摘要
以1,3-二氨基硫脲、苯甲醛与噻唑-5-甲醛为原料,合成了一种新型不对称双席夫碱结构荧光探针N’-亚苄基-2-(噻唑-5-基亚甲基)肼基-1-硫代碳酰肼(L),并通过NMR、IR、ESI-MS和元素分析对其结构进行表征。在缓冲溶液(pH=7.0)中,探针L可以高选择性地荧光识别Zn2+,检测限为3.5×10-7mol/L,pH适用范围为5~10。当Zn2+与探针L配位时,生成1∶2型配合物(L-Zn2+),在365 nm紫外灯照射下,由无色变成亮绿色强荧光,具有潜在的应用价值。
N’-benzylidene-2-(thiazole-5-methylidene)hydrazine-1-thiocarbonyl hydrazide(L),a novel asymmetric bis-Schiff base fluorescent probe,is synthesized by using 1,3-thiocarbohydrazide,benzaldehyde and thiazole-5-formaldehyde as starting materials,and its structure is characterized by NMR,IR,ESI-MS and elemental analysis.In an ethanol/tris(pH 7.0)buffer solution,the probe L can high-selectively recognize Zn2+with fluorescence responding,the experimental results demonstrate that the detection limit is 3.5×10-7 mol·L-1,and the proper pH range is 5-10.When Zn2+is coordinated with probe L,a 1∶2 type complex(L-Zn2+)is formed and fluorescence color of the system changes from non-fluoresce to strong bright-green fluorescence under 365 nm UV lamp irradiation.
作者
石治川
赵志刚
SHI Zhi-chuan;ZHAO Zhi-gang(College of Chemistry&Environment Protection Engineering,Southwest Minzu University,Chengdu 610041,China)
出处
《现代化工》
CAS
CSCD
北大核心
2019年第9期227-231,共5页
Modern Chemical Industry
基金
西南民族大学中央高校基本科研业务费专项资金资助青年教师基金项目(2015NZYQN23)
关键词
硫脲
荧光探针
席夫碱
锌离子
识别
thiocarbazone
fluorescent probe
Schiff base
Zn2+
recognition
