Central European Journal of Chemistry最新文献

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Crystallographic and structural characterization of heterometallic platinum complexes Part V. Heteropentanuclear complexes 异金属铂配合物的晶体学和结构表征。第五部分:异戊核配合物
Central European Journal of Chemistry Pub Date : 2015-06-01 DOI: 10.2478/s11532-013-0382-5
M. Melnik, P. Mikuš, C. Holloway
{"title":"Crystallographic and structural characterization of heterometallic platinum complexes Part V. Heteropentanuclear complexes","authors":"M. Melnik, P. Mikuš, C. Holloway","doi":"10.2478/s11532-013-0382-5","DOIUrl":"https://doi.org/10.2478/s11532-013-0382-5","url":null,"abstract":"AbstractThis review classifies and analyzes over eighty heteropentanuclear Pt complexes. There are eight types of metal combinations: Pt4M, Pt3M2, Pt2M3, PtM4, Pt3MM′, Pt2M2M′, PtM2M′2 and PtM3M′. The five metal atoms are in a wide variety of arrangements: trigonal-bipyramidal (most common), square-pyramidal, spike-triangular, butterfly, cubane, linear and one unique. Platinum bonds to a variety of triad partner metal atoms, soft, through borderline to hard. The shortest Pt-M bond distances for non-transition and transition M are 2.406(4) Å (M = Ge) and 2.30(1) Å (M = Co). The shortest Pt-Pt bond distance is 2.580(1) Å. Several relationships between the structural parameters were found and are discussed. Several complexes exist in two isomeric forms and others contain two crystallographically independent molecules. Both the isomers as well as independent molecules are examples of distortion isomerism.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"541 1","pages":"283-306"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77720784","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: 3
Preparation of selectively protected protoescigenin derivatives for synthesis of escin analogs and neoglycoconjugates 选择性保护原叶香素衍生物的制备,用于合成叶香素类似物和新糖缀合物
Central European Journal of Chemistry Pub Date : 2014-12-01 DOI: 10.2478/s11532-014-0572-9
K. Jatczak, Mariusz M. Gruza, Katarzyna Filip, P. Cmoch, G. Grynkiewicz
{"title":"Preparation of selectively protected protoescigenin derivatives for synthesis of escin analogs and neoglycoconjugates","authors":"K. Jatczak, Mariusz M. Gruza, Katarzyna Filip, P. Cmoch, G. Grynkiewicz","doi":"10.2478/s11532-014-0572-9","DOIUrl":"https://doi.org/10.2478/s11532-014-0572-9","url":null,"abstract":"Protoescigenin, the main aglycone of horse chestnut saponin mixture known as escin, was selected as substrate for exploratory chemistry towards selective protection, followed by propargyl ether formation and subsequent condensation with azido-monosaccharides, to obtain novel triazole linked conjugates of the triterpene.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"10 1","pages":"1222-1231"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84022451","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: 2
Erratum to: “Occurrence of 2-phenylphenol in food paper packages” “食品纸包装中2-苯酚的含量”的勘误表
Central European Journal of Chemistry Pub Date : 2014-12-01 DOI: 10.2478/s11532-014-0579-2
L. Votavová, K. Hanušová, Lukáš Vápenka, J. Dobiáš, F. Kvasnička
{"title":"Erratum to: “Occurrence of 2-phenylphenol in food paper packages”","authors":"L. Votavová, K. Hanušová, Lukáš Vápenka, J. Dobiáš, F. Kvasnička","doi":"10.2478/s11532-014-0579-2","DOIUrl":"https://doi.org/10.2478/s11532-014-0579-2","url":null,"abstract":"The original version of the article was published in Cent. Eur. J. Chem. 12(11) (2014) pp. 1162–1168. Unfortunately, the original version of this article contains some mistakes in the Tables 2 and 3. Corrected versions of the tables are presented below.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"9 1","pages":"1304-1305"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83660229","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
Investigations of ternary complexes of Co(II) and Ni(II) with oxydiacetate anion and 1,10-phenanthroline or 2,2′-bipyridine in solutions Co(II)和Ni(II)与氧化二乙酸阴离子和1,10-菲罗啉或2,2 ' -联吡啶三元配合物的研究
