A5061163823- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Synthesis and characterization of novel inorganic/organometallic compounds
- Organometallic Complex Synthesis and Catalysis
- Coordination Chemistry and Organometallics
- Organoboron and organosilicon chemistry
- Catalytic Cross-Coupling Reactions
- Inorganic Chemistry and Materials
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Organic Light-Emitting Diodes Research
- Luminescence Properties of Advanced Materials
- Soil erosion and sediment transport
- Muon and positron interactions and applications
- Thallium and Germanium Studies
- Chemistry and Chemical Engineering
- Hydrology and Sediment Transport Processes
- Nanomaterials and Printing Technologies
- Luminescence and Fluorescent Materials
- Chemical Synthesis and Analysis
- Synthetic Organic Chemistry Methods
- Advanced Sensor and Energy Harvesting Materials
- Particle Dynamics in Fluid Flows
- Inorganic Fluorides and Related Compounds
Shahjalal University of Science and Technology
2014
University of Alberta
2009-2013
National Institute for Nanotechnology
2013
The heavy group 14 methylene analogues, EH2, (E = Ge and Sn) have been stabilized via efficient methods, thus enabling the chemistry of these novel inorganic hydrides to be explored in depth.
A combined donor/acceptor approach is presented for the stabilization of parent germylene, :GeH2.
The N-heterocyclic olefin, IPr=CH(2) (IPr = [(HCNDipp)(2)C], Dipp 2,6-(i)Pr(2)C(6)H(3)) has been demonstrated to be of sufficient Lewis basicity stabilize main group hydrides in unusually low oxidation states.
Various low oxidation state (+2) group 14 element amidohydride adducts, IPr⋅EH(BH(3))NHDipp (E=Si or Ge; IPr=[(HCNDipp)(2)C:], Dipp=2,6-iPr(2)C(6)H(3)), were synthesized. Thermolysis of the reported adducts was investigated as a potential route to Si- and Ge-based clusters; however, unexpected transmetallation chemistry occurred yield carbene-borane adduct, IPr⋅BH(2)NHDipp. When solution IPr⋅BH(2)NHDipp in toluene heated 100 °C, rare C-N bond-activation/ring-expansion reaction involving...
Silver nanowire mesh electrodes represent a possible mass-manufacturable route toward transparent and flexible for plastic-based electronics such as organic photovoltaics (OPVs), light emitting diodes (OLEDs), others. Here we describe that is based upon spray-coated silver meshes on polyethylene terephthalate (PET) sheets are treated with straightforward combination of heat pressure to generate have low sheet resistance, good optical transmission, topologically flat, adhere well the PET...
Putting on some weight: A series of stable adducts featuring the hitherto unknown mixed heavy ethylene analogues H2SiGeH2 and H2SiSnH2 (see picture) were prepared using a versatile donor–acceptor method. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The publisher is responsible for content functionality any supporting information...
A stable Si(II) dihydride complex, IPr·SiH(2)·BH(3) (IPr = [(HCNDipp)(2)C:]; Dipp 2,6-(i)Pr(2)C(6)H(3)), was synthesized and preliminary reactivity involving this source of encapsulated silylene is reported.
To branch or not to branch: A mild stepwise route various linear and branched (GeCl2)x oligogermylenes supported by Lewis bases is reported, including the carbene-bound Ge4 complex NHC⋅GeCl2Ge(GeCl3)2 (see picture). Dipp=2,6-iPr2C6H3, NHC=N-heterocyclic carbene.
The elusive parent inorganic ethylene H2GeGeH2 has been isolated in the form of a stable complex for first time via donor–acceptor coordination with suitable Lewis base/acid combinations (LB·H2Ge-GeH2·LA; LB = N-heterocyclic carbene or olefin; LA W(CO)5). nature bonding these species was investigated by density functional theory calculations and revealed presence polarized Ge–Ge covalent σ-bonds within H2Ge–GeH2 arrays dative Ge–C interactions between digermene carbon-based bases.
