward ultrastable fluorescent rylene dyes for single-molecule spectroscopy 22 Comparison with other fluorescent molecules for. Humidity-resistance tests were carried out as follows: For each resin system, three films (based on the individual dispersants) were applied next to each other on one aluminum Q-panel (µm wire-bar) and tested after 7 days of drying (stoving enamels were cured for 20 min at °C), by exposure at 40 °C for hours in a humidity.

  1. The possibility of obtaining dyed cellulose acetate by the addition to an acetonic solution of cellulose acetate of acetone-soluble aldehyde dyes which form strong chemical bonds with it has been studied. 2. The optimum conditions for bulk-dyeing with aldehyde dyes have been worked out. 3. It has been shown that the reaction of an aldehyde dye with cellulose diacetate leads to partial Author: I. Ya. Kalontarov, K. Makhkamov, O. A. In, E. P. Fokin. Hydroxymethylbenzoic acid (HMBA) is a useful and versatile benzyl ester derived linker, completely resistant to acids (even to liquid HF) but easily cleavable by a variety of nucleophilic reagents to give access to peptides with diverse C-terminal functionalities. () Because the HMBA resin is TFA stable, on-resin side-chain deprotection can also be achieved.

  provides the latest news about 3D printing technology and 3D printers. We are now seven years old and have around million unique visitors per month. Resources. The carboxyl end groups (CEG) in polymers, such as polyethylene terephthalate (PET), are a measure of the number of unreacted carboxylic acid groups at each end of a polymer chain. The number of CEGs may influence the hydrolysis resistance of geosynthetics, such as geogrids and geotextiles. The lower the CEG value the higher is the hydrolysis resistance of geosynthetics, which in turn.


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Photochemistry of stilbene model disperse dyes on polyamide and other substrates by Neil Lindsay Boyd Download PDF EPUB FB2

Dyes and Pigments 8 () Fluorescence and Photoisomerization of Two Stilbene-Based Dyes K. Smit and K. Ghigginof Department of Physical Chemistry, University of Melbourne, Parkville, VictoriaAustralia (Received 25 February ; accepted 12 March ) SUMMARY The effect of solvent on the fluorescence and direct trans-cis photoisomeriz- ation of two stilbene-based Cited by: Spectrophotometric absorption measurements were used to study the photo-degradation of seven azo-dyes on cellulose diacetate and polyamide films.

The Cited by: 5. Other polymers with much higher concentrations of Cl trap are less reactive, and it is concluded that Tg is an important parameter in determining the efficiency of photochemical degradation.

Ruthenium metal complexes consisting of various functionalized carbene-pyridyl anchoring ligands were synthesized, characterized, and tested for their power conversion capabilities.

Carboxylate (DC), hydroxamate (DC), and acyl azide (DC) groups were explored as anchors to Cited by: 1. On continuing irradiation, other photoreactions take place in the time scale of hours: the stilbene moiety of compound 1 undergoes photocyclization to phenanthrene (quantum yield ), whereas in dendrimer 2 photocyclization to phenanthrene is accompanied by other processes, including a photoreaction involving the internal amine by: The performance of photochromic dyes, such as spirooxazines, chromenes, and diarylethenes, in polymers is important because the above applications require the dyes to be in a host : Andy Towns.

The invention relates, moreover, to a process for manufacturing printing inks from vehicles based on polyamide resins, solvents, dyes, pigments and optionally commonly used additives, the process being characterized in that polyamide resins are used as vehicles which are obtained by reacting (1) from to equivalent of dimerized fatty acids.

The Chemistry of Synthetic Dyes K Venkataraman (Eds.) Year: Publisher: disperse dyes molecular nylon developer acetate fixation nitro basf substituents Post a Review You can write a book review and share your experiences.

Other readers will always be interested in your opinion of the books. Diastereospecific photochemical dimerization of a stilbene-containing daisy chain monomer in solution as well as in the solid state Dafni G. Amirsakis, Arkadij M. Elizarov, Miguel A. Garcia-Garibay *, Peter T. Glink, J.

