Synthesis, structure and properties of a heterometallic 4f-5d complex [Sm(Hinic)3(H2O)2]n·(1.5nHgCl4)·(2nH2O)

2011 ◽  
Vol 76 (4) ◽  
pp. 223-234 ◽  
Author(s):  
Wentong Chen
Keyword(s):  
Magnetic Properties ◽  
Hydrothermal Reaction ◽  
Isonicotinic Acid ◽  
Title Complex ◽  
Luminescence Spectra ◽  
Optical Absorption Spectra ◽  
Structure And Properties ◽  
Red Emission ◽  
One Dimensional ◽  
Novel Complex

A novel complex with samarium and mercury [Sm(Hinic)3(H2O)2]n·(1.5nHgCl4)·(2nH2O) (1) (Hinic = pyridine-4-carboxylic acid, i.e. isonicotinic acid), has been synthesized via hydrothermal reaction and structurally characterized. Complex 1 is characteristic of a one-dimensional polycationic chain-like structure. Photoluminescent investigation reveals that the title complex displays interesting emissions in violet, blue, green, orange and red regions. The luminescence spectra show the stronger violet and blue emissions than the green, orange and red ones. The green, orange and red emission bands are attributed to the characteristic emissions of 4G5/2→6HJ (J = 5/2, 7/2, 9/2) of Sm3+ ions. Optical absorption spectra of 1 reveal the presence of a wide optical bandgap of 3.27 eV. The magnetic properties show that complex 1 exhibits antiferromagnetic-like interactions.

scholarly journals Synthesis, structure, semiconductive and photoluminescent properties of [{Eu(NC5H4COOH)3(H2O)2}(1.5ZnCl4)·(2H2O)]n

2009 ◽  
Vol 74 (7) ◽  
pp. 755-764 ◽  
Author(s):  
Wen-Tong Chen ◽  
Xiao-Niu Fang ◽  
Qiu-Yan Luo ◽  
Ya-Ping Xu
Keyword(s):  
Hydrothermal Reaction ◽  
Isonicotinic Acid ◽  
Luminescence Spectra ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
One Dimensional ◽  
X Ray ◽  
Organic Hybrid ◽  
Hybrid Complex ◽  
A Cell

A novel bimetallic 4f-3d metal-isonicotinic acid inorganic-organic hybrid complex [{Eu(NC5H4COOH)3(H2O)2}(1.5ZnCl4)?(2H2O)]n (1) was synthesized via a hydrothermal reaction and structurally characterized by single- crystal X-ray diffraction. Complex 1 crystallizes in the space group C2/c of the monoclinic system with eight formula units in a cell: a = 23.878(8) ?, b = 20.573(6) ?, c = 15.358(5) ?, ? = 127.276(5)?, V = 6003(3) ?3, C18H23Cl6EuN3O10Zn1.5, Mr = 904.11 g/mol, ? = 2.001 g/cm3, S = 1.077, ?(MoK?) = 3.846 mm-1, F(000) = 3536, R = 0.0270 and wR = 0.0672. Complex 1 has a characteristic, one-dimensional polycationic chain-like structure. A photoluminescent investigation revealed that the title complex displays intense emissions in the orange and red regions. The luminescence spectra show that the red emission is stronger than the orange emission. Optical absorption spectra of 1 revealed the presence of an optical gap of 3.56 eV.

Synthesis, Crystal Structure and Magnetic Properties of Novel Complex [μ-(NC)-Fe(CN)3(NO)-μ-(CN)-Cu(ept)]n·4nH2O (ept = N-(2-Aminoethyl)propane-1,3-diamine)

2001 ◽  
Vol 66 (10) ◽  
pp. 1490-1498 ◽  
Author(s):  
Zdeněk Smékal ◽  
Jiří Kameníček ◽  
Ingrid Svoboda ◽  
Albert Escuer
Keyword(s):  
Crystal Structure ◽  
Magnetic Measurement ◽  
Antiferromagnetic Interaction ◽  
Title Complex ◽  
The Novel ◽  
One Dimensional ◽  
X Ray ◽  
Magnetic Investigation ◽  
Novel Complex ◽  
Cyanide Ligands

