Optical properties of regioregular poly(3-hexylthiophene) aggregates from fully atomistic investigations

CrystEngComm ◽  
2016 ◽  
Vol 18 (38) ◽  
pp. 7297-7304 ◽  
Author(s):  
Linjun Wang ◽  
David Beljonne
Keyword(s):  
Molecular Dynamics ◽  
Optical Properties ◽  
Optical Absorption ◽  
Quantum Chemical ◽  
Hybrid Approach ◽  
Emission Spectra ◽  
First Principle ◽  
Holstein Model ◽  
Regioregular Poly ◽  
Dynamics Simulations

We report on a first-principle theoretical investigation of the optical absorption and emission spectra of poly(3-hexylthiophene) (P3HT) aggregates by means of a multiscale all-atom hybrid approach, which combines molecular dynamics simulations, quantum-chemical calculations, and solving of a Frenkel–Holstein model.

Investigation of the interfacial behavior of organics on sulfide semiconductor surfaces by quantum chemical calculations and molecular dynamics simulations

2021 ◽  
Author(s):  
Haiding Zhu ◽  
Xuefeng Ren ◽  
Shengxiang Yan ◽  
Xingyou Liang ◽  
Liguo Gao ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Quantum Chemical Calculations ◽  
Organic Pollutants ◽  
Quantum Chemical ◽  
Semiconductor Surfaces ◽  
Interfacial Behavior ◽  
The World ◽  
Dynamics Simulations

The presence of organic pollutants in the world is harmful to our existence and the environment.

scholarly journals Recognition of shorter and longer trimethyllysine analogues by epigenetic reader proteins

2018 ◽  
Vol 54 (19) ◽  
pp. 2409-2412 ◽  
Author(s):  
Abbas H. K. Al Temimi ◽  
Roman Belle ◽  
Kiran Kumar ◽  
Jordi Poater ◽  
Peter Betlem ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Thermodynamic Data ◽  
Quantum Chemical ◽  
Chemical Studies ◽  
Quantum Chemical Studies ◽  
Dynamics Simulations

Combined thermodynamic data, molecular dynamics simulations, and quantum chemical studies reveal that epigenetic reader proteins efficiently bind trimethylornithine and trimethylhomolysine.

scholarly journals Insight into the Role of Water on the Methylation of Hexamethylbenzene in H‐SAPO‐34 from First Principle Molecular Dynamics Simulations

ChemCatChem ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 3993-4010 ◽  
Author(s):  
Simon Bailleul ◽  
Sven M. J. Rogge ◽  
Louis Vanduyfhuys ◽  
Veronique Van Speybroeck
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
First Principle ◽  
Dynamics Simulations ◽  
Insight Into

scholarly journals Synthesis and optical properties of new 5'-aryl-substituted 2,5-bis(3-decyl-2,2'-bithiophen-5-yl)-1,3,4-oxadiazoles

2017 ◽  
Vol 13 ◽  
pp. 313-322 ◽  
Author(s):  
Anastasia Sergeevna Kostyuchenko ◽  
Tatyana Yu Zheleznova ◽  
Anton Jaroslavovich Stasyuk ◽  
Aleksandra Kurowska ◽  
Wojciech Domagala ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Chemical ◽  
Emission Spectra ◽  
Aryl Halides ◽  
Aryl Substituent ◽  
Tddft Calculations ◽  
Terminal Substituent ◽  
Bluish Green ◽  
Palladium Catalyzed ◽  
Donor Acceptor

New photoluminescent donor–acceptor–donor (DAD) molecules, namely 5'-aryl-substituted 2,5-bis(3-decyl-2,2'-bithiophen-5-yl)-1,3,4-oxadiazoles were prepared by palladium-catalyzed coupling from readily available compounds such as ethyl 3-decyl-2,2'-bithiophene-5-carboxylate and aryl halides. The obtained compounds feature increasing bathochromic shifts in their emission spectra with increasing aryl-substituent size yielding blue to bluish-green emissions. At the same time, their absorption spectra are almost independent from the identity of the terminal substituent with λmax values ranging from 395 to 405 nm. The observed trends are perfectly predicted by quantum chemical DFT/TDDFT calculations carried out for these new molecules.

Classical versus ab initio structural relaxation: electronic excitations and optical properties of Ge nanocrystals embedded in a SiC matrix

2004 ◽  
Vol 832 ◽  
Author(s):  
Giancarlo Cappellini ◽  
H.-Ch. Weissker ◽  
D. De Salvator ◽  
J. Furthmüller ◽  
F. Bechstedt ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Optical Properties ◽  
Ab Initio ◽  
First Principles ◽  
Electronic Excitation ◽  
First Principle ◽  
Electronic Excitations ◽  
Combined Method ◽  
Classical Molecular Dynamics ◽  
Ge Nanocrystals

ABSTRACTWe discuss and test a combined method to efficiently perform ground- and excited-state calculations for relaxed structures using both a quantum first-principles approach and a classical molecular-dynamics scheme. We apply this method to calculate the ground state, the optical properties, and the electronic excitations of Ge nanoparticles embedded in a cubic SiC matrix. Classical molecular dynamics is used to relax the large-supercell system. First-principles quantum techniques are then used to calculate the electronic structure and, in turn, the electronic excitation and optical properties. The proposed procedure is tested with data resulting from a full first-principles scheme. The agreement is quantitatively discussed between the results after the two computational paths with respect to the structure, the optical properties, and the electronic excitations. The combined method is shown to be applicable to embedded nanocrystals in large simulation cells for which the first-principle treatment of the ionic relaxation is presently out of reach, whereas the electronic, optical and excitation properties can already be obtained ab initio. The errors incurred from the relaxed structure are found to be non-negligible but controllable.

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