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Academic literature on the topic 'Weakly Bound Molecules'

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Published: 7 September 2023

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Journal articles on the topic "Weakly Bound Molecules"

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Kolganova, E. A., and V. Roudnev. "Weakly Bound Triatomic LiHe2 Molecules." Bulletin of the Russian Academy of Sciences: Physics 84, no. 4 (April 2020): 465–68. http://dx.doi.org/10.3103/s1062873820040140.

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Gou, Bingcong, and Fei Wang. "Weakly bound triatomic4He23He and3He24He molecules." International Journal of Quantum Chemistry 101, no. 2 (2004): 169–73. http://dx.doi.org/10.1002/qua.20202.

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Yuan, Jianmin, and C. D. Lin. "Weakly bound triatomic He2Li and He2Na molecules." Journal of Physics B: Atomic, Molecular and Optical Physics 31, no. 15 (August 14, 1998): L637—L645. http://dx.doi.org/10.1088/0953-4075/31/15/001.

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Borkowski, Mateusz. "Optical clock spectroscopy in weakly bound molecules." Journal of Physics: Conference Series 1289 (July 2019): 012002. http://dx.doi.org/10.1088/1742-6596/1289/1/012002.

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Certain, Phillip R., and Nimrod Moiseyev. "Weakly bound, strongly anisotropic van der Waals molecules." Journal of Physical Chemistry 89, no. 14 (July 1985): 2974–75. http://dx.doi.org/10.1021/j100260a003.

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Shegelski, Mark R. A., George Jones, Caleb Sample, Mitchell Hawse, and Matthew Reid. "Resonant transmission of weakly bound multi-atomic molecules." Journal of Physics B: Atomic, Molecular and Optical Physics 52, no. 5 (February 6, 2019): 055201. http://dx.doi.org/10.1088/1361-6455/aafa4a.

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Cui, Shuxun, Christian Albrecht, Ferdinand Kühner, and Hermann E. Gaub. "Weakly Bound Water Molecules Shorten Single-Stranded DNA." Journal of the American Chemical Society 128, no. 20 (May 2006): 6636–39. http://dx.doi.org/10.1021/ja0582298.

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Fedorov, D. V., J. R. Armstrong, N. T. Zinner, and A. S. Jensen. "Weakly Bound States of Polar Molecules in Bilayers." Few-Body Systems 50, no. 1-4 (January 2, 2011): 395–97. http://dx.doi.org/10.1007/s00601-010-0199-0.

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Kłos, Jacek, Hui Li, Eite Tiesinga, and Svetlana Kotochigova. "Prospects for assembling ultracold radioactive molecules from laser-cooled atoms." New Journal of Physics 24, no. 2 (February 1, 2022): 025005. http://dx.doi.org/10.1088/1367-2630/ac50ea.

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Abstract Molecules with unstable isotopes often contain heavy and deformed nuclei and thus possess a high sensitivity to parity-violating effects, such as the Schiff moments. Currently the best limits on Schiff moments are set with diamagnetic atoms. Polar molecules with quantum-enhanced sensing capabilities, however, can offer better sensitivity. In this work, we consider the prototypical 223Fr107Ag molecule, as the octupole deformation of the unstable 223Fr francium nucleus amplifies the nuclear Schiff moment of the molecule by two orders of magnitude relative to that of spherical nuclei and as the silver atom has a large electron affinity. To develop a competitive experimental platform based on molecular quantum systems, 223Fr atoms and 107Ag atoms have to be brought together at ultracold temperatures. That is, we explore the prospects of forming 223Fr107Ag from laser-cooled Fr and Ag atoms. We have performed fully relativistic electronic-structure calculations of ground and excited states of FrAg that account for the strong spin-dependent relativistic effects of Fr and the strong ionic bond to Ag. In addition, we predict the nearest-neighbor densities of magnetic-field Feshbach resonances in ultracold 223Fr + 107Ag collisions with coupled-channel calculations. These resonances can be used for magneto-association into ultracold, weakly-bound FrAg. We also determine the conditions for creating 223Fr107Ag molecules in their absolute ground state from these weakly-bound dimers via stimulated Raman adiabatic passage using our calculations of the relativistic transition electric dipole moments.
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Reisler, Hanna. "Photofragment Spectroscopy and Predissociation Dynamics of Weakly Bound Molecules." Annual Review of Physical Chemistry 60, no. 1 (May 2009): 39–59. http://dx.doi.org/10.1146/annurev.physchem.040808.090441.

