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Nanoporosity and Exceptional Negative Thermal Expansion in Single‐Network Cadmium Cyanide
Author(s) -
Phillips Anthony E.,
Goodwin Andrew L.,
Halder Gregory J.,
Southon Peter D.,
Kepert Cameron J.
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200704421
Subject(s) - thermal expansion , cyanide , negative thermal expansion , isotropy , occupancy , thermal , graph , molecule , cadmium , computer science , materials science , physics , condensed matter physics , chemistry , thermodynamics , theoretical computer science , optics , inorganic chemistry , quantum mechanics , engineering , organic chemistry , architectural engineering
Accentuate the negative : Single‐network cadmium cyanide displays isotropic negative thermal expansion behavior of unprecedented magnitude over a large temperature range (see graph of unit cell parameter a versus temperature). Guest molecules in the pores of this framework block the transverse vibrational modes responsible for this behavior, causing the value of the linear coefficient of thermal expansion to increase with guest occupancy.