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Ravi S, Karthikeyan S, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Propeller shaped triarylamine acid: An ultra-sensitive fluorescence probe for distinguishing propanol isomers and water sensing in organic solvents. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 319:124557. [PMID: 38830332 DOI: 10.1016/j.saa.2024.124557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/05/2024]
Abstract
The photophysical properties of conformationally flexible (TPA-C) and partially rigidified (Cz-C) triarylamine acids were explored in solid as well as solution state and correlated with the structure. TPA-C and Cz-C exhibited moderate solid-state fluorescence (Φf = 6.2 % (TPA-C) and 5.6 % (Cz-C)) and self-reversible mechanofluorochromism. TPA-C produced fluorescent polymorphs (TPA-C-1 and TPA-C-2) with tunable fluorescence. TPA-C-1 showed unusual carboxylic acid intermolecular interactions whereas TPA-C-2 and Cz-C showed usual carboxylic acid dimer. TPA-C exhibited strong solvent polarity dependent tunable fluorescence (Φf = 0.01 to 0.11 compared to quinine sulphate standard) but Cz-C was non-emissive in the solution state. The dual emissive TPA-C showed highly sensitive fluorescence changes in organic solvents (CH3CN, THF, DMF, EtOH) when trace amount of water was added. In CH3CN, TPA-C showed weak fluorescence at 474 nm and addition of water (1 %) exhibited significant blue shift (λmax = 416 nm). The fluorescence intensity was gradually decreased with blue shifting in DMF, THF and EtOH with water addition. Importantly, TPA-C showed drastically different fluorescence in n-propanol (n-PA) and iso-propanol (IPA). TPA-C in n-PA showed fluorescence at 408 nm that was clearly red shifted to 438 nm with 0.1 % addition of IPA. The limit of detection (LOD) of water in CH3CN, DMF, THF and EtOH by TPA-C revealed 0.02, 0.7, 0.08 and 0.77 %, respectively. The LOD of IPA sensing in n-PA is 0.05 % and indicated the very efficient sensing and distinguishing propanol isomers. Thus, simple triphenylamine acid showed excellent water sensing and propanol isomers discrimination that could be attributed to the twisted intramolecular charge transfer (TICT) formation.
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Affiliation(s)
- Sasikala Ravi
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - Subramanian Karthikeyan
- Department of Chemistry, Khadir Mohideen College (Affiliated to Bharathidasan University), Adirampattinam, Tamil Nadu, India
| | - Mehboobali Pannipara
- Research Center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia; Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia
| | - Abdullah G Al-Sehemi
- Research Center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia; Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127beongil, Nam-gu, Pohang, Gyeongbuk, Korea.
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Bandaru S, Arora D, Ganesh KM, Umrao S, Thomas S, Bhaskar S, Chakrabortty S. Recent Advances in Research from Nanoparticle to Nano-Assembly: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1387. [PMID: 39269049 PMCID: PMC11397018 DOI: 10.3390/nano14171387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2024] [Revised: 08/17/2024] [Accepted: 08/20/2024] [Indexed: 09/15/2024]
Abstract
The careful arrangement of nanomaterials (NMs) holds promise for revolutionizing various fields, from electronics and biosensing to medicine and optics. This review delves into the intricacies of nano-assembly (NA) techniques, focusing on oriented-assembly methodologies and stimuli-dependent approaches. The introduction provides a comprehensive overview of the significance and potential applications of NA, setting the stage for review. The oriented-assembly section elucidates methodologies for the precise alignment and organization of NMs, crucial for achieving desired functionalities. The subsequent section delves into stimuli-dependent techniques, categorizing them into chemical and physical stimuli-based approaches. Chemical stimuli-based self-assembly methods, including solvent, acid-base, biomolecule, metal ion, and gas-induced assembly, are discussed in detail by presenting examples. Additionally, physical stimuli such as light, magnetic fields, electric fields, and temperature are examined for their role in driving self-assembly processes. Looking ahead, the review outlines futuristic scopes and perspectives in NA, highlighting emerging trends and potential breakthroughs. Finally, concluding remarks summarize key findings and underscore the significance of NA in shaping future technologies. This comprehensive review serves as a valuable resource for researchers and practitioners, offering insights into the diverse methodologies and potential applications of NA in interdisciplinary research fields.
