Unexpected Macrocyclic Multinuclear Zinc and Nickel Complexes that Function as Multitasking Catalysts for CO2 Fixations

Kazuto Takaishi, Bikash Dev Nath, Yuya Yamada, Hiroyasu Kosugi, Tadashi Ema

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Unique self-assembled macrocyclic multinuclear ZnII and NiII complexes with binaphthyl-bipyridyl ligands (L) were synthesized. X-ray analysis revealed that these complexes consisted of an outer ring (Zn3L3 or Ni3L3) and an inner core (Zn2 or Ni). In the ZnII complex, the inner Zn2 part rotated rapidly inside the outer ring in solution on an NMR timescale. These complexes exhibited dual catalytic activities for CO2 fixations: synthesis of cyclic carbonates from epoxides and CO2 and temperature-switched N-formylation/N-methylation of amines with CO2 and hydrosilane.

Original languageEnglish
JournalAngewandte Chemie - International Edition
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Multitasking
2,2'-Dipyridyl
Methylation
Carbonates
Epoxy Compounds
X ray analysis
Nickel
Amines
Zinc
Catalyst activity
Ligands
Nuclear magnetic resonance
Catalysts
Temperature

Keywords

  • carbon dioxide fixation
  • cyclic carbonates
  • multinuclear complexes
  • N-functionalization
  • self-assembly

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

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abstract = "Unique self-assembled macrocyclic multinuclear ZnII and NiII complexes with binaphthyl-bipyridyl ligands (L) were synthesized. X-ray analysis revealed that these complexes consisted of an outer ring (Zn3L3 or Ni3L3) and an inner core (Zn2 or Ni). In the ZnII complex, the inner Zn2 part rotated rapidly inside the outer ring in solution on an NMR timescale. These complexes exhibited dual catalytic activities for CO2 fixations: synthesis of cyclic carbonates from epoxides and CO2 and temperature-switched N-formylation/N-methylation of amines with CO2 and hydrosilane.",
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T1 - Unexpected Macrocyclic Multinuclear Zinc and Nickel Complexes that Function as Multitasking Catalysts for CO2 Fixations

AU - Takaishi, Kazuto

AU - Nath, Bikash Dev

AU - Yamada, Yuya

AU - Kosugi, Hiroyasu

AU - Ema, Tadashi

PY - 2019/1/1

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N2 - Unique self-assembled macrocyclic multinuclear ZnII and NiII complexes with binaphthyl-bipyridyl ligands (L) were synthesized. X-ray analysis revealed that these complexes consisted of an outer ring (Zn3L3 or Ni3L3) and an inner core (Zn2 or Ni). In the ZnII complex, the inner Zn2 part rotated rapidly inside the outer ring in solution on an NMR timescale. These complexes exhibited dual catalytic activities for CO2 fixations: synthesis of cyclic carbonates from epoxides and CO2 and temperature-switched N-formylation/N-methylation of amines with CO2 and hydrosilane.

AB - Unique self-assembled macrocyclic multinuclear ZnII and NiII complexes with binaphthyl-bipyridyl ligands (L) were synthesized. X-ray analysis revealed that these complexes consisted of an outer ring (Zn3L3 or Ni3L3) and an inner core (Zn2 or Ni). In the ZnII complex, the inner Zn2 part rotated rapidly inside the outer ring in solution on an NMR timescale. These complexes exhibited dual catalytic activities for CO2 fixations: synthesis of cyclic carbonates from epoxides and CO2 and temperature-switched N-formylation/N-methylation of amines with CO2 and hydrosilane.

KW - carbon dioxide fixation

KW - cyclic carbonates

KW - multinuclear complexes

KW - N-functionalization

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