Relevant bibliographies by topics / Molecular rotation

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Molecular rotation'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 July 2024

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Journal articles on the topic "Molecular rotation"

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Mizuse, Kenta, Kenta Kitano, Hirokazu Hasegawa, and Yasuhiro Ohshima. "Quantum unidirectional rotation directly imaged with molecules." Science Advances 1, no. 6 (July 2015): e1400185. http://dx.doi.org/10.1126/sciadv.1400185.

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A gas-phase molecular ensemble coherently excited to have an oriented rotational angular momentum has recently emerged as an appropriate microscopic system to illustrate quantum mechanical behavior directly linked to classical rotational motion, which has a definite direction. To realize an intuitive visualization of such a unidirectional molecular rotation, we report high-resolution direct imaging of direction-controlled rotational wave packets in nitrogen molecules. The rotational direction was regulated by a pair of time-delayed, polarization-skewed laser pulses, introducing the dynamic chirality to the system. The subsequent spatiotemporal propagation was tracked by a newly developed Coulomb explosion imaging setup. From the observed molecular movie, time-dependent detailed nodal structures, instantaneous alignment, angular dispersion, and fractional revivals of the wave packet are fully characterized while the ensemble keeps rotating in one direction. The present approach, providing an accurate view on unidirectional rotation in quantum regime, will guide more sophisticated molecular manipulations by utilizing its capability in capturing highly structured spatiotemporal evolution of molecular wave packets.
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McDowell, Robin S. "Molecular Rotation Spectra." Physics Today 40, no. 4 (April 1987): 118–20. http://dx.doi.org/10.1063/1.2820000.

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Bunker, Philip R., W. G. Harter, and Eric J. Heller. "Molecular Rotation Spectra." Physics Today 38, no. 1 (January 1985): 13–124. http://dx.doi.org/10.1063/1.2813694.

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Bubenchikov, M. A., A. M. Bubenchikov, and D. V. Mamontov. "ROTATIONS AND VIBRATIONS OF FULLERENES IN THE MOLECULAR COMPLEX C20@C80." Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, no. 71 (2021): 35–48. http://dx.doi.org/10.17223/19988621/71/4.

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The aim of this work is to apply classical mechanics to a description of the dynamic state of C20@C80 diamond complex. Endohedral rotations of fullerenes are of great interest due to the ability of the materials created on the basis of onion complexes to accumulate energy at rotational degrees of freedom. For such systems, a concept of temperature is not specified. In this paper, a closed description of the rotation of large molecules arranged in diamond shells is obtained in the framework of the classical approach. This description is used for C20@C80 diamond complex. Two different problems of molecular dynamics, distinguished by a fixing method for an outer shell of the considered bimolecular complex, are solved. In all the cases, the fullerene rotation frequency is calculated. Since a class of possible motions for a single carbon body (molecule) consists of rotations and translational displacements, the paper presents the equations determining each of these groups of motions. Dynamic equations for rotational motions of molecules are obtained employing the moment of momentum theorem for relative motions of the system near the fullerenes’ centers of mass. These equations specify the operation of the complex as a molecular pendulum. The equations of motion of the fullerenes’ centers of mass determine vibrations in the system, i.e. the operation of the complex as a molecular oscillator.
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Rabinovich, Dov, Haim Rozenberg, and Zippora Shakked. "Molecular Replacement: the Revival of the Molecular Fourier Transform Method." Acta Crystallographica Section D Biological Crystallography 54, no. 6 (November 1, 1998): 1336–42. http://dx.doi.org/10.1107/s090744499800465x.

