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Journal articles on the topic 'Acetona triplete'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ramnauth, Jailall, and Edward Lee-Ruff. "Photochemical preparation of cyclopropanes from cyclobutanones." Canadian Journal of Chemistry 79, no. 2 (2001): 114–20. http://dx.doi.org/10.1139/v00-175.

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A general method for the preparation of cyclopropanes is reported. Triplet-photosensitized reactions of a series of cyclobutanones give cyclopropanes as the major product. Part 1 describes the synthesis of substituted cyclobutanones used in this study. In Part 2, the photo-reactions of cyclobutanones are reported. Triplet-sensitized reactions of cyclobutanones using acetone as a sensitizer give cyclopropanes as the major non-polar products. The extent of photodecarbonylation seems to be dependent on α-substitution. Electron-donating groups promote decarbonylation while electron-withdrawing gro

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2

Zuckermann, Hanna, Bernhard Schmitz, and Yehuda Haas. "Dissociation energy of an isolated triplet acetone molecule." Journal of Physical Chemistry 92, no. 17 (1988): 4835–37. http://dx.doi.org/10.1021/j100328a007.

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3

Copeland, Richard A., and David R. Crosley. "Radiative, collisional and dissociative processes in triplet acetone." Chemical Physics Letters 115, no. 4-5 (1985): 362–68. http://dx.doi.org/10.1016/0009-2614(85)85149-6.

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4

Lu, Chen, Natalia Eugenia Gutierrez-Bayona, and John-Stephen Taylor. "The effect of flanking bases on direct and triplet sensitized cyclobutane pyrimidine dimer formation in DNA depends on the dipyrimidine, wavelength and the photosensitizer." Nucleic Acids Research 49, no. 8 (2021): 4266–80. http://dx.doi.org/10.1093/nar/gkab214.

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Abstract Cyclobutane pyrimidine dimers (CPDs) are the major products of DNA produced by direct absorption of UV light, and result in C to T mutations linked to human skin cancers. Most recently a new pathway to CPDs in melanocytes has been discovered that has been proposed to arise from a chemisensitized pathway involving a triplet sensitizer that increases mutagenesis by increasing the percentage of C-containing CPDs. To investigate how triplet sensitization may differ from direct UV irradiation, CPD formation was quantified in a 129-mer DNA designed to contain all 64 possible NYYN sequences.

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5

Ang, Kiah H., and Rolf H. Prager. "The Chemistry of 5-Oxodihydroisoxazoles. XX Photolysis of 2,4-Diphenylisoxazol-5(2H)-one: Evidence for Singlet and Triplet Pathways." Australian Journal of Chemistry 51, no. 6 (1998): 483. http://dx.doi.org/10.1071/c97194.

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2,4-Diphenylisoxazol-5(2H)-one (2) has been photolysed in the presence of alcohols, amines and in inert solvents, and the products are shown to arise by two competitive singlet state photolytic processes. The minor pathway involves loss of carbon dioxide to give an imino carbene which is captured by nucleophiles: the major pathway involves isomerization to a ketene which is rapidly decarbonylated, and the resultant carbene captured by solvent. The presence of acetone or other triplet sensitizers induces a third competitive pathway involving triplet states.

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6

Silva, Eduardo, Ana M. Edwards, and Adelaide Faljoni-Alario. "Enzymatic generation of triplet acetone by deglycosylated horseradish peroxidase." Archives of Biochemistry and Biophysics 276, no. 2 (1990): 527–30. http://dx.doi.org/10.1016/0003-9861(90)90754-m.

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7

Stevens, James R., and Per Jacobsson. "A comparison of acetone and poly(propylene glycol) as solvents for lithium triflate and lithium perchlorate." Canadian Journal of Chemistry 69, no. 12 (1991): 1980–84. http://dx.doi.org/10.1139/v91-285.

