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Journal articles on the topic 'Quadrupole coupling'

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Published: 4 June 2021

Last updated: 11 February 2022

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1

Pietraß, Tanja, Paul K. Burkert, and Hans H. Karsch. "7Li-Solid-State-NMR of [Li(N,N,N',N'-Tetramethylethylenediamine)] CLO4 and [Li (N,N,N', N'-Tetramethylethylenediamine)2] Al(CH3)4." Zeitschrift für Naturforschung A 47, no. 1-2 (February 1, 1992): 117–19. http://dx.doi.org/10.1515/zna-1992-1-220.

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Abstract The temperature dependent 7Li-solid-state-NMR spectra of the two compounds [Li(N,N,N',N'- tetramethylethylenediamine)]ClO4 and [Li(N,N,N\N tetramethylethylenediamine)2]Al(CH3)4 are presented. Both compounds were investigated in the temperature range 160 K ≦ T ≦ 360 K. Above room temperature, the spectra for the tetramethylaluminate show the typical line shape for a first-order quadrupolar-disturbed central transition with an axially symmetric asymmetry parameter and a slightly positive temperature dependence of the quadrupole coupling constant. The mean temperature coefficient ά = + 9 • 10-4 K -1 . The quadrupole coupling constant is in the range of 36-39 kHz. In the Temperature range 240 K ≦ T ≦ 275 K the quadrupolar splitting cannot be resolved. Below 240 K the quadrupole coupling constant is about 100 kHz. Contrarily, in the Perchlorate the quadrupole coupling constant is 75 kHz and is temperature independent. With increasing temperature the satellites lower in intensity and the central transition undergoes motional narrowing

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2

Roehrig, M. A., and S. G. Kukolich. "Quadrupole coupling measurements on35ClNO." Molecular Physics 76, no. 1 (May 1992): 221–27. http://dx.doi.org/10.1080/00268979200101271.

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3

Brownlee, RTC, BP Shehan, and AG Wedd. "Applications of 95Mo N.M.R. Spectroscopy. XVIII. Relaxation Times, Quadrupole Coupling Constants and Partial Field Gradients in [Mo(CO)5L] Complexes." Australian Journal of Chemistry 41, no. 9 (1988): 1457. http://dx.doi.org/10.1071/ch9881457.

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A study of ,95Mo spin-lattice relaxation times (T1) and linewidths of [Mo(CO)5L] complexes, where L = PPh3, AsPh3, SbPh3, pyridine and Cl-, has shown that the relaxation times are due entirely to the quadrupolar mechanism, with no scalar coupling contribution to linewidth where molybdenum is bonded to a quadrupolar nucleus. Based on the literature value of the quadrupole coupling constant obtained by n.q.r . for the PPh3 complex (1.972 MHz), the quadrupole coupling constants of the arsine and stibine complexes are determined to be 3.36 and 3.75 MHz respectively. These values, and that of the pyridine complex (2.80 MHz), are found to correlate with ligand partial field gradient parameters obtained from Mossbauer spectra of FeII complexes, and are rationalized in terms of metal- ligand bonding interactions. For Et4N [Mo(CO)5Cl], the correlation is very poor; this result is attributed to the effects of ion in solution.

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4

Heineking, N., M. Andolfatto, C. Kruse, W. Eberstein, and H. Dreizler. "Deuterium Quadrupole Coupling Constants of Deuterohalogenoacetylens." Zeitschrift für Naturforschung A 43, no. 8-9 (September 1, 1988): 755–57. http://dx.doi.org/10.1515/zna-1988-8-907.

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Abstract Employing the high resolution of microwave Fourier transform spectroscopy, we investigated the lowest rotational transitions of fluoro-, bromo-, and iodoacetylene-d. Along with the rotational, centrifugal distortion, halogen nuclear quadrupole, and halogen spin-rotation coupling constants, we determined the deuterium quadrupole coupling constants of bromo-and iodoacetylene-d. For fluoroacetylene-d, we redetermined the deuterium nuclear quadrupole coupling constants with higher accuracy.

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5

Vormann, Kirsten, and Helmut Dreizler. "11Boron Quadrupole Hyperfine Structure in the Rotational Spectrum of Hydroxydifluoroborane." Zeitschrift für Naturforschung A 44, no. 12 (December 1, 1989): 1191–95. http://dx.doi.org/10.1515/zna-1989-1211.

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Abstract The 11B quadrupole hyperfine structure in the rotational spectra of three isotopic species of hydroxydifluoroborane, BF2OH, BF2OD, and BF218OH has been investigated and the quadrupole coupling constants of these species have been determined. Using the variation of the 11B quadrupole coupling constants with isotopic substitution, it has been possible to evaluate the complete quadrupole coupling tensor, including the off-diagonal element %ab, for each isotopic species.

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6

Egerton, R. F., and P. A. Crozier. "Quadrupole/YAG Coupling of a parallel-recording system to a commercial energy-loss spectrometer." Proceedings, annual meeting, Electron Microscopy Society of America 44 (August 1986): 620–21. http://dx.doi.org/10.1017/s0424820100144541.

