Synthesis and Properties of Some Derivatives of 1,2,3,4-Tetrafluoroacridine for Solid State Emitting Systems

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• 作者：Antonio Papagni ; Paola Del Buttero ; Massimo Moret ; Adele Sassella ; Luciano Miozzo ; and Giovanni Ridolfi
• 刊名：Chemistry of Materials
• 出版年：2003
• 出版时间：December 30, 2003
• 年：2003
• 卷：15
• 期：26
• 页码：5010 - 5018
• 全文大小：163K
• 年卷期：v.15,no.26(December 30, 2003)
• ISSN：1520-5002

文摘

The resonant energy transfer (RET) between fluorescent organic molecules is a veryimportant phenomenon widely investigated for its potential in developing devices such aslight-emitting diodes and lasers. Energy transfer processes take place between two differentmolecules and they are usually observed when the emission spectrum of the first molecule(called donor) overlaps with the absorption spectrum of the other one (called acceptor). Theindividuation of this kind of molecule inside a common structural motif represents aninteresting approach aimed at simplifying the modeling of their synthetic procedure; indeedthe desired couple can be obtained simply acting on the electronic properties of substituentspresent on the molecule and helps the understanding of the energy transfer processes. Thetetrafluoroacridines, readily accessible from aniline and pentafluorobenzaldehyde, have beenselected as a structural motif because their absorption and emission properties can be easilytuned by acting on the nature of substituents present on the starting aniline. The synthesisof new terms of these molecules along with a preliminary study on their optical,electrochemical, and structural properties, in solution and in the solid state, is described.We present here a study on the optical properties of a molecular crystal of donor doped withmolecules of acceptor, both chosen among the prepared tetrafluoroacridines; the temperaturedependence of luminescence spectrum allowed us to take a glance upon the energy transferand excitation migration phenomena occurring in this system.