A highly selective and sensitive fluorescent sensor based on a 1,8-naphthalimide with a Schiff base function for Hg<sup>2+</sup> in aqueous media
作者:Kaiyi Li、Ruixue Li、Xiaoxia Kong、Qinqin Shen、Tiantian Wan、Huilu Wu
DOI:10.1515/znb-2022-0044
日期:2022.9.27
sensitive response to Hg2+ (Ф Hg+HL/Ф HL = 2.28) over other metal ions (Na+, K+, Ca2+, Mg2+, Al3+, Pb2+, Fe3+, Ni2+, Zn2+, Cu2+, Ag+, Co2+, Cr3+, Mn2+ and Cd2+) in solution (DMF/Tris-HCl buffer, 1:1, v/v, pH = 7.2). The Hg2+-induced fluorescence enhancement at 526 nm is proportional to the concentration of Hg2+ in the range of 0.5–4.0 µm with a detection limit of 0.18 µm. Based on the fluorescence titration
一种新型荧光传感器,ñ-allyl-4-[(2-(3-methoxysalicylaldimino)ethylamino]-1,8-naphthalimide (HL),用于 Hg2+已经开发了席夫碱取代基作为识别基团。该传感器显示 3535–4042 厘米的大斯托克斯位移-1如预期的那样,在不同极性的有机溶剂中的一般荧光量子产率为 0.05, 249–0.11, 866。它还表现出对汞的高度选择性和敏感反应2+(Ф 汞+HL/Ф HL= 2.28) 超过其他金属离子 (Na+, ķ+, 钙2+, 镁2+, 铝3+, 铅2+, 铁3+, 你2+, 锌2+, 铜2+, 银+, 钴2+, 铬3+, 锰2+和镉2+) 在溶液中 (DMF/Tris-HCl 缓冲液, 1:1,v/v, pH = 7.2)。汞2+-在 526 nm 处诱导的荧光增强与 Hg 浓度成正比2+在 0.5–4.0 µ 范围内米检测限为