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Solutions of LiCF3SO3 and LiClO4 in acetone and in poly(propylene glycol) (PPG 400 and PPG 4000) have been compared by studying the nondegenerate, symmetric stretch (A1,SO3) and (A1,ClO4) Raman modes. The Raman spectra contain bands due to the symmetric stretching motion of the "free" anion and due to the symmetric stretching motion of anions in ion aggregates. It is concluded that "free" ions, ion pairs, triplets, and aggregates are present. Although PPG has a much lower dielectric constant, it is a better solvent for these salts than the dipolar aprotic acetone. These findings have ramificat

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8

ESCOBAR, JORGE A., GIUSEPPE CILENTO, and ANA L. T. O. NASCIMENTO. "EFFECTS INDUCED IN NEUTROPHILS BY A PRECURSOR OF TRIPLET ACETONE." Photochemistry and Photobiology 51, no. 6 (1990): 713–17. http://dx.doi.org/10.1111/php.1990.51.6.713.

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9

Inoue, Akinori, and Nozomu Ebara. "Electron-impact-induced luminescence and triplet-state dynamics of acetone and perdeuterated acetone at low pressures." Chemical Physics Letters 126, no. 1 (1986): 58–62. http://dx.doi.org/10.1016/0009-2614(86)85116-8.

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10

Ramnauth, Jailall, and Edward Lee-Ruff. "Photodecarbonylation of chiral cyclobutanones." Canadian Journal of Chemistry 75, no. 5 (1997): 518–22. http://dx.doi.org/10.1139/v97-060.

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Triplet photosensitized irradiation of 2(S),3(R)-bis[(benzoyloxy)methyl]cyclobutanone gave optically pure (−)E-1(S),2(S)-bis(benzoyloxymethyl)cyclopropane as a major product in the nonpolar fraction along with its stereoisomer and cycloelimination products. The absolute stereochemistry of the chiral cyclopropane was established by independent synthesis and X-ray crystal structure determination of a synthetic precursor. The distribution of decarbonylation and cycloelimination products was inversely dependent on the concentration of the substrate. Irradiation of the same ketone in tetrahydrofura

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11

DeVoe, R. J., M. R. V. Sahyun, E. Schmidt, Mahin Sadrai, N. Serpone, and D. K. Sharma. "Photophysics of bis(p-N,N-dimethylamino)benzylidene acetone: Does photoinduced electron transfer occur from a twisted excited state?" Canadian Journal of Chemistry 67, no. 10 (1989): 1565–75. http://dx.doi.org/10.1139/v89-239.

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Photoexcitation of the title compound (DMBA) in polar solvents leads to sequential formation of at least three excited species as detected by laser transient absorption spectroscopy: the lowest Franck–Condon singlet, a twisted singlet (P-state), and the lowest triplet states. Only the initially formed, localized singlet is emissive under our conditions. Interystem crossing to triplet occurs primarily from the twisted P-state in acetonitrile and in methanol. Photo-CIDNP and quantum yield measurements indicate that electron transfer occurs exclusively from the triplet in acetonitrile or methanol

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12

Yamauchi, Seigo, Keisuke Tominaga, and Noboru Hirota. "Existence of the triplet mechanism in the CIDEP spectrum of acetone." Journal of Physical Chemistry 90, no. 11 (1986): 2367–69. http://dx.doi.org/10.1021/j100402a024.

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13

Indig, Guilherme L., Ana Campa, Etelvino J. H. Bechara, and Giuseppe Cilento. "CONJUGATED DIENE FORMATION PROMOTED BY TRIPLET ACETONE ACTING UPON ARACHIDONIC ACID." Photochemistry and Photobiology 48, no. 5 (1988): 719–23. http://dx.doi.org/10.1111/j.1751-1097.1988.tb02886.x.

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14

Baader, W. J., C. Bohne, G. Cilento, and L. Nassi. "Enzymatic generation of triplet acetone: A window to photobiochemistry without light." Biochemical Education 14, no. 4 (1986): 190–92. http://dx.doi.org/10.1016/0307-4412(86)90216-5.

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15

Menck, Carlos F. M., Januárico B. Cabral-Neto, A. Faljoni-Alário та Roberto Alcantara-Gomes. "Damages induced in λ phage DNA by enzyme-generated triplet acetone". Mutation Research/DNA Repair Reports 165, № 1 (1986): 9–14. http://dx.doi.org/10.1016/0167-8817(86)90003-9.

