1
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Jain A, De S, Mukherjee D, Haribabu J, Santibanez JF, Barman P. A substituent-modified new salicylaldehyde-diphenyl-azine based AIEgen: A promising skeleton for copper ion sensor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124824. [PMID: 39029203 DOI: 10.1016/j.saa.2024.124824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 07/09/2024] [Accepted: 07/13/2024] [Indexed: 07/21/2024]
Abstract
In this study, we have reported a novel 4-bromo-salicylaldehyde-diphenyl-azine (B-1), a new member of salicylaldehyde-diphenyl-azine (SDPA) family known for its excellent sensing properties. In contrast to the previously reported AIEgens, we found that the bromo-substitution at the 4th position of the salicylaldehyde moiety blue-shifted the emission by 10 and 15 nm as compared to the unsubstituted (Tong et.al 2017) and Bromo at the 5th position (Jain et.al 2023) respectively. Moreover, B-1 crystallizes instantly as the cooling process starts, which was not observed in the previously reported scaffolds. The sensing investigation again demonstrated the precise and ultrasensitive behavior of B-1 for copper ions. B-1 has a very low LOD value i.e. 29.2 x 10-8 M with a high association constant and binds with copper ion in 2:1 mode. This time we also analyzed the practical applicability in the solid phase using cotton swabs and performed the real-time estimation of copper ions in water and biological samples like urine and blood serum. The excellent percentage recovery and the RSD value suggest the precision of the experiments. Further, we also perform the sensing in living cancer HeLa cells. Altogether, we found that the SDPA skeleton is precise and ultrasensitive for copper ions and versatile which can be used variously to detect copper ions in the real world. This research will surely help in developing new specific skeleton-based AIEgens with desirable emission properties and precise applications in the future.
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Affiliation(s)
- Abhinav Jain
- Department of Chemistry, National Institute of Technology, Silchar, Assam 788010, India
| | - Soumik De
- Department of Chemistry, National Institute of Technology, Silchar, Assam 788010, India
| | - Debanggana Mukherjee
- Department of Chemistry, National Institute of Technology, Silchar, Assam 788010, India
| | - Jebiti Haribabu
- Facultad de Medicina, Universidad de Atacama, Los Carreras 1579, 1532502 Copiapo, Chile; Chennai Institute of Technology (CIT), Chennai 600069, India
| | - Juan F Santibanez
- Institute for Medical Research, National Institute of the Republic of Serbia, University of Belgrade, Belgrade 11029, Serbia; Integrative Center for Biology and Applied Chemistry (CIBQA), Bernardo O'Higgins University, Santiago 8370993, Chile
| | - Pranjit Barman
- Department of Chemistry, National Institute of Technology, Silchar, Assam 788010, India.
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2
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Bátora D, Fischer J, Kaderli RM, Varga M, Lochner M, Gertsch J. Silicon-Rhodamine Functionalized Evocalcet Probes Potently and Selectively Label Calcium Sensing Receptors In Vitro, In Vivo, and Ex Vivo. ACS Pharmacol Transl Sci 2024; 7:1557-1570. [PMID: 38751613 PMCID: PMC11091967 DOI: 10.1021/acsptsci.4c00096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 05/18/2024]
Abstract
The calcium sensing receptor (CaSR) is a ubiquitously expressed G-protein coupled receptor (GPCR) that regulates extracellular calcium signals via the parathyroid glands. CaSR has recently also been implicated in noncalcitropic pathophysiologies like asthma, gut inflammation, and cancer. To date, molecular tools that enable the bioimaging of CaSR in tissues are lacking. Based on in silico analyses of available structure-activity relationship data on CaSR ligands, we designed and prepared silicon-rhodamine (SiR) conjugates of the clinically approved drug evocalcet. The new probes EvoSiR4 and EvoSiR6, with differing linker lengths at the evocalcet carboxyl end, both showed a 6-fold and 3-fold increase in potency toward CaSR (EC50 < 45 nM) compared to evocalcet and the evocalcet-linker conjugate, respectively, in an FLIPR-based cellular functional assay. The specificity of the EvoSiR probes toward CaSR binding and the impact of albumin was evaluated in live cell experiments. Both probes showed strong albumin binding, which facilitated the clearance of nonspecific binding interactions. Accordingly, in zebrafish embryos, EvoSiR4 specifically labeled the high CaSR expressing neuromasts of the lateral line in vivo. EvoSiR4 was also assessed in human parathyroid tissues ex vivo, showing a specific absolute CaSR-associated fluorescence compared to that of parathyroid autofluorescence. In summary, functionalization of evocalcet by SiR led to the preparation of potent and specific fluorescent CaSR probes. EvoSiR4 is a versatile small-molecular probe that can be employed in CaSR-related biomedical analyses where antibodies are not applicable.
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Affiliation(s)
- Daniel Bátora
- Institute
of Biochemistry and Molecular Medicine, University of Bern, 3012 Bern, Switzerland
- Graduate
School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Jérôme
P. Fischer
- Institute
of Biochemistry and Molecular Medicine, University of Bern, 3012 Bern, Switzerland
| | - Reto M. Kaderli
- Department
of Visceral Surgery and Medicine, Inselspital,
Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Máté Varga
- Department
of Genetics, ELTE Eötvös Loránd
University, 1117 Budapest, Hungary
| | - Martin Lochner
- Institute
of Biochemistry and Molecular Medicine, University of Bern, 3012 Bern, Switzerland
| | - Jürg Gertsch
- Institute
of Biochemistry and Molecular Medicine, University of Bern, 3012 Bern, Switzerland
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3
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Trang TT, Pham TTH, Dang NV, Nga PT, Linh MV, Vu XH. Revealing the high efficiency of fluorescence quenching of rhodamine B by triangular silver nanodisks due to the inner filter effect mechanism. RSC Adv 2024; 14:9538-9546. [PMID: 38516156 PMCID: PMC10955385 DOI: 10.1039/d4ra00575a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 02/28/2024] [Indexed: 03/23/2024] Open
Abstract
Performing effective fluorescence quenching based on a metal nanomaterial is essential to construct fluorescence sensors. Silver nanomaterials are well known as an excellent candidate for an absorber in fluorescence sensing systems. Herein, we investigated the fluorescence quenching of rhodamine B (RhB) in the presence of triangular silver nanodisks in which perfect overlap between the absorption of the absorber and the fluorescence of the fluorophore was observed. The fluorescence quenching mechanism of RhB was investigated under various excitation wavelengths, together with measurement of the fluorescence lifetime. The quenching efficiency of RhB was proportional to the wavelength excitation. Remarkably, the highest efficiency of fluorescence quenching of RhB was achieved (∼60%). The quenching mechanism was investigated and revealed to be mostly due to the inner filter effect (IFE) mechanism, without the contribution of energy transfer. This result shows a completely different story from most previous studies based on silver nanoparticles, where energy transfer was reported to play a significant role.
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Affiliation(s)
- Tran Thu Trang
- Institute of Science and Technology, TNU-University of Sciences Tan Thinh Ward Thai Nguyen City Vietnam
| | - Thi Thu Ha Pham
- Faculty of Chemistry, TNU-University of Sciences Tan Thinh Ward Thai Nguyen City Vietnam
| | - Nguyen Van Dang
- Institute of Science and Technology, TNU-University of Sciences Tan Thinh Ward Thai Nguyen City Vietnam
| | - Pham Thi Nga
- Institute of Science and Technology, TNU-University of Sciences Tan Thinh Ward Thai Nguyen City Vietnam
- Faculty of Secondary School, Hoa Lu University 2 Xuan Thanh Street, Ninh Nhat Commune Ninh Binh City Vietnam
| | - Mac Van Linh
- Institute of Science and Technology, TNU-University of Sciences Tan Thinh Ward Thai Nguyen City Vietnam
- Quang Uyen High School Quang Hoa District Cao Bang Province Vietnam
| | - Xuan Hoa Vu
- Institute of Science and Technology, TNU-University of Sciences Tan Thinh Ward Thai Nguyen City Vietnam
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4
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Boudebs G, Zinoune JB, Cassagne C, Chis M. Thermal lens Z-scan measurements: theoretical and experimental uncertainties for low and high fluorescence quantum yields. APPLIED OPTICS 2023; 62:7669-7677. [PMID: 37855474 DOI: 10.1364/ao.500526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/15/2023] [Indexed: 10/20/2023]
Abstract
The single-beam Z-scan thermal lens technique is conducted to evaluate the fluorescence quantum yield of various solutions in the case of high-moderate absorption, considering both scenarios: solutions with substantial fluorescence and solutions with high thermal efficiency but low fluorescence. An analytical calculation is performed to determine the uncertainties associated with the random errors introduced by optical detectors. The results reveal that solutions with low fluorescence lead to a significant error, whereas higher fluorescence can help in decreasing the uncertainty. Additionally, the issue of random errors arising when multiple measurements are needed to accurately estimate the fluorescence of a solution will be discussed in different situations.
