Construction of integrated dyes system within solid-state two-dimensional nanospace with using phyllosilicate/organic hybrids

通过将客体染料插层到香豆素/层状硅酸盐杂化固体二维纳米空间中，香豆素部分与层状硅酸盐部分共价锚定，从而实现了两种功能染料的集成。紫外线。可见光谱和X-射线衍射分析表明，客体染料与香豆素部分的摩尔比([Guest]/[Coum])在0.004~40mol/mol之间。荧光光谱显示香豆素部分和阵风染料都有荧光。此外，在香豆素/3，3‘-二乙氧基碳菁(DOC)集成体系中，由于集成香豆素/DOC体系中的能量传递，客体染料(DOC)甚至在320 nm处被激发而发射。能量传递和荧光强度的大小取决于[DOC]/[Coum]。所提出的一体化染色体系的荧光分子排列模型由香豆素部分组成，香豆素部分位于同一二维纳米空间中靠近和远离客体染料的位置，客体染料总是靠近香豆素部分。这些独特的荧光团排列允许集成香豆素/DOC体系的两种类型的荧光行为：(1)位于DOC附近的激发香豆素部分的荧光共振能量转移(FRET)和(2)辐射能量转移。

Two functional dyes were integrated by intercalating guest dyes into the solid-state two-dimensional nanospace of a coumarin/phyllosilicate hybrid, wherein the coumarin moiety was anchored covalently to the phyllosilicate moiety. Ultraviolet. visible spectroscopy and X-ray diffraction analysis showed that the mole ratios of the guest dye to the coumarin moiety([Guest]/[Coum]) ranged from 0.004to40mol/mol. Fluorescence spectroscopy revealed that both the coumarin moieties and gust dyes fluoresced. Furthermore, in the case of the integrated coumarin/3, 3'-diethyloxacarbocyanine(DOC) systems, the guest dye(DOC) even emited by excitation at320nm due to energy transfers within the integrated coumarin/DOC systems. The extent of the energy transfers and fluorescence intensities depended on[DOC]/[Coum]. The proposed models of the arrangements of the fluorophores for the integrated dyed systems consist of the coumarin moieties located on both close to and far from the guest dyes in the same two-dimensional nanospace with the guest dyes always in close proximity to a coumarin moiety. These unique arrangements of fluorophores allow two types of fluorescence behavior for the integrated coumarin/DOC systems :(1) fluorescence resonance energy transfer(FRET) from the excited coumarin moiety located close to DOC and(2) radiative energy transfer.