Time-drive electrochemical and optical spectroscopic analysis for radical states of organic molecules
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초록
내용
In this study, the radicals of 4,4’,4”-tris[2-naphthyl(phenyl)amino] triphenylamine (2TNATA) molecules were analyzed by time-driven cyclic voltammetry and ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopic technique called charge-induced spectroscopy. Through the transient optical analysis, the radical density and molar extinction coefficient (ε) of the 2TNATA radicals were investigated, and the origin of the specific wavelength of these radicals was determined. The molar extinction coefficients of the 2TNATA radical states were 2.4 × 104, 4.0 × 104, and 1.7 × 104 cm3/mol∙cm at 450, 1100, and 1290 nm for 2TNATA1+, respectively, and 6.6 × 104 cm3/mol∙cm at 950 nm for 2TNATA2+. Based on the measured molar extinction coefficient, the charge-transfer efficiency of ReO3 25 mol% doped 2TNATA film was calculated to be 45.8%.