Ionic reaction products of iodine with pyridine, 4-methylpyridine, and 4-tert-butylpyridine in a polyethylene matrix

A FTIR polarization spectroscopic investigation

Huong Thu Ngyuen, Duy Duc Nguyen, Jens Spanget-Larsen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The ionic reaction products of the title pyridines with iodine in low-density polyethylene are identified by comparison of their IR spectra with literature data. The bis(pyridine)iodine(I), bis(4-methylpyridine)iodine(I), and bis(tert-butylpyridine)iodine(I) cations are spontaneously formed in the polymer medium. At elevated temperature, the 4-methylpyridinium cation is identified as a product of the reaction between 4-methylpyridine and iodine. In spite of their elongated molecular shape, the bis(pyridine)iodine(I) and bis(4-methylpyridine)iodine(I) cations are randomly aligned in stretched polyethylene; they probably form micro-crystalline polyiodide aggregates in the amorphous regions of the polymer. In contrast, the bis(tert-butylpyridine)iodine(I) cation is efficiently aligned in stretched polyethylene.
OriginalsprogEngelsk
TidsskriftChemical Physics Letters
Vol/bind716
Sider (fra-til)119-125
Antal sider7
ISSN0009-2614
DOI
StatusUdgivet - 1 feb. 2019

Citer dette

@article{793e1173aed148869299d22e8721484e,
title = "Ionic reaction products of iodine with pyridine, 4-methylpyridine, and 4-tert-butylpyridine in a polyethylene matrix: A FTIR polarization spectroscopic investigation",
abstract = "The ionic reaction products of the title pyridines with iodine in low-density polyethylene are identified by comparison of their IR spectra with literature data. The bis(pyridine)iodine(I), bis(4-methylpyridine)iodine(I), and bis(tert-butylpyridine)iodine(I) cations are spontaneously formed in the polymer medium. At elevated temperature, the 4-methylpyridinium cation is identified as a product of the reaction between 4-methylpyridine and iodine. In spite of their elongated molecular shape, the bis(pyridine)iodine(I) and bis(4-methylpyridine)iodine(I) cations are randomly aligned in stretched polyethylene; they probably form micro-crystalline polyiodide aggregates in the amorphous regions of the polymer. In contrast, the bis(tert-butylpyridine)iodine(I) cation is efficiently aligned in stretched polyethylene.",
author = "Ngyuen, {Huong Thu} and Nguyen, {Duy Duc} and Jens Spanget-Larsen",
year = "2019",
month = "2",
day = "1",
doi = "10.1016/j.cplett.2018.12.010",
language = "English",
volume = "716",
pages = "119--125",
journal = "Chemical Physics Letters",
issn = "0009-2614",
publisher = "Elsevier BV",

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Ionic reaction products of iodine with pyridine, 4-methylpyridine, and 4-tert-butylpyridine in a polyethylene matrix : A FTIR polarization spectroscopic investigation. / Ngyuen, Huong Thu; Nguyen, Duy Duc; Spanget-Larsen, Jens.

I: Chemical Physics Letters, Bind 716, 01.02.2019, s. 119-125.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Ionic reaction products of iodine with pyridine, 4-methylpyridine, and 4-tert-butylpyridine in a polyethylene matrix

T2 - A FTIR polarization spectroscopic investigation

AU - Ngyuen, Huong Thu

AU - Nguyen, Duy Duc

AU - Spanget-Larsen, Jens

PY - 2019/2/1

Y1 - 2019/2/1

N2 - The ionic reaction products of the title pyridines with iodine in low-density polyethylene are identified by comparison of their IR spectra with literature data. The bis(pyridine)iodine(I), bis(4-methylpyridine)iodine(I), and bis(tert-butylpyridine)iodine(I) cations are spontaneously formed in the polymer medium. At elevated temperature, the 4-methylpyridinium cation is identified as a product of the reaction between 4-methylpyridine and iodine. In spite of their elongated molecular shape, the bis(pyridine)iodine(I) and bis(4-methylpyridine)iodine(I) cations are randomly aligned in stretched polyethylene; they probably form micro-crystalline polyiodide aggregates in the amorphous regions of the polymer. In contrast, the bis(tert-butylpyridine)iodine(I) cation is efficiently aligned in stretched polyethylene.

AB - The ionic reaction products of the title pyridines with iodine in low-density polyethylene are identified by comparison of their IR spectra with literature data. The bis(pyridine)iodine(I), bis(4-methylpyridine)iodine(I), and bis(tert-butylpyridine)iodine(I) cations are spontaneously formed in the polymer medium. At elevated temperature, the 4-methylpyridinium cation is identified as a product of the reaction between 4-methylpyridine and iodine. In spite of their elongated molecular shape, the bis(pyridine)iodine(I) and bis(4-methylpyridine)iodine(I) cations are randomly aligned in stretched polyethylene; they probably form micro-crystalline polyiodide aggregates in the amorphous regions of the polymer. In contrast, the bis(tert-butylpyridine)iodine(I) cation is efficiently aligned in stretched polyethylene.

U2 - 10.1016/j.cplett.2018.12.010

DO - 10.1016/j.cplett.2018.12.010

M3 - Journal article

VL - 716

SP - 119

EP - 125

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

ER -