Near-Infrared Excitation of the peri-Xanthenoxanthene Radical Cation Drives Energy-Demanding Hole Transfer Reactions

2018 ◽  
Vol 122 (41) ◽  
pp. 23364-23370 ◽  
Author(s):  
Joseph A. Christensen ◽  
Jinyuan Zhang ◽  
Jiawang Zhou ◽  
Jordan N. Nelson ◽  
Michael R. Wasielewski
Keyword(s):  
Radical Cation ◽  
Near Infrared ◽  
Transfer Reactions ◽  
Hole Transfer ◽  
Infrared Excitation

Quasi-Continuous Wave Near-Infrared Excitation of Upconversion Nanoparticles for Optogenetic Manipulation ofC. elegans

Small ◽  
2016 ◽  
Vol 12 (13) ◽  
pp. 1732-1743 ◽  
Author(s):  
Akshaya Bansal ◽  
Haichun Liu ◽  
Muthu Kumara Gnanasammandhan Jayakumar ◽  
Stefan Andersson-Engels ◽  
Yong Zhang
Keyword(s):  
Near Infrared ◽  
Continuous Wave ◽  
Upconversion Nanoparticles ◽  
Infrared Excitation

Near-infrared absorption of a benzothiophene-appended triphenylamine radical cation: A novel molecular design of NIR-II dye

2021 ◽  
pp. 109929
Author(s):  
Masafumi Yano ◽  
Yoshinori Inada ◽  
Yuki Hayashi ◽  
Misaki Nakai ◽  
Koichi Mitsudo ◽  
...  
Keyword(s):  
Radical Cation ◽  
Infrared Absorption ◽  
Near Infrared ◽  
Molecular Design

scholarly journals Demonstrated Wavelength Portability of Raman Reference Data for Explosives and Chemical Detection

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Timothy J. Johnson ◽  
Yin-Fong Su ◽  
Kristin H. Jarman ◽  
Brenda M. Kunkel ◽  
Jerome C. Birnbaum ◽  
...  
Keyword(s):  
Near Infrared ◽  
Reference Data ◽  
Current Sensor ◽  
Data Sets ◽  
Reference Library ◽  
Wavelength Calibration ◽  
Intensity Response ◽  
Excitation Laser ◽  
Key Issues ◽  
Infrared Excitation

As Raman spectroscopy continues to evolve, questions arise as to the portability of Raman data: dispersive versus Fourier transform, wavelength calibration, intensity calibration, and in particular the frequency of the excitation laser. While concerns about fluorescence arise in the visible or ultraviolet, most modern (portable) systems use near-infrared excitation lasers, and many of these are relatively close in wavelength. We have investigated the possibility of porting reference data sets from one NIR wavelength system to another: We have constructed a reference library consisting of 145 spectra, including 20 explosives, as well as sundry other compounds and materials using a 1064 nm spectrometer. These data were used as a reference library to evaluate the same 145 compounds whose experimental spectra were recorded using a second 785 nm spectrometer. In 128 cases of 145 (or 88.3% including 20/20 for the explosives), the compounds were correctly identified with a mean “hit score” of 954 of 1000. Adding in criteria for when to declare a correct match versus when to declare uncertainty, the approach was able to correctly categorize 134 out of 145 spectra, giving a 92.4% accuracy. For the few that were incorrectly identified, either the matched spectra were spectroscopically similar to the target or the 785 nm signal was degraded due to fluorescence. The results indicate that imported data recorded at a different NIR wavelength can be successfully used as reference libraries, but key issues must be addressed: the reference data must be of equal or higher resolution than the resolution of the current sensor, the systems require rigorous wavelength calibration, and wavelength-dependent intensity response should be accounted for in the different systems.

scholarly journals Near infrared light induced plasmonic hot hole transfer at a nano-heterointerface

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Zichao Lian ◽  
Masanori Sakamoto ◽  
Hironori Matsunaga ◽  
Junie Jhon M. Vequizo ◽  
Akira Yamakata ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Hole Transfer

A new near-infrared excitation PDT photosensitizer in vivo

2021 ◽  
Author(s):  
Yueshu Feng ◽  
Binyu Li ◽  
Yulin Huang
Keyword(s):  
Near Infrared ◽  
Infrared Excitation
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