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5
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Adams SR, Mackey MR, Ramachandra R, Deerinck TJ, Castillon GA, Phan S, Hu J, Boassa D, Ngo JT, Ellisman MH. Fe-TAMLs as a new class of small molecule peroxidase probes for correlated light and electron microscopy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.25.554352. [PMID: 37662194 PMCID: PMC10473768 DOI: 10.1101/2023.08.25.554352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
We introduce Fe-TAML, a small molecule-based peroxidase as a versatile new member of the correlated fluorescence and electron microscopy toolkit. The utility of the probe is demonstrated by high resolution imaging of newly synthesized DNA (through biorthogonal labeling), genetically tagged proteins (using HaloTag), and untagged endogenous proteins (via immunostaining). EM visualization in these applications is facilitated by exploiting Fe-TAML's catalytic activity for the deposition of localized osmiophilic precipitates based on polymerized 3,3'-diaminobenzidine. Optimized conditions for synthesizing and implementing Fe-TAML based probes are also described. Overall, Fe-TAML is a new chemical biology tool that can be used to visualize diverse biomolecular species along nanometer and micron scales within cells.
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De Santis J, Paolucci V, Stagi L, Carboni D, Malfatti L, Cantalini C, Innocenzi P. Bidimensional SnSe 2-Mesoporous Ordered Titania Heterostructures for Photocatalytically Activated Anti-Fingerprint Optically Transparent Layers. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1406. [PMID: 37110990 PMCID: PMC10143690 DOI: 10.3390/nano13081406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/14/2023] [Accepted: 04/17/2023] [Indexed: 06/19/2023]
Abstract
The design of functional coatings for touchscreens and haptic interfaces is of paramount importance for smartphones, tablets, and computers. Among the functional properties, the ability to suppress or eliminate fingerprints from specific surfaces is one of the most critical. We produced photoactivated anti-fingerprint coatings by embedding 2D-SnSe2 nanoflakes in ordered mesoporous titania thin films. The SnSe2 nanostructures were produced by solvent-assisted sonication employing 1-Methyl-2-pyrrolidinone. The combination of SnSe2 and nanocrystalline anatase titania enables the formation of photoactivated heterostructures with an enhanced ability to remove fingerprints from their surface. These results were achieved through careful design of the heterostructure and controlled processing of the films by liquid phase deposition. The self-assembly process is unaffected by the addition of SnSe2, and the titania mesoporous films keep their three-dimensional pore organization. The coating layers show high optical transparency and a homogeneous distribution of SnSe2 within the matrix. An evaluation of photocatalytic activity was performed by observing the degradation of stearic acid and Rhodamine B layers deposited on the photoactive films as a function of radiation exposure time. FTIR and UV-Vis spectroscopies were used for the photodegradation tests. Additionally, infrared imaging was employed to assess the anti-fingerprinting property. The photodegradation process, following pseudo-first-order kinetics, shows a tremendous improvement over bare mesoporous titania films. Furthermore, exposure of the films to sunlight and UV light completely removes the fingerprints, opening the route to several self-cleaning applications.
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Affiliation(s)
- Jessica De Santis
- Department of Industrial and Information Engineering and Economics, 67100 L’Aquila, Italy; (J.D.S.); (V.P.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy; (D.C.); (L.M.)
| | - Valentina Paolucci
- Department of Industrial and Information Engineering and Economics, 67100 L’Aquila, Italy; (J.D.S.); (V.P.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy; (D.C.); (L.M.)
| | - Luigi Stagi
- Laboratory of Materials Science and Nanotechnology (LMNT), Department of Biomedical Sciences, CR-INSTM, University of Sassari, 07100 Sassari, Italy;
| | - Davide Carboni
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy; (D.C.); (L.M.)
- Laboratory of Materials Science and Nanotechnology (LMNT), Department of Biomedical Sciences, CR-INSTM, University of Sassari, 07100 Sassari, Italy;
| | - Luca Malfatti
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy; (D.C.); (L.M.)
- Laboratory of Materials Science and Nanotechnology (LMNT), Department of Biomedical Sciences, CR-INSTM, University of Sassari, 07100 Sassari, Italy;
| | - Carlo Cantalini
- Department of Industrial and Information Engineering and Economics, 67100 L’Aquila, Italy; (J.D.S.); (V.P.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy; (D.C.); (L.M.)
| | - Plinio Innocenzi
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy; (D.C.); (L.M.)
- Laboratory of Materials Science and Nanotechnology (LMNT), Department of Biomedical Sciences, CR-INSTM, University of Sassari, 07100 Sassari, Italy;
- Department of Chemistry, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates
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7
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Mazumder A, Mozammal M, Talukder MA. Three-dimensional imaging of biological cells using surface plasmon coupled emission. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:106002. [PMID: 36203237 PMCID: PMC9535299 DOI: 10.1117/1.jbo.27.10.106002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
SIGNIFICANCE Biological cell imaging has become one of the most crucial research interests because of its applications in biomedical and microbiology studies. However, three-dimensional (3D) imaging of biological cells is critically challenging and often involves prohibitively expensive and complex equipment. Therefore, a low-cost imaging technique with a simpler optical arrangement is immensely needed. AIM The proposed approach will provide an accurate cell image at a low cost without needing any microscope or extensive processing of the collected data, often used in conventional imaging techniques. APPROACH We propose that patterns of surface plasmon coupled emission (SPCE) features from a fluorescently labeled biological cell can be used to image the cell. An imaging methodology has been developed and theoretically demonstrated to create 3D images of cells from the detected SPCE patterns. The 3D images created from the different SPCE properties at the far-field closely match the actual cell structures. RESULTS The developed technique has been applied to different regular and irregular cell shapes. In each case, the calculated root-mean-square error (RMSE) of the created images from the cell structures remains within a few percentages. Our work recreates the base of a circular-shaped cell with an RMSE of ≲1.4 % . In addition, the images of irregular-shaped cell bases have an RMSE of ≲2.8 % . Finally, we obtained a 3D image with an RMSE of ≲6.5 % for a random cellular structure. CONCLUSIONS Despite being in its initial stage of development, the proposed technique shows promising results considering its simplicity and the nominal cost it would require.
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Affiliation(s)
- Anik Mazumder
- Bangladesh University of Engineering and Technology, Department of Electrical and Electronic Engineering, Dhaka, Bangladesh
- United International University, Department of Computer Science and Engineering, Dhaka, Bangladesh
| | - Mohammad Mozammal
- Bangladesh University of Engineering and Technology, Department of Electrical and Electronic Engineering, Dhaka, Bangladesh
| | - Muhammad Anisuzzaman Talukder
- Bangladesh University of Engineering and Technology, Department of Electrical and Electronic Engineering, Dhaka, Bangladesh
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8
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Stratton BFC, Pierre AJ, Riser EA, Grinalds NJ, Edwards CW, Wohlwend AM, Bauer JS, Spera RJ, Pferdmenges LS, Griffith KM, Hunter BW, Bobadova-Parvanova P, Day CS, Lundin PM, Fogarty KH. Synthesis and Optical Characterization of a Rhodamine B Spirolactam Dimer. J Phys Chem A 2022; 126:4211-4220. [PMID: 35749658 DOI: 10.1021/acs.jpca.2c02665] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Amide derivatives of xanthene dyes such as rhodamine B are useful in a variety of sensing applications due to their colorimetric responses to stimuli such as acidity changes and UV light. The optical properties of these molecules can be influenced by intermolecular associations into dimeric structures, but the exact impact can be hard to predict. We have designed a covalently linked intramolecular dimer of the dye rhodamine B utilizing p-phenylenediamine to link the two dyes via amide bonds. The doubly closed spirolactam version of this dimer, RSL2, is isolated as a colorless solid. Under acidic conditions or UV exposure, RSL2 solutions develop a pink color that is expected for the ring-opened form of the molecule. However, nuclear magnetic resonance (NMR) and single-crystal diffraction data show that the equilibrium still prefers the closed dimer state. Interestingly, the emission profile of RSL2 shows solvatochromic blue fluorescence. Control studies of model compounds with similar structural motifs do not display similar blue fluorescence, indicating that this optical behavior is unique to the dimeric form. This behavior may lend itself to applications of such xanthene dimers to more sophisticated sensors beyond those with traditional binary on/off fluorescence profiles.
