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Polymethine‐Based Semiconducting Polymer Dots with Narrow‐Band Emission and Absorption/Emission Maxima at NIR‐II for Bioimaging
Abstract
Deep‐penetration fluorescence imaging in the second near‐infrared (NIR‐II) window heralds a new era of clinical surgery, in which high‐resolution vascular/lymphatic anatomy and detailed cancerous tissues can be visualized in real time. Described here is a series of polymethine‐based semiconducting polymers with intrinsic emission maxima in the NIR‐IIa (1300–1400 nm) window and absorption maxima ranging from 1082 to 1290 nm. These polymers were prepared as semiconducting polymer dots (Pdots) in aqueous solutions with fluorescence quantum yields of 0.05–0.18 %, and they demonstrate promising applications in noninvasive through‐skull brain imaging in live mice with remarkable spatial resolution as well as signal‐to‐background contrast. This study offers a platform for future design of NIR‐IIa or even NIR‐IIb emitting Pdots.
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“Since the polymethine dyes were incorporated into pentiptycene selenyl benzothiadiazole (Pttc-SeBTa)-NIR1125/1270/1380 CPs by click reactions,195 this approach could be universal and could readily be utilized to integrate all kinds of fluorophores possessing reactive alkynes into CP chains.”
From The Pursuit of Shortwave Infrared-Emitting Nanoparticles with Bright Fluorescence through Molecular Design and Excited-State Engineering of Molecular Aggregates (2022) · cites this paper as [195]
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Metadata
- Authors
- Liu, M., Zhang, Z., Yang, Y., & Chan, Y.
- Affiliations
- National Yang Ming Chiao Tung University (TW)
- Southern University of Science and Technology (CN)
- Corresponding author
- Chan, Yang‐Hsiang
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2020-11-10
- Volume
- 60
- Issue
- 2
- Pages
- 983-989
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W3089389187
- Cited by
- 134
- References
- 65
- Citations by year
- 2026: 18 · 2025: 12 · 2024: 39 · 2023: 21 · 2022: 29 · 2021: 14 · 2020: 1
- FWCI
- 6.33
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Ministry of Science and Technology, Taiwan (105-2113-M-110-012-MY3)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
- Physical Sciences › Materials Science › Materials Chemistry › Quantum Dots Synthesis And Properties
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
- Keywords
- polymethine dyes, semiconducting polymer dots, NIR-II fluorescence imaging, bioimaging, vascular imaging, lymphatic imaging, fluorescence quantum yield
- MeSH terms
- Density Functional Theory, Animals, Brain, Contrast Media, Fluorescent Dyes, Indoles, Infrared Rays, Medulloblastoma, Mice, Inbred C57BL, Semiconductors, Spectroscopy, Near-Infrared, Quantum Dots, Mice, Optical Imaging
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