Syntheses, Structures and Luminescence Properties of Two Cd(II) Complexes Based on 2-((1H-1,2,4-Triazol-1-yl)methyl)-1H-benzimidazole and Aromatic Polycarboxylate Ligands

2012 ◽  
Vol 67 (8) ◽  
pp. 783-790 ◽  
Author(s):  
Xiuxiu Wang ◽  
Xiao Han ◽  
Qiao ◽  
Guanghua Jin ◽  
Xiangru Meng
Keyword(s):  
Room Temperature ◽  
Luminescence Properties ◽  
X Ray Diffraction ◽  
Trans Conformation ◽  
X Ray ◽  
Carboxylate Groups ◽  
Benzenedicarboxylic Acid ◽  
In Trans ◽  
2D Structure ◽  
In Cis

Two new Cd(II) complexes, {[Cd(m-bdc)(tmb)(H2O)]·CH3OH}n (1) and {[Cd(t-bdc)(tmb)(H2O)] ·2H2O·DMF}n (2), have been prepared by using 2-((1H-1,2,4-triazol-1-yl)methyl)-1Hbenzimidazole (tmb) as a ligand in the presence of 1,3-benzenedicarboxylic acid (m-H2bdc) or 1,4-benzenedicarboxylic acid (t-H2bdc). Single-crystal X-ray diffraction exhibits that complex 1 displays a 2D structure constructed by tmb ligands in trans conformation and carboxylate groups in a chelating mode. The 2D structure of complex 2is different from that of 1, in that the tmb ligands are in cis conformation, and the carboxylate groups are in both unidentate or chelating coordination mode at the Cd(II) centers. The luminescence properties of 1and 2in the solid state at room temperature have been studied

scholarly journals Synthesis, Crystal Structures and Luminescence Properties of Three New Cadmium 3D Coordination Polymers

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2465
Author(s):  
Hai-Yan Ju ◽  
Gang Zhang ◽  
Ming Yang ◽  
De-Zheng Liu ◽  
Yong-Sheng Yang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Coordination Complexes ◽  
Luminescence Properties ◽  
Solvothermal Reaction ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Π Stacking Interaction ◽  
2D Network ◽  
3D Framework

The new rigid planar ligand 2,5-bis(3-(pyridine-4-yl)phenyl)thiazolo[5,4-d]thiazole (BPPT) has been synthesized, which is an excellent building block for assembling coordination polymer. Under solvothermal reaction conditions, cadmium ion with BPPT in the presence of various carboxylic acids including (1,1′-biphenyl)-4,4′-dicarboxylic acid (BPDC), isophthalic acid (IP), and benzene-1,3,5-tricarboxylic acid (BTC) gave rise to three coordination complexes, viz, [Cd(BPPT)(BPDA)](BPPT)n (1), [Cd(BPPT) (IP)] (CH3OH) (2), and [Cd3(BPPT)3(BTC)2(H2O)2] (3). The structures of 1, 2, and 3 were characterized by single crystal X-ray diffraction. The IR spectra as well as thermogravimetric and luminescence properties were also investigated. Complex 1 is a two-dimensional (2D) network and further stretched to a 3D supramolecular structure through π–π stacking interaction. The complexes 2 and 3 show 3D framework. The complexes 1, 2, and 3 exhibited luminescence property at room temperature.

scholarly journals Synthesis and Structure of novel Luminescent lanthanide organic frameworks.

2014 ◽  
Vol 70 (a1) ◽  
pp. C1259-C1259
Author(s):  
Mohammed S. M. Abdelbaky ◽  
Zakariae Amghouz ◽  
Santiago Granda
Keyword(s):  
Thermal Analyses ◽  
Luminescence Properties ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Carboxylate Groups ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Conventional Electrode ◽  
Li Ion

