Application of Brønsted-Type LFER in the Study of the Phospholipase C Mechanism †
✍ Scribed by Mihai, Cornelia; Kravchuk, Alexander V.; Tsai, Ming-Daw; Bruzik, Karol S.
- Book ID
- 127046907
- Publisher
- American Chemical Society
- Year
- 2003
- Tongue
- English
- Weight
- 111 KB
- Volume
- 125
- Category
- Article
- ISSN
- 0002-7863
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📜 SIMILAR VOLUMES
Deuteration of Bronsted acidic sites in zeolites gives observable infrared in-plane O-D bending modes. For zeolite Y and ZK-5, a maximum near 870 cm-' with a shoulder near 890 cm-' is observed. These signals arc related to, respectively, the highfrequency and the low-frequency stretching modes. Mord
H 2'AI and %i solid-state NMR was used to determine the geometry of the Brsnsted acid site in zeolites. The mean distance between acidic protons in bridging hydroxyl groups and the nearest framework Al atom is 2.38 ? 0.04 8, in zeolite H-Y and 2.48 2 0.04 A in H-ZSM-5. The quadrupole frequency of fr