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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Metal ion-assisted ring-opening of a quinazoline-based chemosensor: detection of copper(II) in aqueous media
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Metal ion-assisted ring-opening of a quinazoline-based chemosensor: detection of copper(II) in aqueous media

机译:金属离子辅助的基于喹唑啉的化学传感器的开环:检测水性介质中的铜(II)

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摘要

A quinazoline-based fluorescence chemosensor, 6-phenol-2-yl-(5,6-dihydrobenzimidazo[1,2-c])quinazoline (HL), for highly selective recognition of Cu(II) in aqueous media was synthesized. The detection limit was of the order of 10(-6) M. The crystal structures of the Cu(II) and Cd(II) complexes showed that HL changed to a Schiff base when it reacts with metal salts and that the metal ions coordinate with two nitrogen atoms and one hydroxyl oxygen atom from the Schiff base. The theoretical calculations at B3LYP-SCRF/6-31G(d) confirmed that it is the Cu(II) ion that assisted the ring-opening of the quinazoline derivative, forming a Cu(II) Schiff base complex during the detection. LMCT leads to the disappearance of fluorescence. A cell imaging study indicated that HL could be used to detect the intracellular Cu2+ ion.
机译:合成了一种基于喹唑啉的荧光化学传感器6-酚-2-基-(5,6-二氢苯并咪唑并[1,2-c])喹唑啉(HL),用于高度选择性地识别水性介质中的Cu(II)。检测极限约为10(-6)M。Cu(II)和Cd(II)配合物的晶体结构表明,当HL与金属盐反应时,HL变为席夫碱,并且金属离子配位带有两个席夫碱的氮原子和一个羟基氧原子在B3LYP-SCRF / 6-31G(d)处进行的理论计算证实,正是Cu(II)离子协助了喹唑啉衍生物的开环,在检测过程中形成了Cu(II)Schiff碱配合物。 LMCT导致荧光消失。细胞成像研究表明,HL可用于检测细胞内Cu2 +离子。

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