Results 21 to 30 of about 856,718 (308)

Analytical Formulas of Molecular Ion Abundances and N2H+ Ring in Protoplanetary Disks [PDF]

open access: yes, 2015
We investigate the chemistry of ion molecules in protoplanetary disks, motivated by the detection of N$_2$H$^+$ ring around TW Hya. While the ring inner radius coincides with the CO snow line, it is not apparent why N$_2$H$^+$ is abundant outside the CO ...
Aikawa, Yuri   +3 more
core   +3 more sources

A user-friendly Matlab program and GUI for the pseudorotation analysis of saturated five-membered ring systems based on scalar coupling constants [PDF]

open access: yes, 2008
Background: The advent of combinatorial chemistry has revived the interest in five-membered heterocyclic rings as scaffolds in pharmaceutical research. They are also the target of modifications in nucleic acid chemistry.
Hendrickx, Pieter, Martins, José
core   +4 more sources

Assessing the Effect of Stabilization and Carbonization Temperatures on Electrochemical Performance of Electrospun Carbon Nanofibers from Polyacrylonitrile

open access: yesAdvanced Energy & Sustainability Research, 2023
Supercapacitors (SCs) are considered a promising alternative to batteries to power up portable and wearable devices. Among different categories of materials for SCs, carbon nanofibers (CNFs) are particularly appealing for their electrochemical ...
Felix Boll   +5 more
doaj   +1 more source

Use of metal catalysts bearing Schiff base macrocycles for the ring opening polymerization (ROP) of cyclic esters [PDF]

open access: yes, 2017
© 2017 by the authors. Schiff base macrocycles are emerging as useful scaffolds for binding two or more catalytic metals in close proximity. Such coordination chemistry allows for the evaluation of potentially beneficial catalytic cooperative effects. In
Redshaw, Carl
core   +2 more sources

A Farewell Symposium to the Retiring Professors Catherine E. Housecroft and Edwin C. Constable

open access: yesCHIMIA, 2023
On the 5th of May 2023, the Department of Chemistry at the University of Basel celebrated the careers of their long-term colleagues Catherine E. Housecroft and Edwin C. Constable with a farewell symposium. Seven former coworkers and current colleagues of
Murielle F. Delley, Oliver S. Wenger
doaj   +1 more source

Straightforward synthesis of functionalized cyclic polymers in high yield via RAFT and thiolactone-disulfide chemistry [PDF]

open access: yes, 2013
An efficient synthetic pathway toward cyclic polymers based on the combination of thiolactone and disulfide chemistry has been developed. First, heterotelechelic linear polystyrene (PS) containing an alpha-thiolactone (TLa) and an omega-dithiobenzoate ...
Baba, Eisuke   +5 more
core   +1 more source

An air-stable bisboron complex: a practical bidentate Lewis acid catalyst

open access: yesBeilstein Journal of Organic Chemistry, 2018
We report an air-stable bisboron complex as an efficient catalyst for the inverse electron-demand Diels–Alder (IEDDA) reaction of 1,2-diazine as well as 1,2,4,5-tetrazine.
Longcheng Hong   +7 more
doaj   +1 more source

Organic molecules in the protoplanetary disk of DG Tau revealed by ALMA [PDF]

open access: yes, 2019
Planets form in protoplanetary disks and inherit their chemical compositions. It is thus crucial to map the distribution and investigate the formation of simple organics, such as formaldehyde and methanol, in protoplanetary disks.
Bacciotti, F.   +12 more
core   +5 more sources

NeoPHOX – a structurally tunable ligand system for asymmetric catalysis

open access: yesBeilstein Journal of Organic Chemistry, 2016
A synthesis of new NeoPHOX ligands derived from serine or threonine has been developed. The central intermediate is a NeoPHOX derivative bearing a methoxycarbonyl group at the stereogenic center next to the oxazoline N atom.
Jaroslav Padevět   +3 more
doaj   +1 more source

Activated Cyclopropanes: A Remarkable Breadth of Recent Chemistry [PDF]

open access: yes, 2014
The reactions of cyclopropanes activated by electron-withdrawing groups and electron-donating groups – donor–acceptor (DA) cyclopropanes – and with alkenyl or alkylidene substituents has been an area of recent intense research activity.
Green, James R, Snieckus, Victor
core   +3 more sources

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