Lanthanide-Organic frameworks (LnOFs) are currently attracting increasing attention due to their excellent luminescence properties, in which both Ln3+ and organic linkers can be used to give rise to luminescence materials with increased brightness and emission quantum yield [1,2]. Lithium doped MOFs are of particular interest due to the recent studies showing enhanced H2 uptake, as well as promising candidates for replacing the conventional electrode in Li-ion batteries [3,4]. Herein, novel Lithium-lanthanide frameworks based on a rigid dicarboxylic acid, formulated as [LiLn(BDC)2(H2O)·2(H2O)] (Ln = Y, Dy, Ho, Er, Yb, Y1-xEux, Y1-xTbx and H2BDC = Terephthalic acid), have been obtained as single phases under hydrothermal conditions. The crystal structures were solved by single-crystal X-ray diffraction and the bulk characterized by powder X-ray diffraction (PXRD), thermal analyses (TG-MS and DSC), vibrational spectroscopy (FTIR), scanning/transmission electron microscopy (SEM-EDX, TEM, SAED, STEM-EDX), and powder X-ray thermodiffractometry (HT-XRD). All compounds are isostructural (monoclinic P21/c, a = 11.6365(7) Å, b =16.0920(2) Å, c = 13.2243(8) Å and β = 132.23(1)° for Ln = Y [5]) and possess a 3D framework with 1D trigonal channels running along the [101] direction contain water molecules. The structure is built up of unusual four-membered rings formed by edge- and vertex-shared {LnO8} and {LiO4} polyhedra. The four-membered rings are isolated and connected to each other via carboxylate groups. Topologically, the 3D frameworks belongs to a new 2-nodal 3,10-c net with point symbol of {4.5^2}2{4^14.5^10.6^18.7.8^2}. HT-XRD reveals that the compounds undergo phase transformation upon dehydration process which is a reversible process involving a spontaneous rehydration characterized by fast kinetic. The luminescence properties of selected compounds are also studied.

Syntheses, Structures and Properties of a Cobalt(II) and a Cadmium(II) Complex Based on 1-((Benzotriazol-1-yl)methyl)-1H-1,3-imidazole and 1,3-Benzenedicarboxylate Ligands

2014 ◽  
Vol 69 (4) ◽  
pp. 423-431 ◽  
Author(s):  
Qiuying Huang ◽  
Weiping Tang ◽  
Yi Yang ◽  
Wei Liu
Keyword(s):  
Ir Spectra ◽  
Single Crystal ◽  
Layered Structure ◽  
Chain Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carboxylate Groups ◽  
Benzenedicarboxylic Acid ◽  
Structures And Properties ◽  
A Chain

Two new complexes with the formulae {[Co(bmi)2(bdc)(H2O)]·2H2O}n (1) and {[Cd(bmi)(bdc) (H2O)]·DMF}n (2) (bmi = 1-((benzotriazol-1-yl)methyl)-1H-1,3-imidazole, H2bdc = 1,3-benzenedicarboxylic acid) have been synthesized and characterized by single-crystal X-ray diffraction. Complex 1 exhibits a chain structure in which both carboxylate groups of each 1,3-benzenedicarboxylate coordinate to the Co(II) ions in monodentate and chelating modes, and the bmi ligands with a monodentate mode. Complex 2 features a layered structure where both carboxylate groups of each 1,3- benzenedicarboxylate coordinate to the Cd(II) ions in monodentate and chelating modes, but the bmi ligands with a bridging mode. The IR spectra, PXRD patterns, thermogravimetric analyses, and fluorescence properties are also presented.

A Silver(I) Coordination Polymer Based on a Schiff Base Ligand: Synthesis, Crystal Structure and Luminescence Properties

2013 ◽  
Vol 68 (3) ◽  
pp. 284-288 ◽  
Author(s):  
Lin Yu Jin ◽  
Meng Meng Li ◽  
Dong Bin Dang ◽  
Yan Bai ◽  
Yan Ning Zheng
Keyword(s):  
Coordination Polymer ◽  
Room Temperature ◽  
Three Dimensional ◽  
Chain Structure ◽  
Luminescence Properties ◽  
Tridentate Ligand ◽  
Supramolecular Network ◽  
Zigzag Chain ◽  
X Ray Diffraction ◽  
X Ray