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The molecular Fourier transform method, perhaps the first application of the molecular-replacement approach, used in the 1950s for the two-dimensional structure determination of small molecules, has been modernised for the efficient solution of complex structures. In the modern application of the molecular Fourier transform (MFT), the three-dimensional transform of the molecular model is calculated and fitting is achieved by rotating the weighted reciprocal lattice with respect to the calculated transform. The fit between the transform and the weighted reciprocal lattice is gauged by three different criteria corresponding to R factor, correlation coefficient and product function. Since the procedure involves the rotation of indices and is, therefore, independent of the number of atoms, it is much faster than other methods which employ the rotation of the molecular model. This feature enabled the renovation of the rotation–translation search method ULTIMA, which utilizes low-order data and packing considerations for the efficient solution of large structures.
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Sasaki, Takahiro, Yasushi Akamatsu, Hideo Kobayashi, Shota Mitsuhashi, Shuntaro Nejima, Ken Kumagai, Tomoyuki Saito, and Yutaka Inaba. "Rotational Changes in the Distal Tibial Fragment Relative to the Proximal Tibial Fragment at the Osteotomy Site after Open-Wedge High-Tibial Osteotomy." BioMed Research International 2021 (February 1, 2021): 1–8. http://dx.doi.org/10.1155/2021/6357109.

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The present study is aimed at assessing the changes in tibial rotation at the osteotomy site after an open-wedge, high-tibial osteotomy (OWHTO) and analysing the factors that affect rotational changes in the distal tibial fragment relative to the proximal tibial fragment at the same site. This study involved 53 patients (60 knees; 16 males and 37 females) with medial osteoarthritis (OA) who underwent OWHTO and preoperative and 3-month postoperative computed tomography (CT) scans. Rotational angles of the distal tibia were measured using Stryker OrthoMap 3D by comparing preoperative and postoperative CTs. The mean rotational angle yielded an external rotation of2.9°±4.8°. There were 17 knees with internal rotations, 37 knees with external rotations, and one knee with no rotation. The rotational angle significantly correlated with the resultant change in the femorotibial angle (correction angle) and the angle between the ascending and transverse osteotomy lines on the anterior osteotomised surface on which a flange was formed with the distal tibial osteotomised surface (flange angle). The flange angle affected the rotation, but it may have been affected by our surgical technique. The rotational angle did not significantly correlate with the change in the angle of the posterior tibial slope or body mass index. There were significant correlations between the rotational angle and correction angle (r=0.42,p<0.05). Additionally, the rotational angle correlated with the flange angle (r=−0.41,p<0.05).
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Harano, Takayuki, Yasuo Takeichi, Takuji Ohigashi, Daisuke Shindo, Eiji Nemoto, Daisuke Wakabayashi, Shohei Yamashita, Reiko Murao, and Masao Kimura. "Azimuthal-rotation sample holder for molecular orientation analysis." Journal of Synchrotron Radiation 27, no. 5 (August 18, 2020): 1167–71. http://dx.doi.org/10.1107/s160057752000990x.

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In this study, an azimuthal-rotation sample holder compatible with scanning transmission X-ray microscopy was developed. This holder exhibits improvement in the accuracy of rotation angles and reduces the displacement of the rotation axes during azimuthal rotation by using a crossed roller bearing. To evaluate the performance of the holder, the authors investigated the dependence of the optical density around the C K-edge absorption of π-orbital-oriented domains in natural spherical graphite on the rotational angle by using linearly horizontally and vertically polarized undulator radiation. Based on the dependence of the optical density ratio between C 1s → π* and 1s → σ* excitation on the polarization angle of the X-rays, the average two-dimensional orientation angle of the π orbital in each position in a natural spherical graphite sample was visualized.
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Phillips, J. P. "Rotation in molecular clouds." Astronomy and Astrophysics Supplement Series 134, no. 2 (January 1999): 241–54. http://dx.doi.org/10.1051/aas:1999137.

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Okazaki, Kei-ichi, and Gerhard Hummer. "Elasticity, friction, and pathway of γ-subunit rotation in FoF1-ATP synthase." Proceedings of the National Academy of Sciences 112, no. 34 (August 10, 2015): 10720–25. http://dx.doi.org/10.1073/pnas.1500691112.

