Iron-molybdenum-sulphur clusters

1982 ◽  
Vol 308 (1501) ◽  
pp. 159-166 ◽  
Keyword(s):  
Physical Properties ◽  
Bidentate Ligand ◽  
Molybdenum Cofactor ◽  
Synthesis And Characterization ◽  
Iron Molybdenum Cofactor

The recognition that molybdenum is present in the nitrogenase enzymes as an extractable cofactor, containing iron, molybdenum and sulphur in the ratios 6-8:1:4-6, has stimulated investigations concerned with the synthesis and characterization of compounds containing these three elements. This paper describes the preparation and structure of complexes containing an Fe-M o-S framework, most of these systems being classified according to whether they contain a MoS 4 group coordinated as a bidentate ligand to one or two iron atoms, or an Fe 3 MoS 4 cubane-like cluster. Several physical properties of these complexes are presented, with reference to the corresponding properties of the iron-molybdenum cofactor of the nitrogenases, especially for those complexes that contain a pair of Fe 3 MoS 4 cubane-like clusters.

Synthesis and Characterization of Co(II) Coordination Polymer with a Flexible Bidentate Ligand

2019 ◽  
Vol 64 (7) ◽  
pp. 1084-1088
Author(s):  
Mehdi Khalaj ◽  
Arash Lalegani ◽  
Krzysztof Lyczko ◽  
Janusz Lipkowski
Keyword(s):  
Coordination Polymer ◽  
Bidentate Ligand ◽  
Synthesis And Characterization

Towards the Synthesis of Mono- and Bi-Functional Amphiphilic Oligothiophenes: Organic Materials for Opto-Electronic Applications

1999 ◽  
Vol 561 ◽  
Author(s):  
R.C. Advincula ◽  
S. Inaoka ◽  
M. Park ◽  
D. Phillips ◽  
D.M. Shin
Keyword(s):  
Physical Properties ◽  
Ultrathin Films ◽  
Organic Materials ◽  
Photophysical Properties ◽  
Electronic Devices ◽  
Synthesis And Characterization ◽  
Important Class ◽  
Maldi Tof Ms ◽  
Tof Ms

ABSTRACTIn this report, we describe our initial synthesis and characterization of mono-functional and bi-functional dibromoalkyl oligothiophenes to achieve amphiphilicity and telechelic functionality. Oligothiophenes are an important class of organic materials for opto-electronic devices and display applications. We have mono-functionalized oligothiophenes by the synthesis of a quinquethiophene bromoalkyl derivative. A bi-functional sexithiophene was derived primarily by the symmetrical coupling of terthiophene derivatives. Both were synthesized using Grignard coupling and lithiation reaction methodologies. UV-Vis, IR, NMR, MALDI-TOF-MS, and DSC confirmed the structure and physical properties of the oligomers. In addition, we have also synthesized an amphiphilic diamine derivative from the reaction of hexamethylenediamine with a bromoalkyl terthiophene derivative. Using photoluminescence, the photophysical properties of the oligomers were found to be that of typical oligothiophenes. Processing as ultrathin films for devices is currently being investigated.

Spectroscopic Characterization of the Isolated Iron-Molybdenum Cofactor (FeMoco) Precursor from the Protein NifEN

2011 ◽  
Vol 123 (34) ◽  
pp. 7933-7936 ◽  
Author(s):  
Aaron W. Fay ◽  
Michael A. Blank ◽  
Chi Chung Lee ◽  
Yilin Hu ◽  
Keith O. Hodgson ◽  
...  
Keyword(s):  
Spectroscopic Characterization ◽  
Molybdenum Cofactor ◽  
Iron Molybdenum Cofactor

Synthesis and Physical Properties of Skutterudite Superlattices

2000 ◽  
Vol 626 ◽  
Author(s):  
Joshua R. Williams ◽  
David C. Johnson ◽  
Michael Kaeser ◽  
Terry Tritt ◽  
George Nolas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
High Temperatures ◽  
Synthesis And Characterization ◽  
Superlattice Structure

ABSTRACTPredicted and observed reductions in thermal conductivity of materials with superlattice structure have prompted interesting research into the possibility of using these materials as higher efficiency thermoelectrics. Synthesis of superlattice materials is challenging however, as the structure itself is generally not very stable at high temperatures as it is prone to interdiffusion. Presented here is the successful synthesis and characterization of a superlattice composed of two materials with the skutterudite structure, IrSb3 and CoSb3.

Synthesis and characterization of photocrosslinkable albumin-based hydrogels for biomedical applications

Soft Matter ◽  
2020 ◽  
Vol 16 (40) ◽  
pp. 9242-9252
Author(s):  
Darlin Lantigua ◽  
Michelle A. Nguyen ◽  
Xinchen Wu ◽  
Sanika Suvarnapathaki ◽  
Seongjin Kwon ◽  
...  
Keyword(s):  
Physical Properties ◽  
Glycidyl Methacrylate ◽  
Biomedical Applications ◽  
Synthesis And Characterization

Modulating the levels of glycidyl methacrylate modification in the BSAGMA prepolymer yields hydrogel products with tunable physical properties and enhanced biocompatibility, making BSAGMA hydrogels suitable for a range of biomedical applications.

The Synthesis and Characterization of a Novel Block Copolymer Consisting of Poly(Propylene Fumarate) and Poly(Ethylene Oxide)

1995 ◽  
Vol 394 ◽  
Author(s):  
Laura J. Suggs ◽  
Richard G. Payne ◽  
Edmund Y. Kao ◽  
Lawrence B. Alemany ◽  
Michael J. Yaszemski ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Physical Properties ◽  
Synthesis And Characterization ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Poly Propylene

A block copolymer was developed consisting of poly(propylene fumarate) (PPF) and poly(ethylene oxide) (PEO) blocks. The former component allows the copolymer to be crosslinked, while the latter component allows the physical properties to be controlled. The compositions and segmental lengths of the two components were varied, and the copolymer was subsequently characterized.

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