Some of the history of the physical chemistry of the adsorption of vapors is reviewed. The subject divides itself into three parts, each with its characteristic approach and important contributors: the multilayer region, the monolayer region and the submonolayer region. Special reference is made to the last topic as one in which the writer and Sydney Ross have overlapped in the matter of the determination of site energy distributions. Ross's contributions are noted. An important and difficult question is whether the various energy adsorption sites are distributed more or less randomly or as nearly uniform patches. An approach to the answer may be through the use of adsorbates of varying size. The role of geometric irregularity is discussed briefly, in terms of self-similar surfaces having a fractal dimension. Finally, an additional complication occurs in the case of adsorption from solution involving large raft-like molecules, where the adsorption may be irreversible, generating a paradox.

Some of the early quantitative history of inorganic photochemistry is recalled and some of the early experiences of the writer. Conceptual landmarks in the progress to the present are outlined. The role of the Italian school of photochemistry in this development is noted. The current state of the field is discussed briefly along with some predictions.

Some of the early quantitative history of inorganic photochemistry is recalled and some of the early experiences of the writer. Conceptual landmarks in the progress to the present are outlined. The role of the Italian school of photochemistry in this development is noted. The current state of the field is discussed briefly along with some predictions.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysical studies of tungsten carbonyl W(CO)5L complexes. Multiple-state luminescence of W(CO)5(4-cyanopyridine) in fluid and glassy solutionsKathleen A. Rawlins, Alistair J. Lees, and Arthur W. AdamsonCite this: Inorg. Chem. 1990, 29, 19, 3866–3871Publication Date (Print):September 1, 1990Publication History Published online1 May 2002Published inissue 1 September 1990https://pubs.acs.org/doi/10.1021/ic00344a042https://doi.org/10.1021/ic00344a042research-articleACS PublicationsRequest reuse permissionsArticle Views130Altmetric-Citations19LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

A number of examples of chemiluminescent, CL, redox reactions are now known, for which the emission comes from an excited state coordination compound. The best known case is that of the reduction of \({\text{R}\text{u}\text{L}_3}^{3+}\), L= 2,2’-bipyridine, by various reductants, with emission from the lowest charge transfer excited state of the product, \([{\text{R}\text{u}\text{L}_3}^{3+}]^*\) (Lytle, 1971; Gafney 1975; Martin 1972; Vogler 1981; Bolletta 1981, 1982; El-Sayed 1987). As other examples, emission from the doublet thexi state of \({\text{C}\text{r}\text{L}_3}^{3+}\) has been observed on oxidation of \({\text{C}\text{r}\text{L}_3}^{2+}\) by \({\text{R}\text{u}\text{L}_3}^{3+}\) (Vogler 1981) as well as the CL oxidation of \({\text{M}\text{o}_6\text{C}\text{l}_{14}}^{3-}\) or reduction of \({\text{M}\text{o}_6\text{C}\text{l}_{14}}^-\) (El-Sayed 1987). Also, a pair of reactant species may be generated electrochemically, to give an emitting excited state product on back reaction (Bolletta 1982; Nocera 1984; Luong 1978, Rubinstein 1981). The typical CL reaction is fast however, and detailed kinetic studies are rare.

A number of new chemiluminescent reactions are reported. These include the reaction of Mo6Cl141- and Mo6Cl143- with solvent acetonitrile, of the latter species with Ru(bipyr)33+ (bipyr=2,2′-bipyridine) and of Ru(bipyr)3+ and Ru(bipyr)33+ with solvent acetonitrile and with various oxidants and reductants. Approximate chemiluminescence yields and kinetics are also reported for the reduction of acidic aqueous solutions of Ru(bipyr)33+ by luminol, SnCl2, SO32-, H2O2, ethylenediaminetetracetic acid, N3-, ethanol, Pt(CN)42-, Fe(CN)64- and W(CN)84-.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA laser-produced plasma as a pulsed source of continuum infrared radiation for time-resolved absorption spectroscopyArthur W. Adamson and Marc C. CimolinoCite this: J. Phys. Chem. 1984, 88, 3, 488–490Publication Date (Print):February 1, 1984Publication History Published online1 May 2002Published inissue 1 February 1984https://pubs.acs.org/doi/10.1021/j150647a033https://doi.org/10.1021/j150647a033research-articleACS PublicationsRequest reuse permissionsArticle Views72Altmetric-Citations17LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

Durch Zugabe einer heißen konz. NaCN‐ Lösung zum bekannten Cr(LH)H 2 O wird der Komplex (I) erhalten, in dem der EDTA‐ Ligand dreizähnig gebunden vorliegt; drei Carboxylgruppen sind nicht koordiniert.

ADVERTISEMENT RETURN TO ISSUEPREVReportNEXTProperties of excited statesArthur W. Adamson Cite this: J. Chem. Educ. 1983, 60, 10, 797Publication Date (Print):October 1, 1983Publication History Received3 August 2009Published online1 October 1983Published inissue 1 October 1983https://doi.org/10.1021/ed060p797RIGHTS & PERMISSIONSArticle Views812Altmetric-Citations38LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (5 MB) Get e-Alerts Get e-Alerts

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, kinetics, and photochemistry of the chromium(III) dicyanoaquaethylenediaminetetraacetate complexZhong Chen, Marc Cimolino, and Arthur W. AdamsonCite this: Inorg. Chem. 1983, 22, 21, 3035–3040Publication Date (Print):October 1, 1983Publication History Published online1 May 2002Published inissue 1 October 1983https://pubs.acs.org/doi/10.1021/ic00163a011https://doi.org/10.1021/ic00163a011research-articleACS PublicationsRequest reuse permissionsArticle Views52Altmetric-Citations5LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Emission lifetimes for Rh(NH3)5Cl2+, A, and Rh(NH3)5Br2+, B, are 30.1 ± 0.7 nsec and 24.1 ± 1.2 nsec in aqueous acidified solution at 5 °C, respectively, with corresponding apparent activation energies of 5.1 and 5.4 kcal mol−1, again respectively. In both cases the emission maximum is at about 14 kK. There is excited absorption, which decays with the corresponding emission lifetime, with maxima at 490 nm and 620 nm, for A and B respectively. This second excited state is also photoreactive. The emissions are quenched by hydroxide ion, the bimolecular quenching rate constants being 2.1 × 1010 M−1 sec−1 and 2.7 × 1010 M−1 sec−1 at 5 °C, again respectively. Studies with A showed that the other bases such as carbonate and cyanide ions also quench. A undergoes only chloride photoaquation, which is 87% quenched on quenching emission. B is known to show both bromide and ammonia photoaquation; the latter is fully quenched on quenching emission, while the former reaction mode is unaffected. Possible excited state schemes are discussed, one including a reactive quintet state.