【摘要】 利用水热法合成出NH4Y3F10多孔纳米晶。由于Y3+离子的激发态能量可以转移给具有较高振动能的有机分子,因此这些多孔纳米晶可以作为基质辅助激光解析电离飞行时间质谱的基体材料,用于检测小分子和聚乙二醇。通过与商品化的基体材料(CHCA、DHB)对比,证明NH4Y3F10多孔纳米晶是一种性能优异的基体材料。这种新型基体材料已经成功应用于有机分子、小肽、C60、缺氧诱导因子(HIFs)和聚乙二醇的分子量的检测,显示出这种基体材料具有广泛的应用前景。更多还原

【Abstract】 Mesoporous NH4Y3F10 nanocrystals were fabricated to serve as a background-free matrix for analysis of small molecules and polyethylene glycols (PEGs) by matrix assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS). The excited state of yttrium ions can transfer energy to high-energy vibrations of organic molecules, which provides the potential technological application in MALDI-TOF-MS analysis of small molecules and PEGs. The advantage of this matrix in comparison with α-cyano-4-hydroxycinnamic acid (CHCA) and 2,5-dihydroxybenzoic acid (DHB) was demonstrated by MALDI-TOF-MS analysis of a peptide mixture. The efficiency of the mesoporous NH4Y3F10 nanocrystals as a novel matrix of low molecular weight compounds was verified by analysis of small peptide, organic compounds, C60 and hypoxia-inducible factors (HIFs). This matrix is also successfully used for analysis of PEGs (PEG 8000 and PEG 15000), suggesting a potential for monitoring reactions and for synthetic polymers quality control.更多还原