keyword
https://read.qxmd.com/read/38530563/exploring-the-gamma-ray-enhanced-nir-luminescence-and-cytotoxic-potential-of-lanthanide-naphthalene-dicarboxylate-based-metal-organic-frameworks
#1
JOURNAL ARTICLE
Podilapu Atchutha Rao, Harihara Padhy, Krishanu Bandyopadhyay, Adapaka Venkateswara Rao, Ravikumar Ganta, Samatha Bevara, Bheeshma Pratap Singh, Bhavani Kundrapu, Satyen Saha, RamaRao Malla, Saratchandra Babu Mukkamala
In this investigation, we explore the integration of lanthanides into Metal-Organic Frameworks (MOFs) to enable Near-Infrared (NIR) emission. Specifically, we focus on Lanthanide-Naphthalene Dicarboxylate based MOFs (Ln-MOFs), incorporating elements such as Praseodymium (Pr), Samarium (Sm), Dysprosium (Dy), and Erbium (Er). The synthesis of Ln-MOFs is achieved via the hydrothermal method. The structure, morphology, thermal stability, and luminescence properties of synthesized Ln-MOFs have been evaluated through different characterization techniques...
March 26, 2024: Journal of Fluorescence
https://read.qxmd.com/read/38529816/bright-near-infrared-emission-from-the-au-39-sr-29-nanocluster
#2
JOURNAL ARTICLE
Zhongyu Liu, Lianshun Luo, Jie Kong, Ellen Kahng, Meng Zhou, Rongchao Jin
The synthesis of atomically precise gold nanoclusters with high photoluminescence quantum yield (PLQY) in the near-infrared (NIR) region and understanding their photoluminescence mechanism are crucial for both fundamental science and practical applications. Herein, we report a highly luminescent, molecularly pure Au39 (PET)29 (PET = 2-phenylethanethiolate) nanocluster with PLQY of 19% in the NIR range (915 nm). Steady state and time-resolved PL analyses, as well as temperature-dependent PL measurements reveal the emission nature of Au39 (PET)29 , which consists of prompt fluorescence (weak), thermally activated delayed fluorescence (TADF), and phosphorescence (predominant)...
March 26, 2024: Nanoscale
https://read.qxmd.com/read/38525914/nir-ii-absorption-fluorescence-of-d-a-%C3%AF-conjugated-polymers-composed-of-strong-electron-acceptors-based-on-boron-fused-azobenzene-complexes
#3
JOURNAL ARTICLE
Masashi Nakamura, Ippei Kanetani, Masayuki Gon, Kazuo Tanaka
Luminescence in the second near-infrared (NIR-II, 1,000-1,700 nm) window is beneficial especially for deep tissue imaging and optical sensors because of intrinsic high permeability through various media. Strong electron-acceptors with low-lying lowest unoccupied molecular orbital (LUMO) energy levels are a crucial unit for donor-acceptor (D-A) π-conjugated polymers (CPs) with the NIR-II emission property, however, limited kinds of molecular skeletons are still available. Herein, D-A CPs involving fluorinated boron-fused azobenzene complexes (BAz) with enhanced electron-accepting properties are reported...
March 25, 2024: Angewandte Chemie
https://read.qxmd.com/read/38525159/nir-ii-emissive-donor-acceptor-donor-fluorophores-for-dual-fluorescence-bioimaging-and-photothermal-therapy-applications
#4
JOURNAL ARTICLE
Nicholas E Sparks, Cameron Smith, Terrence Stahl, Dhanush L Amarasekara, Christine Hamadani, Ethan Lambert, Sheng Wei Tang, Anuja Kulkarni, Blaine M Derbigny, Gaya S Dasanayake, George Taylor, Maryam Ghazala, Nathan I Hammer, Alexander Y Sokolov, Nicholas C Fitzkee, Eden E L Tanner, Davita L Watkins
Fluorescence bioimaging with near-infrared II (NIR-II) emissive organic fluorophores has proven to be a viable noninvasive diagnostic technique. However, there is still the need for the development of fluorophores that possess increased stability as well as functionalities that impart stimuli responsiveness. Through strategic design, we can synthesize fluorophores that possess not only NIR-II optical profiles but also pH-sensitivity and the ability to generate heat upon irradiation. In this work, we employ a donor-acceptor-donor (D-A-D) design to synthesize a series of NIR-II fluorophores...
