Results 31 to 40 of about 67,257 (300)

ESI-MS spectra of 3-cyano-4-(substituted phenyl)-6-phenyl-2(1H)-pyridinones [PDF]

Journal of the Serbian Chemical Society, 2009
Twelve 3-cyano-4-(substituted phenyl)-6-phenyl-2(1H)-pyridinones were investigated by tandem mass spectrometry using positive as well as negative electrospray ionization.
BRATISLAV Ž. JOVANOVIĆ, MILA D. LAUŠEVIĆ, TATJANA M. VASILJEVIĆ, ALEKSANDAR D. MARINKOVIĆ   +3 more
doaj   +3 more sources

A Hammett’s analysis of the Substituent Effect in Functionalized Diketopyrrolopyrrole (DPP) Systems: optoelectronic properties and intramolecular charge transfer effects

, 2023
Diketopyrrolopyrrole (DPP) systems have promising applications in different organic electronic devices. In this work, we investigated the effect of 20 distinct substituent groups on the optoelectronic properties of DPP-based derivatives as the donor (D ...
Gabriel, Monteiro-de-Castro, Itamar, Borges Jr.   +1 more
core   +1 more source

Substituent Effect Study for 13C SCS in a Meta-Styrene Series. Reynolds Dual Substituent Parameter Model Investigation

, 2021
This article investigates the transmission of the meta-substituent, X, effect to the carbon β (Cβ) of 17 different styrenes (X–C6H4–CHCYZ) using the literature 13C substituent chemical shift (SCS) of Cβ.
Basil A. Saleh (1973284), Ghazwan F. Fadhil (11377661), Sabih A. Al-Shawi (11377658), Basil A. Saleh, Sabih A. Al-Shawi, Ghazwan F. Fadhil   +5 more
core   +1 more source

Effect of substituent position on assembly of compounds bearing ortho/para over meta directing groups

Results in Chemistry
This research investigated the impact of substituent location on intermolecular interactions and crystal packing. A class of N-(dichlorophenyl)-2-pyrazincarboxamide derivatives were synthesized and characterized: 2,5-dichloro (2,5-diCl), 3,4-dichloro (3 ...
Vahid Amani, Fataneh Norouzi, Maryam Esmaeili, Hamid Reza Khavasi   +3 more
doaj   +1 more source

Rate and equilibrium constants for the addition of N-heterocyclic carbenes into benzaldehydes : a remarkable 2-substituent effect

, 2015
We thank the Royal Society for a University Research Fellowship (ADS), the EPSRC (CJC and RM) grant number EP/G013268/1 and the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013) ERC grant agreement no 279850
Collett, Christopher John, Taylor, James E., Massey, Richard S, Collett, C.J., Taylor, James Edward, Massey, R.S., Maguire, Oliver R, Smith, A.D., Collett, Christopher J., Taylor, J.E., Massey, Richard S., Smith, Andrew D., Smith, Andrewv D., O'Donoghue, Ann Marie C., O'Donoghue, A.C., O'Donoghue, AnnMarie C, Maguire, Oliver R.; id_orcid, Maguire, O.R.   +17 more
core   +1 more source

Electrode and Microstructure Dependence of Oxygen Diffusion in Ferroelectric Hafnium Zirconium Oxide Thin Films

Advanced Functional Materials, EarlyView.
Significant nanoscale oxygen diffusion coefficient variations are measured in ferroelectric hafnium zirconium oxide films with grain boundaries and electrode interfaces exhibiting values 104 times larger than the grain cores. Overall coefficients are 10X larger for films prepared with metal nitride electrodes compared to refractory metals. New insights
Liron Shvilberg, Thomas W. Pfeifer, Chuanzhen Zhou, Yong Kyu Choi, Duk‐Hyun Choe, Patrick E. Hopkins, Jon F. Ihlefeld   +6 more
wiley   +1 more source

Substituent Effects on the Photophysical Properties of a Series of 8(meso)-Pyridyl-BODIPYs: A Computational Analysis of the Experimental Data

Physchem
Recently, a series of 8(meso)-pyridyl-BODIPYs (2-pyridyl, 3-pyridyl, and 4-pyridyl) and their 2,6-substituted derivatives were synthesized and their structure and photophysical properties were studied both experimentally and computationally.
Petia Bobadova-Parvanova, Dylan Goliber, Elijuah Hernandez, Daniel LaMaster, Maria da Graça H. Vicente   +4 more
doaj   +1 more source

Insight into Spodium–π Bonding Characteristics of the MX₂⋯π (M = Zn, Cd and Hg; X = Cl, Br and I) Complexes—A Theoretical Study

Molecules, 2022
The spodium–π bonding between MX2 (M = Zn, Cd, and Hg; X = Cl, Br, and I) acting as a Lewis acid, and C2H2/C2H4 acting as a Lewis base was studied by ab initio calculations. Two types of structures of cross (T) and parallel (P) forms are obtained.
Meng Gao, Qibo Zhao, Hao Yu, Min Fu, Qingzhong Li   +4 more
doaj   +1 more source

Long‐Range Coordination Environment Modulates Single‐Atom Local States and Systemic Impact on CO2 Photoconversion

Advanced Functional Materials, EarlyView.
Terminal groups on Cu porphyrins modulate the electronic states of single‐atom Cu centers through a long‐range electronic effect, without altering the Cu coordination geometry. Meanwhile, a multi‐descriptor framework is established that incorporates porphyrin regulation, hybrid catalyst properties, and CO2 photoreduction capabilities.
Yi Zhang, Jintao Dong, Xiahe Chen, Xiyang Wang, Tiange Wei, Yue Zhu, Tai‐Sing Wu, Yun‐Fang Yang, Shao‐Yuan Leu, Keke Wang, Yuanbin She, Huaming Li, Jiexiang Xia, Molly Meng‐Jung Li   +13 more
wiley   +1 more source

Synthesis, properties and color assessment of some new 5-(3- and 4-substituted phenylazo)-4,6-dimethyl-3-cyano-2-pyridones [PDF]

Journal of the Serbian Chemical Society, 2006
A series of 5-(3- and 4-substituted phenylazo)-4,6-dimethyl-3-cyano-2-pyridones were synthesized, starting from acetylacetone and arenediazonium salt, followed by condensation with cyanoacetamide using a modified literature procedure.
Mijin Dušan, Ušćumlić Gordana, Perišić-Janjić Nada, Trkulja Ivan, Radetić Maja, Jovančić Petar   +5 more
doaj   +1 more source