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Two-Dimensional Structures Composed of Cross-Shaped Molecules Adsorbed on Solid Surfaces – a Computational Model 由吸附在固体表面的十字形分子组成的二维结构-一个计算模型
Annales UMCS, Chemia Pub Date : 2014-10-17 DOI: 10.2478/umcschem-2013-0002
A. Kasperski, P. Szabelski
{"title":"Two-Dimensional Structures Composed of Cross-Shaped Molecules Adsorbed on Solid Surfaces – a Computational Model","authors":"A. Kasperski, P. Szabelski","doi":"10.2478/umcschem-2013-0002","DOIUrl":"https://doi.org/10.2478/umcschem-2013-0002","url":null,"abstract":"Abstract The ability of simple molecular building blocks to form extended ordered patterns by adsorption and self-assembly on solid substrates is an advantageous property that has been widely used to create nanostructured surfaces. In this contribution we demonstrate how the lattice Monte Carlo simulation method can be used to predict morphology of adsorbed overlayers comprising simple functional cross-shaped molecules resembling phthalocyanines and porphyrins. In particular, we focus on the influence of the distribution of active interaction centers within a model crossshaped molecule on the structure of the resulting molecular networks. Additionally, we investigate how using racemic mixtures of input prochiral molecules affects the chirality and porosity of the corresponding ordered patters. The obtained results show that suitable manipulation of the chemistry of cross-shaped building block allows for the controlled creation of largely diversified molecular porous networks.","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"36 1","pages":"13 - 23"},"PeriodicalIF":0.0,"publicationDate":"2014-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85271714","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: 1
Influence of the Electrolyte Type on the Adsorption and Electrokinetic Properties of the Ionic Polyamino Acids – Cr2O3 System 电解质类型对离子型多氨基酸- Cr2O3体系吸附及电动力学性能的影响
Annales UMCS, Chemia Pub Date : 2014-10-17 DOI: 10.2478/umcschem-2013-0007
I. Ostolska, M. Wiśniewska
{"title":"Influence of the Electrolyte Type on the Adsorption and Electrokinetic Properties of the Ionic Polyamino Acids – Cr2O3 System","authors":"I. Ostolska, M. Wiśniewska","doi":"10.2478/umcschem-2013-0007","DOIUrl":"https://doi.org/10.2478/umcschem-2013-0007","url":null,"abstract":"Abstract The influence of a kind of support electrolyte on the ionic polyamino acids adsorption at the chromium (III) oxide – polymer solution interface was investigated. The NaCl and CaCl2 were used as the background electrolytes. In order to determine the effect of the electrolyte, the same value of ionic strength of the test solutions were taken. It was proved that formation of intermolecular and intramolecular complexes in the presence of divalent calcium ions is responsible for essential changes in polymer adsorption. Related to the ionic character of polyamino acid two different adsorption behaviours can be observed. The increase of the ASP adsorption amount in the presence of calcium ions may be explained by formation of complexes between the dissociated carboxylic groups and Ca2+ ions. The opposite situation takes place in the case of polylysine – the application of CaCl2 results in the dramatic decrease in the polymer adsorption caused by blocking the active sites available for LYS macromolecules. In order to make a comprehensive analysis, the zeta potential and surface charge density measurements were performed taking into account the kind of the background electrolyte. The above-mentioned tests were carried out in the absence and presence of the polyamino acid at two different concentrations – 10 and 100 ppm respectively.","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"37 1","pages":"75 - 93"},"PeriodicalIF":0.0,"publicationDate":"2014-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90155733","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: 1
FT-IR/PAS Study of Surface EDTA-ZnO Interactions 表面EDTA-ZnO相互作用的FT-IR/PAS研究
Annales UMCS, Chemia Pub Date : 2014-10-17 DOI: 10.2478/umcschem-2013-0003
M. Kuśmierz, S. Pasieczna-Patkowska
{"title":"FT-IR/PAS Study of Surface EDTA-ZnO Interactions","authors":"M. Kuśmierz, S. Pasieczna-Patkowska","doi":"10.2478/umcschem-2013-0003","DOIUrl":"https://doi.org/10.2478/umcschem-2013-0003","url":null,"abstract":"Abstract The interaction of EDTA disodium salt with zinc oxide was investigated by photoacoustic (PA) FT-IR. It was demonstrated that EDTA-III adsorbs on ZnO, and the process mimics behaviour of EDTA-oxide systems, in which IEPS of oxide catalytic supports is higher than 9. Model of the interaction, described in literature, was discussed.","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"279 1","pages":"25 - 31"},"PeriodicalIF":0.0,"publicationDate":"2014-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73660989","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: 1
Analysis of Cosmetic Products Using Different IR Spectroscopy Techniques 不同红外光谱技术对化妆品的分析
Annales UMCS, Chemia Pub Date : 2014-10-17 DOI: 10.2478/umcschem-2013-0008
S. Pasieczna-Patkowska, T. Olejnik
{"title":"Analysis of Cosmetic Products Using Different IR Spectroscopy Techniques","authors":"S. Pasieczna-Patkowska, T. Olejnik","doi":"10.2478/umcschem-2013-0008","DOIUrl":"https://doi.org/10.2478/umcschem-2013-0008","url":null,"abstract":"Abstract This article describes the application of IR spectroscopic methods in the study of the composition of finished cosmetic products. Four spectroscopic techniques: TS (transmission spectroscopy), PAS (photoacoustic spectroscopy), ATR (attenuated total reflectance) and DRS (diffuse reflectance spectroscopy) were used for this purpose. Tested cosmetic products were of different consistency and application. The choice of spectroscopic techniques was dictated by the physical state and consistency of the sample.","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"21 1","pages":"106 - 95"},"PeriodicalIF":0.0,"publicationDate":"2014-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89446230","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: 18
