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Synthesis and Electrochemical Studies of Conjugatedly Linked Multiporphyrins and Their Metal Complexes

Thesis Info

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Author

Yaseen, Muhammad

Program

PhD

Institute

University of the Punjab

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2010

Thesis Completion Status

Completed

Subject

Chemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/693

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727469610

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In this study, an organic semiconductor 5,10, 15,20-tetrakis(4 0 -isopropylphenyl) porphyrin (TIPP) was synthesized and investigated as an active material in sur- face-type multifunctional sensor. As electrodes, 100 nm thick Ag films were deposited on 25 mm 9 25 mm glass substrate with 40 lm gap between them. Thin film of TIPP of area 15 mm 9 15 mm was thermally sublimed to cover the gap between the silver electrodes. Thickness of TIPP film was 100 nm. A change in electrical resistance and capacitance of the fabricated device was observed with the increase in relative humidity (RH), temperature, and illu- mination. Hysteresis, response, and recovery times were investigated over a wide range of RH (0–94%). Activation energy of the TIPP was estimated. An equivalent circuit of the Ag/TIPP/Ag humidity, temperature, and illumination sensor was developed. Humidity, temperature, illumination dependent capacitive, and resistive properties of this sensor make it promising for use in a humidity, temperature, and lux multi-meters.
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