The photophysical properties of Nile red and Nile blue in ordered anisotropic media

Tajalli, H.; Gilani, A. Ghanadzadeh; Zakerhamidi, M.S.; Tajalli, Peyman

doi:10.1016/j.dyepig.2007.10.002

Cited by 91 publications

(59 citation statements)

References 27 publications

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“…NR possesses high uorescence quantum yields in lipids and unpolar solvents and is widely used in biological applications as a lipophilic stain or a laser dye. [20][21][22] Moreover, the pronounced emission solvatochromicity allows its use as polarity sensor in cellular environments. 23,24 Unfortunately, NR's water insolubility restricts its application to lipids and highly hydrophobic micro-environments.…”

Section: 19mentioning

confidence: 99%

Synthesis and optical properties of covalently bound Nile Red in mesoporous silica hybrids – comparison of dye distribution of materials prepared by facile grafting and by co-condensation routes

et al. 2016

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The fluorescence dye Nile Red (NR) can be covalently ligated to hexagonally ordered, mesoporous silica materials (MCM-41) via co-condensation and post grafting routes in order to investigate possible differences in the dye distributions. The obtained hybrid materials display emission properties similar to free NR but in contrast to free dye molecules even aqueous gels are luminescent, rendering these materials particularly interesting for biolabeling applications. All materials were structurally characterized by nitrogen sorption measurements, small angle X-ray scattering (SAXS), and transmission electron microscopy (TEM). Their optical properties were characterized by UV/Vis and fluorescence spectroscopy.

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Section: 19mentioning

confidence: 99%

Synthesis and optical properties of covalently bound Nile Red in mesoporous silica hybrids – comparison of dye distribution of materials prepared by facile grafting and by co-condensation routes

et al. 2016

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“…To resolve the three-dimensional director field, 5CB was doped with a small amount of the fluorescent dye Nile Red (Sigma Aldrich). The dye molecules, which align along the long molecular axis of 5CB (Tajalli et al 2008), thus trace the Fig. 1 a Anchoring angles, the azimuthal angle u and the zenithal angle h define the orientation of the LC molecule.…”

Section: Methodsmentioning

confidence: 99%

Functionalization of microfluidic devices for investigation of liquid crystal flows

Sengupta

Schulz

Ouskova

et al. 2012

Microfluid Nanofluid

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Systematic studies of thermotropic liquid crystals in confinement, such as liquid crystals in microfluidic channels, require control of the anchoring conditions on the surfaces. Especially for the case of uniform planar anchoring, the standard method involves a mechanical treatment (rubbing) of the surface that is not applicable to microfluidic devices. In the present study, we report methods for the achievement of well-defined anchoring conditions for liquid crystals in microfluidic channels consisting of polydimethylsiloxane and glass. Various physico-chemical techniques enable to establish homeotropic, degenerate planar, uniform planar, and hybrid anchoring conditions on the surface of the channel walls. We characterize the treated surfaces in terms of wettability and liquid crystal anchoring and determine the director field in the microchannels for the different anchoring configurations using polarizing optical microscopy and fluorescence confocal polarization microscopy. The relevance of the surface anchoring for the flow behavior of the liquid crystal in the microchannel is demonstrated by studying the onset of defect-mediated chaoticlike flow at high Ericksen numbers for the different anchoring cases.

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“…We found that the best results for dipole estimation come Table 2 Selected physical properties of the nematic liquid crystals at room temperature,n is the mean refractive index, and,ε is the mean dielectric constant, taken from Refs. [53][54][55][56][57][58].…”

Section: Correlation With Multi-parameter Solvent Polarity Scalementioning

confidence: 99%

Estimation of ground- and excited-state dipole moments of oxazine 1 in liquid and liquid crystalline media

Gilani¹,

Moghadam²,

Zakerhamidi³

2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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The photophysical properties of Nile red and Nile blue in ordered anisotropic media

Cited by 91 publications

References 27 publications

Synthesis and optical properties of covalently bound Nile Red in mesoporous silica hybrids – comparison of dye distribution of materials prepared by facile grafting and by co-condensation routes

Synthesis and optical properties of covalently bound Nile Red in mesoporous silica hybrids – comparison of dye distribution of materials prepared by facile grafting and by co-condensation routes

Functionalization of microfluidic devices for investigation of liquid crystal flows

Estimation of ground- and excited-state dipole moments of oxazine 1 in liquid and liquid crystalline media

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