title: Design, synthesis and pH sensing properties of novel PAMAM light-harvesting dendrons based on rhodamine 6G and 1,8-naphthalimide.
abstract: Herein we report on the design, divergent synthesis and photophysical behavior of novel PAMAM light-harvesting dendrons from first and second generation. The surface of novel compounds is labeled with 4-alkylamino-1,8-naphthalimide yellow-green emitting "donor" fluorophores capable of absorbing light and efficiently transferring the energy to a single rhodamine "acceptor" dye. Due to the pH dependent rhodamine absorption the novel systems show "off-on" switching energy transfer mechanism from alkaline to acid media. The results obtained illustrate the high potential of the synthesized wavelength-shifting fluorophores as efficient pH chemosensing materials.
authors: Department of Organic Synthesis, University of Chemical Technology and Metallurgy, Sofia, Bulgaria.
authors: Nikolai I
authors: NI
authors: Georgiev
authors: Vladimir B
authors: VB
authors: Bojinov
authors: Alexandrina I
authors: AI
authors: Venkova
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