PPT-Can Internal Conversion be Controlled by Mode-specific Vibrational Excitation in Polyatomic

Michael E pshtein Alexander Portnov and Ilana Bar Department of Physics BenGurion University of the Negev Beer Sheva 84105 ISRAEL Introduction Conical intersections points of degeneracy . Ionic Compounds. Ionic Compounds. In this section…. Monatomic and Polyatomic ions. Ionic compound formulas. Naming ionic compounds. Covalent vs. Ionic compounds. Formation of Ions. Cations: Positive ions form by loss of electrons.. 6 Polyatomic Ions. Polyatomic Ions . Tightly bound groups of atoms that behave as a unit and carry a charge.. Ammonium . NH. 4. +. Cyanide. CN. -. Sulfite . SO. 3. 2-. Examples:. Common Polyatomic Ions. SNC2D. Polyatomic Ions. Polyatomic ions are groups of atoms that tend to stay together and carry an overall ionic charge. The ion is typically held together with covalent bonds. The polyatomic ion is capable of bonding with other ions. Some. polyatomic ions exist in families:. Parent ion. (-“ate” ending). Derivatives. (related to parent). obtained by:. adding a hydrogen atom, OR. adding/removing oxygen atoms. Type 1: When hydrogen is added. Nomenclature Warm-up #6. . Identify these compounds as ionic or covalent, then name them. Remember to use Roman numerals when necessary!. ____ (I or C) 1. V. 3. As. 2. ____ (I or C) 2. Hg. 3. P. ____ (I or C) 3. . Multivalent & Polyatomic Ions. Multivalent Metals. Multi = multiple. Valent. = charge. Metal = specifically transition metals. . List all of the possible . valencies. for the following metals:. H. H. O. Bend. Diatomic Molecules. So far we have studied vibrational spectroscopy in the form of harmonic and . anharmonic. oscillators.. Technically these models only apply to diatomic molecules. We will still use them as tools to make analogies for the vibrational behaviour of bigger molecules. . . angle with the electrode angular size of . . el. , as shown in a fig. 8.1. In this case the wave is "bound" to an excitation electrode, i.e. the wave is not free, as opposed to parametric excitation. Under positioning excitation the forces . Hitachi-. HiTec. Electronic Excitation Model. A. ~. X. ~. g. Excitation. (. Absorption. ). Radiationless. decay. (vibrational relaxation). g. Fluorescence. . (Fast . radiative. decay). Internal conversion. Andrea Lui, MD, Fernando Verdugo, MD, Patricio Julio, MD, Carlos Piedra, MD, . Marianella. . . Seguel. , MD; Mauricio Moreno, MD, . Rodulfo. . Oyarzún. , MD, Instituto Nacional del Tórax. . Santiago of Chile . M. Fitterer. , S. . Papadopoulou. , Y.  . Papaphilippou. , G. . Papotti. , D. Pellegrini, S. . Redaelli. , . G. . Stancari. , G. . Valentino, . A. . Valishev. , D. . . Valuch. , J. Wagner, C. Xu. Acknowledgements:. Chapter 5: Molecules and Compounds. Learning Goals. Distinguish . between common and systematic names for compounds. . Name . binary ionic compounds containing a metal that forms only one type of ion.. Polyatomic Ions . Tightly bound groups of atoms that behave as a unit and carry a charge.. Ammonium . NH. 4. +. Cyanide. CN. -. Sulfite . SO. 3. 2-. Examples:. Common Polyatomic Ions. with a -1 charge. Mike Bayne and . Ari Chakraborty. Department of Chemistry. Syracuse University. Funding: NSF, ACS-PRF, Syracuse University. Objective: . To describe electron-hole screening without using unoccupied states.