کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
177998 459011 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and optical properties of a series of thermally stable diphenylanthrazolines
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Synthesis and optical properties of a series of thermally stable diphenylanthrazolines
چکیده انگلیسی

A series of diphenylanthrazolines were synthesized by Friedländer condensation of 2,5-dibenzoyl-1,4-phenylenediamine and acetyl-functionalized compounds in the presence of polyphosphoric acid as catalyst, in yields ranging from 61% to 88%. The diphenylanthrazolines are thermally robust with high decomposition temperatures (>380.0 °C) and high melt transitions (317–462 °C). All of them show the lowest energy absorption bands (λmaxAbs: 394–433 nm) from the π–π∗ transitions by virtue of their large molar extinction coefficients (ɛ ≈ 104 M−1 cm−1), revealing low optical band gaps (2.59–2.80 eV). The compounds emit blue fluorescence with λmaxEm ranging from 430 to 466 nm in dilute toluene solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 81, Issue 3, June 2009, Pages 218–223
نویسندگان
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