Newkome-type dendrons

Newkome-type dendrons were attached to the carbon scaffold of SWCNTs and MWCNTs by defect group functionalization [108], First- and second-generation amine dendrons such as those depicted in Fig. 1.5 were condensed with the carboxyl groups of purified and opened SWCNTs and MWCNTs according to the car-bodiimide technique [108], These CNTderivatives can be expected to combine the characteristics of carbon nanotubes with those of dendrimers, potential building blocks for supramolecular, self-assembling and interphase systems. 

Phthalocyanines and their metal complexes have interesting catalytic, electronic, and optical properties.172 Kimura et al.173 synthesized a phthalocyanine-centered dendrimer possessing Newkome-type dendrons,174 and subsequently used the second-generation cobalt-metalated phthalocyanine dendrimer as the catalyst for the oxidation of mercaptoethanol by dioxygen... 

Newkome-type dendrimers and dendrons with 1 -> 3- and 1 -> 4-branching recently became commercially available under the name NTreon [134a]. 

In order to facilitate recycling of the multiple TsDPEN-functionalized dendrimer catalysts, the same group recently reported the synthesis of a novel form of hybrid dendrimer ligands by coupling polyether dendrons with peripherally TsDPEN-functionahzed Newkome-type poly(ether-amide) dendrimer (Figure 4.28) [90]. The solubility of these hybrid dendrimers was found to be affected by the generation of the polyether dendron. The ruthenium complexes produced were applied in the asymmetric transfer hydrogenation of ketones, enones, imines and activated... 

More recently, non-traditional polymerization strategies have evolved to produce a fourth new major polymer architecmral class, now referred to as dendritic polymers [43]. This new architectural polymer class consists of four major subsets (1) random hyperbranched, (2) dendrigrafts, (3) dendrons and (4) dendrimers. Dendrimers, the most extensively studied subset were discovered by the Tomalia group while in The Dow Chemical Company laboratories (1979) and represent the first example of synthetic, macromolecular dendritic architecture [43,44]. First use of the term dendrimer appeared in preprints for the first SPSJ International Polymer Conference, held in Kyoto, Japan in 1984 [45]. The following year, a full article in Polymer Journal [46] (Fig. 8) described the first preparation of a complete family of Tomalia-type poly(amidoamine) (PAMAM) dendrimers (G = 1-7) and their use as precise, fundamental building blocks to form poly (dendrimers) or so-called starburst polymers. These poly(dendrimers) are now referred to as megamers [47, 48] and are described in more detail later in Sect. 6.4.3. Other pioneers in the dendritic polymer field include Vogtle, Newkome, Frechet, Majoral, and others. These historical contributions have been reviewed recently [52]. ... 

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