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Fluorescence probing in micellar solutions: organic additives in micelles of sodium dodecylsulphate 胶束溶液中的荧光探测:十二烷基硫酸钠胶束中的有机添加剂
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87046-6
Angelos Malliaris
{"title":"Fluorescence probing in micellar solutions: organic additives in micelles of sodium dodecylsulphate","authors":"Angelos Malliaris","doi":"10.1016/0047-2670(87)87046-6","DOIUrl":"10.1016/0047-2670(87)87046-6","url":null,"abstract":"<div><p>The changes induced in the structure of micelles of sodium dodecylsulphate when alkanes, alcohols and ketones are solubilized were studied by steady state fluorescence probing methods. Important information concerning micellar properties, such as size, micropolarity, interfacial charge density etc., obtained from fluorescence measurements are presented and some general trends are discussed.</p></div>","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 79-85"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87046-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77110896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The influence of substituents on the photodehydrocyclization of 1,2-diphenylcyclopentenes I: Para substituents 取代基对1,2-二苯基环戊烯光脱氢反应的影响ⅰ:对取代基
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87051-X
J.B.M. Somers, W.H. Laarhoven
{"title":"The influence of substituents on the photodehydrocyclization of 1,2-diphenylcyclopentenes I: Para substituents","authors":"J.B.M. Somers,&nbsp;W.H. Laarhoven","doi":"10.1016/0047-2670(87)87051-X","DOIUrl":"https://doi.org/10.1016/0047-2670(87)87051-X","url":null,"abstract":"<div><p>The photodehydrocyclization of several mono-para-substituted 1,2-diphenylcyclopentenes into a phenanthrene derivative has been investigated under several conditions. It was found that the relative quantum yield of phenanthrene formation in methanol depends on the substituent when an oxidant with low efficiency (<em>e.g.</em> atmospheric oxygen) is used. In cyclohexane solution or in the presence of a more efficient oxidant, no significant substituent influence was observed. Furthermore, it has been established that the thermal ring opening of the primary photocyclization product dihydrophenanthrene (DHP) is influenced by substituents: an isokinetic relationship was found for this reaction but a linear Hammett relation was not observed. From these results it was concluded that the primary photocyclization step is not influenced by substituents. The quantum yield of product formation is influenced under conditions where thermal ring opening and oxidation of the intermediate DHP become competitive reactions (<em>i.e.</em> at low oxidation rates). The differences between the photocyclization behaviours of 1,2-diphenylcyclopentenes and stilbenes are discussed.</p></div>","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 125-143"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87051-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91734353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Simple relation between Arrhenius activation parameters for non-radiative processes from proton-transferred forms of intramolecularly hydrogen-bonded molecules 分子内氢键分子质子转移形式非辐射过程中Arrhenius活化参数的简单关系
Journal of Photochemistry Pub Date : 1987-09-01 DOI: 10.1016/0047-2670(87)87054-5
S. Nagaoka
{"title":"Simple relation between Arrhenius activation parameters for non-radiative processes from proton-transferred forms of intramolecularly hydrogen-bonded molecules","authors":"S. Nagaoka","doi":"10.1016/0047-2670(87)87054-5","DOIUrl":"https://doi.org/10.1016/0047-2670(87)87054-5","url":null,"abstract":"","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"50 1","pages":"185-188"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80953531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Mechanism of the photoisomerization of 1,3-diphenylallyl carbanion 1,3-二苯丙烯基碳离子的光异构化机理
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87050-8
Sucha S. Parmar, Brian Brocklehurst, Ronald N. Young
{"title":"Mechanism of the photoisomerization of 1,3-diphenylallyl carbanion","authors":"Sucha S. Parmar,&nbsp;Brian Brocklehurst,&nbsp;Ronald N. Young","doi":"10.1016/0047-2670(87)87050-8","DOIUrl":"10.1016/0047-2670(87)87050-8","url":null,"abstract":"<div><p>The fluorescence of 1,3-diphenylallyl lithium (DPALi<sup>+</sup>) in 2-methyltetrahydrofuran (MTHF) is due to the presence of the loose ion pair having the trans,trans conformation: no fluorescence from the cis,trans conformer could be detected. Conformational photoisomerization accompanies fluorescence. The lifetime and the quantum yield of fluorescence increase with decreasing temperature and reach limiting values by about −100 °C. A mechanism in which the excited state is deactivated by fluorescence and non-radiative decay in competition with activated twisting about the allylic skeleton is proposed and shown to be compatible with the observed temperature dependences. Alternative mechanisms involving the corresponding allylic radical are discussed.</p></div>","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 121-124"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87050-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91314111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Simple relation between Arrhenius activation parameters for non-radiative processes from proton-transferred forms of intramolecularly hydrogen-bonded molecules 分子内氢键分子质子转移形式非辐射过程中Arrhenius活化参数的简单关系
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87054-5
Shin-Ichi Nagaoka
{"title":"Simple relation between Arrhenius activation parameters for non-radiative processes from proton-transferred forms of intramolecularly hydrogen-bonded molecules","authors":"Shin-Ichi Nagaoka","doi":"10.1016/0047-2670(87)87054-5","DOIUrl":"https://doi.org/10.1016/0047-2670(87)87054-5","url":null,"abstract":"","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 185-188"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87054-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91693145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Organic Photochemistry 有机光化学
