1
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H Krishne D, Sharma K, Reddy AJ, Koppal VV. Exploring the molecular binding mechanism of 6-fluoro, 4-hydroxy, 2- methyl quinoline with TiO 2 nanoparticles: A spectroscopic, thermodynamic, and insights into the solvatochromic effect. J Fluoresc 2024:10.1007/s10895-024-03829-z. [PMID: 38958908 DOI: 10.1007/s10895-024-03829-z] [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: 05/12/2024] [Accepted: 06/24/2024] [Indexed: 07/04/2024]
Abstract
This study investigates the interaction between titanium oxide nanoparticles (TiO2 NPs) and the heterocyclic fluorophore 6-fluoro,4-hydroxy,2-methylquinoline (6-FHMQ), aiming to understand fluorescence quenching mechanisms and thermodynamic characteristics. Spectroscopic techniques including spectrofluorometry (FL) and spectrophotometry (UV-Vis) were used, with a lifetime decay (τ) of 0.18 ns for 6-FHMQ measured using time correlated single photon counting (TCSPC). The interaction between 6-FHMQ and TiO2 NPs revealed a mix of static and dynamic fluorescence quenching mechanisms, with increasing quenching constants (Ksv) and a higher bimolecular quenching rate constant (Kq). The dynamic nature was highlighted by a temperature-dependent increase in binding sites from 1 to ~ 2. Spontaneous complexation was affirmed by negative change in free energy (ΔG), with negative change in enthalpy (ΔH) and a positive change in entropy (ΔS) values indicating favorable electrostatic and ionic interactions. The impact of varying TiO2 NP concentrations on 6-FHMQ absorption was analyzed using the Benesi-Hildbrand equation, with a quantum yield of 0.61 determined. By forster resonance energy transfer (FRET) theory, the proximity between 6-FHMQ and TiO2 NPs was found to be less than 70 Å. Ground and excited state dipole moments of 6-FHMQ in different solvents were calculated to demonstrate solvent sensing ability and charge transfer properties. Ultimately, this study serves as a testament to the power of scientific innovation in the realms of drug delivery and tissue engineering.
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Affiliation(s)
- Deepa H Krishne
- Department of Physics, M S Ramaiah Institute of Technology (Affiliated to VTU), Bangalore, 560054, Karnataka, India.
| | - Kalpana Sharma
- Department of Physics, M S Ramaiah Institute of Technology (Affiliated to VTU), Bangalore, 560054, Karnataka, India
| | - A Jagannatha Reddy
- Department of Physics, M S Ramaiah Institute of Technology (Affiliated to VTU), Bangalore, 560054, Karnataka, India
| | - V V Koppal
- Department of Physics, KLE Technological University, Hubli, 580031, Karnataka, India
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2
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Kurahashi H, Umezawa M, Okubo K, Soga K. Pixel Screening in Lifetime-Based Temperature Mapping Using β-NaYF 4:Nd 3+,Yb 3+ by Time-Gated Near-Infrared Fluorescence Imaging on Deep Tissue in Live Mice. ACS APPLIED BIO MATERIALS 2024; 7:3821-3827. [PMID: 38787698 PMCID: PMC11190971 DOI: 10.1021/acsabm.4c00201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Revised: 04/24/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
Near-infrared fluorescence (NIRF) thermometry is an emerging method for the noncontact measurement of in vivo deep temperatures. Fluorescence-lifetime-based methods are effective because they are unaffected by optical loss due to excitation or detection paths. Moreover, the physiological changes in body temperature in deep tissues and their pharmacological effects are yet to be fully explored. In this study, we investigated the potential application of the NIRF lifetime-based method for temperature measurement of in vivo deep tissues in the abdomen using rare-earth-based particle materials. β-NaYF4 particles codoped with Nd3+ and Yb3+ (excitation: 808 nm, emission: 980 nm) were used as NIRF thermometers, and their fluorescence decay curves were exponential. Slope linearity analysis (SLA), a screening method, was proposed to extract pixels with valid data. This method involves performing a linearity evaluation of the semilogarithmic plot of the decay curve collected at three delay times after cutting off the pulsed laser irradiation. After intragastric administration of the thermometer, the stomach temperature was monitored by using an NIRF time-gated imaging setup. Concurrently, a heater was attached to the lower abdomens of the mice under anesthesia. A decrease in the stomach temperature under anesthesia and its recovery via the heater indicated changes in the fluorescence lifetime of the thermometer placed inside the body. Thus, NaYF4:Nd3+/Yb3+ functions as a fluorescence thermometer that can measure in vivo temperature based on the temperature dependence of the fluorescence lifetime at 980 nm under 808 nm excitation. This study demonstrated the ability of a rare-earth-based NIRF thermometer to measure deep tissues in live mice, with the proposed SLA method for excluding the noisy deviations from the analysis for measuring temperature using the NIRF lifetime of a rare-earth-based thermometer.
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Affiliation(s)
- Hiroyuki Kurahashi
- Department of Materials
Science
and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Tokyo 125-8585, Katsushika, Japan
| | - Masakazu Umezawa
- Department of Materials
Science
and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Tokyo 125-8585, Katsushika, Japan
| | | | - Kohei Soga
- Department of Materials
Science
and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Tokyo 125-8585, Katsushika, Japan
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3
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Kapitany V, Fatima A, Zickus V, Whitelaw J, McGhee E, Insall R, Machesky L, Faccio D. Single-sample image-fusion upsampling of fluorescence lifetime images. SCIENCE ADVANCES 2024; 10:eadn0139. [PMID: 38781345 PMCID: PMC11114222 DOI: 10.1126/sciadv.adn0139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 04/17/2024] [Indexed: 05/25/2024]
Abstract
Fluorescence lifetime imaging microscopy (FLIM) provides detailed information about molecular interactions and biological processes. A major bottleneck for FLIM is image resolution at high acquisition speeds due to the engineering and signal-processing limitations of time-resolved imaging technology. Here, we present single-sample image-fusion upsampling, a data-fusion approach to computational FLIM super-resolution that combines measurements from a low-resolution time-resolved detector (that measures photon arrival time) and a high-resolution camera (that measures intensity only). To solve this otherwise ill-posed inverse retrieval problem, we introduce statistically informed priors that encode local and global correlations between the two "single-sample" measurements. This bypasses the risk of out-of-distribution hallucination as in traditional data-driven approaches and delivers enhanced images compared, for example, to standard bilinear interpolation. The general approach laid out by single-sample image-fusion upsampling can be applied to other image super-resolution problems where two different datasets are available.
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Affiliation(s)
- Valentin Kapitany
- School of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
| | - Areeba Fatima
- School of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
| | - Vytautas Zickus
- School of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
- Department of Laser Technologies, Center for Physical Sciences and Technology, LT-10257 Vilnius, Lithuania
| | | | - Ewan McGhee
- School of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
- Cancer Research UK, Beatson Institute, Glasgow, UK
| | | | | | - Daniele Faccio
- School of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
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4
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Lee J, Lee S, Lee K, Joung H, Choi SK, Kim M, Yang J, Paeng K. Segmental dynamics of polystyrene near polymer-polymer interfaces. J Chem Phys 2024; 160:124902. [PMID: 38516976 DOI: 10.1063/5.0189494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 03/04/2024] [Indexed: 03/23/2024] Open
Abstract
This study investigated the segmental dynamics of polymers near polymer-polymer interfaces by probing the rotation of polymer-tethered fluorescent molecules using imaging rotational fluorescence correlation microscopy. Multilayered films were utilized to provide spatial selectivity relative to different polymer-polymer interfaces. In the experimental setup, for the overlayer polymer, polystyrene (PS) was employed and a 15 nm-thick probe-containing layer was placed ≈25 nm apart from different underlayer polymers with glass transition temperatures (Tg) either lower or higher than that of PS. The underlayer of poly-n-butyl methacrylate had 72 K lower Tg than that of PS, whereas polymethyl methacrylate and polysulfone had 22 and 81 K higher Tg, respectively, than that of PS. Two key dynamic features of the glass transition, the non-Arrhenius temperature dependence and stretched relaxation, were examined to study the influence of soft and hard confinements on the segmental dynamics of the overlayer polymer near the polymer-polymer interfaces. Although complications exist in the probing location owing to the diffusion of the polymer-tethered probe during the annealing protocol to consolidate the multilayers, the results suggest that either the segmental dynamics of the polymer near the polymer-polymer interface do not change owing to the soft and hard confinements or the interfacial perturbation is very short ranged.
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Affiliation(s)
- Jeongin Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Soohyun Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Keonchang Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hyeyoung Joung
- Department of Chemistry, Yonsei University, Wonju, Gangwon 26493, Republic of Korea
| | - Seung Kun Choi
- Department of Chemistry, Inha University, Incheon 22212, Republic of Korea
| | - Myungwoong Kim
- Department of Chemistry, Inha University, Incheon 22212, Republic of Korea
| | - Jaesung Yang
- Department of Chemistry, Yonsei University, Wonju, Gangwon 26493, Republic of Korea
| | - Keewook Paeng
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
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5
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Zhang K, Carrod AJ, Del Giorgio E, Hughes J, Rurack K, Bennet F, Hodoroaba VD, Harrad S, Pikramenou Z. Luminescence Lifetime-Based Sensing Platform Based on Cyclometalated Iridium(III) Complexes for the Detection of Perfluorooctanoic Acid in Aqueous Samples. Anal Chem 2024; 96:1565-1575. [PMID: 38226978 PMCID: PMC10831797 DOI: 10.1021/acs.analchem.3c04289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/13/2023] [Accepted: 12/20/2023] [Indexed: 01/17/2024]
Abstract
Luminescence lifetimes are an attractive analytical method for detection due to its high sensitivity and stability. Iridium probes exhibit luminescence with long excited-state lifetimes, which are sensitive to the local environment. Perfluorooctanoic acid (PFOA) is listed as a chemical of high concern regarding its toxicity and is classified as a "forever chemical". In addition to strict limits on the presence of PFOA in drinking water, environmental contamination from industrial effluent or chemical spills requires rapid, simple, accurate, and cost-effective analysis in order to aid containment. Herein, we report the fabrication and function of a novel and facile luminescence sensor for PFOA based on iridium modified on gold surfaces. These surfaces were modified with lipophilic iridium complexes bearing alkyl chains, namely, IrC6 and IrC12, and Zonyl-FSA surfactant. Upon addition of PFOA, the modified surfaces IrC6-FSA@Au and IrC12-FSA @Au show the largest change in the red luminescence signal with changes in the luminescence lifetime that allow monitoring of PFOA concentrations in aqueous solutions. The platform was tested for the measurement of PFOA in aqueous samples spiked with known concentrations of PFOA and demonstrated the capacity to determine PFOA at concentrations >100 μg/L (240 nM).
