Author/Authors :
Hiromitsu، نويسنده , , Ichiro and Ikeue، نويسنده , , Takahisa and Karino، نويسنده , , Kazuhiro and Ohno، نويسنده , , Takatsugu and Tanaka، نويسنده , , Senku and Shiratori، نويسنده , , Hideo and Morito، نويسنده , , Shigekazu and Fujita، نويسنده , , Yasuhisa and Handa، نويسنده , , Makoto، نويسنده ,
Abstract :
The optical absorption and photoluminescence measurements were carried out for ZnO nanoparticle–tetraphenylporphyrin (TPP) systems made of four kinds of TPP’s with and without p-aminophenyl groups. The ZnO particles were treated with l-cysteine in order to make a ZnO–(l-cysteine)–TPP binding. However, this binding was not formed because of an absence of the ZnO–(l-cysteine) binding. In the case of metal-free TPP’s, the central hydrogen atoms of the TPP ring were replaced by a Zn atom during an aging of 2–4 weeks. An energy transfer from photoexcited ZnO to TPP occurs by a collision between ZnO and TPP in the dispersed medium.
