scholarly journals Metal Salen- and Salphen-Containing Organic Polymers: Synthesis and Applications

2020 ◽  
Vol 02 (02) ◽  
pp. 182-203
Author(s):  
Sven M. Elbert ◽  
Michael Mastalerz
Keyword(s):  
Heterogeneous Catalysis ◽  
Functional Groups ◽  
Polymeric Materials ◽  
Building Blocks ◽  
Luminescent Materials ◽  
Organic Polymers ◽  
Gas Sorption ◽  
Metal Centers ◽  
Potential Applications ◽  
2D And 3D

The properties of organic polymeric materials can be chemically fine-tuned by the implementation of functional groups or units within the backbone. Especially the inclusion of coordinated metal centers offers a nearly infinite toolbox to adjust properties and thus potential applications. In particular, salen and salphen complexes are widely known to be highly efficient homogenous catalysts. They are also used as luminescent materials and devices or as supramolecular building blocks. This review focusses on the class of salen- and salphen-containing organic polymers, from 1D to 3D. Besides the comparison of synthetic polymerization methods, properties and applications are discussed, with an emphasis on porous 2D and 3D polymeric metal salphens and salens for heterogeneous catalysis and gas sorption.

Triazine-based covalent organic polymers: design, synthesis and applications in heterogeneous catalysis

2016 ◽  
Vol 4 (42) ◽  
pp. 16288-16311 ◽  
Author(s):  
Pillaiyar Puthiaraj ◽  
Yu-Ri Lee ◽  
Siqian Zhang ◽  
Wha-Seung Ahn
Keyword(s):  
Heterogeneous Catalysis ◽  
Chemical Reactions ◽  
Potential Application ◽  
Building Blocks ◽  
Organic Polymers ◽  
Design Synthesis

The development of triazine-based COPs using different building blocks or alternative synthetic chemical reactions and their potential application in heterogeneous catalysis.

scholarly journals Recent Advances in Crystalline Oxidopolyborate Complexes of d-Block or p-Block Metals: Structural Aspects, Syntheses, and Physical Properties

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3815
Author(s):  
Shu-Sheng Xin ◽  
Ming-Hua Zhou ◽  
Michael A. Beckett ◽  
Chun-Yang Pan
Keyword(s):  
Physical Properties ◽  
Hybrid Materials ◽  
Building Blocks ◽  
Spectroscopic Properties ◽  
Organic Metal ◽  
Metal Centers ◽  
Crystalline Materials ◽  
Potential Applications ◽  
Synthetic Approaches ◽  
Structural Aspects

Crystalline materials containing hybrid inorganic–organic metal borates (complexes with oxidoborate ligands) display a variety of novel framework building blocks. The structural aspects of these hybrid metallaoxidoborates containing Cd(II), Co(II), Cu(II), Ga(III), In(III), Mn(II), Ni(II) or Zn(II) metal centers are discussed in this review. The review describes synthetic approaches to these hybrid materials, their physical properties, their spectroscopic properties and their potential applications.

scholarly journals New terpyridine-(β-diketonate)-copper(II) complex. Structure and magnetism

2014 ◽  
Vol 70 (a1) ◽  
pp. C1262-C1262
Author(s):  
Dominique Toledo ◽  
Yanko Moreno ◽  
Octavio Peña ◽  
Ricardo Baggio ◽  
Andrés Vega
Keyword(s):  
Magnetic Measurements ◽  
Complex Structure ◽  
Copper Ion ◽  
Functional Materials ◽  
Building Blocks ◽  
Magnetic Behaviour ◽  
Redox Activity ◽  
Metal Centers ◽  
Design And Synthesis ◽  
Potential Applications

