The influence of different coordination environments on one-dimensional Cu(ii) coordination polymers for the photo-degradation of organic dyes

2016 ◽  
Vol 45 (18) ◽  
pp. 7697-7707 ◽  
Author(s):  
Navid Hussain ◽  
Vimal K. Bhardwaj
Keyword(s):  
Coordination Polymers ◽  
Organic Dyes ◽  
Polymeric Complex ◽  
Photo Degradation ◽  
Coordination Environment ◽  
One Dimensional ◽  
Photo Catalytic Activity ◽  
Catalytic Rate Constant ◽  
Catalytic Rate

The role of coordination environment in 1D Cu(ii) coordination polymers for photo-catalytic activity has been investigated. Pyridine-2,6-dicarbohydrazide based polymeric complex 3 has the highest photo-catalytic rate constant (k = 0.72 h−1) for rhodamine B degradation.

Synthesis, designing strategies and photocatalytic charge dynamics of Metal-Organic Frameworks (MOFs): A catalyzed Photo-degradation approach towards Organic Dyes

2021 ◽  
Author(s):  
Ayushi Singh ◽  
Ashish Kumar Singh ◽  
Jian-Qiang Liu ◽  
Abhinav Kumar
Keyword(s):  
Small Molecule ◽  
Coordination Polymers ◽  
Organic Dyes ◽  
Metal Organic Frameworks ◽  
Gas Storage ◽  
New Variety ◽  
Photo Degradation ◽  
Charge Dynamics ◽  
Potential Applications ◽  
Metal Organic

Metal-organic frameworks (MOFs) or coordination polymers (CPs) are regarded as new variety of materials that find potential applications in plethora of areas such as gas/small molecule absorption/separation, gas storage, membranes...

Role of halogen atoms in the formation of one-dimensional Cu(I) coordination polymers based on 2-amino-5-halopyrimidine

2017 ◽  
Vol 1144 ◽  
pp. 173-180
Author(s):  
Pradhumna Mahat Chhetri ◽  
Yu-Chia Chang ◽  
Hui-Ling Hu ◽  
Yen-Hsun Chiang ◽  
Xiang-Kai Yang ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
One Dimensional ◽  
Halogen Atoms

scholarly journals Solvent-vapour-assisted pathways and the role of pre-organization in solid-state transformations of coordination polymers

IUCrJ ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 188-197 ◽  
Author(s):  
James S. Wright ◽  
Iñigo J. Vitórica-Yrezábal ◽  
Harry Adams ◽  
Stephen P. Thompson ◽  
Adrian H. Hill ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Thermal Analyses ◽  
Polymer Chains ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
Solvent Vapour ◽  
Templating Effect ◽  
Sole Product

A family of one-dimensional coordination polymers, [Ag4(O2C(CF2)2CF3)4(phenazine)2(arene)n]·m(arene),1(arene = toluene or xylene), have been synthesized and crystallographically characterized. Arene guest loss invokes structural transformations to yield a pair of polymorphic coordination polymers [Ag4(O2C(CF2)2CF3)4(phenazine)2],2aand/or2b, with one- and two-dimensional architectures, respectively. The role of pre-organization of the polymer chains of1in the selectivity for formation of either polymorph is explored, and the templating effect of toluene andp-xylene overo-xylene orm-xylene in the formation of arene-containing architecture1is also demonstrated. The formation of arene-free phase2b, not accessible in a phase-pure form through other means, is shown to be the sole product of loss of toluene from1-tol·tol[Ag4(O2C(CF2)2CF3)4(phenazine)2(toluene)]·2(toluene), a phase containing toluene coordinated to Ag(I) in an unusual μ:η1,η1manner. Solvent-vapour-assisted conversion between the polymorphic coordination polymers and solvent-vapour influence on the conversion of coordination polymers1to2aand2bis also explored. The transformations have been examined and confirmed by X-ray diffraction, NMR spectroscopy and thermal analyses, includingin situdiffraction studies of some transformations.

scholarly journals Stimuli-Responsive Zinc (II) Coordination Polymers: A Novel Platform for Supramolecular Chromic Smart Tools

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3712
Author(s):  
Rosita Diana ◽  
Ugo Caruso ◽  
Barbara Panunzi
Keyword(s):  
Cross Section ◽  
Coordination Polymers ◽  
Imaging Technique ◽  
Stimuli Responsive ◽  
Advanced Imaging ◽  
Coordination Environment ◽  
Unique Role ◽  
Responsive Materials ◽  
The Past