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We combine molecular simulations and mechanical modeling to explore the mechanism of energy conversion in the coupled rotary motors of FoF1-ATP synthase. A torsional viscoelastic model with frictional dissipation quantitatively reproduces the dynamics and energetics seen in atomistic molecular dynamics simulations of torque-driven γ-subunit rotation in the F1-ATPase rotary motor. The torsional elastic coefficients determined from the simulations agree with results from independent single-molecule experiments probing different segments of the γ-subunit, which resolves a long-lasting controversy. At steady rotational speeds of ∼1 kHz corresponding to experimental turnover, the calculated frictional dissipation of less than kBT per rotation is consistent with the high thermodynamic efficiency of the fully reversible motor. Without load, the maximum rotational speed during transitions between dwells is reached at ∼1 MHz. Energetic constraints dictate a unique pathway for the coupled rotations of the Fo and F1 rotary motors in ATP synthase, and explain the need for the finer stepping of the F1 motor in the mammalian system, as seen in recent experiments. Compensating for incommensurate eightfold and threefold rotational symmetries in Fo and F1, respectively, a significant fraction of the external mechanical work is transiently stored as elastic energy in the γ-subunit. The general framework developed here should be applicable to other molecular machines.
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Penner, Glenn H., Baiyi Zhao, and Kenneth R. Jeffrey. "Molecular Dynamics in the Solid Trimethylamine-Borane Complex: A Deuterium NMR Study." Zeitschrift für Naturforschung A 50, no. 1 (January 1, 1995): 81–89. http://dx.doi.org/10.1515/zna-1995-0111.

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Abstract The molecular dynamics of solid (CH3)3NBH3 is investigated by deuterium NMR spectroscopy. Variable temperature lineshape analyses yield activation energies of 27 ± 3, 19 ± 2, and 12.5 ± 2 kJ/mol for -CH3, -N(CH3)3 and -BH3 rotation, respectively. Analysis of the temperature depen­ dence of the spin-lattice relaxation times, T1 , gives activation energies of 33 ± 3, 15 ± 1.5, and 14 ± 1.5 kJ/mol, respectively. Direct comparison of rotational exchange rates (from lineshape simu­ lations) an of rotational correlation times (from T1 analyses) for -N(CH3)3 and -BH3 rotation indicate that the two motions are correlated in solid (CH3)3NBH3 and together constitute a whole molecule reorientation about the N-B bond. This is supported by an internal rotational barrier of 18.0 kJ/mol for-BH3 rotation, obtained from ab initio molecular orbital calculations at the MP2/6-31G* level.
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Dissertations / Theses on the topic "Molecular rotation"

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Bloomquist, Casey. "Detection and characterization of unidirectional molecular rotation." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43141.

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The main goal of this work is the detection of the directionality of molecular rotation and the characterization of two experimental approaches to controlling the directionality of molecular rotation with ultrashort pulses. Control of the directionality of molecular rotation is desired in order to learn more about the internal properties of molecular systems as well as for studying and controlling molecular interactions. Further, the techniques for generating unidirectional molecular rotation must be studied to understand the properties of the molecular ensembles that are generated. In order to detect the directionality of molecular rotation, we use circular polarization sensitive resonance-enhanced multiphoton ionization spectroscopy to allow state-selective directionality detection. In this work we explain this technique and demonstrate its ability to measure the directionality of individual rotational states. The two methods for controlling the directionality of molecular rotation are based on the molecular interaction with either a pair of pulses (a “double-kick” scheme) or a larger sequence of pulses (a “chiral pulse train” scheme). In both cases, rotational control is achieved by varying the polarization of and the time delay between consecutive laser pulses. The double-kick and chiral train methods have demonstrated the ability to control the directionality of molecular rotation but have not been extensively studied. In this work, we perform experiments with both the double-kick and chiral train techniques for thorough comparison and characterization of both methods. We show that both methods produce significant rotational directionality. We also demonstrate that increasing the number of excitation pulses enables one to control the sense of molecular rotation and predominately excite a single rotational state, i.e. quantum state selectivity. To further explore the capabilities of both techniques we perform experiments on selectivity in mixtures of spin isomers and molecular isotoplogues. We demonstrate the ability of both techniques to generate counter-rotation of molecular nuclear spin isomers (here, ortho- and para-nitrogen) and molecular isotopologues.
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Aston, Georgina Margaret. "Molecular dynamics with muon spin relaxation/rotation." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338062.

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Johnson, Mark R. "Molecular rotation and the quantum-classical transition." Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334785.

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Newton, Tony Christopher. "Low temperature rotation in small molecular groups." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280102.

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Qi, Fei. "Light-driven molecular rotary motors." HKBU Institutional Repository, 2017. https://repository.hkbu.edu.hk/etd_oa/434.

