Crystal structure, theoretical studies and luminescent properties of a new borate Na3GdB8O15 with one-dimensional broad-banded anionic framework

2020 ◽  
Vol 49 (37) ◽  
pp. 13167-13175
Author(s):  
Dan Zhao ◽  
Ya-Nan Li ◽  
Yan-Ping Fan ◽  
Bao-Zhong Liu ◽  
Shi-Rui Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Blue Light ◽  
Uv Radiation ◽  
Luminescent Properties ◽  
Chain Structure ◽  
Theoretical Studies ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Anionic Framework

A new polyborate Na3GdB8O15 with one-dimensional chain structure was prepared, and Gd3+ can be substituted by Ce3+ to realize the blue light luminescence by a near-UV radiation excitation.

Crystal Structure of Na(I) Complex with 1,5-Naphthalenedisulfonate

2013 ◽  
Vol 830 ◽  
pp. 185-188
Author(s):  
Li Hua Wang ◽  
Zhi Xiang Ji
Keyword(s):  
Crystal Structure ◽  
Chain Structure ◽  
Water Molecules ◽  
Local Geometry ◽  
Dimensional Chain ◽  
Single Crystal Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
Octahedral Environment ◽  
Distorted Octahedral

A new Na (I) complex, [Na (H2O)5(DMF)]·(L) (L=1,5-naphthalenedisulfonate) has been obtained in the CH3CH2OH and a little DMF solution. The complex was characterized by X-ray single crystal diffraction analysis. The results showed that the local geometry around central Na (I) ion can be described a distorted octahedral environment which connected by five water molecules and one DMF molecule. The complex formed one dimensional chain structure through intramolecule and intermolecule hydrogen bonds and π-π stacking.

Synthesis, Crystal Structure and Antibacterial Activity of 1D Chain Ca(II) Coordination Polymer

2011 ◽  
Vol 282-283 ◽  
pp. 96-99
Author(s):  
Xi Shi Tai
Keyword(s):  
Crystal Structure ◽  
Antibacterial Activity ◽  
Coordination Polymer ◽  
Chain Structure ◽  
Molar Conductance ◽  
Dimensional Chain ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
1D Chain

1D chain Ca(II) coordination polymer was synthesized and characterized by elemental analysis, molar conductance, IR and single-crystal X-ray diffraction, The results of crystal structure show that each Ca(II) ion forms eight-coordinated and the complex formed one dimensional chain structure by the oxygen atoms of carboxylate and water bridged. The antibacterial activity of the Ca(II) coordination polymer and the ligand were tested, the results show that the complex show considerable antibacterial activity against escherichia coli, bacillus subtilis and staphylococcus white.

catena-Poly[[[aquasilver(I)]-μ-2,3-dimethylpyrazine-κ2 N:N′] 4-amino-2,5-dichlorobenzenesulfonate]

2007 ◽  
Vol 63 (11) ◽  
pp. m2734-m2735
Author(s):  
Hai-Yan Liu ◽  
Ji-Cheng Ma ◽  
Jin Yang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chain Structure ◽  
Planar Geometry ◽  
Dimensional Chain ◽  
Two Dimensional ◽  
One Dimensional ◽  
Dimensional Network ◽  
Charge Balancing

In the title compound, {[Ag(C6H8N2)(H2O)](C6H4Cl2NO3S)} n , the AgI ion is three-coordinated by two N atoms from two symmetry-related 2,3-dimethylpyrazine (dmp) ligands, and one water O atom in a distorted trigonal–planar geometry. The dmp ligands bridge AgI ions to form a one-dimensional chain structure with charge-balancing 4-amino-2,5-dichlorobenzenesulfonate anions. In the crystal structure, intermolecular O—H...O and N—H...O hydrogen bonds form a two-dimensional network.