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We have interfaced a Tracor DARSS detector head to a Gatan 607 energy-loss spectrometer to produce a parallel-recording system operating in the indirect-exposure mode. Magnetic quadrupole lenses were used to increase the electron-optical dispersion by a factor of at least 20. These quadrupoles had a large bore (2 cm) and were mounted outside the vacuum (see Fig.1) to allow easy relocation so that various electron-optical arrangements could be investigated.The most economical scheme requires only a single quadrupole, placed close to the spectrometer exit, operating from a virtual object and forming a non-inverted spectrum at the conversion screen.

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7

Seliger, J., V. Ẑagar, R. Blinc, H. Arend, and P. Günter. "14N quadrupole coupling in COANP." Chemical Physics Letters 142, no. 5 (December 1987): 334–35. http://dx.doi.org/10.1016/0009-2614(87)85117-5.

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8

Shea, J. C., and S. G. Kukolich. "Quadrupole coupling measurements on IF5." Chemical Physics Letters 168, no. 5 (May 1990): 489–92. http://dx.doi.org/10.1016/0009-2614(90)85149-7.

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9

Bhattacharjee, Ratan, J. S. Muenter, and Mark D. Marshall. "Nuclear quadrupole coupling in D2O." Journal of Molecular Spectroscopy 145, no. 2 (February 1991): 302–7. http://dx.doi.org/10.1016/0022-2852(91)90117-s.

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10

Eaton, Donald R., Richard J. Buist, and Brian G. Sayer. "The 59Co nuclear magnetic resonance spectra of polycrystalline complexes." Canadian Journal of Chemistry 65, no. 6 (June 1, 1987): 1332–35. http://dx.doi.org/10.1139/v87-223.

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The solid state 59Co nmr spectra of a number of octahedral complexes are reported. In the case of sodium hexanitrocobaltate(III) the spectra have been obtained at several different field strengths and the results are analysed to give a quadrupole coupling constant of 9.4 MHz, an asymmetry parameter of zero and an axial chemical shift tensor with an anisotropy of 180 ppm. Several other complexes have been examined at high field (11.8 T) to minimize the effects of quadrupole coupling and maximize the influence of chemical shift anisotropy. The results are, where possible, compared with single crystal X-ray and low field nmr data. It is concluded that high fields are necessary to obtain reliable chemical shift anisotropy values. The conditions necessary for obtaining reasonable quality spectra from polycrystalline samples containing quadrupolar nuclei are discussed.

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11

Sham, Simon, and Gang Wu. "Zinc-67 NMR study of tetrahedral and octahedral zinc sites with symmetrical oxygen, nitrogen, and sulfur ligands." Canadian Journal of Chemistry 77, no. 11 (November 1, 1999): 1782–87. http://dx.doi.org/10.1139/v99-154.

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We report a 67Zn nuclear magnetic resonance (NMR) study of compounds containing zinc ions coordinated by oxygen, nitrogen, and sulfur ligands. New information concerning 67Zn nuclear quadrupole coupling constants (NQCC) and chemical shift was obtained from magic-angle spinning (MAS) spectra of solid compounds containing both natural abundance and enriched 67Zn isotopes. Rapid ligand exchange processes of [Zn(thiourea)4]2+ in aqueous solutions were also observed.Key words: 67Zn NMR, nuclear quadrupolar coupling constant, ligand exchange.

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12

Ehrlichmann, H., J. U. Grabow, H. Dreizler, N. Heineking, and M. Andolfatto. "Nitrogen and Deuterium Hyperfine Structure in the Rotational Spectrum of Piperidine." Zeitschrift für Naturforschung A 44, no. 9 (September 1, 1989): 841–47. http://dx.doi.org/10.1515/zna-1989-0912.

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Abstract We reinvestigated by microwave Fourier transform spectroscopy the rotational spectra of the axial and equatorial isotopomers of piperidine and N-deutero piperidine. The rotational, centrifugal, and nitrogen quadrupole coupling constants were improved, the deuterium quadrupole coupling constants were determined. The principal coupling tensor elements for nitrogen were estimated.

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13

Seliger, J., and R. Blinc. "2 D Methods in NQR Spectroscopy." Zeitschrift für Naturforschung A 47, no. 1-2 (February 1, 1992): 333–41. http://dx.doi.org/10.1515/zna-1992-1-258.

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AbstractThe application of two-dimensional spectroscopy to nuclear quadrupole resonance (NQR) is reviewed with special emphasys on spin 3/2 nuclei. A new two-dimensional level crossing double resonance NQR nutation technique based on magnetic field cycling is described. This technique allows for a determination of both the electric quadrupole coupling constant and the asymmetry parameter for spin 3/2 nuclei in powdered samples even in cases where the quadrupolar signals are too weak to be observed directly. It works if the usual double resonance conditions are met, i.e. if the spin-lattice relaxation times are not too short if the quadrupolar nuclei are dipolarly coupled to "strong" nuclei. Variations of this techique can be also used for 2 D "exchange" NQR spectroscopy and NQR imaging.

