Results 51 to 60 of about 197,798 (287)

Theoretical Study on Highly Active Bifunctional Metalloporphyrin Catalysts for the Coupling Reaction of Epoxides with Carbon Dioxide [PDF]

, 2016
Highly active bifunctional metalloporphyrin catalysts were developed for the coupling reaction of epoxides with CO2 to produce cyclic carbonates. The bifunctional catalysts have both quaternary ammonium halide groups and a metal center.
Ahmadi, Aida, Becke, Castro-Gómez, Chen, Chen, Cokoja, Cokoja, Comerford, D'Elia, Darensbourg, Ema, Ema, Ema, Foltran, Jin, Kielland, Kruper, Lee, Li, Li, Liu, Ma, Maeda, Maeda, Maeda, Martín, Paddock, Qin, Reed, Reed, Rocha, Stewart, Sun, Tlili, Tomasi, Tsuji, Wang, Wang, Wang, Whiteoak, Whiteoak   +41 more
core   +1 more source

Photon Avalanching Nanoparticles: The Next Generation of Upconverting Nanomaterials?

Advanced Functional Materials, EarlyView.
This Perspective outlines the mechanistic foundations that enable photon‐avalanche (PA) behavior in lanthanide nanomaterials and contrasts them with emerging application spaces and forward‐looking design strategies. By bridging threshold engineering, energy‐transfer dynamics, and materials engineering, we provide a coherent roadmap for advancing the ...
Kimoon Lee, Yunseo Kim, Hyeong‐ku Jo, Dongjoon Yoon, Byeonghyeok Im, WonJeong Yu, Eui‐Rim On, Changhwan Lee   +7 more
wiley   +1 more source

Fire extinguishant materials [PDF]

, 1983
Fire extinguishant composition comprising a mixture of a finely divided aluminum compound and alkali metal, stannous or plumbous halide is provided. Aluminum compound may be aluminum hydroxide, alumina or boehmite but preferably it is an alkali metal ...
Altman, R. L., Ling, A. C., Mayer, L. A.
core   +1 more source

Meniscus Pixel Printing for Contact‐Lens Vision Sensing and Robotic Control

Advanced Functional Materials, EarlyView.
A visual‐sensing contact lens is enabled by meniscus pixel printing (MPP), which rapidly patterns a 200 µm perovskite photodetector pixel in 1 s without masks, vacuum processing, or bulky equipment. A deep‐learning‐based super‐resolution reconstructs sparse on‐lens signals into 80 × 80 high‐resolution visual information, while AI‐driven eye‐tracking ...
Byung‐Hoon Gong, Dohyean Kim, Jiyun Jeong, Taekyeong Kim, Soon‐sung Kwon, Junyoung Seo, Il Jeon, Im Doo Jung   +7 more
wiley   +1 more source

Recent Progress in Electrochemiluminescence of Halide Perovskites

Frontiers in Chemistry, 2021
Halide perovskites are a rapidly developing class of solution-processable semiconductors which, to date, have a huge impact across several scientific communities. The remarkable photophysical attributes of halide perovskites illustrate their considerable
Yue Cao, Jun-Jie Zhu
doaj   +1 more source

Charge-Transfer Bonding in Metal–Arene Coordination [PDF]

, 2000
X-ray crystallographic structures of donor–acceptor complexes of aromatic hydrocarbons with transition metals are re-examined with the focus on the arene ligands. Thus, significant structural and electronic changes are revealed in the arene moiety due to
Hubig, S. M., Kochi, Jay K., Lindeman, Sergey V.   +2 more
core   +1 more source

Spontaneous Octahedral Tilting in the Cubic Inorganic Caesium Halide Perovskites CsSnX$_3$ and CsPbX$_3$ (X = F, Cl, Br, I)

, 2017
The local crystal structures of many perovskite-structured materials deviate from the average space group symmetry. We demonstrate, from lattice-dynamics calculations based on quantum chemical force constants, that all the caesium-lead and caesium-tin ...
da Silva, E. Lora, Frost, Jarvist M., Skelton, Jonathan M., Walsh, Aron, Yang, Ruo Xi   +4 more
core   +1 more source

Ruddlesden-Popper Phase in Two-Dimensional Inorganic Halide Perovskites: A Plausible Model and the Supporting Observations. [PDF]

, 2017
A Ruddlesden-Popper (RP) type structure is well-known in oxide perovskites and is related to many interesting properties such as superconductivity and ferroelectricity.
Yang, Peidong, Yu, Yi, Zhang, Dandan
core   +1 more source

Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films

Advanced Functional Materials, EarlyView.
Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee, Yun‐Tae Kim, Hwarang Choi, Sanghwan Park, Seongyeop Lim, Chang Young Lee   +5 more
wiley   +1 more source

Enhanced photochemical formation of active nitrogen species from aqueous nitrate in the presence of halide ions

Frontiers in Environmental Science
Field observations have confirmed that halide ions are widely distributed among aerosols from the marine boundary layer and on the surfaces of ice and snow in polar regions. Consequently, the coexistence of halide ions may play a more significant role in
Yilong Zhao, Yilong Zhao, Chengwei Liu, Xiang Tu, Wenkai Huang, Yu Liu, Hongbo Fu, Hongbo Fu, Hongbo Fu   +8 more
doaj   +1 more source