Over the last decade the design and synthesis of metal-organic compounds with fascinating structural properties and potential applications as functional materials has been a major challenge in various fields of research.1Strategies for preparing these compounds are based on the careful selection of the constituent building blocks. 4'-(substituted)-4,2':6',4''-terpyridine ligands are considered versatile building blocks for the assembly of coordination polymers and networks with useful solid-state properties, such as magnetism, luminescence, redox activity, etc.2The divergent arrangements of N-donor atoms and the attachment of aryl substituents into the 4'-position of 4,2':6',4''-terpyridine allow to bridge two or more metal centers, giving rise to molecular assemblies of 1, 2 or 3 dimensions.3Our line of interest is the obtainment of compounds with emergent magnetic properties. Herein we present a copper complex surveying the new 4'-(quinolin-4-yl)-4,2':6',4''-terpyridine ligand (L), and formulated as [Cu(C5H1F6O2)2(C25H16N4·CHCl3)]n which was produced from the reaction of two equivalents of L with Cu(hfac)2, (hfac=hexafluoroacetylacetonate). The copper ion in trans-{CuN2(hfac)2} has an octahedral environment. The nitrogen atoms of the terminal pyridine rings coordinate to the paramagnetic centres, while the central ring remains uncoordinated. The linkage of the resulting polyhedra gives raise to an undulating 1D polymeric structure. Within these chains there are two main non-covalent interactions: π-stacking between the quinoline substituents and the pyridine rings and CH···F interactions due to CF3group of the hfac ligand. There are also weak CH···N, CH···π and π-π intermolecular interactions linking the L and CHCl3groups, which give stability to the crystal structure. Finally, we performed magnetic measurements, in order to determine the magnetic behaviour of our system. Acknowledgments: FONDECYT 1130433 project, CIPA of University of Concepción, LIA-MIF 836

scholarly journals General Synthetic Route and Structural Characterization of New 3d-4f Materials

2014 ◽  
Vol 70 (a1) ◽  
pp. C1775-C1775
Author(s):  
Andres Vega ◽  
Bianca Baldo ◽  
Veronica Paredes-García ◽  
Evgenia Spodine ◽  
Diego Venegas-Yazigi
Keyword(s):  
Structural Characterization ◽  
Crystal Engineering ◽  
Three Dimensional ◽  
Building Blocks ◽  
Point Of View ◽  
Lanthanide Ions ◽  
Synthetic Route ◽  
Metal Centers ◽  
Design And Synthesis ◽  
Potential Applications

Within the field of coordination chemistry, the crystal engineering has been applied mainly through the design and synthesis of Metal-Organic Materials (MOMs), which are attractive not only by the wide variety of architectures and topologies that they present, but also by the potential applications in catalysis, ion exchange, molecular adsorption, fluorescence, nonlinear optics, and magnetism. From a structural and synthetic point of view, the literature shows that a wide variety of MOMs ranging from 0D to 3D structures have been rationally designed and synthesized by the appropriate selection of the metal centers and organic building blocks, as well as of the reaction pathways.1-3 In this work, we present the a general synthetic route and the structural characterization to a new MII(3d)-M'III(4f) (M = Co, Ni ; M' = Ce) MOMs. The assembly of paramagnetic ions of transition metal centers together with simple and versatile ligands permits to obtain this new heterometallic three dimensional structures. From a structural point of view, the 3D MOM, present a cubic structure and crystallizes in the Fm-3m spatial group. Details of synthetic methodology and structural characteristic of the synthesized MOM should be discussed. Figure 1: Lanthanide ions are cubically surrounded by transitions ions which defines a covalent cubic tridimensional lattice. Acknowledgements: The authors acknowledge financial support from FONDECYT 1130643 and Financiamiento Basal, FB0807. B.B. thanks UNAB Doctoral Scholarship 2013 and CONICYT Fellowship.

Novel organic, polymeric materials for electronics applications

2002 ◽  
Vol 722 ◽  
Author(s):  
Ram W. Sabnis ◽  
Mary J. Spencer ◽  
Douglas J. Guerrero
Keyword(s):  
Optical Density ◽  
Chemical Vapor ◽  
Polymeric Materials ◽  
Substantial Improvement ◽  
Polymeric Systems ◽  
Patterned Wafers ◽  
Visible Spectra ◽  
Potential Applications ◽  
Deep Ultraviolet ◽  
Deposited Films

AbstractNovel organic, polymeric materials and processes of depositing thin films on electronics substrates by chemical vapor deposition (CVD) have been developed and the lithographic behavior of photoresist coated over these CVD films at deep ultraviolet (DUV) wavelength has been evaluated. The specific monomers synthesized for DUV applications include [2.2](1,4)- naphthalenophane, [2.2](9,10)-anthracenophane and their derivatives which showed remarkable film uniformity on flat wafers and conformality over structured topography wafers, upon polymerization by CVD. The chemical, physical and optical properties of the deposited films have been characterized by measuring parameters such as thickness uniformity, solubility, conformality, adhesion to semiconductor substrates, ultraviolet-visible spectra, optical density, optical constants, defectivity, and resist compatibility. Scanning electron microscope (SEM) photos of cross-sectioned patterned wafers showed verticle profiles with no footing, standing waves or undercut. Resist profiles down to 0.10 νm dense lines and 0.09 νm isolated lines were achieved in initial tests. CVD coatings generated 96-100% conformal films, which is a substantial improvement over commercial spin-on polymeric systems. The light absorbing layers have high optical density at 248 nm and are therefore capable materials for DUV lithography applications. CVD is a potentially useful technology to extend lithography for sub-0.15 νm devices. These films have potential applications in microelectronics, optoelectronics and photonics.

