1,8-Naphthyridine-Derived Ni<sup>2+</sup>/Cu<sup>2+</sup>-Selective Fluorescent Chemosensor with Different Charge Transfer Processses
作者:Zhanxian Li、Wanying Zhao、Xiaoya Li、Yanyan Zhu、Chunmei Liu、Lina Wang、Mingming Yu、Liuhe Wei、Mingsheng Tang、Hongyan Zhang
DOI:10.1021/ic3018453
日期:2012.11.19
1,8-naphthyridine with high sensitivity and selectivity toward Ni2+/Cu2+ over other cations both in aqueous solution over a wide pH range (4–10) and in cellular environments was developed. Counteranions such as acetate, sulfate, nitrate, and perchlorate have no influence on the detection of such metal ions. Ethylenediamine showed high selectivity toward the in situ-prepared Cu2+ complex over the Ni2+
开发了一种基于1,8-萘啶的高荧光化学传感器,该传感器在宽pH范围(4-10)的水溶液中和细胞环境中对Ni 2+ / Cu 2+的灵敏度均高于其他阳离子,并且具有选择性。诸如乙酸根,硫酸根,硝酸根和高氯酸根之类的抗衡离子对这种金属离子的检测没有影响。乙二胺对原位制备的Cu 2+络合物具有比Ni 2+络合物更高的选择性,可用于区分Ni 2+和Cu 2+。Ni 2+诱导的荧光开-关机制被揭示是由分子内的电荷从金属转移到配体介导的,而由Cu介导的2+涉及分子内电荷从配体到金属的转移,这已被皮秒时间分辨荧光光谱法和随时间变化的密度泛函理论计算所证实。