Bis(1H-benzimidazole-κN 3)bis(naphthalene-2-acetato-κ2 O,O′)cadmium(II) monohydrate

2007 ◽  
Vol 63 (3) ◽  
pp. m692-m694 ◽  
Author(s):  
Ji-Guo Duan ◽  
Ji-Wei Liu ◽  
Song Wu
Keyword(s):  
Crystal Structure ◽  
Rotation Axis ◽  
Chain Structure ◽  
Mononuclear Complex ◽  
Stacking Interactions ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Solvent Water ◽  
Trigonal Prismatic Coordination ◽  
Trigonal Prismatic

The CdII ion of the title mononuclear complex, [Cd(C12H9O2)2(C7H6N2)2]·H2O, lies on a crystallographic twofold rotation axis and is in a distorted trigonal prismatic coordination enivironment, involving four carboxylate O atoms from two chelating naphthaleneacetate ligands and two N atoms from two benzimidazole ligands. In the crystal structure, intermolecular N—H...O hydrogen bonds and π–π stacking interactions give rise to a one-dimensional chain structure. The solvent water molecule also lies on a crystallographic twofold rotation axis.

Synthesis and Crystal Structure of 17-Allyl-4,5-anhydro-7α-[(R)-1-hydroxy-1-methyl-3-(2-thienyl)propyl]-6-methoxy-6,14-ethanomorphinan-3,4,5-triol

2005 ◽  
Vol 70 (2) ◽  
pp. 237-246
Author(s):  
He Liu ◽  
Jingyan Wang ◽  
Bohua Zhong
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Nmr Spectra ◽  
Chain Structure ◽  
Equatorial Position ◽  
Dimensional Chain ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
One Dimensional ◽  
X Ray

17-Allyl-4,5-anhydro-7α-[(R)-1-hydroxy-1-methyl-3-(2-thienyl)propyl]-6-methoxy-6,14-ethanomorphinan-3,4,5-triol (thienorphine 6) was synthesized and structurally characterized by NMR spectra, ESI-MS and X-ray diffraction. The crystal structure indicates that thienorphine maintained the main rigid structure of morphine while containing the C6-C14 ethano bridge. The allyl group is located in the equatorial position as expected. The packing diagram of 6 showed the presence of intramolecular and intermolecular O-H···O hydrogen bonds linking the molecules into a zigzag infinite quasi-one-dimensional chain structure.

scholarly journals Dehydration mechanism of Ciprofloxacin Hydrochloride hydrate crystal

2014 ◽  
Vol 70 (a1) ◽  
pp. C1572-C1572
Author(s):  
Okky Putra ◽  
Ryosuke Toyoshima ◽  
Slamet Ibrahim ◽  
Hidehiro Uekusa
Keyword(s):  
Crystal Structure ◽  
Molecular Conformation ◽  
Environmental Changes ◽  
Color Change ◽  
Chain Structure ◽  
Dimensional Chain ◽  
Ciprofloxacin Hydrochloride ◽  
Hydrate Form ◽  
One Dimensional ◽  
Mechanistic Investigation

Active pharmaceutical ingredients (APIs) often exist in different crystalline forms such as hydrate and polymorph, which show different pharmaceutically important physicochemical properties such as crystal color, solubility, stability, dissolution rate and bioavailability. Moreover, crystalline phase transformation is induced by environmental changes such as heating and humidity. Thus, mechanistic investigation based on crystal structures is essential. Ciprofloxacin Hydrochloride (CIP) is fluoroquinolone antimicrobials with potent activity against a broad spectrum of bacteria. From TG/DTA and XRD-DSC measurement, the sesqui-hydrate form dehydrates to anhydrate form I at 140 °C and then transforms to another anhydrate form II at 172 °C. The single crystals of sesqui-hydrate form and anhydrous II were obtained by recrystallization from water and methanol, respectively. However, anhydrate I could not be obtained as single crystal, so the powder crystal form was accomplished by dehydration of hydrate form at 140 °C at vacuum heating condition, and the crystal structure was analyzed by ab-initio powder crystal structure analysis technique using synchrotron X-ray diffraction data. The crystal structure of anhydrous form I was partly related to the hydrate in the packing, i.e., both show one-dimensional chain and two-dimensional sheet structure. However, in anhydrous II, only one-dimensional chain structure was retained. Interestingly, the colors of powder crystal of hydrate and anhydrate I were white, meanwhile, anhydrate II appeared as yellow crystalline powder. The color changes may be explained from their molecular conformation . The torsion angle between flouroquinolone and piperazine of hydrate, anhydrate form I (white) and anhydrate form II (yellow) was 145.71°, 136.28° and 108.65°, respectively. Thus, the large difference in anhydrate II might affect the conjugation in aromatic group slightly and resulted in the color change.

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