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A Smart Sensing Method for Object Identification Using Circularly Polarized Luminescence from Coordination‐Driven Self‐Assembly
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-06-19 , DOI: 10.1002/anie.201803833
Yuki Imai 1 , Yuka Nakano 2 , Tsuyoshi Kawai 2 , Junpei Yuasa 1
Affiliation  

The potential use of circularly polarized luminescence for object identification in a sensor application is demonstrated. New luminescence probes using pyrene derivatives as sensor luminophores were developed. (R,R)‐Im2Py and (S,S)‐Im2Py contain two chiral imidazole moieties at 1,6‐positions through ethynyl spacers (angle between spacers ca. 180°). The probe molecules spontaneously self‐assemble into chiral stacks (P or M helicity) upon coordination to metal ions with tetrahedral coordination (Zn2+). The chiral probes display neither circular dichroism (CD) nor circularly polarized luminescence (CPL) without metal ions. However, (R,R)‐Im2Py and (S,S)‐Im2Py exhibit intense chiroptical activity (CD and CPL) upon self‐assembly with Zn2+ ions. (R,R)‐Im2Py and (S,S)‐Im2Py with chemical stimuli‐responsibility allow sensing using the CPL signal as detection output, enabling us to discriminate between a signal from the target analyte and that from non‐target species.

中文翻译:

一种基于协调驱动自组装的圆偏振发光的物体识别智能传感方法

演示了圆偏振发光在传感器应用中用于物体识别的潜在用途。开发了使用using衍生物作为传感器发光体的新型发光探针。(R,R)-Im 2 Py和(S,S)-Im 2 Py通过乙炔基间隔基(间隔基之间的角度约为180°)在1,6-位包含两个手性咪唑部分。与四面体配位的金属离子(Zn 2+)配位后,探针分子自发地自组装为手性堆栈(P或M螺旋)。没有金属离子的手性探针既不显示圆二色性(CD),也不显示圆极化发光(CPL)。但是,(R,R)‐Im 2 Py和(S,S)‐Im 2与Zn 2+离子自组装后,Py表现出强烈的手性(CD和CPL)。具有化学刺激性的(R,R)‐Im 2 Py和(S,S)‐Im 2 Py允许使用CPL信号作为检测输出进行感测,从而使我们能够区分目标分析物的信号和非分析物的信号目标物种。
更新日期:2018-06-19
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