Central European Journal of Chemistry Pub Date : 2014-11-26 DOI: 10.2478/s11532-013-0353-x
D. Wyrzykowski, J. Pranczk, D. Jacewicz, A. Tesmar, B. Pilarski, L. Chmurzyński
{"title":"Investigations of ternary complexes of Co(II) and Ni(II) with oxydiacetate anion and 1,10-phenanthroline or 2,2′-bipyridine in solutions","authors":"D. Wyrzykowski, J. Pranczk, D. Jacewicz, A. Tesmar, B. Pilarski, L. Chmurzyński","doi":"10.2478/s11532-013-0353-x","DOIUrl":"https://doi.org/10.2478/s11532-013-0353-x","url":null,"abstract":"AbstractPotentiometric (PT) and conductometric (CT) titration methods have been used to determine the stoichiometry and formation constants in water for a series of ternary complexes of Co(II) and Ni(II) involving the oxydiacetate anion (ODA) and 1,10-phenanthroline (phen) or 2,2′-bipyridine (bipy) ligands, namely [Co(ODA)(phen)(H2O)], [Co(ODA)(bpy)(H2O)], [Ni(ODA)(phen)(H2O)] and [Ni(ODA)(bpy)(H2O)]. The ternary complex formation process was found to take place in a stepwise manner in which the oxydiacetate ligand acts as a primary ligand and the phen or bipy ligands act as auxiliary ones. The stability of the ternary complexes formed is discussed in the relation to the corresponding binary ones. Furthermore, the kinetics of the substitution reactions of the aqua ligands in the coordination sphere of the Ni-ODA and Co-ODA complexes to phen or bipy were studied by the stopped-flow method. The kinetic measurements were performed in the 288–303 K temperature range, at a constant concentration of phen or bipy and at seven different concentrations of the binary complexes (4–7 mM). The influence of experimental conditions and the kind of the auxiliary ligands (phen/bipy) on the substitution rate was discussed.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"3 1","pages":"107-114"},"PeriodicalIF":0.0,"publicationDate":"2014-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80374641","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: 14
Systematic investigation and in vitro biocompatibility studies on mesoporous europium doped hydroxyapatite 介孔铕掺杂羟基磷灰石的系统研究及体外生物相容性研究
Central European Journal of Chemistry Pub Date : 2014-10-01 DOI: 10.2478/s11532-014-0554-y
C. Popa, C. Ciobanu, S. Iconaru, M. Stan, A. Dinischiotu, C. Negrila, M. Motelica‐Heino, R. Guégan, D. Predoi
{"title":"Systematic investigation and in vitro biocompatibility studies on mesoporous europium doped hydroxyapatite","authors":"C. Popa, C. Ciobanu, S. Iconaru, M. Stan, A. Dinischiotu, C. Negrila, M. Motelica‐Heino, R. Guégan, D. Predoi","doi":"10.2478/s11532-014-0554-y","DOIUrl":"https://doi.org/10.2478/s11532-014-0554-y","url":null,"abstract":"AbstractThis paper reports the systematic investigation of europium doped hydroxyapatite (Eu:HAp). A set of complementary techniques, namely Fourier Transform Infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and the Brunauer-Emmett-Teller (BET) technique were used towards attaining a detailed understanding of Eu:HAp. The XPS analysis confirmed the substitution of Ca ions by Eu ions in the Eu:HAp samples. Secondly, Eu:HAp and pure HAp present type IV isotherms with a hysteresis loop at a relative pressure (P/P0) between 0.4 and 1.0, indicating the presence of mesopores. Finally, the in vitro biological effects of Eu:HAp nanoparticles were evaluated by focusing on the F-actin filament pattern and heat shock proteins (Hsp) expression in HEK293 human kidney cell line. Fluorescence microscopy studies of the actin protein revealed no changes of the immunolabelling profile in the renal cells cultured in the presence of Eu:HAp nanoparticles. Hsp60, Hsp70 and Hsp90 expressions measured by Western blot analysis were not affected after 24 and 48 hours exposure. Taken together, these results confirmed the lack of toxicity and the biocompatibility of the Eu:HAp nanoparticles. Consequently, the possibility of using these nanoparticles for medical purposes without affecting the renal function can be envisaged.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"18 1","pages":"1032-1046"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89729983","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: 24
