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Spermine-directed supramolecular self-assembly of water-soluble AIE-active tetraphenylethylene: nanobelt, nanosheet, globular and nanotubular structures.
- Source :
-
New Journal of Chemistry . 9/21/2018, Vol. 42 Issue 18, p15379-15386. 8p. - Publication Year :
- 2018
-
Abstract
- Tetrasulfonate-tetraphenylethylene (Su-TPE) is non-emissive in water and upon addition of a good solvent such as THF (fTHF = 95%) it displays strong fluorescence emission with a quantum yield of 6.33%. In the presence of spermine, emission of Su-TPE produces higher quantum yields i.e. 1 : 48 molecular ratio gives 7.21%. Furthermore, interaction of spermine with Su-TPE is also shown to be pH dependent. Scanning electron microscopy (SEM) of Su-TPE molecule self-assemblies demonstrates that it produces various supramolecular structures at different Su-TPE : spermine molecular ratios. Nanobelts were obtained at 1 : 12, evolving into microsheets at 1 : 24, microglobular morphology at 1 : 36 and microtubes at 1 : 48 molecular ratios, respectively. Additionally, enhanced fluorescence emission was observed upon increasing the molar ratio of spermine with Su-TPE at pH 7. The physical characterisation of the system was performed using dynamic light scattering and zeta potential measurements. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SPERMINE
*TETRAPHENYLETHYLENE
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 42
- Issue :
- 18
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 131701751
- Full Text :
- https://doi.org/10.1039/c8nj02636j