129536-40-9Relevant academic research and scientific papers
Hydrogen-bonded dendronized polymers and their self-assembly in solution
Xie, Dang,Jiang, Ming,Zhang, Guangzhao,Chen, Daoyong
, p. 3346 - 3353 (2007)
Frechet-type benzyl ether dendrons of second and third generations with a carboxyl group (G2, G3) at the apex site could attach to poly(4-vinylpyridine) (PVP), forming hydrogen-bonded dendronized polymers (HB denpols) in their common solvent, chloroform. The HB denpols show unique self-assembly behavior, forming vesicles in the common solvent under ultrasonic treatment. The structure and morphology of the vesicles were characterized by dynamic light scattering (DLS), static light scattering (SLS), SEM, TEM, and AFM. The size of the vesicles decreases and the thickness of the vascular membrane increases as the molar ratio of Gx/PVP increases. The hydrogen bonding. π-π aromatic stacking of the dendrons. and the considerable difference in architecture between the dendron Gx and PVP are the main factors facilitating the assembly of the HB denpols in the common solvent.
Facile synthesis of aryl ether dendrimer from unprotected AB2 building blocks using thionyl chloride as an activating agent
Yamazaki, Natsuko,Washio, Isao,Shibasaki, Yuji,Ueda, Mitsuru
, p. 2321 - 2324 (2006)
A novel, rapid, inexpensive, and highly efficient convergent approach for the synthesis of a Frechet- type aryl ether dendrimer using thionyl chloride has been developed. In this method, the purification of each dendron and a dendrimer occurs by recrystallization, extraction, and precipitation. The MALDI-TOF MS spectrum supported the formation of the G2, G3, and G4 dendrons and the star-shaped G4 dendrimer.
Dendrimer solid acid and polymer electrolyte membrane including the same
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, (2011/11/07)
Provided are a dendrimer solid acid and a polymer electrolyte membrane using the same. The polymer electrolyte membrane includes a macromolecule of a dendrimer solid acid having ionically conductive terminal groups at the surface thereof and a minimum amo
Luminescent micro and nanogel formation from AB3 type poly(aryl ether) dendron derivatives without conventional multi-interactive gelation motifs
Rajamalli,Prasad, Edamana
, p. 1541 - 1548 (2011/09/20)
We report the synthesis, gelation and photophysical properties of luminescent AB3 type poly(aryl ether) dendron derivatives in the absence of conventional multi-interactive gelation motifs. The gelation process is controlled through employing partial polar solvent milieu, which significantly enhances the propensity of π-π interaction between the aryl units present in the system. The self-assembly leads to unprecedented gelation through entrapping solvent molecules in the fibrillar arrangement of poly(aryl ether) units. The strategy was further utilized to prepare an excimer based photoluminescent gel through incorporating anthracene units in the dendrons. The close proximity between the anthracene units in the gel renders the formation of anthracene excimers at room temperature, resulting in the emission of bright green light from the gel, upon UV excitation. The study suggests that the size and packing of the self-assembled fibre can be controlled by the generation and functional groups present in the dendron. Furthermore, the strategy envisages an easy approach to generate fluorescent Low Molecular-mass Organic Gelator (LMOG) through incorporating poly cyclic aromatic hydrocarbon units to the poly(aryl ether) dendrons, since the self-assembly is largely guided by π-π interactions. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Synthesis of organometallic poly(dendrimer)s by macromonomer polymerization: effect of dendrimer size and structural rigidity on the polymerization efficiency
Cheung, Siu-Yin,Chow, Hak-Fun,Ngai, To,Wei, Xiaoling
supporting information; experimental part, p. 2278 - 2288 (2009/10/23)
Two series of first to third generation (G1-G3) oligoether dendrimers, one hearing a shorter spacer chain (C-O) and the other having a longer spacer branch (C-C-C-O) were prepared. Both series of compounds, containing two reactive C≡CH moieties on the dendrimer surface, were used as macromonomers and copolymerized with trans-[Pt(PEt3)2Cl2] to form organometallic poly(dendrimer)s by an outer-sphere-outer-sphere connection strategy. It was found that concentration of monomer used in the polymerization, the dendrimer generation, and, most strikingly, the length of the spacer were key factors that determined the polymerization efficiency. Hence, the structurally more rigid and compact C-O linked dendrimers formed poly(dendrimer)s with a higher degree of polymerization than the structurally less rigid and more bulky C-C-C-O dendrimers. This result was due to the higher tendency to form cyclic oligomers in the latter series of compounds. In addition, the differences in the polymerization efficiency among the three generations of dendrimers could be explained by the gradual decrease of reactive functional group density on the dendrimer surface.
Synthesis of dendritic phenol ether derivatives with a naphthalene core
Xiang, Zhonghua,Cao, Derong
, p. 1318 - 1324 (2008/09/19)
A series of dendritic phenol ether derivatives with a naphthalene core were synthesized by the Williamson reaction as a coupling reaction between 1-hydroxymethylnaphthalene and polyether-based dendritic fragments in the presence of phase-transfer catalyst and alkali. The modified method for chlorination of dendritic benzyl alcohol was also developed using PPh3 and CCl4 as reagents and CH2Cl2/CCl4 as solvent. Copyright Taylor & Francis Group, LLC.
Toward the continuous-flow synthesis of chiral tertiary alcohols by enantioselective addition of organozinc reagents to ketones using nanosize isoborneol ligands
Forrat, Vicente J.,Ramon, Diego J.,Yus, Miguel
, p. 537 - 541 (2008/09/21)
The catalytic enantioselective addition of different organozinc reagents, such as alkyl or in situ generated phenylzinc derivatives to simple aryl ketones, was accomplished using titanium tetraisopropoxide and chiral ligands derived from trans-1-arenesulf
Triazole-linked dendro[60]fullerenes: modular synthesis via a 'click' reaction and acidity-dependent self-assembly on the surface
Mahmud, Ilias M.,Zhou, Ningzhang,Wang, Li,Zhao, Yuming
experimental part, p. 11420 - 11432 (2009/04/11)
A series of Fréchet-type dendron functionalized [60]fullerene derivatives that bear a 1,2,3-triazole linkage group, referred to as triazole-linked dendro[60]fullerenes, were prepared via a modular synthetic protocol based on a Cu-catalyzed [3+2] cycloaddi
Optical switching and antenna effect of dendrimers with an anthracene core
Cao, Derong,Dobis, Silvia,Gao, Chunmei,Hillmann, Sabine,Meier, Herbert
, p. 9317 - 9323 (2008/12/20)
Dendrimers 6Gi (i=1-4) consisting of an anthracene core and Frechet dendrons which are attached via a CH2OCH2 chain in the 9-position undergo quantitative and completely reversible intramolecular [4π+4π] cycloaddition. The
Dendrimer analogues of linear molecules to evaluate energy and charge-transfer properties
Nantalaksakul, Arpornrat,Dasari, Raghunath Reddy,Ahn, Tai-Sang,Al-Kaysi, Rabih,Bardeen, Christopher J.,Thayumanavan
, p. 2981 - 2984 (2007/10/03)
We have designed and synthesized difunctionalized dendrimers containing two donors in the periphery and an acceptor at the core to serve as scaffolds for comparison with linear analogues to investigate the advantage of dendritic scaffolds for energy and c