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16

Gehrtz, M., Chr Bräuchle, and J. Voitländer. "Acetone in its lowest excited triplet state: an isotope dependent ODMR study." Journal of Molecular Structure 141 (March 1986): 437–40. http://dx.doi.org/10.1016/0022-2860(86)80364-7.

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17

Guillet, J. E., A. N. Ainscough, T. Kilp, S. Poos, and N. J. Turro. "Studies of the role of acetone triplets in the initiation of vinyl polymerization." Polymer Photochemistry 7, no. 6 (1986): 439–46. http://dx.doi.org/10.1016/0144-2880(86)90013-8.

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18

Indig, G. L., L. H. Catalani, and T. Wilson. "Quenching of triplet acetone by mesitylene and durene: exciplex formation or energy transfer?" Journal of Physical Chemistry 96, no. 22 (1992): 8967–73. http://dx.doi.org/10.1021/j100201a050.

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19

Baader, W. J., C. Bohne, G. Cilento, and H. B. Dunford. "Peroxidase-catalyzed formation of triplet acetone and chemiluminescence from isobutyraldehyde and molecular oxygen." Journal of Biological Chemistry 260, no. 18 (1985): 10217–25. http://dx.doi.org/10.1016/s0021-9258(17)39234-7.

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20

Martı́nez-Núñez, E., A. Fernández-Ramos, M. N. D. S. Cordeiro, S. A. Vázquez, F. J. Aoiz, and L. Bañares. "A direct classical trajectory study of the acetone photodissociation on the triplet surface." Journal of Chemical Physics 119, no. 20 (2003): 10618–25. http://dx.doi.org/10.1063/1.1622387.

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21

Silva, Eduardo, and Giuseppe Cilento. "DUAL EFFECTS OF TRYPTOPHAN IN THE HORSERADISH PEROXIDASE SYSTEM THAT GENERATES TRIPLET ACETONE." Photochemistry and Photobiology 50, no. 2 (1989): 259–62. http://dx.doi.org/10.1111/j.1751-1097.1989.tb04157.x.

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22

Leuschner, Rainer, and Hanns Fischer. "Type I cleavage of triplet acetone in solution studied by time-resolved CIDNP." Chemical Physics Letters 121, no. 6 (1985): 554–58. http://dx.doi.org/10.1016/0009-2614(85)87140-2.

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23

Cristol, Stanley J., Dieter Braun, George C. Schloemer, and Bart J. Vanden Plas. "Photochemical transformations. 42. Photoreactions of certain bridged bicyclic and tricyclic chlorides and bromides containing aromatic chromophores." Canadian Journal of Chemistry 64, no. 6 (1986): 1081–84. http://dx.doi.org/10.1139/v86-181.

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Irradiations of a number of bicyclic and tricyclic bromides and chlorides containing aromatic rings have been carried out. With the allylic chlorides 2-Cl and 3-Cl, triplet-sensitized photoreactions in acetone (or in acetonitrile with acetophenone sensitizer) lead to allylic scrambling and allyl-to-cyclopropyl isomerization to 5-Cl, while the corresponding bromides, under similar conditions, give allylic scrambling, photo-Wagner–Meerwein rearrangement, and photosolvolysis, but no allyl-to-cyclopropyl isomerization. The differences in reaction types are ascribed to the requirement for intramole

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24

Tsui, S. M., and W. Chu. "Photocatalytic degradation of dye pollutants in the presence of acetone." Water Science and Technology 44, no. 6 (2001): 173–80. http://dx.doi.org/10.2166/wst.2001.0368.