A new Ag(I) coordination polymer [AgL(NO3)]n 1 (L=4-(pyridine-2-yl)methyleneamino-1,2,4- trizaole) has been synthesized and characterized by IR spectroscopy, elemental analysis, powder and single-crystal X-ray diffraction. The Ag(I) atom has a seesaw environment with an N3O donor set from three N atoms of two ligands and one O atom of one NO-3 anion. Each twisted tridentate ligand is bound to two silver centers, and each silver atom is coordinated by two ligands thereby generating a zigzag chain structure. The chains interact with each other featuring a three-dimensional supramolecular network through multiple weak C-H···π interactions and C-H···O hydrogen bonds. The luminescence properties of the polymer 1 were investigated in the solid state at room temperature.

Crystal structures and luminescence properties of two Cd(II) complexes based on 2-(1H-imidazol-1-methyl)-6-methyl-1H-benzimidazole

2015 ◽  
Vol 70 (8) ◽  
pp. 577-585 ◽  
Author(s):  
Yuhong Zhang ◽  
Qiuju Zhang ◽  
Yu Wen ◽  
Peng Li ◽  
Lin Ma ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Room Temperature ◽  
Luminescent Properties ◽  
Chain Structure ◽  
Dimethyl Formamide ◽  
X Ray Diffraction ◽  
X Ray ◽  
2D Structure ◽  
A Chain

AbstractTwo new complexes, {[Cd(immb)I2]·DMF}n (1) and {[Cd3(immb)(btc)2]·H2O}n (2) (immb = 2-(1H-imidazol- 1-methyl)-6-methyl-1H-benzimidazole, btc = 1,2,3-benzenetricarboxylate, DMF = dimethyl formamide), have been synthesized and characterized. Single crystal X-ray diffraction shows that 1 exhibits a chain structure constructed by immb ligands bridging Cd(II) ions. In 2, Cd(II) ions are linked by immb ligands with bridging mode and btc3– anions with the μ2-η2:η1 bonding pattern leading to a 2D structure. Luminescent properties have been investigated in the solid state at room temperature.

Facile Sol-Gel Synthesis of Mesoporous TiO2 in Ionic Liquids

2013 ◽  
Vol 389 ◽  
pp. 53-56
Author(s):  
Shu Guo ◽  
Sheng Xu Lu ◽  
Hui Ding ◽  
Zai Feng Shi
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Sol Gel ◽  
Rutile Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carboxylate Groups ◽  
Transmission Electron ◽  
Xrd Patterns ◽  
Sol Gel Synthesis

The mesoporous TiO2 particles was conveniently prepared in a room temperature ionic liquid (RTILs) of 1, 3-di-(3-propionyloxy) imdazolium tetrafluoroborate [DiprCOOBF4 system. The obtained materials were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and N2 adsorptiondesorption analysis. XRD patterns revealed that only rutile phase is formed in the RTILs. The TEM micrographs as well as N2 adsorptiondesorption measurements show that the prepared products exhibited wormlike pore structures. The FTIR (Fourier Transform Infrared Spectra) demonstrate the carboxylate groups attach via bidentate or bridging coordination to the TiO2 surface.

Luminescence Properties of Europium Ion Doped Barium Borophosphate Phosphor

2015 ◽  
Vol 1107 ◽  
pp. 559-564
Author(s):  
Mukarramah M. Kamal ◽  
M. Nor M. Yusuf ◽  
N. Atiqah Jailani ◽  
S. Sholehah Hussein ◽  
R. Hussin ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Solid State Reaction Method ◽  
Luminescence Properties ◽  
Broad Emission Band ◽  
X Ray Diffraction ◽  
X Ray ◽  
Europium Ion ◽  
Lighting Application ◽  
Pure Argon Atmosphere