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Affiliation(s)
- Kun Zhang
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
- School
of Geography, Earth & Environmental Sciences, University of Birmingham, Birmingham B15 2TT, U.K.
| | - Andrew J. Carrod
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
| | - Elena Del Giorgio
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
| | - Joseph Hughes
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
| | - Knut Rurack
- Chemical
and Optical Sensing Division, Federal Institute
for Materials Research and Testing (BAM), Richard-Willstätter-Str. 11, 12489 Berlin, Germany
| | - Francesca Bennet
- Surface
Analysis and Interfacial Chemistry Division, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 44-46, 12203 Berlin, Germany
| | - Vasile-Dan Hodoroaba
- Surface
Analysis and Interfacial Chemistry Division, Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 44-46, 12203 Berlin, Germany
| | - Stuart Harrad
- School
of Geography, Earth & Environmental Sciences, University of Birmingham, Birmingham B15 2TT, U.K.
| | - Zoe Pikramenou
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
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6
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Kumar V, Chunchagatta Lakshman PK, Prasad TK, Manjunath K, Bairy S, Vasu AS, Ganavi B, Jasti S, Kamariah N. Target-based drug discovery: Applications of fluorescence techniques in high throughput and fragment-based screening. Heliyon 2024; 10:e23864. [PMID: 38226204 PMCID: PMC10788520 DOI: 10.1016/j.heliyon.2023.e23864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 12/14/2023] [Accepted: 12/14/2023] [Indexed: 01/17/2024] Open
Abstract
Target-based discovery of first-in-class therapeutics demands an in-depth understanding of the molecular mechanisms underlying human diseases. Precise measurements of cellular and biochemical activities are critical to gain mechanistic knowledge of biomolecules and their altered function in disease conditions. Such measurements enable the development of intervention strategies for preventing or treating diseases by modulation of desired molecular processes. Fluorescence-based techniques are routinely employed for accurate and robust measurements of in-vitro activity of molecular targets and for discovering novel chemical molecules that modulate the activity of molecular targets. In the current review, the authors focus on the applications of fluorescence-based high throughput screening (HTS) and fragment-based ligand discovery (FBLD) techniques such as fluorescence polarization (FP), Förster resonance energy transfer (FRET), fluorescence thermal shift assay (FTSA) and microscale thermophoresis (MST) for the discovery of chemical probe to exploring target's role in disease biology and ultimately, serve as a foundation for drug discovery. Some recent advancements in these techniques for compound library screening against important classes of drug targets, such as G-protein-coupled receptors (GPCRs) and GTPases, as well as phosphorylation- and acetylation-mediated protein-protein interactions, are discussed. Overall, this review presents a landscape of how these techniques paved the way for the discovery of small-molecule modulators and biologics against these targets for therapeutic benefits.
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Affiliation(s)
| | | | - Thazhe Kootteri Prasad
- Centre for Chemical Biology & Therapeutics, inStem & NCBS, Bellary Road, Bangalore, 560065, India
| | - Kavyashree Manjunath
- Centre for Chemical Biology & Therapeutics, inStem & NCBS, Bellary Road, Bangalore, 560065, India
| | - Sneha Bairy
- Centre for Chemical Biology & Therapeutics, inStem & NCBS, Bellary Road, Bangalore, 560065, India
| | - Akshaya S. Vasu
- Centre for Chemical Biology & Therapeutics, inStem & NCBS, Bellary Road, Bangalore, 560065, India
| | - B. Ganavi
- Centre for Chemical Biology & Therapeutics, inStem & NCBS, Bellary Road, Bangalore, 560065, India
| | - Subbarao Jasti
- Centre for Chemical Biology & Therapeutics, inStem & NCBS, Bellary Road, Bangalore, 560065, India
| | - Neelagandan Kamariah
- Centre for Chemical Biology & Therapeutics, inStem & NCBS, Bellary Road, Bangalore, 560065, India
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7
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Szapoczka WK, Truskewycz AL, Skodvin T, Holst B, Thomas PJ. Fluorescence intensity and fluorescence lifetime measurements of various carbon dots as a function of pH. Sci Rep 2023; 13:10660. [PMID: 37391469 DOI: 10.1038/s41598-023-37578-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 06/23/2023] [Indexed: 07/02/2023] Open
Abstract
Measurement and monitoring of pH are essential in both the industry and academia. It is therefore important to continue developing novel, low-cost pH sensors that provide increased accuracy over long periods of time. Particularly promising are sensors based on materials that show pH-dependent fluorescence intensity (FI) and lifetime (FL). Carbon dots (CDs) are emerging as promising candidates because of their low cost, ease of manufacturing, low toxicity, and negligible photobleaching. However, little has been done to quantify the FI and FL values of CDs. Here we report the characterisation of the pH-dependent FI and FL of four novel solvothermal synthesised CDs. The fifth CD is used as a reference sample and was synthesised following a published synthesis. The precursors for the CDs include disperse blue 1 dye, phloroglucinol, m-phenylenediamine (m-PD), N, and N-dimethylformamide (DMF). The average diameter size of the CDs ranges from 1.5 to 15 nm. An excitation wavelength of 452 nm with a bandwidth of 45 nm was used to quantify the fluorescence in the pH range 5-9. Three CDs show a decreasing trend in FI with pH, while two CDs show an increasing trend. None of the CDs shows strong FL dependence. The FL changes around 0.5 ± 0.2 ns across the tested pH range. We suggest that the differences in the fluorescence trends can be attributed to the precursors chosen for synthesising the CDs.
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Affiliation(s)
- Wiktoria K Szapoczka
- Department of Physics and Technology, University of Bergen, 5007, Bergen, Norway.
| | - Adam L Truskewycz
- Department of Biomedicine, University of Bergen, 5009, Bergen, Norway
| | - Tore Skodvin
- Department of Chemistry, University of Bergen, 5007, Bergen, Norway
| | - Bodil Holst
- Department of Physics and Technology, University of Bergen, 5007, Bergen, Norway
| | - Peter J Thomas
- NORCE Norwegian Research Centre AS, 5008, Bergen, Norway
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8
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Li C, Luo Y, Huang Y, Qiu H, Lu Z. A Low-Cost Test Method for Accurate Detection of Different Excited-State Species with a Lifetime Span over 5 Orders of Magnitude in One Time Window. Anal Chem 2023; 95:8150-8155. [PMID: 37155725 DOI: 10.1021/acs.analchem.3c00319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Accurate quantification on the quantum yields (φ) of both the prompt fluorescence (PF) and the delayed fluorescence (DF) species is quite essential for the clarification of molecular design rationales for thermally activated delayed fluorescence (TADF) luminogens. Currently, most φPF and φDF data of TADF fluorophores were acquired through time-correlated single-photon counting (TCSPC) lifetime measurement systems. However, because of their equal-time-channel working manner, so far all the commercially available TCSPC systems cannot render accurate measurement on φPF of TADF materials due to the lack of enough valid data points in the faster decay region of the corresponding photoluminescence (PL) decay curves. Although an intensified charge coupled device (ICCD) system equipped with a streak camera or an optical parametric oscillation laser has been proven to be a powerful tool for accurate determination of φPF and φDF of TADF fluorophores, the ultrahigh cost of these ICCD systems makes them inaccessible to most users. Herein, by replacing the timing module of a commercial TCSPC system with a low-cost and versatile time-to-digital converter (TDC) module, we developed a modified TCSPC system that can work in an unequal-time-channel manner. The resultant TDC-TCSPC system can not only concurrently determine the accurate lifetime of PF and DF species whose lifetime span even exceeds 5 orders of magnitude in just one time window but also render accurate measurements on φPF and φDF of TADF fluorophores. The reliability of the TDC-TCSPC method was verified through TCSPC- and ICCD-based comparative experiments on ACMPS, a known TADF fluorophore. Our results not only can provide a low-cost and convenient test method for accurate determination of key experimental data of TADF materials but also will facilitate deeper understanding of the molecular design principles for high-performance TADF materials.