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The photodegradation of textile azo dyes in aqueous solution containing acetone (ACE) photosensitizer was investigated at 253.7 nm. In this study, a typical azo reactive dye (C I Reactive Red 2 - RR2) is used as the probe compound. ACE is a powerful photosensitizer that possesses high triplet energy, and the presence of ACE significantly enhances the overall photodegradation reaction through simultaneous sensitization. In the UV/ACE system, at the optimum conditions, over 97% of RR2 can be successfully decomposed and decolored within 300 seconds of retention time. The photodegradation mechanis

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25

Harvey, Pierre D., and Jeff G. Sharman. "Characterization and spectroelectrochemical properties of a binuclear trans,trans-bis(ferrocenylidene)acetone [(C5H5)Fe(C5H4CHCH)]2CO." Canadian Journal of Chemistry 68, no. 2 (1990): 223–27. http://dx.doi.org/10.1139/v90-029.

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The binuclear compound trans,trans-bis(ferrocenylidene)acetone [(C5H5)Fe(C5H4CHCH)]2CO (dFca) has been synthesized in quantitative yield and characterized by FT-IR, 1H and 13C NMR, and mass spectroscopy. Cyclic voltammetry and coulometry measurements suggest that a reversible two-electron oxidative process takes place at 0.68 V vs. SSCE. FT-IR and UV–VIS spectroelectrochemical analyses show that this oxidative process occurs at the ferrocenyl centers. The compound is also found to be emissive in the solid state (λmax = 780 nm), and charge transfer assignments for the lowest singlet and triplet

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26

ROJAS, JORGE, and EDUARDO SILVA. "PHOTOCHEMICAL-LIKE BEHAVIOUR OF RIBOFLAVIN IN THE DARK PROMOTED BY ENZYME-GENERATED TRIPLET ACETONE." Photochemistry and Photobiology 47, no. 3 (1988): 467–70. http://dx.doi.org/10.1111/j.1751-1097.1988.tb02753.x.

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27

Johnston, L. J., J. C. Scaiano, and T. Wilson. "A long-lived triplet exciplex of acetone and durene. Absorption spectrum, energy transfer and kinetics." Journal of the American Chemical Society 109, no. 5 (1987): 1291–97. http://dx.doi.org/10.1021/ja00239a001.

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28

Nascimento, Ana Lucia T. O., Luis Marcos da Fonseca, Iguatemy L. Brunetti, and Giuseppe Cilento. "Intracellular generation of electronically excited states. Polymorphonuclear leukocytes challenged with a precursor of triplet acetone." Biochimica et Biophysica Acta (BBA) - General Subjects 881, no. 3 (1986): 337–42. http://dx.doi.org/10.1016/0304-4165(86)90024-3.

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29

Tokumura, Kunihiro, Kaoru Endo, and Michiya Itoh. "Effective fluorescence quenching and triplet sensitization N,N,N′,N′-tetramethyl-p-phenylenediamine by acetone." Journal of Photochemistry 30, no. 2 (1985): 247–51. http://dx.doi.org/10.1016/0047-2670(85)85029-2.

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30

Harvey, Pierre D., and Benoit Daoust. "Nature and characterization of the singlet and triplet excited states of the dibenzylideneacetone and di-3-(N-ethylcarbazoylidene)acetone bridging ligands." Canadian Journal of Chemistry 70, no. 11 (1992): 2777–84. http://dx.doi.org/10.1139/v92-353.

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The lowest energy singlet state in di-3-(N-ethylcarbazoylidene)acetone (dNECa), a luminescent model compound at room temperature for dibenzylideneacetone (dba), has been assigned to a charge transfer (CT) state using the medium polarity effect on λmax(F) and the fluorescence polarized spectra of dNECa at 77 K. The dNECa fluorescence quantum yields [Formula: see text] and lifetimes (τF) are solvent sensitive where both [Formula: see text] and τF tend to increase with polarity. The very weak and moderately structured phosphorences have been located for the first time for both dba and dNECa in th

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31

Curtis, NF, and GJ Gainsford. "Studies of Some Tetraazacyclopentadecadiene Complexes of Nickel(II). The Crystal and Molecular-Structure of (1RS,8SR)-(5,7,7,13,15,15-Hexamethyl-1,4,8,12-Tetraazacyclopentadeca-4,1 2-Diene)Nickel(II) Perchlorate Hydrate." Australian Journal of Chemistry 39, no. 10 (1986): 1509. http://dx.doi.org/10.1071/ch9861509.

