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Spectroscopy and Dynamics of Benzonitrile-Enzene Complexes in A Supersonic Free-Jet 超声速自由射流中苯腈-酶配合物的光谱与动力学
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/1989/65147
F. Lahmani, C. Lardeux‐Dedonder, A. Zehnacker
{"title":"Spectroscopy and Dynamics of Benzonitrile-Enzene Complexes in A Supersonic Free-Jet","authors":"F. Lahmani, C. Lardeux‐Dedonder, A. Zehnacker","doi":"10.1155/1989/65147","DOIUrl":"https://doi.org/10.1155/1989/65147","url":null,"abstract":"Excitation and fluorescence spectra of benzonitrile-benzene and toluene complexes seeded in helium and \u0000expanded in a supersonic free jet reveals two types of transition attributed to the coexistence of two \u0000isomeric forms. One consists of narrow bands in both excitation and emission and is characteristic of \u0000wealdy perturbed van tier Waals complexes. The other involves broadened absorption and gives rise to an \u0000exciplex type emission.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123432042","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: 17
THE PHOSPHORESCENCE SPECTRA OF TRIPHENYLENE AND TRUXENE: A COMBINED EXPERIMENTAL AND THEORETICAL INVESTIGATION OF THE VIBRONIC STRUCTURE 三苯和truxene的磷光光谱:振动结构的实验和理论结合研究
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/1999/25873
D. Baunsgaard, M. E. Balsami, J. Frederiksen, N. Harrit, F. Negri, G. Orlandi, R. Wilbrandt
{"title":"THE PHOSPHORESCENCE SPECTRA OF TRIPHENYLENE AND TRUXENE: A COMBINED EXPERIMENTAL AND THEORETICAL INVESTIGATION OF THE VIBRONIC STRUCTURE","authors":"D. Baunsgaard, M. E. Balsami, J. Frederiksen, N. Harrit, F. Negri, G. Orlandi, R. Wilbrandt","doi":"10.1155/1999/25873","DOIUrl":"https://doi.org/10.1155/1999/25873","url":null,"abstract":"The phosphorescence spectra of triphenylene and truxene, recorded in glassy solvents at 77 K, are presented. Their vibronic structure is interpreted on the basis of intensities computed with the help of quantum-chemical calculations. The agreement between observed and simulated intensities is very satisfactory and contributes to improve and complete the assignment of ground state frequencies of the two disk-like molecules.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121885777","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
The Reaction of Spin–Orbit State-Selected Ca(PJ03) With CH3I, CH2I2, and SF6 自旋轨道选态Ca(PJ03)与CH3I、CH2I2和SF6的反应
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/LC.6.391
M. L. Campbell, N. Furio, P. Dagdigian
{"title":"The Reaction of Spin–Orbit State-Selected Ca(PJ03) With CH3I, CH2I2, and SF6","authors":"M. L. Campbell, N. Furio, P. Dagdigian","doi":"10.1155/LC.6.391","DOIUrl":"https://doi.org/10.1155/LC.6.391","url":null,"abstract":"Chemiluminescence cross sections for reaction of the individual spin–orbit states of metastable Ca(PJ03) with CH3I, CH2I2, and SF6 have been determined by the use of optical pumping state selection. This technique was also used to separate the chemiluminescence arising from the two excited metastable Ca 3P0 and 1D states. The spin–orbit dependence of the chemiluminescence pathway was found to be substantial for the CH3I and CH2I2 reactions and similar to that previously observed for halogen diatom and alkyl bromide reagents. By contrast, no spin–orbit effect was observed for Ca(3P0)","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122064373","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: 19
Transient Resonance RamanStudies of Ru(II) Complexes in DNAand in Homogeneous Media Ru(II)配合物在dna和均质介质中的瞬态共振拉曼研究
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/1999/74587
Colin G. Coates, J. McGarvey, S. Bell, L. Jacquet, J. Kelly, T. Keyes, J. Vos
{"title":"Transient Resonance RamanStudies of Ru(II) Complexes in DNAand in Homogeneous Media","authors":"Colin G. Coates, J. McGarvey, S. Bell, L. Jacquet, J. Kelly, T. Keyes, J. Vos","doi":"10.1155/1999/74587","DOIUrl":"https://doi.org/10.1155/1999/74587","url":null,"abstract":"Transient resonance Raman (TR2) spectroscopy has been used to investigate the metalligand charge-transfer (MLCT) excited states of Ru(II) polypyridyl complexes inDNAand in homogeneous solution. In DNA, complexes of the type [Ru(L)2(L′)]2","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122177329","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
Picosecond Laser Chemistry in Supersonic Jet Beams 超音速喷射光束中的皮秒激光化学
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/LC.2.55
A. Zewail
{"title":"Picosecond Laser Chemistry in Supersonic Jet Beams","authors":"A. Zewail","doi":"10.1155/LC.2.55","DOIUrl":"https://doi.org/10.1155/LC.2.55","url":null,"abstract":"In this review we describe the development and the applications of the picosecond-jet technique, which utilizes a picosecond laser and a supersonically-cold jet beam of large molecules. The applications include studies of coherence (quantum beats), photodissociation, isomerization, and partial solvation. The results emphasize the role of intramolecular energy redistribution, and provide evidence for intramolecular threshold effect for rates vs. excess molecular energy. Simple theory for this redistribution of energy among certain modes in molecules is given, and comparison with RRKM calculation is also made to assess the nature of the statistical behavior for the redistribution.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123920097","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: 9
