Preparation of a Three-Dimensional Silver(I) Nano-Coordination Polymer from its Single Crystals by Thermal Treatment with Oleic Acid

2012 ◽  
Vol 638 (3-4) ◽  
pp. 692-697 ◽  
Author(s):  
Kamran Akhbari ◽  
Ali Morsali
Keyword(s):  
Oleic Acid ◽  
Thermal Treatment ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Three Dimensional ◽  
Nano Coordination Polymer

scholarly journals Novel Three-Dimensional Copper(II) 1,2- Ethylenediphosphonate Framework with Channel-like Voids

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Thermal Treatment ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Magnetic Measurements ◽  
Three Dimensional ◽  
Ambient Air ◽  
Water Molecules ◽  
The Novel ◽  
Square Planar ◽  
Superexchange Coupling

Turquoise monoclinic single crystals of the novel three-dimensional Cu2[μ8-O3P(CH2)2PO3)].3.2H2O coordination polymer have been prepared using the silica gelmethod. Space group C2/m (no. 12) with a = 1483.6(2), b = 668.44(8), c = 436.30(6) pm, beta =93.28(2)°. The Cu2+ cation is coordinated by four oxygen atoms stemming from the 1,2-ethylenediphosphonate dianions in a square planar manner and two water molecules in theaxial positions. The connection between the Cu2+ cations and the [PO3C] units from the 1,2-ethylenediphosphonate dianions leads to layers parallel to (100), which are linked by theethylene groups to a three-dimensional framework with channel-like voids. The voidsaccommodate water molecules not bound to Cu2+ and extend parallel along [001] with anopening of about 550 260 pm. Magnetic measurements reveal an antiferromagneticbehaviour due to a superexchange coupling between Cu2+ ions through an oxygen bridge. TheUV-Vis spectrum reveals three dd transition bands at 694, 774, and 918 nm. The compoundcan be fully dehydrated by thermal treatment and rehydrated by storage in ambient air.

scholarly journals Cu2[Cu(H2O)4][(CH2)4(NH3)2][C6H2(COO)4]2·4H2O — A Three-Dimensional Coordination Polymer with Negativ Excess Charge and Channel-like Voids

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Aqueous Solution ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Three Dimensional ◽  
Excess Charge ◽  
Ferromagnetic Coupling ◽  
Space Group ◽  
Exothermic Decomposition ◽  
Thermoanalytical Measurements

Triclinic single crystals of Cu2[Cu(H2O)4][(CH2)4(NH3)2][C6H2(COO)4]2·4H2O have beenprepared in aqueous solution at 55 °C. Space group P-1 (no. 2), a = 799.73(7), b = 977.43(8),c = 1086.27(9) pm, α = 87.194(7), β = 84.679(7), γ = 74.744(6)°, V = 0.81540(12) nm3, Z = 1.There are two unique Cu2+ with CN 4+1 (Cu(1)) and CN 4+2 (Cu(2)), respectively. The Cu-Odistances range from 197.4(2) to 214.9(2) pm (Cu(1)) and 191.6(2) to 240.1(4) pm (Cu(2)).There is a short Cu(1)-Cu(1) contact of 267.02(6) pm. A three-dimensional coordinationpolymer with negative excess charge and channel-like voids extending parallel to [-110] ismade up by Cu2+ and [C6H2(COO)4]4-. These voids accomodate [(CH2)4(NH3)2]2+ and watermolecules, which are not coordinated to Cu2+. Thermoanalytical measurements in airindicated a step-wise loss of water of crystallization commencing at 63 °C, which is finishedat approx. 250 °C followed by an exothermic decomposition yielding CuO. The Cu(1) pairsshow anti-ferromagnetic coupling.

Solid-state thermal conversion of a nanoporous metal–organic framework to a nonporous coordination polymer

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 50778-50782 ◽  
Author(s):  
Fatemeh Shahangi Shirazi ◽  
Kamran Akhbari
Keyword(s):  
Solid State ◽  
Thermal Treatment ◽  
Coordination Polymer ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Thermal Conversion ◽  
Grid Network ◽  
Nanoporous Metal ◽  
Metal Organic ◽  
Organic Framework

A nanoporous metal–organic framework with pillared 2D square-grid network, converts to a nonporous three-dimensional coordination polymer of upon thermal treatment at 350 °C.

scholarly journals [Mn(H2O)2]4[HNC5H4(COO)]2[C6H2(COO)4]2·4H2O — A Three-dimensional Coordination Polymer with Guest Water Molecules in Channel-like Voids

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Aqueous Solution ◽  
Thermogravimetric Analysis ◽  
Coordination Polymer ◽  
Oxygen Atom ◽  
Single Crystals ◽  
Isonicotinic Acid ◽  
Three Dimensional ◽  
Water Molecules ◽  
Space Group ◽  
Distorted Octahedral

