Welcome to LookChem.com Sign In|Join Free

CAS

  • or

19249-03-7

Post Buying Request

19249-03-7 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

19249-03-7 Usage

Description

Tos-PEG4-Tos is a PEG linker containing two tosyl groups. The hydrophilic PEG spacer increases solubility in aqueous media. The tosyl group is a very good leaving group for nucleophilic substitution reactions.

Chemical Properties

WHITE POWDER

Uses

Tri(ethylene glycol) di-p-toluenesulfonate is used in the synthesis of 1-[4-(1,4,7,10-tetraoxa-13-aza-cyclopentadec-13-yl)-phenyl] ethanone.

Check Digit Verification of cas no

The CAS Registry Mumber 19249-03-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,2,4 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 19249-03:
(7*1)+(6*9)+(5*2)+(4*4)+(3*9)+(2*0)+(1*3)=117
117 % 10 = 7
So 19249-03-7 is a valid CAS Registry Number.
InChI:InChI=1/C20H26O8S2/c1-17-3-7-19(8-4-17)29(21,22)27-15-13-25-11-12-26-14-16-28-30(23,24)20-9-5-18(2)6-10-20/h3-10H,11-16H2,1-2H3

19249-03-7 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • Alfa Aesar

  • (B23279)  Tri(ethylene glycol) di-p-toluenesulfonate, 98%   

  • 19249-03-7

  • 10g

  • 499.0CNY

  • Detail
  • Alfa Aesar

  • (B23279)  Tri(ethylene glycol) di-p-toluenesulfonate, 98%   

  • 19249-03-7

  • 50g

  • 1774.0CNY

  • Detail
  • Alfa Aesar

  • (B23279)  Tri(ethylene glycol) di-p-toluenesulfonate, 98%   

  • 19249-03-7

  • 250g

  • 6684.0CNY

  • Detail
  • Aldrich

  • (339032)  Triethyleneglycoldi(p-toluenesulfonate)  98%

  • 19249-03-7

  • 339032-10G

  • 1,254.24CNY

  • Detail

19249-03-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name 2-[2-[2-(4-methylphenyl)sulfonyloxyethoxy]ethoxy]ethyl 4-methylbenzenesulfonate

1.2 Other means of identification

Product number -
Other names triethylene glycol bis(4-toluenesulfonate)

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:19249-03-7 SDS

19249-03-7Relevant articles and documents

Synthesis and characterisation of schiff base macrocyclic Pb(II), zn(ii), Cd(II) and La(III) complexes by template reaction of (±)-trans-1,2- diaminocyclohexane with metal nitrates and salicylaldehyde derivatives

Ilhan, Salih

, p. 766 - 769 (2009)

Eight macrocyclic complexes have been synthesised by template reaction of (±)-trans-1,2-diaminocyclohexane with metal nitrates and 1,10-bis(2-formylphenyl)-1,4,7,10-tetraoxadecane or 1,7-bis(2-formylphenyl)-1,4, 7-trioxaheptane, and their structures are proposed on the basis of elemental analysis, FT-IR, UV-Vis, molar conductivity measurements, 1H The complexes NMR and mass spectra. The metal-to-ligand molar ratios are 1:1 in the complexes, which are 1:2 electrolytes for Pb(II), Cd(II) and Zn(II) and 1:3 electrolytes for La(III).

A multi-responsive crown ether-based colorimetric/fluorescent chemosensor for highly selective detection of Al3+, Cu2+ and Mg2+

Zhang, Qiang,Ma, Ruifang,Li, Zhuying,Liu, Zizhong

, (2020)

A novel multi-response chemosensor L based on coumarin-chalcone-crown ether was designed and synthesized, which exhibited a high selectivity for the colorimetric detecting Al3+ and Cu2+ and fluorescent recognizing Al3+ and Mg2+ in ethanol. L can monitor Al3+ and Cu2+ via distinct color changes from a slight yellow to pink and to orange, respectively. The sensor L can also monitor Al3+ and Mg2+ by fluorescence emission responses at 592 nm and 547 nm with low detection limits of 0.31 μM and 0.23 μM, respectively. The selectivity of L toward Al3+, Cu2+ and Mg2+ was not interfered by a large number of coexisting ions and was found to be reversible. By means of spectrometric titration, Job's plot, mass spectrometry, 1H NMR titration and IR spectroscopy analysis, it was unanimously confirmed that the sensor L had a stoichiometric ratio of 1:1 with Cu2+ and Mg2+, and 1:2 with Al3+. The order of the stability of the complexes formed by L and Al3+, Cu2+, Mg2+ was as follows: L-Al3+ > L-Cu2+ > L-Mg2+. At the same time, some possible bonding modes and sensing mechanisms were further proposed, and the optimized structure of the sensor L and its sensing mechanism for Al3+, Cu2+ and Mg2+ were confirmed by the calculations of DFT/B3LYP and TD-DFT methods in a suite of Gaussian 09 programs.

