Spectrochimica Acta最新文献

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Solvent effects on Raman and infra-red intensities in the “continuous dielectric” model “连续介质”模型中溶剂对拉曼和红外强度的影响
Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80177-7
P. Mirone
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引用次数: 39
Thermodynamic constants of ionization processes by spectrophotometric methods: Meta-halogenophenols 用分光光度法测定电离过程的热力学常数:间卤代酚
Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80169-8
P.D. Bolton, F.M. Hall, I.H. Reece
{"title":"Thermodynamic constants of ionization processes by spectrophotometric methods: Meta-halogenophenols","authors":"P.D. Bolton,&nbsp;F.M. Hall,&nbsp;I.H. Reece","doi":"10.1016/0371-1951(66)80169-8","DOIUrl":"10.1016/0371-1951(66)80169-8","url":null,"abstract":"<div><p>Thermodynamic ionization constants over the temperature range 10–60° together with values for the standard free energy, enthalpy and entropy of ionization of <em>m</em>-chlorophenol, <em>m</em>-bromophenol and <em>m</em>-iodophenol are reported. These results in conjunction with an extensive collection of similar results from the literature show that substituent effects in the ionization of phenols are due primarily to entropy changes possibly involving a change of solvation state. In contrast to the free energies of ionization the entropies are well correlated by σ<em><sup>n</sup></em> values.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 11","pages":"Pages 1825-1830"},"PeriodicalIF":0.0,"publicationDate":"1966-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80169-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76111924","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
Study of some mono-, di- and tricarboxylic acids in aqueous solution by the nuclear magnetic resonance technique 用核磁共振技术研究水溶液中的一羧酸、二羧酸和三羧酸
Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80182-0
A. Loewenstein, H. Gilboa
{"title":"Study of some mono-, di- and tricarboxylic acids in aqueous solution by the nuclear magnetic resonance technique","authors":"A. Loewenstein,&nbsp;H. Gilboa","doi":"10.1016/0371-1951(66)80182-0","DOIUrl":"10.1016/0371-1951(66)80182-0","url":null,"abstract":"<div><p>The nuclear magnetic resonance spectra of aqueous solutions of three β-hydroxy carboxylic acids and some of their derivatives were measured as a function of the pH. The chemical shifts of the methylene hydrogens, adjacent to the carboxyl group, exhibit titration curves. The chemical shift between the two methylene hydrogens behaves differently in each compound, the most common behaviour being the occurrence of a minimum in the shift at pH ⋍ pK. The value of the spin—spin coupling constant changes only very slightly with the pH. The effect of added neutral salts and the variation of the temperature were also investigated in some of the acids. Qualitative conclusions concerning inter- and intramolecular hydrogen bonds and electrostatic interactions in these molecules were derived from the results.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 11","pages":"Pages 1939-1947"},"PeriodicalIF":0.0,"publicationDate":"1966-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80182-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89910284","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
Method for the computation of approximate vibrational force constants 近似振动力常数的计算方法
Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80186-8
J. Herranz, F. Castaño
{"title":"Method for the computation of approximate vibrational force constants","authors":"J. Herranz,&nbsp;F. Castaño","doi":"10.1016/0371-1951(66)80186-8","DOIUrl":"https://doi.org/10.1016/0371-1951(66)80186-8","url":null,"abstract":"","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 11","pages":"Pages 1965-1967"},"PeriodicalIF":0.0,"publicationDate":"1966-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80186-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89989182","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: 34
The application of resonance lamps as monochromators in atomic absorption spectroscopy 共振灯作为单色器在原子吸收光谱中的应用
Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80171-6
J.V. Sullivan, A. Walsh
{"title":"The application of resonance lamps as monochromators in atomic absorption spectroscopy","authors":"J.V. Sullivan,&nbsp;A. Walsh","doi":"10.1016/0371-1951(66)80171-6","DOIUrl":"10.1016/0371-1951(66)80171-6","url":null,"abstract":"<div><p>Since the spectrum of the resonance radiation from an atomic vapour consists only of those spectral lines which are absorbed by the vapour, resonance lamps can serve as monochromators for isolating those lines whose intensities are measured in atomic absorption spectrophotometry. Resonance lamps in which the atomic vapour is produced by indirect electrical heating of the appropriate metal in a rare gas at reduced pressure are suitable as monochromators for use in the determination by atomic absorption measurement of low-melting-point metals such as calcium, magnesium, sodium, potassium, thallium and lead. Similar techniques offer attractive possibilities for the construction of simple calorimeters for specific determinations.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 11","pages":"Pages 1843-1852"},"PeriodicalIF":0.0,"publicationDate":"1966-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80171-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74324346","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: 30
Far infra-red spectra and lattice vibrations of hexanitrocobalt (III) complex salts and ammine complex salts 六硝基钴(III)配合盐和胺配合盐的远红外光谱和晶格振动
Spectrochimica Acta Pub Date : 1966-10-01 DOI: 10.1016/0371-1951(66)80216-3
I. Nakagawa, T. Shimanouchi
