Stoichiometry-controlled FeP nanoparticles synthesized from a single source precursor

Phase-pure FeP nanoparticles (NPs) have been synthesized through low temperature thermolysis of the single source precursor [(CO)4Fe(PH3)]. Examination of the mechanism demonstrates the central role of the labile CO ligands and the weak P–H bonds to yield stoichiometry controlled FeP materials

The Crowdsourced Replication Initiative: Investigating Immigration and Social Policy Preferences. Executive Report.

In an era of mass migration, social scientists, populist parties and social movements raise concerns over the future of immigration-destination societies. What impacts does this have on policy and social solidarity? Comparative cross-national research, relying mostly on secondary data, has findings in different directions. There is a threat of selective model reporting and lack of replicability. The heterogeneity of countries obscures attempts to clearly define data-generating models. P-hacking and HARKing lurk among standard research practices in this area.This project employs crowdsourcing to address these issues. It draws on replication, deliberation, meta-analysis and harnessing the power of many minds at once. The Crowdsourced Replication Initiative carries two main goals, (a) to better investigate the linkage between immigration and social policy preferences across countries, and (b) to develop crowdsourcing as a social science method. The Executive Report provides short reviews of the area of social policy preferences and immigration, and the methods and impetus behind crowdsourcing plus a description of the entire project. Three main areas of findings will appear in three papers, that are registered as PAPs or in process

Medizinische Vorrichtung zum Durchführen einer Biopsie und Verfahren zum Herstellen der medizinischen Vorrichtung

Die vorliegende Erfindung betrifft eine medizinische Vorrichtung zum Durchführen einer Biopsie an einem Bereich (2) eines zu untersuchenden Körpers (8) und ein Verfahren zum Herstellen der medizinischen Vorrichtung. Die medizinische Vorrichtung weist mindestens drei Anschlusselementen (1) zum Anbringen der Vorrichtung an dem Bereich (2) des Körpers (8) oder zum Anbringen der Vorrichtung an Verankerungselemente, die an dem Bereich (2) des Körpers (8) angeordnet sind, eine Hülse (3) als Führung für ein medizinisches Instrument (6), und ein Verbindungselement (4) auf, durch das die mindestens drei Verankerungselemente (1) mit der Hülse (3) verbunden sind. Zumindest das Verbindungselement (4) ist aus einem Leichtbauwerkstoff ausgebildet

Transition-Metal Complexes Containing Parent Phosphine or Phosphinyl Ligands and Their Use as Precursors for Phosphide Nanoparticles

International audienceP–H functional transition-metal complexes were synthesized without using hazardous PH3 gas in good yields by photolysis of the transition-metal carbonyl complexes M(CO)6-x (M = Cr, W, Fe; x = 0, 1) in tetrahydrofuran followed by reaction with P2(SiMe3)4 and subsequent methanolysis to give the bridging complexes [(CO)xM(μ-PH2)]2 (M = Fe, x = 3 (1), M = Cr, x = 4 (2a), M = W, x = 4 (2b)). The photolysis of [(CO)4M(μ-PH2)]2 (M = Cr (2a), M = W (2b)) with P(SiMe3)3 was applied followed by methanolysis to synthesize the PH2 bridging transition-metal binuclear complexes with terminal PH3 groups. The products [(CO)4M(μ-PH2)2M(CO)3(PH3)] (M = Cr (3a), M = W (3b)) and [(CO)4W(μ-PH2)2W(CO)2(PH3)2] (4b) were isolated in moderate yield. Another synthetic approach to this type of compounds is the direct photolysis of the complexes [(CO)3M(PH3)3] (M = Cr (5a), M = W (5b)). The products were comprehensively characterized by 31P NMR and IR spectroscopy as well as by X-ray structural analysis. Additionally, the relevancy of 2a as single source precursor for the synthesis of stoichiometry-controlled CrP nanoparticles has been demonstrated

IMIS-Beiträge Heft 23 - Themenheft: Migration - Integration - Bildung. Grundfragen und Problembereiche