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The crystal and molecular structure has been determined by X-ray diffractometry for the singlet ground state nickel(II) compound of a fifteen- membered tetraaza macrocyclic ligand , formed by reaction of a mixture of tris ( ethanediamine )nickel(II) and tris (propane-1,3- diamine )nickel(II) perchlorates with acetone. The compound, (1RS,8SR)- 5,7,7,13,15,15-hexamethyl-1,4,8,12-tetraazacyclopentadeca-4,12- diene )nickel(II) perchlorate hydrate, [Ni( hmpd )](ClO4)2.H2O, is monoclinic, space group P21/C, a 1158.76(14), b 1319.53(22), c 1630.35(21) pm, β 96.209(10)°, R 0.046, Rw 0.062 for 2798 ref

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32

Brancato, Giuseppe, Nadia Rega, and Vincenzo Barone. "A discrete/continuum QM/MM MD study of the triplet state of acetone in aqueous solution." Chemical Physics Letters 453, no. 4-6 (2008): 202–6. http://dx.doi.org/10.1016/j.cplett.2008.01.045.

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33

Griffiths, W. J., A. Naves de Brito, N. Correia, J. C. Severs, and F. M. Harris. "Triplet electronic states of the doubly charged ion of acetone: a combined theoretical and experimental study." International Journal of Mass Spectrometry and Ion Processes 134, no. 2-3 (1994): 197–201. http://dx.doi.org/10.1016/0168-1176(94)03983-6.

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34

Paleta, Oldřich, Jaroslav Kvíčala, Zuzana Budková, and Hans-Joachim Timpe. "Radical Additions to Fluoroolefins: Experimental Evidence for a Free-Radical Chain Mechanism in the Photo-Initiated Addition of Alcohols to Fluoroolefins." Collection of Czechoslovak Chemical Communications 60, no. 4 (1995): 636–44. http://dx.doi.org/10.1135/cccc19950636.

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Photo-initiated addition of 2-propanol to two fluoroolefinic compounds, i.e. methyl 2,4,4,5,6,6-hexafluoro-3-oxa-2-(trifluoromethyl)hex-5-enoate (IV) containing perfluoroallyloxy group and 8,9-dichloro-1,1,2,4,4,5,7,7,8,9,9-undecafluoro-3,6-dioxa-5-(t rifluoromethyl)dodec-1-ene (V) containing trifluorovinyloxy group were used to verify a free-radical chain mechanism by means of quantum yield measurements based on substrate-decay kinetic. UV-Light energy (254 nm) was transferred to the reaction system via triplet-excited acetone. Quantum yields Fi of the addition products (X, XI) reached values

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35

Noh, Taehee, Xue Gong Lei, and Nicholas J. Turro. "Photochemistry of .alpha.-(o-tolyl)acetone and some derivatives: triplet .alpha.-cleavage and singlet .delta.-hydrogen abstraction." Journal of the American Chemical Society 115, no. 8 (1993): 3105–10. http://dx.doi.org/10.1021/ja00061a008.

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36

Tachikawa, Hiroto, and Hiroshi Kawabata. "Direct ab initio MD study on the hydrogen abstraction reaction of triplet state acetone from methanol molecule." Theoretical Chemistry Accounts 128, no. 2 (2010): 207–13. http://dx.doi.org/10.1007/s00214-010-0822-7.

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37

Anpo, Masakazu. "The Effect of Surface Hydroxyl Groups upon the Deactivation of Excited Triplet Acetone Adsorbed on Porous Vycor Glass." Chemistry Letters 16, no. 6 (1987): 1221–24. http://dx.doi.org/10.1246/cl.1987.1221.

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38

Bogan, Denis J., and Dong Heon Lee. "Triplet-state chemiluminescence: acetone T1 from the decomposition of chemically activated 3,3-dimethyl-4-(N,N-dimethylamino)-1,2-dioxetane." Journal of Physical Chemistry 95, no. 4 (1991): 1533–35. http://dx.doi.org/10.1021/j100157a006.

