Reflection and absorption spectra of singlet charge transfer excitons in anthracene–PMDA crystals

1980 ◽  
Vol 72 (7) ◽  
pp. 4019-4030 ◽  
Author(s):  
Aldo Brillante ◽  
Michael R. Philpott
Keyword(s):  
Charge Transfer ◽  
Absorption Spectra ◽  
Charge Transfer Excitons

Free and Self-Trapped Charge-Transfer Excitons in Crystals of Dipolar Molecules ofN,N-Dimethylaminobenzylidene 1,3-Indandione

1998 ◽  
Vol 102 (7) ◽  
pp. 1086-1094 ◽  
Author(s):  
S. Jursenas ◽  
A. Gruodis ◽  
G. Kodis ◽  
M. Chachisvilis ◽  
V. Gulbinas ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Dipolar Molecules ◽  
Charge Transfer Excitons ◽  
Trapped Charge

Charge transfer excitons in halogen-bridged mixed valence complexes

1987 ◽  
Vol 19 (1-3) ◽  
pp. 907-910 ◽  
Author(s):  
Y. Wada ◽  
T. Mitani ◽  
M. Yamashita ◽  
T. Koda
Keyword(s):  
Charge Transfer ◽  
Mixed Valence ◽  
Charge Transfer Excitons

The Binding Energy of Charge-Transfer Excitons Localized at Polymeric Semiconductor Heterojunctions

2011 ◽  
Vol 115 (14) ◽  
pp. 7114-7119 ◽  
Author(s):  
Simon Gélinas ◽  
Olivier Paré-Labrosse ◽  
Colin-Nadeau Brosseau ◽  
Sebastian Albert-Seifried ◽  
Christopher R. McNeill ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Binding Energy ◽  
Polymeric Semiconductor ◽  
Semiconductor Heterojunctions ◽  
Charge Transfer Excitons

scholarly journals Layer-resolved many-electron interactions in delafossite PdCoO2 from standing-wave photoemission spectroscopy

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Qiyang Lu ◽  
Henrique Martins ◽  
Juhan Matthias Kahk ◽  
Gaurab Rimal ◽  
Seongshik Oh ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Standing Wave ◽  
Three Dimensional ◽  
Photoemission Spectroscopy ◽  
Electronic Coupling ◽  
Many Body ◽  
X Ray ◽  
Charge Transfer Excitons ◽  
Many Body Interactions ◽  
Electron Interactions

AbstractWhen a three-dimensional material is constructed by stacking different two-dimensional layers into an ordered structure, new and unique physical properties can emerge. An example is the delafossite PdCoO2, which consists of alternating layers of metallic Pd and Mott-insulating CoO2 sheets. To understand the nature of the electronic coupling between the layers that gives rise to the unique properties of PdCoO2, we revealed its layer-resolved electronic structure combining standing-wave X-ray photoemission spectroscopy and ab initio many-body calculations. Experimentally, we have decomposed the measured VB spectrum into contributions from Pd and CoO2 layers. Computationally, we find that many-body interactions in Pd and CoO2 layers are highly different. Holes in the CoO2 layer interact strongly with charge-transfer excitons in the same layer, whereas holes in the Pd layer couple to plasmons in the Pd layer. Interestingly, we find that holes in states hybridized across both layers couple to both types of excitations (charge-transfer excitons or plasmons), with the intensity of photoemission satellites being proportional to the projection of the state onto a given layer. This establishes satellites as a sensitive probe for inter-layer hybridization. These findings pave the way towards a better understanding of complex many-electron interactions in layered quantum materials.

scholarly journals Энергетический спектр и оптическое поглощение эндоэдральных комплексов Er-=SUB=-2-=/SUB=-C-=SUB=-2-=/SUB=-@C-=SUB=-90-=/SUB=- на основе изомеров N 21 и N 44

2021 ◽  
Vol 129 (9) ◽  
pp. 1111
Author(s):  
А.И. Мурзашев ◽  
А.П. Жуманазаров ◽  
М.Ю. Кокурин
Keyword(s):  
Experimental Data ◽  
Charge Transfer ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Coulomb Interaction ◽  
Energy Spectra ◽  
Optical Absorption Spectra ◽  
Endohedral Complexes

The article simulates the optical absorption spectra (OAS) of endohedral complexes Er2C2 @ C90 based on isomers No. 44 (C2) No. 21 (C1) of fullerene C90. For this purpose, the energy spectra of the indicated isomers have been calculated. The calculation was carried out within the framework of two models. Within the framework of the first model, which is traditional, only hops of π-electrons from site to site were taken into account (the integral of hopping to the nearest sites B ~ -2.6 eV). Within the framework of the second model, developed in a series of our works [1-5], in addition to hopping from site to site (the integral of hopping to the nearest sites B ~ -1.0 eV), the intrasite Coulomb interaction (ICCI) of π-electrons was also taken into account (the integral of the Coulomb interaction U ~ 7.0 eV). Comparison of the OSS curves obtained by us with the experimental data [5] convincingly indicates that the second model adequately describes the OSS of the endohedral Er2C2 @ C90 complexes based on the investigated isomers. The magnitude of charge transfer from the Er2C2 system to the fullerene shell turned out to be -4e.

scholarly journals Cation Sensing Capabilities of A Nitrophenyl Cinnamaldehyde Derivative

Molekul ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 191
Author(s):  
Venty Suryanti ◽  
Fajar Rakhman Wibowo ◽  
Ahmad Marzuki ◽  
Meiyanti Ratna Kumala Sari
Keyword(s):  
Charge Transfer ◽  
Organic Compound ◽  
Charge Density ◽  
Absorption Spectra ◽  
Color Change ◽  
Metal Cations ◽  
Colorimetric Sensing ◽  
Color Changes ◽  
Ligand Charge Transfer ◽  
Cation Sensing

The cationic chemosensor based on organic compound bearing an aminophenol moiety as a receptor for metal analyte and a cinnamaldehyde moiety as chromophoric fragment has been developed. In this work, we report the colorimetric sensing of nitrophenyl cinnamaldehyde derivative, namely methyl-3-(2-hidroxy-5-nitrophenyl amino)-3-phenylpropanoate, towards a variety of metal cations, such as Cu2+, Fe3+, Ni2+ and Zn2+. The cation sensing abilities of the sensor were observed for Cu2+and Fe3+ with a color change from colorless to pink and faint yellow, respectively, The characteristic UV-Vis spectra changes were observed upon addition of Cu2+and Fe3+ cations. The hypsochromic absorption spectra shifts were obtained, indicating the cations and sensor complexations had formed. A metal-to-ligand-charge-transfer (MLCT) had occurred and the charge density of the sensor changed resulting in appearance of new absorption peaks in the UV-Vis spectra and color changes of the sensor solution upon addition of the Cu2+and Fe3+.  

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