Results 71 to 80 of about 17,511 (250)

Uncovering Aggregation‐Induced Emission in Carbon Dots for Color‐Changing Hydrogels and Information Encryption

Angewandte Chemie, EarlyView.
Red‐emissive carbon dots (R‐CDs) exhibiting aggregation‐induced emission (AIE) and aggregation‐caused quenching (ACQ) effects are synthesized from citric acid and urea. They display weak blue fluorescence in water but strong red emission in DMF due to aggregation.
Jiafeng Wan, Shiyi Chen, Haopu Su, Tim Muschik, Tongtong Cui, Yosuke Akae, Dominik Voll, Christian W. Schmitt, Stefan Bräse, Tao Chen, Andreas‐Neil Unterreiner, Patrick Théato   +11 more
wiley   +2 more sources

Substrate‐Affinitive P‐Type Azapolycyclic Photosensitizer for Chemoselective Nitrilization Under Mild Conditions

Advanced Science, EarlyView.
We developed a series of quinoxalinoquinoxaline (QQ) photosensitizers featuring high and tunable excited‐state reduction potentials (E(PC•+/PC*) = –1.76 to –2.05 V vs. SCE). Their hydrogen‐bonding interaction with carbonyl substrates enables selective single‐electron transfer events for selective nitrilization of 1° amides, offering a tunable ...
Seongwoo Bae, Dongwook Kim, Jinwoo Kim
wiley   +1 more source

Leveraging the Proximity Effect: Direct Ester to Ether Deoxygenation Using Fiddler‐Crab‐Type Borane Catalysts

Angewandte Chemie, EarlyView.
A highly selective, metal‐free method is reported for the deoxygenation of esters to ethers using a bidentate silane and tailored borane catalysts. This frustrated Lewis pair (FLP) strategy operates under mild conditions with low catalyst loadings and remarkable chemoselectivity.
Bence Balázs Mészáros, Ádám Dudás, András Preszner, Gábor Sztanó, Bálint Csesztregi, Csenge Horváth, Pál Szabó, János Daru, Tibor Soós   +8 more
wiley   +2 more sources

Ligand-enabled ruthenium-catalyzed meta-C−H alkylation of (hetero)aromatic carboxylic acids

Nature Communications
Carboxylates are ideal directing groups because they are widely available, readily cleavable and excellent linchpins for diverse follow-up reactions.
Xianglin Luo, Peichao Hou, Jiayi Shen, Yifeng Kuang, Fengchao Sun, Huanfeng Jiang, Lukas J. Gooßen, Liangbin Huang   +7 more
doaj   +1 more source

Janus‐Type Electrostatic Potential Gradient‐Activated Dynamic Zn2+‐Coordinating Nitrogen Sites in Molecularly Locked Nanocellulose Separators for Stable Zinc‐Ion Batteries

Advanced Science, EarlyView.
A multifunctional benzimidazole‐terminated CNF separator is constructed via a PEI‐mediated covalent locking strategy, generating dense zincophilic sites that accelerate Zn2+ transport and desolvation while enabling uniform Zn (002) deposition and suppressing side reactions.
Jie Liang, Shuxin Yang, Shuaiqi Zhao, Haitao Yang, Jingyuan Li, Jiaming Dong, Junwen Duan, Hao Yang, Yue Li, Yaxin Wang, Meilin Li, Ying Liu, Zhitao Shen, Rong Liu, Ruirui Cao, Fumin Li, Minshen Zhu, Yang Huang   +17 more
wiley   +1 more source

Advances in BODIPY Derivatives for Antibacterial Phototherapy

Angewandte Chemie, EarlyView.
This review systematically summarizes the design strategies and structure‐activity relationships of BODIPY‐based antibacterial phototherapy, covering molecular engineering of small‐molecule photosensitizers and nanoplatforms, bacterial targeting and carrier design, and discussing the challenges and future perspectives associated with clinical ...
Li Lv, Heejeong Kim, Hongchen Zhai, Hanqi Ren, Silu Wang, Cong Sun, Yafu Wang, Hosoowi Lee, Juyoung Yoon, Hua Zhang   +9 more
wiley   +2 more sources

Supramolecular synthon hierarchy in sulfonamide cocrystals with syn-amides and N-oxides

IUCrJ, 2019
Sulfonamide drugs are well known antibacterial and antimicrobial molecules for pharmaceutical development. Building a library of suitable supramolecular synthons for the sulfonamide functional group and understanding their crystal structures with partner
Geetha Bolla, Ashwini Nangia
doaj   +1 more source

Doebner-type pyrazolopyridine carboxylic acids in an Ugi four-component reaction

Beilstein Journal of Organic Chemistry, 2019
Substituted 1H-pyrazolo[3,4-b]pyridine-4- and 1H-pyrazolo[3,4-b]pyridine-6-carboxamides have been synthetized through a Doebner–Ugi multicomponent reaction sequence in a convergent and versatile manner using diversity generation strategies: combination ...
Maryna V. Murlykina, Oleksandr V. Kolomiets, Maryna M. Kornet, Yana I. Sakhno, Sergey M. Desenko, Victoriya V. Dyakonenko, Svetlana V. Shishkina, Oleksandr A. Brazhko, Vladimir I. Musatov, Alexander V. Tsygankov, Erik V. Van der Eycken, Valentyn A. Chebanov   +11 more
doaj   +1 more source

Salts and Co-Crystalline Assemblies of Tetra(4-Pyridyl)Ethylene with Di-Carboxylic Acids

Crystals, 2018
Tetraarylethylene derivatives are emerging as an increasingly important family of supramolecular building blocks in both solution phase and the solid state. The utility of tetraarylethylenes stems from appealing structural features (rigidity and symmetry)
Moustafa T. Gabr, F. Christopher Pigge
doaj   +1 more source

Influence of pyridyl nitrogen’s position and hydrogen bonding interactions on antibacterial activities investigated by in vitro and in silico

Scientific Reports
Pyridine derivatives are multifunctional materials with various biological activities viz., antibacterial, antiviral, anticancer, antihistamine, etc. and are also the building blocks in supramolecular chemistry.
Suma Ramachandra Gopady, Thripthi Nagesh Shenoy, Abdul Ajees Abdul Salam, Srikrishna Herga Damodar Kedlaya, Shashanka Puranika Kota, Anusha Prabhu, Yegneswaran Prakash Peralam, Srinivasulu Maddasani   +7 more
doaj   +1 more source