Search results for "Terphenyl"
showing 10 items of 164 documents
Single-molecule optical switching of terrylene in p-terphenyl
1997
The controlled manipulation and switching of single atoms and molecules raise the prospect of ultra-high-density data storage. Switching by motion of a single atom has been reported1, and techniques of single-molecule optical detection and spectroscopy2 in the condensed phase have been refined to a degree that allows the modification of the absorption properties of a single chromophore3. Light-induced jumps in single-molecule excitation frequencies have been reported3,4,5, but in none of these cases could the process be controlled: the jumps varied from molecule to molecule, they were interrupted by spontaneous jumps, and the new excitation frequencies could not be identified unambiguously.…
A σ-Donor with a Planar Six-π-Electron B2N2C2 Framework: Anionic N-Heterocyclic Carbene or Heterocyclic Terphenyl Anion?
2006
NB! The anionic ligand 2 was synthesized through deprotonation of a planar, formally zwitterionic diazadiborine precursor, isolated as a lithium salt, and structurally characterized. According to experimental evidence and theoretical calculations, 2 can be considered as an intermediate between two classical classes of ligands: N-heterocyclic carbenes 1 and terphenyls 3. peerReviewed
2H NMR Time Domain Analysis of Ultraslow Reorientations in Supercooled Liquids
1998
A method for evaluating 2H NMR stimulated echo experiments in the time domain is presented. It exhibits a high sensitivity to molecular reorientation mechanisms for small angles. Reorientations with jump angles below 25degrees can be resolved with a precision of approximately 1degrees so that, e.g., rotational diffusion and finite jump angle mechanisms become distinguishable. The method, applicable to isotropic reorientation models, is thought to extend the domain of 2D exchange spectroscopy where the best resolution is obtained in the large angle range of anisotropic reorientational mechanisms. Application to reorientation in the supercooled melt of ortho-terphenyl is presented. These data…
Studies on the apoptotic activity of natural and synthetic retinoids: discovery of a new class of synthetic terphenyls that potently support cell gro…
2005
New terphenyl derivatives have been synthesized and tested for their effect on cell survival in serum-free cultures. These compounds protected HL60 cells from death and supported their growth with an activity higher than that of the natural 14-hydroxy-retro-retinol. Terphenyls 26 and 28 also possess antiapoptotic activity on neuronal cells, proving them as possible candidates for the treatment of neurodegenerative and ischemic diseases.
Dynamic anomalies at the glass transition of organic van der Waals liquids
1993
Abstract The paper discusses the question of whether there is a characteristic temperature T c above the calorimetric glass transition temperature T g . Mode-coupling theory (MCT) predicts a crossover from liquid- to solid-like dynamics at T c . Neutron scattering and gradient NMR experiments have been carried out to test MCT using the molecular van der Waals liquid ortho -terphenyl as a model system. A significant anomaly of the Debye—Waller factor and a “decoupling” of self-diffusion from viscosity support the MCT predictions. A critical discussion of the relevance of such tests and of the limitations of neutron scattering is presented.
CCDC 800788: Experimental Crystal Structure Determination
2011
Related Article: Hyui Sul Lee, M.Niemeyer|2011|Inorg.Chim.Acta|374|163|doi:10.1016/j.ica.2011.01.079
CCDC 1019227: Experimental Crystal Structure Determination
2015
Related Article: Andreas M. Bünzli, Edwin C. Constable, Catherine E. Housecroft, Alessandro Prescimone, Jennifer A. Zampese, Giulia Longo, Lidón Gil-Escrig, Antonio Pertegás, Enrique Ortí, Henk J. Bolink|2015|Chemical Science|6|2843|doi:10.1039/C4SC03942D
CCDC 1485223: Experimental Crystal Structure Determination
2017
Related Article: Cameron M. E. Graham, Taylor E. Pritchard, Paul D. Boyle, Juuso Valjus, Heikki M. Tuononen, Paul J. Ragogna|2017|Angew.Chem.,Int.Ed.|56|6236|doi:10.1002/anie.201611196
CCDC 1573803: Experimental Crystal Structure Determination
2017
Related Article: Paul J. Ragogna, Cameron Graham, Clement Millet, Amy N Price, Juuso Valijus, Michael J Cowley, Heikki Tuononen|2017|Chem.-Eur.J.|24|672|doi:10.1002/chem.201704337
CCDC 659088: Experimental Crystal Structure Determination
2007
Related Article: S.Balireddi, M.Niemeyer|2007|Acta Crystallogr.,Sect.E:Struct.Rep.Online|63|o3525|doi:10.1107/S1600536807031923