2 edition of Synthesis and photochemistry of novel aromatic carbonyl photopolymerization initiators. found in the catalog.
Synthesis and photochemistry of novel aromatic carbonyl photopolymerization initiators.
Written in English
Thesis [Ph.D.] -CNAA at Manchester Polytechnic, Department of Chemistry, 1990.
|Contributions||Manchester Polytechnic. Department of Chemistry.|
A novel strategy for the preparation of extremely thick composites by photochemical and/or thermal free radical polymerization (FRP) and/or cationic polymerization (CP) under low-energy consumption visible light emitted diodes (LEDs) is described. The approach is based on the use of charge transfer complexes (CTCs) formed between N-aromatic amines (donors) and iodonium salts (Iod, acceptors Cited by: 9. Quantum yields of photoreduction are correlated with spectroscopically determined energy levels of lowest singlet and triplet states for a range of aromatic carbonyl compounds. The interpretation of reactivity in terms of electron density distribution in the excited .
0-R C-S-R 17 hv AR. C•+ R-S 18 19 / Q-rno 0 11 -o c-c - 21 20 0 frg-CH2S-O 23 Scheme 3 24 Chart 4 R-S-S-R 22 6 During , several studies were canied out by Forington et al, Otsu et al and Bevington et al•46 to reveal the mechanism of radical polymerization of unsaturated monomers with Size: 1MB. A monolayer of covalently anchored, novel, binaphthyl ketone is used as a surface‐confined photochemical radical generator for anchoring a variety of polymers to silicon surfaces. The precursor surface‐confined photochemical radical generator is synthesized by the application of a facile and novel method for the oxidation of sterically.
were attributed to the carbonyl stretching band of acid units. The carbonyl stretching band of ketone group ap-peared at 1,–1,cm−1. Bands at about 1, and 1, cm−1 were related to the C=C stretching aromatic units. The C–O stretching ether bands were observed at 1,–1, cm−: Samal Babanzadeh, Shahram Mehdipour‐Ataei. Introduction. Photopolymerization is basically described as a chemical reaction whereby organic materials exposed to electromagnetic reaction combine to form high‐molecular‐weight polymer molecules 1, ically, photopolymerization was first used over years ago during the time of ancient Egypt in the mummification process the last decades, there was a rapid increase in Cited by:
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Photoche,n. Photobiol Ozem., 62 () Synthesis, photopolymerization arid photochemistry of novel polysiloxane photoinitiators N. Allent and S. Hardy Chemistry Depaninent, Faculty of Science and Engineering, Manchester Polytechnic, Chester Street, Manchester Ml 5GD (UK) A.
Jacobine and D. Glaser Loctire Corporation, North Mountain Road, Cited by: 6. Synthesis, photopolymerization and photochemistry of novel polysiloxane photoinitiators. maxima are generally higher than those of the model initiator while the phosphorescence spectra exhibit typical nπ* carbonyl symmetry similar to that of the model but with longer phosphorescence lifetimes in the millisecond region.
Photopolymerization Cited by: 6. Synthesis and photochemistry of novel aromatic carbonyl photopolymerization initiators. Author: Lam, Edward. Awarding Body: Manchester Polytechnic Current Institution: Manchester Metropolitan University Date of Award: Availability of Full Text. The photochemistry and photopolymerization activity of a novel initiator, 3,4-dimethyl(3-N,N-dimethyl)-n-propoxythioxanthone, has been compared with that of the non-aminated molecule, 3,4-dimethyln-propoxythioxanthone.
Using photodilatometry, the rate of photopolymerization of n-butyl methacrylate is significantly greater for the aminated Cited by: 8. Synthesis of novel monomeric (2) and polymeric (2) RHMA based PIs with side-chain BP.
• Photopolymerization efficiency of the initiators was determined using photo-DSC. • Polymeric photoinitiators showed higher efficiency than the monomeric ones and BP. • This effect observed to be much more important than that of monomer by: His research interests focused both on the excited-state processes in photoinitiatiors and photosensitizers and their application to photopolymerization reactions in various areas.
He has published a total of around research articles, book chapters, review papers, technical papers, proceedings, and patents, as well as authoring one book. Photochemistry and photopolymerization activity of novel perester derivatives of fluorenone: a conventional and laser flash photolysis study.
