complexes containing metal carbon and metal metal bonds
Chemistry of cyclopentadienylchromium complexes containing c , n and s organic ligands
Ngày tải lên :
03/10/2015, 20:33
... Cyclopentadienylchromium Complexes containing C-, N- and S- Organic Ligands 14 Chapter 1: Introduction 2,5-dimercapto-1,3,4-thiadiazolate (DMcTH) complexes However, many of its metal complexes reported ... including those of Ru,30 Pt,31 Au32 and Hg,33 and of the main-group metals, Tl34 and Sn.35 It is this versatility and the scarcity of organotransition metal complexes that has prompted an investigation ... Cyclopentadienylchromium Complexes containing C-, N- and S- Organic Ligands 16 Chapter 1: Introduction 2,5-dimercapto-1,3,4-thiadiazolate (DMcTH) complexes These metal complexes are generally...
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Luminescent metal complexes containing naphthalene and anthracene units 1
Ngày tải lên :
16/09/2015, 08:31
... ligand orbital and an empty metal orbital Usually metal complexes which contain electron-rich ligands and/ or high-valent metal center would display low-energy LMCT transition Especially, ligands ... nature of the orbitals involved: (i) metal- to-ligand-chargetransfer (MLCT), (ii) ligand-to -metal- charge-transfer transition (LMCT) and (iii) ligand-toligand-charge-transfer transition (LLCT) ... dinuclear Au(I) complexes containing diphosphine and dithiolate ligand were synthesized Each molecule had two gold atoms bridged by a dithiolate ligand on one side and a diphosphine ligand on the...
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Luminescent metal complexes containing naphthalene and anthracene units 2
Ngày tải lên :
16/09/2015, 08:31
... (3.074(2) Å) and Cu(1)-Cu(4) (3.335(2) Å) This difference in metal metal distance could be due to electronic effects3 as the Cu(3) and Cu(4) ions are bridged by µ2-S(3) and µ2-S(4) and a µ4-S(4) ... shoulds and a low-energy absorption band at 264 nm (ε = 83283 M-1cm-1), 304 nm (ε = 4290 M-1cm-1) and 346 nm (ε=6320 M-1cm-1) The low energy band at 346 nm is likely to originate from ligand-to -metal ... former is assigned to intraligand n(S)→π* transitions from NS2 and the latter is assigned as ligand-to -metal- charge-tranfer compared with other Au(III) thiolate complexes with plane geometry...
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Luminescent metal complexes containing naphthalene and anthracene units 3
Ngày tải lên :
16/09/2015, 08:31
... ligand-ligand σ*(π)→ σ(π*) dσ* σ*(π) 5dz2 dσ π σ*(π) Figure 3.1 Simplified schematic molecular-orbital diagram of platinum(II) complexes of polypyridine ligands with metal- metal and ligand-ligand ... interaction The nature and energy of the excited state in platinum complexes varies with the ligands In the majority of complexes formed by low-valent transition metal atoms and ligands with low lying ... dithiolate and tridentate complexes, the lowest energy excited state has been attributed to either a triplet metal- to-ligand charge transfer state (3MLCT) or a ligand-based state; either a ligand-ligand...
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Luminescent metal complexes containing naphthalene and anthracene units 4
Ngày tải lên :
16/09/2015, 08:31
... b1 orbital and this explains the red-shift of the π→π* transition in the Pt complexes Because of the mixing of the metal and ligand orbitals, the π→π* transition acquires metal- to-ligand-charge-transfer ... respectively; the subscripts std and ref stand for standard sample and reference, respectively Aref and Astd must be obtained under the same instrumental conditions and upon excitation at an isoabsorptive ... MHz) of complexes 4.2·CH2Cl2 and 4.3·CH2Cl2 show only one signal at 40.3 ppm (1JPt,-P = 2968 Hz), and δ 41.0 (1JPt-P = 2926 Hz), respectively The chemical shift of complexes 4.2·CH2Cl2 and 4.3...
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Báo cáo y học: "Research A generalized physiologically-based toxicokinetic modeling system for chemical mixtures containing metal" pdf
Ngày tải lên :
13/08/2014, 16:20
... kidneys between arsenic and cadmium [18], and lead and cadmium [19] have been observed in exposed human populations Toxicological interactions among metals and nonmetals Toxic metals affect the toxicokinetics ... aromatic hydrocarbons (PAHs), and volatile organic compounds (VOCs) Indeed, these toxic metals can accumulate in the liver and kidneys and, due to their long half-lives, affect the hepatic and renal ... gastrointestinal absorption pathway [12], and metallothionein plays an important role in overall absorption, distribution, elimination and toxicity [21] Metabolism of metal and metalloid compounds is limited...
