Inversion of the 11Bu and 21Ag electronic states of all-trans-1,6-diphenyl-1,3,5-hexatriene in carbon disulfide

2017 ◽  
Vol 19 (39) ◽  
pp. 27099-27104 ◽  
Author(s):  
Javier Catalán
Keyword(s):  
Absorption Spectra ◽  
Carbon Disulfide ◽  
Electronic States ◽  
Emission Spectra ◽  
Excited Electronic States

From the analysis of UV/Vis absorption spectra, emission and excitation emission spectra of solutions of all-trans-1,6-diphenyl-1,3,5-hexatriene (DPH) in carbon disulfide, we can conclude that these spectra do not support the inversion of excited electronic states in DPH by an increased solvent polarizability as proposed by Kohler and Itoh.

General discussion: electronic emission spectroscopy of CF+4 and SiF+4

1988 ◽  
Vol 324 (1578) ◽  
pp. 289-293 ◽  
Keyword(s):  
Emission Spectroscopy ◽  
Molecular Beam ◽  
Rotational Temperature ◽  
Electronic States ◽  
Emission Spectra ◽  
Fluorescence Decay ◽  
Molecular Ions ◽  
Dissociation Channel ◽  
Excited Electronic States ◽  
Beam Electron

We report the observation of electronic emission spectra in the tetrahedral molecular ions CF+4 and SiF+4. The spectra are observed at a low rotational temperature (less than 30 K) in a crossed molecular-beam - electron-beam apparatus (Carrington & Tuckett 1980). These spectra are especially interesting because the fluorescing states in the two ions lie up to 10 eV above their lowest dissociation channel (to CF+3/SiF+3 + F; see figure 1), and these states might be expected to decay non-radiatively rather than by a radiative channel. The observation of fluorescence decay from highly excited electronic states of these polyatomic ions is therefore a very surprising phenomenon.

Electronic Spectra of Single-Crystal Maleonitriledithiolate Complexes of Iridium (I): [Ir(CO)2mnt] TBA (mnt ≡ [S2C2(CN)2]2-; TBA ≡ [(C4H9)4N] + )

1989 ◽  
Vol 44 (11) ◽  
pp. 1057-1062
Author(s):  
U. Riedl ◽  
G. Gliemann
Keyword(s):  
Charge Transfer ◽  
Magnetic Fields ◽  
Optical Absorption ◽  
Single Crystal ◽  
Electronic Spectra ◽  
Electronic States ◽  
Emission Spectra ◽  
Spin Orbit ◽  
Excited Electronic States ◽  
Decay Times

The polarized optical absorption and emission (spectra, decay times) of single-crystal [lr(CO)2mnt] TBA at temperatures 2 K≦T≤295 K and homogeneous magnetic fields O≦H≦6T are reported. The highly resolved spectra show 0-0 transitions with vibrational satellites and phonon side bands. Applied magnetic fields yield no effect on the emission. The lowest excited electronic states can be assigned to the spin-orbit components A′1 B′1 and B′1 of the charge transfer triplet 3A2 (symmetry C2v)

The absorption spectrum of liquid bromine

1937 ◽  
Vol 162 (910) ◽  
pp. 414-419 ◽  
Author(s):  
D. Porret ◽  
Frederick George Donnan
Keyword(s):  
Absorption Spectrum ◽  
Absorption Spectra ◽  
Ground State ◽  
Wave Length ◽  
Electronic States ◽  
Excited Electronic States ◽  
Long Wave ◽  
Liquid Bromine ◽  
Continuous Absorption ◽  
The Continuum

The continuous absorption spectra of gaseous bromine (Peskow 1917; Ribaud 1919; Gray and Style 1929; Acton, Aikin and Bayliss 1936) and of dissolved bromine (Bovis 1929; Gillam and Morton 1929) have been studied many times. They present a wide continuum (from about 30, 000 to 17, 000 cm. -1 .) with a maximum at 24, 000 cm. -1 . For the gas the continuum is preceded by two band systems on the long wave-length side. These systems converge at 19, 585 and 15, 896 cm. -1 . respectively. Acton, Aikin and Bayliss (1936) have shown that the continuum is not simple, and Mulliken (1936) and Darbyshire (1937) have pointed out that there are three overlapping continua corresponding to transitions from the ground state to three different excited electronic states. There are 3 II 0 + ← 1 Σ g , 3 II 1 ← 1 Σ g and 1 II ← 1 Σ g . The absorption spectrum of liquid bromine has been studied by Bovis (1929) form 18, 525 to 31, 750c cm. -1 . and by Camichel (1893) for two frequencies only (16, 978 and 18, 691 cm. -1 ).

The simulation of X-ray absorption spectra from ground and excited electronic states using core-valence separated DFT/MRCI

2019 ◽  
Vol 151 (14) ◽  
pp. 144104 ◽  
Author(s):  
Issaka Seidu ◽  
Simon P. Neville ◽  
Martin Kleinschmidt ◽  
Adrian Heil ◽  
Christel M. Marian ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Electronic States ◽  
Excited Electronic States ◽  
X Ray ◽  
X Ray Absorption

The Ã1A″(S1) excited electronic states of HCN and DCN: Isotopic evidence that unifies experiment and theory

1984 ◽  
Vol 62 (12) ◽  
pp. 1763-1774 ◽  
Author(s):  
G. A. Bickel ◽  
K. K. Innes
Keyword(s):  
High Resolution ◽  
Ab Initio ◽  
Absorption Spectra ◽  
Electronic Transition ◽  
Vacuum Ultraviolet ◽  
Electronic States ◽  
Excited Electronic States ◽  
Isotopic Shifts ◽  
Ab Initio Theory ◽  
First Time

High-resolution vacuum ultraviolet absorption spectra of D13CN and DC15N are photographed, especially for comparison with the so-called β–X system, observed previously for DCN but not for HCN. Isotopic shifts establish the absolute vibrational numbering for this system, yielding its assignment to the [Formula: see text] transition. The measured bands between 53 100 and 65 200 cm−1 are thereby accommodated by a single electronic transition as predicted by ab initio theory. Constants of all three Ã-state vibrations of HCN and each DCN are determined for the first time.

Optical Properties and Dynamics of Molecular Excitons in Oligothiophenes

1995 ◽  
Vol 413 ◽  
Author(s):  
R. Tubino ◽  
G. Bongiovanni ◽  
A. Mura ◽  
R. Bosisio ◽  
C. Botfa ◽  
...  
Keyword(s):  
Experimental Data ◽  
Optical Properties ◽  
Solid State ◽  
Inclusion Compound ◽  
Electronic States ◽  
Emission Spectra ◽  
Excited Electronic States ◽  
Exciton Model ◽  
Time Resolved ◽  
Molecular Excitons

ABSTRACTCW absorption and emission spectra as well as time-resolved photoemission dynamics have been employed to detect the evolution of the first excited electronic states and the associated spectroscopical changes in passing from the isolated molecules to the aggregated state in thiophene oligomers. To this end a novel form of inclusion compound in PHTP in which the molecules are electronically decoupled in the solid state has been studied, thus avoiding the complications associated with the change in conformation occurring upon dissolution. The experimental data are interpreted in terms of the molecular exciton model.

Sign in / Sign up

Export Citation Format

Share Document