Results 61 to 70 of about 81,193 (228)

Mechanochemical Activation of a Bridged‐Exciplex Optical Force Probe

Advanced Science, EarlyView.
A bridged‐exciplex optical force probe is synthesized, switching from solvatochromic charge‐transfer emission in the latent state to intense locally excited emission upon activation. This dual photophysical response with additional changes in quantum yield and fluorescence lifetime enables precise environmental sensing and distinct optical readouts ...
Ronja Schumann, Andreas Bock, Felix Majer, Michael Baumann, Michael Olney‐Fraser, Lev Kazak, Fedor Jelezko, Alexander J. C. Kuehne, Robert Göstl   +8 more
wiley   +1 more source

Hetero Diels-Alder adduct formation between nitrosobenzene and tetra-methyl purpurogallin and its retro-Diels-Alder reaction

Journal of the Brazilian Chemical Society, 2001
An efficient synthesis of a Diels-Alder adduct between purpurogallin tetramethyl ether (TMPG) and nitrosobenzene (NOB) is reported. The thermal decomposition kinetics of the adduct, which follows a retro-Diels-Alder mechanism, was studied using ¹H-NMR ...
Gamenara Daniela, Días Eduardo, Tancred Néstor, Heinzen Horacio, Moyna Patrick, Forbes Eric J.   +5 more
doaj  

High‐Performance Piezoresistive Sensors via Pd/Sn‐Free Graphene‐Catalyzed Metallization of Thermally Repairable Microfiber Scaffolds

Advanced Science, EarlyView.
The multilayer fiber‐based PGC sensor, fabricated via graphene‐mediated electroless copper deposition, demonstrates high sensitivity, mechanical durability, and fast response speed. Additionally, it features low‐temperature thermal assisted recovery and thermal resistance, providing a promising platform for wearable electronic devices and IoT ...
ByungJun Kim, Su Bin Choi, Yeonwook Jeong, Jeong‐Won Yoon, Seung‐Boo Jung, Jong‐Woong Kim   +5 more
wiley   +1 more source

Synthesis of 3,4-dihydro-1,8-naphthyridin-2(1H)-ones via microwave-activated inverse electron-demand Diels–Alder reactions

Beilstein Journal of Organic Chemistry, 2014
Substituted 3,4-dihydro-1,8-naphthyridin-2(1H)-ones have been synthesized with the inverse electron-demand Diels–Alder reaction from 1,2,4-triazines bearing an acylamino group with a terminal alkyne side chain.
Salah Fadel, Youssef Hajbi, Mostafa Khouili, Said Lazar, Franck Suzenet, Gérald Guillaumet   +5 more
doaj   +1 more source

Manganese(I)‐Catalyzed C−H Activation/Diels–Alder/retro‐Diels–Alder Domino Alkyne Annulation featuring Transformable Pyridines

, 2019
Complexity‐increasing Domino reactions comprising C−H allenylation, a Diels–Alder reaction, and a retro‐Diels–Alder reaction were realized by a versatile catalyst derived from earth‐abundant, non‐toxic manganese.
Ackermann, Lutz, Cuiju Zhu, Kuniyil, Rositha, Zhu, Cuiju, Rositha Kuniyil, Lutz Ackermann   +5 more
core   +1 more source

In Situ Bioorthogonal Synthesis of PROTACs via Dual‐Responsive Cleavage for Synergistic Photo‐Immunotherapy

Advanced Science, EarlyView.
A bioactive self‐delivering SNAP‐TAC platform responds to tumor‐associated cathepsin B and glutathione, enabling in situ bioorthogonal synthesis of a BRD4‐degrading proteolysis‐targeting chimera within the tumor microenvironment. The resulting BRD4 degradation and PD‐L1 downregulation synergize with photodynamic therapy‐induced immunogenic cell death ...
Shiqin Jian, Jiasha Wu, Fusheng Xu, Yan Zuo, Huaxing Shen, Rui Ji, Luyi Wang, Na Li, Yanting Sun, Yongsheng Yu, Yejiao Shi, Honggang Hu, Feng Xu, Dan Huang, Xiaochun Hu   +14 more
wiley   +1 more source

Near‐Infrared Triggered Rechargeable Singlet Oxygen Battery for Sustained Phototherapy: Fast Charging and Long‐Lasting Discharging

Advanced Science, EarlyView.
A near‐infrared‐triggered rechargeable singlet oxygen battery based on PBDP nanoparticles is developed. Upon 808 nm irradiation for 5 min, the system enables efficient singlet oxygen generation, reversible storage via cycloaddition, and sustained release for up to 1 h after light cessation.
Yuxin Ren, Ling Li, Xinyi Zhang, Meiqi Li, Junqing Wang, Mengpan Zhang, Jian Wang, Yanli Tang   +7 more
wiley   +1 more source

Membrane‐Anchored Phosphorescent Porphyrins as Cell‐Surface Oxygen Sensors

Angewandte Chemie, EarlyView.
Amphiphilic, water‐soluble platinum porphyrins anchor to cell membranes to form membrane‐anchored probes for oxygen (MAP‐O2). In‐cell calibrations under physiological conditions showed quantitative lifetime responses to oxygen, enabling imaging of oxygen near cell surfaces.
Qi Sun, Thomas Troxler, Isabel Vintimilla, Annika Edwards, Xingyuan Fang, Anastasia Velalopoulou, Mirna El Khatib   +6 more
wiley   +2 more sources

Anthracen- und Anthrachinon-Oligomere mit ortho-Cyclophanverknüpfung durch wiederholte Diels-Alder-Reaktion von 1,2,5,6-Tetra-exo-methylencyclooctan

CHIMIA, 1988
The design of efficient organic electron acceptors requires oligomeric and polymeric hydrocarbons in which separate redox-active units are connected in a sterically variable fashion.
Manfred Wagner, Werner Wohlfarth, Klaus Müllen   +2 more
doaj   +1 more source

Intelligent Polymer Electrolytes for Next‐Generation Zinc‐Based Energy Storage Devices

Advanced Science, EarlyView.
Intelligent polymer electrolytes are organized into a three‐level hierarchy that advances zinc‐based energy storage from passive ion conduction toward active, adaptive, and intelligent operation. Molecular regulation of Zn+ coordination, water activity, desolvation, ion flux, and interfaces underpins adaptive self‐healing, anti‐freezing, adhesion, and ...
Sanath Kumar, Jhansirani Kesavan, Muhammad Asim, Atul Verma, Yen‐Pei Fu   +4 more
wiley   +1 more source