- Syntheses, spectroscopic properties, and CU(I) complexes of all possible symmetric BI-1,10-phenanthrolines
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All possible symmetric bi-1,10-phenanthrolines (biphens) were synthesized by Ni-catalyzed coupling of corresponding halo-1,10-phenanthrolines. Their absorption and emission spectra were compared with those of phenanthroline as the reference compound. The spectral feature is explained by the molecular conformation, namely, coplanar 2,2′- and 3,3′-biphens and nearly bisected 4,4′- and 5,5′-biphens. The effects of additives, H+ or Zn2+, on the electronic spectra varied depending on the biphen ligand. The 2,2′-ligand formed a helical complex with Cu+ ions in a 2:2 ratio as revealed by spectroscopic titration and X-Ray analysis.
- Toyota, Shinji,Goto, Akito,Kaneko, Keiko,Umetani, Takumi
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- A new method for the reaction of cross-coupling: Preparation of 5,5′-bi(1,10-phenanthroline)
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Synthesis and characterization of 5,5′-bi(1,10-phenanthroline) (3) are described. Compound 3 was obtained by treatment of 5-chloro-1,10-phenanthroline (1) with 4-hydroxy- phthalonitrile (2) in the presence of K2CO3 as a base in DMF at room temperature for 25 h.
- A?lrta?, Mehmet Salih
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- Synthesis of poly(1,10-phenanthroline-5,6-diyl)s having a π-stacked, helical conformation
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5,6-Dibromo-1,10-phenanthroline and 2,9-di-n-butyl-5,6-dibromo-1,10-phenanthroline were polymerized using a Ni catalyst to afford helical polymers in which the phenanthroline moieties are densely stacked on top of each other. Polymerization of the latter monomer using a chiral catalyst led to a preferred-handed helix. This is the first Ni-catalyzed helix-sense-selective polymerization of aromatic compounds.
- Yang, Weixi,Nakano, Tamaki
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p. 17269 - 17272
(2015/12/08)
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