Search results for "Ordination"
showing 10 items of 1367 documents
Coordination Chemistry of a Bis(Tetrazine) Tweezer: A Case of Host-Guest Behavior with Silver Salts
2021
The carbon-carbon cross-coupling of phenyl s-tetrazine (Tz) units at their ortho-phenyl positions allows the formation of constrained bis(tetrazines) with original tweezer structures. In these compounds, the face-to-face positioning of the central tetrazine cores is reinforced by π-stacking of the electron-poor nitrogen-containing heteroaromatic moieties. The resulting tetra-aromatic structure can be used as a weak coordinating ligand with cationic silver. This coordination generates a set of bis(tetrazine)-silver(I) coordination complexes tolerating a large variety of counter anions of various geometries, namely, PF6−, BF4−, SbF6−, ClO4−, NTf2−, and OTf−. These compounds were characterized…
Studies on high speed uplink packet access performance enhancements
2014
New Microbe Killers : Self-Assembled Silver(I) Coordination Polymers Driven by a Cagelike Aminophosphine
2019
New Ag(I) coordination polymers, formulated as [Ag(μ-PTAH)(NO3)2]n (1) and [Ag(μ-PTA)(NO2)]n (2), were self-assembled as light- and air-stable microcrystalline solids and fully characterized by NMR and IR spectroscopy, electrospray ionization mass spectrometry (ESI-MS(±), elemental analysis, powder (PXRD) and single-crystal X-ray diffraction. Their crystal structures reveal resembling 1D metal-ligand chains that are driven by the 1,3,5-triaza-7-phospaadamantane (PTA) linkers and supported by terminal nitrate or nitrite ligands; these chains were classified within a 2C1 topological type. Additionally, the structure of 1 features a 1D!2D network extension through intermolecular hydrogen bonds…
Catalysis Concepts in Medicinal Inorganic Chemistry
2018
Catalysis has strongly emerged in the field of medicinal inorganic chemistry as a suitable tool to deliver new drug candidates and to overcome drawbacks associated to metallodrugs. In this Concept article, we discuss representative examples of how catalysis has been applied in combination with metal complexes to deliver new therapy approaches. In particular, we explain key achievements in the design of catalytic metallodrugs that damage biomolecular targets and in the development of metal catalysis schemes for the activation of exogenous organic prodrugs. Moreover, we discuss our recent discoveries on the flavin-mediated bioorthogonal catalytic activation of metal-based prodrugs; a new cata…
A particular coordination structure of Indo-European flavour
2005
The article aims to account for the various, often unexpected positions of the conjunction in coordinated constructions of ancient Indo-European languages, among them Hittite, Ancient Greek, Latin and Vedic Sanskrit. The coordination possibilities of ancient Indo-European languages are derived from the binary branching hypotheses of Universal Grammar, with the result that not only seemingly idiosyncratic facts of a number of languages receive a principled explanation, but also a speculative hypothesis of Universal Grammar receives empirical support; ancient Indo-European languages realize possibilities that are derivable from the Munn-Kayne theory but have not been attested so far.
Multiproperty complexes of 4d and 4f metal ions based on biomolecules: from fundamental research to potential applications
2023
El trabajo desarrollado en esta Tesis se enmarca en el campo de la Química de Coordinación y el Magnetismo Molecular, vectores base para el desarrollo de múltiples aplicaciones en Nanomedicina y Nanotecnología. El estudio de los compuestos de coordinación tiene una larga historia que se remonta a principios del siglo XIX, con notables contribuciones de químicos como Berzelius y Jørgensen. Esta rama de la química se centra en la comprensión de las propiedades de unión de los ligandos (moléculas o aniones donadores de electrones) a los iones metálicos. Las teorías de Alfred Werner sobre la coordinación de iones metálicos a principios del siglo XX marcaron un hito importante en este campo. El …
Bioinorganic Chemistry Chapter 1
2018
Tema 1 de la part de Bioinorgànica de l'assignatura Química Inorgànica Avançada Chapter 1 of the Bioinorganic part of the course on Advanced Inorganic Chemistry
Essays on labour market institutions and macroeconomic dynamics
2019
Labour market reforms play an important role in the public debate and policy recommendations. This thesis aims to find evidence on how labour market institutions are related to economic dynamics and adjustment. The thesis contains an introductory chapter and three essays. The first essay uses data of OECD countries to study whether differences in labour market institutions explain the differences in business cycle dynamics across OECD countries. The second and third essays use theoretical models to study centralized wage-setting and wage-setting coordination. The results of the first essay suggest that labour market institution variables have explanatory power for the heterogeneity in the v…
Improving IEEE 802.11 Performance in Chain Topologies through Distributed Polling and Network Coding
2009
Wireless multi-hop networks often rely on the use of IEEE 802.11 technology. Despite of the robustness of the IEEE 802.11 Distributed Coordination Function (DCF) for working in various network scenarios, it has been proven that critical inefficiencies can arise in the case of multi-hop packet forwarding. In this paper, we propose a MAC scheme, based on the virtualization of the Point Coordination Function, optimized for working on chain topologies with bidirectional traffic flows. Our scheme is based on a token-like access mechanism coupled with network coding. The basic idea is the use of multiple Point Coordinators (PCs) along the node chain, which are elected by passing special token fra…
The Role of Chronic Physical Activity in Alleviating the Detrimental Relationship of Childhood Obesity on Brain and Cognition
2021
Shu-Shih Hsieh was supported by the Postdoctoral Research Abroad Program from the Ministry of Science and Technology in Taiwan (reference number: 109-2917-I-564-034). Francisco B. Ortega's research activity was supported by funds from Spanish Ministry of Economy and Competitiveness (Reference number: DEP2016-79512-R and DEP2017-91544-EXP) and the Andalusian Operational Programme supported with European Regional Development Funds (ERDF in English, FEDER in Spanish, project ref: B-CTS-355-UGR18).