USE OF LASERS IN PHOTOPHYSICAL RESEARCH OF PHOTOSYNTHESIS 激光在光合作用光物理研究中的应用
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/LC.6.219
G. Laczkó, P. Maróti, L. Szalay
{"title":"USE OF LASERS IN PHOTOPHYSICAL RESEARCH OF PHOTOSYNTHESIS","authors":"G. Laczkó, P. Maróti, L. Szalay","doi":"10.1155/LC.6.219","DOIUrl":"https://doi.org/10.1155/LC.6.219","url":null,"abstract":"During the past decade, extensive research has been carried out to utilize the unique characteristics of laser light. Mainly the high intensity, short pulse and small divergence of the laser beam have been made use of, and some of the results are briefly summarized here. The effect of the coherence of actinic light on the primary photochemical charge separation is discussed in some detail.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124057095","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
Photon Echoes Made Simple 光子回波变得简单
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/LC.2.3
R. Beach, B. Brody, S. Hartmann
{"title":"Photon Echoes Made Simple","authors":"R. Beach, B. Brody, S. Hartmann","doi":"10.1155/LC.2.3","DOIUrl":"https://doi.org/10.1155/LC.2.3","url":null,"abstract":"Photon Echoes in gases are analyzed via the Billiard Ball Echo Model both in the \u0000short and long pulse limit where the “atoms” are represented as spherical and elliptical \u0000billiard balls, respectively. Recent experiments demonstrating the elliptical billiard ball \u0000shape are presented using intensity data which ranges over close to eleven orders of \u0000magnitude.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126181151","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
Comparison of the photoisomerization and relaxation processes studied by time resolved spectroscopic methods in two polymethine dyes with the same polymethine chromophor 用时间分辨光谱方法比较了两种具有相同聚甲基色的聚甲基染料的光异构化和弛豫过程
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/LC.7.261
S. Rentsch, U. Grummt, D. Khetchinashwili
{"title":"Comparison of the photoisomerization and relaxation processes studied by time resolved spectroscopic methods in two polymethine dyes with the same polymethine chromophor","authors":"S. Rentsch, U. Grummt, D. Khetchinashwili","doi":"10.1155/LC.7.261","DOIUrl":"https://doi.org/10.1155/LC.7.261","url":null,"abstract":"A streptocyanine dye (BMC) and an oxadicarbocyanine (DODCI) were studied in the \u0000picosecond and millisecond time region. The comparison showed that for both dyes the \u0000following parameters are nearly equal: the radiative lifetime, the difference between the \u0000absorption maxima of the stable form and the photoisomer, the activation energy and \u0000the frequency factor for the thermal backreaction and even the energy barrier in the \u0000excited state.The dyes show strongly different kinetics in the excited state. BMC relaxes faster by \u0000about 2 orders of magnitude than DODCI and shows a much higher photoisomerization \u0000rate. In accordance with Eyring's theory the higher relaxation and isomerization rate of \u0000BMC is connected with an entropy increase in the transition state.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124609238","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: 10
The Structure, Function, and Assembly of the Light-Harvesting Antenna of Photosynthetic Purple Bacteria 光合紫色细菌捕光天线的结构、功能与组装
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/LC.6.307
R. Grondelle
{"title":"The Structure, Function, and Assembly of the Light-Harvesting Antenna of Photosynthetic Purple Bacteria","authors":"R. Grondelle","doi":"10.1155/LC.6.307","DOIUrl":"https://doi.org/10.1155/LC.6.307","url":null,"abstract":"","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124727557","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
INFRARED SPECTRAL HOLE BURNING OF 1:1 HYDROGEN-BONDED COMPLEXES IN SOLUTION* 溶液中1:1氢键配合物的红外光谱空穴燃烧*
Laser Chemistry Pub Date : 1900-01-01 DOI: 10.1155/1999/80323
S. Arrivo, V. Kleiman, W. Grubbs, T. P. Dougherty, E. Heilweil
{"title":"INFRARED SPECTRAL HOLE BURNING OF 1:1 HYDROGEN-BONDED COMPLEXES IN SOLUTION*","authors":"S. Arrivo, V. Kleiman, W. Grubbs, T. P. Dougherty, E. Heilweil","doi":"10.1155/1999/80323","DOIUrl":"https://doi.org/10.1155/1999/80323","url":null,"abstract":"Transient picosecond infrared (IR) spectra of the OH and NH-stretch (v=0–1) absorption bands of several hydrogen-bonded complexes have been investigated. Solutions of 1:1 complexes of weak acids (methanol, triethylsilanol and pyrrole, < 0.1 mol/dm3) and bases (acetonitrile, pyridine and tetrahydrofuran, < 2 mol/dm3) in CCl4 at 295 K were interrogated with IR excitation and broadband probing. Lorentzian-shaped absorption bands are uniformly bleached while those with near-Gaussian bandshapes produce transient spectral holes. These results indicate a base functionality and hydrogen-bond strength dependence for determining the broadening mechanisms of these absorptions.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129446680","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: 4
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