AI Article Synopsis
- A new method is introduced for creating highly fluorescent near-infrared aza-BODIPY dyes, achieving fluorescence quantum yields as high as 0.81 in toluene.
- This method relies on limiting the rotation of 1,7-phenyl groups by adding bulky substituents, reducing nonradiative relaxation and enhancing fluorescence.
- X-ray diffraction studies verify the large torsion angles between the 1,7-phenyl groups and the aza-BODIPY core, confirming the structural changes in these dyes.
Article Abstract
A simple approach to the highly fluorescent near-infrared aza-BODIPY dyes with higher fluorescence quantum yields (up to 0.81 in toluene) in comparison with their known analogues is presented. Our approach is based on the restricted rotations of the 1,7-phenyl groups to the mean plane of the aza-BODIPYs, which is achieved through the installation of bulky substituents on the 1,7-phenyl groups of aza-BODIPYs and results in a reduced nonradiative relaxation process in solution. The large torsion angles between the 1,7-phenyl groups and the aza-BODIPY core (ϕ1 and ϕ2 in these novel conformationally restricted aza-BODIPYs) were confirmed by X-ray diffraction studies.
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| http://dx.doi.org/10.1002/asia.201301362 | DOI Listing |
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