The novel complex [μ-(NC)-Fe(CN)3(NO)-μ-(CN)-Cu(ept)]n·4nH2O (ept = N-(2-aminoethyl)- propane-1,3-diamine) was obtained by the reaction of Cu(ClO4)2·6H2O with N-(2-amino- ethyl)propane-1,3-diamine and Na2[Fe(CN)5NO]·2H2O in water. This compound was characterized by IR, UV-VIS and EPR spectroscopies and magnetic measurement. Single-crystal X-ray structure analysis revealed that the title complex has a one-dimensional polymeric structure containing hexacoordinate iron(II) with five cyanide ligands (two of them, in trans position, bridging) and one nitrosyl group, and pentacoordinate copper(II) with N-(2-aminoethyl)propane-1,3-diamine and two sites occupied by bridging cyanide ligands. Magnetic investigation revealed a very weak antiferromagnetic interaction between the copper atoms (superexchange interaction parameter J = -1.7(1) cm-1; H = -JSiSi+1) within the chain through the diamagnetic [Fe(CN)5NO]2- ions.

Hydrothermal Synthesis, Crystal Structure and Properties of a 1DMetal- Organic Coordination Polymer {[Zn2(2,2´,3,3´-odpa)(py)3(H2O)]·H2O}n

2010 ◽  
Vol 65 (6) ◽  
pp. 674-678 ◽  
Author(s):  
Qi-Yao Li ◽  
Shang-Quan Zang ◽  
Jia-Bin Li ◽  
Hong-Wei Hou
Keyword(s):  
Coordination Polymer ◽  
Hydrothermal Reaction ◽  
Thermal Analyses ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Structure And Properties ◽  
Thermal Gravimetric ◽  
One Dimensional ◽  
Metal Organic ◽  
Thermal Stability Of

Hydrothermal reaction of Zn(NO3)2·6H2O with 2,2´,3,3´-oxydiphthalic acid (H4odpa) and pyridine (py) at 120 °C yielded a one-dimensional metal-organic coordination polymer {[Zn2(2,2´,3,3´- odpa)(py)3(H2O)]·H2O}n (1), which is further connected together through hydrogen bonds, π· · ·π and C−H· · ·π interactions to give a three-dimensional supramolecular network. The thermal stability of complex 1 was studied by thermal gravimetric (TG) and differential thermal analyses (DTA). Compound 1 exhibits photoluminescence with an emission maximum at ca. 430 nm upon excitation at 350 nm.

A novel holmium–mercury complex: Structure, green photoluminescence, energy transfer mechanism and semiconducting properties

2019 ◽  
Vol 43 (7-8) ◽  
pp. 230-234
Author(s):  
Wei-Sheng Lin ◽  
Han-Mao Kuang ◽  
Hui Luo ◽  
Wen-Tong Chen
Keyword(s):  
Hydrothermal Reaction ◽  
Isonicotinic Acid ◽  
Complex Structure ◽  
Energy Transfer Mechanism ◽  
One Dimensional ◽  
Semiconducting Properties ◽  
Chromaticity Coordinates ◽  
1D Chain ◽  
Green Photoluminescence ◽  
Reflectance Measurements

The complex (Ho(IA)3(H3O)(H2O)) n(0.5 nHg2I6) (HIA = isonicotinic acid) has been synthesized via a hydrothermal reaction and has a one-dimensional (1D) chain-like structure. It has an emission band in the green region of 542 nm, which could originate from the 5 S2 → 5 I8 transition of the Ho3+ ion. The compound possesses Commission Internationale de I’Éclairage chromaticity coordinates of (0.2065, 0.4969) and has a wide optical band gap of 2.32 eV, as found by solid-state UV-Vis diffuse reflectance measurements.

Structure and magnetic properties of a mixed-ligand copper(II) complex

2015 ◽  
Vol 71 (1) ◽  
pp. 44-47 ◽  
Author(s):  
Rong-Guang Lin ◽  
Yu-Lin Wang ◽  
Qian Liang
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Hydrothermal Synthesis ◽  
Mixed Ligand ◽  
Dimensional Chain ◽  
The Novel ◽  
Two Dimensional ◽  
One Dimensional ◽  
Novel Complex ◽  
Thermal Stability Of