A series of monomeric heterocyclic metallylenes [{(i)Pr(2)Si(NR)(2)}M:] (M = Ge and Sn; R Dipp 2,6-(i)Pr(2)C(6)H(3) or SiPh(3)) have been prepared. Preliminary atom-transfer chemistry involving the new low-valent germylenes with chalcogen sources Me(3)NO S(8) yielded corresponding dimeric oxo- sulfido complexes (e.g., [{(i)Pr(2)Si(NDipp)(2)}Ge(μ-E)](2); E O S). Structural analyses their oxidized products reveal that incorporation umbrella-shaped triarylsilyl groups (SiPh(3)) within NSiN...
The iminophosphine–phosphazene [PIII–PV] heterocyclic adduct [IPr·PN(PCl2N)2] was prepared via reduction of the cyclic phosphazene [Cl2PN]3 in presence carbene donor IPr {IPr = [(HCNDipp)2C:], where Dipp 2,6-iPr2C6H3}. By contrast, treatment with N-heterocyclic olefin IPr═CH2 yielded olefin-grafted ring [(IPr═CH)P(Cl)N(PCl2N)2].
The synthesis and coordination chemistry of a series dianionic bis(amido)silyl bis(amido)disilyl, [NSiN] [NSiSiN], chelates with N-bound aryl or sterically modified triarylsilyl (SiAr3) groups is reported. In order to provide consistent comparison the steric coverage afforded by each ligand construct, various two-coordinate N-heterocyclic germylene complexes featuring set were prepared oxidative S-atom transfer was explored. cases where clean oxidation transpired, sulfido-bridged...
Höhere Gewichtsklasse: Eine Reihe stabiler Addukte der bislang unbekannten gemischten Ethylenanaloga H2SiGeH2 und H2SiSnH2 wurde nach einer vielseitigen Donor-Akzeptor-Methode synthetisiert. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by the authors. Please note: The publisher is responsible for content functionality any supporting information supplied...
119Sn Mössbauer spectroscopy was performed on a series of formal Sn(II) dichloride and dihydride adducts bound by either carbon- or phosphorus-based electron pair donors. Upon binding electron-withdrawing metal pentacarbonyl units to the tin centers in LB·SnCl2·M(CO)5 (LB = Lewis base; M Cr W), significant decrease isomer shift (IS) noted relative unbound complexes, LB·SnCl2, consistent with removal nonbonding s-electron density from upon forming Sn-M linkages (M W). Interestingly, when...
The synthesis of a series N-heterocyclic carbene (NHC) complexes involving zinc, cadmium, and the heavy Group 14 elements germanium, tin, lead is reported. direct reaction between bulky IPr (IPr = (HCNDipp)2C:, Dipp 2,6-iPr2C6H3) halide reagents GeCl4 SnCl4 afforded 1 : IPr·ECl4 (E Ge Sn) in high yield; similarly, ZnI2 interacted with THF to give THF-bound complex IPr·ZnI2·THF. CdCl2 underwent divergent chemistry major product isolated was imidazolium salt [IPrH][IPr·CdCl3], which could be...
Lineare und verzweigte Lewis-Base-stabilisierte (GeCl2)x-Oligogermylene sind über eine milde Route stufenweise zugänglich. Eines der Produkte ist durch ein N-heterocyclisches Carben koordinierte Ge4-Komplex NHC⋅GeCl2Ge(GeCl3)2 (siehe Bild; Dipp=2,6-iPr2C6H3). As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited or typeset. Technical support...
Summary An experimental study was conducted to investigate the transport of sand particles over bed deposited in a horizontal conduit by using turbulent flow water. The main objectives were determine near-wall turbulence characteristics at onset erosion (i.e., velocity profile, Reynolds shear stresses, and axial-turbulent intensity); critical required for particle removal from deposits; more specifically, how sand-particle size surface would influence characteristics. A large-scale loop...