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14

Heineking, N., M. C. L. Gerry, and H. Dreizler. "Deuterium Nuclear Quadrupole Coupling in Deutero-Isocyanic Acid." Zeitschrift für Naturforschung A 44, no. 6 (June 1, 1989): 577–79. http://dx.doi.org/10.1515/zna-1989-0614.

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The deuterium quadrupole hyperfine structure has been resolved in the 6(1, 5)-6(1, 6) transition of deutero-isocyanic acid (DNCO), and has been used to evaluate the previously undetermined coupling constant (Χbb - Χcc)- With the assumption of cylindrical symmetry for the deuterium quadrupole coupling tensor its principal values have been estimated and have been found to be in excellent agreement with a theoretical prediction. Within experimental error the z-principal quadrupole axis and the D -N internuclear axis coincide.

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15

Segel, S. L., R. J. C. Brown, E. E. Ylinen, L. P. Ingman, and T. J. Bastow. "Quadrupole Coupling in Ammonium Metaperiodate at Low Temperature." Zeitschrift für Naturforschung A 57, no. 8 (August 1, 2002): 661–62. http://dx.doi.org/10.1515/zna-2002-0804.

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The temperature dependences of the 127I nuclear quadrupole coupling in NH4IO4 and in ND4IO4 are reported. In each salt, the quadrupole coupling decreases to a very small value at low temperatures, and in the case of ND4IO4 passes through zero and changes sign at 87 K.

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16

Kretschmer, U., and H. Dreizler. "33S Nuclear Hyperfine Structure in the Rotational Spectrum of Thiazole." Zeitschrift für Naturforschung A 48, no. 12 (December 1, 1993): 1219–22. http://dx.doi.org/10.1515/zna-1993-1211.

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Abstract We investigated the 33S nuclear quadrupole coupling of thiazole- 33S in natural abundance by molecular beam Fourier transform microwave spectroscopy. In addition the 14N nuclear quadrupole coupling could be analyzed with high precision. We derived the rotational constants A = 8529.29268 (70) MHz, B = 5427.47098 MHz, and C = 3315.21676 (26) MHz, quartic centrifugal distortion constants and the quadrupole coupling constants of 33S χaa = 7.1708 (61) MHz and χbb= -26.1749 (69) MHz and of 14N χ aa = -2.7411 (61) MHz and χbb = 0.0767 (69) MHz.

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17

Gripp, J., U. Kretschmer, and H. Dreizler. "The 33S Nuclear Hyperfine Structure in the Rotational Spectrum of Isothiazole." Zeitschrift für Naturforschung A 49, no. 11 (November 1, 1994): 1059–62. http://dx.doi.org/10.1515/zna-1994-1111.

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Abstract We investigated the 33S nuclear quadrupole coupling in the rotational spectrum of isothiazole in natural abundance by molecular beam Fourier transform microwave spectroscopy. In addition the 14N nuclear quadrupole coupling could be analyzed with high precision. We derived the rotational constants A = 8275.51880(80) MHz, B = 5767.06181 (40) MHz, and C = 3396.85702(36) MHz, quartic centrifugal distortion constants, and the quadrupole coupling constants χaa (33S) = 8.7015 (57) MHz, χbb(33S) = -32.9696(60) MHz, χaa(14N) = 1.0732(47) MHz and χbb(14N) = -2.4753(46) MHz.

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18

Davis, J., D. Tinet, J. J. Fripiat, J. M. Amarilla, B. Casal, and E. Ruiz-Hitzky. "51V and 93Nb high resolution NMR study of NbVO5." Journal of Materials Research 6, no. 2 (February 1991): 393–400. http://dx.doi.org/10.1557/jmr.1991.0393.

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NbVO5 is characterized by 51V and 93Nb NMR resonance frequencies strongly upfield shifted when compared to those in model compounds V2O5 and LiNbO3. The chemical shift anisotropy dominates the 51V observed spectrum in a magnetic field of 11.7 T. The asymmetry parameter ηc is 0.2 and the quadrupole coupling constant is relatively small (1 MHz). The quadrupolar Hamiltonian overwhelmingly dominates the 93Nb spectrum (ηQ = 0.9) and the quadrupole coupling constant is huge (16.5 MHz). In agreement with the structure obtained from the x-ray powder diagram the isotropic chemical shift of 51V suggests that NbVO5 is indeed an orthovanadate. Interestingly, in NbVO5 the isotropic chemical shift of 93Nb reveals a better shielding of the 93Nb nucleus and a lower electric field gradient than in LiNbO3. Nb octahedra in NbVO5 are sharing corners whereas they share edges in LiNbO3.

