Comments on Inorganic Chemistry最新文献

{"title":"Can Solventless Reactions Sometimes Succeed When Solvent-Mediated Reactions Fail? A Second Case Study for Cu(I) and Ag(I) Complexes of Divergently Bridging Diimines without or with Fluorinated Azolates","authors":"Ruaa M. Almotawa, Christopher Hu, A. Cimino, V. Nesterov, M. Omary, Manal A. Rawashdeh-Omary","doi":"10.1080/02603594.2020.1770738","DOIUrl":"https://doi.org/10.1080/02603594.2020.1770738","url":null,"abstract":"ABSTRACT This paper provides the fifth manifestation of a new tradition by which the editors of Comments on Inorganic Chemistry wish to lead by example, whereby we start publishing original research content that, nonetheless, preserves the Journal’s identity as a niche for critical discussion of contemporary literature in inorganic chemistry (For the previous manifestations, see: Comments Inorg. Chem. 2018, 38, 1–35; 2019, 39, 1–26; 2019, 39, 188–215; 2020, 40, 1–24.) Herein, synthetic details, solid-state structures, and photophysical properties of a group of silver(I) and copper(I) complexes are described. Two silver-based coordination polymers have been obtained: {[3,5-(CF3)2Pz]2(bpp)Ag2}∞ (1) and {[3,5-(CF3)2Pz][5-(C6F5)Ttz](bpp)Ag}∞ (2) – constructed from bent 1,3-bis(4-pyridyl)propane (bpp), 3,5-bis(trifluoromethyl)pyrazole ([3,5-(CF3)2Pz]H) and 5-pentafluorophenyl-tetrazole ([5-(C6F5)Ttz]H) in order to inspect the influence of mixed ligands on the resulting silver-based coordination complexes. The structure of 1 shows a distorted trigonal planar geometry with both the bpp and [3,5-(CF3)2Pz] ligands binding to the silver atom. The silver in 2 shows an uncommon interaction with the three different ligands. Also, two different geometries including distorted tetrahedral and distorted trigonal were presented for two different silver atoms. An interesting result was obtained for the Cu(I) coordination polymer {[Cu(bpp)2][BF4]}∞ (3) which was successfully synthesized in a solventless reaction but not a solvent-mediated reaction, hence manifesting a “green” chemistry route. The structure of 3 shows an ideal tetrahedral geometry similar to that for the silver analogue, {[Ag(bpp)2][BF4]}∞ (3a), published previously, whereas herein we obtained the same product with the same crystal structure via a more facile conventional synthetic route. All four complexes show bpp ligand-centered green emissions at ambient and cryogenic temperatures. Finally, a commentary is added to contrast the solventless vs solvent-mediated reactions in both this investigation and a precedent thereof by the same corresponding author’s group (Inorg. Chem. 2018, 57, 9962–9976), whereby reactions proceeded successfully only via the solventless route through mechanical grinding herein and spontaneous sublimation by vapor diffusion from the solid-state of one reactant to another yet nonvolatile reactant in the literature precedent, respectively. Graphical Abstract","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"164 1","pages":"277 - 303"},"PeriodicalIF":5.4,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77301949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Hydrothermal Synthesis Parameters on the Formation of Sodium Bismuth Titanate","authors":"E. A. Reshetnikova, I. V. Lisnevskaya, Ekaterina A. Zalyubovskaya, V. Butova, A. Soldatov","doi":"10.1080/02603594.2020.1813728","DOIUrl":"https://doi.org/10.1080/02603594.2020.1813728","url":null,"abstract":"ABSTRACT We report the effect of various Bi:Ti ratios x:1 (x = 0.5–3) on the phase formation of sodium-bismuth titanate Na0.5Bi0.5TiO3 (NBT) during hydrothermal synthesis (230°С, 3 MPa, 96 h) from titanium oxide and bismuth hydroxide in 20 M NaOH solution. It was shown that single-phase ceramics with perovskite structure could be obtained at x = 0.5–0.9 using the hot-pressing technique (1025°С, 60 MPa, 1 h). At x = 1, hydrothermal synthesis results in single-phase samples, while, after sintering, the admixture of Na2Ti3O7 was detected. At x = 2 and 3, samples contained admixtures after hydrothermal synthesis. The x–value does not significantly affect the composition of perovskite-like products despite the excess of bismuth in the system. The chemical composition of the samples with x = 0.5–0.9 corresponds to the general formula Na0.60–0.69Bi0.40–0.31TiO2.9–2.81δ0.10–0.19 (where δ represents vacancies in oxygen sublattice). The Bi3+ content in the samples is underestimated due to the solubility of its hydroxide in a 20 M alkali solution. The properties of ceramics are not significantly affected by x values, and materials exhibit following average characteristics: electrical resistivity 1.3 × 109 Ohm∙cm, tanδ = 0.15, Кр = 0.1, d31 = 6.7 and d33 = 9.5 pC/N, g31 = 2.34 and g33 = 3 mV∙m/N.","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"19 1","pages":"314 - 326"},"PeriodicalIF":5.4,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82547092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent Advances in Nanocomposite Luminescent Metal-Organic Framework Sensors for Detecting Metal Ions","authors":"S. Kanan, Ahmed