ESR, ENDOR and ESEEM studies of Lewis acid site interactions with tetrachloro-1,2-benzoquinone in aluminosilicate catalysts

R. I. Samoilova; A. V. Astashkin; S. A. Dikanov; D. Goldfarb; E. V. Lunina

doi:10.1016/0927-7757(93)80448-N

ESR, ENDOR and ESEEM studies of Lewis acid site interactions with tetrachloro-1,2-benzoquinone in aluminosilicate catalysts

R. I. Samoilova, A. V. Astashkin, S. A. Dikanov, D. Goldfarb, E. V. Lunina

Research output: Contribution to journal › Article › peer-review

Abstract

The interactions of o-chloranyl (tetrachloro-1,2-benzoquinone) with Lewis acid sites in HY, H-mordenite and H-ZSM-5 zeolites and in aluminum oxide have been studied using electron spin resonance, electron nuclear double resonance and electron spin echo envelope modulation spectroscopies. The results are compared to those obtained from paramagnetic complexes generated in a solution of o-quinone and AlCl₃ which serves as a model system. The detected ²⁷Al hyperfine interactions lead to the conclusion that adsorption of o-chloranyl on activated catalysts yields a paramagnetic complex with Al³⁺ Lewis acid sites. Hence, o-chloranyl can be used as an indicator for the detection and quantification of such sites.

Original language	English (US)
Pages (from-to)	29-35
Number of pages	7
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	72
Issue number	C
DOIs	https://doi.org/10.1016/0927-7757(93)80448-N
State	Published - Jun 17 1993
Externally published	Yes

Keywords

Aluminosilicate catalysts
ENDOR
ESEEM
ESR
tetrachloro-1,2-benzoquinone.

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

Online availability

10.1016/0927-7757(93)80448-N

Library availability

Discover UIUC Full Text

Cite this

@article{efe55dbb8dd7411aa7d839c3e4eadb76,

title = "ESR, ENDOR and ESEEM studies of Lewis acid site interactions with tetrachloro-1,2-benzoquinone in aluminosilicate catalysts",

abstract = "The interactions of o-chloranyl (tetrachloro-1,2-benzoquinone) with Lewis acid sites in HY, H-mordenite and H-ZSM-5 zeolites and in aluminum oxide have been studied using electron spin resonance, electron nuclear double resonance and electron spin echo envelope modulation spectroscopies. The results are compared to those obtained from paramagnetic complexes generated in a solution of o-quinone and AlCl3 which serves as a model system. The detected 27Al hyperfine interactions lead to the conclusion that adsorption of o-chloranyl on activated catalysts yields a paramagnetic complex with Al3+ Lewis acid sites. Hence, o-chloranyl can be used as an indicator for the detection and quantification of such sites.",

keywords = "Aluminosilicate catalysts, ENDOR, ESEEM, ESR, tetrachloro-1,2-benzoquinone.",

author = "Samoilova, {R. I.} and Astashkin, {A. V.} and Dikanov, {S. A.} and D. Goldfarb and Lunina, {E. V.}",

note = "Funding Information: We wish to thank Prof. V.B. Kazansky for the gift of ZSM-5 zeolites and Dr. A. Piskunov for the synthesis of o-chloranyl. S.A.D. thanks the Department of Chemical Physics of the Weizmann Institute of Science for supporting his stay at this Institute and for the hospitality shown. This study was made possible, in part, by funds granted to D.G. through a fellowship program sponsored by the Charles H. Revson Foundation.",

year = "1993",

month = jun,

day = "17",

doi = "10.1016/0927-7757(93)80448-N",

language = "English (US)",

volume = "72",

pages = "29--35",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

issn = "0927-7757",

publisher = "Elsevier",

number = "C",

}

TY - JOUR

T1 - ESR, ENDOR and ESEEM studies of Lewis acid site interactions with tetrachloro-1,2-benzoquinone in aluminosilicate catalysts

AU - Samoilova, R. I.

AU - Astashkin, A. V.

AU - Dikanov, S. A.

AU - Goldfarb, D.

AU - Lunina, E. V.

N1 - Funding Information: We wish to thank Prof. V.B. Kazansky for the gift of ZSM-5 zeolites and Dr. A. Piskunov for the synthesis of o-chloranyl. S.A.D. thanks the Department of Chemical Physics of the Weizmann Institute of Science for supporting his stay at this Institute and for the hospitality shown. This study was made possible, in part, by funds granted to D.G. through a fellowship program sponsored by the Charles H. Revson Foundation.

PY - 1993/6/17

Y1 - 1993/6/17

N2 - The interactions of o-chloranyl (tetrachloro-1,2-benzoquinone) with Lewis acid sites in HY, H-mordenite and H-ZSM-5 zeolites and in aluminum oxide have been studied using electron spin resonance, electron nuclear double resonance and electron spin echo envelope modulation spectroscopies. The results are compared to those obtained from paramagnetic complexes generated in a solution of o-quinone and AlCl3 which serves as a model system. The detected 27Al hyperfine interactions lead to the conclusion that adsorption of o-chloranyl on activated catalysts yields a paramagnetic complex with Al3+ Lewis acid sites. Hence, o-chloranyl can be used as an indicator for the detection and quantification of such sites.

AB - The interactions of o-chloranyl (tetrachloro-1,2-benzoquinone) with Lewis acid sites in HY, H-mordenite and H-ZSM-5 zeolites and in aluminum oxide have been studied using electron spin resonance, electron nuclear double resonance and electron spin echo envelope modulation spectroscopies. The results are compared to those obtained from paramagnetic complexes generated in a solution of o-quinone and AlCl3 which serves as a model system. The detected 27Al hyperfine interactions lead to the conclusion that adsorption of o-chloranyl on activated catalysts yields a paramagnetic complex with Al3+ Lewis acid sites. Hence, o-chloranyl can be used as an indicator for the detection and quantification of such sites.

KW - Aluminosilicate catalysts

KW - ENDOR

KW - ESEEM

KW - ESR

KW - tetrachloro-1,2-benzoquinone.

UR - http://www.scopus.com/inward/record.url?scp=0009195760&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0009195760&partnerID=8YFLogxK

U2 - 10.1016/0927-7757(93)80448-N

DO - 10.1016/0927-7757(93)80448-N

M3 - Article

AN - SCOPUS:0009195760

SN - 0927-7757

VL - 72

SP - 29

EP - 35

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - C

ER -

ESR, ENDOR and ESEEM studies of Lewis acid site interactions with tetrachloro-1,2-benzoquinone in aluminosilicate catalysts

Abstract

Keywords

ASJC Scopus subject areas

Online availability

Library availability

Related links

Fingerprint

Cite this