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Affiliation(s)
- Chuan Li
- Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yanju Luo
- Analytical & Testing Center, Sichuan University, Chengdu 610064, P. R. China
| | - Yan Huang
- Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Hailin Qiu
- Orient KOJI Limited, Tianjin 300122, P. R. China
| | - Zhiyun Lu
- Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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9
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Li Y, Cai DG, Zhu ZH, Xu H, Zheng TF, Chen JL, Liu SJ, Wen HR. Solvothermal synthesis and device fabrication of a Eu 3+-based metal-organic framework as a turn-on and blue-shift fluorescence sensor toward Cr 3+, Al 3+ and Ga 3. Dalton Trans 2023; 52:4167-4175. [PMID: 36892084 DOI: 10.1039/d2dt03230a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
A novel three-dimensional Eu3+-based metal-organic framework with the formula {[(CH3)2NH2][Eu(BTDI)]·H2O·DMF}n (JXUST-25) was prepared by solvothermal method based on Eu3+ and 5,5'-(benzothiadiazole-4,7-diyl)diisophthalic acid (H4BTDI) with benzothiadiazole (BTD) luminescent groups. Due to the presence of Eu3+ and organic fluorescence ligand, JXUST-25 displays turn-on and blue-shift fluorescence toward Cr3+, Al3+ and Ga3+ with limits of detection (LOD) of 0.073, 0.006 and 0.030 ppm, respectively. Interestingly, the alkaline environment can change the fluorescence of JXUST-25 toward Cr3+/Al3+/Ga3+ and the addition of HCl solution realizes the reversible change of the fluorescence of JXUST-25 toward Cr3+/Al3+/Ga3+. It is noteworthy that the fluorescent test paper and light-emitting diode lamp based on JXUST-25 can effectively detect Cr3+, Al3+ and Ga3+ by the visual changes. In addition, the turn-on and blue-shift fluorescence between JXUST-25 and M3+ ions may be caused by the host-guest interaction and the absorbance caused enhancement mechanism.
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Affiliation(s)
- Yu Li
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
| | - Ding-Gui Cai
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
| | - Zi-Hao Zhu
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
| | - Hui Xu
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
| | - Teng-Fei Zheng
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
| | - Jing-Lin Chen
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
| | - Sui-Jun Liu
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
| | - He-Rui Wen
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
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10
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Singh D, Tomar S, Singh S, Chaudhary G, Singh AP, Gupta R. A fluorescent pH switch probe for the ‘turn-on’ dual-channel discriminative detection of magnesium and zinc ions. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114334] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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11
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Soundaram Jeevarathinam A, Saleem W, Martin N, Hu C, McShane MJ. NIR Luminescent Oxygen-Sensing Nanoparticles for Continuous Glucose and Lactate Monitoring. BIOSENSORS 2023; 13:bios13010141. [PMID: 36671976 PMCID: PMC9855917 DOI: 10.3390/bios13010141] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 05/09/2023]
Abstract
A highly sensitive, biocompatible, and scalable phosphorescent oxygen sensor formulation is designed and evaluated for use in continuous metabolite sensors for biological systems. Ethyl cellulose (EC) and polystyrene (PS) nanoparticles (NPs) stabilized with Pluronic F68 (PF 68), Polydimethylsiloxane-b-polyethyleneglycol methyl ether (PDMS-PEG), sodium dodecylsulfate (SDS), and cetyltimethylammonium bromide (CTAB) were prepared and studied. The resulting NPs with eight different surfactant−polymer matrix combinations were evaluated for physical properties, oxygen sensitivity, effect of changes in dispersion matrix, and cytotoxicity. The EC NPs exhibited a narrower size distribution and 40% higher sensitivity than PS, with Stern−Volmer constants (Ksv) 0.041−0.052 µM−1 for EC, compared to 0.029−0.034 µM−1 for PS. Notably, ethyl cellulose NPs protected with PF68 were selected as the preferred formulation, as they were not cytotoxic towards 3T3 fibroblasts and exhibited a wide phosphorescence lifetime response of >211.1 µs over 258−0 µM and ~100 µs over 2.58−0 µM oxygen, with a limit of detection (LoD) of oxygen in aqueous phase of 0.0016 µM. The EC-PF68 NPs were then efficiently encapsulated in alginate microparticles along with glucose oxidase (GOx) and catalase (CAT) to form phosphorescent nanoparticles-in-microparticle (NIMs) glucose sensing microdomains. The fabricated glucose sensors showed a sensitivity of 0.40 µs dL mg−1 with a dynamic phosphorescence lifetime range of 46.6−197.1 µs over 0−150 mg dL−1 glucose, with a glucose LoD of 18.3 mg dL−1 and maximum distinguishable concentration of 111.1 mg dL−1. Similarly, lactate sensors were prepared with NIMs microdomains containing lactate oxidase (LOx) and found to have a detection range of 0−14 mg dL−1 with LoD of 1.8 mg dL−1 and maximum concentration of 13.7 mg dL−1 with lactate sensitivity of 10.7 µs dL mg−1. Owing to its versatility, the proposed NIMs-based design can be extended to a wide range of metabolites and different oxygen-sensing dyes with different excitation wavelengths based on specific application.
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Affiliation(s)
| | - Waqas Saleem
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Nya Martin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Connie Hu
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Michael J. McShane
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
- Materials Science and Engineering, Texas A&M University, College Station, TX 77845, USA
- Correspondence: (M.J.M.)
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12
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Varshney A, Kumar A. A2B corroles: fluorescent signalling system for Hg2+ ion. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02114-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Singh D, Ibrahim A, Kumar P, Gupta R. Methylene Spacer Mediated Detection Switch Between Copper and Zinc Ions by Two Coumarin‐Pyrene Based Chemosensors. ChemistrySelect 2022. [DOI: 10.1002/slct.202202574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Devender Singh
- Department of Chemistry University of Delhi New Delhi 110007 India
| | - Annan Ibrahim
- Department of Chemistry University of Delhi New Delhi 110007 India
| | - Pramod Kumar
- Department of Chemistry Mahamana Malviya College Khekra (Baghpat) C.C.S. University Meerut India
| | - Rajeev Gupta
- Department of Chemistry University of Delhi New Delhi 110007 India
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14
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Turn-on fluorescent detection of nickel and zinc ions by two related chemosensors containing naphthalimide ring(s). J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132901] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Adelizzi B, Gielen V, Le Saux T, Dedecker P, Jullien L. Quantitative Model for Reversibly Photoswitchable Sensors. ACS Sens 2021; 6:1157-1165. [PMID: 33565309 PMCID: PMC8008439 DOI: 10.1021/acssensors.0c02414] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 01/21/2021] [Indexed: 12/11/2022]
Abstract
Composed of a reversibly photoswitchable unit allosterically linked to a sensing module, reversibly photoswitchable sensors (rs-sensors) represent a new and attractive strategy to quantitatively read-out analyte concentrations. However, their kinetic response to illumination is complex, and much attention is required from the design to the application steps. Here, we exploit a generic kinetic model of rs-sensors which enables us to point to key thermokinetic parameters, such as dissociation constants and kinetic rates for exchange toward the analyte, and cross-sections for photoswitching. The application of the model allows to evaluate the robustness of the analyzed parameters and to introduce a methodology for their reliable use. Model and methodology have been experimentally tested on a newly reported calcium sensor based on a reversibly photoswitchable green fluorescent protein allosterically linked to a calcium-sensing module integrating calmodulin and an RS20 peptide.
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Affiliation(s)
- Beatrice Adelizzi
- PASTEUR,
Département de Chimie, École
Normale Supérieure, PSL University, Sorbonne Université,
CNRS, 24, rue Lhomond, Paris 75005, France
| | - Vincent Gielen
- Laboratory
for Nanobiology, Department of Chemistry, KU Leuven, Celestijnenlaan
200G, Heverlee 3001, Belgium
| | - Thomas Le Saux
- PASTEUR,
Département de Chimie, École
Normale Supérieure, PSL University, Sorbonne Université,
CNRS, 24, rue Lhomond, Paris 75005, France
| | - Peter Dedecker
- Laboratory
for Nanobiology, Department of Chemistry, KU Leuven, Celestijnenlaan
200G, Heverlee 3001, Belgium
| | - Ludovic Jullien
- PASTEUR,
Département de Chimie, École
Normale Supérieure, PSL University, Sorbonne Université,
CNRS, 24, rue Lhomond, Paris 75005, France
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16
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Cano Perez JL, Gutiérrez-Gutiérrez J, Perezcampos Mayoral C, Pérez-Campos EL, Pina Canseco MDS, Tepech Carrillo L, Mayoral LPC, Vargas Treviño M, Apreza EL, Rojas Laguna R. Fiber Optic Sensors: A Review for Glucose Measurement. BIOSENSORS 2021; 11:61. [PMID: 33669087 PMCID: PMC7996499 DOI: 10.3390/bios11030061] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 02/20/2021] [Accepted: 02/22/2021] [Indexed: 12/27/2022]
Abstract
Diabetes mellitus is a chronic metabolic disorder, being globally one of the most deadly diseases. This disease requires continually monitoring of the body's glucose levels. There are different types of sensors for measuring glucose, most of them invasive to the patient. Fiber optic sensors have been proven to have advantages compared to conventional sensors and they have great potential for various applications, especially in the biomedical area. Compared to other sensors, they are smaller, easy to handle, mostly non-invasive, thus leading to a lower risk of infection, high precision, well correlated and inexpensive. The objective of this review article is to compare different types of fiber optic sensors made with different experimental techniques applied to biomedicine, especially for glucose sensing. Observations are made on the way of elaboration, as well as the advantages and disadvantages that each one could have in real applications.
