16761-04-9Relevant articles and documents
Intraduplex DNA-mediated electrochemistry of covalently tethered redox-active reporters
Pheeney, Catrina G.,Barton, Jacqueline K.
, p. 14944 - 14947 (2013)
Intraduplex DNA-mediated reduction is established as a general mechanism for the reduction of distally bound stacked redox-active species covalently tethered to DNA through flexible alkane linkages. Methylene Blue (MB), Nile Blue (NB), and Anthraquinone (AQ) were covalently tethered to DNA with three different covalent linkages. Using these reporters DNA electrochemistry was shown to be both DNA-mediated and intra-, rather than inter-, duplex. Significantly, the charge transport pathway occurring through the DNA π-stack is established by using an intervening AC mismatch to break this path. The fact that the DNA-mediated reduction of MB occurs primarily via intraduplex intercalation is established through varying the proximity and integrity of the neighboring duplex DNA.
OXAZINE-BASED FLUOROPHORE COMPOUNDS FOR NERVE-SPECIFIC IMAGING
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Page/Page column 32, (2021/07/31)
This invention concerns novel oxazine-based fluorophore compounds useful in invivo nerve imaging, as well as compositions comprising them and methods for their use.
NEAR-INFRARED NERVE-SPARING FLUOROPHORES
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Page/Page column 47, (2020/02/17)
Provided are far red to near-infrared nerve-sparing fluorescent compounds, compositions comprising them, and methods of their use in medical procedures.
NERVE-SPECIFIC FLUOROPHORE FORMULATIONS FOR DIRECT AND SYSTEMIC ADMINISTRATION
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Paragraph 0166-0167, (2020/03/02)
Nerve-specific fluorophore formulations for direct or systemic administration are described. The formulations can be used in fluorescence-guided surgery (FGS) to aid in nerve preservation during surgical interventions.
Quinazoline fluorescent probe and preparation method and application thereof
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Paragraph 0049-0052, (2020/02/27)
The invention belongs to the technical field of biomedicine and particularly relates to a quinazoline fluorescent probe and a preparation method and application thereof. The chemical formula of the quinazoline fluorescent probe is shown in the formula I, wherein R is selected from H or Cl; R is selected from fluorescent molecules; and n is an integer from 2 to 8. Through the quinazoline fluorescent probe and the preparation method and application thereof, the interference of autofluorescence of an organism can be eliminated, and the TSPO content in the organism can be detected efficiently and accurately.
Lysozyme-targeted ratiometric fluorescent probe for SO2 in living cells
Du, Jianjun,Fan, Jiangli,Li, Haidong,Lu, Yang,Peng, Xiaojun,Sun, Wen,Wang, Jingyun,Yao, Qichao
, (2020/05/05)
Sulfur dioxide (SO2) as a common environmental pollutant, participates in a variety of physiology and pathological processes in vivo. Lysosomes are considered to be cleaners of living cells and play a vital role in the process of metabolism. Exposure to excess SO2 will result in the increase risk of lysosomal dysfunction and induce multiple diseases. Herein a smart fluorescent probe LYSO-SO2 is developed, which achieved the ratio (F561 nm/F634 nm) identification of SO2 in vitro. LYSO-SO2 showed high sensitivity (detection limit 15.8 nM), rapidly response (within 5 s), and excellent selectivity. Additionally, this probe LYSO-SO2 has been successfully applied to the ratio monitoring SO2 in lysosomes which may provide an effective quantitative method for studying the physiological and pathological functions of SO2 in living cells.
Boron-containing organic light-emitting material and preparation method thereof
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Paragraph 0021; 0027-0029, (2020/06/20)
The invention discloses a boron-containing organic luminescent material NileRB and a synthesis method thereof. The structural general formula of the NileRB is shown as (I). The preparation method comprises the following steps: by taking 3-substituted phenol as a raw material, reacting with nitrite to generate a nitrosation product, then performing heating reaction with 1, 5-naphthyl diphenol, andfinally performing coordination complexation with boron trifluoride diethyl ether to generate a target product NileRB. The structure contains two chromophores: chromophores, chromophores and chromophores, the invention discloses a fluorine-boron-pyrrole-like and nicotine-red-like structural unit. The whole structure has good rigidity; the preparation method comprises the following steps: introducing boron fluoride into a structural parent of Nile red; fluorine ions have relatively strong hydrophobic capability, so that the stability of molecules is improved; meanwhile, coordination complexingcan increase the electron deficiency property of a structural system and increase an intramolecular strong push-pull conjugated system, and fluorine ions have strong hydrophobicity, so that the wholemolecule has a distorted conjugated structure, fluorescence quenching caused by aggregation in a solid state is avoided, and a bipolar luminescent material is formed.
