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Einladung zur 98. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie e.V. vom 13. bis 15. Mai 1999 in Dortmund 98号派对德国国立物理化学协会到15 .1999年5月在多特蒙德
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199800023
{"title":"Einladung zur 98. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie e.V. vom 13. bis 15. Mai 1999 in Dortmund","authors":"","doi":"10.1002/bbpc.199800023","DOIUrl":"https://doi.org/10.1002/bbpc.199800023","url":null,"abstract":"","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"102 10","pages":"1514-1518"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199800023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137701421","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
Study of Sodium Colloids in Heavily Irradiated NaCl Crystals by Nuclear Magnetic Resonance 重辐照NaCl晶体中钠胶体的核磁共振研究
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199700040
O. Kanert, C. Schmidt, R. Küchler, H.W. Den Hartog
{"title":"Study of Sodium Colloids in Heavily Irradiated NaCl Crystals by Nuclear Magnetic Resonance","authors":"O. Kanert,&nbsp;C. Schmidt,&nbsp;R. Küchler,&nbsp;H.W. Den Hartog","doi":"10.1002/bbpc.199700040","DOIUrl":"10.1002/bbpc.199700040","url":null,"abstract":"<p>Strong irradiation of NaCl crystals results in a formation of sodium colloids which exhibit metallic properties. In consequence, besides the <sup>23</sup>Na line of NaCl a second well-separated <sup>23</sup>Na line occurs in the NMR spectrum caused by the Knight shift of the conduction electrons. We present Knight shift and nuclear spin relaxation measurements performed on the “metallic” <sup>23</sup>Na line in e<sup>–</sup>-irradiated NaCl single-crystals between about 4 and 390 K. Evaluation of the data leads to detailed information on the electronic properties, atomic self-diffusion, and melting behavior of the colloids. The results are discussed in view of corresponding data obtained in bulk sodium.</p>","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"101 9","pages":"1286-1290"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199700040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109880474","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
Pairing between Radioactive Solutes and Point-Defects in Semiconductors 半导体中放射性溶质与点缺陷的配对
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199700038
Thomas Wichert
{"title":"Pairing between Radioactive Solutes and Point-Defects in Semiconductors","authors":"Thomas Wichert","doi":"10.1002/bbpc.199700038","DOIUrl":"10.1002/bbpc.199700038","url":null,"abstract":"<p>The study of solute point-defect interactions in crystals is performed on an atomic scale by employing radioactive solutes as local observers. Thereby, the presence of a point-defect next to the solute atom becomes observable via the altered electronic charge distribution about the solute, giving rise to a defect-specific electric field gradient. Using the perturbed γγ angular correlation technique, this electric field gradient is detected via the hyperfine interaction occurring at the site of the nucleus of the radioactive atom. The sensitivity to solute point-defect pairs is typically in the order of 10<sup>16</sup>cm<sup>–3</sup>. Several properties of these pairs, such as their chemical nature and thermodynamical behaviour are discussed. The point-defects addressed in this paper are intrinsic, such as lattice vacancies, and extrinsic, such as substitutional and interstitial impurity atoms. Results for the elemental semiconductor Si and different II-VI compound semiconductors will be discussed.</p>","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"101 9","pages":"1274-1281"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199700038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"97401730","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
Polymer-Surfactant Interactions: Non Ionic Polymers with SDS and DTABr 聚合物-表面活性剂的相互作用:非离子聚合物与SDS和DTABr
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199800014
Camillo La Mesa, Livio Persi, Alessandro D'Aprano
