Frechet series

Taking a purely mathematical approach to the concept embodied in (2), they made use of the Frechet series of multiple integrals to express it. In the one-dimensional case, for the strain e at time t in terms of the history of stress a this takes the form... 

Miller RD, Hofer D, McKean DR, Willson CG, West R, Trefonas P (1984) in Materials for Microlithography, Thomson L, Willson CG, Frechet JMJ (eds), ACS Symposium Series 266, American Chemical Society, Washington, DC... 

FuUerodendrimers also allow an evaluation of the accessibility of the Cgo core unit by studying bimolecular deactivation of its excited states by external quenchers. Recently Ito, Komatsu, and co-workers have used this approach to investigate a series of fuUerodendrimers (9-11) in which Frechet-type dendrons have been connected to a fullerene moiety via an acetylene linker (Fig. 5) [35]. 

In their efforts to construct stimuli-responsive, supramolecular amphiphiles, Frechet et al. [126-129] reported the synthesis of a novel series of AB and ABA block copolymers via the Williamson ether synthesis (e.g., 47, Fig. 21). Polyethylene glycols (PEGs) of different lengths were used as the linear hydrophilic B block while polyaryl ether dendrons of different sizes were used as the hydro-phobic A block. These copolymers were characterized by optical microscopy,... 

More recently Frechet and Gitsov [130] used a similar approach as above and synthesized a novel series of dendritic copolymers derived from a central penta-erythritol core unit. These hybrid star molecules behaved as unimolecular micelles with different core-shell conformational-structures as a response to the polarity of the solvent used. 

Following the convergent procedure, dendrimers of type 58,59 and 60 have been prepared from the chiral core triol 54 and achiral Frechet-type [62] ben-zylic branch bromides. In the series of dendrimers with aromatic spacers (60) and without spacers (58), the optical activity [a]D decreased on going from the 1st (not shown in Fig. 21) to the 2nd generation, whereas with aliphatic spacers... 

Eichman, J.D., Bielinska, A.U., Kukowska-Latallo, J.F., Donovan, B.W., and Baker Jr., J.R. (2001) Bioapplications of PAMAM dendrimers in dendrimers and other dendritic polymers. In Wiley Series in Polymer Science (M.J. Frechet, and D.A. Tomalia, eds.), pp. 441M61. John Wiley Sons, Ltd, West Sussex, UK. 

Frechet, J.M.J. and Tomalia, D.A. (eds.) (2002) Dendrimers and Other Dendritic Polymers (Wiley Series in Polymer Science), Wiley. 

Frechet and coworkers reported a first example of the synthesis of a hyperbranched aliphatic polyester by polymerization of an AB inimer, i.e., 4-(hydroxyethyl)-s-caprolactone [164]. It is worth noting that the synthesis of this inimer is quite long. Since this pioneering work, other teams have reported the polymerization of a series of AB [165-167] and AB2 [168] inimers, which are shown in Fig. 38. The polymerization of these inimers can be carried out in the absence or presence of a comonomer such as sCL [167]. 

Gorman et al. showed this trend in iron-sulfur cluster core dendrimers. The separation between the anodic and cathodic peak potentials ( E) in a series of dendrimers of the form Core10-Rpt5(Frechet)-Periph3, n = 0-4 increased from 130 to... 

For this purpose, a series of Frechet-type polyether dendrons of zeroth-to third-generation containing an NCN-pincer metal complex (M = Pt, Ni) at the focal point of the wedge were prepared [69]. Their synthesis was either... 

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