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19

Olliges, J., A. Lötz, J. Voitländer, H. Barfuss, G. Böhnlein, F. Gubitz, W. Ittner, G. Lanzendorfer, W. Kreische, and B. Röseler. "Boron, Nitrogen, and Fluorine Nuclear Quadrupole Coupling and the Electronic Structure of the Boron—Nitrogen Single Bond." Zeitschrift für Naturforschung A 41, no. 1-2 (February 1, 1986): 203–5. http://dx.doi.org/10.1515/zna-1986-1-234.

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The 11B and 19F nuclear quadrupole couplings in F3BNHx(CH3)3-x compounds are reported. The boron quadrupole couplings were measured by quadrupole perturbed NMR in the solid state. The fluorine quadrupole couplings were obtained by the time-differential observation of the angular distribution of the gamma radiation after excitation of the fluorine nuclei with accelerated protons (TDPAD). The results are discussed in connection with the nitrogen quadrupole couplings in F3BNHxR3-x compounds, and the nitrogen and boron quadrupole couplings in H3BNHxR3-x: compounds which were previously determined by nuclear quadrupole double resonance. In the F3BNHxR3-x series of compounds, the donor-acceptor character of the B -N bond appears to be less im portant than in the H3BNHxR3-x compounds in favour of a more ionic character of the bond with a higher negative charge on nitrogen.

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20

Heineking, N., M. Andolfatto, U. Keussen, A. Mues, and H. Dreizler. "Deuterium Quadrupole Coupling Constants in Deuterochloroacetylene." Zeitschrift für Naturforschung A 44, no. 8 (August 1, 1989): 735–37. http://dx.doi.org/10.1515/zna-1989-0809.

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Abstract The deuterium and chlorine nuclear quadrupole coupling constants have been determined for both of the chlorine isotopomers of deuterochloroacetylene (DCCC1), along with the rotational, centrifugal distortion, and chlorine spin-rotation coupling constants. The values are B = 5186.97631 (22) MHz, DJ= 1.13(2) kHz, eQq(Cl)= -79.7358(19) MHz, cI(Cl) = 1.10(31)kHz, and eQq(D) = 207.0(28)kHz for DCCCl-35, and B = 5084.17839(30) MHz, DJ = 0.99(2) kHz, eQq(Cl)= -62.8451(27) MHz, cI(CI) = 0.76(43) kHz, and eQq(D) = 205.8(39)kHz for DCCCl-37.

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21

Halkier, Asger, Michał Jaszuński, and Poul Jørgensen. "Nuclear quadrupole coupling constants in NH4Cl." Physical Chemistry Chemical Physics 1, no. 18 (1999): 4165–68. http://dx.doi.org/10.1039/a905831a.

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22

Pyykkö, Pekka, and Michael Seth. "Relativistic effects in nuclear quadrupole coupling." Theoretical Chemistry Accounts: Theory, Computation, and Modeling (Theoretica Chimica Acta) 96, no. 2 (July 18, 1997): 92–104. http://dx.doi.org/10.1007/s002140050209.

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23

Grabow, J. U., H. Ehrlichmann, and H. Dreizler. "Nitrogen and Deuterium Hyperfine Structure in the Rotational Spectrum of Morpholine." Zeitschrift für Naturforschung A 44, no. 9 (September 1, 1989): 833–36. http://dx.doi.org/10.1515/zna-1989-0910.

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Abstract We reinvestigated the rotational spectra of morpholine and N-deutero morpholine with the higher precision of microwave Fourier transform spectroscopy. The rotational, centrifugal, and nitrogen quadrupole coupling constants were improved and the deuterium quadrupole coupling constants determined.

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24

NASELSKY, PAVEL D., and OLEG V. VERKHODANOV. "PECULIARITIES OF PHASES OF THE WMAP QUADRUPOLE." International Journal of Modern Physics D 17, no. 01 (January 2008): 179–94. http://dx.doi.org/10.1142/s0218271808011936.

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We present the analysis of the quadrupole phases of the Internal Linear Combination map, ILC(I) and (III), derived by the WMAP team (one- and three-year data release). This approach allows us to see the global trend of non-Gaussianity of the quadrupoles for the ILC(III) map through phase correlations with the foregrounds. Significant phase correlations are found between the ILC(III) quadrupole and the WMAP foreground phases for the K-W band: the phases of the ILC(III) quadrupole ξ2,1, ξ2,2 and those of the foregrounds at K–W bands Φ2,1, Φ2,2 display significant symmetry: ξ2,1 + Φ2,1 ≃ ξ2,2 + Φ2,2, which is a strong indication that the morphology of the ILC(III) quadrupole is a mere reflection of that the foreground quadrupole through coupling. To clarify this issue we exploit the symmetry of the CMB power, which is invariant under permutation of the index m = 1 ⇔ 2. By simple rotation of the ILC(III) phases with the same angle we reach the phases of the foreground quadrupole. We discuss possible sources of phase correlation and come to the conclusion that the phases of the ILC(III) quadrupole reflect most likely systematic effects such as changing of the gain factor for the three-year data release with respect to the one-year, rather than manifestation of the primordial non-Gaussianity.

