A reactive primary fluorescence switch-on sensor for Hg 2+ and the generated fluorophore as secondary recognition receptor toward Cu 2+ in aqueous acetonitrile solution

2017 ◽  
Vol 343 ◽  
pp. 7-16 ◽  
Author(s):  
Srimanta Manna ◽  
Parthasarathi Karmakar ◽  
Kalipada Maiti ◽  
Syed Samim Ali ◽  
Debasish Mandal ◽  
...  
Keyword(s):  
Acetonitrile Solution ◽  
Aqueous Acetonitrile ◽  
Fluorescence Switch ◽  
Primary Fluorescence ◽  
Recognition Receptor

Effect of water concentration on photoreduction of anthraquinone-2-sulfonate by 2-propanol in aqueous acetonitrile solution

1987 ◽  
Vol 91 (26) ◽  
pp. 6547-6551 ◽  
Author(s):  
Akihiro. Wakisaka ◽  
Thomas W. Ebbesen ◽  
Hirochika. Sakuragi ◽  
Katsumi. Tokumaru
Keyword(s):  
Water Concentration ◽  
Acetonitrile Solution ◽  
Aqueous Acetonitrile ◽  
Effect Of Water

Synthesis and Application of 1-[2-methyl-5-(4-hydroxymethylphenyl)-3-thienyl]-2-[2-methyl-5-(4-azidomethylphenyl)-3-thienyl]perfluorocyclopentene

2014 ◽  
Vol 1078 ◽  
pp. 110-113
Author(s):  
Le Le Ma ◽  
Hong Yan Xu ◽  
Qing Zhang ◽  
Gang Liu
Keyword(s):  
Fluorescence Intensity ◽  
Optoelectronic Properties ◽  
Acetonitrile Solution ◽  
Fluorescent Switch ◽  
Closed Ring ◽  
Fluorescence Switch ◽  
Open Ring

A new fluorescent switch based on a photochromic diarylethene, 1-[2-methyl-5-(4-hydroxymethylphenyl)-3-thienyl]-2-[2-methyl-5-(4-azidomethylphenyl)-3-thienyl] perfluorocyclopentene has been synthesized, And its properties have been discussed systematically in acetonitrile solution and in PMMA, such as photochromic, fluorescence switch and kinetics experiments, and its optoelectronic properties, The results showed that this compound exhibited reversible photochromism and the maxima absorption of compound closed-ring isomer 1c is 590 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers.

scholarly journals Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 409 ◽  
Author(s):  
Jing Li ◽  
Keliang Wang ◽  
Minglei Lian ◽  
Zhi Li ◽  
Tingzhao Du
Keyword(s):  
Acetonitrile Solution ◽  
Optimum Process ◽  
Total Annual Cost ◽  
Heat Integration ◽  
Reflux Ratio ◽  
Water Mixture ◽  
Aqueous Acetonitrile ◽  
Design Variables ◽  
Pressure Swing ◽  
Pressure Swing Distillation

The separation of aqueous acetonitrile solution by pressure swing distillation (PSD) was simulated and optimized through Aspen Plus software. The distillation sequence of the low pressure column (LPC) and high pressure column (HPC) was determined with a phase diagram. The pressures of the two columns were set to 1 and 4 atm, respectively. Total annual cost (TAC) was considered as the objective function, and design variables, such as the tray number, the reflux ratio, and the feeding position, were optimized. The optimum process parameters were obtained. For the reduction of energy consumption, the PSD with full-heat integration was designed. The TAC of this method is lower by 32.39% of that of the PSD without heat integration. Therefore, it is more economical to separate acetonitrile and water mixture by PSD with full-heat integration, which provides technical support for the separation design of such azeotropes.

Aminomethylpyrene-based imino-phenols as primary fluorescence switch-on sensors for Al3+ in solution and in Vero cells and their complexes as secondary recognition ensembles toward pyrophosphate

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 81203-81211 ◽  
Author(s):  
Ajit Kumar Mahapatra ◽  
Syed Samim Ali ◽  
Kalipada Maiti ◽  
Saikat Kumar Manna ◽  
Rajkishor Maji ◽  
...  
Keyword(s):  
Vero Cells ◽  
Ion Sensing ◽  
Fluorescence Switch ◽  
Primary Fluorescence

Three aminomethylpyrene-based salicyl-imines, viz.L1, L2 and L3 were designed and synthesized for Al3+ ion sensing.

Poly (SNS) Quantitative Electrosynthesis and Electrodissolution

1993 ◽  
Vol 328 ◽  
Author(s):  
T. F. Otero ◽  
E. Brillas ◽  
J. Carrasco ◽  
A. Figueras
Keyword(s):  
Conducting Polymers ◽  
Thick Films ◽  
Industrial Applications ◽  
Cathodic Reduction ◽  
Acetonitrile Solution ◽  
Aqueous Acetonitrile ◽  
Acetonitrile Solutions

ABSTRACTThe electrogeneration and electrodissolution of poly (SNS) have been improved by using aqueous acetonitrile solutions having a 1% (ν/ν) of water constant. Compact, adherent and thick films (until 0.4 Mg cm-2) were galvanostatically electrogenerated. The electrodeposited (oxidized) polymer is insoluble in 0.1 M L?CIO4 aqueous acetonitrile solution and solubilizes by cathodic reduction. Both, electrogeneration and electrodissolution, are faradaic processes. Those facts mimic electrodeposition and electroerosion of metals and their concomitant industrial applications. New technological possibilities using polymers in electrophotography, electroreprography, electropolishing, electro-erosion and electromachining are open through polymeric electrodissolution altogether to a new processible way, through the obtained solution, for the conducting polymers.

Spectrofluorometric Assay of Thiamine Hydrochloride in Injections and Multivitamin Preparations

1988 ◽  
Vol 71 (6) ◽  
pp. 1131-1133
Author(s):  
Abdel-Maboud I Mohamed ◽  
Samiha A Hussein ◽  
Salwa R El-Shabouri
Keyword(s):  
B Vitamins ◽  
Acetonitrile Solution ◽  
Thiamine Hydrochloride ◽  
Fluorescent Product ◽  
Aqueous Acetonitrile ◽  
Spectrofluorometric Method

Abstract A spectrofluorometric method is described for the determination of thiamine hydrochloride. The method is based on formation of a fluorescent product by oxidation of thiamine HC1 with 2,3,5,6-tetrabromo- l,4-benzoquinone in aqueous acetonitrile solution. The reaction product is stable for at least 6 h and shows excitation and emission maxima around 355 and 420 nm, respectively. The method is highly selective for thiamine HC1 in the presence of other B vitamins. Thiamine HC1 can be determined at concentrations as low as 20-160 ng/ mL of the final solutions. When the method was applied to the determination of thiamine HC1 added to some commercially available multivitamin preparations, recoveries were 98.78-99.98%

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