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ACQ‐to‐AIE Transformation: Tuning Molecular Packing by Regioisomerization for Two‐Photon NIR Bioimaging.
- Source :
-
Angewandte Chemie International Edition . 7/27/2020, Vol. 59 Issue 31, p12822-12826. 5p. - Publication Year :
- 2020
-
Abstract
- The traditional design strategies for highly bright solid‐state luminescent materials rely on weakening the intermolecular π–π interactions, which may limit diversity when developing new materials. Herein, we propose a strategy of tuning the molecular packing mode by regioisomerization to regulate the solid‐state fluorescence. TBP‐e‐TPA with a molecular rotor in the end position of a planar core adopts a long‐range cofacial packing mode, which in the solid state is almost non‐emissive. By shifting molecular rotors to the bay position, the resultant TBP‐b‐TPA possesses a discrete cross packing mode, giving a quantum yield of 15.6±0.2 %. These results demonstrate the relationship between the solid‐state fluorescence efficiency and the molecule's packing mode. Thanks to the good photophysical properties, TBP‐b‐TPA nanoparticles were used for two‐photon deep brain imaging. This molecular design philosophy provides a new way of designing highly bright solid‐state fluorophores. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TELEOLOGY
*NANOPARTICLES
*BRAIN imaging
*FLUORESCENCE
*FLUOROPHORES
*PHOTONS
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 59
- Issue :
- 31
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 144685687
- Full Text :
- https://doi.org/10.1002/anie.202005785