Search for: All records | NSF Public Access

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

Magic Angle Spinning Solid-State ¹³ C Photochemically Induced Dynamic Nuclear Polarization by a Synthetic Donor–Chromophore–Acceptor System at 9.4 T

https://doi.org/10.1021/acs.jpclett.4c01121

De_Biasi, Federico; Hope, Michael A; Qiu, Yunfan; Brown, Paige J; Visegrádi, Máté; Ouari, Olivier; Wasielewski, Michael R; Emsley, Lyndon (May 2024, The Journal of Physical Chemistry Letters)

Full Text Available
Thermally Controlled Exciplex Fluorescence in a Dynamic Homo[2]catenane

https://doi.org/10.1021/jacs.2c10591

Garci, Amine; David, Arthur H.; Le Bras, Laura; Ovalle, Marco; Abid, Seifallah; Young, Ryan M.; Liu, Wenqi; Azad, Chandra S.; Brown, Paige J.; Wasielewski, Michael R; et al (December 2022, Journal of the American Chemical Society)

Full Text Available
Alkoxy-Substituted Quadrupolar Fluorescent Dyes

https://doi.org/10.1021/jacs.2c04906

Feng, Yuanning; Das, Partha Jyoti; Young, Ryan M.; Brown, Paige J.; Hornick, Jessica E.; Weber, Jacob A.; Seale, James S.; Stern, Charlotte L.; Wasielewski, Michael R.; Stoddart, J. Fraser (September 2022, Journal of the American Chemical Society)

Full Text Available
Aggregation‐Induced Emission and Circularly Polarized Luminescence Duality in Tetracationic Binaphthyl‐Based Cyclophanes

https://doi.org/10.1002/anie.202208679

Garci, Amine; Abid, Seifallah; David, Arthur H. G.; Codesal, Marcos D.; Đorđević, Luka; Young, Ryan M.; Sai, Hiroaki; Le Bras, Laura; Perrier, Aurélie; Ovalle, Marco; et al (August 2022, Angewandte Chemie International Edition)

Abstract Here, we report an approach to the synthesis of highly charged enantiopure cyclophanes by the insertion of axially chiral enantiomeric binaphthyl fluorophores into the constitutions of pyridinium‐based macrocycles. Remarkably, these fluorescent tetracationic cyclophanes exhibit a significant AIE compared to their neutral optically active binaphthyl precursors. A combination of theoretical calculations and time‐resolved spectroscopy reveal that the AIE originates from limited torsional vibrations associated with the axes of chirality present in the chiral enantiomeric binaphthyl units and the fine‐tuning of their electronic landscape when incorporated within the cyclophane structure. Furthermore, these highly charged enantiopure cyclophanes display CPL responses both in solution and in the aggregated state. This unique duality of AIE and CPL in these tetracationic cyclophanes is destined to be of major importance in future development of photonic devices and bio‐applications.
more » « less