Výsledky vyhledávání - "Judy Y.-C. Chen"

Paramagnet Enhanced Nuclear Spin Relaxation in H2O@Open-C60 and H2@Open-C60

Autor: Judy Y.-C. Chen, Nicholas J. Turro, Ronald G. Lawler, Yasujiro Murata, Xuegong Lei, Yongjun Li

Publikováno v: Organic Letters. 15:4746-4749

Relaxation rates of endo-H2O in H2O@Open-C60 in the presence of a nitroxide radical and of their nitroxide derivatives have been measured and are compared with effects for endo-H2 in similar cages. T1 relaxation enhancement of the endo-H2O and H2 ind

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1041c409a7590bc91e9b2538b75dc3c1
https://doi.org/10.1021/ol402111x

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Nuclear Magnetic Resonance of Hydrogen Molecules Trapped inside C70 Fullerene Cages

Autor: Xuegong Lei, Ilya Kuprov, Judy Y.-C. Chen, Ivo Heinmaa, Salvatore Mamone, Mark Denning, Marina Carravetta, Yasujiro Murata, Maria Concistrè, Malcolm H. Levitt, Nicholas J. Turro, Yongjun Li, Gary Wall

Publikováno v: Chemphyschem

We present a solid-state NMR study of H2 molecules confined inside the cavity of C70 fullerene cages over a wide range of temperatures (300 K to 4 K). The proton NMR spectra are consistent with a model in which the dipole-dipole coupling between the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9de1f347e6781a38311bf147c59be7cb
http://europepmc.org/articles/PMC4068279

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Quantum rotation of ortho and para -water encapsulated in a fullerene cage

Publikováno v: Proceedings of the National Academy of Sciences. 109:12894-12898

Inelastic neutron scattering, far-infrared spectroscopy, and cryogenic nuclear magnetic resonance are used to investigate the quantized rotation and ortho–para conversion of single water molecules trapped inside closed fullerene cages. The existenc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::926cee06937c39b6fc335f2c8f01ab14
https://doi.org/10.1073/pnas.1210790109

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Comparison of Nuclear Spin Relaxation of H2O@C60 and H2@C60 and Their Nitroxide Derivatives

Autor: Yongjun Li, Ronald G. Lawler, Judy Y.-C. Chen, Xuegong Lei, Yasujiro Murata, Koichi Komatsu, Nicholas J. Turro

Publikováno v: The Journal of Physical Chemistry Letters. 3:1165-1168

The successful synthesis of H2O@C60 makes possible the study of magnetic interactions of an isolated water molecule in a geometrically well-defined hydrophobic environment. Comparisons are made between the T1 values of H2O@C60 and the previously stud

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad73c5e85f24181d0a6dcc9d2b9d5c3d
https://doi.org/10.1021/jz3002794

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A Photochemical On–Off Switch for Tuning the Equilibrium Mixture of H2 Nuclear Spin Isomers as a Function of Temperature

Autor: Nicholas J. Turro, Koichi Komatsu, Michael Frunzi, Rafael M. Krick Calderon, Ronald G. Lawler, Xuegong Lei, Judy Y.-C. Chen, Dirk M. Guldi, Steffen Jockusch, Yasujiro Murata

Publikováno v: Journal of the American Chemical Society. 133:14232-14235

The photochemical interconversion of the two allotropes of the hydrogen molecule [para-H(2) (pH(2)) and ortho-H(2) (oH(2))] incarcerated inside the fullerene C(70) (pH(2)@C(70) and oH(2)@C(70), respectively) is reported. Photoexcitation of H(2)@C(70)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfb78b9c24cb8cc08b291f30007cacf8
https://doi.org/10.1021/ja206383n

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Theory and spectroscopy of an incarcerated quantum rotor: The infrared spectroscopy, inelastic neutron scattering and nuclear magnetic resonance of H2@C60 at cryogenic temperature

Autor: Salvatore Mamone, Judy Y.-C. Chen, Ronald G. Lawler, Zlatko Bačić, Rangeet Bhattacharyya, Anthony J. Horsewill, Malcolm H. Levitt, Toomas Rõõm, Nicholas J. Turro

Publikováno v: Coordination Chemistry Reviews. 255:938-948

The supramolecular complex, H2@C60, represents a model of a quantum rotor in a nearly spherical box. In providing a real example of a quantum particle entrapped in a small space, the system cuts to the heart of many important and fundamental quantum

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5c048174aa69a3af5ff8b7bf65a6f52
https://doi.org/10.1016/j.ccr.2010.12.029

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Comparative NMR Properties of H2 and HD in Toluene-d8 and in H2/HD@C60

Autor: Koichi Komatsu, Angel A. Martí, Ronald G. Lawler, Yasujiro Murata, Nicholas J. Turro, Judy Y.-C. Chen

Publikováno v: The Journal of Physical Chemistry B. 114:14689-14695

Spin-lattice relaxation times, T(1), have been measured from 200-340 K for the protons in H(2) and HD molecules dissolved in toluene-d(8) and incarcerated in C(60). It is found that HD relaxes more slowly than H(2) in both environments and at all tem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a4820874eec32e66d9521c66e0a26cf
https://doi.org/10.1021/jp102860m

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The Spin Chemistry and Magnetic Resonance of H2@C60. From the Pauli Principle to Trapping a Long Lived Nuclear Excited Spin State inside a Buckyball

Autor: Elena Sartori, Steffen Jockusch, Juan López-Gejo, Ronald G. Lawler, Angel A. Martí, Koichi Komatsu, Yasujiro Murata, Judy Y.-C. Chen, Nicholas J. Turro, Marco Ruzzi

Publikováno v: Accounts of Chemical Research. 43:335-345

One of the early triumphs of quantum mechanics was Heisenberg's prediction, based on the Pauli principle and wave function symmetry arguments, that the simplest molecule, H(2), should exist as two distinct species-allotropes of elemental hydrogen. On

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b129817d51dfbc42f23d521a87d8c0ea
https://doi.org/10.1021/ar900223d

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Mechanism for Oxygen-Enhanced Photoconductivity in Rubrene: Electron Transfer Doping▽This publication involves research sponsored by the U.S. Department of Energy under grant no. DE FG02-04ER 46118 and Columbia University

Autor: Ashok Maliakal, Arthur P. Ramirez, Judy Y.-C. Chen, Steffen Jockusch, Colin Nuckolls, Bumjung Kim, Alberto Modelli, Maria Francesca Ottaviani, Nicholas J. Turro, Woo-Young So

Publikováno v: Chemistry of Materials. 21:5519-5526

The oxygen-enhanced photoconductivity observed in crystalline rubrene is investigated using electron paramagnetic resonance (EPR) spectroscopy and steady-state and time dependent photoconductivity (PC) measurements. The EPR data indicate the presence

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9a4e8a8de598aae8baac8014ba061477
https://doi.org/10.1021/cm902699s

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