Study of tribenzo[b,d,f]azepine as donor in D-A photocatalysts.

chemistry Medicinal and pharmaceutical chemistry Nano- and molecular-scale electronics Nano-biomaterials and bioscience Nanomagnetics Nanomaterials, thin films and nanointerfaces Nanomedicine Nanometrology and nanomechanics Nano-optics Nanopatterning, self-assembly and nanofabrication Nanostructures for energy and sensing applications Natural products chemistry Organo main group chemistry Other nanotechnology (unclassified) Other organic chemistry (unclassified) Photochemistry and photovoltaics Physical organic chemistry Supramolecular chemistry Since the discovery of donor-acceptor (D-A) type molecules in the field of material science, they have found great applicability in the field of photocatalysis. Most of these compounds are based on complex D-A-D structures or multi-D-A systems, such as the 4CzIPN. Whereas these systems have been widely studied and applied as photocatalysts, simpler D-A structures remain less explored. Nevertheless, the simplicity of D-A structures makes them the ideal structures to further understand the structure-property relationship of donor-acceptor (D-A) molecules for optimizing their photocatalytic performance by simpler modification of the different D-A subunits. In particular, D-A structures featuring sulfur-based acceptors and nitrogen donors have gained increasing attention for their use as photoredox catalysts. This study introduces a new family of D-A molecules by exploring various sulfur-based acceptors and nitrogen donors, including a novel tribenzo[b,d,f]azepine (TBA) unit and 5H-dibenz[b,f]azepine (IMD). Our findings demonstrate that these simple D-A structures exhibit promising photocatalytic properties, comparable to those of more complex D-A-D systems.

donor-acceptor system; photoredox catalysis; organic photocatalyst; photocatalyst design | Format: PDF | Size: 3.9 MB | Download | When a peer-reviewed version of this preprint is available, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information: Medrano-Uribe, K.; Humbrías-Martín, J.; Dell'Amico, L. Beilstein Arch. 2025, 202511. doi:10.3762/bxiv.2025.11.v1 Citation data can be downloaded as file using the "Download" button or used for copy/paste from the text window below. Citation data in RIS format can be imported by all major citation management software, including EndNote, ProCite, RefWorks, and Zotero. © 2025 Medrano-Uribe et al.; licensee Beilstein-Institut. This is an open access work licensed under the terms of the Beilstein-Institut Open Access License Agreement (https://www.beilstein-archives.org/xiv/terms), which is identical to the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0). The reuse of material under this license requires that the author(s), source and license are credited. Third-party material in this work could be subject to other licenses (typically indicated in the credit line), and in this case, users are required to obtain permission from the license holder to reuse the material.