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Affiliation(s)
- Shamili Bandaru
- Department of Chemistry, SRM University AP─Andhra Pradesh, Mangalagiri 522240, Andhra Pradesh, India
| | - Deepshika Arora
- Engineering Product Development, Singapore University of Technology and Design (SUTD), 8 Somapah Road, Singapore 487372, Singapore
| | - Kalathur Mohan Ganesh
- Star Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Sri Sathya Sai, Puttaparthi 515134, Andhra Pradesh, India
| | - Saurabh Umrao
- Nick Holonyak Jr. Micro and Nanotechnology Laboratory (HMNTL), University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Sabu Thomas
- International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam 686 560, Kerala, India
| | - Seemesh Bhaskar
- Nick Holonyak Jr. Micro and Nanotechnology Laboratory (HMNTL), University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Sabyasachi Chakrabortty
- Department of Chemistry, SRM University AP─Andhra Pradesh, Mangalagiri 522240, Andhra Pradesh, India
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Yu F, Qin L, Zhang H, Qin L, Fan H. A novel fluorescence-electrochemiluminescence dual-mode sensing platform for high-precision BRAF gene detection. Analyst 2024; 149:2114-2121. [PMID: 38426487 DOI: 10.1039/d3an02237d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
In this study, we innovatively synthesized bipyridine ruthenium cluster nanosheets (RuMOFNCs), a novel metal-organic framework material that exhibits both fluorescence and electrochemiluminescence. Gold nanoparticles (AuNPs) were anchored onto RuMOFNCs via bipyridine chelation, enhancing optical signals and creating sites for attaching biologically functional probes. We employed tetraferrocene-modified DNA probes, linked via gold-sulfur (Au-S) bonds, to construct a dual-mode fluorescence-electrochemiluminescence biosensor. This sensor, exploiting exonuclease III (Exo III)-mediated cyclic amplification, inhibits the electron transfer from RuMOFNC to tetraferrocene, resulting in amplified fluorescence and electrochemiluminescence signals. The sensor demonstrates exceptional sensitivity for detecting the BRAF gene, with fluorescence and electrochemiluminescence detection limits of 10.3 aM (range: 0.1 fM to 1 nM) and 3.1 aM (range: 1 aM to 10 pM), respectively. These capabilities are attributed to RuMOFNCs' luminescence properties, tetraferrocene's quenching effect, and the specificity of base pairing. This study's findings hold substantial promise for biomedical research and clinical diagnostics, particularly in precision medicine and early disease detection.
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Affiliation(s)
- Fengyao Yu
- Department of Pharmacy, JiangXi University of Chinese Medicine, Nanchang, JiangXi 330004, China
| | - Longyue Qin
- School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, YunNan 650031, China
| | - Hua Zhang
- Department of Pharmacy, JiangXi University of Chinese Medicine, Nanchang, JiangXi 330004, China
| | - Longshua Qin
- Department of Pharmacy, JiangXi University of Chinese Medicine, Nanchang, JiangXi 330004, China
| | - Hao Fan
- Department of Pharmacy, JiangXi University of Chinese Medicine, Nanchang, JiangXi 330004, China
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Qin L, Yu Q, Huang Y, Zhang L, Yan X, Wu W, Liao F, Zhang J, Cui H, Zhang J, Fan H. A novel fluorescent sensor with an overtone peak reference for highly sensitive detection of mercury (II) ions and hydrogen sulfide: Mechanisms and applications in environmental monitoring and bioanalysis. Anal Chim Acta 2024; 1287:342086. [PMID: 38182341 DOI: 10.1016/j.aca.2023.342086] [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: 10/23/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 01/07/2024]
Abstract
The present study introduces a novel fluorescent sensor with an overtone peak reference designed for the detection of mercury (Ⅱ) ions (Hg2+) and hydrogen sulfide (H2S). The study proposes two novel response mechanisms that hinges on the synergistic effect of cation exchange dissociation (CED) and photo-induced electron transfer (PET). This sensor exhibits a remarkable detection limit of 2.9 nM for Hg2+. Additionally, the sensor reacts with H2S to generate nickel sulfide (NiS) semiconductor nanoparticles, which amplify the fluorescence signal and enable a detection limit of 3.1 nM for H2S. The detection limit for H2S is further improved to 29.1 pM through the surface functionalization of the nanomaterial with pyridine groups (increasing reactivity) and chelation of gold nanoparticles (AuNPs), which enhances the sensor's specificity. This improvement is primarily due to the surface plasmon resonance (SPR) of AuNPs and their affinity for H2S. The single-emission strategy can yield skewed results due to environmental changes, whereas the overtone peak reference strategy enhances result accuracy and reliability by detecting environmental interference through reference emission peaks. In another observation, the low-toxicity dihydropyrene-bipyridine nanorods (TPP-BPY) has been successfully utilized for both endogenous and exogenous H2S detection in vivo using a mouse model. The successful development of TPP-BPY is expected to provide an effective tool for studying the role of H2S in biomedical systems.