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Dissertations / Theses on the topic "Weakly Bound Molecules"

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Brown, D. F. R. "Quantum simulations of weakly bound molecules." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597004.

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This thesis is concerned with the computational simulation of weakly bound molecules. Two general methods of producing potential energy surfaces, Neural Networks and Gaussian processes, are described and evaluated. The Neural Network method is used to generate potential functions for HF-HCI, H2-HF and H2-HCI from good quality ab initio data. These surfaces are used by the diffusion Monte Carlo algorithm to solve the vibrational Schrödinger equation for the ground state of the above clusters. In addition, the DMC method is used in a size selective study of the N+2-Hen system. Good agreement is obtained with previous theoretical calculations and with the small amount of experimental data available and it is hoped that the predictions made will aid future studies of these clusters. The combined ab initio-Neural-DMC approach is shown to be an efficient method of studying weakly bound molecules and as such will prove to be a useful step towards understanding the structure and bonding of these systems.
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Krause, Paul James. "Vibrational predissociation in weakly bound molecules." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313784.

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Ridinger, Armin. "Towards quantum degenerate Fermi mixtures : photoassociation of weakly bound 6Li40K molecules." Phd thesis, Ecole Normale Supérieure de Paris - ENS Paris, 2011. http://tel.archives-ouvertes.fr/tel-00613211.

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Mon projet de thèse a eu pour objectif la construction d'un dispositif expérimental visant à étudier, à très basse température, un mélange de gaz dégénéré composé de deux espèces fermioniques: 6Li et 40K. Une description détaillée du montage de sa mise en place ainsi qu'une caractérisation du dispositif sont présentées. Nous avons réalisé un piège magnéto-optique à deux espèces avec un très grand nombre d'atomes, et un transport magnétique sur une grande distance. Les premières expériences avec le mélange atomique ont permis la première création de molécules hétéronucléaires excitées 6Li40K* par photoassociation. Nous avons enregistré et assigné des spectres de photoassociation pour les états les plus faiblement liés de sept potentiels moléculaires et nous en avons déduit la forme des potentiels à longues distances. Nos résultats ouvrent la voie vers la formation de molécules bosoniques 6Li40K ultra-froides dans leur état fondamental, caractérisé par un grand moment dipolaire électrique permanent. Sur le plan théorique, nous avons développé une nouvelle méthode pour la manipulation des particules quantiques, qui pourrait être appliquée aux molécules 6Li40K. Cette méthode consiste à piéger les particules dans un potentiel oscillant rapidement et induire un changement instantané de phase du potentiel (un saut de phase). Nous montrons que le mouvement moyen des particules peut ainsi être manipulé de manière contrôlée. La méthode proposée a trouvé une première application pour les condensats de Bose-Einstein piégés à l'aide d'un piège magnétique du type "TOP".
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Low, Russell John. "High resolution spectroscopy of weakly bound molecular complexes." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296861.

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Yarwood, Gregory. "The kinetics and spectroscopy of weakly bound species." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329223.

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Roehrig, Mark August. "Microwave measurements on transition metal and weakly bound molecular complexes." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186164.

