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Relevant bibliographies by topics / Ketones. Photochemistry

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Academic literature on the topic 'Ketones. Photochemistry'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Ketones. Photochemistry"

1

Hurrell, L., L. J. Johnston, N. Mathivanan, and D. Vong. "Photochemistry of lignin model compounds on solid supports." Canadian Journal of Chemistry 71, no. 9 (1993): 1340–48. http://dx.doi.org/10.1139/v93-173.

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The photochemistry of several substituted α-(aryloxy)acetoveratrones that are models for chromophores in lignin has been studied using a combination of laser flash photolysis and product studies in solution and on silica, Na-X zeolite, and cellulose. The lifetimes of the triplet ketones vary substantially with the electron-donating ability of the substituents in the α-aryloxy ring, with values ranging from 30 ns for the 4-methoxy derivative to 5.5 µs for the 4-cyano ketone in acetonitrile. The triplet ketones are considerably longer lived on a silica surface than in solution and do not decay w

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2

Boch, R., C. Bohne, J. C. Netto-Ferreira та J. C. Scaiano. "Effect of methyl substitution on the intramolecular triplet deactivation of p-methoxy-β-phenylpropiophenone". Canadian Journal of Chemistry 69, № 12 (1991): 2053–58. http://dx.doi.org/10.1139/v91-297.

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The photochemistry of several methyl-substituted p-methoxy-β-phenylpropiophenones (1–5) has been examined by nanosecond laser flash photolysis using 337-nm laser excitation. The ketone triplets decay by intramolecular β-aryl quenching of the carbonyl in a well-known process that is believed to involve charge transfer. Surprisingly, methyl substitution at the β-methylene group, which is not a participant in the deactiviation mechanism, causes a dramatic decrease in the triplet lifetime; the effect is attributed to different conformational preferences in ketones 1–3 and is rationalized on the ba

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3

Warrier, M., Lakshmi S. Kaanumalle, and V. Ramamurthy. "Alkali metal ion controlled product selectivity during photorearrangements of 1-naphthyl phenyl acylates and dibenzyl ketones within zeolites." Canadian Journal of Chemistry 81, no. 6 (2003): 620–31. http://dx.doi.org/10.1139/v03-041.

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Photochemical behaviors of 1-naphthyl phenyl acylates and dibenzyl ketones included in zeolites have been compared. 1-Naphthyl phenyl acylates while in solution produce eight photoproducts; within NaY it gives a single product. The selectivity is attributed to the restriction brought on the mobility of the primary radical pair by the alkali metal ions present in zeolites. Photochemistry of dibenzyl ketones within NaY reveals that the intersystem crossing in caged radical pairs could be influenced by the heavy alkali metal ions. Structures of complexes among Li+ ion and the guest 1-naphthyl phe

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4

Turro, Nicholas J. "Photochemistry of ketones adsorbed on porous silica." Tetrahedron 43, no. 7 (1987): 1589–616. http://dx.doi.org/10.1016/s0040-4020(01)90273-x.

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5

Sauers, R. R., A. A. Hagedorn, S. D. Van Arnum, R. P. Gomez, and R. V. Moquin. "Synthesis and photochemistry of heterocyclic norbornenyl ketones." Journal of Organic Chemistry 52, no. 25 (1987): 5501–5. http://dx.doi.org/10.1021/jo00234a001.

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6

Jockusch, Steffen, Margaret S. Landis, Beat Freiermuth та Nicholas J. Turro. "Photochemistry and Photophysics of α-Hydroxy Ketones". Macromolecules 34, № 6 (2001): 1619–26. http://dx.doi.org/10.1021/ma001836p.

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Wagner, Peter J., and Harlan W. Frerking Jr. "Photochemistry of nonconjugated diketones: internal self-quenching and energy transfer." Canadian Journal of Chemistry 73, no. 11 (1995): 2047–61. http://dx.doi.org/10.1139/v95-253.

