A5085388686- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organoboron and organosilicon chemistry
- Organometallic Complex Synthesis and Catalysis
- Synthesis and characterization of novel inorganic/organometallic compounds
- Crystallography and molecular interactions
- Coordination Chemistry and Organometallics
- Catalytic Cross-Coupling Reactions
- Synthetic Organic Chemistry Methods
- Perovskite Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Advancements in Battery Materials
- Thermal Expansion and Ionic Conductivity
- Quantum Dots Synthesis And Properties
- Advanced Battery Materials and Technologies
- Boron Compounds in Chemistry
- Ferroelectric and Piezoelectric Materials
- Solid-state spectroscopy and crystallography
- Synthesis and Properties of Aromatic Compounds
- Advanced Photocatalysis Techniques
- Chemical Synthesis and Characterization
- Organic Light-Emitting Diodes Research
- Inorganic Fluorides and Related Compounds
- High Entropy Alloys Studies
- Magnetic Properties of Alloys
BASF (Germany)
2015-2025
Fraunhofer Institute for Manufacturing Engineering and Automation
2017-2019
Robert Bosch (Germany)
2018-2019
Society for Chemical Engineering and Biotechnology
2016
John Wiley & Sons (Germany)
2016
Durham University
2006-2014
University of Würzburg
2004-2011
High-entropy alloy (HEA) nanoparticles are promising catalyst candidates for the acidic oxygen evolution reaction (OER). Herein, we report synthesis of IrFeCoNiCu-HEA on a carbon paper substrate via microwave-assisted shock method. Under OER conditions in 0.1 M HClO4, HEA exhibit excellent activity with an overpotential ∼302 mV measured at 10 mA cm-2 and improved stability over 12 h operation compared to monometallic Ir counterpart. Importantly, active Ir-rich shell layer nanodomain features...
Because of the toxicity lead, searching for a lead-free halide perovskite semiconducting material with comparable optical and electronic properties is great interest. Rare-earth-based represents promising class materials this purpose. In work, we demonstrate solution-phase synthesis single-crystalline CsEuCl3 nanocrystals uniform size distribution centered around 15 nm. The have photoluminescence emission at 435 nm, full width half-maximum 19 Furthermore, can be embedded in polymer matrix...
Light movements: Irradiation of terminal borylene complexes [(OC)5MBN(SiMe3)2] (M=Cr, Mo) at room temperature in the presence alkynes allows access to various substituted borirenes—an unprecedented transfer main-group-element substrates (see scheme; B red, C white, N blue, Si yellow).
ansa-[2]Borabis(benzene)chromophane and ansa-[2]boraferroarenophane were treated with alkynes in the presence of catalytic amounts platinum or palladium/charcoal (see example) to afford corresponding ansa-bis(boryl)alkenes excellent yields without detectable side products. The use Pt Pd are first examples diboration reactions be conducted under heterogeneous conditions. Supporting information for this article is available on WWW http://www.wiley-vch.de/contents/jc_2002/2006/z603130_s.pdf...
Naked boron: Reaction of the bromoborylene complex [(η5-C5Me5)(OC)Fe(μ-CO)(μ-BBr)Pt(PCy3)Br] with [M(PCy3)2] (M=Pd, Pt) leads to complexes featuring unprecedented coordination one boron atom three transition-metal centers (see picture). According structural and DFT studies, new compounds are best described as metalloborylene stabilized by bases.
Without π stabilization: Phosphine-induced cleavage of a dinuclear precursor yielded the first terminal alkylborylene complex. Experimental and computational data suggest strong MnB interaction, thus compensating lack stabilization provided by B-bound alkyl group accounting for thermal stability title compound its propensity to undergo controlled derivatization. Supporting information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z702029_s.pdf or from...