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25

Lötz, A., J. Voitländer, D. Stephenson, and J. A. S. Smith. "Nuclear Quadrupole Double Resonance of Compounds with Transannular Boron—Nitrogen Bonds." Zeitschrift für Naturforschung A 41, no. 1-2 (February 1, 1986): 200–202. http://dx.doi.org/10.1515/zna-1986-1-233.

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The boron and nitrogen nuclear quadrupole double resonance spectra of several ring compounds with transannular boron-nitrogen bonds are reported. The electron donation from nitrogen to boron as seen by their quadrupole coupling parallels the boron-nitrogen bond lengths. One of the compounds exhibits a transannular valence topomerisation between two identical boron-nitrogen pairs in solution which is frozen in the solid state but may possibly exist in a preformed state of this equilibrium from its quadrupole coupling. The oxygen-boron π-bond in boroxines, whose extent is deduced from the quadrupole coupling in one of the compounds with a boroxine-like structure at boron and in (PhBO)3, is approximately half as strong as the nitrogen-boron π-bond in borazine.

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26

Pang, Huajian, Hongxin Huang, Lidan Zhou, Yuheng Mao, Fu Deng, and Sheng Lan. "Strong Dipole–Quadrupole–Exciton Coupling Realized in a Gold Nanorod Dimer Placed on a Two-Dimensional Material." Nanomaterials 11, no. 6 (June 20, 2021): 1619. http://dx.doi.org/10.3390/nano11061619.

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Simple systems in which strong coupling of different excitations can be easily realized are highly important, not only for fundamental research but also for practical applications. Here, we proposed a T-shaped gold nanorod (GNR) dimer composed of a long GNR and a short GNR perpendicular to each other and revealed that the dark quadrupole mode of the long GNR can be activated by utilizing the dipole mode excited in the short GNR. It was found that the strong coupling between the dipole and quadrupole modes can be achieved by exciting the T-shaped GNR dimer with a plane wave. Then, we demonstrated the realization of strong dipole–quadrupole–exciton coupling by placing a T-shaped GNR on a tungsten disulfide (WS2) monolayer, which leads to a Rabi splitting as large as ~299 meV. It was confirmed that the simulation results can be well fitted by using a Hamiltonian based on the coupled harmonic oscillator model and the coupling strengths for dipole–quadrupole, dipole–exciton and quadrupole–exciton can be extracted from the fitting results. Our findings open new horizons for realizing strong plasmon–exciton coupling in simple systems and pave the way for constructing novel plasmonic devices for practical applications.

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27

Hartmann, P., and G. Scheler. "Ist 91Zr-Festkörper-Kernresonanzspektroskopie praktikabel?" Zeitschrift für Naturforschung A 50, no. 1 (January 1, 1995): 90–94. http://dx.doi.org/10.1515/zna-1995-0112.

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Abstract91Zr solid state NMR spectra have been observed for samples possessing different zirconium local-site environments (e.g. phosphates, fluorides). Depending on the quadrupole coupling, different NMR experiments have been utilized. In case of weak quadrupole coupling, magic angle spinning (MAS) is suitable. Otherwise, spin echo techniques are necessary to overcome “acoustic ringing’’ and receiver dead-time limitations. Using the step echo method, the detection of the very broad 91Zr signals is not limited by non-uniform spectral excitation. The obtained 91Zr chemical shifts range from -246 ppm to 208 ppm, the quadrupole coupling frequencies from 50 kHz to 2.7 MHz..

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28

Heldmann, C., H. Dreizler, and R. Schwarz. "Investigation of the Microwave Spectrum of cis-Cyclopropyl Carbonyl Chloride-(35Cl); Determination of the Quadrupole Coupling Tensor in its Principal Axes System." Zeitschrift für Naturforschung A 45, no. 9-10 (October 1, 1990): 1169–74. http://dx.doi.org/10.1515/zna-1990-9-1015.

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Abstract The vibrational ground state microwave spectrum of cis-cyclopropyl carbonyl chloride-(35Cl) was investigated in the region from 4 to 40 GHz by microwave Fourier transform (MWFT) spectroscopy. The rotational and fourth order centrifugal distortion constants were determined. The quadrupole hyperfine structure was assigned and the quadrupole coupling constants including the off-diagonal element i ab were evaluated. This leads to a transformation of the quadrupole coupling tensor into its principal axes system.

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29

Lucken, E. A. C. "A Theoretical Study of the Vibrational Dependence of the Nuclear Quadrupole Coupling Constants of some Diatomic Molecules." Zeitschrift für Naturforschung A 49, no. 1-2 (February 1, 1994): 133–36. http://dx.doi.org/10.1515/zna-1994-1-221.

