Contrast Solid-State Photoreactive Behavior of Two Two-Dimensional Zn(II) Coordination Polymers

2018 ◽  
Vol 18 (6) ◽  
pp. 3693-3696 ◽  
Author(s):  
Hong Sheng Quah ◽  
Jocelyn Li Xian Yap ◽  
Uma Sambasivam ◽  
Anjana Chanthapally ◽  
Bruno Donnadieu ◽  
...  
Keyword(s):  
Solid State ◽  
Coordination Polymers ◽  
Two Dimensional

scholarly journals Different Benzendicarboxylate-Directed Structural Variations and Properties of Four New Porous Cd(II)-Pyridyl-Triazole Coordination Polymers

2020 ◽  
Vol 8 ◽  
Author(s):  
Ying Zhao ◽  
Jin Jing ◽  
Ning Yan ◽  
Min-Le Han ◽  
Guo-Ping Yang ◽  
...  
Keyword(s):  
Solid State ◽  
Coordination Polymers ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Gas Sorption ◽  
Structural Variations ◽  
Benzenedicarboxylic Acid ◽  
Topological Framework ◽  
The Stability

Four new different porous crystalline Cd(II)-based coordination polymers (CPs), i. e., [Cd(mdpt)2]·2H2O (1), [Cd2(mdpt)2(m-bdc)(H2O)2] (2), [Cd(Hmdpt)(p-bdc)]·2H2O (3), and [Cd3(mdpt)2(bpdc)2]·2.5NMP (4), were obtained successfully by the assembly of Cd(II) ions and bitopic 3-(3-methyl-2-pyridyl)-5-(4-pyridyl)-1,2,4-triazole (Hmdpt) in the presence of various benzendicarboxylate ligands, i.e., 1,3/1,4-benzenedicarboxylic acid (m-H2bdc, p-H2bdc) and biphenyl-4,4′-bicarboxylate (H2bpdc). Herein, complex 1 is a porous 2-fold interpenetrated four-connected 3D NbO topological framework based on the mdpt− ligand; 2 reveals a two-dimensional (2D) hcb network. Interestingly, 3 presents a three-dimensional (3D) rare interpenetrated double-insertion supramolecular net via 2D ···ABAB··· layers and can be viewed as an fsh topological net, while complex 4 displays a 3D sqc117 framework. Then, the different gas sorption performances were carried out carefully for complexes 1 and 4, the results of which showed 4 has preferable sorption than that of 1 and can be the potential CO2 storage and separation material. Furthermore, the stability and luminescence of four complexes were performed carefully in the solid state.

Three isomorphous two-dimensional coordination polymers generated from a benzimidazole bridging ligand and ZnX2(X= Cl, Br and I)

2013 ◽  
Vol 69 (4) ◽  
pp. 367-371
Author(s):  
Yue-Feng Zhang ◽  
Jian-Ping Ma ◽  
Qi-Kui Liu ◽  
Yu-Bin Dong
Keyword(s):  
Solid State ◽  
Benzoic Acid ◽  
Coordination Polymers ◽  
Room Temperature ◽  
Three Dimensional ◽  
Luminescent Properties ◽  
Red Shift ◽  
Two Dimensional ◽  
Π Interactions ◽  
Bridging Ligand

A novel bridging asymmetric benzimidazole ligand, 4-{2-[3-(pyridin-4-yl)phenyl]-1H-benzimidazol-1-ylmethyl}benzoic acid, was used to construct three isomorphous two-dimensional coordination polymers, namelycatena-poly[chlorido(μ3-4-{2-[3-(pyridin-4-yl)phenyl]-1H-benzimidazol-1-ylmethyl}benzoato)zinc(II)], [Zn(C26H18N3O2)Cl]n, (I), and the bromide, (II), and iodide, (III), analogues. Neighbouring two-dimensional networks are stacked into three-dimensional frameworksviainterlayer π–π interactions. The luminescent properties of (I)–(III) were investigated and they display an obvious red-shift in the solid state at room temperature.

A calcium-bridged porphyrin coordination network

2002 ◽  
Vol 06 (06) ◽  
pp. 377-381 ◽  
Author(s):  
Margaret E. Kosal ◽  
Jun-Hong Chou ◽  
Kenneth S. Suslick
Keyword(s):  
Hydrogen Bonding ◽  
Solid State ◽  
Coordination Polymers ◽  
Three Dimensional ◽  
Pyridine Molecule ◽  
Two Dimensional ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Dimensional Network ◽  
Polymeric Framework

The hydrothermal assembly of a very stable porphyrin network with nanoscale cavities is described. A tightly packed and interpenetrated, linear polymeric framework was observed in the solid-state X-ray structure of freebase 5,10,15,20-tetrakis-(4-carboxyphenyl)porphyrin coordinated to calcium(II) ions. Strong hydrogen-bonding interactions between the coordination polymers form a two-dimensional network. Perpendicular bands interpenetrate generating an unusual three-dimensional box that clathrates a pyridine molecule.