A range of new iminoborylcomplexes the type [L(n)M-B[triple bond]N-R], which are isoelectronic with sigma-alkynyl complexes [L(n)M-C[triple bond]C-R], was obtained by systematically varying metal M, coligands L, and nitrogen bound substituent R. Selected examples include, for example, trans-[(Cy3P)2(Br)Pt(B[triple bond]N iBu)], is characterized a sterically less demanding N-R group or unprecedented rhodium species cis,mer-[(Br)2(Me3P)3Rh(B[triple bond]NSiMe3)]. All compounds were fully in...
Reaction of [(eta5-C5H4Li)(eta7-C7H6Li)Cr]tmeda with a variety dialkyl(dichloro)silanes in aliphatic solvents afforded the corresponding [1]silatrochrocenophanes. Structural characterization by X-ray diffraction analysis [1]silatrochrocenophanes bearing Me2Si, (iPr)2Si, and silacyclobutane bridges revealed tilt angles alpha 15.56(12) degrees , 15.8(1) 16.33(17) respectively. Analogously, [2]silatrochrocenophane (6) was prepared excellent yield reaction...
Trovacene (1) was prepared by two novel procedures, employing readily available vanadium precursors and after dimetalation converted into the [2]boratrovacenophane 2 [1]boratrovacenophane 4. The reactivity of boron−boron bond in toward [Pt(PEt3)4] studied afforded oxidative addition product 3. X-ray crystallographic studies on 2−4 revealed mutual tiltings carbocyclic rings 11.4, 4.98, 28.23°, respectively.
The photochemically induced transfer of a ferroborylene yielded the first metal-bound borirene (see scheme and product structure, in which methyl substituents are omitted). Experimental theoretical data suggest significant π delocalization three-membered BC2 ring.
From MnB to MnC: The first example of a concerted borylene metathesis through clean cycloaddition–cycloreversion sequence is established, emphasizing the decisive influence boron-bound substituents, and alkyl groups in particular, on reactivity complexes. Cyclic reaction intermediates were characterized by X-ray diffraction analysis. Supporting information for this article available WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z702982_s.pdf or from author. Please note: publisher...
The soft, dynamic lattice of inorganic lead halide perovskite CsPbX3 (X = Cl–, Br–, I–) leads to the emergence many interesting photophysical and optoelectronic phenomena. However, probing their dynamics with vibrational spectroscopy remains challenging. influence fundamental octahedral building block in can be better resolved zero-dimensional (0D) vacancy-ordered double perovskites form A2BX6. Here we study Cs2TeX6 single crystals yield detailed insight into explore effect that its...
Transition metal complexes that feature the ferrocenyl(bromo)boryl ligand, −B(Fc)Br, were prepared utilizing salt-elimination and B−Br bond oxidative addition strategies. The stabilizing interaction causes bending of boron atom toward ferrocenyl iron center in FcBBr2 precursor (1) weakens upon coordination to [(η5-C5R5)(OC)2Fe] trans-[(Cy3P)2PtBr] fragments. efficient π-back-bonding capability latter is reflected absence any Fe−B crystalline trans-[(Cy3P)2Pt(Br){B(Fc)Br}] (7), first platinum...
Heterodinuclear bridged borylene complexes are synthesized via oxidative addition of the B-Br bond bromoboryl complex precursors to an electron-rich palladium species. The synthetic protocol grants access first compound featuring reactive bromoborylene ligand.
Step by step: Stepwise transmetalation of the borylene ligand BN(SiMe3)2 from [(OC)5WBN(SiMe3)2] to [(η5-C5H5)Co(CO)2] gives access first mono- and dinuclear cobalt species provides convincing evidence that intermetal transfer proceeds an associative process with a heterodimetallic intermediate (see structure) without generation free species.
Borylene transfer reactions to [(η5-C5R5)M(CO)2] (M=Rh, R=H; M=Ir, R=Me) using [(OC)5MoBN(SiMe3)2] as a borylene source proceed at room temperature and generate terminal rhodium iridium complexes (see scheme). Iridium complex 1 was characterized by X-ray crystallography.
