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   https://doi.org/10.1117/12.2650672  

   Khanmohammadi, Sepideh ; Tran, Catherine ; Colin-Ulloa, Erika ; Kushnir, Kateryna ; Koski, Kristie J. ; Titova, Lyubov V. ( March 2023 , Ultrafast Phenomena and Nanophotonics XXVII, SPIE Photonics West)

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2. Controlling Antimicrobial Activity of Quinolones Using Visible/NIR Light-Activated BODIPY Photocages

   https://doi.org/10.3390/pharmaceutics14051070  

   Contreras-García, Elena ; Lozano, Carmen ; García-Iriepa, Cristina ; Marazzi, Marco ; Winter, Arthur H. ; Torres, Carmen ; Sampedro, Diego ( May 2022 , Pharmaceutics)

   Controlling the activity of a pharmaceutical agent using light offers improved selectivity, reduction of adverse effects, and decreased environmental build-up. These benefits are especially attractive for antibiotics. Herein, we report a series of photoreleasable quinolones, which can be activated using visible/NIR light (520–800 nm). We have used BODIPY photocages with strong absorption in the visible to protect two different quinolone-based compounds and deactivate their antimicrobial properties. This activity could be recovered upon green or red light irradiation. A comprehensive computational study provides new insight into the reaction mechanism, revealing the relevance of considering explicit solvent molecules. The triplet excited state is populated and the photodissociation is assisted by the solvent. The light-controlled activity of these compounds has been assessed on a quinolone-susceptible E. coli strain. Up to a 32-fold change in the antimicrobial activity was measured. 

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3. Visible to NIR‐II Photoluminescence of Atomically Precise Gold Nanoclusters

   https://doi.org/10.1002/adma.202309073  

   Liu, Zhongyu ; Luo, Lianshun ; Jin, Rongchao ( December 2023 , Advanced Materials)

   Atomically precise gold nanoclusters (NCs) have emerged as a new class of precision materials and attracted wide interest in recent years. One of the unique properties of such nanoclusters pertains to their photoluminescence (PL), for it can widely span visible to near‐infrared–I and –II wavelengths (NIR‐I/II), and even beyond 1700 nm by manipulating the size, structure, and composition. The current research efforts focus on the structure–PL correlation and the development of strategies for raising the PL quantum yields, which is nontrivial when moving from the visible to the near‐infrared wavelengths, especially in the NIR–II regions. This review summarizes the recent progress in the field, including i) the types of PL observed in gold NCs such as fluorescence, phosphorescence, and thermally activated delayed fluorescence, as well as dual emission; ii) some effective strategies that are devised to improve the PL quantum yield (QY) of gold NCs, such as heterometal doping, surface rigidification, and core phonon engineering, with double‐digit QYs for the NIR PL on the horizons; and iii) the applications of luminescent gold NCs in bioimaging, photosensitization, and optoelectronics. Finally, the remaining challenges and opportunities for future research are highlighted.

    

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4. Near-Infrared Emitting Heterobimetallic Zn-4f Schiff Base Complexes with Visible Excitation Wavelength: Near-Infrared Emitting Heterobimetallic Zn-4f Schiff Base Complexes with Visible Excitation Wavelength

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   Linden-Leibeszeit, J. Bee S. ; Eliseeva, Svetlana V. ; Chaudhary, Nikita ; Zeller, Matthias ; Petoud, Stéphane ; Trivedi, Evan R. ( December 2019 , European Journal of Inorganic Chemistry)
5. Archaeological Remote Sensing Using Multi-Temporal, Drone-Acquired Thermal and Near Infrared (NIR) Imagery: A Case Study at the Enfield Shaker Village, New Hampshire

   https://doi.org/10.3390/rs12040690  

   Hill, Austin Chad ; Laugier, Elise Jakoby ; Casana, Jesse ( February 2020 , Remote Sensing)

   While archaeologists have long understood that thermal and multi-spectral imagery can potentially reveal a wide range of ancient cultural landscape features, only recently have advances in drone and sensor technology enabled us to collect these data at sufficiently high spatial and temporal resolution for archaeological field settings. This paper presents results of a study at the Enfield Shaker Village, New Hampshire (USA), in which we collect a time-series of multi-spectral visible light, near-infrared (NIR), and thermal imagery in order to better understand the optimal contexts and environmental conditions for various sensors. We present new methods to remove noise from imagery and to combine multiple raster datasets in order to improve archaeological feature visibility. Analysis compares results of aerial imaging with ground-penetrating radar and magnetic gradiometry surveys, illustrating the complementary nature of these distinct remote sensing methods. Results demonstrate the value of high-resolution thermal and NIR imagery, as well as of multi-temporal image analysis, for the detection of archaeological features on and below the ground surface, offering an improved set of methods for the integration of these emerging technologies into archaeological field investigations. 

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