L-alaninium perrhenate: crystal structure and non-linear optical properties l -过铼酸铝:晶体结构和非线性光学性质
Central European Journal of Chemistry Pub Date : 2014-10-01 DOI: 10.2478/s11532-014-0548-9
V. Rodrigues, M. M. Costa, E. Gomes, D. Isakov, M. Belsley
{"title":"L-alaninium perrhenate: crystal structure and non-linear optical properties","authors":"V. Rodrigues, M. M. Costa, E. Gomes, D. Isakov, M. Belsley","doi":"10.2478/s11532-014-0548-9","DOIUrl":"https://doi.org/10.2478/s11532-014-0548-9","url":null,"abstract":"AbstractThe crystal structure and non-linear optical properties of L-alaninium perrhenate, C3H8NO2+ ReO4−, are reported. The protonated amino acid and the perrhenate anion have their usual geometries. The three-dimensional hydrogen-bonded network can be seen as a stacking of layers parallel to the (100) planes. Each layer is formed by chains of alternating positive and negative ions along the b and c axes. Hydrogen bonding of adjacent layers forms alternating chains along the a axis. A high damage threshold and a second-harmonic generation efficiency three times that of KDP make this new material potentially useful in non-linear optics.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"3 1","pages":"1016-1022"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80275537","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: 2
Synthesis, characterization and controlled toxicity of a novel hybrid material based on cisplatin and docetaxel 新型顺铂-多西他赛杂化材料的合成、表征及毒性控制
Central European Journal of Chemistry Pub Date : 2014-10-01 DOI: 10.2478/s11532-014-0536-0
M. Prodana, A. Voiculet, S. Gârea, M. Radu, H. Iovu, I. Demetrescu, A. Dinischiotu
{"title":"Synthesis, characterization and controlled toxicity of a novel hybrid material based on cisplatin and docetaxel","authors":"M. Prodana, A. Voiculet, S. Gârea, M. Radu, H. Iovu, I. Demetrescu, A. Dinischiotu","doi":"10.2478/s11532-014-0536-0","DOIUrl":"https://doi.org/10.2478/s11532-014-0536-0","url":null,"abstract":"This paper is focused on the synthesis and characterization of a novel hybrid material based on cisplatin and docetaxel-loaded functionalized simultanously carbon nanotubes able to be used in cancer therapy as drug delivery system with controlled toxicity. This material was physico-chemically investigated by determining the structure, as evidenced by Fourier transform infrared (FTIR) spectroscopy, transmission electronmicroscopy (TEM) and its stability was studied with the aid of thermogravimetric analysis (TGA). The amount of platinum ions released into the solution of simulated body fluid (SBF) was highlighted by coupled plasma mass spectrometry (ICP-MS). Toxicology experiments were performed with MDA-MB 231 breast cancer epithelial cells. The performance of the new drug delivery hybrid material was compared with functionalised carbon nanotubes with therapeutic agents functionalized with a single therapeutic agent.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"24 1","pages":"1008-1015"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83460678","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: 6
Controlled release of amoxicillin from bacterial cellulose membranes 细菌纤维素膜中阿莫西林的控制释放
Central European Journal of Chemistry Pub Date : 2014-09-01 DOI: 10.2478/s11532-014-0541-3
Ramona-Daniela Păvăloiu, A. Stoica, M. Stroescu, T. Dobre
