Synthesis, optical, and electrochemical properties of 4-fluorophenyl end-capped oligofluorenes
作者： Yi-Bing Huang , Yu Cui , Liu-Fang Zeng , You-Yu Shen , Ling-Zhu Feng
DOI: 10.1016/J.JFLUCHEM.2015.07.027
关键词: Absorption spectroscopy 、 Photoluminescence 、 Differential scanning calorimetry 、 Chemistry 、 Photochemistry 、 Crystallography 、 Thermogravimetric analysis 、 Spectral line 、 HOMO/LUMO 、 Fluorene 、 Absorption (electromagnetic radiation) 、 Physical and Theoretical Chemistry 、 Inorganic chemistry 、 Organic chemistry 、 Biochemistry 、 Environmental chemistry
摘要: Abstract This paper presents a series of oligofluorenes mainly based on 9,9-bis(2-ethylhexyl)fluorene units whose rigid core has been extended with 4-fluorobenzene termini. Thermogravimetric analysis, differential scanning calorimetry, absorption spectra, photoluminescence and cyclic voltammograms are used to analyze the thermal, optical electrochemical properties these oligomers. Test results show that emission spectra all oligomers succession red-shift bandgap becomes narrow as an extension π-conjugated system. The absorption/PL 4-fluorobenzene-terminaled red-shifted compared hydrogen-terminated compounds. highest occupied molecular orbital values also exhibit similar change.
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