Switching Off the Charge Transfer and Closing the S1–T1 ISC Channel in Excited States of Quinolizinium Derivatives: A Theoretical Study

2014 ◽  
Vol 79 (9) ◽  
pp. 3799-3808 ◽  
Author(s):  
Soydan Yalcin ◽  
Laura Thomas ◽  
Maoqun Tian ◽  
Nurgul Seferoglu ◽  
Heiko Ihmels ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Theoretical Study

Theoretical study on photo-induced processes of 1-methyl-3-(N-(1,8-naphthalimidyl)ethyl)imidazolium halide species: an application of constrained density functional theory

2018 ◽  
Vol 20 (6) ◽  
pp. 3911-3917 ◽  
Author(s):  
Takao Otsuka ◽  
Masato Sumita ◽  
Hironori Izawa ◽  
Kenji Morihashi
Keyword(s):  
Density Functional Theory ◽  
Charge Transfer ◽  
Excited States ◽  
Density Functional ◽  
Theoretical Study ◽  
Functional Theory ◽  
Molecular Charge ◽  
Intra Molecular Charge Transfer

Inter-molecular charge transfer (SET) and intra-molecular charge transfer (SM1) excited states are involved in the photo-induced processes of 1-methyl-3-(N-(1,8-naphthalimidyl)ethyl)imidazolium halide.

Theoretical Studies on Phosphorescent Materials: The Conjugation-Extended PtII Complexes

2014 ◽  
Vol 67 (10) ◽  
pp. 1522 ◽  
Author(s):  
Ai-Hua Liang ◽  
Fu-Quan Bai ◽  
Jian Wang ◽  
Jian-Bo Ma ◽  
Hong-Xing Zhang
Keyword(s):  
Charge Transfer ◽  
Decay Rate ◽  
Excited States ◽  
Rate Constants ◽  
Radiative Decay ◽  
Theoretical Study ◽  
Radiative Decay Rate ◽  
Ligand Charge Transfer ◽  
Emission Transition ◽  
Transfer Properties

A theoretical study on the PtII complex A based on a dimesitylboron (BMes2)-functionalized [Pt(C^N)(acac)] (C^N = 2-phenyl-pyridyl, acac = acetylaceton) complex, as well as three conjugation-extended analogues of the methylimidazole (C*) ligand BMes2-[Pt(C^C*)(acac)] complexes B–D is performed. Their theoretical geometries, electronic structures, emission properties, and the radiative decay rate constants (kr) were also investigated. The energy differences between the two highest occupied orbitals with dominant Pt d-orbital components (Δddocc) of D both at the ground and excited states are the smallest of all. Compared with B, the charge transfer in D possesses a marked trend towards the extended conjugated group, while C changed inconspicuously. The lowest-lying absorptions and the phosphorescence of them can be described as a mixed metal-to-ligand charge transfer (MLCT)/intra-ligand π→π* charge transfer (ILCT) and 3MLCT/3ILCT, respectively. The variation of charge transfer properties induced by extended conjugation and the radiative decay rate constants (kr) calculated revealed that D is a more efficient blue phosphorescence material with a 497 nm emission transition.

Synthesis and Photochemical Properties of Re(I) Tricarbonyl Complexes Bound to Thione and Thiazole-2-ylidene Ligands

2020 ◽  
Author(s):  
Matthew Stout ◽  
Brian Skelton ◽  
Alexandre N. Sobolev ◽  
Paolo Raiteri ◽  
Massimiliano Massi ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Ligand Exchange ◽  
Ligand Substitution ◽  
Bidentate Ligand ◽  
The Other ◽  
Ligand Exchange Reaction ◽  
Multiple Products ◽  
Ligand Charge Transfer ◽  
Photochemical Properties

<p>Three Re(I) tricarbonyl complexes, with general formulation Re(N^L)(CO)<sub>3</sub>X (where N^L is a bidentate ligand containing a pyridine functionalized in the position 2 with a thione or a thiazol-2-ylidene group and X is either chloro or bromo) were synthesized and their reactivity explored in terms of solvent-dependent ligand substitution, both in the ground and excited states. When dissolved in acetonitrile, the complexes bound to the thione ligand underwent ligand exchange with the solvent resulting in the formation of Re(NCMe)<sub>2</sub>(CO)<sub>3</sub>X. The exchange was found to be reversible, and the starting complex was reformed upon removal of the solvent. On the other hand, the complexes appeared inert in dichloromethane or acetone. Conversely, the complex bound to the thiazole-2-ylidene ligand did not display any ligand exchange reaction in the dark, but underwent photoactivated ligand substitution when excited to its lowest metal-to-ligand charge transfer manifold. Photolysis of this complex in acetonitrile generated multiple products, including Re(I) tricarbonyl and dicarbonyl solvato-complexes as well as free thiazole-2-ylidene ligand.</p>

Charge Transfer Between CO22+ and Ar or Ne at Collision Energies 3-10 eV

2003 ◽  
Vol 68 (1) ◽  
pp. 178-188 ◽  
Author(s):  
Libor Mrázek ◽  
Ján Žabka ◽  
Zdeněk Dolejšek ◽  
Zdeněk Herman
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Ground State ◽  
Scattering Method ◽  
Translational Energy ◽  
Centre Of Mass ◽  
Energy Distributions ◽  
Zener Model ◽  
Beam Scattering ◽  
Product Ions

The beam scattering method was used to investigate non-dissociative single-electron charge transfer between the molecular dication CO22+ and Ar or Ne at several collision energies between 3-10 eV (centre-of-mass, c.m.). Relative translational energy distributions of the product ions showed that in the reaction with Ar the CO2+ product was mainly formed in reactions of the ground state of the dication, CO22+(X3Σg-), leading to the excited states of the product CO2+(A2Πu) and CO2+(B2Σu+). In the reaction with Ne, the largest probability had the process from the reactant dication excited state CO22+(1Σg+) leading to the product ion ground state CO2+(X2Πg). Less probable were processes between the other excited states of the dication CO22+, (1∆g), (1Σu-), (3∆u), also leading to the product ion ground state CO2+(X2Πg). Using the Landau-Zener model of the reaction window, relative populations of the ground and excited states of the dication CO22+ in the reactant beam were roughly estimated as (X3Σg):(1∆g):(1Σg+):(1Σu-):(3∆u) = 1.0:0.6:0.5:0.25:0.25.

scholarly journals Theoretical study of Charge Transfer simulation At Fe Metal with Ge and ZnO semiconductors Nano devices material

2017 ◽  
Vol 119 ◽  
pp. 325-331 ◽  
Author(s):  
Hadi J.M. Al-Agealy ◽  
Taif Saad Al Maadhede ◽  
B. Al Shafaay ◽  
Raad H. Mjeed ◽  
Ahmed M. Ashweik
Keyword(s):  
Charge Transfer ◽  
Theoretical Study
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