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In the past two decades, a number of artificial molecular motors have been constructed using organic molecules as components which can perform unidirectional motion. Among the best-known examples are the light-activated molecular rotary motors synthesized and analyzed in B. L. Feringa's lab. Yet there is limited understanding of the photoisomerization and thermal isomerization processes that control the speed and energy conversion efficiency of these molecular devices. The present thesis work aims at: 1) developing a computational methodology to provide the atomic and electronic details that allow for quantitative descriptions of light-activated molecular motion, 2) improving the understanding of the physical principles governing photo- and thermal-isomerization processes in specific molecular systems, and 3) proposing a new strategy of molecule design to assist experimental investigations. A key component in our methodology is the calculation of the potential energy surface (PES) spanned by collective atomic coordinates using ab initio quantum mechanical methods. This is done both for the electronic ground state, which is relatively straightforward, and for the photo-excited state, which is more involved. Once the PES is known, classical statistical mechanical methods can be used to analyze the dynamics of the slow variables from which information about the rotational motion can be extracted. Calculation of the PES is computationally expensive if one were to sample the very high dimensional space of the atomic coordinates. A new method, based on the torque experienced by individual atoms, is developed to capture key aspects of the intramolecular relaxation in terms of angular variables associated with the rotational degrees of freedom. The effectiveness of the approach is tested on specific light-driven molecular rotary motors that were successfully synthesized and analyzed in previous experiments. Finally, based on the experience accumulated in this study, a new molecular rotary motor driven by visible light is proposed to reach MHz rotational frequency.
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Gurusinghe, Ranil Malaka. "Methyl Internal Rotation Probed by Rotational Spectroscopy." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1476282624055414.

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Rhee, Won Myung. "A Comprehensive Model for the Rotational Spectra of Propyne CH₃CCH in the Ground and V₁₀=1,2,3,4,5 Vibrational States." Thesis, North Texas State University, 1986. https://digital.library.unt.edu/ark:/67531/metadc332026/.

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The energy states of C₃ᵥ symmetric top polyatomic molecules were studied. Both classical and quantum mechanical methods have been used to introduce the energy states of polyatomic molecules. Also, it is shown that the vibration-rotation spectra of polyatomic molecules in the ground and excited vibrational states can be predicted by group theory. A comprehensive model for predicting rotational frequency components in various v₁₀ vibrational levels of propyne was developed by using perturbation theory and those results were compared with other formulas for C₃ᵥ symmetric top molecules. The v₁₀=1,2,3 and ground rotational spectra of propyne in the frequency range 17-70 GHz have been reassigned by using the derived comprehensive model. The v₁₀=3 and v₁₀=4 rotational spectra of propyne have been investigated in the 70 GHz, and 17 to 52 GHz regions, respectively, and these spectral components assigned using the comprehensive model. Molecular constants for these vibrationally excited states have been determined from more than 100 observed rotational transitions. From these experimentally observed components and a model based upon first principles for C₃ᵥ symmetry molecules, rotational constants have been expressed in a form which enables one to predict rotational components for vibrational levels for propyne up to v₁₀=5. This comprehensive model also appears to be useful in predicting rotational components in more highly excited vibrational levels but data were not available for comparison with the theory. Several techniques of assignment of rotational spectra for each excited vibrational state are discussed. To get good agreement between theory and experiment, an additional term 0.762(J+1) needed to be added to Kℓ=1 states in v₁₀=3. No satisfactory theoretical explanation of this term has been found. Experimentally measured frequencies for rotational components for J→(J+1)=+1 (0≤J≤3) in each vibration v₁₀=n (0≤n≤4) are presented and compared with those calculated using the results of basic perturbation theory. The v₉=2 rotational spectrum of the propyne molecule was introduced in Appendix A to compare the rotational spectra of the same molecule in different vibrational levels v₉ and v₁₀.
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Korobenko, Aleksey. "Control of molecular rotation with an optical centrifuge." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58640.