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Affiliation(s)
- Longshua Qin
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Qiangqiang Yu
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Yong Huang
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Leichang Zhang
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Xinying Yan
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Wenqi Wu
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Fusheng Liao
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Jie Zhang
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Hanfeng Cui
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China.
| | - Jing Zhang
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China.
| | - Hao Fan
- Affiliated Hospital and College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China.
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Ganesh KM, Bhaskar S, Cheerala VSK, Battampara P, Reddy R, Neelakantan SC, Reddy N, Ramamurthy SS. Review of Gold Nanoparticles in Surface Plasmon-Coupled Emission Technology: Effect of Shape, Hollow Nanostructures, Nano-Assembly, Metal-Dielectric and Heterometallic Nanohybrids. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:111. [PMID: 38202566 PMCID: PMC10780701 DOI: 10.3390/nano14010111] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/23/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024]
Abstract
Point-of-care (POC) diagnostic platforms are globally employed in modern smart technologies to detect events or changes in the analyte concentration and provide qualitative and quantitative information in biosensing. Surface plasmon-coupled emission (SPCE) technology has emerged as an effective POC diagnostic tool for developing robust biosensing frameworks. The simplicity, robustness and relevance of the technology has attracted researchers in physical, chemical and biological milieu on account of its unique attributes such as high specificity, sensitivity, low background noise, highly polarized, sharply directional, excellent spectral resolution capabilities. In the past decade, numerous nano-fabrication methods have been developed for augmenting the performance of the conventional SPCE technology. Among them the utility of plasmonic gold nanoparticles (AuNPs) has enabled the demonstration of plethora of reliable biosensing platforms. Here, we review the nano-engineering and biosensing applications of AuNPs based on the shape, hollow morphology, metal-dielectric, nano-assembly and heterometallic nanohybrids under optical as well as biosensing competencies. The current review emphasizes the recent past and evaluates the latest advancements in the field to comprehend the futuristic scope and perspectives of exploiting Au nano-antennas for plasmonic hotspot generation in SPCE technology.
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Affiliation(s)
- Kalathur Mohan Ganesh
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam Campus, Sri Sathya Sai District, Puttaparthi 515134, India;
| | - Seemesh Bhaskar
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Nick Holonyak Jr. Micro and Nanotechnology Laboratory (HMNTL), University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Vijay Sai Krishna Cheerala
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Brindavan Campus, Kadugodi, Bengaluru 560067, India; (V.S.K.C.); (S.C.N.)
| | - Prajwal Battampara
- Center for Incubation Innovation Research and Consultancy, Jyothy Institute of Technology, Thataguni Post, Bengaluru 560109, India; (P.B.); (R.R.); (N.R.)
| | - Roopa Reddy
- Center for Incubation Innovation Research and Consultancy, Jyothy Institute of Technology, Thataguni Post, Bengaluru 560109, India; (P.B.); (R.R.); (N.R.)
| | - Sundaresan Chittor Neelakantan
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Brindavan Campus, Kadugodi, Bengaluru 560067, India; (V.S.K.C.); (S.C.N.)
| | - Narendra Reddy
- Center for Incubation Innovation Research and Consultancy, Jyothy Institute of Technology, Thataguni Post, Bengaluru 560109, India; (P.B.); (R.R.); (N.R.)
| | - Sai Sathish Ramamurthy
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam Campus, Sri Sathya Sai District, Puttaparthi 515134, India;
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Moosavi R, Zibaseresht R. Efficient cyanide sensing using plasmonic Ag/Fe 3O 4 nanoparticles. RSC Adv 2023; 13:33120-33128. [PMID: 37954410 PMCID: PMC10633889 DOI: 10.1039/d3ra06654a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 10/30/2023] [Indexed: 11/14/2023] Open
Abstract
In the line of our previous studies, we have reported a developed sensitive and selective probe for cyanide detection based on Ag/Fe3O4 nanoparticles (NPs) with an extremely low limit of detection at the level of ng per milliliter. Herein, we report the improvement of the easy-to-make magnetic silver nanoparticle-based sensor system for cyanide determination in an extended calibration range with higher selectivity and precision. As far as our knowledge is concerned, the detectable linear range from 1.0 nM to 160 μM (0.026 ng mL-1 to 4.16 μg mL-1) of the improved simple highly precise technique represents the widest assay that has been reported so far. The method is based on strong enhancement of scattered light of the plasmonic nanoparticles and simultaneously cyanide fluorescence quenching. Although the fluorescence of cyanide is highly selective and precise, its intensity is poor. On the other hand, the strongly enhanced Rayleigh signal has a low repeatability. We proposed a method to remove the interference and obtained an effective factor that is directly proportional to cyanide concentration utilizing both above signals simultaneously. In this work, Ag/Fe3O4 NPs have been synthesized easily using a green preparation method and the NPs were consequently characterized using powder XRD, UV-Vis absorption spectroscopy, transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). A combination of absorption, Rayleigh and fluorescence characteristics were used for detection of cyanide in real samples and an overview of recently reported sensors for cyanide was also provided.