{"title":"Controlled release of amoxicillin from bacterial cellulose membranes","authors":"Ramona-Daniela Păvăloiu, A. Stoica, M. Stroescu, T. Dobre","doi":"10.2478/s11532-014-0541-3","DOIUrl":"https://doi.org/10.2478/s11532-014-0541-3","url":null,"abstract":"Bacterial cellulose (BC), a natural polymer with unique physical and mechanical properties, has several applications in the biomedical field, including drug loading and controlled drug delivery. For this study, a Box-Behnken experimental design was employed as a statistical tool to optimize the release of a model drug, amoxicillin, from BC membranes. Independent variables studied were the concentration of the drug (X1), the concentration of glycerol (X2) and the concentration of a permeation enhancer (X3). From the variables studied, drug concentration had the highest effect on drug release. Among the other independent variables, th linear and quadratic X2 terms, the linear X3 term and the interaction term X2X3 were found to affect the release of amoxicillin from bacterial cellulose membranes.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"73 1","pages":"962-967"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77116011","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: 23
High-pressure phase equilibrium calculations for carbon dioxide + cyclopentane binary system 二氧化碳+环戊烷二元体系的高压相平衡计算
Central European Journal of Chemistry Pub Date : 2014-09-01 DOI: 10.2478/s11532-013-0393-2
Sergiu Sima, Julia Cruz-Doblas, M. Cismondi, Catinca Secuianu
{"title":"High-pressure phase equilibrium calculations for carbon dioxide + cyclopentane binary system","authors":"Sergiu Sima, Julia Cruz-Doblas, M. Cismondi, Catinca Secuianu","doi":"10.2478/s11532-013-0393-2","DOIUrl":"https://doi.org/10.2478/s11532-013-0393-2","url":null,"abstract":"The phase behavior of the carbon dioxide + cycloalkane mixtures usually receives low attention, though these systems are important for many industries, e.g. the carbon capture and storage. In this paper calculations results for the carbon dioxide + cyclopentane binary system are presented, based on SRK and PR cubic equations of state with classical van der Waals mixing rules. A single set of binary parameters for each model was proposed to predict the global phase behavior of the system in a wide range of pressure and temperature. Albeit the thermodynamic models used are simple, they are able to represent fairly well the phase behavior of the system analyzed in this paper.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"13 1","pages":"918-927"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88445501","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: 3
A multi-property fluorescent probe for the investigation of polymer dynamics near the glass transition 用于研究玻璃化转变附近聚合物动力学的多性能荧光探针
Central European Journal of Chemistry Pub Date : 2014-09-01 DOI: 10.2478/s11532-014-0544-0
J. Siekierzycka, Catharina Hippius, F. Würthner, René M. Williams, A. Brouwer
{"title":"A multi-property fluorescent probe for the investigation of polymer dynamics near the glass transition","authors":"J. Siekierzycka, Catharina Hippius, F. Würthner, René M. Williams, A. Brouwer","doi":"10.2478/s11532-014-0544-0","DOIUrl":"https://doi.org/10.2478/s11532-014-0544-0","url":null,"abstract":"In addition to the commonly observed single molecule fluorescence intensity fluctuations due to molecular reorientation dynamics, a perylene bisimide-calixarene compound (1) shows additional on-off fluctuations due to its ability to undergo intramolecular excited state electron transfer (PET). This quenching process is turned on rather sharply when a film of poly(vinylacetate) containing 1 is heated above its glass transition temperature (Tg), which indicates that the electron transfer process depends on the availability of sufficient free volume. Spatial heterogeneities cause different individual molecules to reach the electron transfer regime at different temperatures, but these heterogeneities also fluctuate in time: in the matrix above Tg molecules that are mostly nonfluorescent due to PET can become fluorescent again on timescales of seconds to minutes.The two different mechanisms for intensity fluctuation, rotation and PET, thus far only observed in compound 1, make it a unique probe for the dynamics of supercooled liquids.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"35 1","pages":"937-952"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75303041","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: 3
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