Thermal Spin Crossover Behaviour of Two-Dimensional Hofmann-Type Coordination Polymers Incorporating Photoactive Ligands

2014 ◽  
Vol 67 (11) ◽  
pp. 1563 ◽  
Author(s):  
Florence Ragon ◽  
Korcan Yaksi ◽  
Natasha F. Sciortino ◽  
Guillaume Chastanet ◽  
Jean-François Létard ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Analysis ◽  
Spin State ◽  
Coordination Polymers ◽  
Spin Crossover ◽  
Pore Space ◽  
Free Ligand ◽  
Two Dimensional ◽  
Framework Materials ◽  
Active Isomer

Two spin crossover (SCO)-active 2D Hofmann-type framework materials, [Fe(3-PAP)2Pd(CN)4] (A) and [Fe(4-PAP)2Pd(CN)4] (B) containing the photoactive azo-benzene-type ligands 3-phenylazo-pyridine (3-PAP) and 4-phenylazo-pyridine (4-PAP) were prepared. These materials form non-porous Hofmann-type structures whereby 2D [FeIIPd(CN)4] grids are separated by 3- or 4-PAP ligands. The iron(ii) sites of both materials (A and B) undergo abrupt and hysteretic spin transitions with characteristic transition temperatures T1/2↓,↑: 178, 190 K (ΔT: 12 K) and T1/2↓,↑: 233, 250 K (ΔT: 17 K), respectively. Photo-magnetic characterisations reveal light-induced excited spin state trapping (LIESST) activity in both A and B with characteristic T(LIESST) values of 45 and 40 K. Although both free ligands show trans- to-cis isomerisation in solution under UV-irradiation, as evidenced via absorption spectroscopy, such photo-activity was not observed in the ligands or complexes A and B in the solid state. Structural analysis of a further non-SCO active isomer to B, [Fe(4-PAP)2Pd(CN)4]·1/2(4-PAP) (B·(4-PAP)), which contains free ligand in the pore space is reported.

Two-Dimensional Coordination Polymers with Spin Crossover Functionality

2014 ◽  
Vol 67 (11) ◽  
pp. 1553 ◽  
Author(s):  
Natasha F. Sciortino ◽  
Suzanne M. Neville
Keyword(s):  
Solid State ◽  
Coordination Polymers ◽  
Spin Crossover ◽  
Two Dimensional ◽  
Additional Function ◽  
Framework Materials ◽  
Sensing Applications ◽  
Two Dimensional Materials ◽  
Packing Interactions ◽  
Important Structure

In the solid state, the propagation of spin crossover (SCO) information is governed by a complex interplay between inner and outer coordination sphere effects. In this way, lattice cooperativity can be enhanced through solid state packing interactions (i.e. hydrogen-bonding and π-stacking) and via coordinatively linking spin switching sites (i.e. coordination polymers). SCO framework materials have successfully provided an avenue for enhanced cooperativity and additional function as host–guest sensors via their potential porosity. In this review, we explore two-dimensional SCO coordination polymers: (1) spin crossover frameworks (SCOFs) consisting of (4,4) grids and (2) Hofmann-type materials where layers are separated by organic ligands. These families have each allowed the elucidation of important structure–function properties and provided a novel platform for molecular sensing applications. Towards advancing the field of infinite polymeric SCO materials, two-dimensional materials can offer flexible porosity, potentially leading to novel spin state-switching functionality.

Ph-Directed Assembly of Two 2D Copper(II) Coordination Polymers Based on Mixed Benzenetetracarboxylate and 1,4-bis(1,2,4-triazole-1-ylmethyl)-2,3,5,6-Tetrafluorobenzene Ligands: Syntheses, Structures and Properties

2018 ◽  
Vol 42 (2) ◽  
pp. 100-104
Author(s):  
Jing Zhang ◽  
Feng Tian ◽  
Ze-Feng Xia ◽  
Sheng-Chun Chen ◽  
Ming-Yang He ◽  
...  
Keyword(s):  
Solid State ◽  
Coordination Polymers ◽  
Layer Structure ◽  
Directed Assembly ◽  
Brick Wall ◽  
Two Dimensional ◽  
Thermal Stabilities ◽  
Hydrothermal Reactions ◽  
Structures And Properties ◽  
Ph Conditions

Two new Cu(II) coordination polymers [Cu(Fbtx)(H2btec)(H2O)2]n and {[Cu(Fbtx)(btec)0.5(H2O)2]·H2O}n have been synthesised by hydrothermal reactions of Cu(II) nitrate with 1,4-bis(1,2,4-triazole-1-ylmethyl)-2,3,5,6-tetrafluorobenzene (Fbtx) and 1,2,4,5-benzenetetracarboxylic acid (H4btec) under different pH conditions. The first complex has a two-dimensional four-connected layer structure with a 44-sql topology, whereas the second has a two-dimensional three-connected brick-wall network. The luminescence properties of the complexes in the solid state and their thermal stabilities have also been studied.

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