A fluorescent probe for bisulfite ions: its application to two-photon tissue imaging
Agarwalla, Hridesh,Pal, Suman,Paul, Anirban,Jun, Yong Woong,Bae, Juryang,Ahn, Kyo Han,Srivastava, Divesh N.,Das, Amitava
, p. 7888 - 7894 (2016/12/16)
A benzoxazinone based fluorescent probe for the specific and efficient detection of bisulfite ions in aqueous medium is described. The probe formed a bisulfite/sulphite adduct with an associated turn-on fluorescence response in the red wavelength region. No interference was observed in the detection process from all possible competing anions and molecules, including cyanide ion, cysteine, homocysteine and glutathione. In addition, the probe showed a fast response time, low detection limit, and cell membrane permeability. Furthermore, the probe was two-photon excitable, enabling imaging of endogenous bisulfite ions in HeLa cells as well as in deep tissues from different organs of mouse.
Survey of Redox-Active Moieties for Application in Multiplexed Electrochemical Biosensors
Kang, Di,Ricci, Francesco,White, Ryan J.,Plaxco, Kevin W.
, p. 10452 - 10458 (2016/11/11)
Recent years have seen the development of a large number of electrochemical sandwich assays and reagentless biosensor architectures employing biomolecules modified via the attachment of a redox-active "reporter." Here we survey a large set of potential redox reporters in order to determine which exhibits the best long-duration stability in thiol-on-gold monolayer-based sensors and to identify reporter "sets" signaling at distinct, nonoverlapping redox potentials in support of multiplexing and error correcting ratiometric or differential measurement approaches. Specifically, we have characterized the performance of more than a dozen potential reporters that are, first, redox active within the potential window over which thiol-on-gold monolayers are reasonably stable and, second, are available commercially in forms that are readily conjugated to biomolecules or can be converted into such forms in one or two simple synthetic steps. To test each of these reporters we conjugated it to one terminus of a single-stranded DNA "probe" that was attached by its other terminus via a six-carbon thiol to a gold electrode to form an "E-DNA" sensor responsive to its complementary DNA target. We then measured the signaling properties of each sensor as well as its stability against repeated voltammetric scans and against deployment in and reuse from blood serum. Doing so we find that the performance of methylene blue-based, thiol-on-gold sensors is unmatched; the near-quantitative stability of such sensors against repeated scanning in even very complex sample matrices is unparalleled. While more modest, the stability of sensors employing a handful of other reporters, including anthraquinone, Nile blue, and ferrrocene, is reasonable. Our work thus serves as both to highlight the exceptional properties of methylene blue as a redox reporter in such applications and as a cautionary tale-we wish to help other researchers avoid fruitless efforts to employ the many, seemingly promising and yet ultimately inadequate reporters we have investigated. Finally, we hope that our work also serves as an illustration of the pressing need for the further development of useful redox reporters.
Fluorescent chemodosimeter for Cys/Hcy with a large absorption shift and imaging in living cells
Hu, Mingming,Fan, Jiangli,Li, Honglin,Song, Kedong,Wang, Song,Cheng, Guanghui,Peng, Xiaojun
supporting information; experimental part, p. 980 - 983 (2011/03/22)
A novel molecule T1 with efficient intramolecular charge transfer was designed as a fluorescent chemodosimeter for cysteine (Cys) and homocysteine (Hcy). Upon addition of Cys/Hcy, T1 exhibited greatly enhanced fluorescence intensity as well as a large absorption peak shift (70 nm), and can be used for bioimaging of Cys/Hcy in living cells and detection in human plasma by visual color change. The detection mechanism was proved by 1H NMR, mass spectrometry analysis and Gaussian calculations.