Time dependent DFT investigation of the optical properties of artificial light harvesting special pairs

2016 ◽  
Vol 18 (22) ◽  
pp. 15337-15351 ◽  
Author(s):  
Neha Agnihotri ◽  
Ronald P. Steer
Keyword(s):  
Optical Properties ◽  
Absorption Spectra ◽  
Light Harvesting ◽  
Time Dependent ◽  
Artificial Light

Simulated absorption spectra of (ZnTriPP)2DPB dimer in which Q band is enhanced 50 times for visibility.

scholarly journals Study of the colloidal stability and optical properties of sunscreen creams

2019 ◽  
Vol 44 (2) ◽  
pp. 26 ◽  
Author(s):  
Gustavo Pereira Saito ◽  
Mariana Bizari ◽  
Marco Aurélio Cebim ◽  
Marcos Antonio Correa ◽  
Miguel Jafelicci Junior ◽  
...  
Keyword(s):  
Optical Properties ◽  
Absorption Spectra ◽  
Colloidal Stability ◽  
Time Dependent ◽  
Water Dispersion ◽  
Cosmetic Product ◽  
Critical Wavelength ◽  
Oil Water ◽  
Cielab Color

Sunscreen formulations containing inorganic/organic filters or mixture of them were synthesized by oil/water dispersion. The viscosity measurements show that sunscreen formulations are time-dependent non-newtonian fluids. In the CIELab color diagram, the white and/or beige colors presented by formulations do not compromise the aesthetics of the cosmetic product. UV-VIS absorption spectra show that sunscreen creams have high UV shielding ability, mainly the formulations containing inorganic and organic filters mixtures, which provide in vitro SPF and critical wavelength values recommended for UV protection.

scholarly journals Modeling the optical properties of excitons in linear and tubular J-aggregates

2006 ◽  
Vol 2006 ◽  
pp. 1-10 ◽  
Author(s):  
Jasper Knoester
Keyword(s):  
Optical Properties ◽  
Fluorescence Spectra ◽  
Light Harvesting ◽  
Cyanine Dyes ◽  
Natural Light ◽  
Artificial Light ◽  
Absorption And Fluorescence Spectra ◽  
Harvesting Systems ◽  
J Aggregates ◽  
Frenkel Excitons

The theory of the optical properties of linear and tubular molecular J-aggregates is reviewed. The primary optical excitations in these systems are Frenkel excitons, which may be delocalized over many molecules. The collective nature of these excitations gives rise to special optical properties and dynamics, which are of interest for purely scientific reasons, but also enable the application of J-aggregates as photographic sensitizers and artificial light-harvesting systems. The focus of this paper is on the effect of aggregate geometry, disorder, and temperature on the absorption and fluorescence spectra. Also transport of excitations between J-aggregates is discussed. Connection is made to experiments on aggregates of cyanine dyes and natural light-harvesting systems.

A time-dependent modified Redfield theory for absorption spectra applied to light-harvesting systems

2007 ◽  
Vol 125 (1-2) ◽  
pp. 126-132 ◽  
Author(s):  
Markus Schröder ◽  
Michael Schreiber ◽  
Ulrich Kleinekathöfer
Keyword(s):  
Absorption Spectra ◽  
Light Harvesting ◽  
Time Dependent ◽  
Redfield Theory ◽  
Harvesting Systems

Efficient artificial light-harvesting systems based on aggregation-induced emission constructed in supramolecular gels

Soft Matter ◽  
2021 ◽  
Author(s):  
Xinxian Ma ◽  
bo qiao ◽  
Jinlong Yue ◽  
JingJing Yu ◽  
yutao geng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Light Harvesting ◽  
Artificial Light ◽  
Efficient Energy Transfer ◽  
Aggregation Induced Emission ◽  
Efficient Energy ◽  
Harvesting Systems ◽  
Acyl Hydrazone

Based on a new designed acyl hydrazone gelator (G2), we developed an efficient energy transfer supramolecular organogel in glycol with two different hydrophobic fluorescent dyes rhodamine B (RhB) and acridine...

Artificial Light-Harvesting Metallacycle System with Sequential Energy Transfer for Photochemical Catalysis

2021 ◽  
Vol 143 (3) ◽  
pp. 1313-1317
Author(s):  
Dengqing Zhang ◽  
Wei Yu ◽  
Suwan Li ◽  
Yan Xia ◽  
Xianying Li ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Harvesting ◽  
Artificial Light ◽  
Photochemical Catalysis

Aggregation effects on the optical properties of a light harvesting phenylacetylene dendrimer in non-polar solution

2004 ◽  
Vol 106 (3-4) ◽  
pp. 301-311 ◽  
Author(s):  
Benjamin L Davis ◽  
Joseph S Melinger ◽  
Dale McMorrow ◽  
Zhonghua Peng ◽  
Yongchun Pan
Keyword(s):  
Optical Properties ◽  
Light Harvesting ◽  
Polar Solution

scholarly journals Theoretical and experimental comparative studies of nonlinear optical properties for selected melaminium compounds

2010 ◽  
Vol 8 (6) ◽  
pp. 1192-1202 ◽  
Author(s):  
Marek Drozd ◽  
Mariusz Marchewka
Keyword(s):  
Optical Properties ◽  
Acetic Acid ◽  
Nonlinear Optical ◽  
Time Dependent ◽  
X Ray ◽  
Hartree Fock ◽  
Optical Applications ◽  
Experimental Values ◽  
Nonlinear Optical Applications ◽  
Theoretical Results

AbstractThe bis(melaminium) sulphate dihydrate, 2,4,6-triamine-1,3,5-triazin-1,3-ium tartrate monohydrate, 2,4,6-triamine-1,3,5-triazin-1-ium hydrogenphthalate, 2,4,6-triamine-1,3,5-triazin-1-ium acetate acetic acid solvate monohydrate, 2,4,6-triamine-1,3,5-triazin-1-ium bis(selenate) trihydrate, melaminium diperchlorate hydrate, melaminium bis(trichloroacetate) monohydrate and melaminium bis(4-hydroxybenzenesulphonate) dihydrate were discovered recently as perspective materials for nonlinear optical applications. On the basis of X-ray structures for eight melaminium compounds the time dependent Hartree Fock (TDHF) method was used for calculation of the polarizability, and first and second hyperpolarizability. Detailed directional studies of calculated hyperpolarizability for all investigated melaminium compounds are shown. The theoretical results are compared with experimental values of β.

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