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William E. Meador ; Eric Y. Lin ; Irene Lim , et al. Nat. Chem.,2024,16,970-978. DOI: 10.1038/s41557-024-01464-6 PubMed ID: 38528102
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Abstract: In vivo fluorescence imaging in the shortwave infrared (SWIR, 1,000-1,700 nm) and extended SWIR (ESWIR, 1,700-2,700 nm) regions has tremendous potential for diagnostic imaging. Although image contrast has been shown to improve as longer wavelengths are accessed, the design and synthesis of organic fluorophores that emit in these regions is challenging. Here we synthesize a series of silicon-RosIndolizine (SiRos) fluorophores that exhibit peak emission wavelengths from 1,300-1,700 nm and emission onsets of 1,800-2,200 nm. We characterize the fluorophores photophysically (both steady-state and time-resolved), electrochemically and computationally using time-dependent density functional theory. Using two of the fluorophores (SiRos1300 and SiRos1550), we formulate nanoemulsions and use them for general systemic circulatory SWIR fluorescence imaging of the cardiovascular system in mice. These studies resulted in high-resolution SWIR images with well-defined vasculature visible throughout the entire circulatory system. This SiRos scaffold establishes design principles for generating long-wavelength emitting SWIR and ESWIR fluorophores.
Purchased from AmBeed: 1089687-03-5 ; 84459-33-6 ; 31928-44-6
CAS No. : | 31928-44-6 | MDL No. : | MFCD00672944 |
Formula : | C6H3BrClI | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | CXHXFDQEFKFYQJ-UHFFFAOYSA-N |
M.W : | 317.35 | Pubchem ID : | 13741326 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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