{"title":"Polymer-Surfactant Interactions: Non Ionic Polymers with SDS and DTABr","authors":"Camillo La Mesa,&nbsp;Livio Persi,&nbsp;Alessandro D'Aprano","doi":"10.1002/bbpc.199800014","DOIUrl":"10.1002/bbpc.199800014","url":null,"abstract":"<p>Polymer-surfactant interactions in water-SDS-polyvinylpyrrolidone (PVP), water-SDS-polyoxyethylenglycol (PEO), water-(DTABr)-(PEO) and in water-SDS-polyoxypropylenglycol (PPO), systems have been investigated by ultrasonic relaxation, adiabatic compressibility and viscosity measurements.</p><p>Both the hydrodynamic and thermodynamic properties show significant changes at the critical association concentration in presence of polymer. As to the kinetic behaviour, investigation on systems containing PEO or PVP indicates the occurrence of a region where relaxation times are nearly constant. For the low molecular weight PPO polymer this effect has not been observed. Such differences have been ascribed to the minimum polymer chain length effect, required for the binding of surfactant aggregates on the polymer backbone. The dynamics of polymer-surfactant interactions has been discussed in terms of a kinetic model, previously proposed.</p>","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"102 10","pages":"1459-1466"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199800014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"96035949","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: 7
Investigation of the Pyrolysis and Crystallization of Lead Zirconate Titanate Ceramics Prepared via the Sol Gel Process 溶胶-凝胶法制备锆钛酸铅陶瓷的热解结晶研究
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199800006
Jens Brieger, Rotraut Merkle, Helmut Bertagnolli, Klaus Müller
{"title":"Investigation of the Pyrolysis and Crystallization of Lead Zirconate Titanate Ceramics Prepared via the Sol Gel Process","authors":"Jens Brieger,&nbsp;Rotraut Merkle,&nbsp;Helmut Bertagnolli,&nbsp;Klaus Müller","doi":"10.1002/bbpc.199800006","DOIUrl":"10.1002/bbpc.199800006","url":null,"abstract":"<p>The sol gel process for the preparation of lead zirconate, lead titanate and lead zirconate titanate is studied by various experimental techniques, comprising solid state NMR methods, FT IR spectroscopy, DTA/TG and XRD. Two temperature ranges are examined that cover (i) the pyrolysis step from the solid gel to the amorphous oxide mixture and (ii) the calcination step from the amorphous state to the crystalline ceramics. <sup>13</sup>C NMR and FT IR spectroscopy studies primarily are used to monitor the structural changes during the pyrolysis step. <sup>207</sup>Pb NMR spectroscopy is employed to examine the development of the short range order at the lead nuclei over the whole temperature range. The latter studies clearly show that the observed changes in the short range order are accompanied by alterations in the long range order, as derived from the XRD data. In addition, <sup>207</sup>Pb NMR experiments are performed on ceramic samples that were obtained via the sol gel or the mixed oxide route. It is demonstrated that these samples exhibit significant differences in the short range order, although the long range order was found to be the same, being independent of the actual preparation route.</p>","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"102 10","pages":"1376-1386"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199800006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"95594534","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
G. Lagaly, O. Schulz und R. Zimehl: Dispersionen und Emulsionen, ca. 420 Seiten, 243 Abb., Steinkopff, Darmstadt, ISBN 3-7985-1087-3, DM 78,00 l . Lagaly, o。舒尔茨和R. zi面粉:分散和乳清，大约420页，图三
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199800024
W. Ulbricht
{"title":"G. Lagaly, O. Schulz und R. Zimehl: Dispersionen und Emulsionen, ca. 420 Seiten, 243 Abb., Steinkopff, Darmstadt, ISBN 3-7985-1087-3, DM 78,00","authors":"W. Ulbricht","doi":"10.1002/bbpc.199800024","DOIUrl":"10.1002/bbpc.199800024","url":null,"abstract":"","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"102 10","pages":"1519-1520"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199800024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"93821831","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
Rate Constants of the Reactions of CHCl (X̃1A′) with Ethylene, Propylene, and Acetylene CHCl (X′1A′)与乙烯、丙烯和乙炔反应的速率常数
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199700003
H.-H. Carstensen, C Rehbein, H. Gg. Wagner
{"title":"Rate Constants of the Reactions of CHCl (X̃1A′) with Ethylene, Propylene, and Acetylene","authors":"H.-H. Carstensen,&nbsp;C Rehbein,&nbsp;H. Gg. Wagner","doi":"10.1002/bbpc.199700003","DOIUrl":"10.1002/bbpc.199700003","url":null,"abstract":"The rate constants of the reactions of CHCl (X 1 A') with C 2 H 2 (k 4 ), C 2 H 4 (k 5 ) and C 3 H 6 (k 6 ) were measured as a function of temperature. Experiments were carried out under quasistationary conditions at around 18.5 mbar total pressure. It is shown that excimer laser photolysis of CF 2 =CHCl at γ pH = 193 nm is a suitable source for CHCl (X 1 A') generation. The following rate constants were obtained from logarithm plots: k 4 = (4.2 ±0.1). 10 2 (T/295 K) -(0.79±0.06) cm 3 mol -1 s -1 k 5 = (3.2±0.2).10 12 (T/295 K) -(l.52±0.12) cm 3 mol -1 s -1 k 6 = (8.3±1.4).10 12 (T/295 K) -(1.39±0.05) cm 3 mol -1 s -1 The reactivity of CHCl (X 1 A') is compared to those of other carbenes.","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"101 10","pages":"1429-1432"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199700003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"112140518","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