Bade/Bommes: Einleitung Alba/Nee: Assimilation und Einwanderung in den USA Esser: Welche Alternativen zur Assimilation gibt es eigentlich" Kalter/Granato: Sozialer Wandel und strukturelle Assimilation in der Bundesrepublik. Empirische Befunde mit Mikrodaten der amtlichen Statistik Nauck: Familienbeziehungen und Sozialintegration von Migranten Keller: Die Rolle familiärer Beziehungsmuster für die Integration von Zuwanderern Kristen/Granato: Bildungsinvestitionen in Migrantenfamilien Radtke: Die Illusion der meritokratischen Schule. Lokale Konstellationen der Produktion von Ungleichheit im Erziehungssystem Hunger/Thränhardt: Migration und Bildungserfolg: Wo stehen wir

Transition-Metal Complexes Containing Parent Phosphine or Phosphinyl Ligands and Their Use as Precursors for Phosphide Nanoparticles

P–H functional transition-metal complexes were synthesized without using hazardous PH₃ gas in good yields by photolysis of the transition-metal carbonyl complexes M­(CO)_6‑<i>x</i> (M = Cr, W, Fe; <i>x</i> = 0, 1) in tetrahydrofuran followed by reaction with P₂(SiMe₃)₄ and subsequent methanolysis to give the bridging complexes [(CO)_<i>x</i>M­(μ-PH₂)]₂ (M = Fe, <i>x</i> = 3 (<b>1</b>), M = Cr, <i>x</i> = 4 (<b>2a</b>), M = W, <i>x</i> = 4 (<b>2b</b>)). The photolysis of [(CO)₄M­(μ-PH₂)]₂ (M = Cr (<b>2a</b>), M = W (<b>2b</b>)) with P­(SiMe₃)₃ was applied followed by methanolysis to synthesize the PH₂ bridging transition-metal binuclear complexes with terminal PH₃ groups. The products [(CO)₄M­(μ-PH₂)₂­M­(CO)₃(PH₃)] (M = Cr (<b>3a</b>), M = W (<b>3b</b>)) and [(CO)₄W­(μ-PH₂)₂W­(CO)₂(PH₃)₂] (<b>4b</b>) were isolated in moderate yield. Another synthetic approach to this type of compounds is the direct photolysis of the complexes [(CO)₃M­(PH₃)₃] (M = Cr (<b>5a</b>), M = W (<b>5b</b>)). The products were comprehensively characterized by ³¹P NMR and IR spectroscopy as well as by X-ray structural analysis. Additionally, the relevancy of <b>2a</b> as single source precursor for the synthesis of stoichiometry-controlled CrP nanoparticles has been demonstrated

Transition-Metal Complexes Containing Parent Phosphine or Phosphinyl Ligands and Their Use as Precursors for Phosphide Nanoparticles

P–H functional transition-metal complexes were synthesized without using hazardous PH₃ gas in good yields by photolysis of the transition-metal carbonyl complexes M­(CO)_6‑<i>x</i> (M = Cr, W, Fe; <i>x</i> = 0, 1) in tetrahydrofuran followed by reaction with P₂(SiMe₃)₄ and subsequent methanolysis to give the bridging complexes [(CO)_<i>x</i>M­(μ-PH₂)]₂ (M = Fe, <i>x</i> = 3 (<b>1</b>), M = Cr, <i>x</i> = 4 (<b>2a</b>), M = W, <i>x</i> = 4 (<b>2b</b>)). The photolysis of [(CO)₄M­(μ-PH₂)]₂ (M = Cr (<b>2a</b>), M = W (<b>2b</b>)) with P­(SiMe₃)₃ was applied followed by methanolysis to synthesize the PH₂ bridging transition-metal binuclear complexes with terminal PH₃ groups. The products [(CO)₄M­(μ-PH₂)₂­M­(CO)₃(PH₃)] (M = Cr (<b>3a</b>), M = W (<b>3b</b>)) and [(CO)₄W­(μ-PH₂)₂W­(CO)₂(PH₃)₂] (<b>4b</b>) were isolated in moderate yield. Another synthetic approach to this type of compounds is the direct photolysis of the complexes [(CO)₃M­(PH₃)₃] (M = Cr (<b>5a</b>), M = W (<b>5b</b>)). The products were comprehensively characterized by ³¹P NMR and IR spectroscopy as well as by X-ray structural analysis. Additionally, the relevancy of <b>2a</b> as single source precursor for the synthesis of stoichiometry-controlled CrP nanoparticles has been demonstrated