Results 301 to 310 of about 777,754 (321)
Some of the next articles are maybe not open access.
Polysilane excited states and excited state dynamics
Chemical Physics, 1990Abstract Femtosecond time-resolved excited state absorption spectroscopy is used to reveal excited states of linear-chain poly(di- n -hexylsilane) about 1 eV and in the range of 3.5 eV above the lowest excited state. A description of the excited state dynamics following optical excitation in polysilanes is presented. The concept of conjugation length
S.A. Abrash +4 more
openaire +2 more sources
WIREs Computational Molecular Science, 2011
AbstractExcited‐state dynamics is the field of theoretical and physical chemistry devoted to simulating molecular processes induced upon UV‐visible light absorption. This involves nuclear dynamics methods to determine the time evolution of the molecular geometry used in concert with electronic structure methods capable of computing electronic excited ...
Lasorne, Benjamin +2 more
openaire +3 more sources
AbstractExcited‐state dynamics is the field of theoretical and physical chemistry devoted to simulating molecular processes induced upon UV‐visible light absorption. This involves nuclear dynamics methods to determine the time evolution of the molecular geometry used in concert with electronic structure methods capable of computing electronic excited ...
Lasorne, Benjamin +2 more
openaire +3 more sources
The Journal of Physical Chemistry, 1995
The electronic properties of 1,3,5,7-tetra-tert-butyl-s-indacen(eT TBI), the stable derivative of antiaromatic s-indacene, have been studied via absorption and resonance Raman spectroscopy at low temperature. The two strongest absorption regions, at e550 and 320 nm, show Franck-Condon structures suggesting change of excited-state geometry with respect ...
GELLINI, CRISTINA +3 more
openaire +3 more sources
The electronic properties of 1,3,5,7-tetra-tert-butyl-s-indacen(eT TBI), the stable derivative of antiaromatic s-indacene, have been studied via absorption and resonance Raman spectroscopy at low temperature. The two strongest absorption regions, at e550 and 320 nm, show Franck-Condon structures suggesting change of excited-state geometry with respect ...
GELLINI, CRISTINA +3 more
openaire +3 more sources
Excited States of Porphyrin Macrocycles
The Journal of Physical Chemistry A, 2008S1 --> S(n) spectra of porphyrin, diprotonated porphyrin, and tetraoxaporphyrin dication have been measured in the energy range 2-3 eV above S1 at room temperature in solution by means of transient absorption spectroscopy exciting with femtosecond pulses.
Moroni L. +4 more
openaire +6 more sources
Topical Meeting on Multiple Excitations of Atoms, 1986
Doubly excited atoms, with two excited electrons, occur both above and below the first ionization limit. The interactions between the doubly excited states and the energetically similar singly excited channels are manifested by autoionization and series perturbations in these two cases.
openaire +2 more sources
Doubly excited atoms, with two excited electrons, occur both above and below the first ionization limit. The interactions between the doubly excited states and the energetically similar singly excited channels are manifested by autoionization and series perturbations in these two cases.
openaire +2 more sources
Excited-State Acid−Base Chemistry: Evidence for a Dissociative Excited State [PDF]
Inorganic Chemistry, 2003 Excitation (410 nm) of the bimetallic [(bpy)(2)Ru(CN)(mu-CN)Rh(NH(3))(4)Br](2+) produces the MLCT state localized on the (bpy)(2)Ru(CN)(2) ligand. Photoinduced cleavage of the bimetallic occurs in the presence of [H(+)], and the dependence yields a K(a) equivalent to that for ground-state cis-(bpy)(2)Ru(CN)(2) implying separation of the bimetallic ...
Jianwei Fan +7 more
openaire +2 more sources
2011
This chapter provides a general overview of photochemistry and photophysics, starting with photochemical processes in everyday life and the nature of light. Then, a discussion about formation of electronic excited states by light absorption is presented together with their deactivation processes.
CERONI, PAOLA, BALZANI, VINCENZO
openaire +2 more sources
This chapter provides a general overview of photochemistry and photophysics, starting with photochemical processes in everyday life and the nature of light. Then, a discussion about formation of electronic excited states by light absorption is presented together with their deactivation processes.
CERONI, PAOLA, BALZANI, VINCENZO
openaire +2 more sources
Nuclear Physics B - Proceedings Supplements, 2003
The status of excited B-meson and b-baryon states is reviewed and new, preliminary analyses on Bu, d∗∗, Bs∗∗ and Σb(∗) are presented.
openaire +2 more sources
The status of excited B-meson and b-baryon states is reviewed and new, preliminary analyses on Bu, d∗∗, Bs∗∗ and Σb(∗) are presented.
openaire +2 more sources
The excited states of ethylene
The Journal of Chemical Physics, 1977On the basis of a review of existing experimental evidence, theoretical calculations, and other theoretical considerations a table of the observed excited states of ethylene is constructed, with assignments of essentially all lower-energy excited states to definite electron configurations, provided the observed V←N spectrum corresponds to a single ...
openaire +2 more sources
2010
In this chapter, we would like to describe the dynamics of an excited state |s〉 which is prepared, for example, by electronic excitation, due to absorption of radiation. This state is an eigenstate of the diabatic Hamiltonian with energy \( E_s^0 \). Close in energy to |s〉 is a manifold of other states {|l〉}, which are not populated during the short ...
Philipp O. J. Scherer +1 more
openaire +2 more sources
In this chapter, we would like to describe the dynamics of an excited state |s〉 which is prepared, for example, by electronic excitation, due to absorption of radiation. This state is an eigenstate of the diabatic Hamiltonian with energy \( E_s^0 \). Close in energy to |s〉 is a manifold of other states {|l〉}, which are not populated during the short ...
Philipp O. J. Scherer +1 more
openaire +2 more sources