Department of Organic Synthesis, University of Chemical Technology and Metallurgy, Sofia, Bulgaria.
J Fluoresc. 2013 May;23(3):459-71. doi: 10.1007/s10895-013-1168-z. Epub 2013 Feb 9.
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.
本文报告了新型第一代和第二代 PAMAM 光收集树状大分子的设计、发散合成和光物理行为。新型化合物的表面标记有 4-烷基氨基-1,8-萘酰亚胺黄绿光发射“供体”荧光团，能够吸收光并将能量有效地转移到单个罗丹明“受体”染料上。由于 pH 值依赖的罗丹明吸收，新型系统在碱性到酸性介质中显示出“关-开”切换的能量转移机制。所得结果表明，合成的波长移动荧光团作为有效的 pH 化学传感材料具有很高的潜力。