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The triplet state behavior of nine α,ω-dibenzoylalkanes indicates the occurrence of a rapid quenching interaction between the two carbonyl groups. This quenching is fastest (k = 3 × 107 s−1) in dibenzoylbutane, is slightly slower (~107 s−1) in dibenzoylethane, dibenzoylpentane, and 2,2-dibenzoylpropane, but is absent in 1,3-dibenzoylpropane. It also occurs in several "mixed" 1,4-diaroylbutanes incorporating p-ethylbenzoyl or p-methoxybenzoyl chromophores This internal self-quenching is interpreted as the intramolecular counterpart of the well-known bimolecular self-quenching of aryl ketones, a

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8

Wilkinson, F., C. J. Willsher, H. L. Casal, Linda J. Johnston, and J. C. Scaiano. "Intrazeolite photochemistry. IV. Studies of carbonyl photochemistry on the hydrophobic zeolite Silicalite using time-resolved diffuse reflectance techniques." Canadian Journal of Chemistry 64, no. 3 (1986): 539–44. http://dx.doi.org/10.1139/v86-086.

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Transient absorption and luminescence from aromatic ketone triplets (xanthone, acetophenone, butyrophenone, valerophenone, p-methoxyacetophenone, β-phenyl-p-methoxypropiophenone and benzil) supported on the hydrophobic zeolite Silicalite have been obtained by time-resolved diffuse reflectance laser flash photolysis. These experiments were aimed at establishing the usefulness of this technique for studies of zeolite supported photoreactions. While the transient spectral properties can be used to examine the properties of the supporting media, the decays of the signals frequently follow complex

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9

Scaiano, Juan C., José C. Netto-Ferreira, Emilio Alarcon, et al. "Tuning plasmon transitions and their applications in organic photochemistry." Pure and Applied Chemistry 83, no. 4 (2011): 913–30. http://dx.doi.org/10.1351/pac-con-11-01-09.

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The ketone-photoinduced formation of Au, Ag, and Cu nanoparticles from their corresponding ions in solution has been carried out using benzoin photoinitiators. Ketones are good photosensitizers for nanoparticle synthesis not because of the energy they can absorb or deliver, but rather because of the reducing free radicals they can generate. Efficient photochemical nanoparticle generation thus requires a careful selection of substrates and experimental conditions such that free radical generation occurs with high quantum efficiency, where metal ion precursors do not inhibit radical formation. A

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10

Chen, Shuang, Brian O. Patrick, and John R. Scheffer. "Photochemistry of 9-methylbicyclo[3.3.1]nonyl aryl ketones A novel 1,5-disproportionation of 1,4-hydroxy biradicals and asymmetric induction using the solid-state ionic chiral auxiliary method." Canadian Journal of Chemistry 83, no. 9 (2005): 1460–72. http://dx.doi.org/10.1139/v05-147.

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A novel 1,5-disproportionation reaction has been discovered for 1,4-hydroxy biradicals derived from the photolysis of 9-methylbicyclo[3.3.1]nonyl phenyl ketones (1), which undergo mainly Yang cyclization both in solution and the solid state. By applying the solid-state ionic chiral auxiliary method of asymmetric synthesis to the Yang cyclization, enantiomeric excesses as high as 95% were achieved at high reaction conversions. The origin of the reaction selectivity is discussed with the help of X-ray crystallography. In addition, the solid-state photoreaction of ketone 1b was found to occur in

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Dissertations / Theses on the topic "Ketones. Photochemistry"

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Ucak-Astarlioglu, Mine Gunes. "The electronic structure and spectroscopy of diarylidene-cycloalkanones and their protonated cations." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0506103-160044.

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Thesis (Ph. D.)--Worcester Polytechnic Institute.<br>Keywords: polyene ketones; diarylidene-cycloalkanones; spectroscopy; electronic structure; protonated cations; photochemistry; electronic states. Includes bibliographical references (p. 189-191).

