Preparation and characterization of the three-dimensional network mullite porous fibrous materials by pressure and freeze-casting method

In this study, hydroxyapatite nanoparticles containing 10% doxycycline, a structural isomer of tetracycline, was prepared by the co-precipitation method. It was added to collagen solution for the preparation of the scaffold with freeze-casting method in order to develop a composite scaffold with both antibacterial and osteoinductive properties for repairing bone defects. The scaffolds were evaluated regarding their morphology, porosity, degradation and cellular response. The scaffolds for further investigation were added in a rat calvaria defect model. The study showed that after eight weeks, the bone formation was relatively higher in the collagen/nano-hydroxyapatite/doxycycline group with completely filled defect when compared with other groups. Histopathological evaluation showed that the defect in the collagen/nano-hydroxyapatite/doxycycline group was fully replaced by the new bone and connective tissue. Our results provide evidence supporting the possible applicability of doxycycline-containing scaffolds for successful bone regeneration.

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Synthesis and structural characterization of hexa-μ2-chlorido-μ4-oxido-tetrakis{[4-(phenylethynyl)pyridine-κN]copper(II)} dichloromethane monosolvate

Acta Crystallographica Section E Crystallographic Communications ◽

10.1107/s2056989020015935 ◽

2021 ◽

Vol 77 (1) ◽

pp. 42-46

Author(s):

Rayya A. Al Balushi ◽

Muhammad S. Khan ◽

Md. Serajul Haque Faizi ◽

Ashanul Haque ◽

Kieran Molloy ◽

...

Keyword(s):

Molecular Structure ◽

Crystal Structure ◽

Structural Characterization ◽

Title Compound ◽

Three Dimensional ◽

Hirshfeld Surface ◽

The Core ◽

Dimensional Network ◽

Packing Arrangement

In the crystal structure of the title compound, [Cu4Cl6O(C13H9N)4]·CH2Cl2, the core molecular structure consists of a Cu4 tetrahedron with a central interstitial O atom. Each edge of the Cu4 tetrahedron is bridged by a chlorido ligand. Each copper(II) cation is coordinated to the central O atom, two chlorido ligands and one N atom of the 4-phenylethynylpyridine ligand. In the crystal, the molecules are linked by intermolecular C—H...Cl interactions. Furthermore, C—H...π and π–π interactions also connect the molecules, forming a three-dimensional network. Hirshfeld surface analysis indicates that the most important contributions for the packing arrangement are from H...H and C...H/H...C interactions.

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Synthesis and Characterization of [2-CH3CH2C6H4NH3]6P6O18⋅4H2O

ISRN Materials Science ◽

10.5402/2011/457924 ◽

2011 ◽

Vol 2011 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Houda Marouani ◽

Salem Slayyem Al-Deyab ◽

Mohamed Rzaigui

Keyword(s):

Hydrogen Bonds ◽

Electrostatic Interactions ◽

Three Dimensional ◽

Spectroscopic Studies ◽

Monoclinic System ◽

Dimensional Network ◽

Cell Dimensions ◽

Unit Cell Dimensions ◽

Ir Spectroscopic

Single crystals of [2-CH3CH2C6H4NH3]6P6O18⋅4H2O are synthesized in aqueous solution by the interaction of cyclohexaphosphoric acid and 2-ethylaniline. This compound crystallizes in the monoclinic system with P21/c space group the unit cell dimensions are: a=16.220(4) Å, b=10.220(5) Å, c=20.328(4) Å, β=113.24(3)∘, Z=2, and V=3096.5(18) Å3. The atomic arrangement can be described by layers formed by cyclohexaphosphate anions P6O186− and water molecules connected by hydrogen bonds O–H⋯O. These inorganic layers are developed around bc planes at x=1/2 and are interconnected by the H-bonds created by ammonium groups of organic cations. All the hydrogen bonds, the van der Waals contacts and electrostatic interactions between the different entities give rise to a three-dimensional network in the structure and add stability to this compound. The thermal behaviour and the IR spectroscopic studies of this new cyclohexaphosphate are discussed.

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Synthesis and Structural Characterization of the Mixed Ligand Complex [Cu(Hml)2(Phen)] · 2 H2O (H2ml = 2-Methyllactic Acid)

Zeitschrift für Naturforschung B ◽

10.1515/znb-2003-0122 ◽

2003 ◽

Vol 58 (1) ◽

pp. 151-154 ◽

Cited By ~ 7

Author(s):

Rosa Carballo ◽

Berta Covelo ◽

Ezequiel M. Vázquez-Lópeza ◽

Alfonso Castiñeiras ◽

Juan Niclós

Keyword(s):

Magnetic Measurements ◽

Mixed Ligand Complex ◽

Three Dimensional ◽

Mixed Ligand ◽

Water Molecules ◽

Ligand Complex ◽

X Ray ◽

Dimensional Network ◽

Distorted Octahedral

Abstract A new mixed-ligand complex of copper(II) with 1,10-phenanthroline and 2-methyllactate was prepared. [Cu(HmL)2(phen)] ·2H2O (where HmL = monodeprotonated 2-methyllactic acid) was characterized by elemental analysis, IR, electronic and EPR spectroscopy, magnetic measurements at room temperature, thermogravimetric analysis and X-ray diffractometry. The copper atom is in a tetragonally distorted octahedral environment and the 2-methyllactato ligand is bidentately chelating. The presence of lattice water molecules mediates the formation of a three-dimensional network.

