scholarly journals Different Molecular Interaction between Collagen and α- or β-Chitin in Mechanically Improved Electrospun Composite

Marine Drugs ◽  
2019 ◽  
Vol 17 (6) ◽  
pp. 318 ◽  
Author(s):  
Hyunwoo Moon ◽  
Seunghwan Choy ◽  
Yeonju Park ◽  
Young Mee Jung ◽  
Jun Mo Koo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Tensile Strength ◽  
Regenerative Medicine ◽  
Hydrogen Bonds ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Molecular Hydrogen ◽  
Correlation Spectroscopy ◽  
Two Dimensional ◽  
Secondary Interaction

Although collagens from vertebrates are mainly used in regenerative medicine, the most elusive issue in the collagen-based biomedical scaffolds is its insufficient mechanical strength. To solve this problem, electrospun collagen composites with chitins were prepared and molecular interactions which are the cause of the mechanical improvement in the composites were investigated by two-dimensional correlation spectroscopy (2DCOS). The electrospun collagen is composed of two kinds of polymorphs, α- and β-chitin, showing different mechanical enhancement and molecular interactions due to different inherent configurations in the crystal structure, resulting in solvent and polymer susceptibility. The collagen/α-chitin has two distinctive phases in the composite, but β-chitin composite has a relatively homogeneous phase. The β-chitin composite showed better tensile strength with ~41% and ~14% higher strength compared to collagen and α-chitin composites, respectively, due to a favorable secondary interaction, i.e., inter- rather than intra-molecular hydrogen bonds. The revealed molecular interaction indicates that β-chitin prefers to form inter-molecular hydrogen bonds with collagen by rearranging their uncrumpled crystalline regions, unlike α-chitin.

Crystallographic characterization of a novel spiro-[chroman-chromene]-carboxylate

2017 ◽  
Vol 10 (2) ◽  
pp. 170-174
Author(s):  
Viktor Vrábel ◽  
Július Sivý ◽  
Ľubomír Švorc ◽  
Jan Světlík ◽  
Štefan Marchalín
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Hydrogen Bonds ◽  
Molecular Interactions ◽  
Chair Conformation ◽  
Heterocyclic Ring ◽  
Two Dimensional ◽  
Dimensional Network ◽  
Crystal And Electronic Structure

AbstractWe report here the crystal and electronic structure of a new spiro-derivative, namely methyl (2R,4S)- 4-(benzothiazol-2-ylamino)-8,8´-dimethoxyspiro[chroman-2,2´-chromene]-3´-carboxylate (I), C28H24N2O6S, which crystallizes as racemate in the space group C2/c. In this compound, the chromanone moiety consists of a benzene ring fused with a six-membered heterocyclic ring which adopts a distorted half-chair conformation. The molecules are linked by a combination of N-H∙∙∙N hydrogen bonds and weak C-H∙∙∙O, C-H∙∙∙S, C-H∙∙∙ π, inter- and intra-molecular interactions resulting in a two-dimensional network in the crystal structure.

scholarly journals Crystal structure of 2-nitro-N-(5-nitro-1,3-thiazol-2-yl)benzamide

2014 ◽  
Vol 70 (12) ◽  
pp. o1252-o1252 ◽  
Author(s):  
Rodolfo Moreno-Fuquen ◽  
Diego F. Sánchez ◽  
Javier Ellena
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Two Dimensional ◽  
Compound C ◽  
Dimensional Network ◽  
Benzene Rings ◽  
The Mean ◽  
Amide Fragment

In the title compound, C10H6N4O5S, the mean plane of the non-H atoms of the central amide fragment C—N—C(=O)—C [r.m.s. deviation = 0.0294 Å] forms dihedral angles of 12.48 (7) and 46.66 (9)° with the planes of the thiazole and benzene rings, respectively. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming chains along [001]. In addition, weak C—H...O hydrogen bonds link these chains, forming a two-dimensional network, containingR44(28) ring motifs parallel to (100).

scholarly journals Crystal structure of the new hybrid material bis(1,4-diazoniabicyclo[2.2.2]octane) di-μ-chlorido-bis[tetrachloridobismuthate(III)] dihydrate

