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Title: Flavylium Polymethine Fluorophores for Near- and Shortwave Infrared Imaging

Authors:
 [1];  [2]; ORCiD logo [2];  [2];  [1];  [1];  [2]; ORCiD logo [1]
  1. Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles CA 90095 USA
  2. Department of Chemistry, Massachusetts Institute of Technology, Cambridge MA 02139 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1390339
Grant/Contract Number:
SC0001088
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 56; Journal Issue: 42; Related Information: CHORUS Timestamp: 2017-10-20 16:14:14; Journal ID: ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Cosco, Emily D., Caram, Justin R., Bruns, Oliver T., Franke, Daniel, Day, Rachael A., Farr, Erik P., Bawendi, Moungi G., and Sletten, Ellen M. Flavylium Polymethine Fluorophores for Near- and Shortwave Infrared Imaging. Germany: N. p., 2017. Web. doi:10.1002/anie.201706974.
Cosco, Emily D., Caram, Justin R., Bruns, Oliver T., Franke, Daniel, Day, Rachael A., Farr, Erik P., Bawendi, Moungi G., & Sletten, Ellen M. Flavylium Polymethine Fluorophores for Near- and Shortwave Infrared Imaging. Germany. doi:10.1002/anie.201706974.
Cosco, Emily D., Caram, Justin R., Bruns, Oliver T., Franke, Daniel, Day, Rachael A., Farr, Erik P., Bawendi, Moungi G., and Sletten, Ellen M. 2017. "Flavylium Polymethine Fluorophores for Near- and Shortwave Infrared Imaging". Germany. doi:10.1002/anie.201706974.
@article{osti_1390339,
title = {Flavylium Polymethine Fluorophores for Near- and Shortwave Infrared Imaging},
author = {Cosco, Emily D. and Caram, Justin R. and Bruns, Oliver T. and Franke, Daniel and Day, Rachael A. and Farr, Erik P. and Bawendi, Moungi G. and Sletten, Ellen M.},
abstractNote = {},
doi = {10.1002/anie.201706974},
journal = {Angewandte Chemie (International Edition)},
number = 42,
volume = 56,
place = {Germany},
year = 2017,
month = 9
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on September 14, 2018
Publisher's Accepted Manuscript

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • It is shown that efficient lasing is possible in the near infrared if the active medium is a liquid solution of a polymethine dye with a strong intramolecular electronic asymmetry. In contrast to symmetric polymethine dyes, lasing is characterized by a large red shift so that it is possible to use visible radiation (second harmonic of a YAG:Nd/sup 3 +/ laser or argon and copper laser radiations) for the purpose of pumping. These dyes interact with a polar solvent forming in the ground state two groups of centers of specific and nonspecific solvation. A short-wavelength center of specific solvation transforms,more » in an excited state, to a nonspecific solvation center retaining the electronic excitation and it can therefore emit fluorescence or amplify radiation. The efficiency of this process is high so that the lasing efficiency in the range 750--850 nm (when pumping is provided at 532 nm) reaches 10--15%.« less
  • Methods of finding the optimal molecular structure of polymethine dyes which lase in the 707--1050 nm spectral range are described and results are presented. An investigation is made of the correlation between the structural, spectral, and lasing characteristics of these molecules. A list is given of dyes which best satisfy the requirements of laser device manufacture.
  • Shortwave Infrared imaging spectroscopy enables accurate remote mapping of cloud thermodynamic phase at high spatial resolution. We describe a measurement strategy to exploit signatures of liquid and ice absorption in cloud top apparent reflectance spectra from 1.4 to 1.8 μm. This signal is generally insensitive to confounding factors such as solar angles, view angles, and surface albedo. We first evaluate the approach in simulation and then apply it to airborne data acquired in the Calwater-2/ACAPEX campaign of Winter 2015. Here NASA’s “Classic” Airborne Visible Infrared Imaging Spectrometer (AVIRIS-C) remotely observed diverse cloud formations while the U.S. Department of Energy ARMmore » Aerial Facility G-1 aircraft measured cloud integral and microphysical properties in situ. Finally, the coincident measurements demonstrate good separation of the thermodynamic phases for relatively homogeneous clouds.« less
  • The development of polymethine (carbocyanines) dyes for extending continuous wave operation into the important near-infrared region is briefly described. (TFD)