Comparison of IR Spectroscopic Analysis and X‐Ray Diffraction of Aluminum Hydroxide Gel

Single crystals of Li-acetylacetonate (Li-acac) were characterised by microscopical, IR-reflection and X-ray diffraction measurements.The space group was found to be C cca (orthorhombic). From the IR-spectra (polarised radiation) and the properties of the space group the probable arrangements of the molecular species in the crystal are deduced.

Download Full-text

Comparative Spectroscopic Analysis of Maya Wall Paintings from Ek’Balam, Mexico

MRS Proceedings ◽

10.1557/opl.2014.455 ◽

2014 ◽

Vol 1618 ◽

pp. 63-72 ◽

Cited By ~ 1

Author(s):

A. Alonso ◽

N. A. Pérez ◽

J. L. Ruvalcaba Sil ◽

E. Casanova ◽

P. Claes ◽

...

Keyword(s):

Spectroscopic Analysis ◽

Analytical Techniques ◽

Archaeological Site ◽

X Ray Diffraction ◽

X Ray ◽

Non Invasive ◽

Yellow Orange ◽

Pigment Distribution ◽

The Rich ◽

Invasive Techniques

ABSTRACTThe Maya archaeological site of Ek’Balam is located in Yucatán, Mexico. This place is known for its artistic tradition of reliefs modeled in stucco as well as the rich pictorial and hieroglyphic texts. Although the mural played a key role in the artistic program architectural of elite groups, most of these remains have not been studied, either by its incomplete or fragile condition, or by localization in inaccessible substructures.In this study, technical aspects of the mural paintings from rooms 12 and 50 of the main building of the site are addressed by the spectroscopic analysis of its materials. Optical microscopy was used to observe the layers superposition and pigment distribution, while the stucco and rock support were characterized by X-ray Diffraction (XRD) and X-ray Fluorescence (XRF). Moreover, the chromatic palette composed of different colors and tones of red, yellow, orange, green, blue and black were analyzed mainly with non-invasive techniques using Raman and FTIR spectroscopies as well as XRF.The information obtained from the combination of these analytical techniques, allowed a better understanding of the similarities and differences between these two rooms that were built during the last construction stage of the Acropolis. These results were also compared with previous analyses of mural painting of this site and other Maya paintings.

Download Full-text

Conversion of fisheries waste as magnetic hydroxyapatite bionanocomposite for the removal of heavy metals from groundwater

Water Science & Technology Water Supply ◽

10.2166/ws.2017.211 ◽

2017 ◽

Vol 18 (4) ◽

pp. 1406-1419

Author(s):

F. Elmi ◽

R. Chenarian Nakhaei ◽

H. Alinezhad

Keyword(s):

Heavy Metals ◽

Freundlich Isotherm ◽

Spectroscopic Techniques ◽

Order Kinetic ◽

Fish Scale ◽

X Ray Diffraction ◽

X Ray ◽

Removal Of Heavy Metals ◽

Order Kinetic Model ◽

Ir Spectroscopic

Abstract This study is the first report of its type demonstrating the synthesis of mHAP on the basis of magnetic functionalization with nHAP, which were synthesized using Rutilus frisii kutum fish scale as a benign fishery waste by-product. The mHAP was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray diffraction (EDX), and Fourier transform infrared (FT-IR) spectroscopic techniques. The XRD pattern confirmed the formation of a single-phase nHAP without any extra steady phases. It was also found that the pseudo-second-order kinetic model gave a satisfactory fit to the experimental data (R2 = 0.99). The maximum removal percentages of Cu and Zn ions in optimal conditions (adsorbent dosage at 0.1 g, 30 min contact time at 25 ± 1 °C and pH = 5 ± 0.1) by mHAP were 97.1% and 93.8%, respectively. Results also demonstrated that mHAP could be recycled for up to five cycles in the case of copper and zinc. The Langmuir isotherm was proved to have a better correlation compared with that of the Freundlich isotherm. The thermodynamic parameters indicated that it was a spontaneously endothermic reaction. In conclusion, mHAP could be regarded as a powerful candidate for efficient biosorbent, capable of adsorbing heavy metals from aqueous solutions.

