Reactions of cupric halides with organic compounds—V
作者:S. Gibson、A.D. Mosnaim、D.C. Nonhebel、J.A. Russell
DOI:10.1016/s0040-4020(01)83252-x
日期:1969.1
9-Aryl-10-methylanthracenes undergo reaction with cupric halides to give the corresponding 9-aryl-10-halogenomethylanthracenes. 9-Ethyl- and 9-benzyl-10-methylanthracenes similarly undergo reaction at the Me group rather than at the Et or Bz groups to form the halogenomethyl compound. These results indicate that the 9-alkyl-10-anthrylmethyl radical is more stable than the radicals which would be formed
Synthesis and characterization of anthracene-clustering dendrimers: observation of fluorescence resonance energy transfer in the multichromophoric system
A series of anthracene-clustering dendrimers bearing various aliphatic substituents at the terminal positions were synthesized using a direct coupling strategy. A remarkable effect of the side chains was imparted to chemical properties of the dendrimers such as drastically increased solubility. Although the multibranched anthracene arrays in the dendritic architectures exhibited no cooperativity in terms of the absorption feature and behaved as single chromophoric systems, investigations focusing on fluorescence properties revealed that a type of cooperativity was present as expressed in the reduced quantum yields of fluorescence. An alternative approach utilizing time-resolved fluorescence decay measurements clearly demonstrated that the most reasonable mechanism of the cooperative action should involve two discernible channels of intramolecular fluorescence resonance energy transfer (FRET) occurring from one chromophore to the others within and across junctions of the branching units. (C) 2004 Elsevier Ltd. All rights reserved.
Stannous chloride mediated formation of (9-anthryl)methyl dimers from (halogenomethyl)anthracenes. Ground-state and adiabatic excited-state reversibility of intramolecular [4 + 2] cycloadditions