March 21, 2024: Journal of Materials Chemistry. C, Materials for Optical and Electronic Devices
https://read.qxmd.com/read/38522491/surface-modification-of-hollow-gold-nanoparticles-conducted-by-incorporating-cancer-cell-membrane-and-as1411-aptamer-aiming-to-achieve-a-dual-targeted-therapy-for-colorectal-cancer
#5
JOURNAL ARTICLE
Sepideh Hassibian, Seyed Mohammad Taghdisi, Zahra Jamshidi, Ali Samie, Morteza Alinezhad Nameghi, Mersedeh Shayan, Naser Farrokhi, Mona Alibolandi, Mohammad Ramezani, Seyed Mohsen Dehnavi, Khalil Abnous
Due to its inherent membrane structure, a nanostructure enveloped by an active cell membrane possesses distinctive characteristics such as prolonged presence in the bloodstream, precise identification capabilities, and evasion of immune responses. This research involved the production of biomimetic nanoparticles, specifically hollow gold nanoparticles (HGNPs) loaded with methotrexate (MTX), which were further coated with cancer cell membrane. These nanoparticles were then adorned with AS1411 aptamer to serve as a targeting agent (Apt-CCM-HG@MTX)...
March 22, 2024: International Journal of Pharmaceutics
https://read.qxmd.com/read/38522224/intraoperative-visualization-of-cranial-nerve-schwannomas-using-second-window-indocyanine-green-a-case-series
#6
Najib Muhammad, Sonia Ajmera, John Y K Lee
BACKGROUND: Second Window Indocyanine Green (SWIG) is a novel intraoperative imaging technique that uses near-infrared (NIR) light for intra-operative tumor visualization using the well-known fluorophore indocyanine green (ICG). Because schwannomas often incorporate the nerve into the encapsulated tumor and impinge on surrounding neural structures, SWIG is a promising technique to improve tumor resection while sparing the nerve. OBJECTIVE: To demonstrate the use of SWIG in resection of cranial nerve schwannomas...
March 11, 2024: Clinical Neurology and Neurosurgery
https://read.qxmd.com/read/38516153/development-of-dual-channel-fluorescent-mesoporous-sio-2-nanosphere-coated-yttrium-aluminum-garnet-composites-for-sensitive-detection-of-latent-fingerprints
#7
JOURNAL ARTICLE
Ping Yang, Tingfei Shi, Shuangquan Zhu, Kuiliang Li, Hong Zhao
In this study, we investigated the detection of latent fingerprints (LFPs) using green light- and near-infrared (NIR) light-induced up/down-conversion dual-channel composites. Upconverted yttrium aluminium garnet (YAG) was prepared using a citric acid-assisted sol-gel method. After loading rhodamine 6G (RhD-6) into mesoporous silica nanospheres (MSNs), the MSNs-RhD-6 composites were coated with the as-synthesised YAG via electrostatic adsorption using the layer-by-layer method, demonstrating reversible switching between yellow and green light waves under 525 nm green light or 980 nm laser excitation...
March 20, 2024: RSC Advances
https://read.qxmd.com/read/38514970/acidity-triggered-sticky-spotlight-cck2r-targeted-tme-sensitive-nir-fluorescent-probes-for-tumor-imaging-in-vivo
#8
JOURNAL ARTICLE
Ruiqi Sun, Yuxin Wang, Wenhui Shi, Hongfu Zhang, Jianhua Liu, Weina He
Cancer which causes high mortality globally threatens public health seriously. There is an urgent need to develop tumor-specific near-infrared (NIR) imaging agents to achieve precise diagnosis and guide effective treatment. In recent years, imaging probes that respond to acidic environments such as endosomes, lysosomes, or acidic tumor microenvironments (TMEs) are being developed. However, because of their nonspecific internalization by both normal and tumor cells, resulting in a poor signal-to-noise ratio in diagnosis, these pH-sensitive probes fail to be applied to in vivo tumor imaging...
