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Abstract：
A stable crystalline organic porous salt (CPOSs-NXU-1) with 1D apertures has been assembled by the solvothermal method, which shows high-sensitivity \"turn-on\" fluorescence detection and large-capacity adsorption of As(III) ions in water. The detection limits, saturated adsorption capacity, and removal rate of CPOSs-NXU-1 for As(III) ions in an aqueous solution can reach 74.34 nm (5.57 ppb), 451.01 mg g-1, and 99.6%, respectively, at pH = 7 and room temperature. With the aid of XPS, IR, Raman, and DFT theoretical calculations, it is determined that CPOSs-NXU-1 adsorbed As(III) ions in the form of H2AsO3 - and H3AsO3 through hydrogen bonding between the host and guest. The mechanism for fluorescence sensitization of As(III) ions to CPOSs-NXU-1 is mainly to increase the energy level difference between the ground state and excited state investigated by UV-vis absorption spectra, UV-vis diffuse reflectance spectra, and theoretical calculations. By constructing fluorescent CPOSs, an integrated solution has been achieved to treating As(III) contamination in the water that is equipped with detection and removal. These results blaze a promising path for addressing trivalent arsenic contamination in water efficiently, rapidly, and economically.
摘要：
通过溶剂热法组装了具有一维孔径的稳定结晶有机多孔盐（CPOSs-NXU-1），具有高灵敏度的“开启”荧光检测和对水中As（III）离子的大容量吸附。检测限，饱和吸附容量，CPOSs-NXU-1对水溶液中As(III)离子的去除率可达74.34nm(5.57ppb),451.01mgg-1，99.6%，分别,在pH=7和室温下。借助XPS,IR,拉曼,和DFT理论计算，确定CPOSs-NXU-1通过主体和客体之间的氢键以H2AsO3-和H3AsO3形式吸附As（III）离子。As(III)离子对CPOSs-NXU-1的荧光增敏机理主要是增加紫外可见吸收光谱研究的基态和激发态的能级差,紫外-可见漫反射光谱,和理论计算。通过构建荧光CPOS，已经实现了一种集成的解决方案来处理水中的As（III）污染，该解决方案具有检测和去除功能。这些结果为有效解决水中三价砷污染开辟了一条有希望的途径，迅速,和经济上。
