Results 61 to 70 of about 76,906 (304)

Snow-sourced bromine and its implications for polar tropospheric ozone [PDF]

Atmospheric Chemistry and Physics, 2010
In the last two decades, significant depletion of boundary layer ozone (ozone depletion events, ODEs) has been observed in both Arctic and Antarctic spring. ODEs are attributed to catalytic destruction by bromine radicals (Br plus BrO), especially during
X. Yang, J. A. Pyle, R. A. Cox, N. Theys, M. Van Roozendael   +4 more
doaj   +1 more source

Tough and Skin‐Free Porous Polyelectrolyte Complex Hydrogels via Salt‐Induced Aqueous Phase Separation

Advanced Functional Materials, EarlyView.
Controlling counterion exchange rate during aqueous phase separation enables the formation of skin‐free, homogeneously porous polyelectrolyte complex hydrogels by suppressing kinetically trapped skin layers and macrovoids. The resulting hydrogel networks exhibit exceptional toughness (∼15 MJ·m−3) and enable 3D (bio)printing and post‐functionalization ...
Adrivit Mukherjee, Vishakha Vishakha, Julien Es Sayed, Hugo Brummer, Peter Dijkstra, Ajay Giri Prakash Kottapalli, Ranjita K. Bose, Marleen Kamperman   +7 more
wiley   +1 more source

Multifunctional Solid Polymer Electrolyte Films Integrating Intrinsic Self‐Healing and Dual Photo‐/pH‐Responsive Ionic Sensing for Intelligent Flexible Electronics

Advanced Functional Materials, EarlyView.
Multifunctional solid polymer electrolyte (SPE) films integrating intrinsic self‐healing, mechanical stretchability, and dual photo‐ and pH‐responsive ionic conductivity are developed. Constructed from thermoplastic polyurethane (TPU) and hydrogen‐bonded poly(thiourea triethylene glycol) (PTUEG3), these films form a dynamic supramolecular network ...
Mei‐Li Li, Tse‐Yu Lo, Chia‐Wei Chang, Yen‐Shen Hsu, Chen‐Yi Chien, Yu‐Yao Huang, Chia‐Ti Wu, Chun‐Chi Chang, Bo‐Chen Chen, Heng‐Hsuan Su, Chin‐Hua Liu, Che‐Ning Yeh, Jiun‐Tai Chen   +12 more
wiley   +1 more source

Intrinsic Interfacial Energy Alignment Enables ETL‐Free Organic Solar Cells

Advanced Functional Materials, EarlyView.
Molecular orientation of the small‐molecule donor BTR‐Cl induces a vacuum‐level shift that pins the Fermi level at ∼4.4 eV at the active layer/Ag interface, enabling Ohmic contact formation without an electron transport layer. This strategy is extended to ternary PM6:Y6:BTR‐Cl devices, achieving an ETL‐free efficiency of 18.6% with enhanced operational
Heng Liu, Yuang Fu, Cangyu Wang, Luhang Xu, Xian‐Kai Chen, Man Chung Tang, Xinhui Lu   +6 more
wiley   +1 more source

Molecular Beam Scattering Experiments as a Sensitive Probe of the Interaction in Bromine–Noble Gas Complexes

Frontiers in Chemistry, 2019
This paper reports for the first time molecular beam experiments for the scattering of He, Ne, and Ar by the Br2 molecule, with the aim of probing in detail the intermolecular interaction. Measurements have been performed under the experimental condition
David Cappelletti, Antonio Cinti, Andrea Nicoziani, Stefano Falcinelli, Fernando Pirani   +4 more
doaj   +1 more source

Sulfur‐Free Ultrahigh‐Refractive‐Index Polymers Enabled by Densely Packed Oxygen‐Bridged Dibenzofuran‐Cardo Architectures

Advanced Functional Materials, EarlyView.
A new class of sulfur‐free, oxygen‐bridged dibenzofuran‐based polymers is developed for ultrahigh‐refractive‐index applications. The rigid π‐extended architecture and enhanced molecular polarizability enable exceptional optical performance, combining refractive indices up to 1.848 with high Abbe numbers and full visible transparency. This work offers a
Hend A. Hegazy, Gyeongsoo Kim, Sooyoung Lee, Mohamed R. Elmasry, Youn‐Chul Kim, Changsik Song   +5 more
wiley   +1 more source

(1R*,2R*,5R*,6S*)-6-Bromo-9-oxabicyclo[3.3.1]nonan-2-ol

IUCrData
Both six-membered rings in the title bicyclo[3.3.1] system, C8H13BrO2, adopt a chair conformation. Hydrogen bonds from the hydroxy group to the ether bridge connect the molecules into zigzag chains: single-enantiomer chains propagating along the b-axis ...
Lea Simon, Heiner Detert, Dieter Schollmeyer   +2 more
doaj   +1 more source

Snowpack measurements suggest role for multi-year sea ice regions in Arctic atmospheric bromine and chlorine chemistry.

Elementa, 2019
As sources of reactive halogens, snowpacks in sea ice regions control the oxidative capacity of the Arctic atmosphere. However, measurements of snowpack halide concentrations remain sparse, particularly in the high Arctic, limiting our understanding of ...
P. Peterson, M. Hartwig, N. May, E. Schwartz, I. Rigor, W. Ermold, M. Steele, J. Morison, S. Nghiem, K. Pratt   +9 more
semanticscholar   +1 more source

Make‐Use‐Remake: Toward Indefinite Low‐Temperature Material Loops

Advanced Functional Materials, EarlyView.
We introduce a regenerable materials platform built from microparticles bound by a temperature‐responsive polymer shell, enabling strong, processable structures from diverse feedstocks. The material is shaped at low temperatures (80°C) using common manufacturing methods and reprocessed repeatedly in the presence of water, demonstrating stable ...
Nikola Křivánková, Wouter van der Wijngaart, Ulrica Edlund   +2 more
wiley   +1 more source

Hydrogeological uniqueness of groundwater in the Cherkashinsky area of the Tobolsk district of the Tyumen region

Известия высших учебных заведений: Нефть и газ
Intensive development of the Tyumen region, where the largest West Siberian megabasin is located (the Tyumen groundwater deposit is the largest in Russia), violates the natural state of ecosystems, in particular groundwater, which is the basis of an ...
A. S. Aleksandrov, V. A. Beshentsev
doaj   +1 more source