Electrical and NO2Sensing Properties of a Series of Liquid Crystalline Porphyrins
Küçük Resim Yok
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Electrochemical Soc Inc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The electrical and NO(2)sensing properties of a series of porphyrin derivatives (PPC12, PPC16, ZnPPC12) were studied within wide temperature range from 293 to 423 K under the N(2)gas flow and in the frequency range from 1 kHz to 1 MHz for ac electrical measurements. The dc conductivities and the activation energies were found to be in the range of 10(-13)-10(-12)S cm(-1)at the room temperature and 0.46-1.03 eV respectively. The increased C number in the alkyl chain and addition of metal ion to the porphyrin causes a decrease in the conductivity. The ac conductivity was well represented by the power law form A omega(s). The s parameter depending on temperature was varied 0.79-1.2. The conduction mechanism for all porphyrins could be related to small polaron tunneling (SPT) model. As an application, the NO(2)sensing properties of ZnPPC12 were investigated depending on temperature.
Açıklama
Anahtar Kelimeler
Sensors, Porphyrin, Electrical Conductivity, NO2 sensing, Small polaron tunneling model
Kaynak
Ecs Journal of Solid State Science and Technology
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
9
Sayı
6
