Reorientational dynamics of organic cations in perovskite-like coordination polymers

2018 ◽  
Vol 47 (48) ◽  
pp. 17329-17341 ◽  
Author(s):  
M. Rok ◽  
G. Bator ◽  
W. Medycki ◽  
M. Zamponi ◽  
S. Balčiūnas ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Organic Cations ◽  
Guest Molecules ◽  
Reorientational Dynamics

Here we report the dynamics of organic cations as guest molecules in a perovskite host-framework.

scholarly journals Structural diversity induced by ligand geometry: From two-dimensional to three-dimensional coordination polymers with pyridine

2020 ◽  
pp. 174751982096816
Author(s):  
Fang-Kuo Wang ◽  
Shi-Yao Yang ◽  
Hua-Ze Dong
Keyword(s):  
Coordination Polymers ◽  
Three Dimensional ◽  
Structural Diversity ◽  
Dimensional Structure ◽  
Layer By Layer ◽  
Two Dimensional ◽  
Guest Molecules ◽  
X Ray ◽  
Benzenedicarboxylic Acid ◽  
Benzenetricarboxylic Acid

Two coordination polymers with two-dimensional and three-dimensional structures are, {[Zn3(bdc)3(py)2]·2NMP}n (1) (H2bdc = 1,4-benzenedicarboxylic acid) and [Zn2(NO3−)(btc)(nmp)2(py)]n (2) (H3btc = 1,3,5-benzenetricarboxylic acid), synthesized by hot-solution reactions of Zn(NO3)2·6H2O, pyridine (py) and two different ligands in N-methylpyrrolidone (NMP). {[Zn3(bdc)3(py)2]·2NMP}n exhibits two-dimensional networks with trizinc subunits [Zn3(COO)6py2] stacking with a layer-by-layer alignment, and there are strong π–π interactions involving py from adjacent layers. [Zn2(NO3−)(btc)(nmp)2(py)]n has a three-dimensional structure containing two independent zinc ions, tetrahedral ZnO4 and octahedral ZnNO5. Based on X-ray studies, the coordination polymers {[Zn3(bdc)3(py)2]·2NMP}n (1) have a porous structure with NMP guest molecules. In contrast, X-ray studies revealed that coordination polymer [Zn2(NO3−)(btc)(nmp)2(py)]n (2) had a larger void that was inhabited by coordinated py and NMP. In addition, the form of the two coordination polymers changed from two-dimensional to three-dimensional with transformation of the ligand geometry.

Homochiral coordination polymers with nanotubular channels for enantioselective sorption of chiral guest molecules

2014 ◽  
Vol 38 (3) ◽  
pp. 880 ◽  
Author(s):  
Koichi Tanaka ◽  
Yuki Kikumoto ◽  
Naoki Hota ◽  
Hiroki Takahashi
Keyword(s):  
Coordination Polymers ◽  
Guest Molecules

scholarly journals Disappeared supramolecular isomer reappears with perylene guest

IUCrJ ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 324-330
Author(s):  
In-Hyeok Park ◽  
Atanu Dey ◽  
Kenta Sasaki ◽  
Masaaki Ohba ◽  
Shim Sung Lee ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Guest Molecule ◽  
Metal Organic Frameworks ◽  
Guest Molecules ◽  
Supramolecular Isomerism ◽  
The World ◽  
Different Types ◽  
Metal Organic ◽  
The Disappeared ◽  
Kinetic Form

Among different types of polymorphism, disappearing polymorphism deals with the metastable kinetic form which can not be reproduced after its first isolation. In the world of coordination polymers (CPs) and metal–organic frameworks (MOFs), despite the fact that many types of supramolecular isomerism exist, we are unaware of disappearing supramolecular isomerism akin to disappearing polymorphism. This work reports a MOF with dia topology that could not be reproduced, but subsequent synthesis yielded another supramolecular isomer, a double-pillared-layer MOF. When perylene was added in the same reaction, the disappeared dia MOF reappeared with perylene as a guest in the channels. Interestingly, the photoluminescence of the dia MOF with a perylene guest is dominated by the emission of the guest molecule. The influence of guest molecules on the stabilization of the supramolecular isomers of a MOF opens up a strategy to access MOFs with different structures.

Formation of uranyl phthalate coordination polymers with unusual 2D net topologies in the presence of organic cations

CrystEngComm ◽  
2020 ◽  
Vol 22 (48) ◽  
pp. 8394-8404
Author(s):  
Grigory Andreev ◽  
Nina Budantseva ◽  
Anastasiya Levtsova ◽  
Marina Sokolova ◽  
Aleksander Fedoseev
Keyword(s):  
Coordination Polymers ◽  
Topological Analysis ◽  
Organic Cations ◽  
Heterocyclic Cations

Inclusion of heterocyclic cations into a uranyl-phthalate system allowed the formation of 2D coordination polymers whose topological analysis revealed that the underlying nets had unusual topologies.

scholarly journals Molecular Swiss Cheese: new complexes and conformations of p-sulphonato[8]arene

2014 ◽  
Vol 70 (a1) ◽  
pp. C548-C548
Author(s):  
Barbara Lesniewska ◽  
Kinga Suwinska ◽  
Anthony Coleman
Keyword(s):  
Solid State ◽  
Carbon Atom ◽  
Organic Cations ◽  
Swiss Cheese ◽  
Variable Size ◽  
Guest Molecules ◽  
Organic Clay ◽  
The Difference ◽  
Accessible Surface ◽  
Solvent Accessible Surface

"The crystal structures of the salts of para-sulphonatocalix[8]arene with two flexible guest molecules 1,2-bis(4-pyridyl)-ethane (BPE) and 1,3-bis(4-pyridyl)-propane (BPP) are presented. para-Sulphonatocalix[8]arene molecule adopts new types of conformations: ""double facing cone"" in BPP complex and "up-flat-down" in BPE complex. Although the difference between BPE and BPP is only a presence or absence of a single carbon atom in the central bridge, the structures of their complexes with para-sulphonatocalix[8]arene are remarkably different. While the salt with BPE shows true porosity and can be compared to that of an extremely complex zeolite or to a solid state molecular Swiss Cheese, the second structure with BPP shows no porosity and is of the type of organic clay firstly observed for the sodium salt of para-sulphonato-calix[4]arene [1], and can be compared to a Gruyere Cheese. The structure of the para-sulphonatocalix[8]arene with BPE salt (Figure 1) shows a complex network of interconnecting channels of variable size, one of which contains a BPE cation effectively blocking this channel, the others contain water and solvents and are thus accessible. A total of six different channels are observed in this structure. Gas take-up has been demonstrated, to show the porous nature of the solid. The effect of a single carbon atom between the cations on the complexity of the Supramolecular Organic Framework (SOF), is remarkable. Work is currently underway to study other complexes of para-sulphonatocalix[8]arene with rigid and flexible organic cations and to open up the way to novel SOFs. Figure 1. Solvent accessible surface in para-sulphonatocalix[8]arene and 1,2-bis(4-pyridyl)-ethane complex: view along [001] axis."

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