New cyclen-cored dendrimers functionalized with pyrene: Synthesis characterization, optical and photophysical properties

Abstract:

New cyclen (1,4,7,10-teraazacyclododecane) cored dendrimers up to the second generation, functionalized with 4, 8 and 16 pyrene units, respectively, were synthesized following a convergent procedure. All new compounds were characterized by NMR spectroscopies and ESI or MALDI TOF mass spectrometry. The optical and photophysical properties of the new dendrimers were studied in THF solution. Absorption spectra showed the typical absorption bands of pyrene moieties. In the fluorescence spectra, monomer as well as excimer emission were observed for all compounds. An increased proportion of excimer emission was observed in the dendrimer of the highest generation.

Año de publicación:

2017

Keywords:

• optical properties
• Pyrene
• Dendrimer
• Cyclen

Fuente:

google

scopus