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High resolution microwave spectra for the transition metal compounds cobalt tri-carbonyl nitrosyl (Co(CO)₃NO), cyclopentadienyl cobalt di-carbonyl (CpCo(CO)₂), and cyclopentadienyl manganese tri-carbonyl (CpMn(CO)₃) were obtained for the first time using pulsed beam Fourier transform spectroscopy. An oblate symmetric top spectrum was measured for Co(CO)₃NO and the first gas phase value of the cobalt nuclear quadrupole coupling parameter was obtained. The asymmetric top hindered rotor spectrum for CpCo(CO)₂ was measured and a barrier to internal rotation was estimated from the spectrum. Analysis of the prolate symmetric top hyperfine spectrum of CpMn(CO)₃ yielded the first gas phase measurement of the rotational constant and the Mn nuclear quadrupole coupling. High resolution microwave spectra for the iron containing transition metal complexes cyclobutadiene iron tri-carbonyl (CbFe(CO)₃), cyclohexadiene iron tri-carbonyl (C-hexFe(CO)₃) were obtained and a Kraitchman analysis of the isotopic substitution data for the butadiene iron tri-carbonyl (BuFe(CO)₃) is also discussed. Structural parameters for the HCCH-CO were obtained from the various isotopomers for this complex. An analysis of the distortion parameter D(J) yielded an estimation of the binding energy for this weakly bound complex. Analysis of spectra for nitrosyl chloride (NOCl) and chlorine tri-fluoride (ClF₃) yielded the first high resolution low J data sets for these molecules. The quadrupole coupling data are interpreted using the Townes-Dailey model for quadrupole coupling and an improved ground state structure for ClF₃ was obtained. Microwave spectra reported here were obtained using a pulsed beam Fourier transform microwave spectrometer constructed at the University of Arizona. The design is similar to original Flygare-Balle apparatus with many modifications for improving signal sensitivity and data acquisition.
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Goodwin, E. J. "An investigation of the rotational spectra of weakly bound complexes." Thesis, University of Exeter, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373819.

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Mannsfeld, Stefan. "Ordering in weakly bound molecular layers: organic-inorganic and organic-organic heteroepitaxy." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1098888571984-95956.

