کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400194 | 1505915 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photophysical properties of 1,8-naphthalic anhydride in aprotic solvents: An electron acceptor in excited state
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
1,8-Naphthalic anhydride (NAN) has long been known as an intermediate for the synthesis of 1,8-naphthalimide derivatives with diverse applications. Uses of NAN for other purposes are restricted because it hydrolyzes in water and other protic solvents. In the current work we have investigated the absorption, steady-state and time-resolved fluorescence spectroscopy of NAN in eight different aprotic solvents of varying polarity. The compound is found to have different quantum yields in all the solvents. Astoundingly, NAN shows minimal fluorescence yield in dimethyl sulphoxide and N,N-dimethylformamide which is found to originate from pure collisional quenching owing to proton affinity of the solvent. In aprotic solvents acetonitrile and ethyl acetate, fluorescence emission and lifetime of NAN are quenched on addition of aliphatic amines namely triethylamine (TEA), tri-N-butylamine (TBA) and diisopropylethylamine (DIEA). Laser flash photolysis experiments in acetonitrile solvent have been used to find out the transient intermediates, which depict the involvement of photo-induced electron transfer from the amines to NAN. Hence, NAN has the potential to act as an efficient photo-induced electron acceptor in aprotic medium.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 145, January 2014, Pages 410-419
Journal: Journal of Luminescence - Volume 145, January 2014, Pages 410-419
نویسندگان
Sujay Ghosh, Subhanip Biswas, Mousumi Mondal, Samita Basu,