Showing papers in "Chemical Physics Letters in 1976"

TL;DR: In this paper, the quadrupolar spin echo from deuterons in ordered hydrocarbon systems is shown to provide a much more reliable spectrum than the conventional free induction decay Fourier transform.

TL;DR: In this paper, the exponential repulsion of bilayers in lecithin-water dispersions is explained as arising from modification of water structure near the leCithin water interface.

TL;DR: In this article, the relationship between vibrational population relaxation, loss of phase coherence, and the homogeneously broadened spontaneous polarized Raman linewidth is discussed, and a general equation relating there quantities is derived.

TL;DR: In this paper, a concept of conjugated circuits contained in Kekule forms of benzenoid hydrocarbons is considered and the calculated resonance energies are on average within 0.05 eV of the values obtained by SCF MO calculations.

TL;DR: In this paper, the angular-dependent XPS was used to study the attenuation of silicon with thermally-grown oxide overlayers in the thickness range 15-89 A and found attenuation lengths at 1382 eV in SiO2 and 27 plus or minus 6 A in Si.

TL;DR: Using sub-picosecond pulses from a mode-locked cw dye laser, this paper studied ultrafast absorption recovery in the triphenylmethane dye malachite green after excitation to the first singlet.

TL;DR: In this article, relativistic and non-relativistic Hartree-Fock one-centre expansion calculations including valence s and p orbitals are reported for CuH, AgH and AuH molecules.

TL;DR: In this article, the inversional barrier increases and the torsional barrier decreases on fluorine substitution on aniline and 4-fluoroaniline spectra.

TL;DR: In this paper, the second order hyperpolarizability β has been measured for ortho-, meta-and para-nitroanaline, and anomalously large nonlinearities which can be quantitatively understood as due to the strong donor-acceptor charge transfer interaction.

TL;DR: In this paper, the formation and decay rate constants of the DODCI photoisomer were found to follow an Arrhenius law with respectively an activation energy of 4.5 ± 0.4 kcal/M and 14.3 kcal/m.

TL;DR: In this article, three methods for separating rotational and level kinetics are described theoretically, and one of them is performed experimentally using a repetitive picosecond spectrometer for the measurement of rotational behaviour of fluorescein 27 in solvents of different viscosity.

TL;DR: The character of rate constants for a dissociation occurring near threshold on an attractive potential-energy surface is discussed in this article, where application is made to the attachment of electrons to SF6 and CCl4, and to the autoionization of SF6-.

TL;DR: In this article, high resolution NMR of rare spins in solids has been used for selective measurement through transverse relaxation of the shapes of lines corresponding to nonequivalent 13 C nuclei in solid norbornadiende between 195 and 225 K.

TL;DR: In this article, the rotational constants of a-type and b-type transitions have been observed and the half lifetime of the molecule has been found to be about 30 minutes when the sample is stored in a Pyrex flask.

TL;DR: In this paper, the vibrational energy relaxation rates of the liquid nitrogen ∆ CO system were measured by optically pumping the collision-induced fundamental vibrational absorption band of liquid N2 with the output of an HBr TEA laser.

TL;DR: In this paper, a truncated anharmonic oscillator driven by a pulsed, intense laser field is considered for multiphoton photofragmentation of an isolated molecule on the lowest potential surface.

TL;DR: In this article, the Kato electron-electron cusp condition is used to derive a corresponding cus condition for the spherical average of the intracule matrix, and the numerical utility of this condition is illustrated by considering the Hart and Herzberg 20-parameter Hylleraas-type wave functions for the helium-like ions.

TL;DR: In this article, the NO molecule was excited with a tunable pulsed dye laser by two-photon absorption into 0, 1, 2 levels of the A 2 Σ + state at bandwidths down to Doppler width.

TL;DR: In this paper, a new method has been developed to detect molecular ion emissions and to measure their quantum yields and lifetimes and the quantum yields are found for N + 2 (B), N 2 O + (A), C 6 F + 6 (A ) and C 6F 5 H + (B ).

TL;DR: In this article, the ESCA inner shell spectra of Cu compounds were investigated theoretically and it was shown that the large satellites appearing for Cu(II) compounds correspond to shake-up states which are close to the configuration p5d9 and have the characteristic multiplet splitting of this configuration.

TL;DR: In this paper, an analysis of the intensity dependence of the experimental multiphoton photodissociation probability ((Γ)) for a conical geometry of the laser beam, incorporating saturation effects is presented.

TL;DR: In this paper, a number of electronically excited states of molecular oxygen whose potential curves are obtained by large-scale configuration interaction calculation are calculated for the first eleven vibrational levels corresponding to the discrete portion of the Schumann runge band systems.

TL;DR: In this article, a method for the evaluation of one-electron expectation values from Xα multiple-scattering wavefunctions is presented for the hyperfine interaction parameters of NO 2 yields good agreement with experiment.

TL;DR: In this article, the effect of external magnetic field on photolysis of dibenzoyl peroxide in toluene was measured at 20°C in the presence of a field of 0.3 T.

TL;DR: A simple theory of the homogeneous broadening of vibrational lines in the IR and Raman spectra of molecules in liquids is presented in this article, which considers the relationship between the linewidth and excited state lifetime, parameters which may now be independently measured.

TL;DR: The difference in chemical shift between hydrogen bonded protons and deuterons has been examined both theoretically and experimentally as discussed by the authors, and valuable information about the hydrogen bond potential can be extracted from this isotope effect on chemical shifts.

TL;DR: The detailed structure of the 3D photoelectron signals of cerium(III), praseodymium (III), and neodynium( III) is mainly due to J-level distribution in intermediate coupling of 3d 9 4f q ( q = 1, 2, 3), superposed on satellites (due to electron transfer) as known from lanthanum(III) compounds.

TL;DR: In this article, the mechanism of efficient intersystem crossing of anthrone has been discussed and compared with that of benzophenene, and the rise time of fluorenone has been found to be sensitive to solvent, changing from 140 ps in cyclohexane to 12 ns in acetone.

TL;DR: In this paper, the XPS spectra of a number of paramagnetic Co(II) compounds are studied and the correlation between the intensity of the Co 2p 3 2 satellite and the magnitude of its magnetic moment is shown.

TL;DR: The fluorescence lifetime of trans-stilbene in dilute methylcyclohexane/ isohexane solution has been measured and the mean S 1 radiative (k F ), radiationless ( k I ) and cis -isomerization ( k C ) rate parameters have been determined from −90 to 60°C as mentioned in this paper.