Fraser Stoddart, Andrew J P White, David J. WilliamsCited by: IMPORTANCE OF PAN FIBER. PAN-based fibers eventually supplanted most rayon-based fibers, and they still dominate the world market. In addition to high modulus fibers, researchers have also developed a low modulus fiber from PAN that had extremely high tensile strength.

Dyes and Pigments Yen MS, Chen CW () The Synthesis of Vinyltriethoxysilane-modified heteroaryl thiazole dyes and silica hybrid materials. Dyes and Pigments Maradiya H () Monoazo disperse dyes based on 2-amino-1,3,4-thiadiazole derivatives.J Serb Chem Soc Author: Ming-Shien Yen, Mu-Cheng Kuo, Chien-Wen Chen.

Procedure - Preparation of Diphenylacetylene from Stilbene Dibromide Place approximately 3 g of potassium hydroxide into a mL round-bottom flask and add 30 mL of ethylene glycol and a magnetic stir bar. Check to be sure the lab jack holding your hot plate is raised a few inches.

Stir the mixture in a heated sand bath until most of the potassiumFile Size: KB. A facile synthesis and detailed photophysical investigation of E/Z-isomerization of fluorescent diphenylamine tethered stilbene derivatives (DPASs) under white light exposure have been carried out to understand the effect on fluorescence, electrochemical properties, and photostability under various activation/deactivation pathways.

In solution state, in the dark, the E-isomer of DPASs (6a–d Cited by: 3. Learn more about these metrics Article Views are the COUNTER-compliant sum of full text article downloads since November (both PDF and HTML) across all institutions and individuals.

These metrics are regularly updated to reflect usage leading up to the last few days. The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. The Best Synthetic Methods Series is aimed at practising organic chemists who require up-to-date details of working methods for the synthesis of organic compounds.

This volume concentrates on the synthesis of compounds with specifictypes of structures which has not been possible by standard thermal methods. Solid-State NMR Characterization of C- and N-Labelled Phthalimides: Model Compounds for Studying Polyimides [William L. Jarrett] on *FREE* shipping on qualifying offers.

Polymer-dispersed perylene di-imide dye photodegradation is investigated by monitoring the fluorescence intensity as a function of nm laser pulses.

Anaerobically irradiated polymer-dye films exhibited an accelerated decrease in fluorescence intensity, which was partially recovered upon exposure to oxygen. Decelerated photodegradation rates were observed for perylene di-imide ethanol. other conditions in order to provide the necessary information in designing and operating supercritical fluid dyeing equipment.

Fig. Molecular structure of C. Disperse Red 60 dye. Fig. Molecular structures of the polymers employed in this study. Fig. High-performance polysiloxane-based photorefractive polymers with nonlinear optical azo, stilbene, and tolane chromophores S.

Schloter, U. Hofmann, P. Strohriegl, H.-W. Schmidt, and D. Haarer Physikalisches Institut and Bayreuther Institut fu ¨r Makromolekulforschung, Universitat Bayreuth, Bayreuth, Germany Received Ma   Their structures were elucidated by FT/IR and 13C-NMR spectroscopy.

The CIELAB () colour space was used in all the colour measurements for the six disazo stilbene dyes under the CIE recommended illuminants: D65 (natural day light), A (tungsten light), F2 (fluorescent light) and the standard 10° observer, by: 2. There is disclosed a process for the photochemical stabilization of dyed polyamide fibre materials, which comprises treating the dyed material with an aqueous foamed composition which contains at least a non-dyeing copper complex of bisazomethines, acylhydrazones, semicarbazones or thiosemicarbazones of aromatic aldehydes or ketones or by: The majority of industrial important azo dyes belong to the following groups: acid dyes, basic dyes, direct dyes, disperse dyes, mordant dyes, reactive dyes, and solvent dyes.

The number and position of sulfonate and other substituent groups on the azo dye particularly affect the rate of decolorization.the substrates is completely reversed, that is when electron-rich dienophiles react with electron-poor dienes.

[4+2] Cycloadditions of this type are called Diels-Alder reactions with inverse electron demand‘2' 1,3-Dienes that contain heteroatoms such as O and N in the diene backbone are the dienes of choice for this kind of cycloaddition.