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Notable Third-Order Optical Nonlinearities Realized in Layer-by-Layer Assembled Composite Films by Intercalation of Porphyrin/Polyoxometalate into Layered Double Hydroxide
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2016-09-22 00:00:00 , DOI: 10.1021/acs.jpcc.6b07695 Guanying Zhu 1 , Yi Long 1 , Haizhou Ren 1 , Yunshan Zhou 1 , Lijuan Zhang 1 , Zonghai Shi 1 , Farooq K. Shehzad 1 , Hafiz Muhammad Asif 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2016-09-22 00:00:00 , DOI: 10.1021/acs.jpcc.6b07695 Guanying Zhu 1 , Yi Long 1 , Haizhou Ren 1 , Yunshan Zhou 1 , Lijuan Zhang 1 , Zonghai Shi 1 , Farooq K. Shehzad 1 , Hafiz Muhammad Asif 1
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A series of uniform and smooth (TCPP/LDH)n films and (TCPP/P5W30/LDH)n films were fabricated with meso-tetrakis(p-carboxyphenyl)porphyrin (TCPP), Preyssler-type polyoxometalate K12.5Na1.5[NaP5W30O110]·15H2O (P5W30), and exfoliated Mg2Al–NO3 layered double hydroxide (LDH) monolayer nanaosheets by layer-by-layer assembly technique. The resulting films were characterized by UV–visible spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), and fluorescence spectroscopy. Their third-order nonlinear optical properties were studied by Z-scan measurement with laser pulse duration of 6–7 ns at a wavelength of 532 nm. The (TCPP/LDH)n films exhibit notable self-defocusing effect and saturated absorption effect which is different from TCPP solution. The optical nonlinearity of films becomes larger with the increase of the number of bilayers. The third-order nonlinear optical coefficient χ(3) of (LDH/TCPP)50/LDH is calculated to be (6.4 ± 0.18) × 10–11 esu. Remarkably, experimental results showed that the (LDH/P5W30/LDH/TCPP)n/LDH films exhibit much larger nonlinearity than that of the (LDH/TCPP)n/LDH films when n is the same, which is thought to result from the interlayered charge/energy transfer between porphyrin and polyoxometalate although the LDH sheet is electron-inert material.
中文翻译：
通过将卟啉/多金属氧酸盐插入层状双氢氧化物中实现多层组装复合膜中的显着三阶光学非线性
用介孔四（对羧基苯基）卟啉（Preyssler-type polyoxometalate K 12.5 Na 1.5）制备了一系列均匀且光滑的（TCPP / LDH）n膜和（TCPP / P 5 W 30 / LDH）n膜[NaP 5 W 30 O 110 ]·15H 2 O（P 5 W 30），以及剥落的Mg 2 Al–NO 3层状组装技术形成的双层双氢氧化物（LDH）单层纳米片。通过紫外可见光谱，扫描电子显微镜（SEM），原子力显微镜（AFM）和荧光光谱对所得膜进行表征。通过Z扫描测量，在532 nm波长下激光脉冲持续时间为6-7 ns，研究了它们的三阶非线性光学特性。（TCPP / LDH）n膜表现出明显的自散焦效果和饱和吸收效果，这与TCPP解决方案不同。膜的光学非线性随着双层数的增加而变大。计算出（LDH / TCPP）50 / LDH的三阶非线性光学系数χ （3）为（6.4±0.18）×10–11 esu。值得注意的是，实验结果表明，当n相同时，（LDH / P 5 W 30 / LDH / TCPP）n / LDH膜呈现出比（LDH / TCPP）n / LDH膜更大的非线性。尽管LDH片是电子惰性材料，但由于卟啉和多金属氧酸盐之间的层间电荷/能量转移而产生的结果。
更新日期：2016-09-22
中文翻译：
通过将卟啉/多金属氧酸盐插入层状双氢氧化物中实现多层组装复合膜中的显着三阶光学非线性
用介孔四（对羧基苯基）卟啉（Preyssler-type polyoxometalate K 12.5 Na 1.5）制备了一系列均匀且光滑的（TCPP / LDH）n膜和（TCPP / P 5 W 30 / LDH）n膜[NaP 5 W 30 O 110 ]·15H 2 O（P 5 W 30），以及剥落的Mg 2 Al–NO 3层状组装技术形成的双层双氢氧化物（LDH）单层纳米片。通过紫外可见光谱，扫描电子显微镜（SEM），原子力显微镜（AFM）和荧光光谱对所得膜进行表征。通过Z扫描测量，在532 nm波长下激光脉冲持续时间为6-7 ns，研究了它们的三阶非线性光学特性。（TCPP / LDH）n膜表现出明显的自散焦效果和饱和吸收效果，这与TCPP解决方案不同。膜的光学非线性随着双层数的增加而变大。计算出（LDH / TCPP）50 / LDH的三阶非线性光学系数χ （3）为（6.4±0.18）×10–11 esu。值得注意的是，实验结果表明，当n相同时，（LDH / P 5 W 30 / LDH / TCPP）n / LDH膜呈现出比（LDH / TCPP）n / LDH膜更大的非线性。尽管LDH片是电子惰性材料，但由于卟啉和多金属氧酸盐之间的层间电荷/能量转移而产生的结果。
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