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{"title":"Influence of the nature of an alkylammonium cation on the structure of the metal-organic frameworks based on ZnII and 2,5-furandicarboxylate","authors":"A. A. Shurenkov,&nbsp;A. A. Lysova,&nbsp;D. G. Samsonenko,&nbsp;V. P. Fedin","doi":"10.1007/s11172-025-4689-0","DOIUrl":"10.1007/s11172-025-4689-0","url":null,"abstract":"<div><p>The influence of the nature of an organic cation (dimethylammonium (Me₂NH₂⁺), diethylammonium (Et₂NH₂⁺), and tetramethylammonium (Me₄N⁺)) on the structure of the metal-organic frameworks (MOFs) was studied. The presence of organic dimethyl- or diethylammonium cations, which can act as proton donors in hydrogen bonding, in the Zn²⁺—fdc²⁻—DMF system (fdc²⁻ is 2,5-furandicarboxylate) results in the formation of MOFs [Me₂NH₂]₂[Zn₃(fdc)₄]•2DMF(<b>1</b>) and [Et₂NH₂]₂[Zn₃(fdc)₄]•2DMF•2H₂O (<b>2</b>), which have similar crystal structures of the anionic type and crystallize in the same space group <i>P</i>2₁/<i>c</i>. By contrast, the organic cation Me₄N⁺, which does not contain potential hydrogen-bond donors, promotes the distortion of the framework structure and the formation of a new three-dimensional (3D) anionic MOF [Me₄N]₂[Zn₃(fdc)₄]•DMF•0.5H₂O (<b>3</b>) crystallizing in the space group <i>P</i>2₁/<i>n</i>. Compounds <b>2</b> and <b>3</b> were characterized by single-crystal X-ray diffraction analysis, powder X-ray diffraction analysis, elemental analysis, thermogravimetry, and IR spectroscopy.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2044 - 2051"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Divergent synthesis of thiophene-substituted 1,3,4-oxadiazoles from chloroacrylaldehydes and mercaptoacetyl hydrazides","authors":"E. B. Uliankin,&nbsp;A. L. Samsonenko,&nbsp;S. A. Chernenko,&nbsp;V. Yu. Shuvalov,&nbsp;A. L. Shatsauskas,&nbsp;A. S. Kostyuchenko,&nbsp;A. S. Fisyuk","doi":"10.1007/s11172-025-4697-0","DOIUrl":"10.1007/s11172-025-4697-0","url":null,"abstract":"<div><p><i>N</i>′-Arylidenethiophene-2-carbohydrazides were first prepared by the reaction of 3-chloroacrylaldehydes with mercaptoacetylhydrazines. The resulting <i>N</i>′-arylidenethiophene-2-carbohydrazides were converted to the corresponding 1,3,4-oxadiazole derivatives by heating in the presence of iodine. A divergent approach to the synthesis of thiophene-substituted 1,3,4-oxadiazoles was developed.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2136 - 2142"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of hybrid compounds based on 5Z,9Z-dienoic acids and polycyclic amines and study of their cytotoxic activity","authors":"A. A. Makarov,&nbsp;L. U. Dzhemileva,&nbsp;E. Kh. Makarova,&nbsp;U. M. Dzhemilev,&nbsp;V. A. D’yakonov","doi":"10.1007/s11172-025-4706-3","DOIUrl":"10.1007/s11172-025-4706-3","url":null,"abstract":"<div><p>New hybrid compounds were synthesized by the reaction of effective inhibitors of human topoisomerase I, natural (5<i>Z</i>,9<i>Z</i>)-eicosa-5,9-dienoic acid and synthetic (5<i>Z</i>,9<i>Z</i>)-phenylundeca-5,9-dienoic acid, with polycyclic amines. The obtained hybrid compounds were found to have pronounced cytotoxic activity against five studied cell lines (Jurkat, U937, K562, HEK293, fibroblasts), with the lead compound showing selective activity against Jurkat and K562 cells; its activity was found to be comparable with that of comparison drugs, camptothecin and etoposide.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2207 - 2213"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"General Meeting of the Russian Academy of Sciences","authors":"G. N. Konnova","doi":"10.1007/s11172-025-4708-1","DOIUrl":"10.1007/s11172-025-4708-1","url":null,"abstract":"<div><p>The scientific and scientific-organizational activities of the Russian Academy of Sciences (RAS) and its Divisions in 2024 are presented in the reports of RAS authorities. The most significant results obtained by scientists of the Academy in 2024 are described and strategic initiatives for the near future are outlined. Data on RAS awards to scientists are given. Information about elections of Full Members and Corresponding Members of RAS is presented.