Related Experiment Video
Updated: Aug 6, 2026
13:56
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Design rules for tuning charge-transfer emission in donor-acceptor nanohoops
Gabriela M Bailey1, Ethan Q Nguyen1, Melanie A Sheldon1
1Department of Chemistry and Biochemistry, Materials Science Institute, and Knight Campus for Accelerating Scientific Impact, University of Oregon Eugene Oregon 97403 USA rjasti@uoregon.edu.
Chemical Science
|July 17, 2026
Summary
Donor-acceptor nanohoops offer tunable fluorescence by altering molecular structure and charge-transfer interactions. This modular synthesis approach allows predictable control over emission colors and properties in curved π-systems.
Area of Science:
- Organic Chemistry
- Materials Science
- Photophysics
Background:
- Donor-acceptor (D-A) nanohoops are curved π-systems with tunable emission properties.
- Charge-transfer (CT) interactions and frontier molecular orbital modulation are key to controlling emission.
Purpose of the Study:
- To develop a modular synthetic strategy for D-A nanohoops.
- To conduct a systematic structure-property study of D-A nanohoops incorporating benzothiadiazole (BT) and thiophene (thio).
- To establish design rules for predictable tuning of fluorescent emission.
Main Methods:
- Modular synthesis of D-A nanohoops with varying ring sizes, D-A connectivity, and donor content.
- Experimental characterization of photophysical properties (fluorescence emission, Stokes shifts, solvatofluorochromism).
- Computational analysis including StrainViz calculations.
Main Results:
- Predictable tuning of fluorescent emission across the visible spectrum was achieved.
- Large effective Stokes shifts and pronounced solvatofluorochromism were observed.
- Design rules were established: increased acceptor strain, direct D-A connectivity, and more electron-modulating units lead to bathochromic emission shifts.
Conclusions:
- D-A nanohoops provide a predictive platform for engineering curved π-systems.
- The study demonstrates control over photophysical properties through systematic structural modifications.
- Findings enable access to highly red-shifted emission through optimized D-A nanohoop design.