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The major purpose of this work is the experimental study of the applicability of an optical centrifuge - a novel tool, utilizing non-resonant broadband laser radiation to excite molecular rotation - to produce and control molecules in extremely high rotational states, so called molecular "super rotors", and to study their optical, magnetic, acoustic, hydrodynamic and quantum mechanical properties.
Science, Faculty of
Physics and Astronomy, Department of
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Debenham, Peter Mark. "Molecular rotation in the quantum and classical regions." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284053.

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Holland, James K. "High resolution vibration rotation spectrum of fluoroacetylene." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280472.

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Books on the topic "Molecular rotation"

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Kroto, H. W. Molecular rotation spectra. Mineola, N.Y: Dover Publications, 2003.

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Kroto, H. W. Molecular rotation spectra. New York: Dover, 1992.

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Schmiedt, Hanno. Molecular Symmetry, Super-Rotation, and Semiclassical Motion. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66071-4.

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Burshteĭn, A. I. Spectroscopy of molecular rotation in gases and liquids. Cambridge, Eng: Cambridge University Press, 1994.

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Wigg, Alison. Molecular orbital studies of large molecules: Internal rotation in the monofluorobenaldehydes. Salford: University of Salford, 1989.

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Jean-Pierre, Sauvage, and Amendola V, eds. Molecular machines and motors. Berlin: Springer, 2001.

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Zhilinskiĭ, B. I. Teorii͡a︡ slozhnykh molekurli͡a︡rnykh spektrov. Moskva: Izd-vo Moskovskogo universiteta, 1989.

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Tipping, R. H. The vibration-rotational spectroscopy of diatomic molecules. London: Academic, 1987.

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Larsson, Kilian. Stark effect for a linear rigid polar rotator treated by means of a general phase-integral method. Uppsala: Uppsala University, 1987.

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Ogilvie, J. F. The vibrational and rotational spectrometry of diatomic molecules. San Diego: Academic Press, 1998.

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Book chapters on the topic "Molecular rotation"

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Schmiedt, Hanno. "Ultrafast Rotation." In Molecular Symmetry, Super-Rotation, and Semiclassical Motion, 127–47. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66071-4_11.

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Fleischer, Sharly, I. Sh Averbukh, and Yehiam Prior. "Field-free unidirectional molecular rotation." In Springer Series in Chemical Physics, 75–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-95946-5_25.

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McClain, William Martin. "Euler rotation matrices." In Symmetry Theory in Molecular Physics with Mathematica, 137–47. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/b13137_11.

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Inoue, Yuichi. "Rotation Measurements of Tethered Cells." In Methods in Molecular Biology, 163–74. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-6927-2_12.

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Fornés, José Antonio. "Rotation of a Dipole." In Principles of Brownian and Molecular Motors, 65–80. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64957-9_5.

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Schmiedt, Hanno. "The Molecular Super-Rotor." In Molecular Symmetry, Super-Rotation, and Semiclassical Motion, 87–94. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66071-4_7.

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Nielsen, Jens H., Dominik Pentlehner, Lars Christiansen, Benjamin Shepperson, Anders A. Søndergaard, Adam S. Chatterley, James D. Pickering, et al. "Laser-Induced Alignment of Molecules in Helium Nanodroplets." In Topics in Applied Physics, 381–445. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94896-2_9.

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AbstractModerately intense, nonresonant laser pulses can be used to accurately control how gas phase molecules are oriented in space. This topic, driven by intense experimental and theoretical efforts, has been ever growing and developed for more than 20 years, and laser-induced alignment methods are used routinely in a number of applications in physics and chemistry. Starting in 2013, we have demonstrated that laser-induced alignment also applies to molecules dissolved in helium nanodroplets. Here we present an overview of this new work discussing alignment in both the nonadiabatic (short-pulse) and adiabatic (long-pulse) limit. We show how femtosecond or picosecond pulses can set molecules into coherent rotation that lasts for a long time and reflects the rotational structure of the helium-solvated molecules, provided the pulses are weak or, conversely, results in desolvation of the molecules when the pulses are strong. For long pulses we show that the 0.4 K temperature of the droplets, shared with the molecules or molecular complexes, leads to exceptionally high degrees of alignment. Upon rapid truncation of the laser pulse, the strong alignment can be made effectively field-free, lasting for about 10 ps thanks to slowing of molecular rotation by the helium environment. Finally, we discuss how the combination of strongly aligned molecular dimers and laser-induced Coulomb explosion imaging enables determination of the structure of the dimers. As a background and reference point, the first third of the article introduces some of the central concepts of laser-induced alignment for isolated molecules, illustrated by numerical and experimental examples.
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Milner, Valery, and John W. Hepburn. "Laser Control of Ultrafast Molecular Rotation." In Advances in Chemical Physics Volume 159, 395–412. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2016. http://dx.doi.org/10.1002/9781119096276.ch10.