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Affiliation(s)
- José Luis Cano Perez
- Doctorado in Biociencias, Facultad de Medicina y Cirugia, Universidad Autónoma “Benito Juárez” de Oaxaca. Ex Hacienda de Aguilera S/N, Calz. San Felipe del Agua, Oaxaca de Juárez 68120, Mexico;
| | - Jaime Gutiérrez-Gutiérrez
- Escuela de Sistemas Biologicos e Innovacion Tecnologica, Universidad Autónoma “Benito Juárez” de Oaxaca (ESBIT-UABJO), Av. Universidad S/N, Ex-Hacienda 5 Señores, Oaxaca de Juárez 68120, Mexico; (L.T.C.); (M.V.T.); (E.L.A.)
| | - Christian Perezcampos Mayoral
- Doctorado in Biociencias, Facultad de Medicina y Cirugia, Universidad Autónoma “Benito Juárez” de Oaxaca. Ex Hacienda de Aguilera S/N, Calz. San Felipe del Agua, Oaxaca de Juárez 68120, Mexico;
| | - Eduardo L. Pérez-Campos
- Facultad de Medicina y Cirugia, Universidad Autónoma “Benito Juárez” de Oaxaca. Ex Hacienda de Aguilera S/N, Calz. San Felipe del Agua, Oaxaca de Juárez 68120, Mexico; (E.L.P.-C.); (M.d.S.P.C.); (L.P.-C.M.)
| | - Maria del Socorro Pina Canseco
- Facultad de Medicina y Cirugia, Universidad Autónoma “Benito Juárez” de Oaxaca. Ex Hacienda de Aguilera S/N, Calz. San Felipe del Agua, Oaxaca de Juárez 68120, Mexico; (E.L.P.-C.); (M.d.S.P.C.); (L.P.-C.M.)
| | - Lorenzo Tepech Carrillo
- Escuela de Sistemas Biologicos e Innovacion Tecnologica, Universidad Autónoma “Benito Juárez” de Oaxaca (ESBIT-UABJO), Av. Universidad S/N, Ex-Hacienda 5 Señores, Oaxaca de Juárez 68120, Mexico; (L.T.C.); (M.V.T.); (E.L.A.)
| | - Laura Pérez-Campos Mayoral
- Facultad de Medicina y Cirugia, Universidad Autónoma “Benito Juárez” de Oaxaca. Ex Hacienda de Aguilera S/N, Calz. San Felipe del Agua, Oaxaca de Juárez 68120, Mexico; (E.L.P.-C.); (M.d.S.P.C.); (L.P.-C.M.)
| | - Marciano Vargas Treviño
- Escuela de Sistemas Biologicos e Innovacion Tecnologica, Universidad Autónoma “Benito Juárez” de Oaxaca (ESBIT-UABJO), Av. Universidad S/N, Ex-Hacienda 5 Señores, Oaxaca de Juárez 68120, Mexico; (L.T.C.); (M.V.T.); (E.L.A.)
| | - Edmundo López Apreza
- Escuela de Sistemas Biologicos e Innovacion Tecnologica, Universidad Autónoma “Benito Juárez” de Oaxaca (ESBIT-UABJO), Av. Universidad S/N, Ex-Hacienda 5 Señores, Oaxaca de Juárez 68120, Mexico; (L.T.C.); (M.V.T.); (E.L.A.)
| | - Roberto Rojas Laguna
- Division de Ingenierias, Campus Irapuato-Salamanca, Universidad de Guanajuato, Carretera Salamanca-Valle de Santiago km 3.5 + 1.8, Comunidad de Palo Blanco, Salamanca 36885, Mexico;
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17
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Yonemoto DT, Papa CM, Mongin C, Castellano FN. Thermally Activated Delayed Photoluminescence: Deterministic Control of Excited-State Decay. J Am Chem Soc 2020; 142:10883-10893. [PMID: 32497428 DOI: 10.1021/jacs.0c03331] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Thermally activated photophysical processes are ubiquitous in numerous organic and metal-organic molecules, leading to chromophores with excited-state properties that can be considered an equilibrium mixture of the available low-lying states. Relative populations of the equilibrated states are governed by temperature. Such molecules have been devised as high quantum yield emitters in modern organic light-emitting diode technology and for deterministic excited-state lifetime control to enhance chemical reactivity in solar energy conversion and photocatalytic schemes. The recent discovery of thermally activated photophysics at CdSe nanocrystal-molecule interfaces enables a new paradigm wherein molecule-quantum dot constructs are used to systematically generate material with predetermined photophysical response and excited-state properties. Semiconductor nanomaterials feature size-tunable energy level engineering, which considerably expands the purview of thermally activated photophysics beyond what is possible using only molecules. This Perspective is intended to provide a nonexhaustive overview of the advances that led to the integration of semiconductor quantum dots in thermally activated delayed photoluminescence (TADPL) schemes and to identify important challenges moving into the future. The initial establishment of excited-state lifetime extension utilizing triplet-triplet excited-state equilibria is detailed. Next, advances involving the rational design of molecules composed of both metal-containing and organic-based chromophores that produce the desired TADPL are described. Finally, the recent introduction of semiconductor nanomaterials into hybrid TADPL constructs is discussed, paving the way toward the realization of fine-tuned deterministic control of excited-state decay. It is envisioned that libraries of synthetically facile composites will be broadly deployed as photosensitizers and light emitters for numerous synthetic and optoelectronic applications in the near future.
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Affiliation(s)
- Daniel T Yonemoto
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Christopher M Papa
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Cedric Mongin
- Laboratoire PPSM, ENS Paris-Saclay, 61 Avenue du Président Wilson, 94235 Cachan CEDEX, France
| | - Felix N Castellano
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
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18
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Junek J, Ondič L, Žídek K. Random temporal laser speckles for the robust measurement of sub-microsecond photoluminescence decay. OPTICS EXPRESS 2020; 28:12363-12372. [PMID: 32403734 DOI: 10.1364/oe.382811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
Time-resolved photoluminescence (PL) is commonly used to track dynamics in a broad range of materials. Thus, the search for simplification of the acquisition of PL kinetics attracts continuous attention. This paper presents a new robust and straightforward approach to the measurement of PL decay, which is based on randomly fluctuating excitation intensity. The random excitation waveform is attained by using laser speckles generated on a rotating diffuser. Owing to this, the presented technique is able to utilize any coherent excitation source without the necessity to generate short pulses or to controllably modulate the light. PL decay can be computationally reconstructed from the Fourier image of the PL trace. The paper demonstrates the performance of the method, which is able to acquire sub-microsecond dynamics as the impulse response function reaches 300 ns. The reconstructed PL decays were compared to streak camera measurements to verify the method. Finally, potential limitations and applications of the technique are discussed.
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19
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Liu X, Chen T, Yu F, Shang Y, Meng X, Chen ZR. AIE-Active Random Conjugated Copolymers Synthesized by ADMET Polymerization as a Fluorescent Probe Specific for Palladium Detection. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00042] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xiaoqing Liu
- Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518005, China
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518005, China
| | - Taixin Chen
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518005, China
| | - Feng Yu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518005, China
| | - Yuxuan Shang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518005, China
| | - Xue Meng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518005, China
| | - Zhong-Ren Chen
- Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518005, China
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518005, China
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20
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Coomer CA, Carlon-Andres I, Iliopoulou M, Dustin ML, Compeer EB, Compton AA, Padilla-Parra S. Single-cell glycolytic activity regulates membrane tension and HIV-1 fusion. PLoS Pathog 2020; 16:e1008359. [PMID: 32084246 PMCID: PMC7055913 DOI: 10.1371/journal.ppat.1008359] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 03/04/2020] [Accepted: 01/27/2020] [Indexed: 12/21/2022] Open
Abstract
There has been resurgence in determining the role of host metabolism in viral infection yet deciphering how the metabolic state of single cells affects viral entry and fusion remains unknown. Here, we have developed a novel assay multiplexing genetically-encoded biosensors with single virus tracking (SVT) to evaluate the influence of global metabolic processes on the success rate of virus entry in single cells. We found that cells with a lower ATP:ADP ratio prior to virus addition were less permissive to virus fusion and infection. These results indicated a relationship between host metabolic state and the likelihood for virus-cell fusion to occur. SVT revealed that HIV-1 virions were arrested at hemifusion in glycolytically-inactive cells. Interestingly, cells acutely treated with glycolysis inhibitor 2-deoxyglucose (2-DG) become resistant to virus infection and also display less surface membrane cholesterol. Addition of cholesterol in these in glycolytically-inactive cells rescued the virus entry block at hemifusion and enabled completion of HIV-1 fusion. Further investigation with FRET-based membrane tension and membrane order reporters revealed a link between host cell glycolytic activity and host membrane order and tension. Indeed, cells treated with 2-DG possessed lower plasma membrane lipid order and higher tension values, respectively. Our novel imaging approach that combines lifetime imaging (FLIM) and SVT revealed not only changes in plasma membrane tension at the point of viral fusion, but also that HIV is less likely to enter cells at areas of higher membrane tension. We therefore have identified a connection between host cell glycolytic activity and membrane tension that influences HIV-1 fusion in real-time at the single-virus fusion level in live cells.
