Results 101 to 110 of about 149,392 (288)

Comparative studies of two vegetal extracts from Stokesia laevis and Geranium pratense: polyphenol profile, cytotoxic effect and antiproliferative activity

open access: yesOpen Chemistry, 2020
The localization of frontier molecular orbitals (FMOs) for LUTEOLIN: HOMO (the highest occupied molecular orbital) and LUMO (the lowest unoccupied molecular orbital).
Pirvu Lucia   +4 more
doaj   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

open access: yesAdvanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Spectra and Charge Transport of Polar Molecular Photoactive Layers Used for Solar Cells

open access: yesJournal of Chemistry, 2015
The ground state structures, HOMO and LUMO energy levels, band gaps ΔH-L, ionization potentials (IP), and electron affinities (EA) of three types of copolymer P1 and its derivatives P2, P3, and PBDT-BTA were investigated by using density functional ...
Yuanzuo Li   +3 more
doaj   +1 more source

The Comparison of Primary, Secondary and Tertiary Amine Ligands on Palladium (II) Complex Ion on Thermo-Physical, Chemical Reactivity, and Biological Properties: A DFT Study

open access: yesCumhuriyet Science Journal, 2019
The Palladium is consideredas the catalyst for coupling reaction and useful metal in industry. Thethermo-physical, chemical reactivity and biological interaction are consideredthe most expected parameters for use in any area of the chemical industry ...
Md. Nuruzzaman Sarker   +3 more
doaj   +1 more source

Organic Materials of Tomorrow: Horizons of Artificial Intelligence

open access: yesAdvanced Materials, EarlyView.
This review examines machine learning techniques accelerating the discovery of organic semiconductors by linking molecular structure to properties. Key methods include graph neural networks, generative models, and active learning. Applications to organic photovoltaics demonstrate practical impact.
Harold Mena   +3 more
wiley   +1 more source

HOMO and LUMO energies and natural population analysis charges from DFTa.

open access: yes, 2016
HOMO and LUMO energies and natural population analysis charges from DFTa.
Stefan Mebs (1455724)   +6 more
core   +1 more source

Why Is the Mechanism Underlying the Chiral‐Induced Selectivity Effect Still Challenging?

open access: yesAdvanced Materials, EarlyView.
The chiral‐induced spin selectivity (CISS) effect is observed in many experimental configurations and for different materials. However, there are theoretical challenges in attempting to explain those results. A qualitative framework for explaining all the results is presented.
Ron Naaman, Yossi Paltiel
wiley   +1 more source

Bond Phase Determination of HOMO/LUMO and ‘Ethylene’ in Benzenoid Hydrocarbons

open access: yesZeitschrift für Naturforschung A, 2002
Classical valence theory suggests the existence of strongly localized bonds (double bonds), i.e., of ethylene-like molecules, in benzenoid hydrocarbons (molecular graphs Bs); such an ‘ethylene’ is an edge in a hexagon that contacts with three hexagon faces in B. The phase of a bond is defined as the sign either plus for bonding or minus for antibonding.
Tetsuo Morikawa   +2 more
openaire   +1 more source

Phase Engineering of Atomically Precise Nanoclusters (APNCs) of Gold and Beyond

open access: yesAdvanced Materials, EarlyView.
Engineering the structural phase of materials is of paramount importance for both fundamental research and practical applications. In this Review, we summarize the recent progress in controlling the phases of atomically precise nanoclusters (APNCs) of gold, silver and copper, as well as bimetallic systems. The phase‐enabled material properties of APNCs
Yitong Wang   +4 more
wiley   +1 more source

A Graph-theoretical Analysis of the HOMO-LUMO Separation in Conjugated Hydrocarbons

open access: yesZeitschrift für Naturforschung B, 1974
Graph-theoretical rules concerning the HOMO-LUMO separation in conjugated hydrocarbons are given. It has been found that a closure of odd-membered rings will not essentially change the HOMO-LUMO energy gap (ΔΕ). However, ΔΕ will be shifted down or up depending whether a (4m + 1)-or (4m + 3)-ring is closed.
I. Gutman, J. V. Knop, N. Trinajstić
openaire   +1 more source

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