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Hong, Jin-Long. "Enhanced Emission by Restriction of Molecular Rotation." In Aggregation-Induced Emission: Fundamentals, 285–305. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch13.

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Ruggeri, Tommaso, and Masaru Sugiyama. "Many Moments with Molecular Rotation and Vibration." In Classical and Relativistic Rational Extended Thermodynamics of Gases, 295–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59144-1_11.

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Conference papers on the topic "Molecular rotation"

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Schlemmer, Stephan, Jürgen Gauss, Filippo Lipparini, Michael Harding, Ad van der Avoird, Igor Savic, Dieter Gerlich, Oskar Asvany, and Thomas Salomon. "MOLECULAR ROTATION IN FLOPPY MOLECULES: HE-H3+." In 2020 International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2020. http://dx.doi.org/10.15278/isms.2020.tg08.

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Grabow, Jens-Uwe. "MOLECULAR ROTATION SIGNALS: MOLECULE CHEMISTRY AND PARTICLE PHYSICS." In 70th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2015. http://dx.doi.org/10.15278/isms.2015.ma02.

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Hosseinnia, Ali, Meena Raveesh, Armand Dominguez, Maria Ruchkina, and Joakim Bood. "Femtosecond rotational CARS with quantum control of molecular rotation." In Laser Applications to Chemical, Security and Environmental Analysis. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/lacsea.2022.lm2b.2.

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Quantum control is implemented in a 2-beam fs/ns rotational CARS setup via a second control pulse with variable delay. The potential of the concept for improved diagnostics is demonstrated by species-selective enhancement/annihilation via field-free alignment.
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Tutunnikov, Ilia, Emilien Prost, Uri Steinitz, Pierre Béjot, Edouard Hertz, Franck Billard, Olivier Faucher, and Ilya Sh Averbukh. "Visualizing Coherent Molecular Rotation in a Gaseous Medium [1, 2]." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/up.2022.tu4a.33.

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We present a study of a non-intrusive optical scheme for visualizing the rotational dynamics in an anisotropic molecular gas. The proposed optical method is promising for visualizing the rotations of symmetric- and asymmetric-top molecules.
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Gougoula, Eva, Nick Walker, Juliane Heitkﾊmper, and Chris Medcraft. "BARRIERS TO INTERNAL ROTATION IN STRUCTURAL ISOMERS OF METHYLIMIDAZOLE DETERMINED BY BROADBAND ROTATIONAL SPECTROSCOPY." In 74th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2019. http://dx.doi.org/10.15278/isms.2019.mi01.

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Baba, Masaaki, Jon Hougen, and Masatoshi Misono. "CH3 INTERNAL ROTATION IN 9-METHYLANTHRACENE." In 74th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2019. http://dx.doi.org/10.15278/isms.2019.mi08.

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Wirth, Mary J., Shiow-Hwa, and John Burbage. "Molecular rotation in organized media: surface monolayers, liquid crystals and micelles." In Laser Applications to Chemical Analysis. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/laca.1990.wb2.

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Molecular rotation in ordinary liquids is generally understood, albeit imperfectly. However, molecular rotation in more complicated and intriguing media, such as surface monolayers, liquid crystals and organized surfactants, is less understood. These media are structured, thus affecting the way a solute rotates. To study molecular rotation, the correlation of the orientations of 2 transition dipoles of a solute is measured as a function of time. The results are interpreted using the spherical harmonics to describe the decay of the correlation function. The keys to describing rotation in complicated media are 1) highly quantitative and sensitive measurements of the rotational correlation function and 2) development of mathematical models to describe hindered rotation. In this paper, the rotational behavior of solute probes in bonded chromatographic phases, micelles and liquid crystals is described and contrasted with rotational behavior in ordinary liquids.
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Novick, Stewart, S. Cooke, Peter Groner, Wallace Pringle, Susanna Stephens, and W. Orellana. "TORSIONAL SPLITTING AND FOUR-FOLD BARRIER TO INTERNAL ROTATION: THE ROTATIONAL SPECTRA OF VINYLSULFUR PENTAFLUORIDE." In 73rd International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2018. http://dx.doi.org/10.15278/isms.2018.tk10.