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It is an aim of this work to provide insight into the energetic influence on the ordering of molecular thin films on crystalline substrates. Here, the term substrate either refers to inorganic crystal surfaces or highly ordered layers of another organic molecular species. In order to calculate the total interface potential of extended molecular domains, a new calculation technique (GRID technique) is developed in the first part of this work. Compared to the standard approach, this method accelerates the potential calculation drastically (times 10000). The other parts of the thesis are dedicated to the comparison of experimental results (obtained by scanning tunneling microscopy and electron diffraction) to the optimal layer structure as predicted by optimization calculations. Potential calculations which are performed for the system perylenetetracarboxylicdianhydride (PTCDA) on graphite demonstrate that point-on-line coincident structures correspond to energetically favorable alignments of the molecular lattice with respect to the substrate lattice. The capability of the GRID technique to predict the optimal layer structure is demonstrated for the system peri-hexabenzocoronene (HBC) on graphite. The organic-organic heteroepitaxy system PTCDA on HBC on graphite is investigated in order to clarify to which extent the ordering mechanism there differs from that of the organic-inorganic heteroepitaxy system PTCDA on graphite. As a result of this investigation, a new type of epitaxy, i.e., substrate induced ordering is found. This new epitaxy type is governed by the inner structure of the substrate lattice unit cell. Here, the substrate surface is a layer of organic molecules itself, hence the substrate surface unit cell does indeed exhibit a complex inner structure. A generalized classification scheme for epitaxial growth incorporating this new type of epitaxy is proposed. In the last chapter, the structure of the first layers of titanylphthalocyanine (TiOPc) on Au(111) is investigated and compared to potential optimization calculations. The correspondence of experimental and theoretical results provides evidence that the GRID technique can, in principle, also be applied to molecular layers on metal surfaces
Das Ziel der vorliegenden Arbeit ist es, Einblicke in die energetischen Einflüsse, die zur Ausbildung der Schichtstruktur organischer Moleküle auf kristallinen Substraten führen, zu geben. Diese Substrate sind entweder Oberflächen anorganische Kristalle oder selbst hochgeordnete Molekülschichten. Um das totale Grenzflächenpotential ausgedehnter Moleküldomänen berechnen zu können, wird im ersten Teil der Arbeit eine neue Berechnungsmethode (GRID Technik) vorgestellt. Im Vergleich mit herkömmlichen Berechnungsmethoden auf der Basis molekülmechanischer Kraftfelder ist diese neue Methode daher um ein Vielfaches schneller (Faktor 100000). Die folgenden Teile der Arbeit sind dem Vergleich experimenteller Ergebnisse (Rastertunnelmikroskopie und Elektronenbeugung) mit, durch Potentialoptimierungsrechnungen als energetisch günstig vorhergesagten, Schichtstrukturen gewidmet. So kann für das System Perylentetracarbonsäuredianhydrid (PTCDA) auf Graphit mittels Potentialberechnungen nachgewiesen werden, daß die experimentell gefundenen ?Point-on-line koinzidenten? Strukturen energetisch günstige Anordnungen des Molekülgitters bezüglich des Substratgitters darstellen. Die Eignung der neuen Berechnungsmethode zur Vorhersage der günstigsten Adsorbatgitterstruktur für ein gegebenes System aus Molekül und Substrat, wird anhand des Systems peri-Hexabenzocoronen (HBC) auf Graphit demonstriert. Das organisch-organische Heteroepitaxiesystem PTCDA auf HBC auf Graphit wird untersucht, um zu klären, inwieweit sich die dafür gültigen Ordnungsmechanismen von denen unterscheiden, die für das Wachstum des organisch-anorganischen Heteroepitaxiesystems PTCDA auf Graphit verantwortlich sind. Dabei gelingt es, eine bisher nicht klassifizierte Art von Epitaxie, d.h. substratinduzierter Ordnung, nachzuweisen. Dieser neue Epitaxietyp ist bedingt durch die innere Struktur einer Substrateinheitszelle - das Substrat ist ja hier selbst eine Schicht geordneter Moleküle, die natürlich eine innere Struktur aufweisen. Im folgenden wird ein verallgemeinertes Klassifizierungssystem für Epitaxietypen abgeleitet, welches den neuen Epitaxietyp beinhaltet. Im letzten Kapitel wird die Struktur von der ersten Lagen von Titanylphthalocyanin (TiOPc) auf Au(111) experimentell untersucht und mit entsprechenden Potentialoptimierungsrechnungen verglichen. Die Übereinstimmung von experimentellen und theoretischen Ergebnissen zeigt, daß die GRID Technik, zumindest prinzipiell, auch für Molekülschichten auf Metallsubstraten anwendbar ist
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López, José G. "Theoretical studies of the dynamics and spectroscopy of weakly bound systems." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1127220592.

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Thesis (Ph. D.)--Ohio State University, 2005.
Title from first page of PDF file. Document formatted into pages; contains xv, 99 p.; also includes graphics (some col.). Includes bibliographical references (p. 95-99). Available online via OhioLINK's ETD Center
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López, José G. "Theoretical studies of the dynamics and spectroscopy of weakly bound systems." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1127220592.

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Books on the topic "Weakly Bound Molecules"

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NATO Advanced Research Workshop on Structure and Dynamics of Weakly Bound Molecular Complexes (1986 Acquafredda di Maratea, Italy). Structure and dynamics of weakly bound molecular complexes. Dordrecht: D. Reidel Pub. Co., 1987.

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Weber, Alfons, ed. Structure and Dynamics of Weakly Bound Molecular Complexes. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1.

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Weber, Alfons. Structure and Dynamics of Weakly Bound Molecular Complexes. Springer Netherlands, 2013.

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Weber, Alfons. Structure and Dynamics of Weakly Bound Molecular Complexes. Springer, 2012.

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Book chapters on the topic "Weakly Bound Molecules"

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Howard, Brian J. "High Resolution Infrared Spectroscopy of Van Der Waals Molecules." In Structure and Dynamics of Weakly Bound Molecular Complexes, 69–84. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_5.

