Special Issue "Organometallic Compounds"

Guest Editor
Prof. Dr. Jun Okuda
Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
Website: http://www.ac.rwth-aachen.de/extern/ak-okuda/index.html
E-Mail:
Interests: organometallic chemistry and homogeneous catalysis; polyolefins; biodegradable polymers; new homogeneous catalysts

Dear Colleagues,

Organometallic compounds, molecules that contain at least one metal-carbon or metal-hydrogen bond, have had an enormous impact on the development of homogeneous catalysts. Such molecularly well-defined catalysts have revolutionized organic synthesis by achieving efficiency and selectivity not achieved before. Organometallic compounds have also influenced material synthesis: Areas that have profited from the ready availability of volatile, stoichiometrically precisely defined molecular compounds of the metallic elements including synthesis of materials (metals, alloys, semi-conductors) by vapor deposition, of new molecular magnetic and electro optical materials (non-linear optics), of metal-organic frameworks as gas adsorbents, of metal-containing polymers, and of metallomeogens. The usefulness of organometallic compounds also expands beyond homogeneous catalysts to molecular-defined supported catalysts which are expected to combine the precise mechanistic feature of homogeneous systems with the robustness of heterogeneous catalysts. Thus organometallic compounds are currently finding wider applications in material synthesis as well. This special issue invites contributions from areas where well-defined organometallic compounds contributed to the area of advanced material synthesis.

Prof. Dr. Jun Okuda
Guest Editor

Submission

All papers should be submitted to materials@mdpi.org. To be published continuously until the deadline and papers will be listed together at the special website.

Submitted papers should not have been published previously, nor be under consideration for publication elsewhere. All papers are refereed through a peer-review process. A guide for authors is available on the Instructions for Authors page. Materials is an international peer-reviewed quarterly journal published by Molecular Diversity Preservation International. Review manuscripts: Before writing their manuscripts, potential authors of review articles should forward the title and a short abstract to materials@mdpi.org. We will then provide feedback on the suitability of the topic.

Open Access publication fees are 300 CHF per paper. English correction fees and/or formatting fees (250 CHF) will be added in certain cases (550 CHF per paper for those papers that require extensive additional formatting and/or English corrections).

Starting 1 January 2010, Article Processing Charges are of 800 CHF per accepted article for Materials

• metal-carbon bond
• MOCVD
• non-linear optics
• MOF
• supported catalysts
• conducting polymers
• molecular magnets
• metallomeogens

Feature Papers

Type of Paper: Article
Title: Sn, Sb and Bi Containing Element Organic Frameworks with Permanent Porosity and High Catalytic Activity
Authors: Julia Fritsch, Marcus Rose and Stefan Kaskel *
Affiliation: Department of Inorganic Chemistry, Dresden University of Technology, Mommsenstraße 6, D-01069 Dresden
Abstract: In this work we present new element organic frameworks based on Sn, Sb and Bi atoms connected via organic linkers by direct element-carbon bond. The frameworks are characterized by specific surface areas (BET) of up to 400 m²·g^-1 and a good stability under ambient conditions resulting from a highly hydrophobic inner surface. They show good performance as heterogeneous catalysts in the cyanosilylation of benzaldehyde as test reaction. Due to their catalytic activity, this class of materials might be able to replace common homogeneous element-organic and often highly toxic catalysts especially in the food industry.

Regular Papers

Type of Paper: Article
Title: Of Rings, Chains, Helices and Double-Helices: Synthetic Strategies and Theoretical Investigations for Tuning the Structure of Silver Coordination Compounds
Author: Katharina M. Fromm
Affiliation: University of Fribourg, Department of Chemistry, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
Abstract: Varying the polyethyleneglycol spacer between two (iso)-nicotinic groups of the ligand systems, a large structural variety of silver coordination compounds was obtained, starting with zero-dimensional ring systems, via one-dimensional chains, helices and double-helices to two-dimensional polycatenanes. Theoretical calculations help to understand their formation and allow predictions in some cases. These structures can be tuned by careful design of the ligand, the use of solvent and the counter ions, influencing also other important properties such as light stability and solubility. The latter is important in the context of biomedical applications, using silver compounds as antimicrobial agents.

Type of Paper: Review
Title: Modern Organobismuth Chemistry
Author: Robert Stockland
Affiliation: Department of Chemistry, Bucknell University, Lewisburg, PA 17837, USA
Abstract: Compared with the myriad of papers on the use of organometallic palladium, rhodium, and platinum complexes in synthesis, the scant number of reports on the use of organobismuth complexes as catalysts and reagents for synthetic manipulations defines it to be an underutilized resource. Furthermore, the relative low toxicity of bismuth makes it attractive for a range of applications. This review will outline historical and modern synthetic methodology for the preparation of organobismuth complexes as well as the solution and solid state characterization of the resulting organometallic complexes. Recent applications using organobismuth compounds in the preparation of novel synthetic targets and materials will be described.

Type of Paper: Article
Authors: Takashi Yumura et al.
Title: The Variety of Carbon-Metal Bonds Formed inside ZSM-5 Zeolite: A Density Functional Theory Study
Affiliation: Department of Chemistry and Materials Technology , Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan; E-mail: yumura@chem.kit.ac.jp
Abstract: We performed density functional theory (DFT) calculations to investigate interactions between a guest hydrocarbon (methane or ethyne) and an extraframework copper cation inside a ZSM-5 cavity consisting of its ten-membered ring. The ZSM-5 cavity contains at least three binding sites for an extraframework cation. For comparison the interactions with the Xe atom instead of methane were also studied, because both have same size. The DFT calculations demonstrate that there are various binding fashions of a hydrocarbon, depending on the copper coordination environments together with the number of extraframework copper cations bound to a hydrocarbon.

Type of Paper: Research Article
Title: Silicoaluminates as Activating-Supports in the Polyolefin Materials Synthesis Reaction
Authors: Vanesa Tabernero and Tomas Cuenca Agreda
Affiliation: Departamento de Química Inorgánica, Universidad de Alcalá, E 28871 Alcalá de Henares (Madrid), Spain
Abstract: In this work, we report results on the polymerization behaviour as activating-support of various natural clays (montmorillonites, MMT) or artificial silicates (SBA 15). These silicates have been modified by treatment with different aluminium compounds in order to get enriched aluminium clay in the first case and an aluminium-silicate in the last case. As a consequence, the Brönsted/Lewis acidity and the intrinsic structural properties of the starting materials have been changed. These new materials have been used as activating-support for the ethylene polymerization using zirconocene complexes as precatalyst systems.