March 21, 2024: Bioconjugate Chemistry
https://read.qxmd.com/read/38509728/near-infrared-imaging-of-phytochrome-derived-autofluorescence-in-plant-nuclei
#9
JOURNAL ARTICLE
Akira Yoshinari, Reika Isoda, Noriyoshi Yagi, Yoshikatsu Sato, Jelmer J Lindeboom, David W Ehrhardt, Wolf B Frommer, Masayoshi Nakamura
Capturing images of the nuclear dynamics within live cells is an essential technique for comprehending the intricate biological processes inherent to plant cell nuclei. While various methods exist for imaging nuclei, including combining fluorescent proteins and dyes with microscopy, there is a dearth of commercially available dyes for live-cell imaging. In Arabidopsis thaliana, we discovered that nuclei emit autofluorescence in the near-infrared (NIR) range of the spectrum and devised a non-invasive technique for the visualization of live cell nuclei using this inherent NIR autofluorescence...
March 20, 2024: Plant Journal
https://read.qxmd.com/read/38508967/augmenting-laparoscopic-surgery-with-fluorescence-imaging
#10
REVIEW
Chris Thomson
Minimally invasive endoscopic surgery is growing in veterinary medicine, in large part, due to the advantages associated with reduced pain, potential for decreased complications, and increased visualization of structures through magnification and illumination. With advancing technologies, we can now improve upon natural "white light" endoscopy with fluorescence-guided imaging. Near-infrared (NIR) cameras allow for real-time, high-definition visualization of vessels, anatomic structures, and perfusion. New uses of NIR technologies during laparoscopy are continuing to grow for vascular, lymphatic, and oncologic-related techniques...
March 19, 2024: Veterinary Clinics of North America. Small Animal Practice
https://read.qxmd.com/read/38507745/boosting-luminescence-efficiency-of-near-infrared-ii-aggregation-induced-emission-luminogens-via-a-mash-up-strategy-of-%C3%AF-extension-and-deuteration-for-dual-model-image-guided-surgery
#11
JOURNAL ARTICLE
Fulong Ma, Qian Jia, Ziwei Deng, Bingzhe Wang, Siwei Zhang, Jinhui Jiang, Guichuan Xing, Zhongliang Wang, Zijie Qiu, Zheng Zhao, Ben Zhong Tang
The simultaneous pursuit of accelerative radiative and restricted nonradiative decay is of tremendous significance to construct high-luminescence-efficiency fluorophores in the second near-infrared wavelength window (NIR-II), which is seriously hindered by the energy gap laws. Herein, a mash-up strategy of π-extension and deuteration is proposed to efficaciously ameliorate the knotty problem. By extending the π-conjugation of the aromatic fragment and introducing an isotope effect to the aggregation-induced emission luminogen (AIEgen), an improved oscillator strength ( f ), coupled with suppressed deformation and high-frequency oscillation in the excited state, are successively implemented...
March 20, 2024: ACS Nano
https://read.qxmd.com/read/38506395/structural-photoluminescence-and-optical-characteristics-of-a-sm-3-doped-lead-borate-strontium-tungsten-glass-system-evaluation-of-judd-ofelt-intensity-parameters-and-radiative-properties
#12
JOURNAL ARTICLE
Islam E Kotb, Aly Okasha, Nehad A Zidan, Samir Y Marzouk
In this study, the melt quenching approach is used to synthesize a lead borate-strontium-based glass system doped with samarium ions. Modifications in the glass network structure arising from the addition of various concentrations of Sm3+ ions were investigated via Fourier transform infrared (FTIR) spectroscopy. FTIR analysis revealed B-O-B bridges, BO3 , and BO4 units are present. UV-vis-NIR spectroscopic measurement was performed to study the optical absorption spectra. Optical constants such as optical bandgap energies, refractive indices, and other related parameters were evaluated...
