Design, Synthesis, Characterization And Performance Studies Of Organic Light-Emiting Molecular

In this paper, a series of fluorescent derivatives of donor-acceptor substituted triphenylamine-core starting from 2,7-dibromo-9-fluorenone have been synthesized. Aromatic imide (N-phthalimide) group was firstly introduced as the electron acceptor in the D-Ï€-A optoelectronic materials to promote solubility and thermal stability. We studied the thermal stability, electrical and photophysical properties via Cyclic voltammetry, Absorption and Fluorescence spectra, thermogravimetric analysis. The relationship between the polarity of solvents and the conjugation length of the D-A structure with luminescent properties have also been studied. All the optoelectronic materials showed high solubility and excellent thermal stability, good Hole-injection capability and photophysical properties, we also found that in different solvents or solid film these materials displayed some extent of wavelength shift. The results has important significance for further research; On the other hand, a series of fluorene-triphenylmethane derivatives containing the construction of donor-acceptor has been designed and synthesized. A class of small organic molecules with non-communist plane spatial structure has been obtained; Fianly, starting from aryl substituted acid ethyl ester, a series of novel 1,3,4-oxadiazole derivatives were designed and synthesized.The results are listed as bellow:(1) A series of donor-acceptor (D-A) substituted with Triphenylamine-core fluorescent derivatives which arylamines as the electron donor and Aromatic imide (N-phthalimide) group was firstly as the electron acceptor has been synthesized. The synthesis of target compounds were optimized to get high yield, The target molecules were confirmed by 1H NMR,13C NMR, FT-IR and HR-MS. The thermal stability, electrical and photophysical properties, the relationship between the polarity of solvents and the conjugation length of the D-A structure with luminescent properties were been studied. All the reesults have been analysised.(2) A series of fluorene-triphenylmethane derivatives containing the construction of donor-acceptor has been designed and synthesized. A class of small organic molecules with non-communist plane spatial structure has been obtained. The target molecules were confirmed by 1H NMR,13C NMR, FT-IR and MS.(3) Starting from aryl substituted acid ethyl ester, five 1,3,4-oxadiazole derivatives were designed and synthesized through hydrazinolysis, cyclization with the chloride. The synthesis of target compounds were optimized. The target molecules were confirmed by 1H NMR,13C NMR FT-IR and MS.