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Affiliation(s)
- Charles A. Coomer
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
- HIV Dynamics and Replication Program, National Cancer Institute, Frederick, Maryland, United States of America
- University of Kentucky, College of Medicine, Lexington, Kentucky, United States of America
- Division of Structural Biology, Wellcome Centre Human Genetics, University of Oxford, United Kingdom
| | - Irene Carlon-Andres
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
- Division of Structural Biology, Wellcome Centre Human Genetics, University of Oxford, United Kingdom
| | - Maro Iliopoulou
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Michael L. Dustin
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Ewoud B. Compeer
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Alex A. Compton
- HIV Dynamics and Replication Program, National Cancer Institute, Frederick, Maryland, United States of America
| | - Sergi Padilla-Parra
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
- Division of Structural Biology, Wellcome Centre Human Genetics, University of Oxford, United Kingdom
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21
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Kong M, Gu Y, Liu Y, Shi Y, Wu N, Feng W, Li F. Luminescence Lifetime-Based In Vivo Detection with Responsive Rare Earth-Dye Nanocomposite. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1904487. [PMID: 31565853 DOI: 10.1002/smll.201904487] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/13/2019] [Indexed: 05/28/2023]
Abstract
For years, luminescence lifetime imaging has served as a quantitative tool in indicating intracellular components and activities. However, very few studies involve the in vivo study of animals, especially in vivo stimuli-responsive activities of animals, as both excitation and emission wavelengths should fall into the near-infrared (NIR) optical transparent window (660-950 and 1000-1500 nm). Herein, this work reports a lifetime-responsive nanocomposite with both excitation and emission in the NIR I window (800 nm) and lifetime in the microsecond region. The incorporation of Tm3+ -doped rare-earth nanocrystals and NIR dye builds an efficient energy transfer pathway that enables a tunable luminescence lifetime range. The NaYF4 :Tm nanocrystal, which absorbs and emits photons at the same energy level, is found to be 33 times brighter than optimized core-shell upconversion nanocrystals, and proved to be an effective donor for NIR luminescence resonance energy transfer (LRET). The anti-interference capability of luminescence lifetime signals is further confirmed by luminescence and lifetime imaging. In vivo studies also verify the lifetime response upon stimulation generated in an arthritis mouse model. This work introduces an intriguing tool for luminescence lifetime-based sensing in the microsecond region.
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Affiliation(s)
- Mengya Kong
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Yuyang Gu
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Yulai Liu
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Yibing Shi
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Na Wu
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Wei Feng
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Fuyou Li
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
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22
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Chihara T, Umezawa M, Miyata K, Sekiyama S, Hosokawa N, Okubo K, Kamimura M, Soga K. Biological Deep Temperature Imaging with Fluorescence Lifetime of Rare-Earth-Doped Ceramics Particles in the Second NIR Biological Window. Sci Rep 2019; 9:12806. [PMID: 31488857 PMCID: PMC6728332 DOI: 10.1038/s41598-019-49291-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 08/22/2019] [Indexed: 01/10/2023] Open
Abstract
Contactless thermal imaging generally relies on mid-infrared cameras and fluorescence imaging with temperature-sensitive phosphors. Fluorescent thermometry in the near-infrared (NIR) region is an emerging technique for analysing deep biological tissues but still requires observation depth calibration. We present an NIR fluorescence time-gated imaging (TGI) thermometry technology based on fluorescence lifetime, an intrinsic fluorophore time constant unrelated to observation depth. Fluorophore used is NaYF4 co-doped with Nd3+ and Yb3+ that emits fluorescence at 1000 nm. An agarose gel-based phantom with the fluorophore embedded at a 5-mm depth was covered by sheets of meat to vary the observation depth. The temperature was determined independently from depth by sequences of NIR fluorescence decay images, and the rate of change in the fluorescence lifetime per temperature was almost constant (-0.0092 ~ -0.010 °C-1) at depths ranging from 0 to 1.4 mm of meat, providing non-contact and absolute measurements of temperature in deep biological tissues.
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Affiliation(s)
- Takumi Chihara
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan
| | - Masakazu Umezawa
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan.
| | - Keiji Miyata
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan
| | - Shota Sekiyama
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan
| | - Naoki Hosokawa
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan
| | - Kyohei Okubo
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan
| | - Masao Kamimura
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan
- Imaging Frontier Center (IFC), Research Institute for Science and Technology (RIST), Tokyo University of Science, 2641 Yamazaki, Noda, Japan
| | - Kohei Soga
- Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, Japan.
- Imaging Frontier Center (IFC), Research Institute for Science and Technology (RIST), Tokyo University of Science, 2641 Yamazaki, Noda, Japan.
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23
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Syzgantseva MA, Stepanov NF, Syzgantseva OA. Carrier Lifetimes and Recombination Pathways in Metal-Organic Frameworks. J Phys Chem Lett 2019; 10:5041-5046. [PMID: 31411032 DOI: 10.1021/acs.jpclett.9b02051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Understanding the excited-state charge carrier relaxation in metal-organic frameworks (MOFs) and revealing ways to alternate its rate are of primary importance for the development of novel hybrid photoactive materials with sufficiently long carrier lifetimes; in particular, shedding light on the main recombination pathways in this class of compounds is needed. Therefore, in this work the radiative and phonon-assisted nonradiative electron-hole recombination is investigated theoretically for a model MOF system, and the nonradiative pathway is demonstrated to be dominant even for a pristine defect-free material. Theoretically predicted electron-hole lifetimes are in line with the available experimental data, suggesting that the adopted methodology is suitable for prediction of carrier lifetimes and helpful for the interpretation of experimental data. Based on the obtained conclusions, the principles for modification of MOF geometrical and chemical structure, enabling the extension of carrier lifetimes, are formulated.
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Affiliation(s)
- Maria A Syzgantseva
- Laboratory of Quantum Mechanics and Molecular Structure, Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Nikolay F Stepanov
- Laboratory of Quantum Mechanics and Molecular Structure, Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Olga A Syzgantseva
- Laboratory of Molecular Simulation (LSMO), Institut des Sciences et Ingénierie Chimiques, Valais, Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de l'Industrie 17, CH-1951 Sion, Switzerland
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24
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Mbalaha Z, Edwards PR, Birch DJ, Chen Y. Synthesis of Small Gold Nanorods and Their Subsequent Functionalization with Hairpin Single Stranded DNA. ACS OMEGA 2019; 4:13740-13746. [PMID: 31497691 PMCID: PMC6714599 DOI: 10.1021/acsomega.9b01200] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 07/30/2019] [Indexed: 06/10/2023]
Abstract
Small gold nanorods have a significantly large absorption/scattering ratio and are especially beneficial in exploiting photothermal effects, for example in photothermal therapy and remote drug release. This work systematically investigates the influence of growth conditions on the size, growth yield, and stability of small gold nanorods. The silver-assisted seed-mediated growth method was optimized to synthesize stable small gold nanorods with a high growth yield (>85%). Further study on the influence of silver ions on the growth facilitates the growth of small gold nanorods with tunable longitudinal surface plasmon resonance from 613 to 912 nm, with average dimensions of 13-25 nm in length and 5-6 nm in diameter. Moreover, the small gold nanorods were successfully functionalized with thiol-modified hairpin oligonucleotides (hpDNA) labeled with Cy5. Fluorescence intensity measurements show an increase in the presence of target DNA and an enhanced signal/background ratio when the longitudinal surface plasmon resonance of small gold nanorods overlaps with the excitation and emission wavelength of Cy5. This coincides with a reduced fluorescence lifetime of Cy5 in the hairpin structure, indicating surface plasmon resonance-enhanced energy transfer to the small gold nanorods. This study may provide insight on the synthesis and functionalization of small gold nanorods in biomedical sensing and therapy.
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Affiliation(s)
- Zendesha
S. Mbalaha
- Department of Physics, Scottish Universities
Physics Alliance, University of Strathclyde, 107 Rottenrow, Glasgow G4 0NG, U.K.
| | - Paul R. Edwards
- Department of Physics, Scottish Universities
Physics Alliance, University of Strathclyde, 107 Rottenrow, Glasgow G4 0NG, U.K.
| | - David J.S. Birch
- Department of Physics, Scottish Universities
Physics Alliance, University of Strathclyde, 107 Rottenrow, Glasgow G4 0NG, U.K.
| | - Yu Chen
- Department of Physics, Scottish Universities
Physics Alliance, University of Strathclyde, 107 Rottenrow, Glasgow G4 0NG, U.K.
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25
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Yarnell JE, Wells KA, Palmer JR, Breaux JM, Castellano FN. Excited-State Triplet Equilibria in a Series of Re(I)-Naphthalimide Bichromophores. J Phys Chem B 2019; 123:7611-7627. [PMID: 31405284 DOI: 10.1021/acs.jpcb.9b05688] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present the synthesis, structural characterization, electronic structure calculations, and the ultrafast and supra-nanosecond photophysical properties of a series of five bichromophores of the general structural formula [Re(5-R-phen)(CO)3(dmap)](PF6), where R is a naphthalimide (NI), phen = 1,10-phenanthroline, and dmap is 4-dimethylaminopyridine. The NI chromophores were systematically modified at their 4-positions with -H (NI), -Br (BrNI), phenoxy (PONI), thiobenzene (PSNI), and piperidine (PNI), rendering a series of metal-organic bichromophores (Re1-Re5, respectively) featuring variability in the singlet and triplet energies in the pendant NI subunit. Five closely related organic chromophores as well as [Re(phen)(CO)3(dmap)](PF6) (Re6) were investigated in parallel to appropriately model the photophysical properties exhibited in the bichromophores. The excited state processes of all molecules in this study were elucidated using a combination of transient absorption spectroscopy and time-resolved photoluminescence (PL) spectroscopy, revealing the kinetics of the energy transfer processes occurring between the appended chromophores. The spectroscopic analysis was further supported by electronic structure calculations which identified the origin of many of the experimentally observed electronic transitions.