On the Interaction of Paramagnetic Point Defects in Heavy Metal Fluoride Glasses 重金属氟化玻璃中顺磁点缺陷的相互作用研究
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199700041
G. Scholz, R. Stösser, T. Grande, S. Aasland
{"title":"On the Interaction of Paramagnetic Point Defects in Heavy Metal Fluoride Glasses","authors":"G. Scholz,&nbsp;R. Stösser,&nbsp;T. Grande,&nbsp;S. Aasland","doi":"10.1002/bbpc.199700041","DOIUrl":"10.1002/bbpc.199700041","url":null,"abstract":"<p>The origin and nature of ESR signals of fluoride glasses (ZBLAN: ZrF<sub>4</sub>/BaF<sub>2</sub>/LaF<sub>3</sub>/AlF<sub>3</sub>/NaF) doped both with Fe<sup>3+</sup> and Fe<sup>2+</sup> ions was studied using the temperature and microwave power (<i>P</i><sub>MW</sub>) dependencies as well as a complete simulation of the X-band ESR spectra. For the first time, evidence is given for the existence of {Fe<sup>II</sup>-OH-Fe<sup>III</sup>} units (<i>S</i>' = 9/2) formed in the glasses involving traces of O<sub>2</sub> and H<sub>2</sub>O present in the samples. Fluoride glassy matrices constrain the formation of interacting species and therefore nonuniform spatial distributions of the dopants. Reasons are seen (i) in the local structural chemistry (geometrical and charge compensation reasons), and (ii) in the melting and post-melting processes.</p>","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"101 9","pages":"1291-1296"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199700041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"102742556","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
FRIEDEMANN SCHNEIDER 弗里德曼-施奈德
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199800022
Peter Schuster
{"title":"FRIEDEMANN SCHNEIDER","authors":"Peter Schuster","doi":"10.1002/bbpc.199800022","DOIUrl":"https://doi.org/10.1002/bbpc.199800022","url":null,"abstract":"","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"102 10","pages":"1512-1513"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199800022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137701419","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
Electron-Energy-Loss Spectroscopy of Spin-Forbidden Transitions with Vibronic Resolution: The Lowest Triplet State of Fluorobenzenes 具有振动分辨率的自旋禁止跃迁的电子能量损失光谱:氟苯的最低三重态
Berichte der Bunsengesellschaft für physikalische Chemie Pub Date : 2014-03-18 DOI: 10.1002/bbpc.199700015
P. Swiderek, S. Schürfeld, H. Winterling
{"title":"Electron-Energy-Loss Spectroscopy of Spin-Forbidden Transitions with Vibronic Resolution: The Lowest Triplet State of Fluorobenzenes","authors":"P. Swiderek,&nbsp;S. Schürfeld,&nbsp;H. Winterling","doi":"10.1002/bbpc.199700015","DOIUrl":"10.1002/bbpc.199700015","url":null,"abstract":"<p>Low-energy electron-energy-loss spectra in the range of the lowest triplet state are presented for solid benzene, fluorobenzene, and p-difluorobenzene deposited at a temperature of 30 K. Vibronic structure within the triplet bands of fluorobenzene and p-difluorobenzene is observed for the first time. The spectrum of fluorobenzene closely resembles that of benzene, whereas p-difluorobenzene shows characteristic differences. The spectra of all three molecules are dominated by pure progressions of the totally symmetric ring-breathing vibrational mode <i>v</i><sub>1</sub>. In addition, less intense transitions to vibronic levels relating to the e<sub>2g</sub> modes in benzene are observed and their assignment is given. The occurrence of e<sub>2g</sub> modes in all three spectra underlines that the vibronic coupling pathways between the lowest and the second triplet state are similar in benzene and its derivatives. In p-difluorobenzene a splitting of the extremely low frequency mode that relates to the <i>v</i><sub>8</sub> (e<sub>2g</sub>) vibration in benzene is observed. This is in agreement with theoretical predictions of an asymmetric shape of the lowest triplet potential energy surface along a symmetry coordinate relating to <i>v</i><sub>8</sub> in substituted benzenes.</p>","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"101 10","pages":"1517-1526"},"PeriodicalIF":0.0,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199700015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"105734101","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
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