A series of BaBPO5phosphors doped with different concentration of Eu2+ions were synthesized by solid state reaction method. The reduction of Eu3+to Eu2+ions were obtained by heating in pure argon atmosphere. The structural properties were analyzed by using X-ray diffraction (XRD). Luminescence properties were measured at room temperature using photoluminescence (PL) spectroscopy and the effects of europium ion in the phosphor were investigated. The XRD results showed that crystal structure of the phosphor is hexagonal single phases. The addition of europium ions exhibit a broad emission band in the violet region peaking at 383 nm corresponding to transition of configuration state 4f65d à 4f7(8S7/2) of Eu2+ions. The emission intensity is affected by the concentration of Eu2+. The optimum intensity is observed for 0.2 mol % of Eu2+ion. The occurrence of emission lines in violet region indicates that this phosphor has potential in solid-state lighting application.

Blue Fluorescence of a Binuclear Cd(II) Complex: [Cd(ClC2H4CO2)2(phen)]2

2008 ◽  
Vol 63 (5) ◽  
pp. 503-506 ◽  
Author(s):  
Zhen-Shan Peng ◽  
Yao-Hui Jiang ◽  
Wen-Jun Jiang ◽  
Qian Deng ◽  
Jian-Xiang Liu ◽  
...  
Keyword(s):  
Binuclear Complex ◽  
Room Temperature ◽  
Supramolecular Assembly ◽  
Stacking Interactions ◽  
Chelating Ligands ◽  
X Ray Diffraction ◽  
Blue Fluorescence ◽  
X Ray ◽  
Carboxylate Oxygen ◽  
Carboxylate Groups

A new binuclear complex, [Cd(ClCH2CH2CO2)2(phen)]2 (1), has been synthesized and structurally characterized by single crystal X-ray diffraction methods. The Cd atoms are linked by carboxylate oxygen atoms into a four-membered Cd2O2 rhombic ring with a Cd···Cd separation of 3.824 Å . Two carboxylate groups act as bidentate, and two as both bidentate bridging and bidentate chelating ligands. The hydrogen bonding and π-π stacking interactions are responsible for the supramolecular assembly and stabilization of the crystal structure. The complex has been characterized by elemental analysis, IR and UV/Vis spectra, and thermogravimetric and differential thermal analysis (TG/DTA). The complex exhibits blue fluorescence in the solid at room temperature.

Electron Microscopy of Human Gallstones

1971 ◽  
Vol 29 ◽  
pp. 296-297
Author(s):  
C. Wolpers ◽  
R. Blaschke
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Bile Pigment ◽  
X Ray Diffraction ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Follow Up Study ◽  
Infra Red ◽  
Main Components

Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.

Electron Microscope study of commensurate-incommensurate phase transition in BaZnGeO4

1990 ◽  
Vol 48 (4) ◽  
pp. 172-173
Author(s):  
Naoki Yamamoto ◽  
Makoto Kikuchi ◽  
Tooru Atake ◽  
Akihiro Hamano ◽  
Yasutoshi Saito
Keyword(s):  
Phase Transition ◽  
Electron Microscope Study ◽  
Room Temperature ◽  
Hexagonal Lattice ◽  
Ferroelectric Materials ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Periodic Arrays ◽  
Modulation Wave Vector

BaZnGeO4 undergoes many phase transitions from I to V phase. The highest temperature phase I has a BaAl2O4 type structure with a hexagonal lattice. Recent X-ray diffraction study showed that the incommensurate (IC) lattice modulation appears along the c axis in the III and IV phases with a period of about 4c, and a commensurate (C) phase with a modulated period of 4c exists between the III and IV phases in the narrow temperature region (—58°C to —47°C on cooling), called the III' phase. The modulations in the IC phases are considered displacive type, but the detailed structures have not been studied. It is also not clear whether the modulation changes into periodic arrays of discommensurations (DC’s) near the III-III' and IV-V phase transition temperature as found in the ferroelectric materials such as Rb2ZnCl4.At room temperature (III phase) satellite reflections were seen around the fundamental reflections in a diffraction pattern (Fig.1) and they aligned along a certain direction deviated from the c* direction, which indicates that the modulation wave vector q tilts from the c* axis. The tilt angle is about 2 degree at room temperature and depends on temperature.

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