Phenylacetylene monodendrons

Bharathi, P. Patel, U. Kawaguchi, T. Pesak, D. J. Moore, J. S. Improvements in the Synthesis of Phenylacetylene Monodendrons Including a Solid-Phase Convergent Method, Macromolecules 1995, 28, 5955. 

Purely organic light-harvesting dendrimers have been prepared by Moore and coworkers [42], In these systems (Figure 17), the light absorbed by the peripheral chromophores (phenylacetylene monodendrons) is transferred to the core (per-ylene) via a coulombic mechanism. The efficiency of the process depends on the... 

Scheme 12-2 A repetitive, nonlinear growth scheme for the convergent synthesis of phenylacetylene monodendrons.

J.S. Melinger, L.D. Davis, D. McMorrow, Y. Pan, Z. Peng, Photoluminescence properties of conjugated phenylacetylene monodendrons in thin films, J. Fluoresc. 105-112 (2004)... 

Branched phenylacetylene monomers can be used to construct dendrimers on supports. This was accomplished using a triazene tether as a focal point, the reaction triad outlined above, and an AB2 monomer, as seen in Scheme 7.16 As in similar solution-phase convergent dendrimer syntheses, the first step was to prime the periphery of the dendrimer with t-butyl groups by di-coupling of a triazene-tethered dibromoaryl monomer with (di-f-butyl-phenyl)acetylene. In this and all subsequent coupling steps, an excess amount of the monodendron acetylene was used to drive the reaction to completion. The reagents and catalysts were washed away and the excess monodendron was recovered. At the end of the first step, the tri-aryl dendron I-M3-(t-Bu)4 was cleaved from the support (M represents the dendritic monomer unit). Two equivalents of this product were then coupled with the triazene-tethered di-acetylene ary] monomer to produce the heptaaryl dendron I-M7-(r-Bu)8. 

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