Visible light excitation and near-infrared luminescence of organo-lanthanide hybrids with mesoporous silica through 9-hydroxyphenalen-l-one linkage

摘要

A new functional chemical linkage HPNPSi is synthesized from modification of 9-hydroxyphenalen-l-one (HPNP) with 3-(triethoxysilyi)propyl isocyanate (TEP1C). Two kinds of binary and ternary organo-lanthanide (Nd~(3+) or Yb~(3+)) hybrid material (Ln-HPNPSi and phen-Ln-HPNPSi) have been constructed using HPNPSi as a bridge and 1,10-phenanthroline (phen) as assistant ligand. Furtherly, organo-lanthanide hybrids of mesoporous silica (SBA-15 type, denoted as phen-Ln-HPNP-Si-15) are synthesized by co-condensation of tetraethoxysilane (TEOS) and HPNPSi linkage in the presence of Pluronic PI 23 surfactant as a template. The detailed physical characterization and especially the photoluminescence properties of these hybrid materials have been studied in detail, revealing that they all have high surface area, uniform in the mesostructure. Besides, all these organo-lanthanide hybrid materials exhibit the characteristic NIR luminescence of Nd~(3+) and Yb~(3+) under the exciation at visible region. The photo conversion between the visible and NIR light can be expected to have potential application in the practial fields.