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Levy, Donald H. "The Structure of Van Der Waals Molecules of S-Tetrazine." In Structure and Dynamics of Weakly Bound Molecular Complexes, 231–50. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_17.

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Gianturco, F. A., and M. Venanzi. "Transport Properties of Van Der Waals Molecules Computed from Accurate Interactions." In Structure and Dynamics of Weakly Bound Molecular Complexes, 389–404. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_27.

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Brocks, G., and A. Avoird. "Intermolecular Potentials, Internal Motions and the Spectra of Van Der Waals Molecules." In Structure and Dynamics of Weakly Bound Molecular Complexes, 337–55. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_24.

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Pine, A. S. "Vibrational Anomalies and Dynamic Coupling in Hydrogen-Bonded Van Der Waals Molecules." In Structure and Dynamics of Weakly Bound Molecular Complexes, 93–105. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_7.

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Gentry, W. Ronald. "Interpretation of Linewidths in the Infrared Photodissociation Spectra of Van Der Waals Molecules." In Structure and Dynamics of Weakly Bound Molecular Complexes, 467–75. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_32.

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Heppener, Marc, and Rudolf P. H. Rettschnick. "Dynamics of Energy Transfer in Van Der Waals Molecules of s-Tetrazine and Argon." In Structure and Dynamics of Weakly Bound Molecular Complexes, 553–62. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_40.

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Herpen, W. M., W. A. Majewski, D. W. Pratt, and W. L. Meerts. "Spectroscopy in the Visible and Near Ultraviolet Region of Some Organic Molecules and their Van Der Waals Complexes." In Structure and Dynamics of Weakly Bound Molecular Complexes, 279–90. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_20.

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Cline, Joseph I., Dwight D. Evard, Brian P. Reid, N. Sivakumar, Fritz Thommen, and Kenneth C. Janda. "Structure and Dynamics of the Rare Gas-Halogen Van Der Waals Molecules: Product State Distributions for Vibrational Predissociation of NeBr2." In Structure and Dynamics of Weakly Bound Molecular Complexes, 533–51. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3969-1_39.

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McKellar, A. R. W. "Infrared Spectra of Weakly-Bound Complexes and Collision-Induced Effects Involving Atmospheric Molecules." In Weakly Interacting Molecular Pairs: Unconventional Absorbers of Radiation in the Atmosphere, 223–32. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0025-3_19.

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Conference papers on the topic "Weakly Bound Molecules"

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Halberstadt, Nadine, J. Alberto Beswick, and Reinhard Schinke. "Rotation distributions in the vibrational predissociation of weakly bound complexes: Quasi-classical golden rule treatment." In Half collision resonance phenomena in molecules. AIP, 1991. http://dx.doi.org/10.1063/1.40560.

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Zinn, Sabrina, Melanie Schnell, Chris Medcraft, and Thomas Betz. "BROADBAND MICROWAVE SPECTROSCOPY AS A TOOL TO STUDY THE STRUCTURES OF ODORANT MOLECULES AND WEAKLY BOUND COMPLEXES IN THE GAS PHASE." In 70th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2015. http://dx.doi.org/10.15278/isms.2015.mg11.

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Xu, Yuanjian, Ali Shakouri, and Amnon Yariv. "Quantum Interference Effect and Electric Field Domains in Multiple Quantum Well Structures." In Semiconductor Lasers: Advanced Devices and Applications. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/slada.1995.tue.16.

