Results 131 to 140 of about 20,876 (282)

Probing Metal Tip‐Induced Bond Weakening of a Reactive Alkyne Center Aligned via a Rigid Triphenylmethane‐Based Tripod on Au(111) by TERS and DFT

Journal of Raman Spectroscopy, EarlyView.
We investigate tip‐induced bond weakening of a single alkyne center immobilized and aligned upright on Au(111) using a rigid triphenylmethane‐based tripod. By varying the tip–molecule distance, we observe shifts in the ≡C–H and –C≡C– vibrational bands via ultrahigh vacuum low‐temperature tip‐enhanced Raman scattering (TERS).
Gang Li, Simon Mennicken, Lu‐Yao Zhu, Sadaf Ehtesabi, Till Reichenauer, Stephan Kupfer, Daniel Schäfer, Saber Mehrparvar, Gebhard Haberhauer, Yao Zhang, Stefanie Gräfe, Sebastian Schlücker, Zhen‐Chao Dong   +12 more
wiley   +1 more source

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, EarlyView.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source

Nitroxide‐Mediated Polymerization Synthesis of Geminal Bisphosphonate‐Functionalized (Co)polymers and Their Affinity to Hydroxyapatite Surface

Journal of Polymer Science, EarlyView.
A novel styrenic monomer bearing gem‐bisphosphonate groups is synthesized in a single step. The nitroxide‐mediated (co)polymerization of this monomer proceeds in a well‐controlled manner, yielding bisphosphonate‐functionalized (co)polymers with low dispersity.
Hien The Ho, Nam Hoai Nguyen, Marion Rollet, Didier Gigmes, Trang N. T. Phan   +4 more
wiley   +1 more source

Evaluation of a High‐Performance Monopropellant Formed of Microencapsulated Hydrocarbon Fuels in Combination With Gelled Hydrogen Peroxide in a Strand Burner Setup

Propellants, Explosives, Pyrotechnics, EarlyView.
A high‐performance premixed monopropellant is prepared from hydrocarbon‐filled microcapsules and hydrogen peroxide. This propellant is burned in a strand burner, and the effect of different parameters on the burn rate is evaluated. ABSTRACT A dispersion of hydrocarbon‐fuel‐filled microcapsules in gelled hydrogen peroxide can form a premixed ...
Robin Scholl, Felicitas S. Moll, Dominic Freudenmann, Stefan Schlechtriem   +3 more
wiley   +1 more source

Anode‐Free Cell Concepts: Critical Analysis and Development of Practical Batteries

Small, EarlyView.
Anode‐free batteries (AFBs) are considered one of the most promising battery technologies due to their potential advantages in terms of energy density, manufacturing ease, and sustainability. This Perspective article provides a comprehensive overview of the latest advances in AFBs with liquid and solid electrolytes, a critical analysis of cell ...
Svetlana Menkin, Elixabete Ayerbe, Anna B. Gunnarsdóttir, Diego del Olmo, Pedro López‐Aranguren, Amna Rafique, Jokin Rikarte, Susana Chauque, Xiaorui Shi, Olivier Guillon, Robert Dominko, Philipp Schlee, Martin Finsterbusch, Andriy Kvasha, Dina Fattakhova‐Rohlfing   +14 more
wiley   +1 more source

Matrix‐Isolation Electron Paramagnetic Resonance Studies of Radical Ions and Neutral Radicals Generated by Radiolysis of Organic Molecules at Cryogenic Temperatures

The Chemical Record, EarlyView.
By selecting an appropriate matrix and irradiating the matrix containing a trace amount of solute at low temperatures, ionic or neutral radicals derived from the solute can be generated and trapped in the matrix. EPR spectroscopy of these samples yields highly detailed information on the radicals, inaccessible by other experimental techniques. Electron
Kenji Komaguchi
wiley   +1 more source

Metal‐Free Electrophilic Borylative Cyclizations of Alkynes

The Chemical Record, EarlyView.
Metal‐free borylative cyclizations based on electrophilic alkyne activation by boron Lewis acids provide efficient access to borylated hetero‐ and carbocycles. Early studies using B(C6F5)3 displayed limited scope and application, whereas recent ClBcat‐ and BCl3‐based methods enable mild CB and CC/CX bond formation for the synthesis of cycles ...
Jaime Mateos‐Gil, Marcos Humanes, Manuel A. Fernández‐Rodríguez, Patricia García‐García   +3 more
wiley   +1 more source

Correction to "Synthesis of Bicyclo[2.1.0]pentanes and Vinylcyclopropanes Using Palladium Carbenes: Ligand-Controlled Carbene Reactivity". [PDF]

J Am Chem Soc
Eckart-Frank IK, Arnold ES, Murphy LP, Wilkerson-Hill SM.   +3 more
europepmc   +1 more source

Natural Gas Supplies for Tomorrow [PDF]

, 1954
Baker, Rex G., Illig, Carl
core   +2 more sources

Enzymatic synthesis of bioactive quinolones and (thio)coumarins by fungal type III polyketide synthases

The FEBS Journal, EarlyView.
Quinolones are valuable scaffolds for drug discovery but are rare in nature. Here, we show that two fungal enzymes, AthePKS and FerePKS, can generate 2‐quinolones and two additional heteroaromatic scaffolds. Using AthePKS, we designed an artificial enzymatic cascade towards an antimicrobial quinolone from a simple precursor and implemented it in E ...
Nika Sokolova, Angelina Osipyan, Lili Zhang, Matthew R. Groves, Sandy Schmidt, Kristina Haslinger   +5 more
wiley   +1 more source