Results 31 to 40 of about 363,660 (280)

High‐Efficiency Quantum Defect Generation in Carbon Nanotubes via Oxygen‐Free Photochemistry

Advanced Functional Materials, EarlyView.
We show that oxygen plays an important role in quantum defect formation in carbon nanotubes and identify reaction conditions to create a range of different quantum defects for photonics and biosensing. ABSTRACT Single‐walled carbon nanotubes (SWCNTs) offer potential for a wide range of applications from optoelectronic devices to biomedical diagnostics.
Christina Derichsweiler, Valeriia D. Andreeva, Jan Stegemann, Julia Ackermann, Janus A. C. Wartmann, Svenja Herbertz, Sebastian Kruss   +6 more
wiley   +1 more source

Solvent free synthesis, spectral correlation and antimicrobial activities of some 2E 4′-nitrochalcones

Journal of Saudi Chemical Society, 2016
A series containing twelve substituted styryl 4′-nitrophenyl ketones have been synthesized using solvent free SiO2–H2SO4 catalysed aldol reaction under microwave condition. The yield of chalcones is found to be more than 80%.
Renganathan Arulkumaran, Rajasekaran Sundararajan, Sambandamoorthy Vijayakumar, S. Palanivel Sakthinathan, Ramamoorthy Suresh, Dakshnamoorthy Kamalakkannan, Kaliyaperumal Ranganathan, Ganesan Vanangamudi, Ganesamoorthy Thirunarayanan   +8 more
doaj   +1 more source

Establishment of Steric Substituent Constants in the Adamantane System by ab Initio Calculations

, 2016
Steric substituent constants, SA, of both alkyl and aryl substituents were calculated in the adamantane system by both isodesmic reactions and ab initio calculations.
Fu-Lin Chen (3066768), Kuangsen Sung (1609747)   +1 more
core   +1 more source

Sigma Hole Potentials as Tools: Quantifying and Partitioning Substituent Effects [PDF]

, 2023
Empirical substituent constants such as the Hammett parameters have found important utility in organic and other areas of chemistry. They are useful both in predicting the impact of substitutions on chemical processes and in rationalizing, after the fact,
Donald, Kelling J., Pham, Nam, Ravichandran, Pranav   +2 more
core   +1 more source

Architected Bio‐Based Iontronic Skin With Dual‐Mode Pressure and Strain Sensing

Advanced Functional Materials, EarlyView.
Bio‐based acrylates in combination with an ionic liquid create 3D‐printed ionogels with compositionally tuneable mechanics and ionic conductivity. Gyroid architectures amplify low‐pressure sensitivity while preserving robust strain sensing, enabling dual‐mode detection of pressure and deformation.
Maksims Jurinovs, Madara Veseta, Fevzihan Basarir, Beatrise Silava, Eduards Bakis, Krisjanis Smits, Olesja Starkova, Jaana Vapaavuori, Sergejs Gaidukovs   +8 more
wiley   +1 more source

Dependence of tautomerism on substituent type in o-hydroxy Schiff bases

Macedonian Journal of Chemistry and Chemical Engineering, 2019
Quantum computational methods were used to elucidate the structures of the o-hydroxy Schiff bases with different substituents. It is possible for a Schiff base to have different tautomeric structures depending on intramolecular proton transfer from the ...
Çiğdem Albayrak Kaştaş, Gökhan Kaştaş   +1 more
doaj   +1 more source

Single‐Chromophore Homojunction Organic Solar Cells: A Path to Simplicity and Efficiency

Advanced Materials, EarlyView.
This perspective discusses how the intrinsic optoelectronic properties of organic semiconductors, their molecular packing in the solid‐state, and internal energetic gradients within a device can enable free‐charge carrier generation in homojunction organic solar cells.
Shaun McAnally, Paul L. Burn, Paul E. Shaw   +2 more
wiley   +1 more source

Substituent effects in 1,3-indanediones

, 1982
The carbonyl stretching frequencies correlate well with substituent constants in a series of 166 1,3-indanediones using improved and extended Seth-Paul-Van Duyse equation.
Alexander Perjéssy
core   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

CONFORMATIONAL AND SUBSTITUENT DEPENDENCE OF NMR COUPLING CONSTANTS.

, 1982
Indirect nuclear spin-spin coupling constants in high resolution nuclear magnetic resonance (NMR) spectroscopy provide the most powerful method for determining conformations and structures of molecules in solution.
WALTER, STEVEN ROY.
core   +4 more sources