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2

Beeby, A. "The photochemistry and photophysics of aldehydes, ketones and simple sugars in solution." Thesis, University of East Anglia, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382884.

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Lathioor, Edward Camiel. "Inter- and intramolecular phenolic hydrogen atom abstraction by aromatic ketone triplets /." *McMaster only, 2001.

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4

Ahmadi, Sara. "Exploring Simple Catalyst for Transfer Hydrogenation of Ketones and Photocatalytic Hydrogen Production Using Homogeneous Metal Complexes." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39622.

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Transfer hydrogenation has been recognized to be an important synthetic method in both academic and industrial research to obtain valuable products including alcohols. Transition metal catalysts based on precious metals, such as Ru, Rh and Ir, are typically employed for this process. This thesis starts with a study on the potential of an Fe based complex carrying a PNP ligand (2,6-{Ph2PNH}2(NC5H3)) to function as an active transfer hydrogenation catalyst for the conversion of ketones to alcohols. During the analysis of the performance parameters of this potential catalyst, it was discovered t

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Smith, Kenneth Christopher. "Photochemistry of urea/ketone inclusion compounds." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq24919.pdf.

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Liu, Yao. "Etudes des impacts de la réactivité en phase aqueuse atmosphérique sur la formation et le vieillissement des Aérosols Organiques Secondaires sous conditions simulées." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10030/document.

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Cette étude se focalise sur les impacts de la réactivité en phase aqueuse de la méthacroléïne et de la méthyl vinyl cétone sur la formation des nouveaux aérosols organiques secondaires (AOS), et les impacts de la réactivité en phase aqueuse sur le vieillissement des AOS formés par l’isoprène, α-pinène et 1,3,5-triméthylbenzène en phase gazeuse. Les études de la réactivité en phase aqueuse ont été étudiées vis-à-vis des radicaux OH. Dans le but d’identifier et quantifier les produits d’oxydation des différents précurseurs d’intérêt, les échantillons en phase aqueuse ont été analysés par différe

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Wang, Keyan. "Asymmetric induction in the photochemistry of α-oxoamides and bicycle aryl ketones". Thesis, 2004. http://hdl.handle.net/2429/16152.

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Enantioselective photochemical synthesis of a β-lactam (methyl 4-[3-hydroxy-2,2- dimethyl-l-(l-methylethyl)-4-oxo-3-azetidinyl]benzoate) was investigated via the ionic chiral auxiliary method. Solid state photolysis of the chiral salts formed from optically pure amines and the achiral α-oxoamide reactant containing a carboxylic acid functional group gave variable results, but through the use of a number of auxiliaries it was possible to achieve a high degree of enantioselectivity in the β-lactam (up to 99 % ee at 99 % conversion of the starting α-oxoamide). Suspension of the prolinamide

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Venkatraman, Ravi Kumar. "Solvent Effects on Photochemistry and Photophysics of Aromatic Carbonyls : A Raman and Computational study." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2921.

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Solvent effects play diverse roles in myriads of chemical, physical and biological processes. The solvent interacts with the solute by: i) non-specific (Coulombic, van der Waals interactions) and ii) specific interactions (hydrogen bonding, etc.). These interactions are responsible for solvation of the solute and are collectively termed as “solvent polarity”. Differential solvation of ground and excited electronic states is manifested in the absorption spectrum as a change in the band position, intensity or shape, which is termed as “solvatochromism”. Intermolecular hydrogen bonding (IHB) is a

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Pandey, Rishikesh. "Understanding Solvent Effect On Triplet State Structure Of Thioxanthone And Its Derivatives Using Time-Resolved Resonance Raman Spectroscopy." Thesis, 2012. http://hdl.handle.net/2005/2307.

