Pyridine <i>N</i>-Oxides as Ligands in Cu-Catalyzed <i>N</i>-Arylation of Imidazoles in Water

N-Arylation of imidazoles with aryl halides catalyzed by a combination of copper(II) sulfate and 1,2-bis(2-pyridyl)-ethane-N,N′-dioxide in water afforded up to 95% yield

Assembly of 1,3,5-tris(2-alkylthiol-pyrimidin-4-yl)benzene) (alkyl = Me, n-Pr) with copper(I) iodide: effect of alkyl side chain

<div><p>Two <i>π</i>-conjugated organic building blocks, <b>TMPB</b> and <b>TPPB</b> (<b>TMPB</b> = 1,3,5-tris(2-methylthiol-pyrimidin-4-yl)benzene; <b>TPPB</b> = 1,3,5-tris(2-propylthiol-pyrimidin-4-yl)benzene), have been prepared which only differ in the length of linear side chain attached to sulfur. Structural comparison between complexes of <b>TMPB</b> and <b>TPPB</b> reveals that the side chain has a great effect in modulating both the molecular structure and the molecular alignment. Reactions of <b>TMPB</b> and <b>TPPB</b> with CuI under the same conditions show that the side chain can exert impact on the assembly of coordination polymer. Assembly reaction with CuI is sensitive to the change in length of side chain, that is the shorter the side chain, the faster the reaction. Reaction of <b>TPPB</b> with CuI gives a 1-D chain structure of [Cu₄I₄(<b>TPPB</b>)₂]_n (<b>1</b>) based on two distinctive Cu₄I₄ clusters, whilst only microcrystalline powder or precipitate can be obtained for <b>TMPB</b>. The side chain can, thus, tune the assembly of coordination polymer in terms of the assembly structure as well as its packing manner.</p></div

Pyridine <i>N</i>-Oxides as Ligands in Cu-Catalyzed <i>N</i>-Arylation of Imidazoles in Water

N-Arylation of imidazoles with aryl halides catalyzed by a combination of copper(II) sulfate and 1,2-bis(2-pyridyl)-ethane-N,N′-dioxide in water afforded up to 95% yield

Pyridine <i>N</i>-Oxides as Ligands in Cu-Catalyzed <i>N</i>-Arylation of Imidazoles in Water

N-Arylation of imidazoles with aryl halides catalyzed by a combination of copper(II) sulfate and 1,2-bis(2-pyridyl)-ethane-N,N′-dioxide in water afforded up to 95% yield

Accuracy assessment of 2017 binary classification and multi-classification result (OA(Overall accuracy), PA(Producer accuracy), UA(User accuracy), ML(Maximum likelihood)).

Accuracy assessment of 2017 binary classification and multi-classification result (OA(Overall accuracy), PA(Producer accuracy), UA(User accuracy), ML(Maximum likelihood)).</p

Tea extraction result.

The base map of the LandSat8 OLI images with the following composition:R (4),G (3) and B (2). The LandSat8 OLI images were downloaded from USGS National Map Viewer.</p

2014–2017 Tea extraction result.

(ZIP)</p

Extraction results in (a)2014 (b)2015 and (c)2016.

The base map of the LandSat8 OLI images with the following composition:R (4),G (3) and B (2). The LandSat8 OLI images were downloaded from USGS National Map Viewer.</p

Tea plantation area changes during 2014–2017.

Tea plantation area changes during 2014–2017.</p