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Abstract The nuclear quadrupole coupling constant was calculated as a function of inter nuclear distance for nine quadrupolar nuclei in eight diatomic molecules by the STO 321G method. From the value of the field-gradient and its first and second derivatives the vibrational dependence of the coupling constants were calculated and shown to com pare satisfactorily with experiment. The behaviour of the field-gradient as a function of inter nuclear distance can in most cases be rationalized in terms of the field-gradient that will arise for the infinitely separated atoms.

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30

Cook, Desmond C. "Measurement of Nuclear Quadrupole Interactions using Mössbauer Spectroscopy." Zeitschrift für Naturforschung A 51, no. 5-6 (June 1, 1996): 368–72. http://dx.doi.org/10.1515/zna-1996-5-610.

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Abstract Mössbauer spectroscopy is a useful probe for investigating nuclear quadrupole interactions. It enables the magnitude, sign and asymmetry of the electric quadrupole coupling constant to be determined. It is especially important for its ability to measure these parameters for excited nuclear states. The Mössbauer effect is used to measure excited state quadrupole moments in materials whose electric field gradient (EFG) is known. More commonly however, it is used to determine the EFG from which atomic bonding and electronic structure are determined. The technique also allows temperature dependent orientation of sublattice magnetization to be measured using the direction of the electric quadrupole coupling as a reference.

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31

IWASAKI, HIROTOMO. "A NEW METHOD TO MEASURE THE ELECTROMAGNETIC PROPERTY OF THE W BOSON IN e+e− COLLISIONS." International Journal of Modern Physics A 07, no. 14 (June 10, 1992): 3291–310. http://dx.doi.org/10.1142/s0217751x92001460.

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With the effective WW γ couplings incorporating the magnetic dipole, electric dipole, magnetic quadrupole and electric quadrupole moments of the W boson, the cross-section of e+e− → e±νe W ∓ is evaluated exactly and its sensitivity to these moments is investigated. The background elimination is discussed for the measurement of the WW γ couplings, and the resulting event rate of the single-W production is evaluated at [Formula: see text] and 500 GeV. Also, a new method for the precision measurement of the WW γ coupling is proposed: it utilizes the distinction of the W boson energy distributions of the annihilation and nonannihilation contributions and reduces the systematic errors.

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32

Smith, J. A. S. "Nuclear Quadrupole Resonance: The Present State and Further Development." Zeitschrift für Naturforschung A 41, no. 1-2 (February 1, 1986): 453–62. http://dx.doi.org/10.1515/zna-1986-1-289.

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The importance of nuclear electric quadrupole interactions in chemistry, both present and future, depends very much on their power to resolve problems in electronic structure and molecular dynamics. Fortunately, the subject, by its very nature, is “multinuclear”; even if the ground state of a given nucleus is non-quadrupolar, there often exist excited nuclear states which are, an example being 19F, for which quadrupole coupling constants are now being published from angular correlation measurements. Other new techniques are constantly extending the range of the experiments, recent examples being the use of SQUID magnetometers to detect acoustic 121Sb and 123Sb quadrupole resonance in antimony metal and Fourier transform quadrupole resonance spectroscopy based on fast field cycling to measure 2H quadrupole interactions in powders. Recently, much work on quadrupole interactions in solids of half-integral spin nuclei such as 17O or 27Al has been pursued in two different ways; by quadrupole double resonance in natural abundance, and nuclear magnetic resonance in very high magnetic fields, for which enrichment of low-abundance nuclei such as 170 is often required. In the liquid phase, measurements are now sufficiently reliable for comparisons of changes in the nuclear electric quadrupole tensor from gas to liquid and solid phases to be made. The new methods of partial alignment of polar molecules in the liquid phase in strong electric fields, or magnetically anisotropic molecules in high magnetic fields, seem certain to contribute to these developments.

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33

Gerry, M. C. L., S. J. Howard, N. Heineking, and H. Dreizler. "The Microwave Spectrum and Nuclear Quadrupole Coupling Constants of HNC17O." Zeitschrift für Naturforschung A 44, no. 12 (December 1, 1989): 1187–90. http://dx.doi.org/10.1515/zna-1989-1210.

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Abstract The microwave spectrum of HNC17O is reported for the first time. The measurements were made with both Stark modulated and microwave Fourier transform spectrometers. The 17O and 14N quadrupole hyperfine structure has been resolved and rotational, centrifugal distortion and 17O and 14N quadrupole coupling constants have been evaluated. The 17O coupling constants are compared with those from an ab initio prediction.

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34

Lorenzo, Felipe, José L. Alonso, J. U. Grabow, and H. Dreizler. "The 33S Nuclear Quadrupole Coupling in the Rotational Spectrum of Methylthiirane." Zeitschrift für Naturforschung A 51, no. 10-11 (November 1, 1996): 1096–98. http://dx.doi.org/10.1515/zna-1996-10-1107.