March 2024: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/38504315/clinicopathological-factors-associated-with-sentinel-lymph-node-detection-in-non-small-cell-lung-cancer
#13
JOURNAL ARTICLE
Christophe Wollbrett, Joseph Seitlinger, Florent Stasiak, Juliette Piccoli, Arthur Streit, Joelle Siat, Guillaume Gauchotte, Stéphane Renaud
BACKGROUND: Mapping of the pulmonary lymphatic system by near-infrared (NIR) fluorescence imaging might not always identify the first lymph node relay. The aim of this study was to determine the clinicopathologic factors allowing the identification of sentinel lymph nodes (SLNs) by NIR fluorescence imaging in thoracic surgery for non-small-cell lung cancer (NSCLC). METHODS: We conducted a retrospective review of 92 patients treated for suspected or confirmed cN0 lung cancer with curative intent who underwent an intraoperative injection of indocyanine green (ICG) either by direct peritumoral injection or by endobronchial injection using electromagnetic navigational bronchoscopy (ENB)...
March 19, 2024: Journal of Cardiothoracic Surgery
https://read.qxmd.com/read/38503156/rhodiola-crenulata-alleviates-hypobaric-hypoxia-induced-brain-injury-by-maintaining-bbb-integrity-and-balancing-energy-metabolism-dysfunction
#14
JOURNAL ARTICLE
Ya Hou, Fuhan Fan, Na Xie, Yi Zhang, Xiaobo Wang, Xianli Meng
BACKGROUND/PURPOSE: Rhodiola crenulata (Hook. f. et Thoms.) H. Ohba (R. crenulate), a famous and characteristic Tibetan medicine, has been demonstrated to exert an outstanding brain protection role in the treatment of high-altitude hypoxia disease. However, the metabolic effects of R. crenulate on high-altitude hypoxic brain injury (HHBI) are still incompletely understood. Herein, the anti-hypoxic effect and associated mechanisms of R. crenulate were explored through both in vivo and in vitro experiments...
March 11, 2024: Phytomedicine
https://read.qxmd.com/read/38503119/synergistic-synthesis-of-gold-nanoflowers-as-upconversion-near-infrared-nanoprobe-energy-acceptor-and-recognition-unit-for-improved-hydrogen-sulfide-sensing
#15
JOURNAL ARTICLE
Hongyu Chen, Peipei Tian, Jiayi Guo, Manman Sun, Wenping Zhu, Zhendong Li, Zengchen Liu
A highly sensitive and selective upconversion near-infrared (NIR) fluorescence and colorimetric dual readout hydrogen sulfide (H2 S) nanoprobe was constructed based on the excellent NIR fluorescence emission performance of upconversion nanomaterials (UCNPs), the specific recognition effect of synergistically synthesized gold nanoflowers (trypsin-stabled AuNFs (Try-AuNFs)) and the effective NIR fluorescence quenching capability. In this assay, the sensing strategy included three processes. First of all, the synthesized UCNPs can emit 803 nm NIR fluorescence when they were excited by 980 nm excitation light...
March 15, 2024: Talanta
https://read.qxmd.com/read/38502871/intraoperative-resection-guidance-and-rapid-pathological-diagnosis-of-osteosarcoma-using-b7h3-targeted-probe-under-nir-ii-fluorescence-imaging
#16
JOURNAL ARTICLE
Fanwei Zeng, Changjian Li, Han Wang, Yueqi Wang, Tingting Ren, Fangzhou He, Jie Jiang, Jiuhui Xu, Boyang Wang, Yifan Wu, Yiyang Yu, Zhenhua Hu, Jie Tian, Shidong Wang, Xiaodong Tang
Complete removal of all tumor tissue with a wide surgical margin is essential for the treatment of osteosarcoma (OS). However, it's difficult, sometimes impossible, to achieve due to the invisible small satellite lesions and blurry tumor boundaries. Besides, intraoperative frozen-section analysis of resection margins of OS is often restricted by the hard tissues around OS, which makes it impossible to know whether a negative margin is achieved. Any unresected small tumor residuals will lead to local recurrence and worse prognosis...
