S/Se-Annulated Star-Shaped Perylene Diimides (PDIs) with Large Two-Photon Absorption (TPA) Cross-Section in NIR-I Region.

Autor: Li D; Shandong Normal University, College of Chemistry, Chemical Engineering and Materials Science, CHINA., Zhao W; Shandong Normal University, College of Chemistry, Chemical Engineering and Materials Science, CHINA., Li G; Shandong Normal University, College of Chemistry, Chemical Engineering and Materials Science, CHINA., Xu Y; Shandong Normal University, College of Chemistry, Chemical Engineering and Materials Science, CHINA., Xu L; Southwest Petroleum University, School of New Energy and Materials, CHINA., Tang B; Shandong Normal University, Chemistry, No.88 Wenhua East Road, 250014, Jinan, CHINA.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2024 Nov 21, pp. e202403510. Date of Electronic Publication: 2024 Nov 21.
DOI: 10.1002/chem.202403510
Abstrakt: Two-photon absorption (TPA) has attracted growing attention over recent years owing to the wide range of applications in organic nonlinear optical (NLO) materials. The quantitative sensitivity of a two-photon molecular entity is determined by its TPA cross-section (δTPA). Perylene diimides (PDIs) are excellent n-type organic semiconductor materials demonstrating distinguished thermal, optical, and chemical stability. Nonetheless, PDIs-based scaffolds exhibit poor δTPA  in the NIR-I region (700-900 nm) due to the lack of suitable molecular design. Here, two novel star-shaped PDIs fluorophores, namely PDI-S and PDI-Se, were constructed by four periphery S/Se-fused PDIs connected with bicarbazole core. PDI-S manifested excellent δTPA of 3775 GM, which are among the highest values reported for PDIs excited in the NIR-I region.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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