Cuijingjing680

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05 Apr 06:30

Remarkable Magnetic Coupling Interactions in Multi-Beryllium-Expanded Small Graphene-like Molecules with Well-Defined Polyradical Characters

by Meiyu Song, Xinyu Song and Yuxiang Bu

TOC Graphic

Organometallics
DOI: 10.1021/acs.organomet.7b00082
03 Apr 09:13

Enantioselective preparation and chemoselective cross-coupling of 1,1-diboron compounds

by Jack Chang Hung Lee

Nature Chemistry 5, 634 (2013). doi:10.1038/nchem.1679

Author: Jack Chang Hung Lee, Robert McDonald & Dennis G. Hall

03 Apr 09:03

Fixation of nitrous oxide by mesoionic and carbanionic N-heterocyclic carbenes

Chem. Commun., 2017, 53,4331-4334
DOI: 10.1039/C7CC01592E, Communication
Leonard Y. M. Eymann, Rosario Scopelliti, Farzaneh T. Fadaei, Giacomo Cecot, Euro Solari, Kay Severin
Double fixation of laughing gas (N2O) can be achieved under mild conditions using mesoionic or ditopic carbanionic carbenes.
The content of this RSS Feed (c) The Royal Society of Chemistry
11 Mar 09:09

Synthesis of a distinct water dimer inside fullerene C70

by Rui Zhang

Nature Chemistry. doi:10.1038/nchem.2464

Authors: Rui Zhang, Michihisa Murata, Tomoko Aharen, Atsushi Wakamiya, Takafumi Shimoaka, Takeshi Hasegawa & Yasujiro Murata

Endohedral C70 fullerenes containing either one or two water molecules have now been prepared using a molecular-surgery approach. The structure of H2O@C70 was determined by single-crystal X-ray analysis, revealing the encapsulated water molecule to be in an off-centre position. In (H2O)2@C70, the two water molecules form a discrete dimer held together with a single hydrogen bond.

11 Mar 08:14

Boron-Catalyzed Aromatic C–H Bond Silylation with Hydrosilanes

by Yuanhong Ma, Baoli Wang, Liang Zhang and Zhaomin Hou
Cuijingjing680

why not reported by someone who's major lies in main group chemistry

TOC Graphic

Journal of the American Chemical Society
DOI: 10.1021/jacs.6b01349
11 Mar 08:12

[Report] A bacterium that degrades and assimilates poly(ethylene terephthalate)

by Shosuke Yoshida
Cuijingjing680

I am not doing Bio or Environment science, but this paper is really fantastic to me.

Poly(ethylene terephthalate) (PET) is used extensively worldwide in plastic products, and its accumulation in the environment has become a global concern. Because the ability to enzymatically degrade PET has been thought to be limited to a few fungal species, biodegradation is not yet a viable remediation or recycling strategy. By screening natural microbial communities exposed to PET in the environment, we isolated a novel bacterium, Ideonella sakaiensis 201-F6, that is able to use PET as its major energy and carbon source. When grown on PET, this strain produces two enzymes capable of hydrolyzing PET and the reaction intermediate, mono(2-hydroxyethyl) terephthalic acid. Both enzymes are required to enzymatically convert PET efficiently into its two environmentally benign monomers, terephthalic acid and ethylene glycol. Authors: Shosuke Yoshida, Kazumi Hiraga, Toshihiko Takehana, Ikuo Taniguchi, Hironao Yamaji, Yasuhito Maeda, Kiyotsuna Toyohara, Kenji Miyamoto, Yoshiharu Kimura, Kohei Oda
23 Nov 09:50

Polyboramines for Hydrogen Release: Polymers Containing Lewis Pairs in their Backbone

by Audrey Ledoux, Paolo Larini, Christophe Boisson, Vincent Monteil, Jean Raynaud, Emmanuel Lacôte
Cuijingjing680

polymer, hydrogen storage

Abstract

The one-step polycondensation of diamines and diboranes triggered by the in situ deprotonation of the diammonium salts and concomitant reduction of bisboronic acids leads to the assembly of polymer chains through multiple Lewis pairing in their backbone. These new polyboramines are dihydrogen reservoirs that can be used for the hydrogenation of imines and carbonyl compounds. They also display a unique dihydrogen thermal release profile that is a direct consequence of the insertion of the amine–borane linkages in the polymeric backbone.

Thumbnail image of graphical abstract

Polybor-a-mine of H2: The one-step polycondensation of diamine and diborane precursors leads to polymer chains assembled by multiple Lewis pairs (see scheme). The new polyboramines are dihydrogen reservoirs that can hydrogenate imines, aldehydes, and ketones. The polyboramines release H2 thermally with a unique profile, which is a direct consequence of the polymeric nature of the material.

17 Mar 11:14

Sex redefined

by Claire Ainsworth
Cuijingjing680

So you are man (woman), are you sure?

Sex redefined

Nature 518, 7539 (2015). http://www.nature.com/doifinder/10.1038/518288a

Author: Claire Ainsworth

The idea of two sexes is simplistic. Biologists now think there is a wider spectrum than that.