Tris (2,2′-bipyridine) ruthenium (II) cations as photoprobes of clay tactoid architecture within hectorite and laponite films

被引：59

作者：

Hagerman, ME ^{[1
]}

Salamone, SJ ^{[1
]}

Herbst, RW ^{[1
]}

Payeur, AL ^{[1
]}

机构：

[1] Union Coll, Dept Chem, Schenectady, NY 12308 USA

来源：

CHEMISTRY OF MATERIALS | 2003年 / 15卷 / 02期

关键词：

D O I：

10.1021/cm0209160

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption and intercalation of the cationic luminescence probe, tris(2,2'-bipyridine)ruthenium(II) complex ([Ru(bpy)(3)](2+) or Rubpy), into hectorite and Laponite host clay films were investigated. Because the photophysical properties of Rubpy are strongly influenced by the lamellar nanospace of the smectite host, Rubpy serves as a unique photoprobe of host-guest and guest-guest interfaces within inorganic-organic nanocomposites. The stacking patterns of the host tactoids influence guest luminescence through direct mediation of ion clustering and self-quenching phenomena. Spectral red shift of emission wavelengths and decreased lifetimes were observed with increased guest loading. The extent of red shift in the Rubpy/Laponite films indicated a more fluid guest microenvironment. Rubpy/Laponite films exhibit enhanced potential for photonic and sensor applications with increased optical transparency, intense luminescence, and longer luminescence lifetimes. Cointercalation of the cationic surfactant, trimethylcetylammonium cation, promotes two-dimensional tiling of Laponite tactoids and may afford selective tuning of fluorophore packing.

引用

页码：443 / 450

页数：8

共 69 条

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