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Abstract As a first example in a series of substituted thiiranes we present an investigation of the nuclear quadrupole coupling in 33S-methylthiirane in natural abundance. The rotational and quadrupole coupling constants are: A = 11 599.0976(18) MHz, B = 4815.6822(6)MHz, C = 3909.1318 (5) MHz, χaa = -12.7731 (82) MHz, χbb = -20.3366(118) MHz, χcc = 33.1097(273) MHz.

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35

Chapman, Rebecca P., Jennifer R. Hiscock, Philip A. Gale, and David L. Bryce. "A solid-state 35/37Cl NMR study of a chloride ion receptor and a GIPAW-DFT study of chlorine NMR interaction tensors in organic hydrochlorides." Canadian Journal of Chemistry 89, no. 7 (July 2011): 822–34. http://dx.doi.org/10.1139/v10-177.

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The results of a 35/37Cl solid-state nuclear magnetic resonance (SSNMR) study of the 1-butyl-3-methylimidazolium chloride complex of meso-octamethylcalix[4]pyrrole (1) are reported. Line shapes obtained from magic-angle-spinning and stationary powder samples collected at 9.4 and 21.1 T are analyzed to provide the 35/37Cl quadrupolar tensor and chemical shift (CS) tensor and their relative orientation. The relatively high symmetry of the chloride ion coordination environment is manifested in the small value of the quadrupole coupling constant, CQ(35Cl) = 1.0 MHz. The isotropic chemical shift of 120 ppm (with respect to NaCl(s)) is at the upper edge of the typical range seen for organic hydrochlorides. Consideration of chemical shift anisotropy (span, Ω = 50 ppm) and non-coincidence of the quadrupolar and CS tensors were essential to properly simulate the experimental spectra. The utility of gauge-including projector-augmented wave density functional theory (GIPAW-DFT) calculations of chlorine quadrupolar and CS tensors in organic chlorides was explored by validation against available benchmark experimental data for solid amino acid hydrochlorides. The calculations are shown to systematically overestimate the value of the 35Cl quadrupole coupling constant. Additional calculations on various hydrated and solvated models of 1 are consistent with a structure in which solvent and water of hydration are absent.

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36

Frank, M., F. Gubitz, W. Ittner, W. Kreische, A. Labahn, B. Röseler, and G. Weeske. "19F Nuclear Quadrupole Coupling in some Halomethanes." Zeitschrift für Naturforschung A 41, no. 1-2 (February 1, 1986): 171–74. http://dx.doi.org/10.1515/zna-1986-1-226.

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The 19F quadrupole coupling constants in CF4, CHF3, CClF3 and CHClF2 are reported. The measurements were carried out temperature dependent using the time differential perturbed angular distribution method (TDPAD). The temperature dependence can be satisfactorily described in the framework of the Bayer-Kushida theory. A simple model is used to explain the appearance of H-F and Cl-F coupling constants in CHF3/CHClF2 and CClF3, respectively.

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37

Storm, V., and H. Dreizler. "Boron Nuclear Quadrupole Coupling in BF(OH)2." Zeitschrift für Naturforschung A 52, no. 12 (December 1, 1997): 874–76. http://dx.doi.org/10.1515/zna-1997-1207.

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We investigated the nuclear quadrupole coupling of the 11B and 10B nuclei in fluorodihydroxy borane, BF(OH)2. An analysis of the hyperfine splittings resulted in the coupling constants %aa = -1.414(11) MHz, %bb = - 1.206(11) MHz, %cc = 2.620(11) MHz for 11B and %aa = -2.872(67) MHz, y M = -2.525(69) MHz, %cc = 5.397(69) MHz for 10B. From these constants the ratio r of the quadrupole moments r = Q(10B)/Q(11B) = 2.051 (44) could be derived and compared to data taken from the literature

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38

Müller-Warmuth, W. "The Structure of Glasses Studied by MAS-NMR Spectroscopy of Quadrupolar Nuclei." Zeitschrift für Naturforschung A 51, no. 5-6 (June 1, 1996): 585–90. http://dx.doi.org/10.1515/zna-1996-5-637.

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High-resolution solid state NMR spectroscopy of quadrupolar nuclei (preferentially27Al) has been employed to study the microstructure of glasses. Importance has been attached tothe extraction of the fundamental NMR parameters like chemical shift, quadrupole coupling constantetc., from the spectra, first of all by applying satellite transition spectroscopy. Exemplary resultsare represented for ternary oxide glass systems such as K2O-Al2O3-SiO2, B2O3-Al2O3-P2O5, Na2O-B2O3-SiO2 and Na2O-B2O3-Al2O3.

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39

Grabow, Jens-Uwe, and Helmut Dreizler. "The 33S Nuclear Quadrupole Coupling in the Rotational Spectrum of anti-2,3-Dimethylthiirane." Zeitschrift für Naturforschung A 51, no. 10-11 (November 1, 1996): 1107–9. http://dx.doi.org/10.1515/zna-1996-10-1109.