Download Full-text

A New Binuclear Lutetium(III) Dimethyl-N-trichloroacetylamidophosphate Complex with a γ, γ'-Dipyridyl Bridge, {Lu[CCl3C(O)NP(O)(OCH3)2]3}2-μ(γ,γ'-dipy)

Zeitschrift für Naturforschung B ◽

10.1515/znb-2001-0306 ◽

2001 ◽

Vol 56 (3) ◽

pp. 249-254 ◽

Cited By ~ 8

Author(s):

Victor A. Trush ◽

Jolanta Swiatek-Kozlowska ◽

Victor V. Skopenko ◽

Vladimir M. Amyrkhanov

Keyword(s):

Crystal And Molecular Structure ◽

Carbonyl Oxygen ◽

Carbonyl Groups ◽

X Ray Diffraction ◽

Triclinic Space Group ◽

Metal Centers ◽

X Ray ◽

Heterocyclic Ligand ◽

New Type ◽

Ir Spectroscopic

Abstract A new type of binuclear coordination compound of lutetium, {Lu2L6 · μ-(γ,γ '-dipy)} (where L = dimethyl-N-trichloroacetylamidophosphate anion and γ,γ '-dipy = 4,4'-dipyridyl), has been obtained. The IR spectroscopic data reveal that the ambidentate phosphoryl ligand is coordinated to the metal center in a bidentate manner via the phosphoryl and carbonyl oxygen atoms. The crystal and molecular structure of {Ln2L6-μ-(γ ,γ '-dipy)} has been determined by means of X-ray diffraction (triclinic, space group P i with parameters: a = 9.259(2), b = 12.530(3), c = 16.548(3) Å, α = 85.44(3)°, β = 75.64(3)°, γ = 70.56(3)°, Z = 1). The structure is made up of centrosymmetric binuclear molecules, in which the neutral heterocyclic ligand is coordinated to the metal centers in a bidentate bridging manner via its nitrogen atoms. The coordination number of each Lu(III) atom is 7 [60(L-) + N((γ ,γ '-dipy)]. Phosphoryl and carbonyl groups of the L- ligands are disposed in syn-position and are included in the six-membered chelate metallocycles. The coordination polyhedron of lutetium can be described as distorted mono-capped octahedron.

Download Full-text

Structural and IR-spectroscopic characterization of magnesium acesulfamate

Zeitschrift für Naturforschung B ◽

10.1515/znb-2015-0132 ◽

2016 ◽

Vol 71 (1) ◽

pp. 51-55 ◽

Cited By ~ 3

Author(s):

Oscar E. Piro ◽

Gustavo A. Echeverría ◽

Beatriz S. Parajón-Costa ◽

Enrique J. Baran

Keyword(s):

Crystal Structure ◽

Aqueous Solution ◽

Elemental Analysis ◽

Spectroscopic Characterization ◽

Magnesium Carbonate ◽

X Ray Diffraction ◽

Triclinic Space Group ◽

X Ray ◽

Ir Spectroscopic

AbstractMagnesium acesulfamate, Mg(C4H4NO4S)2·6H2O, was prepared by the reaction of acesulfamic acid and magnesium carbonate in aqueous solution, and characterized by elemental analysis. Its crystal structure was determined by single crystal X-ray diffraction methods. The substance crystallizes in the triclinic space group P1̅ with one molecule per unit cell. The FTIR spectrum of the compound was also recorded and is briefly discussed. Some comparisons with other simple acesulfamate and saccharinate salts are also made.

Download Full-text

A Novel Methylene Dithioether as a Ligand: Synthesis and Molecular Structure of a Zinc(II) Complex with N4S2 Coordination Environment

Zeitschrift für Naturforschung B ◽

10.1515/znb-2003-1016 ◽

2003 ◽

Vol 58 (10) ◽

pp. 1027-1029 ◽

Cited By ~ 2

Author(s):

F. Ekkehardt Hahn ◽

Christoph Jocher ◽

Henning Schröder

Keyword(s):

Molecular Structure ◽

Diffraction Study ◽

Aluminum Hydroxide ◽

Zinc Atom ◽

X Ray Diffraction ◽

Coordination Environment ◽

X Ray ◽

Octadentate Ligand ◽

Ligand Synthesis ◽

Perchlorate Hexahydrate

The octadentate ligand [N(CH2CH2NH2)(CH2CH2CH2OH)(CH2CH2S)]2CH2, (NNOS-232)2CH2, was synthesized accidentally by the reaction of the unsymmetrically substituted tripod [N(CH2CH2NH2)(CH2CH2CH2OH)(CH2CH2SH)], NNOS-232, with dichloromethane in the presence of aluminum hydroxide. Ligand (NNOS-232)2CH2 was reacted with zinc bis(perchlorate) hexahydrate to yield the complex [Zn((NNOS-232)2CH2)](ClO4)2 1 exhibiting a distorted octahedrally coordinated zinc atom in an N4S2 coordination environment, as shown by an X-ray diffraction study.

Download Full-text

Nanangenines: drimane sesquiterpenoids as the dominant metabolite cohort of a novel Australian fungus, Aspergillus nanangensis

Beilstein Journal of Organic Chemistry ◽

10.3762/bjoc.15.256 ◽

2019 ◽

Vol 15 ◽

pp. 2631-2643 ◽

Cited By ~ 5

Author(s):

Heather J Lacey ◽

Cameron L M Gilchrist ◽

Andrew Crombie ◽

John A Kalaitzis ◽

Daniel Vuong ◽

...