The first cationic metallaborylene complexes, [{(OC)5Mn}2(μ-B)][BArf4] and [{(η5-C5H4R)(OC)2Fe}2(μ-B)][BArf4] (R=H, Me; see structure) were synthesized by halide abstraction from bridged haloborylene complexes structurally characterized. boron atom is located in the coordination sphere of two transition-metal centers highly unsaturated. Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z800533_s.pdf or author. Please note: publisher...
Vacancy ordered double perovskites Cs2Te(IV)X6 have been found to exhibit molecule-like electronic behavior when X is Cl– or Br– due the zero-dimensional (0D) nature of their octahedral units. Electronically isolated building blocks, [TeBr6]2– ionic octahedron, serve as fundamental unit Cs2TeBr6 solid. Herein, a detailed understanding structure and its photoexcitation presented with consideration individual molecular orbitals from these blocks. Two optical absorption features correspond two...
Switchable selectivity achieved by altering reaction conditions within the same photocatalytic system offers great advantages for sustainable chemical transformations and renewable energy conversion. In this study, we investigate an efficient methanol dehydrogenation with controlled varying concentration of nickel cocatalyst, using zinc indium sulfide nanocrystals as a semiconductor photocatalyst, which enables production either formaldehyde or ethylene glycol high selectivity. Control...
Die photochemische Reaktion der terminalen Borylenkomplexe [(OC)5MBN(SiMe3)2] (M=Cr, Mo) mit Alkinen bei Raumtemperatur eröffnet einen Zugang zu Borirenen – ein erstes Beispiel für den Borylentransfer auf Hauptgruppenelementsubstrate (siehe Schema; B rot, C weiß, N blau, Si gelb).
Transition metal dihaloboryl complexes of the types [(η5-C5R5)Fe(CO)2BX2] (R = H, Me; X F, Cl, Br), [(η5-C5H4Me)Ru(CO)2BX2] (X Cl), and [(OC)5MnBX2] Br) were prepared via salt elimination reactions. Comparison CO stretching frequencies indicates a higher degree Fe−B dπ−pπ back-bonding in dibromoboryl [(η5-C5R5)Fe(CO)2BBr2] with respect to their −BCl2 −BF2 analogues. This finding is constistent pπ−pπ abilities halides (F > Cl Br). Reactions [(η5-C5Me5)Fe(CO)2BX2] 4-methylpyridine performed,...
Die Reaktion des Bromborylenkomplexes [(η5-C5Me5)(OC)Fe(μ-CO)(μ-BBr)Pt(PCy3)Br] mit [M(PCy3)2] (M=Pd, Pt; Cy=Cyclohexyl) führt zu einem neuartigen Koordinationsmodus, bei dem das Boratom von drei Übergangsmetallzentren umgeben ist (siehe Molekülstruktur). Struktur- und DFT-Untersuchungen zufolge kann man diese Verbindungen als Übergangsmetall-Base-stabilisierte Metalloborylenkomplexe beschreiben. Hintergrundinformationen diesem Beitrag sind im WWW unter...
The (dichloroboryl)iron complex [(η5-C5H5)Fe(CO)2BCl2] and its corresponding Lewis base adduct with 4-methylpyridine have been prepared; characterization by single-crystal X-ray diffraction has afforded a structural comparison between the two species.
Differently from typical iminoboranes, the iminoboryl complex trans-[(PCy3)2Pt(B≡NSiMe3)(Br)] (2) displays remarkable stability against oligomerization. Its clean reactivity toward Lewis acids led to synthesis of neutral platinum borylene trans-[(PCy3)2Pt{BN(SiMe3)(AlCl3)}(Br)], through coordination AlCl3 nitrogen atom ligand. Surprising Pt−B linkage in 2 is further manifested its reaction with MeOH, yielding alkoxy(amino)boryl species trans-[(PCy3)2Pt{B(OMe)(N(H)SiMe3)}(Br)].