Multichromophore systems (MCSs) are envisioned as building blocks of molecular optoelectronic devices. While it is important to understand the characteristics of energy transfer in MCSs, the effect of multiple donors on energy transfer has not been understood completely, mainly due to the lack of a platform to investigate such an effect systematically. Here, a systematic study on how the number of donors (nD) and interchromophore distances affect the efficiency of energy transfer (ηFRET) is presented. Specifically, ηFRET is calculated for a series of model MCSs using simulations, a series of multiporphyrin dendrimers with systematic variation of nD and interdonor distances is synthesized, and ηFRETs of those dendrimers using transient absorption spectroscopy are measured. The simulations predict ηFRET in the multiporphyrin dendrimers well. In particular, it is found that ηFRET is enhanced by donor-to-donor energy transfer only when structural heterogeneity exists in an MCS, and the relationships between the ηFRET enhancement and the structural parameters of the MCS are revealed.
Bibliographical noteFunding Information:
The authors thank Dae Won Cho and Jaeyoung Sung for their initial help and discussion on the project. This work was supported by the midcareer research project (No. 2020R1A2C3004520) of the National Research Foundation of Korea. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (No. NRF‐2016R1E1A1A01941978). This work was supported by Institute for Basic Science (No. IBS‐R004).
© 2020 The Authors. Published by Wiley-VCH GmbH
All Science Journal Classification (ASJC) codes
- Medicine (miscellaneous)
- Chemical Engineering(all)
- Materials Science(all)
- Biochemistry, Genetics and Molecular Biology (miscellaneous)
- Physics and Astronomy(all)