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Affiliation(s)
- Razieh Moosavi
- Nano Electronic Center of Excellence, Nano Bio Electronic Devices Lab, School of Electrical and Computer Engineering, University of Tehran Tehran Iran
- Biomaterials and Medicinal Chemistry Research Centre, Aja University of Medical Sciences Tehran Iran
| | - Ramin Zibaseresht
- Biomaterials and Medicinal Chemistry Research Centre, Aja University of Medical Sciences Tehran Iran
- Department of Chemistry and Physics, Faculty of Sciences, Maritime University of Imam Khomeini Nowshahr Iran
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Xie M, Xu Q, Xie L, Li Y, Han B. Establishment and optimization of the three-band fluorometric indices for oil species identification: Implications on the optimal excitation wavelengths and the detection band combinations. Anal Chim Acta 2023; 1280:341871. [PMID: 37858556 DOI: 10.1016/j.aca.2023.341871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 09/18/2023] [Accepted: 10/02/2023] [Indexed: 10/21/2023]
Abstract
BACKGROUND The oil pollutants have become a major threat to the ocean environment with the rapid development of social economy and offshore production activities. The detection and identification of petroleum pollutants is the foundation and pre-requisite for controlling offshore oil pollution. Spectroscopic analysis using the ultraviolet-induced fluorescence of oil pollutants is a potential way for oil species identification. Nevertheless, the current fluorescence spectroscopic analysis methods, such as excitation-emission matrix, has high requirements on the detection equipment. There is a great need for rapid oil species identification method when it comes to practical applications. (93) RESULTS: This study established the three-band fluorometric index (TBFI) method and examined its capability on the oil species identification. The fluorescence of five different types of oil samples under various excitation wavelengths were excited using a tuneable xenon lamp, and measured using a high-resolution spectrometer. The optimal excitation wavelengths and the corresponding detection band combinations were explored through the iterations of an optimal band combination algorithm through different excitation wavelengths. According to the results, three out of the four TBFIs tested in this study are suitable for oil species identification. They share the same sets of the excitation wavelengths under 365 nm, 375 nm, and 435 nm. The detection band combinations corresponding to each TBFI under each feasible excitation wavelength were also determined in this study. (125) SIGNIFICANCE: The three-band fluorometric index method proposed in this study provides a feasible way for the rapid oil species identification using fluorescence spectroscopic analysis. The optimal excitation and detection wavelengths determined in this study also provide the theoretical basis for the designs of fluorescence sensors for rapid oil spill detection and identification. (51).
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Affiliation(s)
- Ming Xie
- Navigation College, Dalian Maritime University, Dalian, China
| | - Qintuan Xu
- Navigation College, Dalian Maritime University, Dalian, China
| | - Lei Xie
- Navigation College, Dalian Maritime University, Dalian, China
| | - Ying Li
- Navigation College, Dalian Maritime University, Dalian, China.
| | - Bing Han
- National Engineering Research Centre for Ship Control System, Shanghai Ship and Shipping Research Institute, Shanghai, China
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8
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Wu Q, Jiao Y, Luo M, Wang J, Li J, Ma Y, Liu C. Detection of Various Traditional Chinese Medicinal Metabolites as Angiotensin-Converting Enzyme Inhibitors: Molecular Docking, Activity Testing, and Surface Plasmon Resonance Approaches. Molecules 2023; 28:7131. [PMID: 37894610 PMCID: PMC10609061 DOI: 10.3390/molecules28207131] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 10/09/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
Angiotensin-converting enzyme 1 (ACE1) is a peptide involved in fluid and blood pressure management. It regulates blood pressure by converting angiotensin I to angiotensin II, which has vasoconstrictive effects. Previous studies have shown that certain compounds of natural origin can inhibit the activity of angiotensin-converting enzymes and exert blood pressure-regulating effects. Surface Plasmon Resonance (SPR) biosensor technology is the industry standard method for observing biomolecule interactions. In our study, we used molecular simulation methods to investigate the docking energies of various herbal metabolites with ACE1 proteins, tested the real-time binding affinities between various herbal metabolites and sACE1 by SPR, and analyzed the relationship between real-time binding affinity and docking energy. In addition, to further explore the connection between inhibitor activity and real-time binding affinity, several herbal metabolites' in vitro inhibitory activities were tested using an ACE1 activity test kit. The molecular docking simulation technique's results and the real-time affinity tested by the SPR technique were found to be negatively correlated, and the virtual docking technique still has some drawbacks as a tool for forecasting proteins' affinities to the metabolites of Chinese herbal metabolites. There may be a positive correlation between the enzyme inhibitory activity and the real-time affinity detected by the SPR technique, and the results from the SPR technique may provide convincing evidence to prove the interaction between herbal metabolites and ACE1 target proteins.
