倍半硅氧烷
丙二腈
热稳定性
荧光
吸附
纳米孔
热分解
材料科学
发色团
猝灭(荧光)
聚合物
光化学
化学
物理化学
有机化学
纳米技术
催化作用
物理
量子力学
作者
Yizhou Yan,Huizhong Yang,Hongzhi Liu
标识
DOI:10.1016/j.snb.2020.128154
摘要
2-(2,6-bis((E)-4-(diphenylamino)styryl)-1-methylpyridin-4(1 H)-ylidene)malononitrile (TPA-TCMP) offering aggregation-induced emission(AIE) with practical fluorescence efficiency was easily transformed from 2-(2,6-bis(4-(diphenylamino)stryryl-4H-pyranylidene)malononitrile (TPA-DCM) which suffers from aggregation-caused quenching (ACQ) by replacing oxygen atom with methylamine group. Subsequently, a hybrid fluorescent nanoporous material (THPP) was prepared by Friedel-Crafts reaction of TPA-TCMP with octavinylsilsesquioxane, [vinylSiO1.5]8 (OVS). THPP possesses a good porosity with a high surface area of 620 m2 g−1, a large pore volume of 0.54 cm3 g−1. It also displays a high thermal stability with 5 % mass loss thermal decomposition temperature above 400 °C in N2 atmosphere and a good pH stability ranging from 4–9. More importantly, it offers a large Stokes shift of 180 nm. The adsorption of Ru3+ on THPP dramatically quenches the fluorescence emission allowing the efficient detection of Ru3+with high selectivity, and the detection limit (LOD) is calculated to be 5.2 × 10−6 mol L−1. Moreover, THPP can adsorb Ru3+ with an equilibrium adsorption capacity of 208 mg g−1.
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