Journal of Photochemistry and Photobiology A: Chemistry50 (3), DOI: /(90)Cited by: Abstract. Green chemistry has become a central issue in present-day chemistry. Photochemical reactions appear to have a great potential because in-depth chemical transformations are obtained in the absence of chemical activators, and thus no waste is : Angelo Albini.
Photochemistry-chemical reactions initiated by light-energy is absorbed or emitted by matter in discrete quanta called photons-absorption of light leads to an electronic excitation (ground state→excited state)-promote an e-like n→π∗ or π→π∗-most chemistry takes place from S1 and T1 excited states E = hν = hc/ λ.
Chap. 12 Photochemistry 2nd singlet excited state 1st singlet excited state Ground state 3rd triplet excited state 2nd triplet excited state 1st triplet excited state 1. Light absorption: S0 →S1, S0→S2 k~ 2. Vibrational Relaxation: k~/s, from high νto low ν 3.
Internal Conversion: to lower electronic state of same multiplicity (k File Size: KB. Photochemistry and polymerization of novel 4-alkylamino benzophenone initiators g CONVERN VERSUS EXPOSURE TIME O.l:g w/w ;~ CONVERSION VERSUS EXPOSURE TlllE g w/w Z 0 e~ z o g~ 80 60 40 20 COMPOI, C(NIPOUND I I: COMPOUND I 0 COMPOUND 9 BENZOPHENONE 0~ 0 I 0 20 30 40 50 60 EXPOSURE TIME (SECS) Fig.
by: UV Photochemistry of Peroxyformic Acid (HC(O)OOH): An Experimental and Computational Study Investigating nm Photolysis.
The Journal of Physical Chemistry A(31), Cited by: 1. The purpose of this session of the workshop was to assess the current status of research in, and identify potential applications for, the use of concentrated solar photons in photochemical synthesis and to recommend research directions that could lead to them, or to other, applications.
Session. Novel polymerizable N‐aromatic maleimides as free radical initiators for photopolymerization Article in Polymer International 55(8) - August with 16 Reads How we measure 'reads'. PHOTOCHEMICAL TRANSFORMATIONS OF CARBONYL COMPOUNDS AND SOME MW ASSISTED the organic synthesis, which are the alternative to the conventional heating methods, in accordance with the principles of green chemistry.
Photochemistry is the study of the physical processes or chemical changes which occur in molecules on the absorption of suitable. Synthesis, Spectroscopy and Photochemistry of Novel Branched Fluorescent Nitro-Stilbene Derivatives with Benzopheonone Groups Article in Journal.
Photochemistry in synthesis: Where, when, and why Article (PDF Available) in Pure and Applied Chemistry 79(11) January with 2, Reads How we measure 'reads'. Synthesis and Structure-Activity Relationship of Several Aromatic Ketone-Based Two-Photon Initiators ZHIQUAN LI, 1MARTON SIKLOS, NIKLAS PUCHER, KLAUS CICHA,2 ALIASGHAR AJAMI, 3WOLFGANG HUSINSKY, ARNULF ROSSPEINTNER, 4ERIC VAUTHEY, GEORG GESCHEIDT,5 JU¨ RGEN STAMPFL,2 ROBERT LISKA1 1Institute of Applied Synthetic Chemistry, Division of.
Reactions of ethenes and aromatic compounds - Photo-chemical reactions of the carbonyl chromophore - Photo-oxygenation (singlet oxygen, superoxide anion). Polymer and pigments photochemistry Photopolymerization and cross-linking - Photodegradation and stabilization of polymers and pigments.
Natural photochemical processesFile Size: 48KB. InLi and co-workers developed a novel method for the pinacol reaction, the coupling of aromatic aldehydes and ketones, using solar energy.
The aromatic carbonyl compounds were dissolved in isopropanol and exposed to direct sunlight for 7–10 days to give the corresponding 1,2-diols 92 in high to moderate yield. Photochemistry and photopolymerisation of substituted 2-methylanthraquinones and novel 2-acryloxymethylanthraquinone in radiation curing aromatic carbonyl compounds, the .Novel polymerizableN-aromatic maleimides as free radical initiators for photopolymerization.
Polymer International55 (8), DOI: /pi Cited by: The photochemical synthesis of metal nanoparticles dispersed in 3D epoxy networks involves both the reducing of metal precursors by photogenerated intermediates such as free radicals and the.