Synthesis of Latex Photocatalysts Loaded with Phthalocyanines and Their Applications

本课题的目的是：(1)合成负载酞菁的新型乳胶催化剂；(2)利用乳胶光催化剂高效分解环境污染物；(3)阐明乳胶光催化剂的催化活性机理。在项目期间，我们进行了以下实验：(1)铝酞菁配合物的合成：基于San Roman的方法（J. Photochem.）。Photobilol。合成了羟基铝三羧基单酰胺酞菁（hydroxyalum tricarboxymonoamide phthalocyanine, AlTCPc），并用元素分析、紫外- via和红外光谱对其进行了表征。此外，由于已知酞菁衍生物产生单线态氧的能力与其荧光量子产率直接相关，因此对荧光光谱进行了详细的检查。(2) AlTCPc在氨基乳胶上的负载：通过酰胺化反应将AlTCPc与聚苯乙烯乳胶颗粒表面的氨基结合，通过元素分析、ICP和IR光谱测定了AlTCPc在乳胶颗粒上的负载。(3)作为河流污染物模型化合物的伊红Y的分解：用胶乳光催化剂将伊红Y分解成水相分散体。与不含AlTCPc的乳胶体系相比，eosin Y的光降解能力显著增强。这一事实证明了乳液- altcpc体系作为光催化剂的实用性。伊红Y的光降解似乎是由于AlTCPc产生的单线态氧（II型机制）。为了证实这一点，我们将测定单线态氧的浓度并观察瞬态吸收光谱。此外，我们计划分解实际的河流污染物，如内分泌干扰物。

The purposes of this project are: (I) to synthesize novel latex catalysts loaded with phthalocyanines, (ii) to efficiently decompose environmental pollutants using the latex photocatlysts, and (iii) to elucidate the mechanisms of catalytic activities of the latex photocatalysts.During the term of the project, we Gave carried out the following experiments:(1) Synthesis of aluminum phothalocyanine complex: Based on San Roman's method (J. Photochem. Photobilol. B: Biol.1989, 3, 615), we synthesized hydroxyalminium tricarboxymonoamide phthalocyanine (AlTCPc), followed by characterization by elemental analysis, UV-Via and IR spectroscopy. Furthermore, fluorescence spectra were examined in detail since it is known that the ability of generating singlet oxygen of phthalocyanine derivatives is directly related to their fluorescence quantum yields.(2) Loading of AlTCPc on amino latex: We bound AlTCPc to the surface of polystyrene latex particles with amino groups by amidation reaction The mount of AlTCPc on the latex particles were determined by elemental analysis, ICP and IR spectroscopy.(3) Decomposition of eosin Y as a model compound of river pollutants: Eosin Y was decomposed by the latex photocatalyst in aqueous dispersions. Compared with a latex system without AlTCPc, photodegradeation of eosin Y was significantly enhanced. This fact demonstrates the usefulness of the latex-AlTCPc system as a photocatalyst. The photodegradation of eosin Y seems to be due to singlet oxygen generated by AlTCPc (Type II mechanism). To confirm this, we will determine the concentration of singlet oxygen and observe transient absorption spectra. Furthermore, we plan to decompose actual river pollutants such as endocrine disruptors.