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Affiliation(s)
- James E Yarnell
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States.,Department of Chemistry & Chemistry Research Center, United States Air Force Academy, Colorado Springs, Colorado 80840-6230 United States
| | - Kaylee A Wells
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Jonathan R Palmer
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Josué M Breaux
- Department of Chemistry & Chemistry Research Center, United States Air Force Academy, Colorado Springs, Colorado 80840-6230 United States
| | - Felix N Castellano
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
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Kumar V, Kumar P, Kumar S, Singhal D, Gupta R. Turn-On Fluorescent Sensors for the Selective Detection of Al 3+ (and Ga 3+) and PPi Ions. Inorg Chem 2019; 58:10364-10376. [PMID: 31342750 DOI: 10.1021/acs.inorgchem.9b01550] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rationally designed multiple hydroxyl-group-based chemosensors L1-L4 containing arene-based fluorophores are presented for the selective detection of Al3+ and Ga3+ ions. Changes in the absorption and emission spectra of L1-L4 in ethanol were easily observable upon the addition of Al3+ and Ga3+ ions. Competitive binding studies, detection limits, and binding constants illustrate significant sensing abilities of these chemosensors with L4, showing the best results. The interaction of Al3+/Ga3+ ions with chemosensor L4 was investigated by fluorescence lifetime measurements, whereas Job's plot, high-resolution mass spectrometry, and 1H NMR spectral titrations substantiated the stoichiometry between L4 and Al3+/Ga3+ ions. The solution-generated [L-M3+] species further detected pyrophosphate ion (PPi) by exhibiting emission enhancement and a visible color change. The binding of Al3+/Ga3+ ions with chemosensor L4 was further supported by density functional theory studies. Reversibility for the detection of Al3+/Ga3+ ions was achieved by utilizing a suitable proton source. The multiionic response, reversibility, and optical visualization of the present chemosensors make them ideal for practical applications for real samples, which have been illustrated by paper-strip as well as polystyrene film-based detection.
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Affiliation(s)
- Vijay Kumar
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Pramod Kumar
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Sushil Kumar
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Divya Singhal
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Rajeev Gupta
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
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27
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Villena Gonzales W, Mobashsher AT, Abbosh A. The Progress of Glucose Monitoring-A Review of Invasive to Minimally and Non-Invasive Techniques, Devices and Sensors. SENSORS (BASEL, SWITZERLAND) 2019; 19:E800. [PMID: 30781431 PMCID: PMC6412701 DOI: 10.3390/s19040800] [Citation(s) in RCA: 218] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/20/2019] [Accepted: 01/22/2019] [Indexed: 02/07/2023]
Abstract
Current glucose monitoring methods for the ever-increasing number of diabetic people around the world are invasive, painful, time-consuming, and a constant burden for the household budget. The non-invasive glucose monitoring technology overcomes these limitations, for which this topic is significantly being researched and represents an exciting and highly sought after market for many companies. This review aims to offer an up-to-date report on the leading technologies for non-invasive (NI) and minimally-invasive (MI) glucose monitoring sensors, devices currently available in the market, regulatory framework for accuracy assessment, new approaches currently under study by representative groups and developers, and algorithm types for signal enhancement and value prediction. The review also discusses the future trend of glucose detection by analyzing the usage of the different bands in the electromagnetic spectrum. The review concludes that the adoption and use of new technologies for glucose detection is unavoidable and closer to become a reality.
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Affiliation(s)
- Wilbert Villena Gonzales
- School of Information Technology and Electrical Engineering, The University of Queensland, St Lucia, Brisbane 4072, Australia.
| | - Ahmed Toaha Mobashsher
- School of Information Technology and Electrical Engineering, The University of Queensland, St Lucia, Brisbane 4072, Australia.
| | - Amin Abbosh
- School of Information Technology and Electrical Engineering, The University of Queensland, St Lucia, Brisbane 4072, Australia.
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28
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Ahadian S, Civitarese R, Bannerman D, Mohammadi MH, Lu R, Wang E, Davenport-Huyer L, Lai B, Zhang B, Zhao Y, Mandla S, Korolj A, Radisic M. Organ-On-A-Chip Platforms: A Convergence of Advanced Materials, Cells, and Microscale Technologies. Adv Healthc Mater 2018; 7. [PMID: 29034591 DOI: 10.1002/adhm.201700506] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 06/15/2017] [Indexed: 12/11/2022]
Abstract
Significant advances in biomaterials, stem cell biology, and microscale technologies have enabled the fabrication of biologically relevant tissues and organs. Such tissues and organs, referred to as organ-on-a-chip (OOC) platforms, have emerged as a powerful tool in tissue analysis and disease modeling for biological and pharmacological applications. A variety of biomaterials are used in tissue fabrication providing multiple biological, structural, and mechanical cues in the regulation of cell behavior and tissue morphogenesis. Cells derived from humans enable the fabrication of personalized OOC platforms. Microscale technologies are specifically helpful in providing physiological microenvironments for tissues and organs. In this review, biomaterials, cells, and microscale technologies are described as essential components to construct OOC platforms. The latest developments in OOC platforms (e.g., liver, skeletal muscle, cardiac, cancer, lung, skin, bone, and brain) are then discussed as functional tools in simulating human physiology and metabolism. Future perspectives and major challenges in the development of OOC platforms toward accelerating clinical studies of drug discovery are finally highlighted.
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Affiliation(s)
- Samad Ahadian
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Robert Civitarese
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Dawn Bannerman
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Mohammad Hossein Mohammadi
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Rick Lu
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Erika Wang
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Locke Davenport-Huyer
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Ben Lai
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Boyang Zhang
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Yimu Zhao
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Serena Mandla
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Anastasia Korolj
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
| | - Milica Radisic
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto M5S 3G9 Ontario Canada
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; Toronto M5S 3G9 Ontario Canada
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29
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Suzuki M, Akiba N, Kurosawa K, Akao Y, Higashikawa Y. Differentiation of black writing ink on paper using luminescence lifetime by time-resolved luminescence spectroscopy. Forensic Sci Int 2017; 279:281-287. [PMID: 28938198 DOI: 10.1016/j.forsciint.2017.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 08/31/2017] [Accepted: 09/04/2017] [Indexed: 11/28/2022]
Abstract
The time-resolved luminescence spectra and the lifetimes of eighteen black writing inks were measured to differentiate pen ink on altered documents. The spectra and lifetimes depended on the samples. About half of the samples only exhibited short-lived luminescence components on the nanosecond time scale. On the other hand, the other samples exhibited short- and long-lived components on the microsecond time scale. The samples could be classified into fifteen groups based on the luminescence spectra and dynamics. Therefore, luminescence lifetime can be used for the differentiation of writing inks, and luminescence lifetime imaging can be applied for the examination of altered documents.
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Affiliation(s)
- Mototsugu Suzuki
- Forensic Science Laboratory, Metropolitan Police Department, 2-1-1, Kasumigaseki, Chiyoda-ku, Tokyo 100-8929, Japan.
| | - Norimitsu Akiba
- National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan
| | - Kenji Kurosawa
- National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan
| | - Yoshinori Akao
- National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan
| | - Yoshiyasu Higashikawa
- National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan
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30
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Sharma DK, Irfanullah M, Basu SK, Madhu S, De S, Jadhav S, Ravikanth M, Chowdhury A. An approach to estimate spatial distribution of analyte within cells using spectrally-resolved fluorescence microscopy. Methods Appl Fluoresc 2017; 5:014003. [DOI: 10.1088/2050-6120/5/1/014003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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31
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Lee C, Johnson B, Jung T, Molnar A. A 72 × 60 Angle-Sensitive SPAD Imaging Array for Lens-less FLIM. SENSORS (BASEL, SWITZERLAND) 2016; 16:E1422. [PMID: 27598170 PMCID: PMC5038700 DOI: 10.3390/s16091422] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/16/2016] [Accepted: 08/26/2016] [Indexed: 12/31/2022]
Abstract
We present a 72 × 60, angle-sensitive single photon avalanche diode (A-SPAD) array for lens-less 3D fluorescence lifetime imaging. An A-SPAD pixel consists of (1) a SPAD to provide precise photon arrival time where a time-resolved operation is utilized to avoid stimulus-induced saturation, and (2) integrated diffraction gratings on top of the SPAD to extract incident angles of the incoming light. The combination enables mapping of fluorescent sources with different lifetimes in 3D space down to micrometer scale. Futhermore, the chip presented herein integrates pixel-level counters to reduce output data-rate and to enable a precise timing control. The array is implemented in standard 180 nm complementary metal-oxide-semiconductor (CMOS) technology and characterized without any post-processing.
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Affiliation(s)
- Changhyuk Lee
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA.
- Department of Electrical Engineering, Columbia University, New York, NY 10027, USA.
| | - Ben Johnson
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA.
- Cortera Neurotechnologies, 2150 Shattuck Ave., PH, Berkeley, CA 94704, USA.
| | - TaeSung Jung
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA.
- Department of Electrical Engineering, Columbia University, New York, NY 10027, USA.
| | - Alyosha Molnar
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA.
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32
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Doughty B, Simpson MJ, Yang B, Xiao K, Ma YZ. Simplification of femtosecond transient absorption microscopy data from CH₃NH₃PbI₃ perovskite thin films into decay associated amplitude maps. NANOTECHNOLOGY 2016; 27:114002. [PMID: 27308671 DOI: 10.1088/0957-4484/27/11/114002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This work aims to simplify multi-dimensional femtosecond transient absorption microscopy (TAM) data into decay associated amplitude maps (DAAMs) that describe the spatial distributions of dynamical processes occurring on various characteristic timescales. Application of this method to TAM data obtained from a model methyl-ammonium lead iodide (CH3NH3PbI3) perovskite thin film allows us to simplify the data set comprising 68 time-resolved images into four DAAMs. These maps offer a simple means to visualize the complex electronic excited-state dynamics in this system by separating distinct dynamical processes evolving on characteristic timescales into individual spatial images. This approach provides new insight into subtle aspects of ultrafast relaxation dynamics associated with excitons and charge carriers in the perovskite thin film, which have recently been found to coexist at spatially distinct locations.