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Effect of the drying on morphology and texture of aerogels and zirconia cryogels

MRS Advances ◽

10.1557/adv.2019.450 ◽

2019 ◽

Vol 4 (64) ◽

pp. 3513-3521

Author(s):

Tzipatly A. Esquivel-Castro ◽

Antonia Martínez-Luévanos ◽

Luis Alfonso García-Cerda ◽

Juan C. Contreras-Esquivel ◽

Pascual Bartolo Pérez ◽

...

Keyword(s):

Drug Delivery ◽

Cetyltrimethylammonium Bromide ◽

Sol Gel ◽

Three Dimensional ◽

Supercritical Drying ◽

Sem Images ◽

Texture Properties ◽

Dimensional Network ◽

Zirconia Aerogel

ABSTRACTDue to their excellent properties, aerogel has attracted the attention of the scientific community to use it in the biomedical area as a drug delivery system. This work reports on the synthesis and characterization of ZrO2 aerogels and cryogels obtained by the sol-gel method. The influence of different cetyltrimethylammonium bromide (CTAB) and the type of drying on structural, morphological and texture properties of ZrO2 aerogels and cryogels was investigated. SEM images reveal that a porous interconnected three-dimensional network was formed into aerogels due to supercritical drying. Zirconia aerogel sample has a specific surface area (SBET) larger than zirconia cryogels. Therefore, our results indicate that zirconia aerogel is an adequate material for applications in drug delivery systems.

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Synthesis and Characterization of the Manganese Borate α-MnB2O4

Zeitschrift für Naturforschung B ◽

10.1515/znb-2011-0903 ◽

2011 ◽

Vol 66 (9) ◽

pp. 882-888

Author(s):

Stephanie C. Neumair ◽

Lukas Perfler ◽

Hubert Huppertz

Keyword(s):

High Pressure ◽

Three Dimensional ◽

Lattice Parameters ◽

Synthesis And Characterization ◽

Manganese Ions ◽

Space Group ◽

Dimensional Network ◽

Oxygen Atoms

The high-pressure manganese borate α-MnB2O4 was synthesized under high-pressure/hightemperature conditions of 6.5 GPa and 1100 ◦C in a modified Walker-type multianvil apparatus. The monoclinic compound is isotypic to α-FeB2O4, CaAl2O4-II, CaGa2O4, andβ -SrGa2O4 crystallizing with eight formula units in the space group P21/c (Z = 8) with the lattice parameters a = 712.1(2), b = 747.1(2), c = 878.8(2) pm, β = 94.1(1)◦, V = 0.466(1) nm3, R1 = 0.0326, and wR2 = 0.0652 (all data). The compound is built up from layers of “sechser” rings of corner-sharing BO4 tetrahedra that are interconnected to a three-dimensional network. The manganese ions are coordinated by seven oxygen atoms and situated in channels along the a axis.

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Preparation and Characterization of 2-Phenoxyethyl(thiophen-2-yl)tellane (C4H3S)TeCH2CH2OC6H5

Zeitschrift für Naturforschung B ◽

10.1515/znb-2006-0112 ◽

2006 ◽

Vol 61 (1) ◽

pp. 61-64

Author(s):

Ludmila Vigo ◽

Raija Oilunkaniemi ◽

Risto S. Laitinen

Keyword(s):

Three Dimensional ◽

Monoclinic Crystal ◽

X Ray ◽

Compound C ◽

Dimensional Network ◽

Cell Dimensions ◽

Weak Hydrogen Bonds ◽

Intermolecular Contacts ◽

Unit Cell Dimensions

The synthesis and structure of (C4H3S)TeCH2CH2OC6H5 (1) (C4H3S = thiophen-2-yl) are reported and compared to those of the analogous selenium compound (C4H3S)SeCH2CH2OC6H5 previously synthesized by our group. The compound was characterized by 1H, 13C{1H}-, and 125Te- NMR spectroscopy as well as by X-ray single crystal crystallography. 1 crystallizes in the monoclinic crystal system, space group P21, with Z = 2, and unit cell dimensions a = 10.618(2) Å , b = 5.357(1) Å , c = 10.684(2) Å , β = 96.57(3)°. The lattice is composed of discrete molecules that are joined together by weak hydrogen bonds into a three-dimensional network. The thiophen-2-yl ring is disordered and shows two alternative orientations with the site occupation factors of 0.70(1) and 0.30(1). All bond parameters are quite normal. The comparison of the lattices in 1 and in its selenium anologue shows that while the closest intermolecular contacts are similar, the packing of the molecules is different.

