Results 111 to 120 of about 80,380 (385)

Sonogashira cross-couplings of dehydroamino acid derivatives and phenylacetylenes [PDF]

, 2004
Several phenylacetylenes were coupled under Sonogashira cross coupling conditions with the methyl esters of N-(tert-butoxycarbonyl)-(E)-beta-bromo or beta, beta-dibromodehydroalanine to give respectively beta-substituted or beta,beta-bis-substituted ...
Abreu, Ana S., Ferreira, Paula M. T., Gatto, Emanuela, Queiroz, Maria João R. P., Venanzi, Mariano   +4 more
core   +1 more source

Stabilizing Cationic Palladium Single‐Atom Sites on Heteroatom‐Doped Carbon for Selective Hydrogen Peroxide Electrosynthesis

Advanced Functional Materials, EarlyView.
In this research, it is demonstrated that dual nitrogen and sulfur doping in hollow carbon spheres creates a tunable coordination environment that stabilizes cationic Pd single atoms as robust organometallic complexes, enabling high selectivity and stability for electrochemical hydrogen peroxide production under harsh acidic and peroxide‐rich ...
Guilherme V. Fortunato, Alexander Gunnarson, Hannaneh Hosseini, Xiangyu You, Pallabi Bhuyan, Ji Sik Choi, Hyo Sang Jeon, Xingshen Zhao, Julio C. Lourenço, Sumin Lim, Huize Wang, Ana Guilherme Buzanich, Martin Radtke, Paul Paciok, Marcos R.V. Lanza, Ferdi Schüth, Marc Ledendecker   +16 more
wiley   +1 more source

Anomalous Stiffening of a Conjugated Polymer During Electrochemical Oxidation

Advanced Functional Materials, EarlyView.
The electromechanical response of a thienothiophene‐based conjugated polymer with triethylene glycol side chains is investigated. Electrochemical nanoindentation and atomic force microscopy reveal a modest and reversible increase in elastic modulus at room temperature upon electrochemical oxidation.
Judith Pons i Tarrés, Di Zhu, Chiara Musumeci, Youngseok Kim, Dilara Meli, Hang Yu, Meghna Jha, Bryan D. Paulsen, Ruiheng Wu, Joost Kimpel, Zachary Laswick, Sri Harish Kumar Paleti, Yadong Zhang, Stephen Barlow, Seth R. Marder, Jenny Nelson, Jonathan Rivnay, Christian Müller   +17 more
wiley   +1 more source

Synthesis of Novel Derivatives of Carbazole-Thiophene, Their Electronic Properties, and Computational Studies

Journal of Chemistry, 2016
A series of carbazole-thiophene dimers, P1–P9, were synthesized using Suzuki-Miyaura and Ullmann coupling reactions. In P1–P9, carbazole-thiophenes were linked at the N-9 position for different core groups via biphenyl, dimethylbiphenyl, and phenyl ...
E. F. Damit, N. Nordin, A. Ariffin, K. Sulaiman   +3 more
doaj   +1 more source

Ein einfaches Verfahren zur Herstellung anellierter Thiophene [PDF]

, 1986
A simple method for the synthesis of fused thiophenes by reaction of agr-carboxymethyl substituted cyclic ketones withLawesson-reagent is described.
A. Ricci, B. S. Pedersen, B. S. Pedersen, B. S. Pedersen, C. R. Noe, C. R. Noe, Christian R. Noe, D. W. H. MacDowell, Ernst Wagner, L. Pitarch, M. J. Gula, Max Knollm�ller, N. W. Fadnavis, P. Cagniant, S. Gronowitz, S. Scheibye, S. Scheibye, T. Severin, T. Sotoyama, W. Langenbeck   +19 more
core   +1 more source

Structural Control of Photoconductivity in a Flexible Titanium‐Organic Framework

Advanced Materials, EarlyView.
The concept of flexibility is extended to titanium frameworks and use it to gain control over charge transport. MUV‐35 is a flexible doubly interpenetrated framework that can shrink spontaneously its volume by ≈40% to afford a photoconductive, porous state that is thermodynamically favored by non‐covalent interactions. Abstract The soft nature of Metal‐
Clara Chinchilla‐Garzón, Marta Galbiati, Alechania Misturini, Pol Gimeno‐Fonquernie, Neyvis Almora‐Barrios, Natalia M. Padial, Carlos Martí‐Gastaldo   +6 more
wiley   +1 more source

One-pot sequential synthesis of tetrasubstituted thiophenes via sulfur ylide-like intermediates

Beilstein Journal of Organic Chemistry, 2018
Herein, we describe a novel approach for the practical synthesis of tetrasubstituted thiophenes 8. The developed method was particularly used for the facile preparation of thienyl heterocycles 8.
Jun Ki Kim, Hwan Jung Lim, Kyung Chae Jeong, Seong Jun Park   +3 more
doaj   +1 more source

Identification of Larvicidal Constituents of the  Essential Oil of Echinops grijsii Roots against the  Three Species of Mosquitoes

Molecules, 2017
The screening of Chinese medicinal herbs for insecticidal principles showed that the essential oil of Echinops grijsii Hance roots possessed significant larvicidal activity against mosquitoes.
Mei Ping Zhao, Qi Zhi Liu, Qiyong Liu, Zhi Long Liu   +3 more
doaj   +1 more source

Covalent Organic Frameworks for Photocatalysis

Advanced Materials, EarlyView.
This review provides an overview of recent advances in covalent organic frameworks (COFs) for photocatalysis, focusing on sustainable energy applications like water splitting, hydrogen peroxide generation, and CO2 and N2 reduction. It discusses design principles, structure‐function relationships, challenges in COF photocatalysis, and strategies to ...
Bikash Mishra, Akhtar Alam, Avanti Chakraborty, Bidhan Kumbhakar, Samrat Ghosh, Pradip Pachfule, Arne Thomas   +6 more
wiley   +1 more source

Identification of Trace Organic Components in the CR Chondrites by 4D TOFMS [PDF]

, 2007
This paper reports preliminary results of a 4D TOFMS study of CR chondrite organic material, highlighting the low-level organic species that may further reveal the complexity of parent body modification of interstellar ...
Gilmour, I., Morgan, G. H., Pearson, V. K., Perronnet, M., Turner, D.   +4 more
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