AI Article Synopsis
- * Perylene diimides (PDIs) are noted for their strong thermal, optical, and chemical stability as n-type organic semiconductors, but they usually have low δ values in the near-infrared region (NIR-I), limiting their effectiveness.
- * Two new star-shaped PDI fluorophores, PDI-S and PDI-Se, were developed, with PDI-S achieving an impressive δ of 3775 GM, among the highest for PDIs in the NIR-I region.
Article Abstract
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 (δ). Perylene diimides (PDIs) are excellent n-type organic semiconductor materials demonstrating distinguished thermal, optical, and chemical stability. Nonetheless, PDIs-based scaffolds exhibit poor δ 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 δ of 3775 GM, which are among the highest values reported for PDIs excited in the NIR-I region.
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Article Synopsis
- * Perylene diimides (PDIs) are noted for their strong thermal, optical, and chemical stability as n-type organic semiconductors, but they usually have low δ values in the near-infrared region (NIR-I), limiting their effectiveness.
- * Two new star-shaped PDI fluorophores, PDI-S and PDI-Se, were developed, with PDI-S achieving an impressive δ of 3775 GM, among the highest for PDIs in the NIR-I region.
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