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Activation of c h and c f bonds by cyclopentadienyl iridium complexes
Ngày tải lên :
13/09/2015, 19:48
... advice and help; my co-supervisors, A/P Marc Garland and Dr Zhu Yinghuai (Institute of Chemical and Engineering Sciences, A*STAR) for their support and my boss, Andy Naughton for his kind understanding ... 1.2.2 Activation of C-Cl and C-F bonds 1.2.3 Activation of C-C bonds 1.2.4 Activation of C-H bonds 1.3 C-H bond activation by transition metal complexes 1.3.1 Intramolecular and intermolecular C-H ... In Activation and Catalytic Reactions of Saturated Hydrocarbons in the Presence of Metal Complexes; Catalysis by Metal Complexes Volume 21; Kluwer Academic Publishers: The Netherlands, 2000; Chapter...
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Tài liệu Female chacma baboons form strong, equitable, and enduring social bonds pptx
Ngày tải lên :
15/02/2014, 13:20
... May and October), leaving elevated islands edged with woodland Baboons feed extensively on a number of tree species in these edged woodlands During floods, baboons ford the submerged plains and ... difference, and rank distance For maternal kinship, we used the average degree of relatedness for kin categories (mothers and daughters, r=0.5, maternal sisters: r=0.25, grandmother and granddaughters, ... close, equitable, supportive, and enduring social relationships and show strong and stable preferences for close kin and for unrelated females who are close in age and rank These findings confirm...
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Báo cáo khoa học: The essential tyrosine-containing loop conformation and the role of the C-terminal multi-helix region in eukaryotic phenylalanine ammonia-lyases docx
Ngày tải lên :
07/03/2014, 12:20
... A), 266–295 (chain B) and 385–399 (chain C) in SmPALout ⁄ in and 33–128 and 333–351 (chain A), 272–303 (chain B) and 293–306 (chain C) in PlPALout ⁄ in The preoptimizations and molecular dynamics ... (1W27) and modified (1W27mod) structures The Ramachandran plot analysis (ignoring Pro and Gly) was performed on single subunits (chain A, 716 amino acid) of the experimental parsley PAL (1W27) and ... related to PAL2, and PAL3 always clusters together with PAL4 [61] In A thaliana, from the molecular phenotype, common and specific functions of PAL1 and PAL2 were delineated, and PAL1 was qualified...
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The Carbon and Global Warming Potential Impacts of Organic Farming: Does It Have a Significant Role in an Energy Constrained World? pptx
Ngày tải lên :
08/03/2014, 23:20
... representing organic and conventional farms located in alpine, upland and lowland regions Notably, and rather innovatively, the authors included an estimate for GHG impacts of the estimated land use change ... approach and compared one organic and one conventional arable farm on clay soil (both growing potato, sugar beet, wheat, carrot, onion and pea) and one organic and conventional vegetable farm on sandy ... same total yield, it conserves soil, water, above and belowground biodiversity, and even maintains and restores multifunctional landscapes [7-9] and these key environmental benefits cannot be overlooked...
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NYSE Listed and NYSE Traded Bonds pptx
Ngày tải lên :
15/03/2014, 07:20
... Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate ... Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate ... Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Corporate Bonds Traded...
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Báo cáo khoa học: Thermosynechoccus elongatus DpsA binds Zn(II) at a unique three histidine-containing ferroxidase center and utilizes O2 as iron oxidant with very high efficiency, unlike the typical Dps proteins ppt
Ngày tải lên :
15/03/2014, 09:20
... 30 and 48 A2 in the A-site and the B-site, respectively, and thus points to tighter binding of the metal to the former site Accordingly, the distances between Zn(II) and the pro˚ tein ligands ... Zn(II) and the formation of Zn–Fe complexes, as indicated by the ICP-AES and optical absorbance data Thus, upon addition of oxygen or H2O2, absorption bands at 320 and 370 nm appear, and persist ... (Cys30 and Cys69, respectively) and in the BCloop (Cys102, Cys103, and Cys114) The X-ray crystal structure clearly shows that Cys30, Cys69 and Cys114 are completely buried in the monomer, and that...
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Báo cáo khoa học: Characterization of D-amino-acid-containing excitatory conotoxins and redefinition of the I-conotoxin superfamily pot
Ngày tải lên :
16/03/2014, 22:20
... sequences of conotoxins r11b and r11c have d-Phe and d-Leu at positions 44 and 42, respectively Henceforth, we will refer to the d version of the peptides simply as r11b and r11c, and the all-l versions ... trace in each panel) and during (remaining traces) exposure to 100 nM of [L-Leu42]r11c (panels A1 and A2) or r11c (B1 and B2) In each panel, the gap between the lowest trace and the one immediately ... refer to these as the I1 superfamily (Group A and B in Table 3, including r11a, r11b and r11c) and the I2 superfamily (Group C in Table 3, including ViTx and BtX) A noteworthy feature of the I2 superfamily...
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Modelling and Pricing Hybrid bonds: Julien TURC Head of Quantitative Research, Société Générale CIB ppt
Ngày tải lên :
22/03/2014, 18:20
... dividends or share buy backs Mandatory deferral Usually based on an earnings-related trigger or a solvency ratio (for financial companies) Maturity, and Extension Hybrid bonds are usually long dated, ... of the model Technical details on the model Credit Research Common features of hybrid bonds Subordination, and Coupon deferral Subordination of capital Hybrid securities are subordinated to Senior ... securities Pricing hybrid bonds The multiple method SG’s quantitative approach Relative value analysis Appendices Characteristics of existing issues Sensitivity analysis and stress-testing of the...