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Affiliation(s)
- Brandy-Fey C Stratton
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Angelina J Pierre
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Elizabeth A Riser
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Nathan J Grinalds
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Charles W Edwards
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Anna M Wohlwend
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Jacob S Bauer
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Rachel J Spera
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Lauren S Pferdmenges
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Kaitlyn M Griffith
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Brandon W Hunter
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Petia Bobadova-Parvanova
- Department of Chemistry and Fermentation Sciences, Appalachian State University, Boone, North Carolina 28608, United States
| | - Cynthia S Day
- Department of Chemistry, Wake Forest University, Winston Salem, North Carolina 27109, United States
| | - Pamela M Lundin
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Keir H Fogarty
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
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9
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Letuta SN, Ishemgulov AT, Nikiyan AN, Razdobreev DA, Galaktionova LV, Dorofeev DV, Tsurko DE. Mechanisms of Damage in Salmonella typhimurium and Staphylococcus aereus upon Pulse Photoexcitation of Molecular Sensitizers. Biophysics (Nagoya-shi) 2022. [DOI: 10.1134/s0006350922030137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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10
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Peng M, Kaczmarek AM, Van Hecke K. Ratiometric Thermometers Based on Rhodamine B and Fluorescein Dye-Incorporated (Nano) Cyclodextrin Metal-Organic Frameworks. ACS APPLIED MATERIALS & INTERFACES 2022; 14:14367-14379. [PMID: 35312274 DOI: 10.1021/acsami.2c01332] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Macro- and nanosized core, as well as core-shell, γ-cyclodextrin metal-organic frameworks (γ-CD-MOFs) have been designed and used as platforms for the encapsulation of dye molecules to develop the first CD-MOF-based ratiometric optical thermometer materials. A novel dye combination was employed for this purpose, i.e., the duo rhodamine B (RhB) and fluorescein (FL). RhB is highly temperature-sensitive, whereas FL is less temperature-sensitive, and its luminescence emission peak is used as a reference. Promising results in terms of thermometric properties were obtained for a series of dye-encapsulated γ-CD-MOF materials based on this dye combination, with high relative sensitivities, even up to 5%K-1, for the dye-encapsulated 75%RhB-25%FL nanosized γ-CD-MOF, among the highest performance values reported so far for luminescent dual thermometers. In our study, we have additionally developed a simple yet effective preparation method for core-shell γ-CD-MOFs, allowing effective manipulation of the γ-CD-MOF shell growth. The proposed method allows incorporation of the FL and RhB dyes in the γ-CD-MOFs in a more controlled manner, enhancing the efficiency of the developed ratiometric (macro) γ-CD-MOF thermometers.
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Affiliation(s)
- Min Peng
- XStruct, Department of Chemistry, Ghent University, Krijgslaan 281-S3, Ghent 9000, Belgium
| | - Anna M Kaczmarek
- NanoSensing Group, Department of Chemistry, Ghent University, Krijgslaan 281-S3, Ghent 9000, Belgium
| | - Kristof Van Hecke
- XStruct, Department of Chemistry, Ghent University, Krijgslaan 281-S3, Ghent 9000, Belgium
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Lashanizadegan M, Mirzazadeh H, Ahmadi M. Fe-Mn-Si-O and Fe-Mn-Si-O/multi walled carbon nanotubes: synthesis, characteristics, adsorption and catalytic behavior. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2021.2025079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Maryam Lashanizadegan
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Tehran, Iran
| | - Hoda Mirzazadeh
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Tehran, Iran
| | - Maryam Ahmadi
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Tehran, Iran
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12
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Schröder N, Schmidtmann M, Christoffers J. Diaminoterephthalate‐EDTA and ‐EGTA Conjugates – “Turn on” Fluorescence Sensors for Zinc Ions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Nils Schröder
- Institut für Chemie Carl von Ossietzky Universität Oldenburg 26111 Oldenburg Germany
| | - Marc Schmidtmann
- Institut für Chemie Carl von Ossietzky Universität Oldenburg 26111 Oldenburg Germany
| | - Jens Christoffers
- Institut für Chemie Carl von Ossietzky Universität Oldenburg 26111 Oldenburg Germany
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13
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Gaur P, Galkin M, Kurochka A, Ghosh S, Yushchenko DA, Shvadchak VV. Fluorescent Probe for Selective Imaging of α-Synuclein Fibrils in Living Cells. ACS Chem Neurosci 2021; 12:1293-1298. [PMID: 33819025 DOI: 10.1021/acschemneuro.1c00090] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Plaques of amyloid fibrils composed of neuronal protein α-synuclein are one of the hallmarks of Parkinson's disease, and their selective imaging is crucial to study the mechanism of its pathogenesis. However, the existing fluorescent probes for amyloids are efficient only in solution and tissue systems, and they are not selective enough for the visualization of amyloid fibrils in living cells. In this study, we present two molecular rotor-based probes RB1 and RB2. These thiazolium probes show affinity to α-synuclein fibrils and turn-on fluorescence response upon interactions. Because of its extended π-conjugation and high rotational degree of freedom, RB1 exhibits a 76 nm red-shift of absorption maxima and 112-fold fluorescence enhancement upon binding to amyloid fibrils. Owing to its strong binding affinity to α-synuclein fibrils, RB1 can selectively stain them in the cytoplasm of living HeLa and SH-SY5Y cells with high optical contrast. RB1 is a cell-permeable and noncytotoxic probe. Taken together, we have demonstrated that RB1 is an amyloid probe with an outstanding absorption red-shift that can be used for intracellular imaging of α-synuclein fibrils.
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Affiliation(s)
- Pankaj Gaur
- Laboratory of Chemical Biology, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo namesti 2, Prague 6, 16610, Czech Republic
| | - Maksym Galkin
- Laboratory of Chemical Biology, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo namesti 2, Prague 6, 16610, Czech Republic
- Department of Biochemistry, Faculty of Science, Charles University, Albertov 6, Prague, 12843, Czech Republic
| | - Andrii Kurochka
- Laboratory of Chemical Biology, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo namesti 2, Prague 6, 16610, Czech Republic
| | - Subrata Ghosh
- School of Basic Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
| | - Dmytro A. Yushchenko
- Laboratory of Chemical Biology, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo namesti 2, Prague 6, 16610, Czech Republic
| | - Volodymyr V. Shvadchak
- Laboratory of Chemical Biology, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo namesti 2, Prague 6, 16610, Czech Republic
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14
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Feng Y, Liu W, Mercadé-Prieto R, Chen XD. Dye-protein interactions between Rhodamine B and whey proteins that affect the photoproperties of the dye. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.113092] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Farat OK, Ananyev IV, Tatarets AL, Varenichenko SA, Zaliznaya EV, Markov VI. Influence of the amidine fragment on spectral properties of xanthene dyes. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129191] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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16
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Ramakrishnan V, Nabetani Y, Yamamoto D, Tachibana H, Inoue H. Heat trapping in a nano-layered microenvironment: estimation of temperature by thermal sensing molecules. Phys Chem Chem Phys 2020; 22:7201-7209. [PMID: 32141449 DOI: 10.1039/c9cp05817f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have previously found reversible photo-induced expansion and contraction of organic/inorganic clay hybrids, and even sliding of niobate nano-sheets at the macroscopic level of organic/inorganic niobate hybrids, induced by the molecular photo-isomerization of the polyfluoroalkylated azobenzene derivative (C3F-Azo-C6H) intercalated within the interlayer, which is viewed as an artificial muscle model unit. Based on systematic investigations of the steady state photo-isomerization and transient behavior of the reaction, we comprehended that the phenomena is caused by trapping of excess energy liberated during the isomerization, as well as the relaxation processes upon excitation of azobenzene chromophores in the interlayers of the hybrid. In this paper, quantitative estimation of transient 'heat' trapped in various microenvironments has been studied by each co-intercalation of temperature sensing dye molecules - rhodamine B (RhB) or tris(bipyridine)ruthenium(ii) chloride (Rubpy) with C3F-Azo-C6H within clay (SSA) nano-layers. The amount of dye molecules co-intercalated was kept to trace amounts that did not alter the bi-layered structure of the hybrid. The temperature of the microenvironment surrounding the probe molecules was estimated from the emission lifetime analysis. The evidently reduced emission lifetimes in C3F-Azo-C6H/SSA and C3H-Azo-C6H/SSA hybrids in the film state, indicated the elevation of temperature of the microenvironment upon excitation of the chromophores, which demonstrated our previous hypothesis rationalizing that the high reactivity of isomerization in the hybrid film state is caused by heat trapping via multi-step dissipation of the excess energy. With the hybrid of a hydrocarbon analogue (C3H-Azo-C6H), a distinct difference in temperature gradient was found to show the crucial role of the perfluoroalkyl chain of the surfactant that traps the excess energy to retard its dissipation leading to three-dimensional morphological motion.
