基于罗丹明 6G、改性层状硅酸盐和有机溶剂的高荧光胶体。

Highly fluorescent colloids based on rhodamine 6G, modified layered silicate, and organic solvent.

机构信息

Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia.

出版信息

J Colloid Interface Sci. 2012 Dec 15;388(1):15-20. doi: 10.1016/j.jcis.2012.08.020. Epub 2012 Aug 24.

DOI:10.1016/j.jcis.2012.08.020

PMID:22995248

Abstract

Synthetic layered silicate saponite was modified with dodecyltrimethylammonium (C12), octadecyltrimethylammonium (C18), and dioctadecyldimethylammonium (2C18) cations for use as sorbents of the laser dye, rhodamine 6G (R6G). Via solvent exchange, transparent colloids in xylene were prepared and investigated using absorption and fluorescence spectroscopies. Molecular aggregation and partial quenching of the fluorescence were observed for the colloids based on 2C18 cations. Maximal fluorescence yields were observed for the colloids with C12 and C18 cations. Transparent gels without an apparent loss of luminescent efficiency could be prepared by concentrating the colloids. These highly fluorescent colloids and gels represent new types of materials with interesting optical properties.

摘要

合成层状硅酸盐皂石用十二烷基三甲基铵（C12）、十八烷基三甲基铵（C18）和双十八烷基二甲基铵（2C18）阳离子进行改性，用作激光染料罗丹明 6G（R6G）的吸附剂。通过溶剂交换，在二甲苯中制备透明胶体，并通过吸收和荧光光谱进行研究。基于 2C18 阳离子的胶体观察到分子聚集和荧光部分猝灭。对于含有 C12 和 C18 阳离子的胶体，观察到最大的荧光产率。通过浓缩胶体可以制备出无明显发光效率损失的透明凝胶。这些高荧光胶体和凝胶代表了具有有趣光学性质的新型材料。