scholarly journals Cover Feature: A Three‐Color Fluorescent Supramolecular Nanoassembly of Phototherapeutics Activable by Two‐Photon Excitation with Near‐Infrared Light (Chem. Eur. J. 29/2019)

2019 ◽  
Vol 25 (29) ◽  
pp. 7041-7041
Author(s):  
Aurore Fraix ◽  
Vladimir Kirejev ◽  
Milo Malanga ◽  
Éva Fenyvesi ◽  
Szabolcs Béni ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Two Photon ◽  
Photon Excitation ◽  
Two Photon Excitation

A Three‐Color Fluorescent Supramolecular Nanoassembly of Phototherapeutics Activable by Two‐Photon Excitation with Near‐Infrared Light

2019 ◽  
Vol 25 (29) ◽  
pp. 7091-7095 ◽  
Author(s):  
Aurore Fraix ◽  
Vladimir Kirejev ◽  
Milo Malanga ◽  
Éva Fenyvesi ◽  
Szabolcs Béni ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Two Photon ◽  
Photon Excitation ◽  
Two Photon Excitation

scholarly journals Two-Photon–NIR-II Antimicrobial Graphene-Nanoagent for Ultraviolet–NIR Imaging and Photoinactivation

2021 ◽  
Author(s):  
WEN-SHUO KUO ◽  
Chia-Yuan Chang ◽  
Ping-Ching Wu ◽  
Jiu-Yao Wang
Keyword(s):  
Photodynamic Therapy ◽  
Quantum Yield ◽  
Chemical Modification ◽  
Near Infrared ◽  
Photon Absorption ◽  
Excitation Wavelength ◽  
Strong Electron ◽  
Two Photon ◽  
Photon Excitation ◽  
Two Photon Excitation

Abstract BackgroundNitrogen doping and amino-group functionalization, which result in strong electron donation, can be achieved through chemical modification. Large π-conjugated systems of graphene quantum dot (GQD)-based materials acting as electron donors can be chemically manipulated with low two-photon excitation energy in a short photoexcitation time for improving the charge transfer efficiency of sorted nitrogen-doped amino acid–functionalized GQDs (sorted amino-N-GQDs). ResultsIn this study, a self-developed femtosecond Ti-sapphire laser optical system (222.7 nJ pixel−1 with 100-170 scans, approximately 0.65-1.11 s of total effective exposure times; excitation wavelength: 960 nm in the near-infrared II region) was used for chemical modification. The sorted amino-N-GQDs exhibited enhanced two-photon absorption, post-two-photon excitation stability, two-photon excitation cross-section, and two-photon luminescence through the radiative pathway. The lifetime and quantum yield of the sorted amino-N-GQDs decreased and increased, respectively. Furthermore, the sorted amino-N-GQDs exhibited excitation-wavelength-independent photoluminescence in the near-infrared region and generated reactive oxygen species after two-photon excitation. An increase in the size of the sorted amino-N-GQDs boosted photochemical and electrochemical efficacy and resulted in high photoluminescence quantum yield and highly efficient two-photon photodynamic therapy. ConclusionThe sorted dots can be used in two-photon contrast probes for tracking and localizing analytes during two-photon imaging in a biological environment and for conducting two-photon photodynamic therapy for eliminating infectious microbes.

scholarly journals Dynamics of Oxygen-Independent Photocleavage of Blebbistatin as a One-Photon Blue or Two-Photon Near-Infrared Light-Gated Hydroxyl Radical Photocage

2018 ◽  
Vol 140 (46) ◽  
pp. 15957-15968 ◽  
Author(s):  
Ming-De Li ◽  
Nai-Kei Wong ◽  
Jia Xiao ◽  
Ruixue Zhu ◽  
Liangliang Wu ◽  
...  
Keyword(s):  
Hydroxyl Radical ◽  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Two Photon

scholarly journals Powering rotary molecular motors with low-intensity near-infrared light

2020 ◽  
Vol 6 (44) ◽  
pp. eabb6165
Author(s):  
Lukas Pfeifer ◽  
Nong V. Hoang ◽  
Maximilian Scherübl ◽  
Maxim S. Pshenichnikov ◽  
Ben L. Feringa
Keyword(s):  
Smart Materials ◽  
Molecular Motors ◽  
Near Infrared ◽  
In Vivo Studies ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Two Photon ◽  
Low Intensity

Light-controlled artificial molecular machines hold tremendous potential to revolutionize molecular sciences as autonomous motion allows the design of smart materials and systems whose properties can respond, adapt, and be modified on command. One long-standing challenge toward future applicability has been the need to develop methods using low-energy, low-intensity, near-infrared light to power these nanomachines. Here, we describe a rotary molecular motor sensitized by a two-photon absorber, which efficiently operates under near-infrared light at intensities and wavelengths compatible with in vivo studies. Time-resolved spectroscopy was used to gain insight into the mechanism of energy transfer to the motor following initial two-photon excitation. Our results offer prospects toward in vitro and in vivo applications of artificial molecular motors.

Cellular deoxyribonucleic-acid probes of two-photon-excited fluorescent quinolinium-substituted carbazole

The Analyst ◽  
2019 ◽  
Vol 144 (4) ◽  
pp. 1245-1252
Author(s):  
Yanru Feng ◽  
Shuheng Chi ◽  
Yanli Zhao ◽  
Yunjie Zhang ◽  
Yiqun Wu
Keyword(s):  
Deoxyribonucleic Acid ◽  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Carbazole Derivatives ◽  
Two Photon

Three new quinolinium-carbazole derivatives as deoxyribonucleic-acid probes irradiated with near-infrared-light have been designed and synthesized.

Covalent Organic Framework for Improving Near‐Infrared Light Induced Fluorescence Imaging through Two‐Photon Induction

2019 ◽  
Vol 132 (25) ◽  
pp. 10173-10180 ◽  
Author(s):  
Jin‐Yue Zeng ◽  
Xiao‐Shuang Wang ◽  
Bo‐Ru Xie ◽  
Min‐Jie Li ◽  
Xian‐Zheng Zhang
Keyword(s):  
Fluorescence Imaging ◽  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Covalent Organic Framework ◽  
Two Photon ◽  
Organic Framework
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