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2224 - 2233"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A model-based generalization of the bandwidth method for damping estimation","authors":"Amir H. Danesh-Yazdi,&nbsp;Daniel T. Kawano","doi":"10.1007/s00419-025-02914-4","DOIUrl":"10.1007/s00419-025-02914-4","url":null,"abstract":"<div><p>The classical half-power bandwidth is one of several approaches that can be used to estimate the modal damping ratio of a dynamic system from its frequency response function (FRF). Although relatively simple to implement, this method is accurate when applied to the displacement and velocity FRFs of lightly damped, harmonically forced viscous systems for which the vibration modes are far enough apart. In this work, we introduce a modified definition of the bandwidth along with a generalized approach that we use to develop exact expressions for the damping parameter of viscously and hysteretically damped single-degree-of-freedom systems under different inputs over a range of permissible amplitude ratios. When considering a direct force input, we find that the same closed-form expression can be used to determine the damping parameter from the displacement and acceleration FRFs. We also utilize this technique to establish exact damping parameter expressions for harmonic base excitation cases for the first time in the literature. Application of the modified bandwidth method to experimentally obtained FRFs from single- and two-degree-of-freedom systems reveals that this approach is far superior to its classical alternative at high damping ratios and generally comparable at lower ones in the higher-confidence data regions.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"95 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite element analysis of bone remodeling induced by swelling anchors considering heterogeneous properties.","authors":"Amirreza Sadighi, Mehrangiz Taheri, Nolan Black, Jordan Stolle, Moein Taghvaei, Madeline Boyes, Sorin Siegler, Thomas P Schaer, Ahmad R Najafi","doi":"10.1007/s10237-025-02001-1","DOIUrl":"https://doi.org/10.1007/s10237-025-02001-1","url":null,"abstract":"<p><p>This study explored the biomechanical behavior of co-polymeric swelling bone anchors and their bone remodeling induction using finite element analysis of a model with heterogeneous properties. First, a hygro-elastic finite element framework was developed to capture the swelling of the bone anchors over time by moisture gain, validated against the data from free swelling experiments. Afterward, finite element models were developed using micro-CT data to capture heterogeneous material properties, and finally, bone remodeling induced by the swelling, acting as a mechanical stimulus, was investigated. The study examined three co-polymeric ratios of methyl methacrylate and acrylic acid (MMA/AA)-80/20, 85/15, and 90/10-and assessed the impact of their associated swelling ratios on bone remodeling and fixation strength. Moreover, in parallel with the numerical investigations, an in vivo study using a sheep model was conducted to evaluate the biocompatibility of these anchors and bone remodeling response to the swelling. The numerical findings highlighted the importance of optimizing swelling ratios to enhance mechanical engagement without causing adverse resorption. More specifically, the results demonstrated that bone regeneration in the region of interest is highly sensitive to the swelling ratio. When the swelling is maintained within an optimal range-such as in the 85/15 composition-favorable densification occurs at the bone-implant interface, enhancing osteointegration. In contrast, excessive swelling (e.g., the 80/20 composition) induces localized overload resorption due to elevated stress concentrations at the interface, which may compromise implant success. Additionally, correlations found between the numerical and in vivo study outcomes supported the notion of an optimal swelling threshold and confirmed the predictive capabilities of the developed hygro-elastic finite element framework. To underscore the importance of favorable bone remodeling in the interface, a push-out study was performed to analyze the fixation strength prior and subsequent to bone remodeling. The significant difference in push-out forces before and after remodeling demonstrates that bone densification at the interface can substantially enhance fixation strength.