A new type of acidic hydroxyl groups in ZSM-5 zeolite and in mordenite according to diffuse reflectance i.r. spectroscopy

✍ Scribed by V.L. Zholobenko; L.M. Kustov; V.Yu. Borovkov; V.B. Kazansky

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 310 KB
• Volume: 8
• Category: Article
• ISSN: 0144-2449
• DOI: 10.1016/s0144-2449(88)80303-8

✦ Synopsis

HZSM-5 zeolites and H mordenite were studied using diffuse reflectance i.r. spectroscopy in the region of stretching vibrations of hydroxyls. A new type of acidic OH groups was detected that represents a bridged hydroxyl forming a strained intramolecular hydrogen bond with a neighboring oxygen atom. Properties of the new type of hydroxyls were investigated and are discussed.