Department of Chemistry, FFCLRP-USP, Av. dos Bandeirantes, 3900, CEP 14040-901 Ribeirão Preto, SP, Brazil.
J Fluoresc. 2010 May;20(3):739-43. doi: 10.1007/s10895-010-0616-2. Epub 2010 Feb 24.
Luminescent zinc-based hybrid inorganic-organic films with rare-earth (RE) complexes have been prepared using a non-alkoxide sol-gel process. The films were fabricated by the dip-coating method starting from zinc acetate dihydrate, rare earth chloride, lactic acid as hydrolytic catalyst, and anhydrous ethanol. The beta-diketones thenoylltrifluoroacetone (Httfa) and dibenzoylmethane (Hdbm) were used as ligands to Eu(3+) and Tb(3+), respectively. After deposition of the first layer, the films were fired at temperatures between 50 and 300 degrees C, in air. Photophysical properties such as excitation, emission and emission, lifetimes were determined for the films obtained in different conditions. Eu(3+)/ttfa and Tb(3+)/dbm films fired at 300 and 250 degrees C, respectively, are still transparent and gave rise to intense emission when excited through the ligand (antenna effect).
采用非醇盐溶胶-凝胶法制备了具有稀土（RE）配合物的发光锌基杂化无机-有机薄膜。薄膜通过从二水合乙酸锌、稀土氯化物、乳酸作为水解催化剂和无水乙醇开始的浸渍涂层法制备。然后，β-二酮噻吩酰三氟丙酮（Httfa）和二苯甲酰甲烷（Hdbm）分别用作 Eu（3+）和 Tb（3+）的配体。沉积第一层后，将薄膜在空气在 50 至 300 摄氏度之间的温度下烧制。在不同条件下获得的薄膜的光物理性质，如激发、发射和发射寿命进行了测定。在 300 和 250 摄氏度下烧制的 Eu（3+）/ttfa 和 Tb（3+）/dbm 薄膜仍然是透明的，并在通过配体（天线效应）激发时产生强烈的发射。