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It has long been recognized that course and efficiency of a chemical reaction is largely mediated by the short-lived transient species (excited state or radicals) which are formed as reactive intermediates during a chemical reaction. Subtle changes not only in the bonding and electronic distributions but also in the conformations and geometries of these intermediates have a dramatic influence on the reactivity. A detailed understanding of the structural and dynamical aspects of electronic excited states is therefore essential towards unraveling photoinduced natural processes and for designing

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Books on the topic "Ketones. Photochemistry"

1

Nispen, Reinier van. Photochemistry and spectroscopy of some steroidal [beta], [gamma]-unsaturated ketones: A geometry-photoreactivity study. Offsetdrukkerij Haveka B.V., 1992.

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2

Marciniak, Bronisław. Badania mechanizmu sensybilizowanej fotoredukcji 1,3-diketonianów metali w roztworach. Wydawn. Nauk. Uniwersytetu im. A. Mickiewicza w Poznaniu, 1989.

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3

Zerizer, Hafiza. Synthesis and photochemistry of B-amino-ketones and A-substituted succinimides. University of Salford, 1985.

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4

Beeby, Andrew. The photochemistry and photophysics of aldehydes, ketones and simple sugars in solution. University of East Anglia, 1988.

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5

Stiver, Shirley Irene *. The photochemistry of alpha-ketols. 1985.

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Book chapters on the topic "Ketones. Photochemistry"

1

Srinivasan, R. "Photochemistry of the Cyclic Ketones." In Advances in Photochemistry. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470133316.ch4.

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2

Lee, Edward K. C., and Roger S. Lewis. "Photochemistry of Simple Aldehydes and Ketones in the Gas Phase." In Advances in Photochemistry. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470133422.ch1.

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3

Schaffner, Kurt. "Photochemical Rearrangements of Conjugated Cyclic Ketones: The Present State of Investigations." In Advances in Photochemistry. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470133347.ch4.

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4

Buchachenko, A. L., E. N. Step, V. F. Tarasov, and I. A. Shkrob. "Magnetic Effects in the Photochemistry of Ketones." In Organic Free Radicals. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73963-7_8.

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Formosinho, Sebastião J., and Luis G. Arnaut. "A Unified View of Ketone Photochemistry." In Advances in Photochemistry. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470133460.ch2.

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6

GUILLET, J. E., S. K. L. LI, and H. C. Ng. "Photochemistry of Ketone Polymers in the Solid Phase: A Review." In ACS Symposium Series. American Chemical Society, 1985. http://dx.doi.org/10.1021/bk-1984-0266.ch006.

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7

GUILLET, J. E., S. K. L. LI, S. A. MACDONALD, and C. G. WILLSON. "Photochemistry of Ketone Polymers in the Solid Phase: Thin Film Studies of Vinyl Ketone Polymers." In ACS Symposium Series. American Chemical Society, 1985. http://dx.doi.org/10.1021/bk-1984-0266.ch019.

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8

Campagne, J. M., and Y. Six. "Photochemistry." In Ketones. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-026-00944.

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9

"PHOTOCHEMISTRY OF QUINONES AND KETONES." In Chemistry in Microtime. PUBLISHED BY IMPERIAL COLLEGE PRESS AND DISTRIBUTED BY WORLD SCIENTIFIC PUBLISHING CO., 1997. http://dx.doi.org/10.1142/9781848161047_0008.

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10

Pischel, Uwe, and Werner Nau. "Photoreactivityof n,_*-Excited Azoalkanesand Ketones." In Molecular and Supramolecular Photochemistry. CRC Press, 2005. http://dx.doi.org/10.1201/9781420036992.ch3.

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Conference papers on the topic "Ketones. Photochemistry"

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Talukdar, Ranajit K., J. B. Burkholder, T. Gierczak, A. Mellouki, S. Barone, and A. R. Ravishankara. "Application of optical techniques to studies of kinetics and photochemistry - Tropospheric fate of Methyl Vinyl Ketone and Methacrolein." In Environmental Sensing '92, edited by Harold I. Schiff and Ulrich Platt. SPIE, 1993. http://dx.doi.org/10.1117/12.140206.

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