</p>","PeriodicalId":489,"journal":{"name":"Biomechanics and Modeling in Mechanobiology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, properties, and study of anticoagulant and antiplatelet activity of ketoximes containing the 1,3-dioxane moiety","authors":"Ya. S. Artamonova,&nbsp;A. I. Poptsov,&nbsp;Yu. G. Borisova,&nbsp;A. A. Golovanov,&nbsp;G. Z. Raskildina,&nbsp;S. S. Zlotsky,&nbsp;R. M. Sultanova","doi":"10.1007/s11172-025-4701-8","DOIUrl":"10.1007/s11172-025-4701-8","url":null,"abstract":"<div><p>Modification of ketoximes containing 1,3-dioxane moiety in reactions with alkyl halides, bifunctional compounds, and acylation agents was studied, and anticoagulation and antiplatelet activity of both starting compounds and products was investigated. The synthesized ethers, esters, and carbamates showed anticoagulant activity at the level of acetylsalicylic acid, whereas phenylcarbamoyl oxime containing a cycloacetal group was found to be comparable to sodium etamsylate in pro-aggregation activity and enhancement of platelet aggregation.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2176 - 2183"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Specificity of the reaction between carboryne and 3,6-diaryl-1,2,4,5-tetrazines","authors":"T. D. Moseev,&nbsp;D. S. Kopchuk,&nbsp;L. A. Smyshlyaeva,&nbsp;I. A. Khalymbadzha,&nbsp;P. A. Slepukhin,&nbsp;A. N. Tsmokalyuk,&nbsp;A. V. Rybakova,&nbsp;G. V. Zyryanov,&nbsp;M. V. Varaksin,&nbsp;V. N. Charushin,&nbsp;O. N. Chupakhin","doi":"10.1007/s11172-025-4696-1","DOIUrl":"10.1007/s11172-025-4696-1","url":null,"abstract":"<div><p>The possibility of the reactions of carboryne, a highly reactive organoboron analog of aryne, with 3,6-bis-substituted 1,2,4,5-tetrazines was studied. These reactions do not afford [4+2]-cycloaddition products. The reaction with 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine leads to <i>N</i>-carboranylation. In the case of 3,6-diphenyl-1,2,4,5-tetrazine, the sequential addition and rearrangement occur to give a dimeric product in 21% yield. The structures of the obtained organoboron compounds were confirmed by NMR spectroscopy, mass spectrometry, and X-ray diffraction analysis. The proposed mechanisms of the chemical transformations were additionally confirmed by the calculations. The results of this study are of interest for the targeted design of organoboron and hybrid materials as well as of potential agents for boron neutron capture therapy.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2125 - 2135"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanisms of thermal decomposition of 1-[2,2-bis(methoxy-NNO-azoxy)ethyl]pyrazole","authors":"B. E. Krisyuk,&nbsp;I. N. Zyuzin,&nbsp;T. M. Sypko,&nbsp;N. V. Chukanov","doi":"10.1007/s11172-025-4685-4","DOIUrl":"10.1007/s11172-025-4685-4","url":null,"abstract":"<div><p>The previously proposed alternative mechanisms of thermal decomposition of 1-[2,2-bis(methoxy-<i>NNO</i>-azoxy)ethyl]pyrazole were verified by quantum chemical calculations. The main ones are two competitive channels: 1) the transfer of one of the two β-H atoms to the O(1) atom <i>via</i> a 5-membered transition state with an activation enthalpy of ∼160 kJ mol⁻¹ and MeOH and N₂O as the main volatile products; 2) the transfer of an H atom to the pyrazole ring with subsequent elimination of pyrazole and an activation enthalpy of ∼180 kJ mol⁻¹. An alternative mechanism <i>via</i> a zwitterionic intermediate with a three-center hydrogen bond and an activation enthalpy of 263 kJ mol⁻¹ cannot compete with the main channels in the gas phase. However, taking into account a number of factors of thermolysis in the liquid phase and a relatively low barrier of conversion of the zwitterionic intermediate (145 kJ mol⁻¹), the alternative mechanism can make a considerable contribution to the overall process, with its contribution being determined by the stationary concentration of the zwitterionic intermediate.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"2007 - 2018"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3a,6a-Diazapentalenes (pyrazolo[1,2-a]pyrazoles)","authors":"E. V. Babaev,&nbsp;S. Yu. Panshina,&nbsp;N. A. Alzhapparova,&nbsp;M. K. Ibraev,&nbsp;M. S. Usenova","doi":"10.1007/s11172-025-4681-8","DOIUrl":"10.1007/s11172-025-4681-8","url":null,"abstract":"<div><p>The review considers the electronic structure, geometry, and spectral properties of 3a,6a-diazapentalenes, a heterocyclic system with two bridged nitrogen atoms, routes to the synthesis of these compounds from pyrazole derivatives, and their reactivity (reactions with electrophiles and cycloaddition).</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 7","pages":"1958 - 1975"},"PeriodicalIF":1.7,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}