Anion-exchange reactions of hydroxy double salts

1993 ◽  
Vol 32 (7) ◽  
pp. 1209-1215 ◽  
Author(s):  
Martina Meyn ◽  
Klaus Beneke ◽  
Gerhard Lagaly
Keyword(s):  
Anion Exchange ◽  
Exchange Reactions ◽  
Double Salts ◽  
Hydroxy Double Salts

ChemInform Abstract: Anion-Exchange Reactions of Hydroxy Double Salts.

ChemInform ◽  
2010 ◽  
Vol 24 (28) ◽  
pp. no-no
Author(s):  
M. MEYN ◽  
K. BENEKE ◽  
G. LAGALY
Keyword(s):  
Anion Exchange ◽  
Exchange Reactions ◽  
Double Salts ◽  
Hydroxy Double Salts

Preparation of hydroxy double salts exchanged by organic compounds

1998 ◽  
Vol 13 (4) ◽  
pp. 848-851 ◽  
Author(s):  
Hiroyuki Morioka ◽  
Hideyuki Tagaya ◽  
Masa Karasu ◽  
Jun-ichi Kadokawa ◽  
Koji Chiba
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Layered Double Hydroxides ◽  
Interlayer Spacing ◽  
Layered Materials ◽  
Exchange Reactions ◽  
Double Salts ◽  
Hydroxy Double Salts ◽  
Double Hydroxides ◽  
Positively Charged

Hydroxy double salts (HDS's) comprise a class of layered materials that are similar to layered double hydroxides (LDH's) and show a comparable intracrystalline reactivity. Their anion exchange reactions occur with preincorporated anions in the hydroxide layer and with anions bound as gegenions of the positively charged layers, respectively. In this study, nitrate and acetate anions of HDS's were exchanged with anionic monoand di-carboxylic acids, and we confirmed that interlayer spacing of HDS's increased depending on the size of mono- and di-carboxylic acids. Moreover, we have prepared photofunctional materials by exchange reaction with azobenzene-p-carboxylic acid and 4–4′-azobenzenedicarboxylic acid.

scholarly journals Controlled Release Kinetics in Hydroxy Double Salts: Effect of Host Anion Structure

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Stephen Majoni ◽  
Jeanne M. Hossenlopp
Keyword(s):  
Controlled Release ◽  
Dipole Moments ◽  
Release Kinetics ◽  
Strong Dependence ◽  
Exchange Reactions ◽  
Metal Hydroxides ◽  
Double Salts ◽  
Rate Of Reaction ◽  
Hydroxy Double Salts ◽  
Double Hydroxides

Nanodimensional layered metal hydroxides such as layered double hydroxides (LDHs) and hydroxy double salts (HDSs) can undergo anion exchange reactions releasing intercalated anions. Because of this, these metal hydroxides have found applications in controlled release delivery of bioactive species such as drugs and pesticides. In this work, isomers of hydroxycinnamate were used as model compounds to systematically explore the effects of anion structure on the rate and extent of anion release in HDSs. Following intercalation and subsequent release of the isomers, it has been demonstrated that the nature and position of substituent groups on intercalated anions have profound effects on the rate and extent of release. The extent of release was correlated with the magnitude of dipole moments while the rate of reaction showed strong dependence on the extent of hydrogen bonding within the layers. The orthoisomer showed a more sustained and complete release as compared to the other isomers.

ANION EXCHANGE IN COPPER HYDROXY DOUBLE SALTS

1997 ◽  
pp. 403-411
Author(s):  
Catherine S. Bruschini ◽  
Michael J. Hudson
Keyword(s):  
Anion Exchange ◽  
Double Salts ◽  
Hydroxy Double Salts

Anion-exchange reactions of layered double hydroxides

1990 ◽  
Vol 29 (26) ◽  
pp. 5201-5207 ◽  
Author(s):  
Martina Meyn ◽  
Klaus Beneke ◽  
Gerhard Lagaly
Keyword(s):  
Anion Exchange ◽  
Layered Double Hydroxides ◽  
Exchange Reactions ◽  
Double Hydroxides

Resolution and reconstitution of anion exchange reactions

1990 ◽  
Vol 326 (1236) ◽  
pp. 437-454 ◽  
Keyword(s):  
Anion Exchange ◽  
Membrane Surface ◽  
Exchange Reactions ◽  
Alpha Helices ◽  
Common Structure ◽  
Physiological Properties ◽  
Secondary Carriers ◽  
Hydrophilic Loop ◽  
Primary Substrate

To illustrate the emerging class of anion exchange proteins in bacteria, this article discusses the biochemical and physiological properties of phosphate (Pi)-linked antiporters that accept glucose 6-phosphate (G6P) as their primary substrate. These systems have a bifunctional active site that binds a pair of negative charges, whether presented as a single divalent anion or a pair of monovalent substrates. Exchange stoichiometry therefore .moves between the limits of 2:1 and 2:2 according to the ratio of mono- and divalent substrates at either membrane surface. This predicts an interesting reaction sequence in vivo because internal pH is more alkaline than external pH; one expects an asymmetric exchange as a pair of monovalent G6P anions moves against a single divalent G6P, and in this way an otherwise futile selfexchange of G6P can result in a net inward flux driven (indirectly) by the pH gradient. Despite their biochemical complexity, at a molecular level the Pi-linked antiporters resemble other secondary carriers. Indeed, the current listing of nearly two dozen such proteins suggests a structural theme in which the minimal functional unit has two sets of six transmembrane alpha helices separated by a central hydrophilic loop. Presently described examples show that this topology can derive from either a single protein or from pairs of identical subunits. The finding of this common structure makes it possible to begin building more detailed structural models that have more general implications.

Tuning the emission spectrum of highly stable cesium lead halide perovskite nanocrystals through poly(lactic acid)-assisted anion-exchange reactions

2018 ◽  
Vol 6 (20) ◽  
pp. 5375-5383 ◽  
Author(s):  
Longshi Rao ◽  
Yong Tang ◽  
Caiman Yan ◽  
Jiasheng Li ◽  
Guisheng Zhong ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Emission Spectrum ◽  
Anion Exchange ◽  
Poly Lactic Acid ◽  
Exchange Reactions ◽  
Perovskite Nanocrystals ◽  
Stable Cesium ◽  
Halide Perovskite ◽  
Lead Halide

Emission tunable CsPbX3 NCs with high QY and stability were synthesized via PLA-assisted anion-exchange reactions.

Hollow BiVO4/Bi2S3 cruciate heterostructures with enhanced visible-light photoactivity

2019 ◽  
Vol 9 (1) ◽  
pp. 182-187 ◽  
Author(s):  
Chen Zhuang ◽  
Lanqin Tang ◽  
Zhentao Yu ◽  
Tianxiao Peng ◽  
Yongcai Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Anion Exchange ◽  
Light Illumination ◽  
Photocurrent Response ◽  
Exchange Reactions ◽  
Visible Light Illumination

Unique BiVO4/Bi2S3 cruciate hollow heterostructures are successfully constructed via anion exchange reactions using cruciate BiVO4 as templates and precursors. The hollow heterostructures exhibit excellent enhanced photocurrent response and photocatalytic activity for reduction of Cr6+ under visible-light illumination.

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