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 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.

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.

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.

Coordination Polymers of Silver(I) with the Flexible Tritopic Ligand 1,3,5-Tri(4-cyanophenoxy)benzene: Guest Inclusion and Luminescent Properties

2013 ◽  
Vol 66 (4) ◽  
pp. 436 ◽  
Author(s):  
Sandipan Roy ◽  
Kumar Biradha
Keyword(s):  
Crystal Structures ◽  
Coordination Polymers ◽  
Three Dimensional ◽  
Luminescent Properties ◽  
Guest Molecules ◽  
Space Group ◽  
Centrosymmetric Space Group ◽  
Aromatic Guest

A new flexible tritopic ligand, 1,3,5-tri(4-cyanophenoxy)benzene (1), was synthesised by the reaction of phloroglucinol and para-fluorobenzonitrile. Compound 1 crystallises in the non-centrosymmetric space group Pna21. The reaction of ligand 1 with AgBF4 in the presence of different aromatic guest molecules was found to result in coordination polymers, namely, {[Ag3(1)2(BF4)3(H2O)2]·2C7H8·2CH2Cl2}n (2), {[Ag3(1)2(BF4)3(H2O)2]·2C6H6·2CH2Cl2}n (3). The crystal structures of 2 and 3 reveal that ligand 1 is linked by AgI ions into three-dimensional networks containing channels that are occupied by dichloromethane and aromatic guest molecules. The luminescent properties of crystalline 1 and 3 differ significantly.

Coordination Polymers of Lanthanide(III): Toward Encapsulation of Well-Defined Assembly of Guest Molecules

2011 ◽  
Vol 11 (2) ◽  
pp. 547-554 ◽  
Author(s):  
Rupam Sarma ◽  
Himangshu Deka ◽  
Athanassios K. Boudalis ◽  
Jubaraj B. Baruah
Keyword(s):  
Coordination Polymers ◽  
Guest Molecules

scholarly journals Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2317
Author(s):  
Olga Danilescu ◽  
Paulina N. Bourosh ◽  
Oleg Petuhov ◽  
Olga V. Kulikova ◽  
Ion Bulhac ◽  
...  
Keyword(s):  
Schiff Base ◽  
Coordination Polymers ◽  
Crystal Engineering ◽  
Self Assembly ◽  
X Ray Diffraction ◽  
Guest Molecules ◽  
X Ray ◽  
1D Chain ◽  
Two Temperatures ◽  
Adsorption Desorption

Based on solvothermal synthesis, self-assembly of the heptadentate 2,6-diacetylpyridine bis(nicotinoylhydrazone) Schiff base ligand (H2L) and Zn(II) and/or Cd(II) salts has led to the formation of three homometallic [CdL]n (1), {[CdL]∙0.5dmf∙H2O}n (2) and {[ZnL]∙0.5dmf∙1.5H2O}n (3), as well as two heterometallic {[Zn0.75Cd1.25L2]∙dmf∙0.5H2O}n (4) and {[MnZnL2]∙dmf∙3H2O}n coordination polymers. Compound 1 represents a 1D chain, whereas 2–5 are isostructural and isomorphous two-dimensional structures. The entire series was characterized by IR spectroscopy, thermogravimetric analysis, single-crystal X-ray diffraction and emission measurements. 2D coordination polymers accommodate water and dmf molecules in their cage-shaped interlayer spaces, which are released when the samples are heated. Thus, three solvated crystals were degassed at two temperatures and their photoluminescent and adsorption–desorption properties were recorded in order to validate this assumption. Solvent-free samples reveal an increase in volume pore, adsorption specific surface area and photoluminescence with regard to synthesized crystals.

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