Photophysical properties of a surfactive long-chain styryl merocyanine dye as fluorescent probe

Ismail, L.F.M.

doi:10.1016/j.jlumin.2012.01.048

Cited by 9 publications

(2 citation statements)

References 80 publications

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“…[4] While such achange in structure might be expected as aconsequence of the confinement between the layers,t he increase in the emission quantum yield is somewhat surprising.T he dye bromide salt shows aphotoluminescence quantum yield (QY) of 3%,while the QY for the crystalline ordered interstratified heterostructured powder and the delaminated double stacks increases to 11 %and 7%,respectively.Comparable improvement of the QY was obtained for as imilar stilbazolium compound after microencapsulation in micelles,w here tor-sional motions and nonradiative relaxation from the excited to the ground state are reduced. [11] Indeed, the confinement between the silicate layers might well impose restrictions on changes in the geometry of the luminescent molecule upon atransition between these states.T hese restrictions might be responsible for the increased QY observed.…”

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Encapsulation of Functional Organic Compounds in Nanoglass for Optically Anisotropic Coatings

et al. 2015

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A novel approach is presented for the encapsulation of organic functional molecules between two sheets of 1 nm thin silicate layers, which like glass are transparent and chemically stable. An ordered heterostructure with organic interlayers strictly alternating with osmotically swelling sodium interlayers can be spontaneously delaminated into double stacks with the organic interlayers sandwiched between two silicate layers. The double stacks show high aspect ratios of >1000 (typical lateral extension 5000 nm, thickness 4.5 nm). This newly developed technique can be used to mask hydrophobic functional molecules and render them completely dispersible in water. The combination of the structural anisotropy of the silicate layers and a preferred orientation of molecules confined in the interlayer space allows polymer nanocomposite films to be cast with a well-defined orientation of the encapsulated molecules, thus rendering the optical properties of the nanocoatings anisotropic.

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Encapsulation of Functional Organic Compounds in Nanoglass for Optically Anisotropic Coatings

et al. 2015

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“…Zwar ist durch die Einlagerung im Zwischenschichtraum eine Änderung in der räumlichen Struktur zu erwarten, aber es überrascht, dass dies mit einer Zunahme der Quantenausbeute (QA) einhergeht: Die QA steigt gegenüber dem Farbstoffbromidsalz von 3 % beim geordnet wechselgelagerten Pulver auf 11 % und bei den delaminierten Doppelschichten auf 7 % an. Eine ähnliche Steigerung der QA wurde nach Mikroverkapselung eines vergleichbaren Stilbazoliumfarbstoffs in Mizellen beobachtet, in denen Torsionsbewegungen behindert werden und damit die strahlungslose Relaxation vom Anregungs‐ in den Grundzustand eingeschränkt wird 11. Auf ähnliche Weise könnte die Verkapselung des Farbstoffs zwischen den Silicatschichten wirken: Eine sterische Einschränkung von Strukturänderungen, die zwischen den unterschiedlichen Anregungszuständen auftreten, könnte den Anstieg der QA nach der Verkapselung erklären.…”

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Nanoglas‐Verkapselung funktionaler organischer Verbindungen für optisch anisotrope Beschichtungen

et al. 2015

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Novel Thiazole Based Styryl Dyes with Benzimidazole Unit - Synthesis, Photophysical and TD-DFT Studies

Tayade

Sekar

2016

J Fluoresc

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Three new Y-shaped styryl dyes were designed and synthesized from thiazole carbaldehyde with different active methylene compounds as acceptor moieties. All the dyes were characterized by IR, HNMR, MS/LCMS/HRMS. Spectroscopic properties and non-linear optical properties styryl derivatives were analyzed and the effect of change in solvent polarity on their absorption and emissive properties has been investigated. The dye with (1-phenylethylidene) propanedinitrile unit shows red shift absorption/emission profile among all the dyes. Density Functional Theory and Time Dependent-Density Functional Theory computations have been used for comparative study with the experimental data and also to understand the structural, molecular, electronic and photophysical parameters of the styryl dyes. The computational method was also employed to investigate the nonlinear optical properties of the styryl dyes in different organic solvent. The unsubstituted benzimidazolyl thiazole styryl dyes possess good non-linear optical properties.

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Photophysical properties of a surfactive long-chain styryl merocyanine dye as fluorescent probe

Cited by 9 publications

References 80 publications

Encapsulation of Functional Organic Compounds in Nanoglass for Optically Anisotropic Coatings

Encapsulation of Functional Organic Compounds in Nanoglass for Optically Anisotropic Coatings

Nanoglas‐Verkapselung funktionaler organischer Verbindungen für optisch anisotrope Beschichtungen

Novel Thiazole Based Styryl Dyes with Benzimidazole Unit - Synthesis, Photophysical and TD-DFT Studies

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