Infrared Spectroscopy Studies of Platinum Salts Containing Tetracyanoplatinate(II). Evidence for Strong Hydrogen-Bonding Interactions in "Vapochromic" Environmental Sensor Materials

Christopher L. Exstrom, Marie K. Pomije, Kent R. Mann

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Abstract

We have studied the sorption of volatile organic compounds (VOCs) by [(n-C4H9)4N]2[Pt-(CN)4] and [Pt(p-CN-C6H4-C10H21) 4][Pt(CN)4] with FTIR spectroscopy. The data indicate a strong correlation exists between ν(CN) stretching frequencies in the [Pt(CN)4]2- ions and the hydrogen bonding ability of the VOC (as expressed by Abraham's a values). The ν(CN) stretching frequencies for each salt with sorbed VOC indicate that similar VOC-material interactions are present in both. The correlation of the IR data for [Pt(p-CN-C6H4-C10H21) 4]-[Pt(CN)4] with the previously reported NIR data was only successful for solvents with α > 0.15. These results suggest that vapochromic shifts in the electronic transitions of [Pt(p-CN-C6H4-C10H21) 4][Pt(CN)4] result not only from H-bonds between the VOC and [Pt(CN)4]2- but also from one or more additional mechanisms that are most important for solvents with low H-bond donor character (α < 0.15).

Original languageEnglish (US)
Pages (from-to)942-945
Number of pages4
JournalChemistry of Materials
Volume10
Issue number3
DOIs
StatePublished - Jan 1 1998

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Volatile Organic Compounds
Platinum
Volatile organic compounds
Infrared spectroscopy
Hydrogen bonds
Salts
Sensors
Stretching
Sorption
Spectroscopy
Ions

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

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title = "Infrared Spectroscopy Studies of Platinum Salts Containing Tetracyanoplatinate(II). Evidence for Strong Hydrogen-Bonding Interactions in {"}Vapochromic{"} Environmental Sensor Materials",
abstract = "We have studied the sorption of volatile organic compounds (VOCs) by [(n-C4H9)4N]2[Pt-(CN)4] and [Pt(p-CN-C6H4-C10H21) 4][Pt(CN)4] with FTIR spectroscopy. The data indicate a strong correlation exists between ν(CN) stretching frequencies in the [Pt(CN)4]2- ions and the hydrogen bonding ability of the VOC (as expressed by Abraham's a values). The ν(CN) stretching frequencies for each salt with sorbed VOC indicate that similar VOC-material interactions are present in both. The correlation of the IR data for [Pt(p-CN-C6H4-C10H21) 4]-[Pt(CN)4] with the previously reported NIR data was only successful for solvents with α > 0.15. These results suggest that vapochromic shifts in the electronic transitions of [Pt(p-CN-C6H4-C10H21) 4][Pt(CN)4] result not only from H-bonds between the VOC and [Pt(CN)4]2- but also from one or more additional mechanisms that are most important for solvents with low H-bond donor character (α < 0.15).",
author = "Exstrom, {Christopher L.} and Pomije, {Marie K.} and Mann, {Kent R.}",
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AU - Pomije, Marie K.

AU - Mann, Kent R.

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AB - We have studied the sorption of volatile organic compounds (VOCs) by [(n-C4H9)4N]2[Pt-(CN)4] and [Pt(p-CN-C6H4-C10H21) 4][Pt(CN)4] with FTIR spectroscopy. The data indicate a strong correlation exists between ν(CN) stretching frequencies in the [Pt(CN)4]2- ions and the hydrogen bonding ability of the VOC (as expressed by Abraham's a values). The ν(CN) stretching frequencies for each salt with sorbed VOC indicate that similar VOC-material interactions are present in both. The correlation of the IR data for [Pt(p-CN-C6H4-C10H21) 4]-[Pt(CN)4] with the previously reported NIR data was only successful for solvents with α > 0.15. These results suggest that vapochromic shifts in the electronic transitions of [Pt(p-CN-C6H4-C10H21) 4][Pt(CN)4] result not only from H-bonds between the VOC and [Pt(CN)4]2- but also from one or more additional mechanisms that are most important for solvents with low H-bond donor character (α < 0.15).

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