Fused Glycoluril-Tetrathiafulvalene Molecular Clips as Receptors for
... the 1H NMR spectrum was noted upon addition of m-DNB into a solution of molecular clip 3 in CDCl3, the host−guest affinity was detected by UV−vis spectroscopy by monitoring the changes at 800 nm upon titration of clip 3 with the addition of m-DNB aliquots (Figure 4). A saturation was observed after th ...
... the 1H NMR spectrum was noted upon addition of m-DNB into a solution of molecular clip 3 in CDCl3, the host−guest affinity was detected by UV−vis spectroscopy by monitoring the changes at 800 nm upon titration of clip 3 with the addition of m-DNB aliquots (Figure 4). A saturation was observed after th ...
Ions in crystals: The topology of the electron density in ionic
... the halide perovskites AM X 3 . Our analysis lies within the framework of the atoms in molecules ~AIM! theory developed by Bader and co-workers.1,2 AIM theory provides a rigorous quantum-mechanical foundation to key concepts of the chemical structure, such as which bonds do exist, how the shape of a ...
... the halide perovskites AM X 3 . Our analysis lies within the framework of the atoms in molecules ~AIM! theory developed by Bader and co-workers.1,2 AIM theory provides a rigorous quantum-mechanical foundation to key concepts of the chemical structure, such as which bonds do exist, how the shape of a ...
Glossary of Commonly Used Ion Implantation
... resultant energy being something on the order of ½, ¼ of the extraction with useable beam currents. In recent years, this has lost some level of popularity since some % of the ions at the initial energy can stay at the same momentum as they were at the original energy and become “energy contaminants ...
... resultant energy being something on the order of ½, ¼ of the extraction with useable beam currents. In recent years, this has lost some level of popularity since some % of the ions at the initial energy can stay at the same momentum as they were at the original energy and become “energy contaminants ...
The keV–TeV connection in gamma-ray binaries
... The gamma-ray emission from astrophysical sources is arguably different from the emission in the rest of the electromagnetic spectrum because it cannot be generated by hot matter. High energy gamma radiation is therefore an indication that non-thermal processes, which are able to concentrate a large ...
... The gamma-ray emission from astrophysical sources is arguably different from the emission in the rest of the electromagnetic spectrum because it cannot be generated by hot matter. High energy gamma radiation is therefore an indication that non-thermal processes, which are able to concentrate a large ...
Cooperative Guest Inclusion by a Zeolite Analogue Coordination
... takes place (Supporting Information).22 The dynamic structure exhibited by 1 is typical behavior of a third-generation porous solid following the Kitagawa classification.3c The affinity of 1 for group 1 metal salts does not follow the expected ionic radii trend but Li+ > K+ > Rb+ > Na+ . Cs+. We thi ...
... takes place (Supporting Information).22 The dynamic structure exhibited by 1 is typical behavior of a third-generation porous solid following the Kitagawa classification.3c The affinity of 1 for group 1 metal salts does not follow the expected ionic radii trend but Li+ > K+ > Rb+ > Na+ . Cs+. We thi ...
Crystallization of charge holes in the spin ladder of Sr14Cu24O41
... Bragg reflections that index roughly as L c ¼ 2n ^ 0.2 (refs 11, 12). This phenomenon is unlikely to account for the observed CDW transport properties, however, since transport in this system is determined by the ladders23. Moreover, in terms of the true unit cell these reflections index as L ¼ 20n ...
... Bragg reflections that index roughly as L c ¼ 2n ^ 0.2 (refs 11, 12). This phenomenon is unlikely to account for the observed CDW transport properties, however, since transport in this system is determined by the ladders23. Moreover, in terms of the true unit cell these reflections index as L ¼ 20n ...