2015 ◽  
Vol 71 (11) ◽  
pp. 1384-1387
Author(s):  
Marwen Chouri ◽  
Habib Boughzala
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Hydrogen Bonds ◽  
Room Temperature ◽  
Molar Ratio ◽  
Water Molecules ◽  
Site Symmetry ◽  
Two Dimensional ◽  
Slow Evaporation ◽  
Solution Ph

The title compound bis(1,4-diazoniabicyclo[2.2.2]octane) di-μ-chlorido-bis[tetrachloridobismuthate(III)] dihydrate, (C6H14N2)2[Bi2Cl10]·2H2O, was obtained by slow evaporation at room temperature of a hydrochloric aqueous solution (pH = 1) containing bismuth(III) nitrate and 1,4-diazabicyclo[2.2.2]octane (DABCO) in a 1:2 molar ratio. The structure displays a two-dimensional arrangement parallel to (100) of isolated [Bi2Cl10]4−bioctahedra (site symmetry -1) separated by layers of organic 1,4-diazoniabicyclo[2.2.2]octane dications [(DABCOH2)2+] and water molecules. O—H...Cl, N—H...O and N—H...Cl hydrogen bonds lead to additional cohesion of the structure.

scholarly journals Crystal structure and Hirshfeld surface analysis of a copper(II) complex containing 2-nitrobenzoate and tetramethylethylenediamine ligands

2021 ◽  
Vol 77 (4) ◽  
pp. 412-415
Author(s):  
Sevgi Kansiz ◽  
Adnan M. Qadir ◽  
Necmi Dege ◽  
Li Yongxin ◽  
Eiad Saif
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Basic Solution ◽  
Two Dimensional ◽  
Nitrobenzoic Acid ◽  
Intermolecular Contacts ◽  
Additional Stabilization

The reaction of copper(II) sulfatepentahydrate with 2-nitrobenzoic acid and N,N,N′,N′-tetramethylethylenediamine (TMEDA) in basic solution produces the complex bis(2-nitrobenzoato-κO)(N,N,N′,N′-tetramethylethylenediamine-κ2 N,N′)copper(II), [Cu(C7H4NO4)2(C6H16N2)] or [Cu(2-nitrobenzoate)2(tmeda)]. Each carboxylate group of the 2-nitrobenzoate ligand is coordinated by CuII atom in a monodentate fashion and two TMEDA ligand nitrogen atoms are coordinate by the metal center, giving rise to a distorted square-planar coordination environment. In the crystal, metal complexes are linked by centrosymmetric C—H...O hydrogen bonds, forming ribbons via a R 2 2(10) ring motif. These ribbons are linked by further C—H...O hydrogen bonds, leading to two-dimensional hydrogen-bonded arrays parallel to the bc plane. Weak π–π stacking interactions provide additional stabilization of the crystal structure. Hirshfeld surface analysis, dnorm and two-dimensional fingerprint plots were examined to verify the contributions of the different intermolecular contacts within the supramolecular structure. The major interactions of the complex are O...H/H...O (44.9%), H...H (34%) and C...H (14.5%).

scholarly journals Molecular interaction balanced one- and two-dimensional hybrid nanoarchitectures for high-performance supercapacitors

2019 ◽  
Vol 21 (40) ◽  
pp. 22283-22292 ◽  
Author(s):  
Mingxia Lu ◽  
Gang Wang ◽  
Bo Li ◽  
Jing Chen ◽  
Jingchao Zhang ◽  
...  
Keyword(s):  
Molecular Interactions ◽  
Self Assembly ◽  
Molecular Interaction ◽  
High Performance ◽  
Charge Storage ◽  
Two Dimensional ◽  
Assembly Process ◽  
Equilibrium Thermodynamic ◽  
Good Separation ◽  
Ratio Dependent

Stepwise ultrasonication and self-assembly process enables good separation between disequilibrium and equilibrium thermodynamic molecular interactions, which allow excellent electrochemical charge storage based on ratio-dependent 1D–2D hybridisation.

scholarly journals Crystal structure of 4-azidomethyl-6-isopropyl-2H-chromen-2-one

