Synthesis of Diblock Codendrimers by Fusion of the Fréchet‐Type and the PAMAM Dendrons

Lee, Jae Woo; Kim, Junghwan; Han, Seung Choul; Kim, Woo Roi; Kim, Byoung-Ki; Kim, Ji Hyeon; Huh, Do Sung; Shin, Won Suk; Jin, Sung‐Ho

doi:10.1002/masy.200750404

Macromolecular Symposia

2007

DOI: 10.1002/masy.200750404

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Synthesis of Diblock Codendrimers by Fusion of the Fréchet‐Type and the PAMAM Dendrons

Jae Woo Lee

Junghwan Kim

Seung Choul Han

et al.

Abstract: Several diblock dendrimers were synthesized by fusion between the propargyl functionalized Fréchet-type polyether and the azide functionalized Tomaliatype PAMAM dendrons. This was based on the click chemistry protocol, the copper-catalyzed cycloaddition reaction between an alkyne and an azide. The diblock dendrimers were characterized by 1 H and 13 C NMR spectroscopy, IR spectroscopy, and mass spectra as well as GPC analysis.

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Cited by 6 publications

References 41 publications

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Novel Biopolymer Structures Synthesized by Dendronization of 6‐Deoxy‐6‐aminopropargyl cellulose

Pohl

Heinze

2008

Macromol. Rapid Commun.

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Propargyl cellulose with regioselective functionalization pattern was synthesized by nucleophilic displacement reaction of 6‐O‐toluenesulfonyl ester of cellulose (degree of substitution, DS 0.58) with propargyl amine. The novel 6‐deoxy‐6‐aminopropargyl cellulose provides an excellent starting material for the selective dendronization of cellulose at position 6 via the copper‐catalyzed Huisgen reaction yielding 6‐deoxy‐6‐amino‐(4‐methyl‐[1,2,3‐triazolo]‐1‐propyl‐polyamido amine) cellulose derivatives of first‐ (DS 0.33) and second (DS 0.25) generation, which are soluble in polar aprotic solvents. The novel biopolymer derivatives were characterized by elemental analysis, FT‐IR spectroscopy, and one‐ and two dimensional NMR spectroscopy, showing no side reactions (cross‐linking) or impurities and no conversion at the secondary positions.magnified image

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Novel Biopolymer Structures Synthesized by Dendronization of 6‐Deoxy‐6‐aminopropargyl cellulose

Pohl

Heinze

2008

Macromol. Rapid Commun.

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Polyamido amine dendrimers functionalized with poly(phenylenevinylene) dendrons at their periphery

Martín-Zarco

Toribio

Garcı́a-Martı́nez

et al. 2009

J. Polym. Sci. A Polym. Chem.

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A series of polyamido amine (PAMAM) dendrimers (Generations 2, 3, 4, and 6) fully functionalized at their periphery with first‐ and second‐generation poly (phenylenevinylene) (PPV) dendrons have been efficiently prepared. MALDI‐TOF mass spectrometry proved to be particularly useful for the characterization of the new hybrid dendrimers as well as for the estimation of the average number of PPV dendrons attached to the surface. The optical absorption and emission properties of these systems were studied. The materials display extremely high molar extinction coefficients and emit blue light with only slightly lower fluorescence quantum yields than the corresponding free dendrons. Self‐quenching interactions between PPV units were not observed in THF. However, the luminescence properties underwent a dramatic change when toluene was used as the solvent. The lower polarity of toluene caused shrinkage of the PAMAM structure and brought the PPV chromophores closer together, leading to self‐quenching interactions and excimer formation. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 6409–6419, 2009

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Studies on the molecular flexibility of novel dendronized carboxymethyl cellulose derivatives

Pohl

Morris

Harding

et al. 2009

European Polymer Journal

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Synthesis of Diblock Codendrimers by Fusion of the Fréchet‐Type and the PAMAM Dendrons

Cited by 6 publications

References 41 publications

Novel Biopolymer Structures Synthesized by Dendronization of 6‐Deoxy‐6‐aminopropargyl cellulose

Novel Biopolymer Structures Synthesized by Dendronization of 6‐Deoxy‐6‐aminopropargyl cellulose

Polyamido amine dendrimers functionalized with poly(phenylenevinylene) dendrons at their periphery

Studies on the molecular flexibility of novel dendronized carboxymethyl cellulose derivatives

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