Single crystals of [Mn(H2O)2]4[HNC5H4(COO)]2[C6H2(COO)4]2·4H2O have been prepared in aqueous solution at 55 °C. Space group P-1 (no. 2), a = 999.7(2), b = 1314.4(2), c =1645.8(2) pm, α = 101.096(8)°, β = 92.796(14)°, γ = 96.03(2)°, V = 2.1053(5) nm3, Z = 2.There are four unique Mn2+ which are coordinated in a distorted, octahedral manner by twowater molecules, three oxygen atoms of the pyromellitate anions and one oxygen atom of isonicotinic acid (Mn—O 208.6(2) — 227.3(3) pm). The connection of Mn2+ and [C6H2(COO)4]4— yields a three-dimensional coordination polymer with two different, channel-like voids extending parallel to [110]. The first channel accomodates water molecules, the second channel is filled by isonicotinic acid molecules. Thermogravimetric analysis in air revealed that the loss of water of crystallisation occurs in two steps between 97 and 200 °C. The dehydrated sample was stable between 200 and 340 °C. Further decomposition yielded Mn3O4.

scholarly journals Synthesis and crystal structure of a new coordination polymer based on lanthanum and 1,4-phenylenediacetate ligands

2019 ◽  
Vol 75 (3) ◽  
pp. 378-382
Author(s):  
Magatte Camara ◽  
Insa Badiane ◽  
Mamoudou Diallo ◽  
Carole Daiguebonne ◽  
Olivier Guillou
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Coordination Polyhedron ◽  
Sodium Salt ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
The Other ◽  
Synthesis And Crystal Structure ◽  
Metal Organic

Reaction in gel between the sodium salt of 1,4-phenylenediacetic acid (Na2C10O4H8–Na2 p-pda) and lanthanum chloride yields single crystals of the three-dimensional coordination polymer poly[[tetraaquatris(μ-1,4-phenylenediacetato)dilanthanum(III)] octahydrate], {[La2(C10H8O4)3(H2O)4]·8H2O}∞. The LaIII coordination polyhedron can be described as a slightly distorted monocapped square antiprism. One of the two p-pda2− ligands is bound to four LaIII ions and the other to two LaIII ions. Each LaIII atom is coordinated by five ligands, thereby generating a metal–organic framework with potential porosity properties.

scholarly journals Co[(C6H10)(NH3)2][C6H2(COO)4] · 2H2O and Zn[(C6H12)(NH3)2][C6H2(COO)4] · 1/2H2O - Two Zeolite-Like Three-Dimensional Coordination Polymers

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Thermogravimetric Analysis ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Coordination Polymers ◽  
Three Dimensional ◽  
Water Molecules ◽  
Crystallographic Axis ◽  
Excess Charge ◽  
Space Group ◽  
Oxygen Atoms

Monoclinic single crystals of Co[(C6H10)(NH3)2][C6H2(COO)4] · 2H2O have been prepared inaqueous solution at 80 °C. Space group C2/c (no. 15), a = 1065.92(8), b = 1568.97(9), c =1140.88(9) pm, β = 90.101(6)°, V = 1.9080(2) nm3, Z = 4. Co2+, which is situated on atwofold crystallographic axis, is coordinated in a moderately distorted tetrahedral fashion byfour oxygen atoms stemming from the pyromellitate anions (Co-O 197.87(12) and 200.64(12)pm). A three-dimensionally connected coordination polymer is made up by Co2+ andC6H2(COO)44- featuring channel-like voids, which accomodate water molecules and(C6H10)(NH3)22+ cations compensating for the negative excess charge of the three-dimensionalframework. Thermogravimetric analysis in air showed that the dehydrated compound wasstable between 198 and 361 °C. Further decomposition yielded CoO.Zn[(C6H12)(NH3)2][C6H2(COO)4]·1/2H2O (2) was prepared analogously to 1 employing 1, 6-diaminohexane. Space group P21/n (no. 14), a = 1087.78(8), b = 1515.18(11), c = 1162.21(10)pm, β=96.249(7)°, V = 1.9042(3) nm3, Z = 4. Zn2+ is coordinated tetrahedrally like Co2+ byoxygen atoms of the pyromellitate anions (Zn—O 195.0(4) - 197.8(4)). The connection ofZn2+ with the anions leads similar to 1 to a three-dimensional framework with voidsaccomodating (C6H12)(NH3)22+-cations and water molecules. 2 was stable anhydrouslybetween approx. 120 and 340 °C, the further decomposition was completed at 700 °C yieldingZnO.

The Influence of Thermal Treatment on Elastic and Anelastic Properties of Ni55Fe18Ga27 Alloy Single Crystals

2019 ◽  
Vol 45 (3) ◽  
pp. 288-291
Author(s):  
K. V. Sapozhnikov ◽  
V. I. Nikolaev ◽  
V. M. Krymov ◽  
S. B. Kustov
Keyword(s):  
Thermal Treatment ◽  
Single Crystals
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