Journal
SCIENCE CHINA-CHEMISTRY
Volume 65, Issue 1, Pages 135-144Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-021-1083-4
Keywords
molecular interactions; fluorescence behaviors; AIEgens; aggregates
Categories
Funding
- National Natural Science Foundation of China [21788102, 52003228]
- Innovation and Technology Commission [ITC-CNERC14SC01]
- Research Grants Council of Hong Kong [16307020, C6009-17G, N-HKUST609/19]
- Natural Science Foundation of Guangdong Province [2019B121205012]
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The study synthesizes three red luminogens with subtle structural variation and investigates the influence of molecular interactions on their luminescent behavior in solution and aggregate states. Strong pi-pi and D-A interactions cause a redshift in emission, while weak interactions enhance the quantum yield. This work provides insights into the complicated influence of various molecular interactions on luminescent behavior.
Molecular interactions are crucial in diverse fields of protein folding, material science, nanotechnology, and life origins. Although mounting experimental research controls luminescent behavior by adjusting molecular interactions in light-emitting materials, it remains elusive to correlate microscopic molecular interactions with macroscopic luminescent behavior directly. Here, we synthesized three red luminogens with subtle structural variation and investigated the influence of molecular interactions on their luminescent behavior in solution and aggregate states. Our results indicate that strong pi-pi and D-A interactions in both dilute solution (between luminogen and solvent molecules) and aggregate (between luminogens) states cause the redshift in emission, while weak interactions ({tie.g.}, Van der Waals, C-HMIDLINE HORIZONTAL ELLIPSIS pi, and C-HMIDLINE HORIZONTAL ELLIPSISF interactions) enhance the quantum yield. This work provides a thoughtful investigation into the complicated influence of various molecular interactions on luminescent behavior.
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