Synthesis and Characterization of Activated Carbons Obtained from Nutshells 坚果壳活性炭的合成与表征
Annales UMCS, Chemia Pub Date : 2014-10-17 DOI: 10.2478/umcschem-2013-0005
D. Mańko, M. Barczak, A. Zdziennicka
{"title":"Synthesis and Characterization of Activated Carbons Obtained from Nutshells","authors":"D. Mańko, M. Barczak, A. Zdziennicka","doi":"10.2478/umcschem-2013-0005","DOIUrl":"https://doi.org/10.2478/umcschem-2013-0005","url":null,"abstract":"Abstract Walnut and hazelnut shells were used to prepare activated carbons using potassium hydroxide as an activation agent. The obtained activated carbons presented a specific surface areas of 1661 and 1322 m2/g and pore total volumes of 0.80 and 0.65 cm3/g, respectively. Moreover, the obtained activated carbons presented high quantity of micropores in their structure and that is why they have a great potential for environmental applications and they could be an alternative to commercially available activated carbons from the viewpoint of adsorption capacity. This paper proves that walnut and hazelnut shells have got a large potential as precursors to obtaining activated carbons and they could be successfully converted into a well-developed porous materials by chemical activation.","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"19 1","pages":"51 - 62"},"PeriodicalIF":0.0,"publicationDate":"2014-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86713354","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: 1
An Application of Microemulsion Method for Synthesis of Copper-Zinc Materials 微乳液法在铜锌材料合成中的应用
Annales UMCS, Chemia Pub Date : 2014-10-17 DOI: 10.2478/umcschem-2013-0009
Justyna Pawlonka, G. Słowik, W. Gac, T. Borowiecki
{"title":"An Application of Microemulsion Method for Synthesis of Copper-Zinc Materials","authors":"Justyna Pawlonka, G. Słowik, W. Gac, T. Borowiecki","doi":"10.2478/umcschem-2013-0009","DOIUrl":"https://doi.org/10.2478/umcschem-2013-0009","url":null,"abstract":"Abstract Microemulsion method was used for preparation of copperzinc mixed oxides. Samples were prepared from the solutions containing zinc and copper nitrates. Sodium carbonate was used as a precipitant and hydrazine as reducing agent. Water-in-oil (W/O) microemulsions were formed by the application of cyclohexane, isopropyl alcohol, and hexadecyltrimethylammonium bromide (CTAB) as surfactant. The aim of the studies was determination of the influence of the sequence of synthesis stages on the formation of materials, their surface and structural properties. Thermal decomposition studies of materials were carried out by infrared spectroscopy. The physicochemical properties were characterized by nitrogen adsorption-desorption method, X-ray diffraction (XRD) and temperature-programmed reduction (TPR).","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"2010 1","pages":"107 - 120"},"PeriodicalIF":0.0,"publicationDate":"2014-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86293761","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
Nanoporous Silica-Based Materials for Sorption of Pharmaceuticals and Biomolecules 纳米多孔硅基药物和生物分子吸附材料
Annales UMCS, Chemia Pub Date : 2014-10-17 DOI: 10.2478/umcschem-2013-0001
K. Gdula, M. Barczak
{"title":"Nanoporous Silica-Based Materials for Sorption of Pharmaceuticals and Biomolecules","authors":"K. Gdula, M. Barczak","doi":"10.2478/umcschem-2013-0001","DOIUrl":"https://doi.org/10.2478/umcschem-2013-0001","url":null,"abstract":"Abstract Our concern in this paper is to review four kinds of mesoporous silica materials which can be used as potential sorbents for pharmaceuticals. It is known that a continuous development of science, medicine and food industry has an effect on contamination of the natural environment. Moreover, many impurities, such as drugs, vitamins or proteins etc., which get into environment from urban and hospital wastes, can also influence on human organisms. Thus, there is a need to control an amount of those compounds, especially in the natural waters and wastewaters [1-4]. In this work, we present four types of silica materials which can be helpful in water purification by using adsorption process.","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"5 1","pages":"1 - 12"},"PeriodicalIF":0.0,"publicationDate":"2014-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72882448","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
Positronium as a probe of small free volumes in crystals, polymers and porous media 正电子离子在晶体、聚合物和多孔介质中的小自由体积探针
Annales UMCS, Chemia Pub Date : 2014-01-01 DOI: 10.2478/UMCSCHEM-2013-0012
T. Goworek
{"title":"Positronium as a probe of small free volumes in crystals, polymers and porous media","authors":"T. Goworek","doi":"10.2478/UMCSCHEM-2013-0012","DOIUrl":"https://doi.org/10.2478/UMCSCHEM-2013-0012","url":null,"abstract":"Abstract Positronium (a hydrogen-like bound state of an electron and a positron) is a convenient probe to determine the sizes of subnanometric free volumes (voids) in condensed matter. A review of experimental methods used in positron spectroscopy and examples of their application to the free volume studies are presented.","PeriodicalId":7937,"journal":{"name":"Annales UMCS, Chemia","volume":"614 1","pages":"1 - 110"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80430773","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: 26
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