A solid-state NMR study of the molecular sieve VPI-5 synthesized in the presence of a CTABr surfactant.
Silicon-free and silicon-rich large-pore aluminophosphate VPI-5, synthesized with various contents of AIPO-H3 impurity, was studied by Bloch decay (BD) and cross polarization (CP) NMR under magic angle spinning (MAS). The 1H-->31P CP peaks were considerably stronger from AIPO-H3 than from VPI-5. A detailed examination of the CP kinetics and a careful comparison of the CP and BD spectra are prerequisites for the unequivocal interpretation of 1H-->31P CP in porous aluminophosphates.
Blasco
T
T
Instituto de Tecnología Química (UPV-CSIC), Universidad Politécnica de Valencia, Spain.
Pérez-Pariente
J
J
Kolodziejski
W
W
D017607:Aluminum Compounds / Q000032:analysis / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010710:Phosphates / Q000032:analysis / Q000138:chemical synthesis*; D012825:Silicon / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry*
D017607:Aluminum Compounds; D010710:Phosphates; D013501:Surface-Active Agents; C012714:aluminum phosphate; D012825:Silicon