sup 31 P solid-state NMR studies of the structure of amine-intercalated. alpha. -zirconium phosphate. Reaction of. alpha. -zirconium phosphate with excess amine

• Published in: Journal of physical chemistry (1952) 1990-09, Vol.94:19
• Main Authors: MacLachlan, D.J., Morgan, K.R.
• Format: Article
• Language: English
• Subjects: 400201 - Chemical & Physicochemical Properties; AMINES; AMMONIA; COHERENT SCATTERING; DIFFRACTION; HYDRAZINE; HYDRIDES; HYDROGEN COMPOUNDS; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ISOTOPES; LIGHT NUCLEI; MAGNETIC RESONANCE; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NUCLEAR MAGNETIC RESONANCE; NUCLEI; ODD-EVEN NUCLEI; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHASE STUDIES; PHOSPHATES; PHOSPHORUS 31; PHOSPHORUS COMPOUNDS; PHOSPHORUS ISOTOPES; RESONANCE; SCATTERING; STABLE ISOTOPES; STRUCTURAL CHEMICAL ANALYSIS; TRANSITION ELEMENT COMPOUNDS; X-RAY DIFFRACTION; ZIRCONIUM COMPOUNDS; ZIRCONIUM PHOSPHATES
• ISSN: 0022-3654; 1541-5740
• DOI: 10.1021/j100382a062

Ammonia, hydrazine, and a range of simple amines were intercalated into {alpha}-Zr(HPO{sub 4}){sub 2}{center dot}H{sub 2}O. The phases that formed have been characterized by X-ray diffraction and {sup 31}P MAS NMR studies. The position and intensity of the isotropic {sup 31}P resonances were found to depend on the type of amine present in the phase. {sup 31}P chemical shifts changed with deprotonation and with differences in the hydrogen-bonding environment about the acidic phosphate. With intercalation, linear alkyl chain primary amines produced downfield shifts of the phosphate groups while secondary and tertiary amines produced upfield shifts. Water content was also found to have an effect on the {sup 31}P chemical shifts.