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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Aggregation effects in non-linear absorption of CuPc-SiO2 sono-xerogels
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Aggregation effects in non-linear absorption of CuPc-SiO2 sono-xerogels

机译：CuPc-SiO2声干凝胶非线性吸收中的聚集效应

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摘要

It is known that aggregation effects in metallophthalocyanine/SiO2 composites play an important role in the optical properties of these materials. With the aim to avoid phthalocyanine dimer and oligomer formation induced in aqueous solution, alternative processing methods for trapping the organic in the matrices have been tested. The combination of ultrasonic energy used to promote the reactions and the methanol used as solvent, makes it possible to obtain monolithic xerogels under extremely acid conditions, preserving their homogeneity and transparency. Textural parameters and pore size distribution of the composites and the optical absorption features have been evaluated. Finally, the effects of molecular self-association degree on the non-linear absorption of the samples have been analyzed. All the samples studied exhibit reverse saturable absorption behavior but the figure of merit is strongly determined by the aggregation state of the active phase in the composite. (C) 2003 Elsevier B.V. All rights reserved. [References: 22]
机译：已知金属酞菁/ SiO 2复合材料中的聚集效应在这些材料的光学性质中起重要作用。为了避免在水溶液中诱导生成酞菁二聚体和低聚物，已经测试了将有机物捕获在基质中的替代处理方法。用于促进反应的超声能与用作溶剂的甲醇相结合，可以在极端酸性条件下获得整块干凝胶，并保持其均质性和透明性。已经评估了复合材料的质地参数和孔径分布以及光学吸收特征。最后，分析了分子自缔合度对样品非线性吸收的影响。所有研究的样品均表现出反向饱和吸收行为，但品质因数强烈取决于复合物中活性相的聚集状态。 （C）2003 Elsevier B.V.保留所有权利。 [参考：22]

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