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There has been great interest in studying optical and transport properties of multiple quantum well (MQW) structures. In these “artificial molecules”, energy quantization and the wave nature of the carriers have been used to design new devices, e.g., intersubband lasers. The understanding of carrier transport in MQWs is important for the design of lasers with high modulation speed. In this talk, we report on a new observation of a quantum interference effect in the photocurrent spectrum of weakly coupled bound-to-continuum MQWs. Using this effect, we analyze the electric field domain (EFD) formation in the superlattice [1].
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Barclay, A., Nasser Moazzen-Ahmadi, Andrea Pietropolli Charmet, and A. R. W. McKellar. "WEAKLY BOUND CLUSTERS OF ATMOSPHERIC MOLECULES: INFRARED SPECTRA AND STRUCTURAL CALCULATIONS OF (CO2)n-(CO)m-(N2)p, (n,m,p) = (2,1,0), (2,0,1), (1,2,0), (1,0,2), (1,1,1), (1,3,0), (1,0,3), (1,2,1), (1,1,2)." In 2022 International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2022. http://dx.doi.org/10.15278/isms.2022.wd06.

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Castleman, A. W., C. R. Albertoni, K. Marti, D. E. Hunton, and R. G. Keesee. "Photodissociation dynamics of cluster anions." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.fc7.

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Studies of the dissociation dynamics of cluster ions provide insight into the process of energy disposal for mass-selected species. Detailed investigations of the photodissociation of the cluster anions (SO2)2− and CO3−(H2O)n (0 ⩽ n ⩽ 3) have been accomplished for mass-selected ion species using an intracavity dye laser pumped with an argon-ion laser. In the case of CO3−, the unhydrated parent ion is observed to have a bound electronic excited state, through which absorption of a second photon proceeds to a repulsive state leading to the ejection of O−. There are two possible mechanisms for CO3− hydrate dissociation: one is a repulsive and the second a predissociative mechanism. In both, cluster dissociation is initiated by the same 2A1←2B1 transition from the ground to a weakly bound excited state of the core ion and leads to the loss of all water molecules within the time of observation. In the photodissociation of CO3−, CO3−(H2O)1,2,3, and (SO2)2− considerable excess energy is partitioned into relative translation of the photoproducts. Through studies of energy release in (SO2)2− with photons of parallel and perpendicular polarization, evidence has been obtained that the lifetime of the complex preceding photodissociation is less than a rotational period. The implications of the findings are discussed In terms of phase space theory.
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Castleman, A. Welford, C. R. Albertoni, K. Marti, D. E. Hunton, and R. G. Keesee. "Photodissociation dynamics of cluster anions." In International Laser Science Conference. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.jfc7.

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Studies of the dissociation dynamics of cluster ions provide insight into the process of energy disposal for mass-selected species. Detailed investigations of the photodissociation of the cluster anions ( SO 2 ) 2 − and CO 3 − ( H 2 O ) n ( 0 ≤ n ≤ 3 ) have been accomplished for mass-selected ion species using an intracavity dye laser pumped with an argon-ion laser. in the case of CO 3 − , the unhydrated parent ion is observed to have a bound electronic excited state through which absorption of a second photon proceeds to a repulsive state leading to the ejection of O-. There are two possible mechanisms for CO 3 - hydrate dissociation: one is a repulsive and the second a predissociative mechanism. In both, cluster dissociation is initiated by the same 2 A 1 ← 2 B 1 transition from the ground to a weakly bound excited state of the core ion and leads to the loss of all water molecules within the time of observation. In the photodissociation of CO 3 - , CO 3 - ( H 2 O ) 1 , 2 , 3 , and ( SO 2 ) 2 - considerable excess energy is partitioned into relative translation of the photoproducts. Through studies of energy release in ( SO 2 ) 2 - with photons of parallel and perpendicular polarization, evidence has been obtained that the lifetime of the complex preceding photodissociation is less than a rotational period. The implications of the findings are discussed in terms of phase space theory.
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Wittig, Curt. "Gas phase processes." In International Laser Science Conference. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.fa1.