Vezentsev_Modified_layered_11 (1)
... Önal M., Sarikaya Y. and Alemdaroğlu T. (2006), The Effect of Acid Activation of Some Physicochemical Properties of a Bentonite, Turk J Chem., 26 , 409 – 416. Grzegorz J. and Grzegorz B. (2002), Effect of Acid and Alkali Treatments on Surface Areas and Adsorption Energies of Selected Minerals, Clays ...
... Önal M., Sarikaya Y. and Alemdaroğlu T. (2006), The Effect of Acid Activation of Some Physicochemical Properties of a Bentonite, Turk J Chem., 26 , 409 – 416. Grzegorz J. and Grzegorz B. (2002), Effect of Acid and Alkali Treatments on Surface Areas and Adsorption Energies of Selected Minerals, Clays ...
Laplacian-level density functionals for the kinetic energy density and
... in Eq. (22)) in the high-correlation case. The region near the nucleus of the pseudo-Hooke’s atom is unusual because there strong correlation creates a deep “hole” in the density: q decreases smoothly with increasing r (from 19.29 at r = 0 to ≈ 0 at r = 0.68), and p increases slowly with increasing ...
... in Eq. (22)) in the high-correlation case. The region near the nucleus of the pseudo-Hooke’s atom is unusual because there strong correlation creates a deep “hole” in the density: q decreases smoothly with increasing r (from 19.29 at r = 0 to ≈ 0 at r = 0.68), and p increases slowly with increasing ...
Article PDF - IOPscience
... detailed mass-transfer models, however, we show that the binary parameters of M82 X-2 are not surprising provided non-conservative mass transfer is allowed. Specifically, the donor-mass lower limit and orbital period measured for M82 X-2 lie near the most probable values predicted by population synth ...
... detailed mass-transfer models, however, we show that the binary parameters of M82 X-2 are not surprising provided non-conservative mass transfer is allowed. Specifically, the donor-mass lower limit and orbital period measured for M82 X-2 lie near the most probable values predicted by population synth ...
255
... HCN fragments are vibrationally excited. It is now generally recognized that, similar to glyoxal (for leading references, see ref. 12), the photoexcitation of s-tetrazine from S0 to S1 state is followed by a rapid internal conversion to the highly vibrationally excited manifold of the ground state p ...
... HCN fragments are vibrationally excited. It is now generally recognized that, similar to glyoxal (for leading references, see ref. 12), the photoexcitation of s-tetrazine from S0 to S1 state is followed by a rapid internal conversion to the highly vibrationally excited manifold of the ground state p ...
Chemical bonding and structure
... number of electrons in the outer shell of the atoms of all the elements in that group. We also learned that Group 18 elements, known as the noble gases, where the atoms all have full outer shells of electrons, are especially stable and have almost no tendency to react at all. This full outer shell b ...
... number of electrons in the outer shell of the atoms of all the elements in that group. We also learned that Group 18 elements, known as the noble gases, where the atoms all have full outer shells of electrons, are especially stable and have almost no tendency to react at all. This full outer shell b ...
Diaza-18-crown-6 Appended Dual 7-hydroxyquinolines
... crystal (- • -), HgCl2 (Gray), and Hg2Cl2 (black). ...
... crystal (- • -), HgCl2 (Gray), and Hg2Cl2 (black). ...
Tracking Chemical Reactions with Ultrafast X
... the spin state of the intermediate complex. Combining these finding we interpret that the aquation process happens from a non-singlet potential energy surface and takes about 13 ps. Also, we characterised the molecular structure of photoexcited [FeII (terpy)2 ]2+ molecule via TR EXAFS. The data anal ...
... the spin state of the intermediate complex. Combining these finding we interpret that the aquation process happens from a non-singlet potential energy surface and takes about 13 ps. Also, we characterised the molecular structure of photoexcited [FeII (terpy)2 ]2+ molecule via TR EXAFS. The data anal ...
SED122 - National Open University of Nigeria
... Matter is electrical in nature. Evidences for this assertion came from results of experiments of early scientists like Faraday, Thompson and Millikan. The negatively charged particle in matter is the electron, It has negligible mass. The proton is the positively charged particle. It carries the same ...
