کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1407791 1501701 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and photophysical properties of a single bond linked tetracene dimer
ترجمه فارسی عنوان
سنتز و خواص فتوفیزیکی یک دیتر تاتراسن پیوند
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی


• A tetracene dimer linked directly with a single bond was prepared for the first time.
• The stability was improved significantly by introducing electron withdrawing groups.
• The excited state delocalized on both two tetracene subunits.
• The excited state decay mostly along fluorescence emission channel.

A tetracene dimer linked directly by a single bond has been successfully prepared by using electron withdrawing groups to improve the stability. The molecular structure of this dimer is characterized by 1H NMR, MALDI-TOF mass spectroscopy, and elemental analysis. The minimized molecular structure and X-ray crystallography reveal that the tetracene subunits of this dimer adopt an orthogonal configuration. Its absorption spectrum differs significantly from that of its monomeric counterpart, suggesting the presence of strong interactions between the two tetracene subunits. The excited state of this dimer is delocalized on both two tetracene subunits, which is significantly different from that of orthogonal anthracene dimers, but similar with that observed for orthogonal pentacene dimer. Most of the excited states of this dimer decay by radioactive channels, which is different from the localized twisted charge transfer state (LTCT) channel of anthracene dimers and the singlet fission (SF) channel of pentacene dimers. The results of this research suggest that similar orthogonal configurations caused different propertied for acene dimers with different conjugation length.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1116, 15 July 2016, Pages 200–206
نویسندگان
, , , , ,