Preparation of Centimeter-Sized Zeolite Crystals by Hydrothermal Seeded Growth

1994 ◽  
Vol 346 ◽  
Author(s):  
Walter G. Klemperer ◽  
Todd A. Marquart
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Differential Scanning Calorimetry ◽  
Magnetic Resonance ◽  
Optical Microscopy ◽  
X Ray Diffraction ◽  
Seeded Growth ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Nuclear Magnetic ◽  
Zeolite Crystals

ABSTRACTCentimeter-sized crystals of pyridine dodecasil 3C (all silica zeolite ZSM-39) have been prepared using hydrothermal seeded growth techniques and characterized by differential scanning calorimetry, nuclear magnetic resonance, optical microscopy and powder X-ray diffraction.

scholarly journals Recent Advances in Solid-State Analysis of Pharmaceuticals

2015 ◽  
Vol 2 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Syed Nasir Abbas Bukhari ◽  
Ng Shin Hwei ◽  
Ibrahim Jantan
Keyword(s):  
Electron Microscopy ◽  
Nuclear Magnetic Resonance ◽  
Differential Scanning Calorimetry ◽  
Raman Spectroscopy ◽  
Solid State ◽  
Magnetic Resonance ◽  
Spatial Resolution ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray

Current analytical techniques for characterizing solid-state pharmaceuticals include powder x-ray diffraction, differential scanning calorimetry, thermogravimetric analysis, infrared spectroscopy, Raman spectroscopy, electron microscopy and nuclear magnetic resonance. Powder x-ray diffraction and differential scanning calorimetry are mainstream techniques but they lack spatial resolution. Scanning electron microscopy and micro-Raman spectroscopy provide good chemical and optical characterization but they are not capable of analysing very small nanoparticles. Transmission electron microscopy and nano-thermal analysis can provide explicit characterization of nanoparticles but they are invasive. Nuclear magnetic resonance offers good spatial resolution but its use is mainly limited by poor sensitivity and high costs. In view of the many challenges posed by existing methods, new and novel techniques are being continually researched and developed to cater to the growing number of solid formulations in the pipeline and in the market. Some of the recent advances attained in the solid-state analysis of pharmaceutical are summarized in this review article.

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