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Crystal Growth of 2‐Cyclooctylamino‐5‐Nitropyridine (COANP) and 2‐(N‐(L)‐Prolinol‐5‐Nitropyridine (PNP) from TMS Gels
Author(s) -
Br̆ezina B.,
Hulliger J.
Publication year - 1991
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170260204
Subject(s) - supersaturation , seeding , ethanol , crystal (programming language) , crystal growth , chemistry , crystallography , materials science , chemical engineering , organic chemistry , physics , computer science , engineering , programming language , thermodynamics
Single crystals of 2‐cyclooctylamino‐5‐nitropyridine (COANP) and 2‐(N‐(L)‐prolinol‐5‐nitropyridine (PNP) were grown from tetramethoxysilane gels. Lowering the temperature or seeding of supersaturated water/ethanol gel solutions led to optical quality crystals of several mm in size. In the case of PNP the addition of Nd 3+ to the gel solutions decreased the concentration of milky defects. Morphological descriptions for COANP and PNP crystals are given.