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Steven J. Rettig

Bio: Steven J. Rettig is an academic researcher from University of British Columbia. The author has contributed to research in topics: Crystal structure & Ligand. The author has an hindex of 57, co-authored 589 publications receiving 13138 citations. Previous affiliations of Steven J. Rettig include Braunschweig University of Technology.


Papers
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Journal ArticleDOI
07 Mar 1997-Science
TL;DR: In this article, the reaction of dihydrogen with a side-on bound dinitrogen complex of zirconium was investigated and a complex containing both a bridging hydride and bridging hydrazido unit with a nitrogen-hydrogen bond was observed.
Abstract: The reaction of dihydrogen with a side-on bound dinitrogen complex of zirconium was investigated. Instead of a displacement of the dinitrogen moiety, which is the common mode of reactivity, a complex containing both a bridging hydride and a bridging hydrazido unit with a nitrogen-hydrogen bond was observed. This reaction was extended to primary silanes to produce a species that contained a nitrogen-silicon bond. In addition, an intermediate in the dihydrogen addition has been structurally characterized as having a bridging dihydrogen unit.

343 citations

Journal ArticleDOI
TL;DR: In this paper, the synthesis and characterization of potentially heptadentate (N{sub 4}O{sub 3}) amine phenols and a series of their mononuclear and dinuclear lanthanide complexes are reported.
Abstract: The synthesis and characterization of three potentially heptadentate (N{sub 4}O{sub 3}) amine phenols and of a series of their mononuclear and dinuclear lanthanide complexes are reported. The heptadentate ligands are KBH{sub 4} reduction products of the Schiff bases derived from the condensation reactions of tris(2-aminoethyl)amine with 3 equiv of a salicylaldehyde compound. The reaction of an amine phenol with 1 equiv of a lanthanide (Ln) nitrate produces the mononuclear complex [Ln(H{sub 3}L)(NO{sub 3}{sub 3})]; homodinuclear complexes [Ln(l)]{sub 2} were obtained from the reaction of lanthanide salts with the respective ligand in the presence of a base (hydroxide or acetate). The X-ray structure of [Gd(L1)]{sub 2}{center_dot}2CHCl{sub 3} (H{sub 3}L1 = tris(((2-hydroxybenzyl)amino)ethyl)amine) has been determined; it is first structurally characterized example of an [Ln(L)]{sub 2} complex, a homodinuclear eight-coordinate lanthanide complex [Ln(L)]{sub 2} with heptadentate ligands only. The structure was solved by conventional heavy-atom methods and was refined by full-matrix least-squares procedures. The dinuclear complex [Gd(L1)]{sub 2} {center_dot}2CHCl{sub 3} has a distorted bicapped octahedral (or cubic) coordination geometry around each gadolinium atom which is coordinated by an N{sub 4}O{sub 4} donor set. The two gadolinium atoms are bridged by two phenolate O atoms, one from each heptadentate ligand. Room-temperature magnetic susceptibilities ofmore » some of the mononuclear and homodinuclear complexes give no indication of magnetic interaction between the two Ln{sup 3{minus}} ions and are discussed in relation to their structures. A variable-temperature (4.2-82 K) magnetic susceptibility study of the [Gd(L1)]{sub 2}{center_dot}2CHCl{sub 3} complex revealed a good fit of the data to two very weakly antiferromagnetically coupled S= 7/2 ions (g = 2.00, - J = 0.045 (1) cm{sup {minus}1}). 38 refs., 2 figs., 10 tabs.« less

194 citations

Journal ArticleDOI
TL;DR: The meso-phenyldipyrromethanes can be oxidized by 2,6-dicyano-3,5-dichloro-para-benzoquinone (DDQ).
Abstract: meso-Phenyldipyrromethanes can be oxidized by 2,6-dicyano-3,5-dichloro-para-benzoquinone (DDQ) to the corresponding meso-phenyldipyrrins. As expected, these novel, stable bipyrrolic pigments readil...

153 citations


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TL;DR: Study of the gas adsorption and thermal and chemical stability of two prototypical members, ZIF-8 and -11, demonstrated their permanent porosity, high thermal stability, and remarkable chemical resistance to boiling alkaline water and organic solvents.
Abstract: Twelve zeolitic imidazolate frameworks (ZIFs; termed ZIF-1 to -12) have been synthesized as crystals by copolymerization of either Zn(II) (ZIF-1 to -4, -6 to -8, and -10 to -11) or Co(II) (ZIF-9 and -12) with imidazolate-type links. The ZIF crystal structures are based on the nets of seven distinct aluminosilicate zeolites: tetrahedral Si(Al) and the bridging O are replaced with transition metal ion and imidazolate link, respectively. In addition, one example of mixed-coordination imidazolate of Zn(II) and In(III) (ZIF-5) based on the garnet net is reported. Study of the gas adsorption and thermal and chemical stability of two prototypical members, ZIF-8 and -11, demonstrated their permanent porosity (Langmuir surface area = 1,810 m 2 /g), high thermal stability (up to 550°C), and remarkable chemical resistance to boiling alkaline water and organic solvents.

5,512 citations

Journal ArticleDOI
TL;DR: Biomass is an important feedstock for the renewable production of fuels, chemicals, and energy, and it recently surpassed hydroelectric energy as the largest domestic source of renewable energy.
Abstract: Biomass is an important feedstock for the renewable production of fuels, chemicals, and energy. As of 2005, over 3% of the total energy consumption in the United States was supplied by biomass, and it recently surpassed hydroelectric energy as the largest domestic source of renewable energy. Similarly, the European Union received 66.1% of its renewable energy from biomass, which thus surpassed the total combined contribution from hydropower, wind power, geothermal energy, and solar power. In addition to energy, the production of chemicals from biomass is also essential; indeed, the only renewable source of liquid transportation fuels is currently obtained from biomass.

3,644 citations

Journal ArticleDOI
TL;DR: In this paper, the development in the field of coordination polymers or metal-organic coordination networks, MOCNs (metal-organic frameworks, MOFs) is assessed in terms of property investigations in the areas of catalysis, chirality, conductivity, luminescence, magnetism, spin-transition (spin-crossover), nonlinear optics (NLO) and porosity or zeolitic behavior upon which potential applications could be based.
Abstract: The development in the field of coordination polymers or metal-organic coordination networks, MOCNs (metal-organic frameworks, MOFs) is assessed in terms of property investigations in the areas of catalysis, chirality, conductivity, luminescence, magnetism, spin-transition (spin-crossover), non-linear optics (NLO) and porosity or zeolitic behavior upon which potential applications could be based.

3,117 citations

Journal ArticleDOI
TL;DR: A review of the synthesis, structure, and properties of metal-organic frameworks (MOFs) is presented in this paper, highlighting the important advances in their research over the past decade.

2,485 citations

Journal ArticleDOI
TL;DR: The diversity of magnetic exchange interactions between nearest-neighbour moment carriers is examined, covering from dimers to oligomers and their implications in infinite chains, layers and networks, having a variety of topologies.
Abstract: The purpose of this critical review is to give a representative and comprehensive overview of the arising developments in the field of magnetic metal–organic frameworks, in particular those containing cobalt(II). We examine the diversity of magnetic exchange interactions between nearest-neighbour moment carriers, covering from dimers to oligomers and discuss their implications in infinite chains, layers and networks, having a variety of topologies. We progress to the different forms of short-range magnetic ordering, giving rise to single-molecule-magnets and single-chain-magnets, to long-range ordering of two- and three-dimensional networks (323 references).

2,238 citations