排序方式: 共有42条查询结果,搜索用时 124 毫秒
11.
Daniele de Sanctis Antonia Beteva Hugo Caserotto Fabien Dobias José Gabadinho Thierry Giraud Alexandre Gobbo Matias Guijarro Mario Lentini Bernard Lavault Trevor Mairs Seán McSweeney Sébastien Petitdemange Vicente Rey‐Bakaikoa John Surr Pascal Theveneau Gordon A. Leonard Christoph Mueller‐Dieckmann 《Journal of synchrotron radiation》2012,19(3):455-461
ID29 is an ESRF undulator beamline with a routinely accessible energy range of between 20.0 keV and 6.0 keV (λ = 0.62 Å to 2.07 Å) dedicated to the use of anomalous dispersion techniques in macromolecular crystallography. Since the beamline was first commissioned in 2001, ID29 has, in order to provide an improved service to both its academic and proprietary users, been the subject of almost continuous upgrade and refurbishment. It is now also the home to the ESRF Cryobench facility, ID29S. Here, the current status of the beamline is described and plans for its future are briefly outlined. 相似文献
12.
13.
De Cat I Gobbo C Van Averbeke B Lazzaroni R De Feyter S van Esch J 《Journal of the American Chemical Society》2011,133(51):20942-20950
With the aim of controlling the position of functional groups in a substrate-supported monolayer, a new family of functionalized linear alkyl chains was designed and synthesized, aided by molecular mechanics and dynamics simulations of its two-dimensional self-assembly on graphite. The self-assembly of these amino functionalized diamides at the liquid/solid interface was investigated with scanning tunneling microscopy. Intermolecular hydrogen-bonding interactions involving amides, combined with the effect of molecular symmetry and chirality, were found to guide the self-assembly. Control of the relative position and orientation of the amine groups was achieved, in the case of enantiopure compounds. Interestingly, racemates led to both racemic conglomerate and solid solution formation, with a concomitant loss of positional and orientational control of the amino groups as a result. 相似文献
14.
G. Del Gobbo F. Giammanco F. Maccarrone P. Marsili F. Strumia 《Il Nuovo Cimento D》1996,18(7):791-798
Summary The influence of a static magnetic field orthogonal to the axis of an argon laser discharge is investigated. The enhancement
of the small-signal gain at 488 nm is measured as a function of the magnetic field at different values of the parameters of
the discharge. The data about the gain compared with the measurement of the fluorescence from the upper level of the 488 nm
line give information about the excitation mechanisms. A strong enhancement of the ionization rate of Ar+ is detected. 相似文献
15.
The low-lying XSigma+, a3Delta, A1Delta, b3Sigma+, B1Pi, c3Pi, C1Phi, D1Sigma+, E1Pi, d3Phi, and e3Pi electronic states of RhB have been investigated at the ab initio level, using the multistate multiconfigurational second-order perturbation (MS-CASPT2) theory, with extended atomic basis sets and inclusion of scalar relativistic effects. Among the eleven electronic states included in this work, only three (the X1Sigma+, D1Sigma+, and E1Pi states) have been investigated experimentally. Potential energy curves, spectroscopic constants, dipole moments, binding energies, and chemical bonding aspects are presented for all electronic states. 相似文献
16.
Dr. Alberto Gobbo Dr. Xinyuan Ma Prof. Gianluca Ciancaleoni Prof. Stefano Zacchini Dr. Lorenzo Biancalana Dr. Massimo Guelfi Prof. Guido Pampaloni Prof. Steven P. Nolan Prof. Fabio Marchetti 《欧洲无机化学杂志》2023,26(18):e202300078
While ruthenium(II) arene complexes have been widely investigated for their potential in catalytic transfer hydrogenation, studies on homologous compounds replacing the arene ligand with the six-electron donor tris(1-pyrazolyl)methane (tpm) are almost absent in the literature. The reactions of [RuCl(κ3-tpm)(PPh3)2]Cl, 1 , with a series of nitrogen ligands (L) proceeded with selective PPh3 mono-substitution, affording the novel complexes [RuCl(κ3-tpm)(PPh3)(L)]Cl (L=NCMe, 2 ; NCPh, 3 ; imidazole, 4 ) in almost quantitative yields. Products 2 – 4 were fully characterized by IR and multinuclear NMR spectroscopy, moreover the molecular structure of 4 was ascertained by single crystal X-ray diffraction. Compounds 2 – 4 were evaluated as catalytic precursors in the transfer hydrogenation of a series of ketones with isopropanol as the hydrogen source, and 2 exhibited the highest activity. Extensive NMR experiments and DFT calculations allowed to elucidate the mechanism of the transfer hydrogenation process, suggesting the crucial role played by the tpm ligand, reversibly switching from tri- to bidentate coordination during the catalytic cycle. 相似文献
17.
Marcolongo G Ruaro G Gobbo M Meneghetti M 《Chemical communications (Cambridge, England)》2007,(46):4925-4927
Double-wall carbon nanotubes (DWNT) have been functionalized with lysine after a strong oxidation with MnO4- in acid solution which, as suggested by the Raman spectra, attacked the external nanotube of the DWNT. 相似文献
18.
19.
Jérémy Barbé Jessica Eid Erik Ahlswede Stefanie Spiering Michael Powalla Rakesh Agrawal Silvano Del Gobbo 《Journal of nanoparticle research》2016,18(12):379
Cu(In,Ga)Se2 (CIGSe) thin film solar cells were fabricated by direct inkjet printing of Cu(In,Ga)S2 (CIGS) nanoparticles followed by rapid thermal annealing under selenium vapor. Inkjet printing is a low-cost, low-waste, and flexible patterning method which can be used for deposition of solution-based or nanoparticle-based CIGS films with high throughput. XRD and Raman spectra indicate that no secondary phase is formed in the as-deposited CIGS film since quaternary chalcopyrite nanoparticles are used as the base solution for printing. Besides, CIGSe films with various Cu/(In + Ga) ratios could be obtained by finely tuning the composition of CIGS nanoparticles contained in the ink, which was found to strongly influence the devices performance and film morphology. To date, this is the first successful fabrication of a solar device by inkjet printing of CIGS nanoparticles. 相似文献
20.
Dr. Aina Rebasa-Vallverdu Dr. Stefano Valente Dr. Agostino Galanti Maria Sbacchi Francesco Vicentini Laura Morbiato Beatrice Rosetti Prof. Pierangelo Gobbo 《European journal of organic chemistry》2023,26(40):e202300529
The bottom-up fabrication of synthetic cells (protocells) from molecules and materials, is a major challenge of modern chemistry. A significant breakthrough has been the engineering of protocells capable of chemical communication using bio-derived molecules and ex situ stabilised cell machineries. These, however, suffer from short shelf-lives, high costs, and require mild aqueous conditions. In this Concept Article we analyse the chemistry at the heart of protocell communication to highlight new opportunities for synthetic chemists in protocell engineering. Specifically, we (i) categorise the main bio-derived chemical communication machineries in enzyme cascades, DNA strand displacement, and gene-mediated communication; (ii) review the chemistries of these signal transduction machineries; and (iii) introduce new types of bio-inspired, fully synthetic artificial enzymes to replace their natural counterparts. Developing protocells that incorporate synthetic analogues of bio-derived signal transduction machineries will improve the robustness, stability, and versatility of protocells, and broaden their applications to highly strategic fields such as photocatalysis and fine chemicals production. 相似文献