The unique role of the zinc (II) cation prompted us to cut a cross-section of the large and complex topic of the stimuli-responsive coordination polymers (CPs). Due to its flexible coordination environment and geometries, easiness of coordination–decoordination equilibria, “optically innocent” ability to “clip” the ligands in emissive architectures, non-toxicity and sustainability, the zinc (II) cation is a good candidate for building supramolecular smart tools. The review summarizes the recent achievements of zinc-based CPs as stimuli-responsive materials able to provide a chromic response. An overview of the past five years has been organised, encompassing 1, 2 and 3D responsive zinc-based CPs; specifically zinc-based metallorganic frameworks and zinc-based nanosized polymeric probes. The most relevant examples were collected following a consequential and progressive approach, referring to the structure–responsiveness relationship, the sensing mechanisms, the analytes and/or parameters detected. Finally, applications of highly bioengineered Zn-CPs for advanced imaging technique have been discussed.

scholarly journals The Role of Redox Potential and Molecular Structure of Co(II)-Polypyridine Complexes on the Molecular Catalysis of CO2 Reduction

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 948
Author(s):  
Juan Pablo F. Rebolledo-Chávez ◽  
Gionnany Teodoro Toral ◽  
Vanesa Ramírez-Delgado ◽  
Yolanda Reyes-Vidal ◽  
Martha L. Jiménez-González ◽  
...  
Keyword(s):  
Redox Potential ◽  
Chemical Reaction ◽  
Co2 Reduction ◽  
Chelate Complexes ◽  
Transfer Processes ◽  
Catalytic Rate Constant ◽  
Catalytic Rate ◽  
Molecular Catalysis ◽  
Electron Transfer Processes

In this work, we report the electrochemical response of a family of Co(II) complexes, [CoII(L)3]2+ and [CoII(L’)2]2+ (L = 2,2’-bipyridine, 1,10-phenanthroline, 3,4,7,8-tetramethyl-1,10-phenanthroline, 5,6-dimethyl-1,10-phenanthroline, and 4,7-diphenyl-1,10-phenanthroline; L’ = terpyridine and 4-chloro-terpyridine), in the presence and absence of CO2 in order to understand the role of the redox potential and molecular structure on the molecular catalysis of CO2 reduction. The tris chelate complexes exhibited three electron transfer processes [CoII(L)3]2+ ⇄ [CoIII(L)3]3+ + 1e−, [CoΙΙ(L)3]2++1e− ⇄ [CoΙ(L)3]+, and [CoΙ(L)3]+ + 2e- ⇄ [CoΙ(L)(L−)2]−. In the case of complexes with 1,10-phen and 2,2-bipy, the third redox process showed a coupled chemical reaction [CoΙ(L)(L−)2]− → [CoΙ(L−)2]− + L. For bis chelate complexes, three electron transfer processes associated with the redox couples [CoΙΙ(L)2]/[CoIII(L)2]3+, [CoΙΙ(L)2]2+/[CoΙ(L)2]+, and [CoΙ(L)2]+/[CoΙ(L)(L−)] were registered, including a coupled chemical reaction only for the complex containing the ligand 4-chloro-terpyridine. Foot to the wave analysis (FOWA) obtained from cyclic voltammetry experiments allowed us to calculate the catalytic rate constant (k) for the molecular catalysis of CO2 reduction. The complex [Co(3,4,7,8-tm-1,10-phen)3]2+ presented a high k value; moreover, the complex [Co(4-Cl-terpy)3]2+ did not show catalytic activity, indicating that the more negative redox potential and the absence of the coupled chemical reaction increased the molecular catalysis. Density functional theory (DFT) calculations for compounds and CO2 were obtained to rationalize the effect of electronic structure on the catalytic rate constant (k) of CO2 reduction.

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

Anion and solvent controlled growth of crystalline and amorphous zinc(II) coordination polymers and a molecular complex

2021 ◽  
Author(s):  
Claire Deville ◽  
Henrik Særkjær Jeppesen ◽  
Vickie McKee ◽  
Nina Lock
Keyword(s):  
Coordination Polymers ◽  
Molecular Complex ◽  
Research Field ◽  
Metal Coordination ◽  
Controlled Growth ◽  
Bottom Up ◽  
One Dimensional

Controlled bottom-up synthesis of amorphous coordination polymers with tailored metal coordination is a research field in its infancy. In this study, synthesis control was achieved to selectively prepare one-dimensional (1D)...

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