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33
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Nakabayashi T, Ohta N. Sensing of intracellular environments by fluorescence lifetime imaging of exogenous fluorophores. ANAL SCI 2016; 31:275-85. [PMID: 25864670 DOI: 10.2116/analsci.31.275] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Fluorescence lifetime imaging (FLIM) has been recognized as a powerful microscopy technique to examine environments in living systems. The fluorescence lifetime does not depend on the photobleaching and optical conditions, which allows us to obtain quantitative information on intracellular environments by analyzing the fluorescence lifetime. A variety of exogenous fluorophores have been applied in FLIM measurements to examine cellular processes. Information on the correlation between the fluorescence lifetime and the physiological parameters is essential to elucidate the cellular environments from the fluorescence lifetime measurements of exogenous fluorophores. In this review, exogenous fluorophores used for lifetime-based sensing are summarized, with the expectation that it becomes a basis for selecting the fluorophore used to investigate the intracellular environment with FLIM. Experimental results of the intracellular sensing of pH, metal ions, oxygen, viscosity, and other physiological parameters on the basis of the FLIM measurements are described along with a brief explanation of the mechanism of the change in the fluorescence lifetime.
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34
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Mao P, Wang Z, Dang W, Weng Y. Multi-channel lock-in amplifier assisted femtosecond time-resolved fluorescence non-collinear optical parametric amplification spectroscopy with efficient rejection of superfluorescence background. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2015; 86:123113. [PMID: 26724012 DOI: 10.1063/1.4938187] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Superfluorescence appears as an intense background in femtosecond time-resolved fluorescence noncollinear optical parametric amplification spectroscopy, which severely interferes the reliable acquisition of the time-resolved fluorescence spectra especially for an optically dilute sample. Superfluorescence originates from the optical amplification of the vacuum quantum noise, which would be inevitably concomitant with the amplified fluorescence photons during the optical parametric amplification process. Here, we report the development of a femtosecond time-resolved fluorescence non-collinear optical parametric amplification spectrometer assisted with a 32-channel lock-in amplifier for efficient rejection of the superfluorescence background. With this spectrometer, the superfluorescence background signal can be significantly reduced to 1/300-1/100 when the seeding fluorescence is modulated. An integrated 32-bundle optical fiber is used as a linear array light receiver connected to 32 photodiodes in one-to-one mode, and the photodiodes are further coupled to a home-built 32-channel synchronous digital lock-in amplifier. As an implementation, time-resolved fluorescence spectra for rhodamine 6G dye in ethanol solution at an optically dilute concentration of 10(-5)M excited at 510 nm with an excitation intensity of 70 nJ/pulse have been successfully recorded, and the detection limit at a pump intensity of 60 μJ/pulse was determined as about 13 photons/pulse. Concentration dependent redshift starting at 30 ps after the excitation in time-resolved fluorescence spectra of this dye has also been observed, which can be attributed to the formation of the excimer at a higher concentration, while the blueshift in the earlier time within 10 ps is attributed to the solvation process.
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Affiliation(s)
- Pengcheng Mao
- Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhuan Wang
- Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Dang
- Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yuxiang Weng
- Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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35
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Poehler E, Pfeiffer SA, Herm M, Gaebler M, Busse B, Nagl S. Microchamber arrays with an integrated long luminescence lifetime pH sensor. Anal Bioanal Chem 2015; 408:2927-35. [DOI: 10.1007/s00216-015-9178-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Revised: 10/27/2015] [Accepted: 11/06/2015] [Indexed: 10/22/2022]
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36
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Yung KY, Zhan Z, Titus AH, Baker GA, Bright FV. Ratiometric, filter-free optical sensor based on a complementary metal oxide semiconductor buried double junction photodiode. Anal Chim Acta 2015; 884:77-82. [PMID: 26073812 DOI: 10.1016/j.aca.2015.05.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/21/2015] [Accepted: 05/11/2015] [Indexed: 10/23/2022]
Abstract
We report a complementary metal oxide semiconductor integrated circuit (CMOS IC) with a buried double junction (BDJ) photodiode that (i) provides a real-time output signal that is related to the intensity ratio at two emission wavelengths and (ii) simultaneously eliminates the need for an optical filter to block Rayleigh scatter. We demonstrate the BDJ platform performance for gaseous NH3 and aqueous pH detection. We also compare the BDJ performance to parallel results obtained by using a slew scanned fluorimeter (SSF). The BDJ results are functionally equivalent to the SSF results without the need for any wavelength filtering or monochromators and the BDJ platform is not prone to errors associated with source intensity fluctuations or sensor signal drift.
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Affiliation(s)
- Ka Yi Yung
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Zhiyong Zhan
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Albert H Titus
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Gary A Baker
- Department of Chemistry, University of Missouri, Columbia, MO 65211-7600, USA
| | - Frank V Bright
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
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37
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Poehler E, Herzog C, Suendermann M, Pfeiffer SA, Nagl S. Development of microscopic time-domain dual lifetime referencing luminescence detection for pH monitoring in microfluidic free-flow isoelectric focusing. Eng Life Sci 2015. [DOI: 10.1002/elsc.201400081] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Elisabeth Poehler
- Institut für Analytische Chemie; Universität Leipzig; Leipzig Germany
| | - Christin Herzog
- Institut für Analytische Chemie; Universität Leipzig; Leipzig Germany
| | | | - Simon A. Pfeiffer
- Institut für Analytische Chemie; Universität Leipzig; Leipzig Germany
| | - Stefan Nagl
- Institut für Analytische Chemie; Universität Leipzig; Leipzig Germany
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38
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Roder P, Hille C. ANG-2 for quantitative Na(+) determination in living cells by time-resolved fluorescence microscopy. Photochem Photobiol Sci 2014; 13:1699-710. [PMID: 25311309 DOI: 10.1039/c4pp00061g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Sodium ions (Na(+)) play an important role in a plethora of cellular processes, which are complex and partly still unexplored. For the investigation of these processes and quantification of intracellular Na(+) concentrations ([Na(+)]i), two-photon coupled fluorescence lifetime imaging microscopy (2P-FLIM) was performed in the salivary glands of the cockroach Periplaneta americana. For this, the novel Na(+)-sensitive fluorescent dye Asante NaTRIUM Green-2 (ANG-2) was evaluated, both in vitro and in situ. In this context, absorption coefficients, fluorescence quantum yields and 2P action cross-sections were determined for the first time. ANG-2 was 2P-excitable over a broad spectral range and displayed fluorescence in the visible spectral range. Although the fluorescence decay behaviour of ANG-2 was triexponential in vitro, its analysis indicates a Na(+)-sensitivity appropriate for recordings in living cells. The Na(+)-sensitivity was reduced in situ, but the biexponential fluorescence decay behaviour could be successfully analysed in terms of quantitative [Na(+)]i recordings. Thus, physiological 2P-FLIM measurements revealed a dopamine-induced [Na(+)]i rise in cockroach salivary gland cells, which was dependent on a Na(+)-K(+)-2Cl(-) cotransporter (NKCC) activity. It was concluded that ANG-2 is a promising new sodium indicator applicable for diverse biological systems.
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Affiliation(s)
- Phillip Roder
- Physical Chemistry/Applied Laser Sensing in Complex Biosystems (ALS ComBi), Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany.
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39
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Lemon CM, Curtin PN, Somers RC, Greytak AB, Lanning RM, Jain RK, Bawendi MG, Nocera DG. Metabolic tumor profiling with pH, oxygen, and glucose chemosensors on a quantum dot scaffold. Inorg Chem 2014; 53:1900-15. [PMID: 24143874 PMCID: PMC3944830 DOI: 10.1021/ic401587r] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Acidity, hypoxia, and glucose levels characterize the tumor microenvironment rendering pH, pO2, and pGlucose, respectively, important indicators of tumor health. To this end, understanding how these parameters change can be a powerful tool for the development of novel and effective therapeutics. We have designed optical chemosensors that feature a quantum dot and an analyte-responsive dye. These noninvasive chemosensors permit pH, oxygen, and glucose to be monitored dynamically within the tumor microenvironment by using multiphoton imaging.
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Affiliation(s)
- Christopher M. Lemon
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA 02138
| | - Peter N. Curtin
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
| | - Rebecca C. Somers
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
| | - Andrew B. Greytak
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208
| | - Ryan M. Lanning
- Edwin L. Steele Laboratory for Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA 02114
| | - Rakesh K. Jain
- Edwin L. Steele Laboratory for Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA 02114
| | - Moungi G. Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
| | - Daniel G. Nocera
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA 02138
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40
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Dekaliuk MO, Viagin O, Malyukin YV, Demchenko AP. Fluorescent carbon nanomaterials: “quantum dots” or nanoclusters? Phys Chem Chem Phys 2014; 16:16075-84. [DOI: 10.1039/c4cp00138a] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Despite many efforts, the mechanisms of light absorption and emission of small fluorescent carbon nanoparticles (C-dots) are still unresolved and are a subject of active discussion.