{"title":"Far infra-red spectra and lattice vibrations of hexanitrocobalt (III) complex salts and ammine complex salts","authors":"I. Nakagawa,&nbsp;T. Shimanouchi","doi":"10.1016/0371-1951(66)80216-3","DOIUrl":"10.1016/0371-1951(66)80216-3","url":null,"abstract":"<div><p>Far infra-red spectra of the hexanitrocobalt (III) complex salts, M<sub>3</sub>[Co(No<sub>2</sub>)<sub>6</sub>] (M: Na, K, Rb and Cs), and the hexammine complex salts, [Co(NH<sub>3</sub>)<sub>6</sub>]X<sub>3</sub> (X: Cl, Br and I) and [Ni(NH<sub>3</sub>)<sub>6</sub>]Cl<sub>2</sub>, have been measured down to 25 cm<sup>−1</sup>. In addition to the intramolecular vibrations in the complex ion (the metal—ligand stretching and deformation vibrations associated with the co-ordination bond), the lattice vibrations due to the interaction between the complex ion and the outer ion have been observed in the region below 150 cm<sup>−1</sup>.</p><p>A normal co-ordinate analysis of the crystal as a whole has been performed and the interaction potential constants as well as the intramolecular potential constants have been obtained by using the observed frequencies for both of the lattice vibrations and the intramolecular vibrations. It has been found that the lattice frequencies may be explained by taking into consideration the interaction between the atoms or ions whose interatomic distances are shorter than 3·5 Å. It has been shown that some of the intramolecular potential constants should be somewhat modified by the introduction of the lattice vibrations, but the metal—ligand stretching force constant may be almost accurately obtained without considering the lattice modes.</p><p>Far infra-red spectra of the halogenoammine cobalt (III) complex salts have been also measured and several bands attributed to the lattice vibrations have been obtained.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 10","pages":"Pages 1707-1728"},"PeriodicalIF":0.0,"publicationDate":"1966-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80216-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80273982","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: 31
Determination of optical constants by ATR measurements 用ATR测量法测定光学常数
Spectrochimica Acta Pub Date : 1966-10-01 DOI: 10.1016/0371-1951(66)80226-6
T. Hirschfeld
{"title":"Determination of optical constants by ATR measurements","authors":"T. Hirschfeld","doi":"10.1016/0371-1951(66)80226-6","DOIUrl":"https://doi.org/10.1016/0371-1951(66)80226-6","url":null,"abstract":"","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 10","pages":"Pages 1823-1824"},"PeriodicalIF":0.0,"publicationDate":"1966-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80226-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91593877","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: 8
Enthalpies of intramolecular interactions in ferrocenyl alcohols 二茂铁醇分子内相互作用焓
Spectrochimica Acta Pub Date : 1966-10-01 DOI: 10.1016/0371-1951(66)80223-0
A.W. Baker, D.E. Bublitz
{"title":"Enthalpies of intramolecular interactions in ferrocenyl alcohols","authors":"A.W. Baker,&nbsp;D.E. Bublitz","doi":"10.1016/0371-1951(66)80223-0","DOIUrl":"https://doi.org/10.1016/0371-1951(66)80223-0","url":null,"abstract":"<div><p>The ν<sub>OH</sub> bands of a series of ferrocenyl alcohols and phenols have been studied as a function of temperature in carbon tetrachloride. From this, enthalpies have been calculated for the interaction of the hydroxyl group with both the ferrocenyl π-electrons and the <em>d</em>-orbitals of iron. The accessibility of the iron <em>d</em>-orbitals has been compared with those of the <em>d</em>-orbitals in the corresponding ruthenium and osmium compounds.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 10","pages":"Pages 1787-1799"},"PeriodicalIF":0.0,"publicationDate":"1966-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80223-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91760821","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: 34
I.R.-Spektren von [1,4—13C2]-Cyclohexandion-(1,4) und [1,4—13C2-Benzochinon-(1,4)
Spectrochimica Acta Pub Date : 1966-10-01 DOI: 10.1016/0371-1951(66)80225-4
D. Döpp, H. Musso
{"title":"I.R.-Spektren von [1,4—13C2]-Cyclohexandion-(1,4) und [1,4—13C2-Benzochinon-(1,4)","authors":"D. Döpp,&nbsp;H. Musso","doi":"10.1016/0371-1951(66)80225-4","DOIUrl":"10.1016/0371-1951(66)80225-4","url":null,"abstract":"<div><p>The shifts of the infra-red frequencies of [1.4—<sup>13</sup>C<sub>2</sub>]-cyclohexane-(1.4)dione and [1.4—<sup>13</sup>C<sub>2</sub>]-<em>p</em>-benzoquinone in the solid state, in solution, and in the vapour phase are discussed in relation to band assignments given in the literature.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 10","pages":"Pages 1813-1822"},"PeriodicalIF":0.0,"publicationDate":"1966-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80225-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83655431","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: 8
Infrared intensities of CCl stretching vibrations in cis- and trans-4-t-butylcyclohexyl chloride CCl在顺式和反式4-t-丁基环己基氯中伸缩振动的红外强度
Spectrochimica Acta Pub Date : 1966-10-01 DOI: 10.1016/0371-1951(66)80217-5
J.R. Hall , M.Kent Wilson
{"title":"Infrared intensities of CCl stretching vibrations in cis- and trans-4-t-butylcyclohexyl chloride","authors":"J.R. Hall ,&nbsp;M.Kent Wilson","doi":"10.1016/0371-1951(66)80217-5","DOIUrl":"10.1016/0371-1951(66)80217-5","url":null,"abstract":"<div><p>Infrared intensity measurements of <em>cis</em> and <em>trans</em> isomers of 4-<em>t</em>-butylcyclohexyl chloride in CS<sub>2</sub> solution show that the apparent molecular extinction coefficient for the equatorial CCl stretching vibration is 60 percent greater than the value for the axial CCl stretching vibration. The integrated absorption intensity is 47 percent greater for the <em>trans</em> isomer. Dilute solutions of the individual isomers conformed to Beer's Law. No solute—solute interaction was observed for solutions of isomeric mixtures.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 10","pages":"Pages 1729-1732"},"PeriodicalIF":0.0,"publicationDate":"1966-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80217-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87555101","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: 11
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