DOI: 10.1135/cccc19950393. Pyridinium Ions - New Probe for Basic Sites of Solid Acids

Pyridinium Ions - New Probe for Basic Sites of Solid Acids

10.1135/cccc19950393

Crossref journal-article

Institute of Organic Chemistry & Biochemistry

Collection of Czechoslovak Chemical Communications (111)

Abstract

The hydrogen bonding interactions of the pyridinium ion (PyH+) with the deprotonated skeleton of acid zeolites were studied using Fourier transform infrared (FTIR) spectroscopy and quantum chemical ab initio calculations. It was found that the frequency of the NH stretching vibration, n(NH), of the newly formed H-bond increases in the zeolite sequence HNaX < HY < HM ~ HZSM-5. This is related to decreasing basicity of the skeletal oxygens (basic sites conjugated to bridging hydroxyls). Therefore, pyridine can serve as a probe for the basic sites of acid zeolites. In this way it can complement the pyrrole probe, which is established for basicity monitoring of alkali-metal exchanged zeolites.

Bibliography

Kotrla, J., FloriÃ¡n, J., KubelkovÃ¡, L., & Fraissard, J. (1995). Pyridinium Ions - New Probe for Basic Sites of Solid Acids. Collection of Czechoslovak Chemical Communications, 60(3), 393â402.

Authors 4

Josef Kotrla (first)
Jan Florián (additional)
Ludmila Kubelková (additional)
Jacques Fraissard (additional)

References 0 Referenced 9

None

Dates

Type	When
Created	23 years, 1 month ago (July 27, 2002, 5:01 a.m.)
Deposited	6 years, 11 months ago (Sept. 9, 2018, 7:47 a.m.)
Indexed	2 years ago (Sept. 3, 2023, 8:54 a.m.)
Issued	30 years, 8 months ago (Jan. 1, 1995)
Published	30 years, 8 months ago (Jan. 1, 1995)
Published Online	30 years, 8 months ago (Jan. 1, 1995)
Published Print	30 years, 8 months ago (Jan. 1, 1995)

Funders 0

None

BibTeX

@article{Kotrla_1995, title={Pyridinium Ions - New Probe for Basic Sites of Solid Acids}, volume={60}, ISSN={1212-6950}, url={http://dx.doi.org/10.1135/cccc19950393}, DOI={10.1135/cccc19950393}, number={3}, journal={Collection of Czechoslovak Chemical Communications}, publisher={Institute of Organic Chemistry & Biochemistry}, author={Kotrla, Josef and Florián, Jan and Kubelková, Ludmila and Fraissard, Jacques}, year={1995}, pages={393–402} }

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