Keyword(s):

Mammalian Cells ◽

Biosynthetic Pathway ◽

Spectroscopic Analysis ◽

Bioinformatics Analysis ◽

Biosynthetic Gene Cluster ◽

In Vitro Activity ◽

X Ray Diffraction ◽

X Ray ◽

Drimane Sesquiterpenoids

Chemical investigation of an undescribed Australian fungus, Aspergillus nanangensis, led to the identification of the nanangenines – a family of seven new and three previously reported drimane sesquiterpenoids. The structures of the nanangenines were elucidated by detailed spectroscopic analysis supported by single crystal X-ray diffraction studies. The compounds were assayed for in vitro activity against bacteria, fungi, mammalian cells and plants. Bioinformatics analysis, including comparative analysis with other acyl drimenol-producing Aspergilli, led to the identification of a putative nanangenine biosynthetic gene cluster that corresponds to the proposed biosynthetic pathway for nanangenines.

Download Full-text

Improved Flame-Retardant and Ceramifiable Properties of EVA Composites by Combination of Ammonium Polyphosphate and Aluminum Hydroxide

Polymers ◽

10.3390/polym11010125 ◽

2019 ◽

Vol 11 (1) ◽

pp. 125 ◽

Cited By ~ 15

Author(s):

Feipeng Lou ◽

Kai Wu ◽

Quan Wang ◽

Zhongyu Qian ◽

Shijuan Li ◽

...

Keyword(s):

Flame Retardant ◽

Aluminum Hydroxide ◽

Sintering Temperature ◽

Ethylene Vinyl Acetate ◽

Ammonium Polyphosphate ◽

X Ray Diffraction ◽

X Ray ◽

Melt Compounding ◽

Alumina Trihydrate ◽

Strength Improvement

Ceramifiable flame-retardant ethylene-vinyl acetate (EVA) copolymer composites for wire and cable sheathing materials were prepared through melt compounding with ammonium polyphosphate (APP), aluminum hydroxide (ATH) and fluorophlogopite mica as the addition agents. The effects of ammonium polyphosphate, alumina trihydrate, and APP/ATH hybrid on the flame retardant, as well as on the thermal and ceramifiable properties of EVA composites, were investigated. The results demonstrated that the composites with the ratio of APP:ATH = 1:1 displayed the best flame retardancy and the greatest char residues among the various EVA composites. The tensile strength of the composites was 6.8 MPa, and the residue strength sintered at 1000 °C reached 5.2 MPa. The effect of sintering temperature on the ceramifiable properties, microstructures, and crystalline phases of the sintered specimen was subsequently investigated through X-ray diffraction, Fourier transform infrared, and scanning electron microscopy. The XRD and FTIR results demonstrated that the crystal structure of mica was disintegrated, while magnesium orthophosphate (Mg3(PO4)2) was simultaneously produced at an elevated temperature, indicating that the ceramization of EVA composites had occurred. The SEM results demonstrated that a more continuous and compact microstructure was produced with the rise in the sintering temperature. This contributed to the flexural strength improvement of the ceramics.

Download Full-text

Preparation and Characterization the Cheap Mineral (Calcium Compound): The Preliminary Survey in the Natural Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.770.303 ◽

2013 ◽

Vol 770 ◽

pp. 303-306

Author(s):

A. Montree ◽

K. Teanchai ◽

Wichian Siriprom

Keyword(s):

Molecular Composition ◽

Natural Material ◽

X Ray Diffraction ◽

X Ray ◽

Conventional Analysis ◽

Calcium Compound ◽

Egg Shells ◽

Ft Ir ◽

Ir Study ◽

Ir Spectroscopic

The present work reports the production of biomaterial, while the potential in bio mineralization were studied with three conventional analysis techniques, X-Ray Diffraction (XRD) were confirm the crystal structure, Energy Dispersive X-Ray Fluorescence (EDXRF) and Fourier Transform Infrared Spectroscopy (FT-IR) study trace element and molecular composition, respectively. The results of XRD reveal that, the egg shells have a crystalline of calcium carbonate in phase calcite and fishbone have a crystalline of calcium phosphate in phase hydroxyapatite, respectively. The composition of both mineral and the level of metals element were investigated by EDXRF. The major composition was identified as Calcium (Ca) and other element are Potassium (K), Phosphorus (P) Sulfur (Al), Zinc (Zn), Ferrum (Fe), Copper (Cu) and Strontium (Sr). In addition, the deeply investigate molecular composition both mineral used using FT-IR spectroscopic analysis.

Download Full-text