کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11003716 1462014 2018 36 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly sensitive and stable perylene sensor for ammonia detection: A case study of structure-property relationships
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Highly sensitive and stable perylene sensor for ammonia detection: A case study of structure-property relationships
چکیده انگلیسی
In this contribution, we report three perylenediimides (PDIs) substituted with hydrogen (PDI), mono-nitro (PDIN) and di-nitro groups (PDI2N) at bay positions. The resulting sensing devices, which were composed of self-assembled micro/nanoribbons, exhibited high sensitivity toward ammonia vapor. Among the three PDIs, the PDI2N device displayed the lowest detection limit, as evidenced by its reduction potential of −0.36 eV, and the best ambient stability due to its reduction potential being as low as −4.35 eV. A positive reduction potential and moderate π-π orbital overlap conferred the PDIN device with the highest sensitivity. By contrast, a negative reduction potential of −0.73 eV resulted in a severe lack of carrier density and, therefore, induced the poorest sensitivity in the PDIs device. These results reveal that detection limits are closely associated with the reduction potential of PDIs devices and that ambient stability is determined by the lowest unoccupied molecular orbital energy level. The combined effects of reduction potential and π-π orbital overlap modulated the sensitivity of the PDIs devices. This study not only presents sensitive and ambient-stable PDIs sensing devices but also identifies the critical factors influencing their sensitivity, detection limit, and stability. The excellent sensing performance and extensive theoretical research presented in this work are expected to provide a basis for the design of simple, efficient, and highly stable PDIs sensors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 275, 1 December 2018, Pages 451-458
نویسندگان
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