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Affiliation(s)
- Vivek Ramakrishnan
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1, Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan.
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Mamontova E, Daurat M, Long J, Godefroy A, Salles F, Guari Y, Gary-Bobo M, Larionova J. Fashioning Prussian Blue Nanoparticles by Adsorption of Luminophores: Synthesis, Properties, and in Vitro Imaging. Inorg Chem 2020; 59:4567-4575. [PMID: 32149510 DOI: 10.1021/acs.inorgchem.9b03699] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We report the postsynthetic functionalization of Prussian blue (PB) nanoparticles by two different luminophores (2-aminoanthracene and rhodamine B). We show that the photoluminescence properties of the fluorophores are modified by a confinement effect upon adsorption and demonstrate that such multifunctional nanosized systems could be used for in vitro imaging.
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Affiliation(s)
- Ekaterina Mamontova
- UMR 5253, Equipe Ingénierie Moléculaire et Nano-Objets, Université de Montpellier, ENSCM, CNRS, Institut Charles Gerhardt, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | - Morgane Daurat
- Institut des Biomolécules Max Mousseron, UMR5247, CNRS, ENSCM, Faculté de Pharmacie, Université de Montpellier, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 05, France.,NanoMedSyn, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Jérôme Long
- UMR 5253, Equipe Ingénierie Moléculaire et Nano-Objets, Université de Montpellier, ENSCM, CNRS, Institut Charles Gerhardt, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | - Anastasia Godefroy
- Institut des Biomolécules Max Mousseron, UMR5247, CNRS, ENSCM, Faculté de Pharmacie, Université de Montpellier, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 05, France.,NanoMedSyn, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Fabrice Salles
- UMR 5253, Equipe Agrégats, Interfaces et Matériaux pour l'Energie ENSCM/CNRS/UM, Institut Charles Gerhardt Montpellier, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | - Yannick Guari
- UMR 5253, Equipe Ingénierie Moléculaire et Nano-Objets, Université de Montpellier, ENSCM, CNRS, Institut Charles Gerhardt, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | - Magali Gary-Bobo
- Institut des Biomolécules Max Mousseron, UMR5247, CNRS, ENSCM, Faculté de Pharmacie, Université de Montpellier, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 05, France
| | - Joulia Larionova
- UMR 5253, Equipe Ingénierie Moléculaire et Nano-Objets, Université de Montpellier, ENSCM, CNRS, Institut Charles Gerhardt, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
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Belikov MY, Ievlev MY, Fedoseev SV, Ershov OV. The first example of “turn-off” red fluorescence photoswitching for the representatives of nitrile-rich negative photochromes. NEW J CHEM 2020. [DOI: 10.1039/d0nj00718h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The first example of reversible fluorescence photoswitching by visible light was shown for the representatives of negative photochromes containing a nitrile-rich acceptor.
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Rubio V, Iragavarapu V, Stawikowski MJ. Synthesis and Characterization of ROSA Dye - A Rhodamine B-type Fluorophore, Suitable for Bioconjugation and Fluorescence Studies in Live Cells. Protein Pept Lett 2019; 26:758-767. [PMID: 31215362 DOI: 10.2174/0929866526666190619110430] [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: 11/29/2018] [Revised: 04/02/2019] [Accepted: 04/25/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Herein we report the multigram-scale synthesis, characterization and application of a rhodamine B-based fluorophore (ROSA) suitable for fluorescent studies in biological applications. This fluorophore is devoid of rhodamine spirolactone formation and furthermore characterized by a high molar extinction coefficient (ϵ=87250 ± 1630 M-1cm-1) and quantum yield (φ) of 0.589 ± 0.070 in water. Reported here is also the application of ROSA towards synthesis of a ROSA-PEG-GRGDS-NH2 fluorescent probe suitable for live cell imaging of αvβ3 integrins for in vitro assays. OBJECTIVES The main objective of this study is to efficiently prepare rhodamine B derivative, devoid of spirolactone formation that would be suitable for bioconjugation and subsequent bioimaging. METHODS Rhodamine B was transformed into rhodamine B succinimide ester (RhoB-OSu) using N-hydroxysuccinimide. RhoB-OSu was further coupled to sarcosine to obtain rhodamine Bsarcosine dye (ROSA) in good yield. The ROSA dye was then coupled to a αvβ3 integrin binding sequence using standard solid-phase conditions. Resulting ROSA-PEG-GRGDS-NH2 probe was used to image integrins on cancer cells. RESULTS The rhodamine B-sarcosine dye (ROSA) was obtained in multigram scale in good total yield of 47%. Unlike rhodamine B, the ROSA dye does not undergo pH-dependent spirolactone/spirolactam formation as compared with rhodamine B-glycine. It is also characterized by excellent quantum yield (φ) of 0.589 ± 0.070 in water and high molar extinction coefficient of 87250 ± 1630 M-1cm-1. ROSA coupling to the RGD-like peptide was proved to be efficient and straightforward. Imaging using standard filters on multimode plate reader and confocal microscope was performed. The αvβ3 integrins present on the surface of live WM-266-4 (melanoma) and MCF- 7 (breast cancer) cells were successfully imaged. CONCLUSION We successfully derivatized rhodamine B to create an inexpensive, stable and convenient to use fluorescent probe. The obtained derivative has excellent photochemical properties and it is suitable for bioconjugation and many imaging applications.
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Affiliation(s)
- Vicente Rubio
- Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science, Florida Atlantic University, 777 Glades Rd., Boca Raton, FL 33431, United States
| | - Vijaya Iragavarapu
- Charles E. Schmidt College of Medicine, Florida Atlantic University, 777 Glades Rd., Boca Raton, FL 33431, United States
| | - Maciej J Stawikowski
- Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science, Florida Atlantic University, 777 Glades Rd., Boca Raton, FL 33431, United States
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Magnetic Nanoparticles of Zinc/Calcium Ferrite Decorated with Silver for Photodegradation of Dyes. MATERIALS 2019; 12:ma12213582. [PMID: 31683585 PMCID: PMC6862608 DOI: 10.3390/ma12213582] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/23/2019] [Accepted: 10/29/2019] [Indexed: 02/04/2023]
Abstract
Magnetic nanoparticles of zinc/calcium ferrite and decorated with silver were prepared by coprecipitation method. The obtained nanoparticles were characterized by UV/Visible absorption, XRD, TEM and SQUID. The mixed zinc/calcium ferrites exhibit an optical band gap of 1.78 eV. HR-TEM imaging showed rectangular nanoplate shapes with sizes of 10 ± 3 nm and aspect ratio mainly between 1 and 1.5. Magnetic measurements indicated a superparamagnetic behavior. XRD diffractograms allowed a size estimation of 4 nm, which was associated with the nanoplate thickness. The silver-decorated zinc/calcium ferrite nanoparticles were successfully employed in the photodegradation of a model dye (Rhodamine B) and industrial textile dyes (CI Reactive Red 195, CI Reactive Blue 250 and CI Reactive Yellow 145). The nanosystems developed exhibited promising results for industrial application in effluent photoremediation using visible light, with the possibility of magnetic recovery.
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Buschbeck L, Markovic A, Wittstock G, Christoffers J. Diaminoterephthalate-α-lipoic acid conjugates with fluorinated residues. Beilstein J Org Chem 2019; 15:981-991. [PMID: 31164936 PMCID: PMC6541350 DOI: 10.3762/bjoc.15.96] [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: 02/28/2019] [Accepted: 04/18/2019] [Indexed: 11/23/2022] Open
Abstract
Two bifunctional diaminoterephthalate (DAT) fluorescence dyes were prepared in a three-step sequence including one deprotection reaction. One functional unit is α-lipoic acid (ALA) for binding the dye to gold surfaces. It was introduced to the DAT scaffold by an amidation reaction. The other functional unit is a para-(trifluoromethyl)benzyl group for facile detection of the surface-bound material by X-ray photoelectron spectroscopy (XPS). This residue was introduced by reductive amination of the DAT scaffold with the respective benzaldehyde derivative. In one compound (60% yield over three steps) the ALA unit is directly bound to the DAT as a relatively electron-withdrawing amide. In solution (CH2Cl2), this material shows strong fluorescence (quantum yield 57% with emission at 495 nm, absorption maximum at 420 nm). The other compound (57% yield over three steps) possesses a propylene spacer between the ALA and the DAT units for electronic decoupling, thus, bathochromic shifts are observed (absorption at 514 nm, emission at 566 nm). The quantum yield is, however, lower (4%). Self-assembled monolayers on a gold surface of both compounds were prepared and characterized by high-resolution XPS of the C 1s, O 1s, S 2p, N 1s and F 1s emissions. The high signal-to-noise ratios of the F 1s peaks indicated that trifluoromethylation is an excellent tool for the detection of surface-bound materials by XPS.
