Results 41 to 50 of about 415,539 (315)
1H-NMR based lipid profiling of Gossypium hirsutum seed oil at different developmental stages
Current Research in Green and Sustainable Chemistry, 2021 1H-NMR spectroscopy is emerging as powerful robust analytical technique in analyzing bio constituents present in plants. It offers non-invasive method for identification and quantification of several Phyto-constitutes in a single step without much pre ...
Nikita J. Kurkuri +3 more
doaj +1 more source
Solvent-Induced 1h Nmr Chemical Shifts of Annulenes
Computational and Theoretical Chemistry, 2023 We investigate the effect of solvent polarity on the 1H NMR chemical shifts of [n]annulenes (n = 12, 18, and 30) using density functional theory and corroborate the computational results with Onsager’s reaction field theory. We observe that there is a complete deshielding of the proton NMR chemical shifts for the outer protons and these shifts depend ...
Swrangsi Goyary +3 more
openaire +1 more source
Synthesis and structure of trans-1,2,3- tris(3-thenoyl)cyclopropane [PDF]
, 1994 The title cyclopropane derivative, C18H12O3S3, was synthesized and its structure investigated by single-crystal X-ray diffraction and spectroscopic methods.
Saba, Antonio
core
Study of cascade ring-closing metathesis reactions en route to an advanced intermediate of Taxol [PDF]
, 2016 A highly functionalized intermediate in the synthesis of Taxol has been synthesized, which features the tricyclic core and the required oxygen substituents at C1, C2, C7, C10 and C13. The key step, a ring-closing dienyne metathesis (RCDEYM) reaction, has
Letort, Aurélien +2 more
core +1 more source
Advanced Functional Materials, EarlyView.This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies +8 more
wiley +1 more source
Spectral Analysis of Glucose-Based Chiral N-heterocyclic Carbene Precursors
Chinese Journal of Magnetic Resonance, 2018 1-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-3-butylimidazolium bromide (compound 2) was synthesized with 1-bromobutane and 1-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl) imidazole (compound 1), which is a glucose-derived chiral N-heterocyclic carbene ...
ZHOU Zhong-gao +4 more
doaj +1 more source
Positive allosteric binding behavior of pyrene-appended triazole-modified thiacalix[4]arene-based fluorescent receptors [PDF]
, 2014 The novel heteroditopic receptors 5a∼c have been synthesized, which bear a thiacalix[4]arene in the 1,3-alternate conformation. Two urea moieties possessing various aryl groups with either electron-donating or -withdrawing groups at their p-positions ...
Ni, Xin-Long +5 more
core +2 more sources
Advanced Functional Materials, EarlyView.This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger +10 more
wiley +1 more source
A Wide-Line Solid-State 1H NMR Study of Phase Structures of Semi-Crystalline Polymers
Chinese Journal of Magnetic Resonance, 2019 Wide-line solid-state proton nuclear magnetic resonance (1H NMR) spectrometry is a classical technique to study the phase structures of semi-crystalline polymers.
WU Jin-ze +3 more
doaj +1 more source
Dinickel Bisphenoxyiminato Complexes for the Polymerization of Ethylene and α-Olefins [PDF]
, 2012 Dinuclear nickel phenoxyiminato olefin polymerization catalysts based on rigid p-terphenyl frameworks are reported. Permethylation of the central arene of the terphenyl unit and oxygen substitution of the peripheral rings ortho to the aryl–aryl linkages ...
Agapie, Theodor +2 more
core +1 more source