A stable nanoscaled single-excitation ratiometric luminescent pH sensor (MPDB-PCN) over a broad pH range from 2.5 to 8.6 is fabricated through post-synthetic modification of PCN-224 with naphthalimide-derived molecules. Due to the rapid, sensitive and linear response to pH, MPDB-PCN is capable of detecting 3-nitropropionic acid (3-NPA), an acid neurotoxin in food safety, with a low detection limit of 15 μM in sugarcane juice.

中文翻译：

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一种稳定的纳米级Zr-MOF，用于通过pH调节的比例发光开关检测有毒的霉菌毒素。

通过用萘二甲酰亚胺衍生的分子对PCN-224进行后合成修饰，制得了稳定的纳米级单激发比例发光荧光pH传感器（MPDB-PCN），pH范围从2.5到8.6。由于对pH值具有快速，灵敏和线性的响应，因此MPDB-PCN能够检测3-硝基丙酸（3-NPA）（食品安全中的酸性神经毒素），对甘蔗汁的检测限仅为15μM。