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87056-9
John Coyle
{"title":"Organic Photochemistry","authors":"John Coyle","doi":"10.1016/0047-2670(87)87056-9","DOIUrl":"https://doi.org/10.1016/0047-2670(87)87056-9","url":null,"abstract":"","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 190-191"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87056-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91693144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The wavelength dependence of the photo-oxidation of CH2O CH2O光氧化的波长依赖性
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87041-7
Jayant Desai, Julian Heicklen
{"title":"The wavelength dependence of the photo-oxidation of CH2O","authors":"Jayant Desai,&nbsp;Julian Heicklen","doi":"10.1016/0047-2670(87)87041-7","DOIUrl":"10.1016/0047-2670(87)87041-7","url":null,"abstract":"<div><p>The photo-oxidation of CH<sub>2</sub>O in excess O<sub>2</sub> was studied at 253.7, 280.3, 312.8 and 326.1 nm at 25 °C. At all wavelengths except 253.7 nm, Φ(CO) = 1.0. At 253.7 nm, Φ(CO) = 0.77. The molecular photodecomposition is given by Φ(H<sub>2</sub>), which is 0.28, 0.28, 0.16 and 0.40 respectively at the four wavelengths.</p></div>","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 23-29"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87041-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76122673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effectiveness of the scavenging action of NO in vacuum UV photolyses of C2H5Br: 121.6 - 193.1 nm region 真空紫外光解C2H5Br 121.6 ~ 193.1 nm区域NO清除效果的研究
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87040-5
Kyung-Hoon Jung, D.K. Oh, K.W. Lee, Y.S. Choi, E. Tschuikow-Roux
{"title":"Effectiveness of the scavenging action of NO in vacuum UV photolyses of C2H5Br: 121.6 - 193.1 nm region","authors":"Kyung-Hoon Jung,&nbsp;D.K. Oh,&nbsp;K.W. Lee,&nbsp;Y.S. Choi,&nbsp;E. Tschuikow-Roux","doi":"10.1016/0047-2670(87)87040-5","DOIUrl":"https://doi.org/10.1016/0047-2670(87)87040-5","url":null,"abstract":"<div><p>The radical scavenging effect of NO, in the system of C<sub>2</sub>H<sub>5</sub>Br photolyses in the vacuum UV region, has been studied as a function of the energy content of C<sub>2</sub>H<sub>5</sub> radicals and of the irradiation time.</p><p>C<sub>2</sub>H<sub>6</sub>, one of the principal reaction products, from the primary radical process in the system can be completely suppressed by adding the appropriate amount of a radical scavenger, <em>e.g.</em> NO at greater than 0.1 Torr. However, by adding an unsuitable amount of NO, <em>e.g.</em> 0.02 Torr of NO and 50 Torr of C<sub>2</sub>H<sub>5</sub>Br, the reaction between the C<sub>2</sub>H<sub>5</sub> radical and NO becomes competitive with that of the C<sub>2</sub>H<sub>5</sub> radical and C<sub>2</sub>H<sub>5</sub>Br by the following mechanism: <figure><img></figure> where R represents the C<sub>2</sub>H<sub>5</sub> or C<sub>2</sub>H<sub>4</sub>Br radical.</p><p>The competitive reaction ratio between the C<sub>2</sub>H<sub>5</sub>Br/C<sub>2</sub>H<sub>5</sub> and NO/C<sub>2</sub>H<sub>5</sub> systems was obtained as a function of the irradiation energies with the variation in irradiation time by observing the production of C<sub>2</sub>H<sub>6</sub>. The values of <em>k</em><sub>NO</sub><sup>I</sup>/<em>k</em><sub>1</sub>, deduced by comparing the observed and the theoretical values, were found to be 4.0 × 10<sup>3</sup> at 121.6 nm, 9.5 × 10<sup>3</sup> at 147 nm, 14.0 × 10<sup>3</sup> at 163.3 nm, 17.0 × 10<sup>3</sup> at 174.3 – 174.5 nm and 23.0 × 10<sup>3</sup> at 193.1 nm.</p></div>","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 9-22"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87040-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90019239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Light and Life Process 光与生命过程
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87055-7
R.P. Wayne
{"title":"Light and Life Process","authors":"R.P. Wayne","doi":"10.1016/0047-2670(87)87055-7","DOIUrl":"https://doi.org/10.1016/0047-2670(87)87055-7","url":null,"abstract":"","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 189-190"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87055-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91693146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The fluorescence and phosphorescence spectra of dimethylphenol at 77 K 二甲基苯酚在77 K时的荧光光谱和磷光光谱
Journal of Photochemistry Pub Date : 1987-09-01 Epub Date: 2002-01-30 DOI: 10.1016/0047-2670(87)87044-2
F. Tomas Vert, P. Medina Casamayor, A. Olba Torrent, I.S. Monzo Mansanet
{"title":"The fluorescence and phosphorescence spectra of dimethylphenol at 77 K","authors":"F. Tomas Vert,&nbsp;P. Medina Casamayor,&nbsp;A. Olba Torrent,&nbsp;I.S. Monzo Mansanet","doi":"10.1016/0047-2670(87)87044-2","DOIUrl":"10.1016/0047-2670(87)87044-2","url":null,"abstract":"<div><p>The fluorescence and phosphorescence spectra of the dimethylphenols were studied at 77 K. Changes in the p<em>K</em><sub>a</sub> values in the excited singlet (S<sub>1</sub>) and triplet (T<sub>1</sub>) states for 2,3-, 2,4-, 2,5-, 2,6-, 3,4- and 3,5-dimethylphenol in ethanol and ethanol—NaOH solutions were estimated by means of the Förster cycle.</p><p>We found that the acidity of the hydroxyl group in the first excited singlet is greater than that in the ground state. This is also true for the first triplet state, although the acidity of the first triplet state of 2,6-dimethylphenol is an exception, owing to the influence of the methyl groups on the hydroxyl group.</p></div>","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 59-65"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87044-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85797604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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