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39

NOH, T., X. G. LEI та N. J. TURRO. "ChemInform Abstract: Photochemistry of α-(o-Tolyl)acetone and Some Derivatives: Triplet α-Cleavage and Singlet δ-Hydrogen Abstraction." ChemInform 24, № 33 (2010): no. http://dx.doi.org/10.1002/chin.199333091.

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40

Song, Qinhua, Weizhen Lin, Side Yao, and Nianyun Lin. "Comparative studies of triplet states of thymine components by acetone sensitization and direct excitation in aqueous solution at room temperature." Journal of Photochemistry and Photobiology A: Chemistry 114, no. 3 (1998): 181–84. http://dx.doi.org/10.1016/s1010-6030(98)00219-6.

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41

Paszner, Laszlo, and H. J. Cho. "High Efficiency Conversion of Lignocellulosics to Sugars for Liquid Fuel Production by the ACOS Process." Energy Exploration & Exploitation 6, no. 1 (1988): 39–60. http://dx.doi.org/10.1177/014459878800600104.

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Decline of world oil reserves and pollution problems from burning of fossil fuels and lead require that methods for safe alternate liquid fuels be developed. Ethanol is one of the most important alternate liquid fuels since it can be produced readily by fermentation of sugars. Wood and vegetable growth are excellent sources of sugars to support an ethanol fuel economy of significant proportions. Acid Catalysed Organosolv Saccharification (ACOS) is a new means for total biomass dissolution and recover of component sugars and lignin from wood. The process uses an acidified aqueous acetone soluti

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42

BOGAN, D. J., and D. H. LEE. "ChemInform Abstract: Triplet-State Chemiluminescence: Acetone T1 from the Decomposition of Chemically Activated 3,3-Dimethyl-4-(N,N-dimethylamino)-1,2-dioxetane." ChemInform 22, no. 21 (2010): no. http://dx.doi.org/10.1002/chin.199121091.

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43

Lockyer, Nicholas P., and John C. Vickerman. "Single Photon Ionisation Mass Spectrometry Using Laser-Generated Vacuum Ultraviolet Photons." Laser Chemistry 17, no. 3 (1997): 139–59. http://dx.doi.org/10.1155/1997/53174.

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This paper provides an overview of the method of single photon ionisation mass spectrometry. A review of the theory of frequency upconversion using third-order 4- wave sum mixing in isotropic media and experimental results of third harmonic generation (THG) using a frequency tripled 355 nm Nd:YAG pump source are presented. Vacuum Ultra-violet (VUV) photons of wavelength 118 nm are detected in an acetone ionisation chamber. The emphasis of this paper is on the practical aspects of generating and detecting the VUV photons and using them for single photon ionisation (SPI) in the ion source of a m

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44

Curtis, Neil F., Olga P. Gladkikh, Keith R. Morgan та Sarah L. Heath. "Di-μ-olato dinuclear copper(II) compounds. The structure of bis-μ-O-[(4,6,6-trimethyl-9-(pyridin-2-yl)-3,7-diazanon-3-en-1-olato)copper(II)] perchlorate". Australian Journal of Chemistry 53, № 8 (2000): 673. http://dx.doi.org/10.1071/ch99178.

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Preparations are reported for blue-green[{Cu(pyen)(eto)}2](ClO4)2[pyen is 2-(2-aminoethyl)pyridine, eto– isdeprotonated 2-aminoethanol] and of green[{Cu(pyaceto)}2](ClO4)2,formed by reaction of this compound with acetone[pyaceto– is deprotonated4,6,6-trimethyl-9-(pyridin-2-yl)-3,7-diazanon-3-en-1-ol]. The structureof[{Cu(pyaceto)}2](ClO4)2shows a unit cell containing two independent, but closely similar,centrosymmetrical dinuclear diolato-bridged cations. The copper(II) ions arein square pyramidal coordination, with the two bridging oxygen atoms, and theimine and secondary amine nitrogen atoms

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45

Blitz, Mark A., Dwayne E. Heard, and Michael J. Pilling. "Study of Acetone Photodissociation over the Wavelength Range 248−330 nm: Evidence of a Mechanism Involving Both the Singlet and Triplet Excited States†." Journal of Physical Chemistry A 110, no. 21 (2006): 6742–56. http://dx.doi.org/10.1021/jp056276g.

