Studies on the synthesis and thermochromic properties of crystal violet lactone and its reversible thermochromic complexes

2005 ◽  
Vol 425 (1-2) ◽  
pp. 7-12 ◽  
Author(s):  
C.F. Zhu ◽  
A.B. Wu
Keyword(s):  
Crystal Violet ◽  
Thermochromic Properties

Control of thermochromic behaviour in crystal violet lactone (CVL)/alkyl gallate/alcohol ternary mixtures

2015 ◽  
Vol 93 (1) ◽  
pp. 22-31 ◽  
Author(s):  
Alexander N. Bourque ◽  
Mary Anne White
Keyword(s):  
Solid State ◽  
Crystal Violet ◽  
Alkyl Chain ◽  
Ternary Mixtures ◽  
Slow Heating ◽  
Solvent Interaction ◽  
Alkyl Gallates ◽  
Heating And Cooling ◽  
Thermochromic Properties ◽  
Chain Lengths

Three-component thermochromic mixtures generally consist of a leuco dye, a phenolic colour developer, and a high-melting organic solvent (listed in order of increasing mass). Their colouring behaviour is controlled by competing binary interactions, with the dye–developer interaction responsible for colour formation and the developer–solvent interaction responsible for solid-state colour erasure. In the present study, the reversible thermochromic properties of twelve systems of three-component mixtures comprising crystal violet lactone (CVL, dye), one of four alkyl gallates (developer), and one of three long-chain alkyl alcohols (solvent) were examined, as bulk samples, with slow heating and cooling rates. The thermochromic behaviour (i.e., melt-lightened vs melt-darkened thermochromism) of these mixtures was examined as a function of the difference in length of the alkyl chains attached to the developer and solvent. When the alkyl chain lengths were well-matched, the developer–solvent interaction dominated in the solid state and melt-darkened thermochromism was observed. When the alkyl chain lengths were poorly matched, the dye–developer interaction dominated in the solid state, and melt-lightened thermochromism was observed. Ternary thermochromic phase diagrams define compositional regions of optimal thermochromic behaviour (i.e., demonstrating high colour contrast), showing the intricate balance between developer–dye and developer–solvent interactions, and component concentration, in determining thermochromic behaviour.

On-Demand Guest Release from MOF-5 Sealed with Nitrophenylacetic Acid Photocapping Groups

2019 ◽  
Author(s):  
Jingjing Yan ◽  
Rick Homan ◽  
Corrianna Boucher ◽  
Prem N. Basa ◽  
Katherine Fossum ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Crystal Violet ◽  
Dye Molecules ◽  
Phenyl Acetic Acid ◽  
On Demand ◽  
Crystal Violet Dye ◽  
Dye Diffusion ◽  
Triphenylacetic Acid

Recently, we demonstrated that triphenylacetic acid could be used to seal dye molecules within MOF-5, but guest release required digestion of the framework by treatment with acid. We prepared the sterically bulky photocapping group [bis-(3-nitro-benzyl)-amino]-(3-nitro-phenyl)-acetic acid (PC1) can prevent Crystal violet dye diffusion from inside MOF-5 until removed by photolysis.

On-Demand Guest Release from MOF-5 Sealed with Nitrophenylacetic Acid Photocapping Groups

2019 ◽  
Author(s):  
Jingjing Yan ◽  
Rick Homan ◽  
Corrianna Boucher ◽  
Prem N. Basa ◽  
Katherine Fossum ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Crystal Violet ◽  
Dye Molecules ◽  
Phenyl Acetic Acid ◽  
On Demand ◽  
Crystal Violet Dye ◽  
Dye Diffusion ◽  
Triphenylacetic Acid

Recently, we demonstrated that triphenylacetic acid could be used to seal dye molecules within MOF-5, but guest release required digestion of the framework by treatment with acid. We prepared the sterically bulky photocapping group [bis-(3-nitro-benzyl)-amino]-(3-nitro-phenyl)-acetic acid (PC1) can prevent Crystal violet dye diffusion from inside MOF-5 until removed by photolysis.

A KINETIC MODEL FOR THE CRYSTAL VIOLET MINERALIZATION IN WATER BY THE ELECTRO- FENTON PROCESS

2008 ◽  
Vol 7 (1) ◽  
pp. 9-12 ◽  
Author(s):  
Ilie Siminiceanu ◽  
Carmen-Ionela Alexandru ◽  
Eric Brillas
Keyword(s):  
Kinetic Model ◽  
Crystal Violet ◽  
Fenton Process

Understanding of the mechanism of crystal violet adsorption on modified halloysite: hydrophobicity, performance, and interaction

2021 ◽  
pp. 125656
Author(s):  
Kheira Belkassa ◽  
Mounir Khelifa ◽  
Isabelle Batonneau-Gener ◽  
Kheira Marouf-Khelifa ◽  
Amine Khelifa
Keyword(s):  
Crystal Violet

Using infrared luminescence to study crystal violet lactone in carbonless papers

2021 ◽  
Author(s):  
Silvia Stašková ◽  
Milena Reháková ◽  
Michal Oravec ◽  
Andrea Jabconová
Keyword(s):  
Crystal Violet ◽  
Infrared Luminescence

scholarly journals Green synthesis of magnetic α–Fe2O3 nanospheres using Bridelia retusa leaf extract for Fenton-like degradation of crystal violet dye

2021 ◽  
Author(s):  
Raja Selvaraj ◽  
Shraddha Pai ◽  
Gokulakrishnan Murugesan ◽  
Sadanand Pandey ◽  
Ruchi Bhole ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Green Synthesis ◽  
Crystal Violet ◽  
Leaf Extract ◽  
Bet Analysis ◽  
Crystal Violet Dye ◽  
Pros And Cons ◽  
Manufacturing Techniques ◽  
The Stability ◽  
Bridelia Retusa

AbstractThe reach of nanotechnology has permeated into a range of disciplines and systematically revolutionized many manufacturing techniques. Today, nanoparticles are fabricated using varied approaches, each with its pros and cons. Of them, the green synthesis approach has been very effective in terms of overall economics and the stability of nanoparticles. The current study investigates the use of the leaf extract of Bridelia retusa for the synthesis of iron oxide nanoparticles. Typical of these nanoparticles, no specific peak was discernible on employing UV–visible spectroscopy. The size, morphological features, and crystallinity of the nanoparticles were determined by employing scanning electron microscopy and electron diffraction spectroscopy. Almost uniformly sized at 38.58 nm, the nanoparticles were spherical, constituting elemental iron at 11.5% and elemental oxygen at 59%. Their relative composition confirmed the nanoparticles to be iron oxide. X-ray diffraction studies showed the particles to be hexagonal and rhombohedral, estimating the crystallite size at 24.27 nm. BET analysis put the pore volume at 0.1198 cm3/g and pore diameter at 7.92 nm. The unique feature of the nanoparticles was that the specific surface area was 75.19 m2/g, which is more than 12 times higher than commercial α-Fe2O3. The participation of a variety of biochemicals in the leaf extract towards the reduction-cum-stabilization was confirmed using FTIR analysis. The Fenton-like catalytic activity of the nanoparticles was put to test by attempting to degrade crystal violet dye, which was completely achieved in 270 min. The kinetics of the degradation was also modelled in the study.

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