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In condensed media, chemical reactions can be initiated with a great deal of geometric specificity, since the forces holding the molecules in place ensure that the reactants are aligned and oriented relative to one another. Unfortunately, the surrounding medium is in constant interaction with the reactive site and no signature characteristic of the eigenstates of isolated product species can be obtained. On the other hand, binary encounters in the gas phase are especially well suited for detecting nascent excitations. However, with isotropic samples the initial conditions are unbiased so that all angles and impact parameters are present. To exploit the virtues of each of these environments, we use weakly bound van der Waals-type complexes as precursors for studying elementary processes. A prototypical example is CO2 HBr, where the potential is minimum with the nuclei along a straight line. These complexes are prepared at 2K by supersonic expansion, and photodissociation of the HBr constituent propels the H-atom toward the CO2 with initial alignment, etc., determined mainly by zero-point fluctuations of the complex. Nascent products (e.g., OH, CO) can be detected by standard spectroscopic methods before collisions become troublesome. The technique can be used to peruse the system’s ability to avoid low energy channels (e.g., with an SCOHX precursor, can OH + CS be favored over SH + CO?), as well as provide stringent tests for different kinds of calculation.
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8

Beneckv, M. J., C. G. Kolvenbach, D. L. Amrani, and M. W. Mosesson. "EVIDENCE THAT THE C-TERMINAL HEPARIN BINDING DOMAIN ("HEP II") DOMINATES HEPARIN-FIBRONECTIN INTERACTIONS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643631.

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Abstract:
The interaction of glycosaminoglycans with plasma fibronectin (PFn) may play a role in the conversion of PFn from an “inert” dimeric circulating form to an “activated” multimeric form deposited on the cell surface or in the extracellular matrix. We carried out a quantitative comparison of heparin affinity for PFn and its proteolytic fragments in order to assess the relative importance of heparin interactions with PFn’s various reported heparin-binding domains. We employed affinity chromatography on PFn-sepharose to prepare a subset of fluorescein-labelled heparin molecules with high affinity for PFn, and confirmed that heparin binding to PFn is very sensitive to ionic strength. This suggests that the PFn-sepharose column selectively binds a fraction of highly sulfated heparin molecules. We quantified PFn-heparin affinity in the fluid-phase by monitoring a fluorescence polarization change that occurred as a consequence of the decrease in the rotational diffusion rate of fluorescently-labelled heparin molecules (13.8 kD) as they became “immobilized” by binding to PFn. Scatchard analysis of the heparin fluorescence polarization data obtained for PFn in Tris-buffered saline yielded a biphasic curve with Kd’s estimated at 5 and 130 nM, respectively A 190 kD thrombin fragment, containing the C-terminal "Hep II" domain but lacking the 29 kD N-terminal “Hep I” domain, yielded a linear plot displaying a single class of heparin-binding sites with a Kd of 130 nM Similar results were obtained for the C-terminal 150 kD Fn fragment which also contained the “Hep II” domain. In contrast, the 29 kD N-terminal “Hep I” Fn fragment bound heparin weakly (Kd =25 μM). The nature of the “high affinity (Kd= 5 nM) heparin binding component is uncertain; it may reflect heparin interaction with soluble multimers present in our PFn preparations Our observations suggest that the Kd=130 nM heparin binding component corresponds to heparin interaction with the C-terminal “Hep II” domain We conclude that the N-terminal “Hep I” domain does not participate significantly in heparin binding to soluble dimeric Fn under physiological conditions, whereas the C-terminal “Hep II” domain dominates such interactions
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9

Klemperer, William. "Spectroscopic Studies of Weakly Bound Molecular Complexes." In High Resolution Spectroscopy. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/hrs.1993.tua1.

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10

Zou, Luyao, and Susanna Widicus Weaver. "MILLIMETER/SUBMILLIMETER SPECTRA OF WEAKLY-BOUND CLUSTERS." In 71st International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2016. http://dx.doi.org/10.15278/isms.2016.rg14.

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Reports on the topic "Weakly Bound Molecules"

1

Alexander, Millard H. Theoretical Simulations of Weakly Bound Clusters of Light Atoms and Small Molecules. Fort Belvoir, VA: Defense Technical Information Center, February 2002. http://dx.doi.org/10.21236/ada399548.

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2

Muenter, J. S. Intermolecular potential functions and high resolution molecular spectroscopy of weakly bound complexes. Final progress report. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/471442.

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