Electrical, spectral and thermochromic properties of some hydrazone derivatives

A. A. Salem; Y. M. Issa; M. I. Ayad; M. Elkholy

doi:10.1007/BF00186185

Electrical, spectral and thermochromic properties of some hydrazone derivatives

A. A. Salem, Y. M. Issa, M. I. Ayad, M. Elkholy

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6 Citations (Scopus)

Abstract

The electrical and spectral properties of some ethyl cyanoacetate phenylhydrazone derivatives have been investigated. Results obtained show anomalous metallic-like and semiconducting behaviours corresponding to the low and higher temperature ranges. At high temperatures a positive temperature coefficient of electrical conductivity (dΣ/d T) provides evidence for the semiconducting character, and the linear correlation indicates metallic-like behaviour at a low temperature range. Values of activation energy (δE) were calculated in each case. In addition, the current-voltage dependence of the hydrazone derivatives was investigated. This showed that the compounds under study have ohmic conduction. The correlation between γ_max and Σa Hammett constant was also investigated. The hydrazone derivatives are thermolabile and undergo thermochromic behaviour during heating.

Original language	English
Pages (from-to)	199-202
Number of pages	4
Journal	Journal of Materials Science: Materials in Electronics
Volume	5
Issue number	4
DOIs	https://doi.org/10.1007/BF00186185
Publication status	Published - Aug 1994
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1007/BF00186185

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@article{e71934971c124b58b33addbc68f5e300,

title = "Electrical, spectral and thermochromic properties of some hydrazone derivatives",

abstract = "The electrical and spectral properties of some ethyl cyanoacetate phenylhydrazone derivatives have been investigated. Results obtained show anomalous metallic-like and semiconducting behaviours corresponding to the low and higher temperature ranges. At high temperatures a positive temperature coefficient of electrical conductivity (dΣ/d T) provides evidence for the semiconducting character, and the linear correlation indicates metallic-like behaviour at a low temperature range. Values of activation energy (δE) were calculated in each case. In addition, the current-voltage dependence of the hydrazone derivatives was investigated. This showed that the compounds under study have ohmic conduction. The correlation between γmax and Σa Hammett constant was also investigated. The hydrazone derivatives are thermolabile and undergo thermochromic behaviour during heating.",

author = "Salem, {A. A.} and Issa, {Y. M.} and Ayad, {M. I.} and M. Elkholy",

year = "1994",

month = aug,

doi = "10.1007/BF00186185",

language = "English",

volume = "5",

pages = "199--202",

journal = "Journal of Materials Science: Materials in Electronics",

issn = "0957-4522",

publisher = "Springer New York",

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TY - JOUR

T1 - Electrical, spectral and thermochromic properties of some hydrazone derivatives

AU - Salem, A. A.

AU - Issa, Y. M.

AU - Ayad, M. I.

AU - Elkholy, M.

PY - 1994/8

Y1 - 1994/8

N2 - The electrical and spectral properties of some ethyl cyanoacetate phenylhydrazone derivatives have been investigated. Results obtained show anomalous metallic-like and semiconducting behaviours corresponding to the low and higher temperature ranges. At high temperatures a positive temperature coefficient of electrical conductivity (dΣ/d T) provides evidence for the semiconducting character, and the linear correlation indicates metallic-like behaviour at a low temperature range. Values of activation energy (δE) were calculated in each case. In addition, the current-voltage dependence of the hydrazone derivatives was investigated. This showed that the compounds under study have ohmic conduction. The correlation between γmax and Σa Hammett constant was also investigated. The hydrazone derivatives are thermolabile and undergo thermochromic behaviour during heating.

AB - The electrical and spectral properties of some ethyl cyanoacetate phenylhydrazone derivatives have been investigated. Results obtained show anomalous metallic-like and semiconducting behaviours corresponding to the low and higher temperature ranges. At high temperatures a positive temperature coefficient of electrical conductivity (dΣ/d T) provides evidence for the semiconducting character, and the linear correlation indicates metallic-like behaviour at a low temperature range. Values of activation energy (δE) were calculated in each case. In addition, the current-voltage dependence of the hydrazone derivatives was investigated. This showed that the compounds under study have ohmic conduction. The correlation between γmax and Σa Hammett constant was also investigated. The hydrazone derivatives are thermolabile and undergo thermochromic behaviour during heating.

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DO - 10.1007/BF00186185

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JO - Journal of Materials Science: Materials in Electronics

JF - Journal of Materials Science: Materials in Electronics

IS - 4

ER -

Electrical, spectral and thermochromic properties of some hydrazone derivatives

Abstract

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