Structural Design and Synthesis of H3O+-β”/βAl2O3 and NH4-β”/β-Al2O3 Polycrystals

1988 ◽  
Vol 135 ◽  
Author(s):  
Patrick S. Nicholson
Keyword(s):  
Ion Exchange ◽  
Structural Design ◽  
Synthesis And Characterization ◽  
Total Weight Loss ◽  
Chemical Formula ◽  
Two Phase ◽  
Design And Synthesis ◽  
And Control

AbstractThe synthesis and characterization of H3Oβ”/β-Al2O3 and NH4 + -H3O+β”/β-Al2O3 poly-crystals is described. The role of stress development and control in the intermediate stages of ion-exchange of the NaK-β”/βA12O3 ceramics is analysed and identifies the β-Al2O3 phase as acting as inert reinforcement for the two-phase composite. The Rb + ion-exchange of the intermediate K + β”/β-Al2O3 requisite for NH4+/H3O + ion-exchange to NH4-H3O+β”/βAl2O3 is described as also is the NH4NO3 exchange to the final ceramic. The total weight loss on heating NH4-H3O+β”/βAl2O3 polycrystals to 810°C is 7.4% which agrees with the value expected from the chemical formula. The 25°C conductivity of the grains of NH4 +-H3O + β”/βAl2O3 was 1.7 × 10−4 (ω-cm)−1 and the bulk conductivity was 3 × 10−5(ω-cm)−1.

Dual crosslinked metallopolymers using orthogonal metal complexes as rewritable shape-memory polymers

2021 ◽  
Author(s):  
Ulrich Sigmar Schubert ◽  
Josefine Meurer ◽  
Thomas Baetz ◽  
Julian Hniopek ◽  
Stefan Zechel ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Shape Memory ◽  
Structural Design ◽  
Shape Memory Polymers ◽  
Synthesis And Characterization

This work presents the synthesis and characterization of easily tuneable shape-memory metallopolymers. Furthermore, the structural design enables excellent rewriting properties. For this purpose, two different polymers were synthesized using either...

scholarly journals SYNTHESIS AND CHARACTERIZATION OF Cu (II) COMPLEXS WITH 1,4,8-TRIS(2-HIDROXYMETHIL)-11-METHYL-1,4,8,11-TETRAAZACYCLOTETRADECANE

2010 ◽  
Vol 3 (2) ◽  
pp. 70-73 ◽  
Author(s):  
Sentot Budi Rahardjo
Keyword(s):  
Ir Spectra ◽  
Magnetic Moment ◽  
Synthesis And Characterization ◽  
Chemical Formula ◽  
Visible Spectra ◽  
Cu Bonding

Cu (II) complexs with 1,4,8-tris(2-hidroxymethyl)-11-methyl-1,4,8,11-tetraazacyclotetradecane (L) have been synthesized with chemical formula of [CuL](ClO4) (experimental Cu = 32.7 %, H = 6.4%, theoritical Cu = 32.6 %, H = 6.4 %). Its magnetic moment of 1.90 BM indicated that the complexs is paramagnetic and there are no Cu-Cu bonding. This complexs is stable with the value of log k [CuL]2+ = 17.3(2). Visible spectra of [CuL]2+ showed that single wide peak at λmax of 628 nm (ε = 164 dm3.mol-1.cm-1) and indicated of E9 - T29 transition. The IR spectra and the conductancy data indicated that the ClO4 was not coordinated to Cu.   Keywords: tembaga (II), senyawa kompleks, paramagnetik

Synthesis and characterization of a novel soluble neohesperidin-copper(II) complex using Ion-exchange resin column

Polyhedron ◽  
2020 ◽  
Vol 188 ◽  
pp. 114694
Author(s):  
Na Xia ◽  
Wenjing Wan ◽  
Siming Zhu ◽  
Huan Wang ◽  
Kouame Ally
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Synthesis And Characterization ◽  
Resin Column

Synthesis and characterization of bifunctional ion-exchange/coordination resins

1987 ◽  
Vol 20 (6) ◽  
pp. 1191-1196 ◽  
Author(s):  
Spiro D. Alexandratos ◽  
Donna R. Quillen ◽  
Marie E. Bates
Keyword(s):  
Ion Exchange ◽  
Synthesis And Characterization

Synthesis and Characterization of Novel Inorganic Microporous Beryllophosphates

1992 ◽  
Vol 57 (4) ◽  
pp. 794-798 ◽  
Author(s):  
Long Yu ◽  
Wenqin Pang
Keyword(s):  
Ion Exchange ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Factors Affecting ◽  
X Ray ◽  
Earth Cation ◽  
Diffraction Patterns ◽  
Unique Framework ◽  
Exchange Properties

Five new types of microporous beryllophosphates were hydrothermally synthesized using BeO-P2O5-R-MCl (or MCl2)-H2O, R being cyclohexylamine (CHA), pyrrolidine, 1-butylamine or triethylamine, M alkali or alkali earth cation. X-Ray diffraction patterns (XRD), infrared (IR), TG-DT and elemental analysis show that the crystalline beryllophosphates have novel, unique framework structures, composed from basic units of tetrahedral PO4 and BeO4. These materials exhibit zeolite-like adsorption and ion-exchange properties. Factors affecting the product crystallization (as e.g. pH), type of cation and composition of reaction mixture are discussed.

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