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- Title
A Smart Sensing Method for Object Identification Using Circularly Polarized Luminescence from Coordination‐Driven Self‐Assembly.
- Authors
Imai, Yuki; Nakano, Yuka; Kawai, Tsuyoshi; Yuasa, Junpei
- Abstract
Abstract: 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.
- Subjects
LUMINESCENCE; PYRENE derivatives; CIRCULAR dichroism; SIGNAL detection; METAL ions
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 29, p9111
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201803833