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Báo cáo khoa học: Polysaccharide binding sites in hyaluronate lyase – crystal structures of native phage–encoded hyaluronate lyase and its complexes with ascorbic acid and lactose docx
Ngày tải lên :
23/03/2014, 04:21
... ligand The crystals of the native protein were soaked in solutions containing ascorbic acid and lactose separately for 48 h and the crystal structures of the two complexes were determined and ... structure (cyan) and that of complexed structure with ascorbic acid (yellow) at subsites (A), (B) and (C), respectively The dotted lines indicate hydrogen bonds between protein and ligand atoms FEBS ... regions and associated structural changes upon ligand binding have not been characterized so far To understand the structure and function relationship of unusually structured triple-stranded hyaluronate...
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Báo cáo khoa học: Physical properties and surface activity of surfactant-like membranes containing the cationic and hydrophobic peptide KL4 potx
Ngày tải lên :
30/03/2014, 11:20
... 1-palmitoyl-2-oleoyl-phosphatidylglycerol and ⁄ or PA [15], which may decrease the miscibility between these lipids and DPPC A high level of miscibility between DPPC and POPG in bilayers or monolayers has been reported [15,25] and ... absence (s) and presence of 0.28 mol% (d), 0.57 mol% (d), 1.2 mol% (d), 1.8 mol% (m), and 2.1 mol% (n) KL4 in a final volume of mL of mM Hepes buffer, pH 7.0, containing 150 mM NaCl and 1.8 mM ... vesicles, with and without KL4, was that these membranes exhibited similar lipid lateral organization with co-existing fluid and solid phases, both in the absence and presence of calcium (Figs and 5)...
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Báo cáo hóa học: " ZnO Nanorods via Spray Deposition of Solutions Containing Zinc Chloride and Thiocarbamide" potx
Ngày tải lên :
22/06/2014, 18:20
... the left column (a, c, e); and from tu containing solution at ZnCl2:tu = 1:0.25 in the right column (b, d, f) using deposition times of (a and b); (c and d); 15 (e and f) [Zn2+] = 0.1 mol/L was ... solutions without and with thiourea addition at molar ratio of Zn:tu = 1:0.25 are presented in Fig ZnO rods deposited from ZnCl2 solution exhibits dominating strong and sharp and near band edge (NBE) ... emission band is absent in the spectrum of this sample PL spectrum of the samples prepared from the solutions containing thiocarbamide shows decreased intensity of the UV-emission band and appearance...
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Integrated Assessment of Black Carbon and Tropospheric Ozone docx
Ngày tải lên :
28/06/2014, 19:20
... atmosphere and by reducing albedo, the ability to reflect sunlight, when deposited on snow and ice Carbon The uptake and storage of carbon Trees and plants, for example, absorb sequestration carbon ... and ice, wind patterns, and clouds are all affected, and these in turn have an impact on human well-being by influencing factors such as water availability, agriculture and land use Both O3 and ... of Black Carbon and Tropospheric Ozone Asia and Pacific are projected to increase, resulting in additional crop yield losses (Figures and 8) In South, West and Central Asia, both health and agricultural...
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Báo cáo lâm nghiệp: "Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China" pptx
Ngày tải lên :
07/08/2014, 10:21
... influence of elevation and associated vegetation type and the effect of moistureelevation interaction on C0 and C0k indicated that the environmental effect on C0 and C0k was complex and deserves further ... (2001): Consistent land and atmosphere based U.S carbon sink estimates Science, 292: 2316–2320 Raich J.W., Schlesinger W.H (1992): The global carbon dioxide flux in soil respiration and its relationship ... problem, and strategy Biodiversity and Conservation, 12: 883–903 Zhang X.H., Li L.Q., Pan G.X (2007): Topsoil organic carbon mineralization and CO2 evolution of three paddy soils from South China and...
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Báo cáo vật lý: "Decolourisation of Reactive Orange 16 by Activated Carbon and Copper Oxide Catalysts Supported by Activated Carbon" ppsx
Ngày tải lên :
07/08/2014, 14:20
... Surface and catalytic properties of copper oxide supported on Al2O3 and active carbon Mater Lett., 17(5), 297–302 Wang, S & Lu, M G Q (1997) Effects of oxide promoters on metal dispersion and metal- support ... Cu-AC/H2O2 and Cu-AC/H2O2/UV Similar trends were observed for Cu-AC and Cu-AC/UV and for Cu-AC/H2O2 and Cu-AC/H2O2/UV, as depicted in Figure A steady decline in the intensity of the 387 nm and 492 ... 2.1 31 Activated Carbon Modification Commercial AC (KI7060, Kekwa Indah Sdn Bhd., Malaysia) was crushed and sieved The carbon with a diameter between 300 and 500 μm was collected and soaked in HCl...
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