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Huang H, Wang X, Zhou G, Qian C, Zhou Z, Wang Z, Yang Y. A novel ratiometric fluorescent sensor from modified coumarin-grafted cellulose for precise pH detection in strongly alkaline conditions. Int J Biol Macromol 2024; 262:130066. [PMID: 38340911 DOI: 10.1016/j.ijbiomac.2024.130066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 01/28/2024] [Accepted: 02/07/2024] [Indexed: 02/12/2024]
Abstract
Accurate and convenient monitoring of pH under extreme alkaline conditions is still a challenge. In this work, 4-(3-(7-hydroxy-2-oxo-2H-chromen-3-yl)-3-oxoprop-1-en-1-yl)benzamide (HCB), a coumarin derivative, was grafted onto dialdehyde cellulose (DAC) to obtain a sensor DAC-HCB, which exhibited a ratiometric fluorescent response to the pH of alkaline solutions, resulting in a significant fluorescent color change from yellow to blue (FI459 nm/FI577 nm) at pH 7.5-14. The structure of DAC-HCB was characterized through FT-IR, XRD, XPS, SEM. The pKa of sensor DAC-HCB was 13.16, and the fluorescent intensity ratio FI459 nm/FI577 nm possessed an excellent linear characteristic with pH in the scope of 9.0-13.0. Meanwhile, sensor DAC-HCB showed good selectivity, anti-interference, and fast response time to basic pH, which is an effective fluorescent sensor for examination of pH in alkali circumstance. The recognition mechanism of DAC-HCB to OH- was elucidated with HRMS and density-functional theory (DFT) computational analyses. Sensor DAC-HCB was successfully used for precise detection of environmental water samples pH. This work furnished a new protocol for test strips as a convenient and highly efficient pH detection tool for the high pH environment, and it has great potential for application in environmental monitoring.
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Affiliation(s)
- Huan Huang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Xiaoyuan Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Guocheng Zhou
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Cheng Qian
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Zihang Zhou
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Zhonglong Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Yiqin Yang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
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Duan W, Wang C, Jiang Y, Sui A, Li Z, Wang L, Lei Z, Aime S, Yu J, Li C. A Ratiometric SERS Probe for Imaging the Macrophage Phenotypes in Live Mice with Epilepsy and Brain Tumor. Adv Healthc Mater 2023; 12:e2301000. [PMID: 37580893 DOI: 10.1002/adhm.202301000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/17/2023] [Indexed: 08/16/2023]
Abstract
Macrophage performs multiple functions such as pathogen phagocytosis, antigen presentation, and tissue remodeling by polarizing toward a spectrum of phenotypes. Dynamic imaging of macrophage phenotypes is critical for evaluating disease progression and the therapeutic response of drug candidates. However, current technologies cannot identify macrophage phenotypes in vivo. Herein, a surface-enhanced Raman scattering nanoprobe, AH1, which enables the accurate determination of physiological pH with high sensitivity and tissue penetration depth through ratiometric Raman signals is developed. Due to the phenotype-dependent metabolic reprogramming, AH1 can effectively identify macrophage subpopulations by measuring the acidity levels in phagosomes. After intravenous administration, AH1 not only visualizes the spatial distribution of macrophage phenotypes in brain tumors and epileptic regions of mouse models, but also reveals the repolarization of macrophages in brain lesions after drug intervention. This work provides a new tool for dynamically monitoring the disease-associated immune microenvironment and evaluating the efficacy of immune-therapeutics in vivo.
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Affiliation(s)
- Wenjia Duan
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, School of Pharmacy, Fudan University, Shanghai, 201203, China
- Department of Forensic Toxicology, Academy of Forensic Science, Ministry of Justice, Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Science Platform, Shanghai, 200063, China
| | - Cong Wang
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, School of Pharmacy, Fudan University, Shanghai, 201203, China
- State Key Laboratory of Medical Neurobiology, Zhongshan Hospital, Shanghai Fifth People's Hospital, Fudan University, Shanghai, 201203, China
| | - Yiqing Jiang
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - An Sui
- School of Information Science and Technology, Fudan University, Shanghai, 200433, China
| | - Zhi Li
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Lu Wang
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Zuhai Lei
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Silvio Aime
- Department of Molecular Biotechnologies, Health Sciences Molecular Imaging Center, University of Torino, Torino, 10126, Italy
| | - Jinhua Yu
- School of Information Science and Technology, Fudan University, Shanghai, 200433, China
| | - Cong Li
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, School of Pharmacy, Fudan University, Shanghai, 201203, China
- State Key Laboratory of Medical Neurobiology, Zhongshan Hospital, Shanghai Fifth People's Hospital, Fudan University, Shanghai, 201203, China
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Tong YK, Ye A. Liquid-Liquid Phase Separation in Single Suspended Aerosol Microdroplets. Anal Chem 2023; 95:12200-12208. [PMID: 37556845 DOI: 10.1021/acs.analchem.2c05605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Liquid-liquid phase separation (LLPS) is ubiquitous in ambient aerosols. This specific morphology exerts substantial impacts on the physicochemical properties and atmospheric processes of aerosols, particularly on the gas-particle mass transfer, the interfacial heterogeneous reaction, and the surface albedo. Although there are many studies on the LLPS of aerosols, a clear picture of LLPS in individual aerosols is scarce due to the experimental difficulties of trapping a single particle and mimicking the suspended state of real aerosols. Here, we investigate the phase separation in individual contactless microdroplets by a self-constructed laser tweezer/Raman spectroscopy system. The dynamic transformation of the morphology of optically trapped droplets over the course of humidity cycles is detected by the time-resolved cavity-enhanced Raman spectra. The impacts of pH and inorganic components on LLPS in aerosols are discussed. The results show that the increasing acidity can enhance the miscibility between the hydrophilic and hydrophobic phases and decrease the separation relative humidity of aerosols. Moreover, the inorganic components also have various impacts on the aerosol phase state, whose influence depends on their different salting-out capabilities. It brings possible implications on the morphology of actual atmospheric particles, particularly for those dominated by internal mixtures of inorganic and organic components.
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Affiliation(s)
- Yu-Kai Tong
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
| | - Anpei Ye
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
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