A Practical and General Approach to the Late-Stage Functionalization of Complex Sulfonamides

2019 ◽  
Author(s):  
Patrick Fier ◽  
Kevin M. Maloney
Keyword(s):  
Functional Groups ◽  
Late Stage ◽  
Building Blocks ◽  
Pharmaceutical Compounds ◽  
Stage Conversion

Herein we describe the development and application of a method for the mild, late-stage conversion of primary sulfonamides to several other other functional groups. These reactions occur via initial reductive deamination of sulfonamides to sulfinates via an NHC-catalyzed reaction of transiently formed <i>N</i>-sulfonylimines. The method described here is tolerant of nearly all common functional groups, as exemplified by the late-stage derivatization of several complex pharmaceutical compounds. Based on the prevalence of sulfonamide-containing drugs and building blocks, we have developed a method to enable sulfonamides to be applied as versatile synthetic handles for synthetic chemsitry.

A Practical and General Approach to the Late-Stage Functionalization of Complex Sulfonamides

2019 ◽  
Author(s):  
Patrick Fier ◽  
Kevin M. Maloney
Keyword(s):  
Functional Groups ◽  
Late Stage ◽  
Building Blocks ◽  
Pharmaceutical Compounds ◽  
Stage Conversion

Herein we describe the development and application of a method for the mild, late-stage conversion of primary sulfonamides to several other other functional groups. These reactions occur via initial reductive deamination of sulfonamides to sulfinates via an NHC-catalyzed reaction of transiently formed <i>N</i>-sulfonylimines. The method described here is tolerant of nearly all common functional groups, as exemplified by the late-stage derivatization of several complex pharmaceutical compounds. Based on the prevalence of sulfonamide-containing drugs and building blocks, we have developed a method to enable sulfonamides to be applied as versatile synthetic handles for synthetic chemsitry.

scholarly journals Non-Enzymatic Desymmetrization Reactions in Aqueous Media

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 720
Author(s):  
Satomi Niwayama
Keyword(s):  
Natural Products ◽  
Total Synthesis ◽  
Functional Groups ◽  
Organic Compounds ◽  
Recent Progress ◽  
Aqueous Media ◽  
Building Blocks ◽  
Organic Reactions ◽  
Environmentally Benign ◽  
Enzymatic Desymmetrization

Symmetric organic compounds are generally obtained inexpensively, and therefore they can be attractive building blocks for the total synthesis of various pharmaceuticals and natural products. The drawback is that discriminating the identical functional groups in the symmetric compounds is difficult. Water is the most environmentally benign and inexpensive solvent. However, successful organic reactions in water are rather limited due to the hydrophobicity of organic compounds in general. Therefore, desymmetrization reactions in aqueous media are expected to offer versatile strategies for the synthesis of a variety of significant organic compounds. This review focuses on the recent progress of desymmetrization reactions of symmetric organic compounds in aqueous media without utilizing enzymes.

Carbohydrate based hyper-crosslinked organic polymers with –OH functional groups for CO2 separation

2015 ◽  
Vol 3 (42) ◽  
pp. 20913-20918 ◽  
Author(s):  
Haiying Li ◽  
Bo Meng ◽  
Shannon M. Mahurin ◽  
Song-Hai Chai ◽  
Kimberly M. Nelson ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Functional Groups ◽  
Carbon Capture ◽  
Carbon Capture And Storage ◽  
Co2 Separation ◽  
Organic Polymers ◽  
Microporous Polymers ◽  
Quadrupole Interactions ◽  
And Storage

A class of novel hyper-crosslinked microporous polymers, based on green and renewable carbohydrates, was synthesized for carbon capture and storage with high CO2/N2 selectivity by hydrogen bonding and dipole–quadrupole interactions.

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