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Synthesis and structural characterization of two coordination polymers constructed by bis(4-(1H-imidazol-1-yl)phenyl)methanone and 5-(tert-butyl)isophthalate ligands

Zeitschrift für Naturforschung B ◽

10.1515/znb-2018-0197 ◽

2019 ◽

Vol 74 (3) ◽

pp. 261-265 ◽

Cited By ~ 4

Author(s):

Gao-Feng Wang ◽

Shu-Wen Sun ◽

Wei-Bing Wang ◽

Hong Sun ◽

Shao-Fei Song

Keyword(s):

Single Crystal ◽

Coordination Polymers ◽

Weak Interactions ◽

Three Dimensional ◽

X Ray Diffraction ◽

X Ray ◽

Dimensional Network ◽

Elemental Analyses ◽

Solvothermal Methods

AbstractTwo coordination polymers, {[Co(bipmo)(tbip)]·3H2O}n (1) and {[Cd(bipmo)(tbip)]·3H2O}n (2) (bipmo=bis(4-(1H-imidazol-1-yl)phenyl)methanone, H2tbip=5-tert-butylisophthalic acid), were synthesized by solvothermal methods and structurally characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray diffraction. The results from single-crystal X-ray diffraction data indicate that the solid state structures of 1 and 2 consist of metal-aromatic carboxylate layers, which are pillared by weak interactions to generate a three-dimensional network. The topological structures of 1 and 2 are uninodal nets based on 3-connected nodes with the Schläfli symbol of {63}.

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Chemically Responsive Hydrogel Deformation Mechanics: A Review

Molecules ◽

10.3390/molecules24193521 ◽

2019 ◽

Vol 24 (19) ◽

pp. 3521 ◽

Cited By ~ 5

Author(s):

Eanna Fennell ◽

Jacques M. Huyghe

Keyword(s):

Numerical Models ◽

Three Dimensional ◽

Soft Materials ◽

Dimensional Network ◽

Health Products ◽

Deformation Mechanics ◽

Natural Tissue ◽

Responsive Hydrogels ◽

Geometric Surface

A hydrogel is a polymeric three-dimensional network structure. The applications of this material type are diversified over a broad range of fields. Their soft nature and similarity to natural tissue allows for their use in tissue engineering, medical devices, agriculture, and industrial health products. However, as the demand for such materials increases, the need to understand the material mechanics is paramount across all fields. As a result, many attempts to numerically model the swelling and drying of chemically responsive hydrogels have been published. Material characterization of the mechanical properties of a gel bead under osmotic loading is difficult. As a result, much of the literature has implemented variants of swelling theories. Therefore, this article focuses on reviewing the current literature and outlining the numerical models of swelling hydrogels as a result of exposure to chemical stimuli. Furthermore, the experimental techniques attempting to quantify bulk gel mechanics are summarized. Finally, an overview on the mechanisms governing the formation of geometric surface instabilities during transient swelling of soft materials is provided.

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Synthesis and Physico-Chemical Characterization of a New Non-Centrosymmetric Organic Cation Iodate

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v7i2.2360 ◽

2011 ◽

Vol 7 (2) ◽

pp. 1315-1323 ◽

Cited By ~ 2

Author(s):

A.C. Dhiab ◽

W. Smirani Sta ◽

M. Rzaigui

Keyword(s):

Organic Cation ◽

Three Dimensional ◽

Chemical Characterization ◽

Halogen Bonds ◽

Monoclinic System ◽

X Ray ◽

Dimensional Network ◽

Physico Chemical ◽

Graph Set

The synthesis, crystal structure and physico-chemical characterization are presented for the piperazinium bis iodate dihydrate. An X-ray investigation has shown that this compound crystallizes in a non-centrosymmetric monoclinic system, space group Pc with the lattice parameters: a = 8.969 (2) Å, b = 6.027 (3) Å, c = 11.958 (2) Å; V = 612.7 (3) Å3 and Z = 2. The structure was solved from 3546 independent reflexions with R1 = 0.053 and wR2 = 0.130. I…O halogen bonds [R22(4) graph-set motif] range between 2.770 (4) and 3.108 (1) Å and connect neighboring IO-3 anions with each other so as to create a bi-dimensional layer parallel to the (b,c) plane. These layers are interconnected via N−H…O and C−H…O, to the piperazinium dication to generate a three-dimensional network.

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