AI Article Synopsis
- A new PAMAM system was developed that uses a light harvesting antenna with yellow-green emitting donor units to absorb light and transfer energy to a Rhodamine 6G acceptor.
- The system is structured in a way that enables it to function as a molecular fluorescence probe, utilizing both electron transfer and pH-dependent absorption.
- This combination allows the antenna to act as a selective ratiometric pH fluorescence probe, making it useful for monitoring pH changes in complex solutions.
Article Abstract
A novel PAMAM wavelength-shifting bichromophoric system has been successfully developed. Novel compound was configured as a light harvesting antenna where the system surface is labeled with yellow-green emitting 4-(N,N-dimethylamino)ethylamino-1,8-naphthalimide "donor" units capable of absorbing light and efficiently transferring the energy to a focal Rhodamine 6G "acceptor". The periphery of the system was designed on the "fluorophore-spacer-receptor" format, capable of acting as a molecular fluorescence photoinduced electron transfer based probe. Due to the both effects, photoinduced electron transfer in the periphery of the system and pH dependent rhodamine core absorption, novel antenna is able to act as a selective ratiometric pH fluorescence probe in aqueous medium. Thus, the distinguishing features of the fluorescence resonance energy transfer systems were successfully combined with the properties of classical ring-opening charge transfer systems, which may be beneficially for monitoring pH variations in complex samples.
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| http://dx.doi.org/10.1016/j.saa.2014.07.076 | DOI Listing |
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