Malkawi","doi":"10.1080/02603594.2020.1805319","DOIUrl":"https://doi.org/10.1080/02603594.2020.1805319","url":null,"abstract":"ABSTRACT Metal-organic frameworks (MOFs) are of great interest to researchers in chemistry and material science due to their various chemical and physical properties, which include high surface area, augmented adsorption/desorption kinetics, biocompatibility, and functional tunability. The structurally diverse 1-D, 2-D, and 3-D metal-organic frameworks have found applications in chemical sensing and several other fields, such as energy applications, biomedicine, and catalysis. In this review article, we address recent research advances in the use of metal-organic-framework-based nanocomposite materials as luminescent sensors for detecting various metal ions in aqueous biological and environmental samples. Graphical Abstract","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"84 1","pages":"1 - 66"},"PeriodicalIF":5.4,"publicationDate":"2020-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73301112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Investigation of How Nitrogen Monoxide (NO) and Nitrogen Dioxide (NO2) Are Produced in Oxidations by Nitric Acid (HNO3)","authors":"A. Mousavi","doi":"10.1080/02603594.2020.1803296","DOIUrl":"https://doi.org/10.1080/02603594.2020.1803296","url":null,"abstract":"ABSTRACT In oxidations by nitric acid (HNO3), such as the dissolution of gold (Au) in aqua regia, mixtures of nitrogen monoxide (NO) and nitrogen dioxide (NO2) are produced. In this article, the exact processes through which these two nitrogen oxides are produced were discussed. It was shown that in the processes of dissolution in HNO3 or aqua regia, NO2 is never a direct product of oxidations by HNO3. It was also explained that in such processes, NO2 is always produced from HNO3 and NO reacting. Further, the effect of the concentration of HNO3 was discussed in light of thermodynamic calculations. Graphical Abstract","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"26 1","pages":"307 - 313"},"PeriodicalIF":5.4,"publicationDate":"2020-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81707049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in Organometallic Chemistry, Volume 71","authors":"B. Belete","doi":"10.1080/02603594.2020.1771702","DOIUrl":"https://doi.org/10.1080/02603594.2020.1771702","url":null,"abstract":"","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"11 1","pages":"1-3"},"PeriodicalIF":5.4,"publicationDate":"2020-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87488029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solid Acid Catalysts for Biodiesel Production","authors":"Tarun F. Parangi, M. Mishra","doi":"10.1080/02603594.2020.1755273","DOIUrl":"https://doi.org/10.1080/02603594.2020.1755273","url":null,"abstract":"ABSTRACT Biodiesel belongs to the class of renewable and sustainable fuel sources receiving more attention as a rapidly growing field with higher potential than other energy sources. The main shortcoming of biodiesel production is the high cost of the production process and the catalytic system. The present contribution aims to briefly review and evaluate the performance of solid acid catalysts (SACs) focused on biodiesel production through esterification and transesterification. The review article gives insight into the prime catalytic characteristics that can be modified in an economical and eco-friendly way to reduce overall cost of fuel products on an industrial scale. The advantages and disadvantages of the used catalytic systems are discussed and compared with their catalytic activity and stability.","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"92 1","pages":"176 - 216"},"PeriodicalIF":5.4,"publicationDate":"2020-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74720615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal/Organosilicon Complexes: Structure, Reactivity, and Considerations for Catalysis","authors":"Matthew T. Whited, B. Taylor","doi":"10.1080/02603594.2020.1737026","DOIUrl":"https://doi.org/10.1080/02603594.2020.1737026","url":null,"abstract":"ABSTRACT Complexes featuring metal–silicon bonds play a key role in many catalytic and stoichiometric transformations. As such, it is important to understand the underlying electronic structures of such units and the reactivity patterns they engender, which in many cases differ substantially from well-known patterns for metal–carbon bonds. This review seeks to provide a framework for understanding reactivity of metal/organosilicon units, focusing specifically on considerations for catalysis, similarities and differences between M–C and M–Si chemistry, and possibilities for M/Si cooperative catalysis. Graphical abstract","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"2012 1","pages":"217 - 276"},"PeriodicalIF":5.4,"publicationDate":"2020-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87885194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crystallography of Reactive Intermediates","authors":"Anuvab Das, Gerard P Van Trieste, D. Powers","doi":"10.1080/02603594.2020.1747054","DOIUrl":"https://doi.org/10.1080/02603594.2020.1747054","url":null,"abstract":"ABSTRACT