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Affiliation(s)
- Leon Buschbeck
- Institut für Chemie, Universität Oldenburg, Carl von Ossietzky-Str. 9–11, D-26129 Oldenburg, Germany
| | - Aleksandra Markovic
- Institut für Chemie, Universität Oldenburg, Carl von Ossietzky-Str. 9–11, D-26129 Oldenburg, Germany
| | - Gunther Wittstock
- Institut für Chemie, Universität Oldenburg, Carl von Ossietzky-Str. 9–11, D-26129 Oldenburg, Germany
| | - Jens Christoffers
- Institut für Chemie, Universität Oldenburg, Carl von Ossietzky-Str. 9–11, D-26129 Oldenburg, Germany
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Chang YY, Wu HL, Fang H, Wang T, Liu Z, Ouyang YZ, Ding YJ, Yu RQ. Rapid, simultaneous and interference-free determination of three rhodamine dyes illegally added into chilli samples using excitation-emission matrix fluorescence coupled with second-order calibration method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:141-149. [PMID: 29925046 DOI: 10.1016/j.saa.2018.06.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 06/08/2018] [Accepted: 06/09/2018] [Indexed: 06/08/2023]
Abstract
In this study, a smart and green analytical method based on the second-order calibration algorithm coupled with excitation-emission matrix (EEM) fluorescence was developed for the determination of rhodamine dyes illegally added into chilli samples. The proposed method not only has the advantage of high sensitivity over the traditional fluorescence method but also fully displays the "second-order advantage". Pure signals of analytes were successfully extracted from severely interferential EEMs profiles via using alternating trilinear decomposition (ATLD) algorithm even in the presence of common fluorescence problems such as scattering, peak overlaps and unknown interferences. It is worth noting that the unknown interferents can denote different kinds of backgrounds, not only refer to a constant background. In addition, the method using interpolation method could avoid the information loss of analytes of interest. The use of "mathematical separation" instead of complicated "chemical or physical separation" strategy can be more effective and environmentally friendly. A series of statistical parameters including figures of merit and RSDs of intra- (≤1.9%) and inter-day (≤6.6%) were calculated to validate the accuracy of the proposed method. Furthermore, the authoritative method of HPLC-FLD was adopted to verify the qualitative and quantitative results of the proposed method. Compared with the two methods, it also showed that the ATLD-EEMs method has the advantages of accuracy, rapidness, simplicity and green, which is expected to be developed as an attractive alternative method for simultaneous and interference-free determination of rhodamine dyes illegally added into complex matrices.
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Affiliation(s)
- Yue-Yue Chang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Hai-Long Wu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
| | - Huan Fang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Tong Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Zhi Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yang-Zi Ouyang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yu-Jie Ding
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Ru-Qin Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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Segelken J, Wallisch M, Schultz K, Christoffers J, Janssen-Bienhold U. Synthesis and Evaluation of Two Novel All -trans-Retinoic Acid Conjugates: Biocompatible and Functional Tools for Retina Research. ACS Chem Neurosci 2018; 9:858-867. [PMID: 29482329 DOI: 10.1021/acschemneuro.7b00452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The vitamin A derivative all- trans-retinoic acid (ATRA) is an important biologically active metabolite that regulates a variety of essential biological processes in particular via gene-regulatory mechanisms. In the retina, ATRA is a light-dependent byproduct of the phototransduction cascade. Here, ATRA is not only needed for proper retinal development, but it also acts as a neuromodulator on horizontal cells, second-order inhibitory neurons in the outer retina, which reveal morphological and physiological changes when the retina is treated with ATRA. There is evidence that gene-regulatory mechanisms may only be partially involved in these neuromodulatory processes and the underlying nontranscriptional mechanisms are still elusive. This is, among other things, due to the lack of appropriately labeled ATRA, which would allow the tracking of ATRA in cells or a given tissue. To overcome this obstacle, we designed, synthesized, and evaluated two conjugates of ATRA, one conjugated with biotin (biotin-ATRA) and one conjugated with diaminoterephthalate fluorophore (DAT-ATRA), as molecular tools for different fields of application. The biocompatibility of both compounds was demonstrated via cell viability assays in cultured N2a-cells. N2a-cells exposed to the compounds showed no significant changes in the viability rate. The functionality of synthesized ATRA-conjugates was verified using retinal tissue derived from adult carp. The binding of ATRA-conjugates to distinct retinal cells was assessed in primary cultures of carp retina. Hereby, horizontal and Müller cells have been identified as specific target cells of the new ATRA compounds. Electron microscopy further confirmed that the new substances are still able to induce synaptic plasticity at horizontal cell dendrites resulting in formation of spine synapses, as it is shown for native ATRA. Taken together, the novel ATRA-conjugates represent biocompatible and functional molecular tools, which may further provide the possibility to track ATRA in neuronal cells and study its modulatory effects in different cell systems.
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Affiliation(s)
- Jasmin Segelken
- Neurobiology, University of Oldenburg, D-26111 Oldenburg, Germany
- Visual Neuroscience, Department of Neuroscience, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Melanie Wallisch
- Institut für Chemie, Universität Oldenburg, D-26111 Oldenburg, Germany
| | - Konrad Schultz
- Neurobiology, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Jens Christoffers
- Institut für Chemie, Universität Oldenburg, D-26111 Oldenburg, Germany
| | - Ulrike Janssen-Bienhold
- Neurobiology, University of Oldenburg, D-26111 Oldenburg, Germany
- Visual Neuroscience, Department of Neuroscience, University of Oldenburg, D-26111 Oldenburg, Germany
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
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Buschbeck L, Christoffers J. Orthogonally Protected Diaminoterephthalate Scaffolds: Installation of Two Functional Units at the Chromophore. J Org Chem 2018. [PMID: 29533652 DOI: 10.1021/acs.joc.8b00347] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The 2,5-diaminoterephthalate structural motif is a powerful chromophore with remarkable fluorescence properties. Containing two carboxylate and two amino functions, it defines a colored molecular scaffold which allows for orthogonal functionalization with different functional units. Therefore, different applications in life sciences and materials science could be addressed. In this study, the two amino functions were alkylated by reductive amination with side chains carrying amino (orthogonally protected as Boc or Alloc) and carboxylate functions (orthogonally protected as tBu or allyl ester). After sequential deprotections, functional units were introduced by amidation reactions. As three examples, the chromophore was coupled with retinoic acid and fullerene C60 in order to obtain a triad for studying photoinduced electron transfer processes. Furthermore, cyclooctyne and azide moieties were introduced as functional units, allowing for ligation by click reactions. These two clickable groups were applied in combination with maleimide units which are reactive toward thiol residues. The latter dyes define so-called "turn on" probes, since the fluorescence quantum yields increased by one order of magnitude upon reaction with the molecular target.
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Affiliation(s)
- Leon Buschbeck
- Institut für Chemie , Carl von Ossietzky Universität Oldenburg , 26111 Oldenburg , Germany
| | - Jens Christoffers
- Institut für Chemie , Carl von Ossietzky Universität Oldenburg , 26111 Oldenburg , Germany
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Comprehensive spectroscopic studies of cis and trans isomers of red-phosphorescent heteroleptic iridium(III) complexes. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2016.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Taniguchi M, Lindsey JS. Database of Absorption and Fluorescence Spectra of >300 Common Compounds for use in Photochem
CAD. Photochem Photobiol 2018; 94:290-327. [DOI: 10.1111/php.12860] [Citation(s) in RCA: 236] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 10/22/2017] [Indexed: 12/11/2022]
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Tomazio NB, Boni LD, Mendonca CR. Low threshold Rhodamine-doped whispering gallery mode microlasers fabricated by direct laser writing. Sci Rep 2017; 7:8559. [PMID: 28819218 PMCID: PMC5561067 DOI: 10.1038/s41598-017-09293-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 07/14/2017] [Indexed: 11/09/2022] Open
Abstract
The combination of the outstanding properties of whispering gallery modes with both the flexibility and ease of processing of polymers is particularly attractive for photonics applications. However, the versatile fabrication of polymeric nano/microdevices with the desired photonic performance has proven challenging. Here, we report on lasing in Rhodamine B doped whispering gallery mode microcavities fabricated by direct laser writing via two-photon polymerization. Threshold pump energies as low as 12 nJ were achieved for free-space pulsed excitation at 532 nm. To the best of our knowledge, this is the lowest laser threshold attained for microcavities fabricated in a single step of femtosecond laser writing, a remarkable feat that stands out from other fabrication methods.
