NDLI: Design and synthesis of 4,4′-disubstituted-[2,2′]-bipyridines for catalyzing CO/styrene copolymerization with palladium(II)

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Design and synthesis of 4,4′-disubstituted-[2,2′]-bipyridines for catalyzing CO/styrene copolymerization with palladium(II)

Content Provider	Springer Nature Link
Author	Guo, Jintang Yu, Peiyun Wang, Haixia Zhao, Haiyang
Copyright Year	2015
Abstract	A series of 4,4’-disubstituted-[2,2’]-bipyridines, featuring electron withdrawing/donating functional groups such as amino, chloro, nitro, ethoxycarbonyl, carboxy, methyl, methoxy and hydroxymethyl, have been synthesized and employed in the copolymerization of carbon monoxide(CO)and styrene. The available bipyridine and its derivatives were coordinated with palladium(II)acetate for catalyzing the copolymerization of CO and styrene, and the concomitant polyketone was characterized by means of $^{13}$C NMR, FTIR, differential scanning calorimetry( DSC)and element analysis techniques concerning its structure and thermal performance. The effect of different electron-donating and electron-withdrawing groups on catalyst performance and molecular weight of copolymer was studied under certain experimental condition. It has been proved that the enhancement of electron donating and conjugative effects on bipyridine ligand will not only improve the catalytic activity of the composition, but also increase the molecular weight of the as-prepared polyketone. The catalytic activity is the highest in hydroxymethyl substituted 2,2’-bipyridine ligand(1 356 gSTCO/(gPd · h)), when the molecular weight and polydispersity index of the polyketone are M $_{n}$=8 502,M $_{w}$=1 3440 and M $_{w}$/M $_{n}$=1.581, respectively.
Starting Page	406
Ending Page	411
Page Count	6
File Format	PDF
ISSN	10064982
Journal	Transactions of Tianjin University
Volume Number	21
Issue Number	5
e-ISSN	19958196
Language	English
Publisher	Tianjin University
Publisher Date	2015-10-18
Publisher Place	Tianjin
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bipyridine CO/styrene copolymerization palladium(II)complex polyketone Mechanical Engineering Science
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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