March 19, 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://read.qxmd.com/read/38502215/near-infrared-ii-theranostic-agents-for-the-diagnosis-and-treatment-of-alzheimer-s-disease
#17
REVIEW
Can Zhou, Fantian Zeng, Haijun Yang, Zeying Liang, Guanyu Xu, Xiao Li, Xingdang Liu, Jian Yang
BACKGROUND: Near-infrared II theranostic agents have gained great momentum in the research field of AD owing to the appealing advantages. Recently, an array of activatable NIR-II fluorescence probes has been developed to specifically monitor pathological targets of AD. Furthermore, various NIR-II-mediated nanomaterials with desirable photothermal and photodynamic properties have demonstrated favorable outcomes in the management of AD. METHODS: We summerized amounts of references and focused on small-molecule probes, nanomaterials, photothermal therapy, and photodynamic therapy based on NIR-II fluorescent imaging for the diagnosis and treatment in AD...
March 19, 2024: European Journal of Nuclear Medicine and Molecular Imaging
https://read.qxmd.com/read/38501303/red-nir-i-fluorescence-carbon-dots-based-on-rhein-with-active-oxygen-scavenging-and-colitis-targeting-for-uc-therapeutics
#18
JOURNAL ARTICLE
Jiashan Xia, Jiayu Wang, Fengyuan Liu, Zhiqiong Chen, Changmei Chen, Xiangshu Cheng, Yu Chao, Yue Wang, Tao Deng
Ulcerative colitis (UC) is a lifelong inflammatory disease characterized by uncontrolled inflammatory response and intestinal epithelial barrier damage that continuously promote disease progression. Rhein, as an active monomer in traditional Chinese medicine, has dual biological effects of controlling inflammatory responses and promoting intestinal mucosal repair. However, their clinical application is limited by their hydrophobicity and poor bioavailability. L-arginine, as a complement to NO, has synergistic and attenuating effects...
March 19, 2024: Advanced Healthcare Materials
https://read.qxmd.com/read/38498766/x-ray-activated-nanoprodrug-for-visualization-of-cortical-microvascular-alterations-and-nir-ii-image-guided-chemo-radiotherapy-of-glioblastoma
#19
JOURNAL ARTICLE
Lichao Su, Kang Zhu, Xiaoguang Ge, Ying Wu, Jieping Zhang, Guoyu Wang, Daojia Liu, Ling Chen, Qingqing Li, Junqiang Chen, Jibin Song
The permeability of the highly selective blood-brain barrier (BBB) to anticancer drugs and the difficulties in defining deep tumor boundaries often reduce the effectiveness of glioma treatment. Thus, exploring the combination of multiple treatment modalities under the guidance of second-generation near-infrared (NIR-II) window fluorescence (FL) imaging is considered a strategic approach in glioma theranostics. Herein, a hybrid X-ray-activated nanoprodrug was developed to precisely visualize the structural features of glioma microvasculature and delineate the boundary of glioma for synergistic chemo-radiotherapy...
March 18, 2024: Nano Letters
https://read.qxmd.com/read/38497051/cancer-diagnosis-and-treatment-platform-based-on-manganese-based-nanomaterials
#20
REVIEW
Jia Fei, Yanyan Liu, Ya Zeng, Mingqi Yang, Shanshan Chen, Xiaobing Duan, Ligong Lu, Muhe Chen
Cancer is a leading cause of death worldwide, and the development of new diagnostic and treatment methods is crucial. Manganese-based nanomaterials (MnNMs) have emerged as a focal point in the field of cancer diagnosis and treatment due to their multifunctional properties. These nanomaterials have been extensively explored as contrast agents for various imaging technologies such as magnetic resonance imaging (MRI), photoacoustic imaging (PAI), and near-infrared fluorescence imaging (NIR-FL). The use of these nanomaterials has significantly enhanced the contrast for precise tumor detection and localization...
2024: Frontiers in Bioengineering and Biotechnology
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