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Affiliation(s)
- Nathália B Tomazio
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, SP, Brazil
| | - Leonardo De Boni
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, SP, Brazil
| | - Cleber R Mendonca
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, SP, Brazil.
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Wallisch M, Sulmann S, Koch KW, Christoffers J. Bifunctional Diaminoterephthalate Fluorescent Dye as Probe for Cross-Linking Proteins. Chemistry 2017; 23:6535-6543. [DOI: 10.1002/chem.201700774] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Melanie Wallisch
- Institut für Chemie; Carl von Ossietzky-Universität Oldenburg; 26111 Oldenburg Germany
| | - Stefan Sulmann
- Biochemistry Group, Department of Neuroscience; Carl von Ossietzky-Universität Oldenburg; 26111 Oldenburg Germany
| | - Karl-Wilhelm Koch
- Biochemistry Group, Department of Neuroscience; Carl von Ossietzky-Universität Oldenburg; 26111 Oldenburg Germany
| | - Jens Christoffers
- Institut für Chemie; Carl von Ossietzky-Universität Oldenburg; 26111 Oldenburg Germany
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Enciso P, Decoppet JD, Grätzel M, Wörner M, Cabrerizo FM, Cerdá MF. A cockspur for the DSS cells: Erythrina crista-galli sensitizers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 176:91-98. [PMID: 28081494 DOI: 10.1016/j.saa.2017.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 12/08/2016] [Accepted: 01/02/2017] [Indexed: 06/06/2023]
Abstract
Dye sensitized solar cells were assembled employing a mixture of anthocyanins extracted from red ceibo's flowers. At the literature different extraction procedures are reported to extract anthocyanins from natural products and sensitize the cells. In order to compare them, different methods were followed to set the cells under the same conditions. Assembled cells showed very interesting conversion efficiency values, reaching a 0.73% value for extracts purified using C18 column, in open cells under illumination using a solar light simulator, 1 sun, 1.5 AM. Data reported herein prove that anthocyanins obtained from ceibo's flower, after simple further purification, might represent an excellent, cheap and clean alternative for the development of DSS cells.
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Affiliation(s)
- Paula Enciso
- Laboratorio de Biomateriales, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | | | - Michael Grätzel
- Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland
| | | | - Franco M Cabrerizo
- Instituto de Investigaciones Biotecnológicas - Instituto Tecnológico de Chascomús (IIB-INTECH), Universidad Nacional de San Martín (UNSAM) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Intendente Marino km 8.2, CC 164, B7130IWA Chascomús, Buenos Aires, Argentina
| | - María Fernanda Cerdá
- Laboratorio de Biomateriales, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay.
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Gontero D, Veglia AV, Bracamonte AG, Boudreau D. Synthesis of ultraluminescent gold core–shell nanoparticles as nanoimaging platforms for biosensing applications based on metal-enhanced fluorescence. RSC Adv 2017. [DOI: 10.1039/c6ra27649k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Core–shell nanoparticles are versatile nanostructures that can be applied as luminescent biosensing platforms in many nanotechnological developments.
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Affiliation(s)
- D. Gontero
- Laboratorio de Análisis Clínicos y Bacteriológicos
- Clínica de la Familia II
- Río Tercero
- Argentina
| | - A. V. Veglia
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC)
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad Nacional de Córdoba
- Ciudad Universitaria
| | - A. G. Bracamonte
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC)
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad Nacional de Córdoba
- Ciudad Universitaria
| | - D. Boudreau
- Departement de chimie and Centre d'optique
- photonique et laser (COPL)
- Université Laval
- Québec (QC)
- Canada
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Anand V, Dhamodharan R. White light emission from fluorene-EDOT and phenothiazine-hydroquinone based D–π–A conjugated systems in solution, gel and film forms. NEW J CHEM 2017. [DOI: 10.1039/c7nj01064h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The appropriate composition of two new D–π–A conjugated organic molecules in combination with rhodamine B is observed to emit cool white light in solution and solid states.
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Affiliation(s)
- Vivek Anand
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai-600036
- India
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34
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Santra K, Smith EA, Petrich JW, Song X. Photon Counting Data Analysis: Application of the Maximum Likelihood and Related Methods for the Determination of Lifetimes in Mixtures of Rose Bengal and Rhodamine B. J Phys Chem A 2016; 121:122-132. [PMID: 27936713 DOI: 10.1021/acs.jpca.6b10728] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It is often convenient to know the minimum amount of data needed to obtain a result of desired accuracy and precision. It is a necessity in the case of subdiffraction-limited microscopies, such as stimulated emission depletion (STED) microscopy, owing to the limited sample volumes and the extreme sensitivity of the samples to photobleaching and photodamage. We present a detailed comparison of probability-based techniques (the maximum likelihood method and methods based on the binomial and the Poisson distributions) with residual minimization-based techniques for retrieving the fluorescence decay parameters for various two-fluorophore mixtures, as a function of the total number of photon counts, in time-correlated, single-photon counting experiments. The probability-based techniques proved to be the most robust (insensitive to initial values) in retrieving the target parameters and, in fact, performed equivalently to 2-3 significant figures. This is to be expected, as we demonstrate that the three methods are fundamentally related. Furthermore, methods based on the Poisson and binomial distributions have the desirable feature of providing a bin-by-bin analysis of a single fluorescence decay trace, which thus permits statistics to be acquired using only the one trace not only for the mean and median values of the fluorescence decay parameters but also for the associated standard deviations. These probability-based methods lend themselves well to the analysis of the sparse data sets that are encountered in subdiffraction-limited microscopies.
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Affiliation(s)
- Kalyan Santra
- Department of Chemistry, Iowa State University, and U.S. Department of Energy, Ames Laboratory , Ames, Iowa 50011, United States
| | - Emily A Smith
- Department of Chemistry, Iowa State University, and U.S. Department of Energy, Ames Laboratory , Ames, Iowa 50011, United States
| | - Jacob W Petrich
- Department of Chemistry, Iowa State University, and U.S. Department of Energy, Ames Laboratory , Ames, Iowa 50011, United States
| | - Xueyu Song
- Department of Chemistry, Iowa State University, and U.S. Department of Energy, Ames Laboratory , Ames, Iowa 50011, United States
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35
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Rahdar A, Almasi-Kashi M, Mohamed N. Light scattering and optic studies of Rhodamine B-comprising cylindrical-like AOT reversed micelles. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.09.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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36
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Nano-supramolecular complex synthesis: Switch on/off enhanced fluorescence control and molecular release using a simple chemistry reaction. Microchem J 2016. [DOI: 10.1016/j.microc.2016.05.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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37
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Liao Z, Bogh SA, Santella M, Rein C, Sørensen TJ, Laursen BW, Vosch T. Emissive Photoconversion Products of an Amino-triangulenium Dye. J Phys Chem A 2016; 120:3554-61. [PMID: 27149340 DOI: 10.1021/acs.jpca.6b03134] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Upon prolonged exposure to intense blue light, the tris(diethylamino)-trioxatriangulenium (A3-TOTA(+)) fluorophore can undergo a photochemical reaction to form either a blue-shifted or a red-shifted fluorescent photoproduct. The formation of the latter depends on the amount of oxygen present during the photoconversion. The A3-TOTA(+) fluorophore is structurally similar to rhodamine, with peripheral amino groups on a cationic aromatic system. The photoconversion products were identified by UV-vis absorption and steady-state and time-resolved fluorescence spectroscopy, and further characterized by HPLC, LC-MS, and (1)H NMR. Two reaction pathways were identified: a dealkylation reaction and an oxidation leading to formation of one or more amide groups on the peripheral donor groups. The photoconversion is controlled by the experimental conditions, in particular the presence of oxygen and water, and the choice of solvent. The results highlight the need to characterize the formation of fluorescent photoproducts of commonly used fluorescent probes, since these could give rise to false positives in multicolor/multilabel imaging, colocalization studies, and FRET based assays. Finally, an improved understanding of the photochemical reaction leading to bleaching of fluorescent dyes can lead to the creation of specific probes for fluorescence based monitoring of chemical reactions.
