Long-Wavelength and Near-Infrared Fluorescence: State of the Art, Future Applications, and Standards

Miller, James N.

doi:10.1007/4243_2008_057

Cited by 15 publications

(9 citation statements)

References 37 publications

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“…Optical pH sensors rely on the use of materials that respond to pH with a change in their optical properties. As has been stated, 2,3 there is a clear trend towards sensors and assays operating at wavelengths above 500 nm. This is due to the following reasons (amongst others): (a) affordable strong light sources such as diode lasers are available in this spectral range; (b) most biological matter exhibits strong intrinsic background luminescence in the UV and shortwave visible, and (c), biomatter strongly absorbs light at wavelengths below 500 nm.…”

mentioning

confidence: 96%

pH sensor based on upconverting luminescent lanthanide nanorods

et al. 2009

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mentioning

confidence: 96%

pH sensor based on upconverting luminescent lanthanide nanorods

et al. 2009

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“…The detection of the affinity of the peptides to the keratin fraction was achieved with a fluorescence labeled probe, Alexa Fluor 647 succinimidyl ester conjugated with the extracted hair keratins [30]. This fluorescent dye was chosen due to its photostability and intense fluorescence [24,31]. In this conjugation, we a degree of labeling of 0.9 mol of Alexa Fluor 647 per mole of keratin.…”

Section: Peptide Microarray Designmentioning

confidence: 99%

Peptide—protein interactions within human hair keratins

Cruz

Azóia

Matamá

et al. 2017

International Journal of Biological Macromolecules

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We selected 1235 decapeptides from human hair proteins encoded by human genes of keratins and keratin associated proteins. The peptides were linked to glass arrays and screened for their affinity towards a solution of human hair extracted keratin fraction. Based on the physicochemical properties of the peptides, ten variables were studied: content of different types of amino acid side chains (cysteine, hydrophobic, polar, basic, acidic, aromatic rings, amide, alcohol side chains), isoelectric point, and net charge. We found differences statistically significant on the binding affinity of peptides based on their content of cysteine, hydrophobic and polar amino acids, mainly containing alcohols. These results point to the formation of hydrophobic interactions and disulfide bonds between small peptides and human hair keratins as the main driving forces for the interaction of possible cosmetic peptides, namely designed to strength human hair. As so, our results enlighten the nature of the interaction of keratin based materials with human hair, which are claimed to enhance hair fiber strength, and enable a more directed and sustained hair care peptide design.

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“…Cyanines are a type of classical NIR fluorophores, [150][151][152][153][154][155][156] which have great potential for in vivo imaging. CCS probes with high signal/background ratio are rather suited for improving sensitivity, but the cyanine-based CCS probes are still scarce.…”

Section: Cyanine-based Ccs Probesmentioning

confidence: 99%

Spectroscopic probes with changeable π-conjugated systems

2012

Chem. Commun.

158

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Spectroscopic probes have been extensively investigated and used widely in many fields because of their powerful ability to improve analytical sensitivity, and to offer greater temporal and spatial resolution (in some cases a molecule event may be visualized by the naked eye). So far, different photophysical mechanisms, such as charge transfer, photo-induced electron transfer and fluorescent resonance energy transfer, have been employed to develop various spectroscopic probes with superior properties. However, these photophysical mechanisms depend on the energy levels of molecular orbitals, which are usually difficult to accurately determine. This would lead to the poor prediction of analytical performance of the designed probe. Instead, the change of π-conjugated systems induced by chemical reactions is often accompanied by a distinct alteration in spectroscopic signal, which is more predictable and is of high signal/background ratio. This mechanism can serve as an effective measure for developing excellent spectroscopic probes, but to our knowledge, has not been systematically summarized. In this feature article, we review the development of spectroscopic probes with changeable π-conjugated systems, which is catalogued according to the fluorochromes: fluorescein, rhodamine, spiropyran, squaraine, coumarin, cyanine, etc. Two main strategies for constructing these spectroscopic probes, including ring-closing reaction and nucleophilic addition reaction, are summarized, and the merits and limitations of the probes are discussed.

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Long-Wavelength and Near-Infrared Fluorescence: State of the Art, Future Applications, and Standards

Cited by 15 publications

References 37 publications

pH sensor based on upconverting luminescent lanthanide nanorods

pH sensor based on upconverting luminescent lanthanide nanorods

Peptide—protein interactions within human hair keratins

Spectroscopic probes with changeable π-conjugated systems

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