and solvatochromism studies of novel bis indolyl methanes bearing


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Synthesis and solvatochromism studies of novel bis(indolyl ....

The demand for dyes with solvatochromic properties has increased in the last few years, mainly due to their wide range of applications in the analytical and industrial fields, such as in the textile industry. The phenomenon of solvatochromism is associated with the differential solvation of the ground and ex

Publications Authored by Elisabete Oliveira | PubFac...

Are you Elisabete Oliveira? Register this Author. 42Publications. 576Reads. 44Profile Views. Emerging pollutants. II International Caparica conference on pollutant toxic ions and molecules 2nd PTIM-2017. Authors: Carlos Lodeiro José Luis Capelo Elisabete Oliveira Adrián Fernández-Lodeiro.

International Journal of Food Properties - Taylor & Franc...

indicates that the hydrophobic interaction, hydrogen bonds, and van der Waals forces played major roles in the complex formation process. The distance between donor and acceptor, obtained according to fluorescence resonance energy transfer and docking studies, indicated that BIM induced a change from a hydrophobic environment around the Trp-193 of ...

Characterization of Reversed-Phase Liquid Chromatographic ....

The solvatochromic method has been used to probe the solid/solution interface of bare silica and two modified silica surfacesphenyl bonded and C18 bondedin mobile-phase mixtures of methanol−water and acetonitrile−water. Spectral measurements of solvatochromic dye solutions in different mobile-phase compositions and of slurries wetted by these same solutions have been recorded and used to ...

From visible to far-red excitable chromophores derivatives ....

Read "From visible to far-red excitable chromophores derivatives of vitamin B6. Evaluation as pH-responsive probes and solvatochromic study, Dyes and Pigments" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

IJMS | Free Full-Text | Synthesis, X-ray Structure ....

A series of Schiff bases, salicylideneaniline derivatives 1–4, was synthesized under mild conditions and characterized by 1H NMR, HRMS, UV-Vis and fluorescence spectra, and single-crystal X-ray diffraction. In solid and aprotic solvents 1–4 exist mainly as E conformers that possess an intramolecular six-membered-ring hydrogen bond. A weak intramolecular C–H×××F hydrogen bond is also ...

(PDF) Novel approach to bis(indolyl)methanes: De novo ....

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Photochemical & Photobiological Sciences (v.13, #3) | www ....

Subsequently, a small and a large-scale screening study as well as several targeted studies found that few, selected anticancer therapeutic regimens are able to induce a promising kind of cancer cell demise called immunogenic cell death (ICD), which can activate the immune system owing to the spatiotemporally defined emission of danger signals.

Synthesis and solvatochromism studies of novel bis(indolyl ....

PDF | The demand for dyes with solvatochromic properties has increased in the last few years, mainly due to their wide range of applications in the analytical and industrial fields, such as in the ...

Novel approach to bis(indolyl)methanes: De novo synthesis ....

Bis(indolyl)methanes (BIMs) isolated from marine or terrestrial matrices exhibit a wide range of biological activities including anticancer activity against various types of tumour cells ().Naturally occurring BIMs such as vibrindole (1) are useful in the treatment of fibromyalgia, chronic fatigue, and irritable bowel syndrome , , .Furthermore, various studies point out that 3,3 ...

M MANUELA M RAPOSO | Researcher Profile | Symptoma.c...

M MANUELA M RAPOSO published 5 Research Articles on Check More at Symptoma.com

(PDF) From visible to far-red excitable chromophores ....

For example, the interstitial pH of malignant tumours is several studies, mainly due to their wide use in biochemistry, lower than in normal tissues, being this parameter used for diag- cellular biology and imaging, clinical diagnosis and drug discovery nosis and therapies [12]. [1e3].

Pyridinium N-phenolate betaine dyes as empirical ....

Solutions of the zwitterionic betaine dye 4-(2,4,6-triphenylpyridinium-1-yl)-2,6-di- phenylphenolate are solvatochromic, thermochromic, piezochromic, and halochromic. That means the position of its longest-wavelength intramolecular charge-transfer absorption band depends on solvent polarity, solution temperature, external pressure, and the nature and concentration of added salts.

Oxidized Bis(indolyl)methane: A Simple and Efficient ....

NaY Zeolite Functionalized by Sulfamic Acid/Cu(OAc) 2 as a Novel and Reusable Heterogeneous Hybrid Catalyst in Efficient Synthesis of Bis, Tris, and Tetrakis(indolyl)methanes, 3,4-Dihydropyrimidin-2(1 H )-ones, and 2-Aryl-1 H -benzothiazoles

Synthesis and solvatochromism studies of novel bis(indolyl ....

The strong hydrogen-bond donor capability of the indolyl group NH in bis-(indolyl)methanes can lead to an internal charge transfer (ICT) state, which is responsible for a wide range of colour changes. Thus, the hydrogen bonding ability of the indolyl group can be modulated by the donor H-atom diof

Simultaneous determination of mycophenolic acid and ....

The method is based on the pre‐column derivatization of valproic acid with 4‐bromomethyl‐6, 7‐dimethoxycoumarin (BrMMC) and online solvatochromism of MPA by pH adjustment. The linear calibration range was 0.50–30 µg/mL for MPA and 5.00–150 µg/mL for VPA.

AIE Based Coumarin Chromophore - Evaluation and ....

Abstract. A new class of red emitting extensively conjugated donor-π-acceptor type dyes bearing coumarin units have been synthesized by condensation of 7-(diethylamino)-2-oxo-2 H-chromene-3-carbaldehyde with different active methylenes.All the dyes are characterized by 1 H NMR, 13 C NMR and HRMS spectroscopy. The photophysical behaviour and the relation between structure and properties of the ...

Elisabete de Jesus Oliveira Marques – Research Output ....

https://orcid.org/0000-0002-8339-4820. Email [email protected]; 597 Citations; 14 h-Index

Synthesis and solvatochromism studies of novel bis(indolyl ....

The largest colour modifications were visualized for compound 2b, the solution colours of which are orange in DMSO, blue in trichloromethane, green in dichloromethane and purple in 1,4-dioxane. A negative solvatochromism was observed in 2b and positive one in 2a, 2c and 2d.Fundação para a Ciência e a Tecnologia (FCT

Universidade do Minho: Synthesis and solvatochromism ....

Fundação para a Ciência e a Tecnologia (FCT)

Publications Authored by Susana P G Costa | PubFac...

Novel alanines bearing a heteroaromatic side chain: synthesis and studies on fluorescent chemosensing of metal cations with biological relevance. Authors: Rosa Cristina M Ferreira Maria Manuela M Raposo Susana P G Costa. Amino Acids 2018 06 12;50(6):671-684. Epub 2018 Mar 12.