三氧化二铁(Fe₂O₃),通常被称为氧化铁或红铁粉,是一种重要的无机化合物,在多个领域中有着广泛的应用。
主要用途虽然氧化铁在许多应用中是安全的,但长期暴露于高浓度的三氧化二铁粉尘下可能对人体产生不良影响。因此,在生产和使用过程中需要注意防护措施,并遵循相关的安全规范和标准。
总之,三氧化二铁因其独特的物理化学性质而被广泛应用于多个行业领域。正确的制备方法、合理的用途选择以及严格的安全管理是确保其有效利用的关键所在。
This study explores the synthesis of cyclopenta‐fused polyaromatic hydrocarbons (CP‐PAHs) via Pt‐catalyzed cyclization in water, focusing on the formation of fused pentagonal rings within heavily fused PAH frameworks. Utilizing platinum catalysts at lower temperatures (200‐260°C) in water, led to the successful synthesis of singly cyclized CP‐PAHs. The reaction conditions facilitated the mono‐cyclization of substrates such as dibenzo[g,p]chrysene and its isomers, yielding the desired products while suppressing the formation of bis‐cyclized compounds. The use of Fe2O3 as an additive in conjunction with PtO2 was effective to suppress hydrogenation of the substrates and products. The products exhibited a redshift in UV‐visible absorption and photoluminescence bands due to a decrease in the HOMO–LUMO energy gap. These findings highlight the potential of Pt‐catalyzed cyclization for the controlled synthesis of CP‐PAHs, with implications for various applications in materials science.