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Vandendriessche, Stefaan, Ward Brullot, and Thierry Verbiest. "Switching Faraday rotation on a molecular level." In SPIE Photonics Europe, edited by Benjamin J. Eggleton, Alexander L. Gaeta, and Neil G. Broderick. SPIE, 2012. http://dx.doi.org/10.1117/12.921856.

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Kreglewski, Marek. "FLOPPY MOLECULES WITH INTERNAL ROTATION AND INVERSION." In 71st International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2016. http://dx.doi.org/10.15278/isms.2016.ta01.

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Reports on the topic "Molecular rotation"

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Jelinek, Raz. Double rotation NMR studies of zeolites and aluminophosphate molecular sieves. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/10125116.

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Clabo, D. A. Jr. Systematic studies of molecular vibrational anharmonicity and vibration-rotation interaction by self-consistent-field higher derivative methods: Applications to asymmetric and symmetric top and linear polyatomic molecules. Office of Scientific and Technical Information (OSTI), April 1987. http://dx.doi.org/10.2172/6117857.

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Dyke, Thomas R. Rotational and Vibrational Spectra of Molecular Clusters. Fort Belvoir, VA: Defense Technical Information Center, June 1986. http://dx.doi.org/10.21236/ada173012.

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Wu, Qihua, Kathryn Kremer, Stephen Gibbons, and Alan Kennedy. Determination of nanomaterial viscosity and rheology properties using a rotational rheometer. Engineer Research and Development Center (U.S.), April 2022. http://dx.doi.org/10.21079/11681/43964.

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Rheology studies the flow of matter and is one of the most important methods for materials characterization because flow behavior is responsive to properties such as molecular weight and molecular weight distribution. Rheological properties help practitioners understand fluid flow and how to improve manufacturing processes. Rheometers have been extensively used to determine the viscosity and rheological properties of different materials because the measurements are quick, accurate, and reliable. In this standard operating procedure, a general protocol using a rotational rheometer is developed for characterizing rheological properties of nanomaterials. Procedures and recommendations for sample preparation, instrument preparation, sample measurements, and results analysis are included. The procedure was tested on a variety of carbon-based nanomaterials.
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Simons, Jack. Modified Rotationally Adiabatic Model for Rotational Autoionization of Dipole-Bound Molecular Anions. Fort Belvoir, VA: Defense Technical Information Center, June 1989. http://dx.doi.org/10.21236/ada209851.

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Davis, Steven J. Rotational Energy Transfer in Metastable States of Heteronuclear Molecules. Fort Belvoir, VA: Defense Technical Information Center, January 1989. http://dx.doi.org/10.21236/ada226768.

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Morgen, Michael Mark. Femtosecond Raman induced polarization spectroscopy studies of coherent rotational dynamics in molecular fluids. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/501549.

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David R. Farley. Calculation of Ground State Rotational Populations for Kinetic Gas Homonuclear Diatomic Molecules including Electron-Impact Excitation and Wall Collisions. Office of Scientific and Technical Information (OSTI), August 2010. http://dx.doi.org/10.2172/988881.

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Herbert, John M. Symbolic derivation of high-order Rayleigh-Schroedinger perturbation energies using computer algebra: Application to vibrational-rotational analysis of diatomic molecules. Office of Scientific and Technical Information (OSTI), January 1997. http://dx.doi.org/10.2172/491448.

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Field, Robert W. Metastable Electronically Excited Atoms and Molecules: Excitation Transfer in Slow Collisions, Probed by Means of a Counter-Rotating Supersonic Jet. Fort Belvoir, VA: Defense Technical Information Center, August 2012. http://dx.doi.org/10.21236/ada582459.

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