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46

Grimme, Stefan, and Herbert Dreeskamp. "Singlet- and triplet-state photodissociation of CO and CN bonds in aromatic acetones studied by 1H-CIDNP spectroscopy." Journal of Photochemistry and Photobiology A: Chemistry 65, no. 3 (1992): 371–82. http://dx.doi.org/10.1016/1010-6030(92)80018-q.

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47

Fleming, S. A., L. Renault, E. C. Grundy, and J. A. Pincock. "The photochemistry of ring-substituted cinnamyl acetates." Canadian Journal of Chemistry 84, no. 9 (2006): 1146–54. http://dx.doi.org/10.1139/v06-140.

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The photochemistry of the (E)-cinnamyl acetates ((E)-1-aryl-3-propenyl acetates, 8a–8e) with substituents H, 4-CH3O, 3-CH3O, 4-CF3, and 3-CF3, respectively, was examined in both cyclohexane and methanol solvents. Alkene isomerization (E to Z) occurred more efficiently than other reactions and evidence is presented that this process occurs from the excited triplet state. In a slower process, 1,3-migration of the acetoxy group led to the rearranged 3-aryl-3-propenyl acetate isomers (9a–9e) as the major pathway, particularly in cylohexane. In methanol, the isomeric ethers 3-aryl-3-methoxypropene

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48

Obšil, Tomáš, Evžen Amler, and Zdeněk Pavlíček. "Effect of Enzymically Generated Electronic-Excited Species on Membrane-Bound Na+,K+-ATPase." Collection of Czechoslovak Chemical Communications 61, no. 1 (1996): 160–70. http://dx.doi.org/10.1135/cccc19960160.

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The effect of electronic-excited species generated by systems 2-methylpropanal (MPAL) plus horse-radish peroxidase (HRP) and glyceraldehyde (GCA) plus HRP on Na+,K+-ATPase activity was investigated. For the system MPAL-HRP (which generates triplet acetone) Na+,K+-ATPase activity, the concentration of malondialdehyde, the membrane lateral pressure and the collisional quenching of protein tryptophan residues by NaI were determined. The enzyme activity decreased by 70% during the incubation. Lipid peroxidation products were increased to a steady state level from 5.5 ± 0.5 to 22.6 ± 0.7 nmol malon

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Nowak-Król, Agnieszka, Łukasz G. Łukasiewicz, Joy E. Haley, et al. "Soluble meso-tetrakis(arylethynyl)porphyrins — synthesis and optical properties." Journal of Porphyrins and Phthalocyanines 18, no. 10n11 (2014): 998–1013. http://dx.doi.org/10.1142/s1088424614500904.

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Trans- A 2 B 2-tetrakis(arylethynyl)porphyrins with suitable solubility in CH 2 Cl 2, CHCl 3, EtOAc , acetone and toluene have been obtained for the first time. Among two possible strategies the one comprising the synthesis of 5,15-dibromo-10,20-bis[(isopropylsilyl)ethynyl]porphyrin proved to be more efficient. The pathway towards densely substituted arylacetylenes has been optimized. The use of previously identified 3,4,5-trialkoxyaryl substituent was crucial for achieving the reasonable solubility. The optical properties of meso-substituted tetrakis(arylethynyl)porphyrins were studied showin

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Pischel, Uwe, and Werner M. Nau. "Switch-Over in Photochemical Reaction Mechanism from Hydrogen Abstraction to Exciplex-Induced Quenching: Interaction of Triplet-Excited versus Singlet-Excited Acetone versus Cumyloxyl Radicals with Amines." Journal of the American Chemical Society 123, no. 40 (2001): 9727–37. http://dx.doi.org/10.1021/ja011212e.

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