The Aggregation of Dichlorobis(<i>N</i>-hexylethylenediamine)zinc(II) in Water and Water/Chloroform Mixed Solvents

Iida, Masayasu; Asayama, Keiko; Ohkawa, Shiho

doi:10.1246/bcsj.75.521

Cited by 13 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chloroform, dichloromethane, methanol, and 1,4‐dioxane were guaranteed grades supplied by Wako Pure Chemical Industries. Chloroform was purified as previously reported 11d. Dichloromethane was dried with calcium chloride and then distilled; the water content was < 1 × 10 −3 %.…”

Section: Methodsmentioning

confidence: 99%

Formation of Thermotropic and Lyotropic Liquid Crystals of Bis(N‐alkylethylenediamine)silver(I) Nitrate

et al. 2004

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

Formation of Thermotropic and Lyotropic Liquid Crystals of Bis(N‐alkylethylenediamine)silver(I) Nitrate

et al. 2004

Self Cite

View full text Add to dashboard Cite

show abstract

“…Chloroform (ClF) of G.R. grade, supplied by Wako Chemicals, was purified by a previous procedure to remove the small amount of ethanol (EtOH), 11 and its final water content was 2.5 ppm (W 0 = 1.5 × 10 −4 ). EtOH was singly distilled prior to use, and the water content was 17300 ppm (W 0 = 4.5 × 10 −2 ).…”

Section: ■ Introductionmentioning

confidence: 99%

Solvation Structure of a Copper(II) Ion in Protic Ionic Liquids Comprising N-Hexylethylenediamine

et al. 2014

Self Cite

View full text Add to dashboard Cite

The fine and dynamic structure of the copper(II) ion solvated in a protic ionic liquid (PIL) comprising monoprotonated N-hexylethylenediaminium (HHexen(+)) and bis(trifluoromethanesulfonyl)amide (Tf2N(-)) [or trifluoroacetate (TFA(-))] was determined using NMR, visible electronic, and extended X-ray absorption fine structure (EXAFS) spectroscopy. The chelate-diamine group in the cationic unit facilitates advantageous dissolution of transition-metal salts in the present PIL. The interaction of the copper(II) ion with the chelate-diamine PIL was explored by the addition of copper(II) salts to the PIL, demonstrating competitive complexation between the ligand of the added copper(II) salt and the components of the ionic liquid to the copper(II) ion. The favorable mode of interaction of the present chelating PIL with the copper(II) ion was clarified based on a comparison of the interactions with analogous liquids, including the monoprotonated hexylaminium HHexam(Tf2N)-PIL, neat N-hexylethylenediamine (Hexen), and neat ethylenediamine (En). The coordination modes of the bis-Hexen and tris-Hexen copper(II) complexes in molecular liquids and in solids were also studied for comparison of the coordination structures around the copper(II) ion with those in the present PILs. The paramagnetic-induced relaxations derived from (13)C (ΔT(1p)(-1)) and (15)N (ΔT(2p)(-1)) NMR, the visible electronic spectra, and EXAFS analysis showed that the copper(II) ion tends to form a bis-Hexen complex in the HHexen-PIL despite the electrostatic repulsion and the fact that the counteranions are located at the axial sites, whereas in the HHexam(Tf2N)-PIL, the copper(II) ion exhibits affinity for the Tf2N anion over the protonated amines. The lifetime of the copper(II) complex formed in the PIL was determined to be ≈10(-4) s based on (13)C (ΔT(1p)(-1)) and (14)N (ΔT(2p)(-1)) NMR, which is appreciably longer than that in conventional molecular solvents.

show abstract

Ionic Liquids of Bis(alkylethylenediamine)silver(I) Salts and the Formation of Silver(0) Nanoparticles from the Ionic Liquid System

Iida¹,

Baba²,

Inoue³

et al. 2008

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

We have prepared novel ionic liquids of bis(N-2-ethylhexylethylenediamine)silver(I) nitrate ([Ag(eth-hex-en)(2)]NO(3) and bis(N-hexylethylenediamine)silver(I) hexafluorophosphate ([Ag(hex-en)(2)]PF(6)), which have transition points at -54 and -6 degrees C, respectively. Below these transition temperatures, both the silver complexes assume amorphous states, in which the extent of the vitrification is larger for the eth-hex-en complex than for the hex-en complex. The diffusion coefficients of both the complex cations, measured between 30 (or 35) and 70 degrees C, are largely dependent on temperature; the dependence is particularly large in the case of the eth-hex-en complex cation below 40 degrees C. Small-angle X-ray scattering studies showed that the bilayer structure of the metal complex is formed in the liquid state for both the silver complexes. A direct observation of the yellowish [Ag(eth-hex-en)(2)]NO(3) liquid by transmission electron microscopy (TEM) indicates the presence of nanostructures, as a microemulsion, of less than 5 nm. Such structures were not clearly observed in the [Ag(hex-en)(2)]PF(6) liquid. Although the [Ag(eth-hex-en)(2)]NO(3) liquid is sparingly soluble in bulk water, it readily incorporates a small amount of water up to [water]/[metal complex] = 7:1. Homogeneous and uniformly sized silver(0) nanoparticles in water were created by the reduction of the [Ag(eth-hex-en)(2)]NO(3) liquid with aqueous NaBH(4), whereas silver(0) nanoparticles were not formed from the [Ag(hex-en)(2)]PF(6) liquid in the same way.

show abstract

The Aggregation of Dichlorobis(N-hexylethylenediamine)zinc(II) in Water and Water/Chloroform Mixed Solvents

Cited by 13 publications

References 23 publications

Formation of Thermotropic and Lyotropic Liquid Crystals of Bis(N‐alkylethylenediamine)silver(I) Nitrate

Formation of Thermotropic and Lyotropic Liquid Crystals of Bis(N‐alkylethylenediamine)silver(I) Nitrate

Solvation Structure of a Copper(II) Ion in Protic Ionic Liquids Comprising N-Hexylethylenediamine

Ionic Liquids of Bis(alkylethylenediamine)silver(I) Salts and the Formation of Silver(0) Nanoparticles from the Ionic Liquid System

Contact Info

Product

Resources

About