Results 21 to 30 of about 11,711 (150)

Large‐Scale Determination of Frontier Orbital Energies of Disordered Small‐Molecule Organic Semiconductors Using Exciplex Emission Spectra

Advanced Materials, EarlyView.
ABSTRACT Accurately knowing the frontier orbital energies of the structurally disordered small‐molecule organic semiconductors that are used in optoelectronic devices such as organic light‐emitting diodes is required to rationally improve their performance. Here, we show that these energies can be deduced with a large accuracy from the peak energies of
Christian B. McDonald, Hiroki Tomita, Giacomo Cotelli, Louka L. Brüll, Nanno G. de Rooij, Lucas R.L. Norg, Milo Clément, Reinder Coehoorn   +7 more
wiley   +1 more source

A Strong Lewis Acidic Diethylsilylium Catalyst for Direct Sulfonamidation of Challenging Ketones

Advanced Science, EarlyView.
Low‐substitution‐order silylium ions (R2HSi+) exhibit exceptional Lewis acidic activity. We report diethylsilylium‐catalyzed reductive sulfonamidation of functionalized ketones to access β‐amino esters. The in situ generated ion pair shows enhanced reactivity, with diethylsilane serving as both reductant and precatalyst. The developed protocol proceeds
Woo Hee Kim, Muhammad Israr, You Kyoung Chung, Shinwon Ham, Joonsuk Huh, Han Yong Bae   +5 more
wiley   +1 more source

Computation‐Guided Control of Excited‐State Deactivation through Modulation of Conical‐Intersection Accessibility by Donor–Acceptor Asymmetry in Bridged Stilbene AIE Luminogens

Advanced Science, EarlyView.
Donor–acceptor asymmetry modulates conical‐intersection accessibility and topology in bridged stilbenes, providing mechanistic insight into excited‐state deactivation and aggregation‐induced emission (AIE). ABSTRACT A computation‐guided investigation of asymmetric donor–acceptor bridged stilbenes reveals structure–property relationships governing ...
Takuya Tanaka, Satoshi Suzuki, Hirosato Koyanagi, Kiyoshi Miyata, Riki Iwai, Kazunobu Igawa, Ken Onda, Ben Zhong Tang, Gen‐ichi Konishi   +8 more
wiley   +1 more source

Entre o funcional e o lúdico: a camisinha nas campanhas de prevenção da aids

Interface: Comunicação, Saúde, Educação, 2000
Este trabalho parte da idéia da existência de impedimentos ao uso da camisinha. Abordou-se alguns desses impedimentos que são as significações marginais como a infidelidade e a promiscuidade que a camisinha encarna.
Mônica Benfica Marinho
doaj   +1 more source

Phase‐Resolved Dual Control of Phenol Photodissociation at the Air–Water Interface From Structure‐Resolved Statistics

Advanced Science, EarlyView.
Faster phenol photolysis at the air–water interface arises from two cooperative factors: a more favorable initial microenvironment for solvent‐side electron stabilization, which lowers CI access, and a more labile hydrogen‐bond network, which more readily reorganizes to stabilize the dark‐state intermediate.
Qiang Yin, Jialing Shi, Jinping Zhao, Chengjun Li, Yongbo Xie, Benkun Tan, Da Wang, Ziyun Wang, Yu Mao   +8 more
wiley   +1 more source

Multiscale Modelling of the Electrocatalysis of Microenzymes: Insights Into the Performance of Microperoxidase at an Aqueous/Graphene Interface and Their Exploitation to Improve Performance

Advanced Science, EarlyView.
A novel multiscale MD/DFT framework to elucidate microenzyme adsorption and electron transfer is reported. This method reveals distinct configurations for microperoxidase‐11 on graphene and those best suited for electron transfer. Rate constants align with the limited experimental data, establishing this framework as a tool for optimizing microenzyme ...
Milan Mijajlovic, Cheng Hu, Yuhui Sun, Matthew J. Penna, Meisam V. Kiamahalleh, Wenrong Yang, Mark J. Biggs   +6 more
wiley   +1 more source

Sexo y prevención: representaciones sociales del condón en adultos mexicanos

Horizonte Sanitario, 2019
Objetivo: Analizar las representaciones sociales del condón en adultos mexicanos. Material y métodos: Se llevó a cabo un estudio desde una perspectiva pluri metodológica, ya que se realizaron procedimientos cuantitativos y cualitativos con el apoyo
Oscar Alejandro Palacios Rodríguez, Teresa Margarita Torres López, Dulce María Galarza Tejada, Antonio de Jesús de la Cruz Villarreal   +3 more
doaj   +1 more source

Optimal Bandwidth in Semiconducting Polymer Chains

Advanced Electronic Materials, EarlyView.
Polymeric semiconductors have achieved improved mobility over the years while decreasing their bandwidth, a trend that clearly cannot continue indefinitely. This paper establishes the minimum bandwidth beyond which further band narrowing has a detrimental effect.
Suryoday Prodhan, Alessandro Troisi
wiley   +1 more source

Unpacking the Farmland Capitalization Effect of Ethanol Establishment

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT We unpack the impact of expansions in ethanol production—as measured by proximity to newly constructed ethanol plants and capacity expansions—on farmland values using land transaction data from Kansas in combination with modern causal inference techniques.
Gabriel S. Sampson, Jisang Yu
wiley   +1 more source

Salud sexual y reproductiva en población adolescente y adulta en México, 2022

Salud Pública de México, 2023
Objetivo. Caracterizar la situación de la salud sexual y reproductiva (SSR) en población adolescente (10-19) y adulta (20-49). Material y métodos. Utilizando la Encuesta Nacional de Salud y Nutrición 2022, se estimaron prevalencias e intervalos de ...
Celia Hubert López, Leticia Suárez-López, Elvia de la Vara-Salazar, Aremis Villalobos   +3 more
doaj   +1 more source