The hydrothermal synthesis of the novel complex poly[[μ2-N1,N4-bis(pyridin-3-yl)naphthalene-1,4-dicarboxamide-κ2N3:N3′](μ4-phthalato-κ4O1:O1:O1′:O2′)copper(II)], [Cu(C8H4O4)(C22H16N4O2)]n, is described. With the phthalate ligand connecting neighbouring CuIIcations, an infinite one-dimensional chain is formed. Adjacent one-dimensional chains are connected by the dicarboxamide ligand, forming an intriguing two-dimensional framework. The magnetic properties and thermal stability of this complex are also described.

scholarly journals Crystal Structure and Photophysical Properties of a Novel Dy-Hg Isonicotinic Acid Compound with One-Dimensional Chain-Like Cations

2020 ◽  
Vol 67 (4) ◽  
pp. 1111-1117
Author(s):  
Wen-Tong Chen
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Emission Band ◽  
Hydrothermal Reaction ◽  
Isonicotinic Acid ◽  
Photophysical Properties ◽  
Diffuse Reflectance Spectrum ◽  
Yellow Emission ◽  
Monoclinic System ◽  
One Dimensional

A novel Dy-Hg compound [Dy(HIA)3(H2O)2]2n · 2nHgCl4 · nHgCl5 · nH3O · 3nH2O (1; HIA = isonicotinic acid) was prepared through a hydrothermal reaction and characterized by X-ray diffraction. The compound crystallizes in the space group of C2/c of the monoclinic system. The crystal structure of compound 1 has one-dimensional (1-D) chain-like cations. A photoluminescence experiment with a solid-state sample revealed that this compound exhibits a yellow emission band at 575 nm and, this emission band shall come from the 4f electron 4F9/2 → 6H13/2 characteristic transfer of Dy3+ ions. The compound features CIE chromaticity coordinates of 0.5168 and 0.4824 in the yellow region. A UV-visible diffuse reflectance spectrum with a solid-state sample unveiled that this compound possesses a wide optical band gap of 3.39 eV.

scholarly journals Magnetocaloric Ln(HCO2)(C2O4) frameworks: Synthesis, Structure and Magnetic Properties

2021 ◽  
Author(s):  
Mario Falsaperna ◽  
Gavin B G Stenning ◽  
Ivan da Silva ◽  
Paul James Saines
Keyword(s):  
Magnetic Properties ◽  
Orthorhombic Structure ◽  
One Dimensional ◽  
Coordination Frameworks

This study probes the structure and the magnetic properties of members of the Ln(HCO2)(C2O4) (Ln = Sm3+-Er3+) family of coordination frameworks. These frameworks adopt a Pnma orthorhombic structure with one-dimensional...

NIR and Upconversion Luminescence Properties of Nd3+ Doped in Gd2O3-CaO-SiO2-B2O3 Glass System

2014 ◽  
Vol 548-549 ◽  
pp. 124-128 ◽  
Author(s):  
S. Insiripong ◽  
S. Kaewjeang ◽  
U. Maghanemi ◽  
H.J. Kim ◽  
N. Chanthima ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Upconversion Luminescence ◽  
Emission Spectra ◽  
Concentration Quenching ◽  
Luminescence Spectra ◽  
Optical Absorption Spectra ◽  
Glass Matrices ◽  
Nir Luminescence

In this work, properties of Nd3+ in Gd2O3-CaO-SiO2-B2O3 glass systems with composition 25Gd2O3-10CaO-10SiO2-(55-x)B2O3-xNd2O3 where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol% were investigated. The optical absorption spectra show peaks at 4F3/2 (877 nm) , 4F5/2+2H9/2 (802 nm), 4F7/2+4S3/2 (743 nm), 4F9/2 (682 nm), 2H11/2 (627 nm), 2G7/2 +4G5/2 (582 nm), 4G7/2 +2K13/2 (527 nm), 4G11/2 (481 nm), 2P1/2 (427 nm) and 2L15/2 + 4D1/2 + 1I11/2+ 4D5/2+ 4D3/2 (355 nm) reflecting the Nd3+ ions in glass matrices. The densities were increased with increasing of Nd2O3 concentration. This indicates the increase of the molecular weight by the replacement of B2O3 with a heavier Nd2O3 oxide in the glass. The upconversion luminescence spectra show bands at 393 nm for all Nd2O3 concentration and the strongest intensity from 2.5 % mol of Nd2O3 was obtained. For NIR luminescence, the intensity of Nd3+ emission spectra increases with increasing concentrations of Nd3+ up to 1.5 mol% and beyond 1.5 mol% the concentration quenching is observed.

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