کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
175856 458924 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Branched benzothiadiazole-cored oligomers with terminal carbazoles: Synthesis and fluorescence probing nitroaromatics
ترجمه فارسی عنوان
الیگومرهای بنزوتی دیآزولول با کاتابازولهای ترمینال: سنتز و فلورسانس پروب نیترواروماتیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• New branched benzothiadiazole-cored conjugated oligomers with terminal carbazoles 1 and 2 have been synthesized.
• Weak π-π interaction occurs in the solid states of 1 and 2 due to site isolation effect of the branched architectures.
• The emission of the films based on 1 and 2 could be quenched obviously upon exposed to gaseous TNT and DNT.

New branched benzothiadiazole-cored conjugated oligomers with terminal carbazoles 1 and 2 have been synthesized. It was found that no obvious shifts of the maximal absorption bands for 1 and 2 were detected in the films compared with those in solutions, indicating weak π-π stacking occurred in the solid states on account of site isolation effect of the branched architectures. Hence, the synthesized oligomers could emit strong red light in the films. Notably, the emission of the films based on 1 and 2 could be quenched obviously upon exposed to gaseous TNT and DNT. The fluorescence quenching efficiency of the oligomer 2-based film reached 91% when exposed to the saturated vapor of DNT for 3 min at 55 °C. The linear Stern–Volmer plot and the decrease of the fluorescence lifetime of 2 induced by DNT suggested the fluorescence sensing mechanism was due to the photo-induced electron transfer.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 116, May 2015, Pages 36–45
نویسندگان
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