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Affiliation(s)
- Zhiyu Liao
- Nano-Science Center and Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Sidsel Ammitzbøll Bogh
- Nano-Science Center and Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Marco Santella
- Nano-Science Center and Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Christian Rein
- Nano-Science Center and Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Thomas Just Sørensen
- Nano-Science Center and Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Bo W Laursen
- Nano-Science Center and Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Tom Vosch
- Nano-Science Center and Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
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38
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Sørensen TJ, Shi D, Laursen BW. Tetramethoxy-Aminorhodamine (TMARh): A Bichromophore, an Improved Fluorophore, and a pH Switch. Chemistry 2016; 22:7046-9. [PMID: 26995766 DOI: 10.1002/chem.201600496] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 11/12/2022]
Abstract
Rhodamine is one of the most widely used fluorescent dyes. Here, a new synthetic pathway to the popular dyes is reported and the effect of adding four methoxy groups to the molecular structure is investigated. Tetramethoxy-aminorhodamine (TMARh) is found to show superior pH switching compared to the rhodamine without the four methoxy groups, owing to changed properties of the dark "off" state and increased fluorescence intensity in the protonated "on" state.
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Affiliation(s)
- Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark
| | - Dong Shi
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark
| | - Bo W Laursen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark.
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39
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Sulmann S, Wallisch M, Scholten A, Christoffers J, Koch KW. Mapping Calcium-Sensitive Regions in the Neuronal Calcium Sensor GCAP2 by Site-Specific Fluorescence Labeling. Biochemistry 2016; 55:2567-77. [DOI: 10.1021/acs.biochem.6b00005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Sulmann
- Biochemistry
Group, Department of Neurosciences, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Germany
| | - Melanie Wallisch
- Institut
für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Germany
| | - Alexander Scholten
- Biochemistry
Group, Department of Neurosciences, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Germany
| | - Jens Christoffers
- Institut
für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Germany
| | - Karl-Wilhelm Koch
- Biochemistry
Group, Department of Neurosciences, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Germany
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40
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Soleilhac A, Girod M, Dugourd P, Burdin B, Parvole J, Dugas PY, Bayard F, Lacôte E, Bourgeat-Lami E, Antoine R. Temperature Response of Rhodamine B-Doped Latex Particles. From Solution to Single Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4052-4058. [PMID: 27042942 DOI: 10.1021/acs.langmuir.6b00647] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanoparticle-based temperature imaging is an emerging field of advanced applications. Herein, the sensitivity of the fluorescence of rhodamine B-doped latex nanoparticles toward temperature is described. Submicrometer size latex particles were prepared by a surfactant-free emulsion polymerization method that allowed a simple and inexpensive way to incorporate rhodamine B into the nanoparticles. Also, rhodamine B-coated latex nanoparticles dispersed in water were prepared in order to address the effect of the dye location in the nanoparticles on their temperature dependence. A better linearity of the temperature dependence emission of the rhodamine B-embedded latex particles, as compared to that of free rhodamine B dyes or rhodamine B-coated latex particles, is observed. Temperature-dependent fluorescence measurements by fluorescent confocal microscopy on individual rhodamine B-embedded latex particles were found similar to those obtained for fluorescent latex nanoparticles in solution, indicating that these nanoparticles could be good candidates to probe thermal processes as nanothermometers.
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Affiliation(s)
- Antonin Soleilhac
- Institut lumière matière, UMR 5306 Université Claude Bernard Lyon1-CNRS, Université de Lyon , 69622 Villeurbanne, Cedex, France
| | - Marion Girod
- Institut des Sciences Analytiques, UMR 5280/CNRS, ENS Lyon, UCB Lyon 1, Université de Lyon , Villeurbanne, France
| | - Philippe Dugourd
- Institut lumière matière, UMR 5306 Université Claude Bernard Lyon1-CNRS, Université de Lyon , 69622 Villeurbanne, Cedex, France
| | - Béatrice Burdin
- Centre Technologique des Microstructures, Université Claude Bernard Lyon 1 , Bâtiment Darwin B, 5 rue Raphaël Dubois, 69622 Villeurbanne, Cedex, France
| | - Julien Parvole
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Pierre-Yves Dugas
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - François Bayard
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Emmanuel Lacôte
- Hydrazines, et Composés Energétiques Polyazotés (LHCEP), UMR 5278, CNRS, CNES, HERAKLES-SAFRAN, UCBL , Bâtiment Berthollet, 22 Avenue Gaston Berger, 69622 Villeurbanne, Cedex, France
| | - Elodie Bourgeat-Lami
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Rodolphe Antoine
- Institut lumière matière, UMR 5306 Université Claude Bernard Lyon1-CNRS, Université de Lyon , 69622 Villeurbanne, Cedex, France
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41
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Oh T, Choi JY, Heller MJ. Enhanced fluorescent resonant energy transfer of DNA conjugates complexed with surfactants and divalent metal ions. Analyst 2016; 141:2371-5. [PMID: 26985458 DOI: 10.1039/c5an02516h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dimerization and resultant quenching of donor and acceptor dyes conjugated on DNA causes loss of fluorescent resonant energy transfer (FRET) efficiency. However, when complexed with surfactants and divalent metal ions, sheathing effects insulate and shield the DNA structures, reducing dimerization and quenching which leads to significant enhancement of FRET efficiency.
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Affiliation(s)
- Taeseok Oh
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
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42
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The Fluorescence Properties of Three Rhodamine Dye Analogues: Acridine Red, Pyronin Y and Pyronin B. J Fluoresc 2015; 25:1151-8. [DOI: 10.1007/s10895-015-1610-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 06/30/2015] [Indexed: 11/30/2022]
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43
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Zhao W, Li B, Xu S, Zhao Q. DFT/TD-DFT study of the structural and spectral properties of two forms of Rhodamine B. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1142/s0219633615500303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The absorption wavelengths of the two forms of Rhodamine B, cation and zwitterion, were investigated by Time-Dependent Density Functional Theory (TD-DFT) in combination with polarizable continuum model. The redshift in absorption spectrum of cation relative to zwitterion is attributed to strong inductive effect of carboxyphenyl group and weak electrostatic repulsion between xanthene ring and carboxyphenyl group. The absorption wavelengths of cation and zwitterion decrease linearly with increase of solvent polarity in normal alcohols since in high polar solvents electrostatic repulsion between xanthene ring and carboxyphenyl group increases and affects xanthene π conjugation system. The absorption wavelengths in water and formamide show a deviation from linear relationship because large dielectric constant hinders electrostatic repulsion between carboxyphenyl group and xanthene π system. The hydrogen bonds affect absorption wavelengths because hydrogen bonds could affect conjugation between amino N atoms and xanthene π system or electrostatic repulsion between carboxyphenyl group and xanthene ring. These results indicate electrostatic repulsion between carboxyphenyl group and xanthene ring plays a big role in determining absorption spectrum of Rhodamine B.
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Affiliation(s)
- Wenwei Zhao
- School of Chemistry and Chemical Engineering, Linyi University, Linyi, Shandong 276005, P. R. China
| | - Baohui Li
- School of Chemistry and Chemical Engineering, Linyi University, Linyi, Shandong 276005, P. R. China
| | - Shuyong Xu
- School of Chemistry and Chemical Engineering, Linyi University, Linyi, Shandong 276005, P. R. China
| | - Qiang Zhao
- School of Chemistry and Chemical Engineering, Linyi University, Linyi, Shandong 276005, P. R. China
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44
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Daly S, Kulesza A, Knight G, MacAleese L, Antoine R, Dugourd P. Visible and Ultraviolet Spectroscopy of Gas Phase Rhodamine 575 Cations. J Phys Chem A 2015; 119:5634-41. [DOI: 10.1021/acs.jpca.5b03187] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steven Daly
- Université de Lyon, F-69622, Lyon, France
- CNRS et Université
Lyon 1, UMR5306, Institut Lumière Matière, 69622, Villeurbanne CEDEX, France
| | - Alexander Kulesza
- Université de Lyon, F-69622, Lyon, France
- CNRS et Université
Lyon 1, UMR5306, Institut Lumière Matière, 69622, Villeurbanne CEDEX, France
| | - Geoffrey Knight
- Université de Lyon, F-69622, Lyon, France
- CNRS et Université
Lyon 1, UMR5306, Institut Lumière Matière, 69622, Villeurbanne CEDEX, France
| | - Luke MacAleese
- Université de Lyon, F-69622, Lyon, France
- CNRS et Université
Lyon 1, UMR5306, Institut Lumière Matière, 69622, Villeurbanne CEDEX, France
| | - Rodolphe Antoine
- Université de Lyon, F-69622, Lyon, France
- CNRS et Université
Lyon 1, UMR5306, Institut Lumière Matière, 69622, Villeurbanne CEDEX, France
| | - Philippe Dugourd
- Université de Lyon, F-69622, Lyon, France
- CNRS et Université
Lyon 1, UMR5306, Institut Lumière Matière, 69622, Villeurbanne CEDEX, France
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45
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Sørensen TJ, Kilså K, Laursen BW. Aminorhodamine (ARh): A Bichromophore with Three Emission Bands in Low Temperature Glasses. Chemistry 2015; 21:8521-9. [PMID: 25916892 DOI: 10.1002/chem.201500355] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas Just Sørensen
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø (Denmark).
| | - Kristine Kilså
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø (Denmark)
- Present address: Faculty of Landscape Architecture, Horticulture, and Crop Production Science, Swedish University of Agricultural Sciences, Box 55, 230 53 Alnarp (Sweden)
| | - Bo W Laursen
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø (Denmark).