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Abstract The rotational spectrum of 33S anti-2,3-dimethylthiirane with its 33S nuclear quadrupole coupling hyperfine structure in the range 7.6 to to 21.5 GHz and its analysis is reported. The rotational constants are A = 5331.1401(5), B = 3506.3963(10), and C = 2356.9273(2) MHz. The 33S quadrupole coupling constants are χaa = 8.3871(93), χbb = -32.3291(174), and χcc = 23.9420(174) MHz.

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40

Grabow, Jens-Uwe, Masao Onda, and Helmut Dreizler. "The 33S Nuclear Quadrupole Coupling in the Rotational Spectrum of 2,2–Dimethylthiirane." Zeitschrift für Naturforschung A 51, no. 10-11 (November 1, 1996): 1110–12. http://dx.doi.org/10.1515/zna-1996-10-1110.

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Abstract The rotational spectrum of 33S 2,2-dimethylthiirane with its 33S nuclear quadrupole coupling hyperfine structure in the range 8.9 to 20.0 GHz and its analysis is reported. The rotational constants are A = 5507.4663(3), B = 3440.58395(18), and C = 2978.5723(3) MHz. The 33 S quadrupole coupling constants are χaa = -22.6390(23), χbb = 47.1830(50), and χcc = -24.5440(50) MHz.

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41

Brown, R. D., and M. P. Head-Gordon. "Ab initiocalculation of14N nuclear quadrupole coupling constants." Molecular Physics 61, no. 5 (August 10, 1987): 1183–91. http://dx.doi.org/10.1080/00268978700101721.

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42

Hillig, Kurt W., and Robert L. Kuczkowski. "Boron nuclear quadrupole coupling in trimethylphosphine-borane." Inorganic Chemistry 26, no. 14 (July 1987): 2232–34. http://dx.doi.org/10.1021/ic00261a014.

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43

Kukolich, S. G., J. V. Rund, D. J. Pauley, and R. E. Bumgarner. "Nitrogen quadrupole coupling in cyclopentadienyl nickel nitrosyl." Journal of the American Chemical Society 110, no. 22 (October 1988): 7356–57. http://dx.doi.org/10.1021/ja00230a015.

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44

Ruessink, B. H., W. J. Van der Meer, and C. MacLean. "Sulfur-33 quadrupole coupling tensor of sulfolane." Journal of the American Chemical Society 108, no. 2 (January 1986): 192–95. http://dx.doi.org/10.1021/ja00262a002.

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45

Fliege, E., and H. Dreizler. "Nitrogen Quadrupole Coupling in Ethyl Isocyanide, C2H5NC." Zeitschrift für Naturforschung A 40, no. 1 (January 1, 1985): 43–45. http://dx.doi.org/10.1515/zna-1985-0109.

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In this paper we present a 14N-quadrupole hyperfine structure analysis for ethyl isocyanide, CH3CH2NC, by use of microwave Fourier transform spectroscopy. For earlier works as e.g. CH3NC [1], such narrow splittings as they are met with in the case of the isonitriles had to be measured employing a maser beam spectrometer.

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46

Santhanam, V., and J. Sobhanadri. "Nuclear Quadrupole Coupling Constant and Conformational Studies." Zeitschrift für Naturforschung A 41, no. 1-2 (February 1, 1986): 166–68. http://dx.doi.org/10.1515/zna-1986-1-224.

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A molecular conformation study on three 3-monosubstituted derivatives of propene has beencarried out by evaluating the EFG at the site of the halogen nucleus using a semi-empiricalLCAO-MO-SCF method. Calculations are performed on several conformers at INDO andCNDO level, using “sp” and “spd” valence basis sets, with Slater type orbitals as the basisfunctions. The results obtained for various conformers indicate that the nuclear quadrupolecoupling constant is practically independent of the orientation of the CH2X group (X = Cl, Brand I) (Figure 1). The mean value of e2 Qqzz/h (averaged over all conformers) in each systemmatches favourably with the experimental value, despite the severe approximations that areinherent in the semi-empirical theory as well as in its application in the evaluation of the EFG.

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47

Christillin, P., and G. Dillon. "On the γNΔ quadrupole coupling constant(s)." Journal of Physics G: Nuclear and Particle Physics 16, no. 6 (June 1, 1990): 805–11. http://dx.doi.org/10.1088/0954-3899/16/6/005.

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48

Haubrich, S. T., M. A. Roehrig, and S. G. Kukolich. "Structure and quadrupole coupling measurements on ClF3." Journal of Chemical Physics 93, no. 1 (July 1990): 121–25. http://dx.doi.org/10.1063/1.459611.

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49

Ruessink, B. H., and C. Maclean. "Oxygen-17 quadrupole coupling in liquid acetone." Magnetic Resonance in Chemistry 25, no. 4 (April 1987): 365–67. http://dx.doi.org/10.1002/mrc.1260250419.

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50

Huber, Hanspeter. "Deuterium quadrupole coupling constants. A theoretical investigation." Journal of Chemical Physics 83, no. 9 (November 1985): 4591–98. http://dx.doi.org/10.1063/1.449030.

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