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

Research output: Contribution to journalArticle

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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
Issue number3
Publication statusPublished - Jan 1 1998


ASJC Scopus subject areas

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

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