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46
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Freimuth L, Christoffers J. Bifunctional Diaminoterephthalate Scaffolds as Fluorescence Turn-On Probes for Thiols. Chemistry 2015; 21:8214-21. [DOI: 10.1002/chem.201500494] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Indexed: 11/12/2022]
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47
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Arai S, Suzuki M, Park SJ, Yoo JS, Wang L, Kang NY, Ha HH, Chang YT. Mitochondria-targeted fluorescent thermometer monitors intracellular temperature gradient. Chem Commun (Camb) 2015; 51:8044-7. [DOI: 10.1039/c5cc01088h] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A small molecule fluorescent thermometer targeting mitochondria (Mito thermo yellow) enables us to monitor the intracellular temperature gradient, generated by exogenous heating in various cells.
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Affiliation(s)
- Satoshi Arai
- Department of Chemistry and MedChem Program of Life Sciences Institute
- National University of Singapore
- Singapore
- Organization for University Research Initiatives
- Waseda University
| | - Madoka Suzuki
- Organization for University Research Initiatives
- Waseda University
- Japan
- WASEDA Bioscience Research Institute in Singapore (WABIOS)
- Singapore
| | - Sung-Jin Park
- Singapore Bioimaging Consortium
- Agency for Science
- Technology and Research (A*STAR)
- Singapore
| | - Jung Sun Yoo
- Smart Humanity Convergence Center
- Graduate School of Convergence Science and Technology
- Seoul National University
- Suwan
- Korea
| | - Lu Wang
- Department of Chemistry and MedChem Program of Life Sciences Institute
- National University of Singapore
- Singapore
| | - Nam-Young Kang
- Singapore Bioimaging Consortium
- Agency for Science
- Technology and Research (A*STAR)
- Singapore
| | - Hyung-Ho Ha
- College of Pharmacy
- Sunchon National University
- Sunchon 540-742
- Republic of Korea
| | - Young-Tae Chang
- Department of Chemistry and MedChem Program of Life Sciences Institute
- National University of Singapore
- Singapore
- Singapore Bioimaging Consortium
- Agency for Science
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48
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A molecular fluorescent probe for targeted visualization of temperature at the endoplasmic reticulum. Sci Rep 2014; 4:6701. [PMID: 25330751 PMCID: PMC4204065 DOI: 10.1038/srep06701] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 10/02/2014] [Indexed: 12/23/2022] Open
Abstract
The dynamics of cellular heat production and propagation remains elusive at a subcellular level. Here we report the first small molecule fluorescent thermometer selectively targeting the endoplasmic reticulum (ER thermo yellow), with the highest sensitivity reported so far (3.9%/°C). Unlike nanoparticle thermometers, ER thermo yellow stains the target organelle evenly without the commonly encountered problem of aggregation, and successfully demonstrates the ability to monitor intracellular temperature gradients generated by external heat sources in various cell types. We further confirm the ability of ER thermo yellow to monitor heat production by intracellular Ca2+ changes in HeLa cells. Our thermometer anchored at nearly-zero distance from the ER, i.e. the heat source, allowed the detection of the heat as it readily dissipated, and revealed the dynamics of heat production in real time at a subcellular level.
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49
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Hay CE, Marken F, Blanchard GJ. Detection and characterization of liquid|solid and liquid|liquid|solid interfacial gradients of water nanodroplets in wet N-octyl-2-pyrrolidone. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9951-9961. [PMID: 25101792 DOI: 10.1021/la502743j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the rotational diffusion dynamics and fluorescence lifetime of lissamine rhodamine B sulfonyl chloride (LRSC) in two thin-film experimental configurations. These are liquid|solid interfaces, where N-octyl-2-pyrrolidone (NOP) containing water and ethylene glycol (EG) thin films are each supported on glass, and a liquid|liquid|solid interface where thin films of water and NOP, both supported on glass, are in contact with one another, forming an NOP|water interface. The reorientation dynamics and fluorescence lifetime of LRSC are measured as a function of distance from the NOP|glass and EG|glass interfaces and from the NOP|water and NOP|glass interfaces in the liquid|liquid|solid experimental configuration. Fluorescence anisotropy decay data from the liquid|solid systems reveal a liquid film depth-dependent gradient spanning tens of micrometers from the NOP|glass interface into the wet NOP phase, while this gradient is absent in EG. We interpret these findings in the context of a compositional gradient in the NOP phase. The spatially resolved fluorescence lifetime and anisotropy decay data for an NOP|water|glass interfacial structure exhibits the absence of a gradient in the anisotropy decay profile normal to the NOP|water interface and the presence of a fluorescence lifetime gradient as a function of distance from the NOP|water interface. The compositional heterogeneity for both interfacial systems is in the form of water nanodroplets in the NOP phase. We understand this compositional gradient in the context of the relative surface energies of the water, NOP, and glass components.
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Affiliation(s)
- Christine E Hay
- Michigan State University , Department of Chemistry, East Lansing, Michigan 48824, United States
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50
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Jahn K, Hille C. Asante Calcium Green and Asante Calcium Red--novel calcium indicators for two-photon fluorescence lifetime imaging. PLoS One 2014; 9:e105334. [PMID: 25140519 PMCID: PMC4139374 DOI: 10.1371/journal.pone.0105334] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 07/21/2014] [Indexed: 11/18/2022] Open
Abstract
For a comprehensive understanding of cellular processes and potential dysfunctions therein, an analysis of the ubiquitous intracellular second messenger calcium is of particular interest. This study examined the suitability of the novel Ca2+-sensitive fluorescent dyes Asante Calcium Red (ACR) and Asante Calcium Green (ACG) for two-photon (2P)-excited time-resolved fluorescence measurements. Both dyes displayed sufficient 2P fluorescence excitation in a range of 720–900 nm. In vitro, ACR and ACG exhibited a biexponential fluorescence decay behavior and the two decay time components in the ns-range could be attributed to the Ca2+-free and Ca2+-bound dye species. The amplitude-weighted average fluorescence decay time changed in a Ca2+-dependent way, unraveling in vitro dissociation constants KD of 114 nM and 15 nM for ACR and ACG, respectively. In the presence of bovine serum albumin, the absorption and steady-state fluorescence behavior of ACR was altered and its biexponential fluorescence decay showed about 5-times longer decay time components indicating dye-protein interactions. Since no ester derivative of ACG was commercially available, only ACR was evaluated for 2P-excited fluorescence lifetime imaging microscopy (2P-FLIM) in living cells of American cockroach salivary glands. In living cells, ACR also exhibited a biexponential fluorescence decay with clearly resolvable short (0.56 ns) and long (2.44 ns) decay time components attributable to the Ca2+-free and Ca2+-bound ACR species. From the amplitude-weighted average fluorescence decay times, an in situ KD of 180 nM was determined. Thus, quantitative [Ca2+]i recordings were realized, unraveling a reversible dopamine-induced [Ca2+]i elevation from 21 nM to 590 nM in salivary duct cells. It was concluded that ACR is a promising new Ca2+ indicator dye for 2P-FLIM recordings applicable in diverse biological systems.
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Affiliation(s)
- Karolina Jahn
- Department of Physical Chemistry/ALS ComBi, University of Potsdam, Potsdam, Germany
| | - Carsten Hille
- Department of Physical Chemistry/ALS ComBi, University of Potsdam, Potsdam, Germany
- * E-mail:
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