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Affiliation(s)
| | | | | | | | | | | | - Changzhen Liu
- Experimental Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
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Chen N, Wang Y, Deng Z. DNA-Condensed Plasmonic Supraballs Transparent to Molecules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:14053-14062. [PMID: 37725679 DOI: 10.1021/acs.langmuir.3c01860] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
DNA nanotechnology offers an unrivaled programmability of plasmonic nanoassemblies based on encodable Watson-Crick basepairing. However, it is very challenging to build rigidified three-dimensional supracolloidal assemblies with strong electromagnetic coupling and a self-confined exterior shape. We herein report an alternative strategy based on a DNA condensation reaction to make such structures. Using DNA-grafted gold nanoparticles as building blocks and metal ions with suitable phosphate affinities as abiological DNA-bonding agents, a seedless growth of spheroidal supraparticles is realized via metal-ion-induced DNA condensation. Some governing rules are disclosed in this process, including kinetic and thermodynamic effects stemming from electrostatic and coordinative forces with different interaction ranges. The supraballs are tailorable by adjusting the volumetric ratio between DNA grafts and gold cores and by overgrowing extra gold layers toward tunable plasmon coupling. Various appealing and highly desirable properties are achieved for the resulting metaballs, including (i) chemical reversibility and fixation ability, (ii) stability against denaturant, salt, and molecular adsorbates, (iii) enriched and continuously tunable plasmonic hotspots, (iv) permeability to small guest molecules and antifoulingness against protein contaminates, and (v) Raman-enhancing and photocatalytic activities. Innovative applications are thus foreseeable for this emerging class of meta-assemblies in contrast to what is achieved by DNA-basepaired ones.
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Affiliation(s)
- Nuo Chen
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yueliang Wang
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zhaoxiang Deng
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
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Chen J, Ling Y, Yuan X, He Y, Li S, Wang G, Zhang Z, Wang G. Highly Sensitive Detection of Formaldehyde by Laser-Induced Graphene-Coated Silver Nanoparticles Electrochemical Sensing Electrodes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12762-12773. [PMID: 37642387 DOI: 10.1021/acs.langmuir.3c01472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Formaldehyde (HCHO) poses a grave threat to human health because of its toxicity, but its accurate, sensitive, and rapid detection in aqueous solutions remains a major challenge. This study proposes a novel electrochemical sensor composed of a graphene-based electrode that is prepared via laser induction technology. The precursor material, polyimide, is modified via the metal ion exchange method, and the detective electrode is coated with graphene and silver nanoparticles. And the special structure of graphene-coated Ag was demonstrated using scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), and X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS) results show that graphene provides more sites for Ag NRs to be exposed and increases the surface area of contact between the solution and the detection object. In addition, differential pulse voltammetry (DPV) analysis exhibits high linearity over the HCHO concentration range from 0.05 to 5 μg/mL, with a detection limit of 0.011 μg/mL (S/N = 3). The Ag NPs in the electrochemical reaction will adsorb the intermediate •CO and •OH, catalyze their combination, and finally convert to CO2 and H2O, respectively. A microdetection device, specially designed for use with commercial micro-workstations, is employed to fully demonstrate the practical application of the electrode, which paves a way for developing formaldehyde electrochemical sensors.
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Affiliation(s)
- Jianyue Chen
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Yunhan Ling
- Laboratory of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, China
| | - Xiaoming Yuan
- Laboratory of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, China
| | - Yuyang He
- Laboratory of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, China
| | - Shilin Li
- Laboratory of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, China
| | - Guan Wang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Zhengjun Zhang
- Laboratory of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, China
| | - Guixin Wang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
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