Formation of a Nonlinear Optical Host-Guest Hybrid Material by Tight Confinement of LDS 722 into Aluminophosphate 1D Nanochannels

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• 作者：Rebeca Sola-Llano ; Dr. Virginia Martí ; nez-Martí ; nez ; Dr. Yasuhiko Fujita ; Dr. Luis Gó ; mez-Hortigü ; ela ; Dr. Almudena Alfayate ; Prof. Hiroshi Uji-i ; Prof. Eduard Fron ; Prof. Joaquí ; n Pé ; rez-Pariente and Prof. Iñ ; igo Ló ; pez-Arbeloa
• 刊名：Chemistry - A European Journal
• 出版年：2016
• 出版时间：October 24, 2016
• 年：2016
• 卷：22
• 期：44
• 页码：15700-15711
• 全文大小：2943K
• ISSN：1521-3765

文摘

In this work, hemicyanine dye LDS 722 is encapsulated into the 1D elliptical nanochannels of MgAPO-11 aluminophosphate by a crystallization inclusion method. The synthesis of the hybrid material has been optimized through a systematic variation of the crystallization conditions in order to obtain pure and large crystals (around 20 μm×30 μm) suitable for optical applications. The tight fitting between the molecular size of the guest dye and the pore dimensions of the host has favored a rigid planar conformation of the dye, restricting its inherent flexibility, which is confirmed by molecular simulations. Consequently, the encapsulation of LDS 722 into MgAPO-11 has led to an astonishing enhancement of the fluorescence with respect to the dye into MgAPO-5, with slightly larger cylindrical channels, and with respect to the dye in solution. Moreover, the perfect alignment of LDS 722 (dye with intrinsic nonlinear-optical properties) along the channels of MgAPO-11 has revealed attractive second-order nonlinear properties, such as second harmonic generation, proven through microscopy measurements in single crystals.