... Matter is electrical in nature. Evidences for this assertion came from results of experiments of early scientists like Faraday, Thompson and Millikan. The negatively charged particle in matter is the electron, It has negligible mass. The proton is the positively charged particle. It carries the same ...
covalent - Typepad
... b. attracts ions with negative charges. c. results when an alkaline-earth metal loses one of its two outermost electrons. d. has more protons than electrons. 4. The elements of the ____ group satisfy the octet rule without forming compounds. a. main c. alkali metal b. noble gas d. alkaline-earth met ...
... b. attracts ions with negative charges. c. results when an alkaline-earth metal loses one of its two outermost electrons. d. has more protons than electrons. 4. The elements of the ____ group satisfy the octet rule without forming compounds. a. main c. alkali metal b. noble gas d. alkaline-earth met ...
17 The Atomic Nature of Matter
... In about six years, one of your exhaled breaths becomes evenly mixed in the atmosphere. At that point, every person in the world inhales an average of one of your exhaled atoms in a single breath. And this occurs for each breath you exhale! ...
... In about six years, one of your exhaled breaths becomes evenly mixed in the atmosphere. At that point, every person in the world inhales an average of one of your exhaled atoms in a single breath. And this occurs for each breath you exhale! ...
Hydrogen storage of calcium atoms adsorbed on graphene: First
... to Ca, H atom farther from Ca and graphene are calculated for 8H2 +2Ca+Graphene system corresponding to H1+H2 configuration in Fig.3 to be ∼ +1.29, ∼ −0.06, ∼ −0.11 and ∼ −1.23 electrons. One hydrogen atom of tilted H2 , which is closer to Ca has more excess charge than the other one. It is importan ...
... to Ca, H atom farther from Ca and graphene are calculated for 8H2 +2Ca+Graphene system corresponding to H1+H2 configuration in Fig.3 to be ∼ +1.29, ∼ −0.06, ∼ −0.11 and ∼ −1.23 electrons. One hydrogen atom of tilted H2 , which is closer to Ca has more excess charge than the other one. It is importan ...
Metastable inner-shell molecular state
Metastable Innershell Molecular State (MIMS) is a class of ultra-high-energy short-lived molecules have the binding energy up to 1,000 times larger and bond length up to 100 times smaller than typical molecules. MIMS is formed by inner-shell electrons that are normally resistant to molecular formation. However, in stellar conditions, the inner-shell electrons become reactive to form molecular structures (MIMS) from combinations of all elements in the periodic table. MIMS upon dissociation can emit x-ray photons with energies up to 100 keV at extremely high conversion efficiencies from compression energy to photon energy. MIMS is predicted to exist and dominate radiation processes in extreme astrophysical environments, such as large planet cores, star interiors, and black hole and neutron star surroundings. There, MIMS is predicted to enable highly energy-efficient transformation of the stellar compression energy into the radiation energy.The right schematic illustration shows the proposed four stages of the K-shell MIMS (K-MIMS) formation and x-ray generation process. Stage I: Individual atoms are subjected to the stellar compression and ready for absorbing the compression energy. Stage II: The outer electron shells fuse together under increasing ""stellar"" pressure. Stage III: At the peak pressure, via pressure ionization K-shell orbits form the K-MIMS, which is vibrationally hot and encapsulated by a Rydberg-like pseudo-L-Shell structure. Stage IV: The K-MIMS cools down by ionizing (""boiling-off"") a number of pseudo-L-shell electrons and subsequent optical decay by emitting an x-ray photon. The dissociated atoms return their original atoms states and are ready for absorbing the compression energy.MIMS also can be readily produced in laboratory and industrial environments, such as hypervelocity particle impact, laser fusion and z-machine. MIMS can be exploited for highly energy-efficient production of high intensity x-ray beams for a wide range of innovative applications, such as photolithography, x-ray lasers, and inertial fusion.