Über einen alkalihochempfindlichen, zur Titration mit Hundertstelnormallösungen geeigneten Indicator

Rupp, E.; Loose, Roberta Fabricio

doi:10.1002/cber.19080410388

Cited by 22 publications

(5 citation statements)

References 2 publications

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“…[ 2 ] There are numerous approaches to obtain a large bathochromic shift in a chromophore, for example, by extending the core conjugation (e.g., cyanine dyes) [ 3 ] or by introducing a pair of electron‐donating (EDG) and electron‐withdrawing (EWG) groups, enabling a push–pull system. [ 4 ] Even though chemists have been employing these molecular design principles since the beginning of the 20th century—the azo scaffolds being the eminent contender [ 5 ] —significant advances are possible towards multimodal imaging probes, when the chromophore design allows simultaneous reporting of even slight changes of its local microenvironment (e.g., polarity, viscosity, etc.). [ 6 ] For example, Ogilby and coworkers used a porphyrin dimer to photo‐induce cell death caused by singlet oxygen, while reporting the intracellular viscosity.…”

Section: Introductionmentioning

confidence: 99%

A Modular Fluorescent Probe for Viscosity and Polarity Sensing in DNA Hybrid Mesostructures

et al. 2020

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There exists a critical need in biomedical molecular imaging and diagnostics for molecular sensors that report on slight changes to their local microenvironment with high spatial fidelity. Herein, a modular fluorescent probe, termed StyPy, is rationally designed which features i) an enormous and tunable Stokes shift based on twisted intramolecular charge transfer (TICT) processes with no overlap, a broad emission in the far‐red/near‐infrared (NIR) region of light and extraordinary quantum yields of fluorescence, ii) a modular applicability via facile para‐fluoro‐thiol reaction (PFTR), and iii) a polarity‐ and viscosity‐dependent emission. This renders StyPy as a particularly promising molecular sensor. Based on the thorough characterization on the molecular level, StyPy reports on the viscosity change in all‐DNA microspheres and indicates the hydrophilic and hydrophobic compartments of hybrid DNA‐based mesostructures consisting of latex beads embedded in DNA microspheres. Moreover, the enormous Stokes shift of StyPy enables one to detect multiple fluorophores, while using only a single laser line for excitation in DNA protocells. The authors anticipate that the presented results for multiplexing information are of direct importance for advanced imaging in complex soft matter and biological systems.

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Section: Introductionmentioning

confidence: 99%

A Modular Fluorescent Probe for Viscosity and Polarity Sensing in DNA Hybrid Mesostructures

et al. 2020

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“…On heating to 40-60 ºC Addition of an aniline or a phenol to diazotised AA gives diazo-coupling. An example of this is the preparation of the diazo dye Methyl Red (18) from diazotised AA and N,N-dimetylaniline [91]. The tellurium compound 19, and its non ring-closed analogues, has been prepared by treatment of diazotised AA with Na 2 Te [92].…”

Section: Diazotisationmentioning

confidence: 99%

The Chemistry of Anthranilic Acid

Wiklund¹,

Bergman

2006

COS

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“…Their method led to numerous other new procedures, that differed from each other mostly in the use of newer indicators and buffer solutions. Methyl red which is widely used was introduced in 1908 by E. Rupp and R. Loose (12); the sulfonephthaleins, which are especially suited to pH determinations because of their numerous color changes, were introduced by H. A. Lubs and W. M. Clark (13) in 1915.…”

Section: Synthetic Indicatorsmentioning

confidence: 99%