- Poly(phenylene-pyridyl) dendrimers: Synthesis and templating of metal nanoparticles
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A new family of poly(phenylene-pyridyl) dendrimers (up to the fourth generation) with different periphery was synthesized via a divergent route by using a cascade of Diels - Alder cycloadditions. Tetra(4-ethynylphen-1-yl) methane served as a core. A new A
- Shifrina, Zinaida B.,Rajadurai, Marina S.,Firsova, Nina V.,Bronstein, Lyudmila M.,Huang, Xinlei,Rusanov, Alexander L.,Muellen, Klaus
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p. 9920 - 9932
(2008/02/02)
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- Syntheses and UV/Vis-spectroscopic properties of hydrophilic 2-, 3-, and 4-pyridyl-substituted solvatochromic and halochromic pyridinium N-phenolate betaine dyes as new empirical solvent polarity indicators
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Syntheses and negative solvatochromism of nine new hydrophilic 2-, 3-, and 4-pyridyl-substituted pyridinium N-phenolate betaine dyes 3-11 are described. These were produced in order to obtain zwitterionic dyes better soluble in water and other aqueous media (such as binary water/solvent mixtures, aqueous ionophore solutions) than the rather hydrophobic standard betaine dyes 1 and 2, which have been used to establish an empirical scale of solvent polarity, called the ET(30) scale. Betaine dye 8, in which three of the peripheral phenyl groups of 1 are replaced by two 3-pyridyl rings and one 4-pyridyl ring, proved to be particularly suitable for the determination of ET(30) values in aqueous media. Wiley-VCH Verlag GmbH, 2001.
- Reichardt, Christian,Che, Daqing,Heckenkemper, Guido,Schaefer, Gerhard
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p. 2343 - 2361
(2007/10/03)
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