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[Untitled]

Authors :
María Elena Sánchez-Vergara
J. Gómez-Lara
Rubén A. Toscano
Simón Hernández-Ortega
Source :
Journal of Chemical Crystallography. 28:825-830
Publication Year :
1998
Publisher :
Springer Science and Business Media LLC, 1998.

Abstract

Charge transfer molecular solids [diaqua tetrabenzo (b,f,j,n,) {1,5,9,13) tetraazacyclohexadecine] Ni(II) and Cu(II) bisanthraflavates were synthesized and characterized by IR, Mass Spectrometry, TGA, and X-ray diffraction on single crystals. Unit cell dimensions (A) a = 12.291(1), c = 14.574(1) A and a = 12.434(1), c = 14.066(1) A for Cu(II) and Ni(II) derivatives, respectively, space group P42/n in both cases. The obtained compounds show expected chemical and structural similarities. Tetraazamacrocycles are surrounded individually by a zig-zag, ribbon-like motif extending in the crystal by head-to-tail hydrogen bonding of monosubstituted anthraflavates. Electric conductivities were measured by the four points method as pellets from the variation of electric current through the sample as a function of temperature, for fixed voltages in the ohmic regime. Preliminary results indicate low conductivity values at room temperature but semiconductivity behaviour in the temperature range −150 to 170°C.

Details

ISSN :
10741542
Volume :
28
Database :
OpenAIRE
Journal :
Journal of Chemical Crystallography
Accession number :
edsair.doi...........ac5a0939834ffd54630a4a604f2ced01
Full Text :
https://doi.org/10.1023/a:1021879804444