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Affiliation(s)
- Mariia O. Dekaliuk
- Laboratory of Nanobiotechnology
- Palladin Institute of Biochemistry
- Kyiv 01030, Ukraine
| | - Oleg Viagin
- Institute for Scintillation Materials
- STC “Institute for Single Crystals”
- 61001 Kharkiv, Ukraine
| | - Yuriy V. Malyukin
- Institute for Scintillation Materials
- STC “Institute for Single Crystals”
- 61001 Kharkiv, Ukraine
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41
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Sagolla K, Löhmannsröben HG, Hille C. Time-resolved fluorescence microscopy for quantitative Ca2+ imaging in living cells. Anal Bioanal Chem 2013; 405:8525-37. [DOI: 10.1007/s00216-013-7290-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 07/31/2013] [Accepted: 08/01/2013] [Indexed: 11/28/2022]
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42
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Liu H, Yang H, Hao X, Xu H, Lv Y, Xiao D, Wang H, Tian Z. Development of polymeric nanoprobes with improved lifetime dynamic range and stability for intracellular oxygen sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2639-48. [PMID: 23519925 DOI: 10.1002/smll.201203127] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 01/11/2013] [Indexed: 05/24/2023]
Abstract
A class of core-shell nanoparticles possessing a layer of biocompatible shell and hydrophobic core with embedded oxygen-sensitive platinum-porphyrin (PtTFPP) dyes is developed via a radical-initiated microemulsion co-polymerization strategy. The influences of host matrices and the PtTFPP incorporation manner on the photophysical properties and the oxygen-sensing performance of the nanoparticles are investigated. Self-loading capability with cells and intracellular-oxygen-sensing ability of the as-prepared nanoparticle probes in the range 0%-20% oxygen concentration are confirmed. Polymeric nanoparticles with optimized formats are characterized by their relatively small diameter (<50 nm), core-shell structures with biocompatible shells, covalent-attachment-imparted leak-free construction, improved lifetime dynamic range (up to 44 μs), excellent storage stability and photostability, and facile cell uptake. The nanoparticles' small sensor diameter and core-shell structure with biocompatible shell make them suitable for intracellular detection applications. For intracellular detection applications, the leak-free feature of the as-prepared nanoparticle sensor effectively minimizes potential chemical interferences and cytotoxicity. As a salient feature, improved lifetime dynamic range of the sensor is expected to enable precise oxygen detection and control in specific practical applications in stem-cell biology and medical research. Such a feature-packed nanoparticle oxygen sensor may find applications in precise oxygen-level mapping of living cells and tissue.
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Affiliation(s)
- Heng Liu
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences-UCAS, Beijing 100049, PR China
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43
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Naveenraj S, Anandan S, Velmathi S, Asiri AM, Ashokkumar M. Tuning of chalcogenide nanoparticles fluorescence by Schiff bases. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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von Ketteler A, Herten DP, Petrich W. Fluorescence properties of carba nicotinamide adenine dinucleotide for glucose sensing. Chemphyschem 2012; 13:1302-6. [PMID: 22337358 DOI: 10.1002/cphc.201100921] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 01/16/2012] [Indexed: 11/11/2022]
Abstract
Carba nicotinamide adenine dinucleotide (cNAD) may serve as a stable cofactor for the enzyme-based detection of glucose. Many characteristics of cNAD and its reduced form cNADH resemble those of NAD and NADH, respectively. The fluorescence lifetimes of cNADH are determined to be 0.32(2) ns and 0.66(3) ns compared to 0.28(2) ns and 0.60(3) ns for NADH, and the temperature dependence of these lifetimes hints towards identical processes for quenching. The maximum emission occurs at 464 nm for both cNADH and NADH and absorbance maxima are found at 360 nm and 340 nm, respectively. In contrast to previous suggestions the respective maximum extinction coefficient of cNADH equals that of NADH and amounts to 6.2(2) mM(-1) cm(-1). When changing from NADH to cNADH we observe a ~50% increase in quantum efficiency, which--together with the larger excitation wavelength and the higher stability--should make cNAD a well suited alternative as coenzyme for robust glucose detection.
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Affiliation(s)
- Alexa von Ketteler
- Kirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69210 Heidelberg, Germany.
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Fudala R, Mummert ME, Gryczynski Z, Rich R, Borejdo J, Gryczynski I. Lifetime-based sensing of the hyaluronidase using fluorescein labeled hyaluronic acid. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2012; 106:69-73. [PMID: 22082776 PMCID: PMC3242895 DOI: 10.1016/j.jphotobiol.2011.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 10/10/2011] [Accepted: 10/12/2011] [Indexed: 11/17/2022]
Abstract
In this report we propose a lifetime-based sensing (LBS) for the detection of hyaluronidase (HA-ase). First, we heavily label hyaluronan macromolecules (HAs) with fluorescein amine. The fluorescein labeled HA (HA-Fl) has a weak fluorescence and short fluorescence lifetime due to an efficient self-quenching. Upon the addition of HA-ase, the brightness and lifetime of the sample increase. The cleavage of an HA macromolecule reduces the energy migration between fluorescein molecules and the degree of the self-quenching. A first order of the cleavage reaction depends on the amount of the HA-ase enzyme. We describe an HA-ase sensing strategy based on the lifetime changes of the fluorescein labeled HA in the presence of HA-ase. We demonstrate that the calibration of the sensing response is the same for the average lifetime as for a single exponential decay approximation, which significantly simplifies the analysis of the sensing measurements.
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Affiliation(s)
- Rafal Fudala
- Department of Molecular Biology and Immunology, Center for Commercialization of Fluorescence Technologies, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
- Department of Microbiology, Institute of Biology, The Jan Kochanowski University in Kielce, Kielce, Poland
| | - Mark E. Mummert
- Department of Psychiatry and Behavioral Health, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
| | - Zygmunt Gryczynski
- Department of Molecular Biology and Immunology, Center for Commercialization of Fluorescence Technologies, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
- Department of Physics & Astronomy, Texas Christian University, Fort Worth, Texas 76129, USA
| | - Ryan Rich
- Department of Molecular Biology and Immunology, Center for Commercialization of Fluorescence Technologies, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
| | - Julian Borejdo
- Department of Molecular Biology and Immunology, Center for Commercialization of Fluorescence Technologies, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
| | - Ignacy Gryczynski
- Department of Molecular Biology and Immunology, Center for Commercialization of Fluorescence Technologies, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
- Department of Cell Biology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
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Bergen A, Bohne C, Fuentealba D, Ihmels H, Pace TCS, Waidelich M, Yihwa C, Willem Bats J. Studies of the solvatochromic emission properties of N-aroylurea derivatives I: Influence of the substitution pattern. Photochem Photobiol Sci 2012; 11:752-67. [DOI: 10.1039/c2pp05386a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Yarnell JE, Deaton JC, McCusker CE, Castellano FN. Bidirectional “Ping-Pong” Energy Transfer and 3000-Fold Lifetime Enhancement in a Re(I) Charge Transfer Complex. Inorg Chem 2011; 50:7820-30. [DOI: 10.1021/ic200974h] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James E. Yarnell
- Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Joseph C. Deaton
- Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Catherine E. McCusker
- Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Felix N. Castellano
- Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
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48
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Esposito R, Ventura BD, De Nicola S, Altucci C, Velotta R, Mita DG, Lepore M. Glucose sensing by time-resolved fluorescence of sol-gel immobilized glucose oxidase. SENSORS (BASEL, SWITZERLAND) 2011; 11:3483-97. [PMID: 22163807 PMCID: PMC3231312 DOI: 10.3390/s110403483] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 03/14/2011] [Accepted: 03/16/2011] [Indexed: 11/17/2022]
Abstract
A monolithic silica gel matrix with entrapped glucose oxidase (GOD) was constructed as a bioactive element in an optical biosensor for glucose determination. Intrinsic fluorescence of free and immobilised GOD was investigated in the visible range in presence of different glucose concentrations by time-resolved spectroscopy with time-correlated single-photon counting detector. A three-exponential model was used for analysing the fluorescence transients. Fractional intensities and mean lifetime were shown to be sensitive to the enzymatic reaction and were used for obtaining calibration curve for glucose concentration determination. The sensing system proposed achieved high resolution (up to 0.17 mM) glucose determination with a detection range from 0.4 mM to 5 mM.
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Affiliation(s)
- Rosario Esposito
- CNISM-Dipartimento Scienze Fisiche, Università di Napoli Federico II, Napoli 80126, Italy; E-Mails: (C.A.); (R.V.)
| | - Bartolomeo Della Ventura
- Dipartimento di Medicina Sperimentale, Seconda Università di Napoli, Napoli 80138, Italy; E-Mails: (B.D.V.); (D.G.M.); (M.L.)
| | - Sergio De Nicola
- Istituto Nazionale di Ottica, CNR, compr. A. Olivetti, Via Campi Flegrei 34, Pozzuoli 80078, Italy; E-Mail:
| | - Carlo Altucci
- CNISM-Dipartimento Scienze Fisiche, Università di Napoli Federico II, Napoli 80126, Italy; E-Mails: (C.A.); (R.V.)
| | - Raffaele Velotta
- CNISM-Dipartimento Scienze Fisiche, Università di Napoli Federico II, Napoli 80126, Italy; E-Mails: (C.A.); (R.V.)
| | - Damiano Gustavo Mita
- Dipartimento di Medicina Sperimentale, Seconda Università di Napoli, Napoli 80138, Italy; E-Mails: (B.D.V.); (D.G.M.); (M.L.)
- Institute of Genetics and Biophysics, CNR, Naples 80131, Italy
| | - Maria Lepore
- Dipartimento di Medicina Sperimentale, Seconda Università di Napoli, Napoli 80138, Italy; E-Mails: (B.D.V.); (D.G.M.); (M.L.)
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Sen R, Koner S, Bhattacharjee A, Kusz J, Miyashita Y, Okamoto KI. Entrapment of [Ru(bpy)3]2+ in the anionic metal–organic framework: Novel photoluminescence behavior exhibiting dual emission at room temperature. Dalton Trans 2011; 40:6952-60. [DOI: 10.1039/c0dt01647k] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Turel M, Duerkop A, Yegorova A, Karasyov A, Scripinets Y, Lobnik A. Microtiterplate phosphate assay based on luminescence quenching of a terbium complex amenable to decay time detection. Anal Chim Acta 2010; 675:42-8. [DOI: 10.1016/j.aca.2010.06.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Revised: 06/14/2010] [Accepted: 06/28/2010] [Indexed: 10/19/2022]
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