Metal ion chemosensors based on diaza-18-crown-6 coupling with azobenzene dye

Koonrugsa, Narongsak,Fuangswasdi, Saowarux

, p. 15 - 23 (2019)

Novel naked-eye cation-selective chemosensors were developed from derivatives of diaza-18-crown-6 bearing one or two azobenzenes functionalized with o-acetic acid or p-nitro groups. The chromogenic acid and nitro derivatives exhibited solvatochromic effects with a majority of quinone-hydrazone tautomer in DMSO. The study of sensing properties of all molecules towards several metal ions showed that the one and two nitro-bearing N1 and N2 derivatives responded selectively to Cr3+ in MeCN with a color change from pink to colorless. They also showed selectivity for Hg2+ in DMSO with a color change from purple to light yellow. The detection limit of N1 and N2 that render visual difference to the naked eye are 0.21 ppm and 0.31 ppm for Cr3+ in MeCN, and 1.20 ppm and 1.00 ppm for Hg2+ in DMSO, while that obtained from 3σ method are 0.08 ppm and 0.03 ppm for Hg2+ in DMSO. These results demonstrate a potential use of p-nitro azobenzene diaza-18-crown-6 as naked-eye sensors, notably for Cr3+ that brings acute toxic to aquatic life.

Sodium-Selective Fluoroionophore-Based Optodes for Seawater Salinity Measurement

Müller, Bernhard J.,Rappitsch, Tanja,Staudinger, Christoph,Rüschitz, Christian,Borisov, Sergey M.,Klimant, Ingo

, p. 7195 - 7202 (2017)

A new fluorescent sensor for Na+ is presented. The sensor relies on a Na+ selective fluoroionophore based on a bright red-emitting BODIPY chromophore. The fluorescence of the fluoroionophore is enhanced upon binding of Na+-ions to the highly selective aza-crown ether receptor due to reduction of the photoinduced electron transfer (PET) quenching. Solid state sensing materials were prepared by physically embedding the fluoroionophore into water-swellable biocompatible polymer matrices (polyurethane hydrogels), thus enabling continuous measurements of aqueous samples. Despite the simple design, the sensor showed no leaching of the indicator and featured fast and reversible response. Among different polyurethane hydrogels investigated, the hydrogel D1 featuring the highest water uptake was found to be the most suitable due to the highest dynamics between "off" and "on" states. Due to little or no cross sensitivity to other ions (e.g., Mg2+, Ca2+, K+) and its insensitivity to potential changes in pH, this sensor is promising for use in clinical diagnostics and for biological and marine applications. Fiber-optic sensors based on referenced read-out with a compact phase fluorimeter were prepared. To demonstrate their practical applicability, the sensors were used to determine the salinity in the seawater and brackish water of the Baltic Sea.

Displacement assay detection by a dimeric lanthanide luminescent ternary Tb(iii)-cyclen complex: High selectivity for phosphate and nitrate anions

Caffrey, David F.,Gunnlaugsson, Thorfinnur

, p. 17964 - 17970 (2014)

The luminescent dimeric ternary lanthanide-cyclen complexes (2-(Ln.1)2; Ln = Tb/Eu) were designed and both their self-assembly formation and their ability to detect anions via displacement assays were investigated using spectrophotometric titrations in MeOH solution. The formation of 2-(Tb.1)2 and 2-(Eu.1)2 was investigated in solution, and determination of the binding constants and stoichiometry showed that the former was formed almost exclusively over the 1 1 complex 2-(Tb.1) after the addition of two equivalents of 2; while for 2-(Eu.1)2 a mixture of both stoichiometries existed even after the addition of four equivalents of 2. Of these two systems, 2-(Tb.1)2 was studied in details as a probe for anions, where significant changes where observed in the photophysical properties of the complex; with the characteristic Tb(iii)-centred emission being fully switched off upon the sensing of phosphates and nitrate, giving rise to the formation of a H2PO4-:Tb.1 complex in a 1 2 stoichiometry upon sensing of H2PO4- by 2-(Tb.1)2, while NO3- gave 1 1 complex formation and two equivalents of NO3-·Tb.1.

Fluorescence emission enhancement of a T-shaped benzimidazole with a mechanically-interlocked ‘suit’

Xu, Houyang,Lin, Meng-Di,Yuan, Jun,Zhou, Baiyang,Mu, Yingxiao,Huo, Yanping,Zhu, Kelong

supporting information, p. 3239 - 3242 (2021/04/06)

A fluorescent T-shaped benzimidazole was successfully designed and interlocked in a bicyclic macrocycle to form a suit[1]ane through supramolecular templated-synthesis. Compared with the bare fluorophore, suit[1]ane requires nearly two times the concentration to initialize the aggregation-caused quenching effect in solution. Furthermore, an 8-fold higher solid-state fluorescence quantum yield (21.7%) is also achieved. By taking advantage of mechanical bonding and molecular packing, such fluorescence emission enhancement through formation of a suitane opens the way to new complex fluorescent materials.

DINUCLEATING LIGAND OR DINUCLEAR METAL COMPLEX

-

Paragraph 0040-0041, (2021/03/19)

To provide a metal complex that has high cancer cell toxicity and has DNA target and cyclen.SOLUTION: The present disclosure provides a dinuclear metal complex represented by the following formula (IV).SELECTED DRAWING: None

Isosteviol amphiphilic derivative and preparation method thereof

-

Paragraph 0029-0030, (2021/04/10)

The invention discloses structures of isosteviol amphiphilic derivatives and a preparation method of the isosteviol amphiphilic derivatives, and belongs to the technical field of supramolecular chemistry. The compound is based on a natural product isosteviol, the nineteenth position of the compound is connected with a polyether chain, and the ends of the compound are different quaternary ammonium salts; the structural formula of the compound is shown in figure 1, wherein R is pyridine quaternary ammonium salt, imidazole quaternary ammonium salt and the like.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 19249-03-7