Highly efficient temperature-dependent chiral separation with a nucleotide-based coordination polymer

2018 ◽  
Vol 54 (49) ◽  
pp. 6356-6359 ◽  
Author(s):  
Rosaria Bruno ◽  
Nadia Marino ◽  
Lucia Bartella ◽  
Leonardo Di Donna ◽  
Giovanni De Munno ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Aspartic Acid ◽  
Chiral Separation ◽  
Enantiomeric Excess ◽  
Temperature Dependent ◽  
Highly Efficient ◽  
Racemic Mixtures ◽  
Chiral Coordination Polymer

A chiral coordination polymer separates racemic mixtures ofl- andd-aspartic acid with ad-Asp enantiomeric excess ofca.100%.

scholarly journals Solid-Phase “Self-Hydrolysis” of [Zn(NH3)4MoO4@2H2O] Involving Enclathrated Water—An Easy Route to a Layered Basic Ammonium Zinc Molybdate Coordination Polymer

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4022
Author(s):  
Kende Attila Béres ◽  
István E. Sajó ◽  
György Lendvay ◽  
László Trif ◽  
Vladimir M. Petruševski ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Solid Phase ◽  
Water Molecules ◽  
Temperature Dependent ◽  
Dynamic Interactions ◽  
Ammonia Release ◽  
Successive Substitution ◽  
Red Dye ◽  
Hydrolysis Of ◽  
Zinc Molybdate

An aerial humidity-induced solid-phase hydrolytic transformation of the [Zn(NH3)4]MoO4@2H2O (compound 1@2H2O) with the formation of [(NH4)xH(1−x)Zn(OH)(MoO4)]n (x = 0.92–0.94) coordination polymer (formally NH4Zn(OH)MoO4, compound 2) is described. Based on the isostructural relationship, the powder XRD indicates that the crystal lattice of compound 1@2H2O contains a hydrogen-bonded network of tetraamminezinc (2+) and molybdate (2−) ions, and there are cavities (O4N4(μ-H12) cube) occupied by the two water molecules, which stabilize the crystal structure. Several observations indicate that the water molecules have no fixed positions in the lattice voids; instead, the cavity provides a neighborhood similar to those in clathrates. The @ symbol in the notation is intended to emphasize that the H2O in this compound is enclathrated rather than being water of crystallization. Yet, signs of temperature-dependent dynamic interactions with the wall of the cages can be detected, and 1@2H2O easily releases its water content even on standing and yields compound 2. Surprisingly, hydrolysis products of 1 were observed even in the absence of aerial humidity, which suggests a unique solid-phase quasi-intramolecular hydrolysis. A mechanism involving successive substitution of the ammonia ligands by water molecules and ammonia release is proposed. An ESR study of the Cu-doped compound 2 (2#dotCu) showed that this complex consists of two different Cu2+(Zn2+) environments in the polymeric structure. Thermal decomposition of compounds 1 and 2 results in ZnMoO4 with similar specific surface area and morphology. The ZnMoO4 samples prepared from compounds 1 and 2 and compound 2 in itself are active photocatalysts in the degradation of Congo Red dye. IR, Raman, and UV studies on compounds 1@2H2O and 2 are discussed in detail.

scholarly journals A Highly Efficient Coordination Polymer for Selective Trapping and Sensing of Perrhenate/Pertechnetate

2020 ◽  
Vol 12 (13) ◽  
pp. 15246-15254 ◽  
Author(s):  
Cheng-Peng Li ◽  
Hang Zhou ◽  
Jing Chen ◽  
Jia-Jun Wang ◽  
Miao Du ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Highly Efficient

Redox-active porous coordination polymer based on trinuclear pivalate: Temperature-dependent crystal rearrangement and redox-behavior

2015 ◽  
Vol 223 ◽  
pp. 122-130 ◽  
Author(s):  
Anton S. Lytvynenko ◽  
Mikhail A. Kiskin ◽  
Victoria N. Dorofeeva ◽  
Andrey M. Mishura ◽  
Vladimir E. Titov ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Redox Behavior ◽  
Temperature Dependent ◽  
Redox Active ◽  
Porous Coordination Polymer
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