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首页> 外文期刊>Advanced Functional Materials >Optical Power Limiters Based on Colorless Di-, Oligo-, and Polymetallaynes: Highly Transparent Materials for Eye Protection Devices
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Optical Power Limiters Based on Colorless Di-, Oligo-, and Polymetallaynes: Highly Transparent Materials for Eye Protection Devices

机译：基于无色双金属，寡金属和多金属锰的光功率限制器：高度透明的护眼设备材料

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摘要

The synthesis, characterization, and photophysics of a series of solution-processable and tractable di-, oligo-, and polymetallaynes of some group 10-12 transition metals are presented. Most of these materials are colorless with very good optical transparencies in the visible spectral region and exhibit excellent optical power limiting (OPL) for nanosecond laser pulse. Their OPL responses outweigh those of the state-of-the-art reverse saturable absorption dyes such as C_(60), metalloporphyrins, and me-tallophthalocyanines that are all associated with very poor optical transparencies. On the basis of the results from photophysical studies and theoretical calculations, both the absorption of triplet and intramolecular charge-transfer states can contribute to the enhancement of the OPL properties for these materials. Electronic influence of the type, spatial arrangement, and geometry of metal groups on the optical transparencyonlinearity optimization is evaluated and discussed in detail. The positive contribution of transition metal ions to the OPL of these compounds generally follows the order: Pt > Au > Hg > Pd. The optical-limiting thresholds for these polymetallaynes can be as low as 0.07 Jcm~(-2) at 92% linear transmittance and these highly transparent materials manifest very impressive figure of merit σ_(ex)/σ_o values (up to 22.48), which are remarkably higher than those of the benchmark C_(60) and metal phthalocyanine complexes. The present work demonstrates an attractive approach to developing materials offering superior OPL/optical transparency trade-offs and these metallopolyynes are thus very promising candidates for use in practical OPL devices for the protection of human eyes and other delicate optical sensors.
机译：提出了一系列可溶液处理和易处理的10-12族过渡金属的二金属，低聚金属和多金属戊烯的合成，表征和光物理。这些材料大多数都是无色的，在可见光谱范围内具有非常好的光学透明性，并且对于纳秒激光脉冲显示出出色的光功率限制（OPL）。它们的OPL反应优于最先进的反向饱和吸收染料，例如C_（60），金属卟啉和金属酞菁，它们都与非常差的光学透明性有关。根据光物理研究和理论计算的结果，三重态和分子内电荷转移态的吸收都可以有助于提高这些材料的OPL性能。评估并详细讨论了金属基团的类型，空间排列和几何形状对光学透明度/非线性优化的电子影响。过渡金属离子对这些化合物的OPL的正贡献通常遵循以下顺序：Pt> Au> Hg> Pd。在92％的线性透射率下，这些多金属戊二烯的光学极限阈值可低至0.07 Jcm〜（-2），这些高度透明的材料表现出非常令人印象深刻的品质因数σ_（ex）/σ_o值（高达22.48），明显高于基准C_（60）和金属酞菁配合物。本工作展示了一种有吸引力的方法，可以开发出具有出色的OPL /光学透明性折衷的材料，因此，这些金属聚炔非常适合用于保护人眼和其他精密光学传感器的实用OPL设备。

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