卟啉铜接枝SiO_2有机-无机复合材料及强的非线性折射率

Metalloporphyrin bonded SiO_2 organic-inorganic materials and their strong nonlinear refractive index

通过卟啉配合物Meso-四(4-羧基苯基)卟啉铜(简称Cu(Ⅱ)-TCPP)中的羧基与γ-氨基丙基三乙氧基硅烷(NH2(CH2)3Si(OC2H5)3,KH550)中的氨基的相互化学作用,成功地把卟啉配合物接枝到KH550中,随着KH550中乙氧基的水解与聚合反应的进行,卟啉铜连接到固体介质中,从而大幅度提高了卟啉在无机固体介质中的掺杂浓度.将反应产物与γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷(CH2CHCH2O(CH2)3Si(OCH3)3,KH560)相杂化,形成物化性能良好、连接卟啉的有机-无机复合材料.用红外光谱表征了Cu(Ⅱ)-TCPP与KH550的化学反应产物,用紫外—可见吸收光谱研究Cu(Ⅱ)-TCPP的分子状态.应用Z扫描技术研究不同Cu(Ⅱ)-TCPP掺杂浓度的复合材料的非线性光学性质,其三介非线性折射率n2达-1.1161×10-16m2/W.

Copper metalloporphyrin was bonded to 3-aminopropltriethoxysilane （ NH2 （ CH2 ）3Si （ OC2H5 ）3,KH550 ） by the chemical reaction between the carboxyl group of Cu（ Ⅱ） meso-Tertra（4-carboxyphenyl） porphine （ Cu（ Ⅱ）-TCPP） and amino-group of KH550. The copper metalloporphyrin was connected to gel network after the hydrolysis and condensation of the product. The reaction product of different concentrations was hybridized with 3-glycidoxypropltrimethoxysilane （CH2OCHCH2O（CH2）3Si（OCH3）3,KH560） with sol-gel processing to form sol-gel inorganic material,which has good physical-chemical and optical properties. The cross-linkage of Cu（ Ⅱ）-TCPP and KH550 was estimated and confirmed with FT-IR spectroscopy. The state of metalloporphyrin molecules was investiaged by UV /VIS spectra. It was found that the Cu（Ⅱ）-TCPP exists mainly in the state of monomer. Nonlinear optical properties of samples was studied by Z-scan technique using Ti： Sapphire femto-second laser pluses. The nonlinear refractive index n2 reached-1. 1161 × 10-16 m2 /W.