2015 ◽  
Vol 71 (4) ◽  
pp. o227-o228 ◽  
Author(s):  
M. S. Krishnamurthy ◽  
Noor Shahina Begum ◽  
D. Shamala ◽  
K. Shivashankar
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Ring System ◽  
Maximum Deviation ◽  
Two Dimensional ◽  
Π Interactions ◽  
Dimensional Network ◽  
Title Molecule

In the title molecule, C13H13N3O2, the benzopyran ring system is essentially planar, with a maximum deviation of 0.017 (1) Å. In the crystal, weak C—H...O hydrogen bonds link molecules into ladders along [010]. In addition, π–π interactions between inversion-related molecules, with centroid–centroid distances in the range 3.679 (2)–3.876 (2) Å, complete a two-dimensional network parallel to (001).

N′-(2-Methoxythiobenzoyl)pyridine-2-carbohydrazide

2006 ◽  
Vol 62 (4) ◽  
pp. o1405-o1407
Author(s):  
N. K. Singh ◽  
Ray J Butcher ◽  
Pratibha Tripathi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Two Dimensional ◽  
Compound C

In the crystal structure of the title compound, C14H13N3O2S, intermolecular N—H...·O (H...O = 2.03 Å) and C—H...S (H...S = 2.77 Å) hydrogen bonds link molecules into a two-dimensional framework.

scholarly journals Crystal structure of 2-methylpiperazine-1,4-diium bis(hydrogen maleate)

2015 ◽  
Vol 71 (3) ◽  
pp. o193-o194
Author(s):  
Intissar Wecharine ◽  
Arto Valkonen ◽  
Mohamed Rzaigui ◽  
Wajda Smirani Sta
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Layered Structures ◽  
Two Dimensional ◽  
Asymmetric Unit

In the title salt, C5H14N22+·2C4H3O4−, the asymmetric unit contains two independent 2-methylpiperazinium dications, which comprise a racemic pair, and four hydrogen maleate monoanions. In the roughly planar hydrogen maleate anions, intramolecular O—H...O hydrogen bonds generateS(7) rings. In the crystal, the four independent anions are linked to the 2-methylpiperazinium cations through N—H...O hydrogen bonds, forming two-dimensional layered structures lying parallel to (001).

scholarly journals Weak C—H...X(X= O, N) hydrogen bonds in the crystal structure of dihydroberberine

2014 ◽  
Vol 70 (4) ◽  
pp. 388-391 ◽  
Author(s):  
Subramanya Pingali ◽  
James P. Donahue ◽  
Florastina Payton-Stewart
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Crystalline State ◽  
Ring System ◽  
Reduced Form ◽  
Two Dimensional ◽  
Partial Saturation ◽  
Type C

Dihydroberberine (systematic name: 9,10-dimethoxy-6,8-dihydro-5H-1,3-dioxolo[4,5-g]isoquinolino[3,2-a]isoquinoline), C20H19NO4, a reduced form of pharmacologically important berberine, crystallizes from ethanol without interstitial solvent. The molecule shows a dihedral angle of 27.94 (5)° between the two arene rings at the ends of the molecule, owing to the partial saturation of the inner quinolizine ring system. Although lacking classical O—H or N—H donors, the packing in the crystalline state is clearly governed by C—H...N and C—H...O hydrogen bonds involving the two acetal-type C—H bonds of the 1,3-dioxole ring. Each dihydroberberine molecule is engaged in four hydrogen bonds with neighbouring molecules, twice as donor and twice as acceptor, thus forming a two-dimensional sheet network that lies parallel to the (100) plane.

2′-(1H-Indol-3-ylmethylene)isonicotinohydrazide ethanol solvate

2006 ◽  
Vol 62 (4) ◽  
pp. o1360-o1361 ◽  
Author(s):  
Zuo-Liang Jing ◽  
Wen-Wen Cheng ◽  
Xin Chen ◽  
Yu Ming
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Two Dimensional ◽  
Compound C ◽  
Dimensional Network ◽  
Ethanol Solvate

In the crystal structure of the title compound, C15H12N4O·C2H6O, molecules are linked via weak intermolecular N—H...N, O—H...O and N—H...O hydrogen bonds, forming a two-dimensional network.

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