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首页> 外文期刊>Chemistry: A European journal >Near-Infrared Croconaine Rotaxanes and Doped Nanoparticles for Enhanced Aqueous Photothermal Heating
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Near-Infrared Croconaine Rotaxanes and Doped Nanoparticles for Enhanced Aqueous Photothermal Heating

机译：近红外番红花轮烷和掺杂的纳米粒子增强水光热加热

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摘要

The photothermal effect is the generation of heat by molecules or particles upon high-energy laser irradiation, and near-infrared absorbers such as gold nanoparticles and organic dyes have a range of potential photothermal applications. The favourable photothermal properties of thiophene-functionalised croconaine dyes were recently discovered. The synthesis and properties of novel croconaine rotaxane and pseudorotaxane architectures capable of efficient photothermal performance in both organic and aqueous environments are reported. The versatility of this dye-encapsulation strategy was demonstrated by the preparation of two organic croconaine rotaxanes using different synthetic methods: the formation of an aqueous pseudorotaxane association complex, and the synthesis of water-soluble, croconaine-doped silicated micelle nanoparticles. All of these near-infrared-absorbing systems exhibit excellent photothermal behaviour, with pseudorotaxane and rotaxane formation vital for effective aqueous heat generation. Dye encapsulation provides steric protection to enhance the stability of a water-sensitive croconaine dye, while rotaxane-doped nanoparticles avoid detrimental band broadening caused by chromophore coupling.
机译：光热效应是在高能激光照射下分子或颗粒产生的热量，近红外吸收剂（如金纳米颗粒和有机染料）具有一系列潜在的光热应用。最近发现了噻吩官能化的可可碱染料的良好的光热性能。报道了能够在有机和水性环境中均具有有效的光热性能的新的可可宁轮烷和假轮烷构型的合成和性质。通过使用不同的合成方法制备两种有机croconaine rotaxanes，可以证明这种染料包封策略的多功能性：形成水性拟轮烷缔合复合物，以及水溶性，croconaine掺杂的二氧化硅胶束纳米颗粒的合成。所有这些近红外吸收系统均表现出出色的光热性能，假轮烷和轮烷的形成对于有效地产生水性热量至关重要。染料封装可提供空间保护，以增强水敏型可可宁染料的稳定性，而轮烷烷掺杂的纳米颗粒可避免因生色团偶联而造成的有害谱带展宽。

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