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... channels for collision-free photochemistry—triple dissociation forming H2⫹2 CO 共28%兲, H2CO⫹CO 共65%兲, and a minor channel 共7%兲 producing CO and an isomer of formaldehyde, possibly hydroxycarbene. ...
... channels for collision-free photochemistry—triple dissociation forming H2⫹2 CO 共28%兲, H2CO⫹CO 共65%兲, and a minor channel 共7%兲 producing CO and an isomer of formaldehyde, possibly hydroxycarbene. ...
Rotational Dynamics of Naphthalene-Labeled Cross
... NTES inside unlabeled networks in the following way. First, we prepared a 10-4 M solution of NTES in 95 vol% methanol/5 vol% THF. We swelled unlabeled networks for 24 hours in this swelling mixture. After this we dried the networks for 48 h in air and for 24 h in vacuum. As a result we obtained netw ...
... NTES inside unlabeled networks in the following way. First, we prepared a 10-4 M solution of NTES in 95 vol% methanol/5 vol% THF. We swelled unlabeled networks for 24 hours in this swelling mixture. After this we dried the networks for 48 h in air and for 24 h in vacuum. As a result we obtained netw ...
Atomic and molecular dynamics triggered by ultrashort light
... Note, the permanent dipole moment is not ω-dependent. The field frequency ω is commonly much lower than any vibronic transition. Therefore, the ω-dependence of the response functions can be dropped and the static limit (ω → 0) can be used [19]. The Taylor expansions in Eq. (2.1a) is particularly pow ...
... Note, the permanent dipole moment is not ω-dependent. The field frequency ω is commonly much lower than any vibronic transition. Therefore, the ω-dependence of the response functions can be dropped and the static limit (ω → 0) can be used [19]. The Taylor expansions in Eq. (2.1a) is particularly pow ...
feature article
... macroscopic systems we usually consider the density of modes per unit volume as a fundamental dynamical quantity whereas in molecules we usually look at the total density of states. It is clear that, for many spectroscopicand dynamical observables, the former quantity is more relevant. When the mole ...
... macroscopic systems we usually consider the density of modes per unit volume as a fundamental dynamical quantity whereas in molecules we usually look at the total density of states. It is clear that, for many spectroscopicand dynamical observables, the former quantity is more relevant. When the mole ...
Halliday 9th chapters 10-11
... ••44Four identical particles of mass 0.50 kg each are placed at the vertices of a 2.0 m × 2.0 m square and held there by four massless rods, which form the sides of the square. What is the rotational inertia of this rigid body about an axis that (a) passes through the midpoints of opposite sides an ...
... ••44Four identical particles of mass 0.50 kg each are placed at the vertices of a 2.0 m × 2.0 m square and held there by four massless rods, which form the sides of the square. What is the rotational inertia of this rigid body about an axis that (a) passes through the midpoints of opposite sides an ...
Fused Glycoluril-Tetrathiafulvalene Molecular Clips as Receptors for
... JH−P = 10.7 Hz) and MALDI-TOF mass spectrometry. The formation of these structures is consistent with the reaction of the thione functionality using trialkylphosphite in diluted conditions.15 The formation of compound 12 was also evidenced by MALDI-TOF mass spectrometry (M+• = 1636), but this origin ...
... JH−P = 10.7 Hz) and MALDI-TOF mass spectrometry. The formation of these structures is consistent with the reaction of the thione functionality using trialkylphosphite in diluted conditions.15 The formation of compound 12 was also evidenced by MALDI-TOF mass spectrometry (M+• = 1636), but this origin ...
Nanoelectrical analysis of single molecules and atomic
... Peter Nirmalraj1*, Damien Thompson2,3, Agustín Molina-Ontoria4, Marilyne Sousa1, Nazario Martín4, Bernd Gotsmann1 and Heike Riel1 Evaluating the built-in functionality of nanomaterials under practical conditions is central for their proposed integration as active components in next-generation electr ...
... Peter Nirmalraj1*, Damien Thompson2,3, Agustín Molina-Ontoria4, Marilyne Sousa1, Nazario Martín4, Bernd Gotsmann1 and Heike Riel1 Evaluating the built-in functionality of nanomaterials under practical conditions is central for their proposed integration as active components in next-generation electr ...
Rotational spectroscopy
Rotational spectroscopy is concerned with the measurement of the energies of transitions between quantized rotational states of molecules in the gas phase. The spectra of polar molecules can be measured in absorption or emission by microwave spectroscopy or by far infrared spectroscopy. The rotational spectra of non-polar molecules cannot be observed by those methods, but can be observed and measured by Raman spectroscopy. Rotational spectroscopy is sometimes referred to as pure rotational spectroscopy to distinguish it from rotational-vibrational spectroscopy where changes in rotational energy occur together with changes in vibrational energy, and also from ro-vibronic spectroscopy (or just vibronic spectroscopy) where rotational, vibrational and electronic energy changes occur simultaneously.For rotational spectroscopy, molecules are classified according to symmetry into spherical top, linear and symmetric top; analytical expressions can be derived for the rotational energy terms of these molecules. Analytical expressions can be derived for the fourth category, asymmetric top, for rotational levels up to J=3, but higher energy levels need to be determined using numerical methods. The rotational energies are derived theoretically by considering the molecules to be rigid rotors and then applying extra terms to account for centrifugal distortion, fine structure, hyperfine structure and Coriolis coupling. Fitting the spectra to the theoretical expressions gives numerical values of the angular moments of inertia from which very precise values of molecular bond lengths and angles can be derived in favorable cases. In the presence of an electrostatic field there is Stark splitting which allows molecular electric dipole moments to be determined.An important application of rotational spectroscopy is in exploration of the chemical composition of the interstellar medium using radio telescopes.