RSC_New Journal of Chemistry _Front cover Picture
07 April 2020, Issue 13
Page 4963 to 5166
Coumarin–tetraphenylethylene regioisomers: synthesis, photophysical and aggregation-induced emission properties
Coumarin–tetraphenylethylene (CTPE) regioisomers with different linkage types (single-bond, vinyl, and acetylene) and substitution positions (coumarin C5, C6, C7) were synthesized and characterized using 1H NMR, 13C NMR, and high-resolution mass spectroscopy. The effects of substitution position and conjugation in CTPEs 1–9 on absorption, fluorescence, and aggregation-induced emission enhancement were explored. Electronic absorption and emission spectra indicate that CTPEs with C7 substitution are red-shifted compared to those substituted at C5 or C6. CTPEs 1–9 form aggregates in tetrahydrofuran/water (1 : 99, v/v) and exhibit aggregation-induced emission. Nanoaggregates were characterized using scanning electron microscopy and dynamic light scattering. The structure of CTPE 1 was confirmed by single crystal X-ray diffraction analysis
- T. Sheshashena Reddy
- Hyungkyu Moon
- Myung-Seok Choi
https://pubs.rsc.org/en/journals/journalissues/nj#!issueid=nj044013&type=current&issnprint=1144-0546
Image created by minjeong Kim / Nanosphere
RSC_New Journal of Chemistry _Front cover Picture
07 April 2020, Issue 13
Page 4963 to 5166
Coumarin–tetraphenylethylene regioisomers: synthesis, photophysical and aggregation-induced emission properties
Coumarin–tetraphenylethylene (CTPE) regioisomers with different linkage types (single-bond, vinyl, and acetylene) and substitution positions (coumarin C5, C6, C7) were synthesized and characterized using 1H NMR, 13C NMR, and high-resolution mass spectroscopy. The effects of substitution position and conjugation in CTPEs 1–9 on absorption, fluorescence, and aggregation-induced emission enhancement were explored. Electronic absorption and emission spectra indicate that CTPEs with C7 substitution are red-shifted compared to those substituted at C5 or C6. CTPEs 1–9 form aggregates in tetrahydrofuran/water (1 : 99, v/v) and exhibit aggregation-induced emission. Nanoaggregates were characterized using scanning electron microscopy and dynamic light scattering. The structure of CTPE 1 was confirmed by single crystal X-ray diffraction analysis
https://pubs.rsc.org/en/journals/journalissues/nj#!issueid=nj044013&type=current&issnprint=1144-0546
Image created by minjeong Kim / Nanosphere