Metal–ligand (M–L) multiply bonded complexes hold a central place in inorganic chemistry and catalysis: From fundamental and historical perspectives, these species have played a critical role in the articulation of important bonding principles (i.e. the vanadyl ion in the development of molecular orbital theory); from a practical perspective, these species are critical intermediates in a variety of chemical reactions (i.e. N2 and O2 reduction, H2O oxidation, and C–H functionalization). For many high-valent, early metal complexes, overlap of ligand-based electrons with vacant π-symmetry orbitals leads to strong M–L multiple bonds. The stability of these species enables straightforward characterization with a suite of standard spectroscopic and diffraction-based experiments. Mid- and late-transition metal complexes, with attendant higher d-electron counts, often support more reactive M–L multiply bonded fragments. The reactivity of these species simultaneously renders them attractive intermediates for catalysis but challenging synthetic targets to observe and characterize. A number of important strategies have been advanced to enable experimental characterization of mid- to late-metal–ligand multiply bonded species. Synthetic manipulation of the coordination geometry and ligand donicity, as well as introduction of sterically encumbering ligands, have each emerged as powerful methods to tame the inherent reactivity of kinetically labile M–L multiple bonds. While these efforts have resulted in families of well-characterized complexes and provided critical insights regarding structure and bonding, the synthetic derivatization required to stabilize M–L fragments of interest often obviates the substrate functionalization activity relevant to catalysis. Photochemical synthesis of reactive species provides a conceptually attractive strategy to generate reactive M–L fragments under conditions compatible with time-resolved or cryogenic steady-state characterization, and photogeneration has enabled observation of a number of reactive M–L fragments. The suite of tools available to characterize photogenerated reactive species is often more limited than typical for kinetically stabilized complexes and structural characterization is typically not possible. Recently, photocrystallographic experiments, in which reactive M–L multiply bonded intermediates are generated within single-crystal matrices, have been advanced as a strategy to interrogate the structures of reactive intermediates in C–H functionalization. This Comment describes the historical antecedents to these experiments, highlights examples of photocrystallographic characterization of reactive intermediates, and discusses future opportunities. Graphical Abstract","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"60 1","pages":"116 - 158"},"PeriodicalIF":5.4,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77884695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strategies to Improve Electrical and Ionic Conductivities of Metal–Organic Frameworks","authors":"M. A. Gordillo, S. Saha","doi":"10.1080/02603594.2019.1704738","DOIUrl":"https://doi.org/10.1080/02603594.2019.1704738","url":null,"abstract":"ABSTRACT Owing to their highly ordered crystalline structures and ease of introducing different electroactive meta ions and ligands, metal–organic frameworks (MOFs) have emerged as promising electrical and ion conducting materials. In this minireview, we highlighted recent advances in guest-induced electronic and ionic conductivity of MOFs, which are otherwise insulators or poor conductors. Examples of conductivity enhancement upon guest-induced framework oxidation or reduction, π-donor/acceptor stack formation, crosslinking of coordinatively unsaturated nodes, and binding of mobile Li+ and Mg2+ with the MOFs are discussed. Graphical abstract","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"9 1","pages":"106 - 86"},"PeriodicalIF":5.4,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83031709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photocatalysis with Transition Metal Based Photosensitizers","authors":"J. Shon, Thomas S. Teets","doi":"10.1080/02603594.2019.1694517","DOIUrl":"https://doi.org/10.1080/02603594.2019.1694517","url":null,"abstract":"ABSTRACT Photocatalysis under visible-light irradiation has many applications in organic synthesis and solar fuels. Out of the many photosensitizers that have been used in photocatalysis applications, metal-based photosensitizers are most prominent, given their excellent tunability and performance. In this review, different categories of metal-based photosensitizers are summarized and their function in photocatalytic reactions is described. There are also examples of recently developed photocatalytic applications using these photosensitizers. Graphical abstract","PeriodicalId":10481,"journal":{"name":"Comments on Inorganic Chemistry","volume":"96 1","pages":"53 - 85"},"PeriodicalIF":5.4,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86716494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}