Fluorescence probes as molecular weight detectors of polymers

Al-Hassan, Khader A.; Meetani, Mohammed A.; Said, Ziad

doi:10.1007/bf02758242

Cited by 10 publications

(18 citation statements)

References 22 publications

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“…Systems responsive to structural fixation can also be of technical relevance for research on organic‐light‐emitting diodes (OLEDs) when conductive polymers are chosen . In the context of the present study, it is of particular relevance that the S 1 emission bands of TICT molecules in polymer films are suppressed as explicitly shown within a PMMA matrix of sufficient molecular weight …”

Section: Figurementioning

confidence: 96%

Control of Excited‐State Conformations in B,N‐Acenes

Quanz

Ruhl

et al. 2019

Angew Chem Int Ed

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We present a new concept to control the conformations of molecules in the excited state through harvesting negative hyperconjugation. The strategy was realized with the 2,3,1,4‐benzodiazadiborinane scaffold, which was prepared by a new synthetic procedure. Photochemical studies identified dual light emission, which was assigned to well‐defined conformers. The emission at longer wavelength can be switched off by restricting the rotational degrees of freedom in the solid state as well as by controlling the energy levels of the excited states through adjusting the solvent polarity.

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Section: Figurementioning

confidence: 96%

Control of Excited‐State Conformations in B,N‐Acenes

Quanz

Ruhl

et al. 2019

Angew Chem Int Ed

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“…[40,41] In the context of the present study,itisofparticular relevance that the S 1 emission bands of TICT molecules in polymer films are suppressed [42,43] as explicitly shown within aPMMA matrix of sufficient molecular weight. [44] Figure 2. Comparison of the absorption and emission spectra of 3f and the carbon-isosteric naphthalene derivative.…”

Section: Angewandte Chemiementioning

confidence: 99%

Control of Excited‐State Conformations in B,N‐Acenes

Quanz

Ruhl

et al. 2019

Angewandte Chemie

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“…Scheme 2). 1,6,[16][17][18][19][20][21][22][23][24][25] The formation of inclusion complex with b-CD results in fluorescence enhancement and increased solubility of warfarin. 21 The reported values for the binding constants between warfarin and b-CD range from 99.8 M À1 to 633 M À1 .…”

Section: Introductionmentioning

confidence: 98%

Fluorescence enhancement of warfarin induced by interaction with β‐cyclodextrin

Vasquez

Schultz

et al. 2009

Biotechnology Progress

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Warfarin is the most common agent used for control and prevention of venous as well as arterial thromboembolism (blood clots). In aqueous media, warfarin forms inclusion complexes with a family of cyclic oligosaccharides, alpha, beta, gamma-cyclodextrins (CD). The formation of these complexes results in enhancement of the fluorescence of warfarin. Such spectroscopic changes offer a venue for the development of bioanalytical methodologies for warfarin quantification in biological liquids. We characterized the photophysical properties of warfarin in solvents with varying polarity and viscosity. The fluorescence quantum yield of warfarin correlated: (1) strongly with the solvent viscosity (R = 0.979) and (2) weakly with the solvent polarity (R = 0.118). These findings indicate that it is the change of the viscosity, rather than polarity, of the microenvironment that causes the fluorescence enhancement of warfarin upon binding to beta-CD. Utilizing the observed fluorescence enhancement in fluorescence titration measurements, the binding constants of warfarin to beta-CD were obtained (2.6 x 10(2) M(-1)-3.7 x 10(2) M(-1)). Using multivariable linear analysis, we extracted the stoichiometry of warfarin-beta-CD interaction (1:1).

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Fluorescence probes as molecular weight detectors of polymers

Cited by 10 publications

References 22 publications

Control of Excited‐State Conformations in B,N‐Acenes

Control of Excited‐State Conformations in B,N‐Acenes

Control of Excited‐State Conformations in B,N‐Acenes

Fluorescence enhancement of warfarin induced by interaction with β‐cyclodextrin

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