Polarized-electroabsorption spectroscopy of a soluble derivative of poly(p-phenylenevinylene) oriented by gel processing in polyethylene: Polarization anisotropy, the off-axis dipole moment, and excited-state delocalization

1994 ◽  
Vol 49 (16) ◽  
pp. 10968-10975 ◽  
Author(s):  
T. W. Hagler ◽  
K. Pakbaz ◽  
A. J. Heeger
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Polarization Anisotropy ◽  
Electroabsorption Spectroscopy ◽  
Gel Processing

Variational Method for Estimating the Dipole Moment in the Second Excited State of Fluorescein Molecule from its Electronic UV Absorption Spectra

2019 ◽  
Vol 70 (10) ◽  
pp. 3538-3544
Author(s):  
Alina Costina Luca ◽  
Ana Cezarina Morosanu ◽  
Irina Macovei ◽  
Dan Gheorghe Dimitriu ◽  
Dana Ortansa Dorohoi ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Variational Method ◽  
Electronic State ◽  
Excited Electronic State ◽  
Spectral Band ◽  
Uv Absorption ◽  
Optical Parameters ◽  
Electrical Permittivity ◽  
Fluorescein Molecule

Electro-optical parameters of fluorescein molecule in the second excited electronic state and information on the interactions with solvents were obtained from a solvatochromic study. Parameters of the solvents such as the refractive index, electrical permittivity and Kamlet-Taft parameters (hydrogen bond acidity and basicity) were related with the experimentally recorded shifts of UV absorption spectral band of fluorescein dissolved in several solvents. Through a variational method, the electric dipole moment and polarizability in excited state of fluorescein molecule were estimated. The calculus requires some parameters of the fluorescein molecule in the ground electronic state, which were determined through a quantum-mechanical study.

Excited-State Localization in a 3-Fold-Symmetric Molecule as Probed by Electroabsorption Spectroscopy

2004 ◽  
Vol 108 (43) ◽  
pp. 16834-16840 ◽  
Author(s):  
Prakriti Ranjan Bangal ◽  
Danny Ming Kuang Lam ◽  
Linda A. Peteanu ◽  
Mark Van der Auweraer
Keyword(s):  
Excited State ◽  
Symmetric Molecule ◽  
Electroabsorption Spectroscopy

Electroabsorption spectra of push–pull porphyrins in solution and in solid films

2015 ◽  
Vol 19 (01-03) ◽  
pp. 527-534
Author(s):  
Kamlesh Awasthi ◽  
Hung-Yu Hsu ◽  
Hung-Chu Chiang ◽  
Chi-Lun Mai ◽  
Chen-Yu Yeh ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Charge Transfer ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Ground State ◽  
Benzene Solution ◽  
Solid Films ◽  
The One ◽  
Interfacial Charge

Polarized electroabsorption (E-A) spectra of highly efficient porphyrin sensitizers (YD2 and YD2-oC8) have been measured in benzene solution. Polarized E-A spectra of these push–pull porphyrins embedded in poly(methyl methacrylate) films or sensitized on TiO 2 films are also observed. Based on the analysis of the E-A spectra, the magnitude of the electric dipole moment both in the ground state and in the lowest excited state have been evaluated in solution and in solid films. The electric dipole moment in the excited state of these compounds is very large on TiO 2 films, suggesting the interfacial charge transfer on TiO 2 surface following photoexcitation of porphyrin dyes. The electric dipole moment in the excited state evaluated from the E-A spectra is very different from the one evaluated from the electrophotoluminescence spectra on TiO 2, suggesting that the strong local field of TiO 2 films is applied to the fluorescing dyes attached to TiO 2 films.

Molecular and structural characterization of New Red and Erythrosine by fluorescence polarization spectroscopy

2017 ◽  
Vol 31 (19-21) ◽  
pp. 1740062
Author(s):  
Chun Zhu ◽  
Jia-Meng Du ◽  
Jin-Chen Zhao ◽  
Tuo Zhu ◽  
Guo-Qing Chen
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Ground State ◽  
Dipole Moments ◽  
Linear Structure ◽  
Polarization Spectroscopy ◽  
Angle Shift ◽  
Ground State Structures ◽  
Average Angle

The fundamental and the fluorescence anisotropies of New Red and Erythrosine were measured. The intersection angles between the absorption and the emission dipole moments for New Red and Erythrosine are 4.44[Formula: see text] and 23.26[Formula: see text], respectively. The average angle shift of the emission dipole moment of New Red is 3.91[Formula: see text] during the lifetime of the excited state. This indicates that it has a bifurcated linear structure with weak rotational capacity. The average angle shift of the emission dipole moment of Erythrosine is 9.25[Formula: see text], indicating that it has a partial planar structure and is easier to rotate. The spatial ground state structures were simulated with Gaussian 09.

Excited-state dipole moment and polarizability for the 3s Rydberg of ethylene oxide

1983 ◽  
Vol 87 (22) ◽  
pp. 4348-4351 ◽  
Author(s):  
Daniel D. Altenloh ◽  
B. R. Russell ◽  
Linda Rae Ashworth
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Ethylene Oxide ◽  
Excited State Dipole Moment

Insights into the electrooptical anion sensing properties of a new organic receptor: solvent dependent chromogenic response and DFT studies

RSC Advances ◽  
2016 ◽  
Vol 6 (78) ◽  
pp. 74649-74653 ◽  
Author(s):  
Srikala P. ◽  
Kartick Tarafder ◽  
A. Nityananda Shetty ◽  
Darshak R. Trivedi
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Dft Studies ◽  
Anion Sensing ◽  
Color Transition ◽  
Sensing Properties ◽  
Organic Receptor

AcO− ion mediated color transition properties of an organic receptor in solvents of varying polarity highlighting the influence of dipole moment in stabilizing the excited state.

Sign in / Sign up

Export Citation Format

Share Document