Dissertation > Excellent graduate degree dissertation topics show

Study on the Synthesis and Properties of Metal Hexadecafluorophthalocyanines

Author: MaFeng
Tutor: LiXiangGao
School: Tianjin University
Course: Applied Chemistry
Keywords: Organic semiconductors Organic thin film transistors Metalhexadecafluorophthalocyanines Mobility tetrafluorophthalonitrile
CLC: O621.3
Type: PhD thesis
Year: 2012
Downloads: 121
Quote: 0
Read: Download Dissertation

Abstract


Organic semiconductor material is an important part of the field-effect transistors,and its properties directly affect the mobility of the OTFTs devices. To date, most ofthe organic semiconductor materials are the p-type materials, while the n-type organicsemiconductor materials are relatively rare. However, the n-type organicsemiconductor materials are the important part of pn junction diodes, bipolartransistors and complementary CMOS circuits. Therefore, the development of n-typeorganic semiconductor materials has a very significant. Phthalocyanine compoundswith18π electron conjugated structure and good thermal stability and easy to vacuumdeposition film are good semiconductor materials for the preparation of organic thinfilm transistors. In this thesis, the p-type metal phthalocyanine semiconductorsmaterials will be transformed into the n-type organic semiconductors by theintroduction of containing-F substituent, and these n-type materials will be applied inOTFTs.First, the tetrafluorophthalonitrile is synthesized using tetrafluorophthalicanhydride as a raw material by imidization, ammonification and dehydration reactionand the synthetic process is optimized. In optimum conditions, the total yield oftetrafluorophthalonitrile is46.71%and the purity is98.83%. The single crystal oftetrafluorophthalonitrile is obtained and its structure is analyzed. The crystal isattributed to orthorhombic system and its space group is P212121.The seven kinds of metal hexadecafluorophthalocyanines MPcF16（M=Fe、Co、Ni、Cu、Zn、VO and SnCl2） were synthesized using tetrafluorophthalonitrile and metalsalts as raw materials through the liquid and solid state reaction and their structurewere characterized by IR, UV-Vis and MALDI-TOF-MS.The UV-vis absorption and fluorescence emission spectra of the target productwere studied. The maximal absorption peaks in the range of665716nm was obtainedin the o-dichlorobenzene solutions, while the maximal absorption wavelength ofmetal hexadecafluorophthalocyanines in N, N-dimethylformamide was at654702nm.With the polarity of solution enhanced, the UV-vis absorption spectrum blue-shifted,and molecular aggregation behavior occurred in a polar solvent. The maximumemission peak of metal hexadecafluorophthalocyanine in o-dichlorobenzene were at680750nm. The fluorescence quantum of Zinc hexadecafluorophthalocyanine was0.67. Thermal analysis showed that the weight loss temperatures of metalhexadecafluorophthalocyanine were higher and their thermal stability was good. Cyclic voltammetry measurement showed that these compounds had LUMO energyvalue in the range of-4.64-4.57eV, which is conducive to electron injection andmatching to the work function of the metal electrodes Au, such as the preparationn-channel field-effect devices may be provided. These properties indicate thatperfluorinated metal phthalocyanine can be candidates for the application in OTFTs asorganic semiconductor materials.Metal hexadecafluorophthalocyanines were applied in OTFTs by weak epitaxialfilm-forming technology, and high quality semiconductor thin films were obtained.The phthalocyanine molecules were approximately standing-up on the inducing layerand their intermolecular π-π conjugated direction was parallel to the base due to theintroduction of p-6p inducing layer. Devices prepared in this thesis, the field-effectmobility of OTFTs based on CuPcF16is reach to0.07cm2/v s.

Related Dissertations

  1. The Changes and Their Clinical Significance of High-Mobility Group Box 1 Protein and Hypersensitive C-Reactive Protein in Patients with Coronary Heart Disease,R541.4
  2. High mobility of remote sensing satellite ground receiving and processing system design and key technology research,V423.43
  3. Study of the Guanidine Fracturing Fluid System with Low Concentration,TE357
  4. Research and Application of Deep Profile Control & Oil Displacement by GEL in High-temperature Oilfield,TE357.46
  5. The Availability, Lability and Mobility of Liquid P Fertilizer on Calcareous Soil under Fertigation Condition,S158
  6. The Expression and Significance of HMGB1、RAGE and VEGF in the Tissues of Children Wilms’ Tumor,R737.11
  7. Correlation between HMGB1 and Cervical Cancer Metastasis,R737.33
  8. Experimental Studies of High Mobility Group Protein B1 Impact on Cryoimmunologic Reaction in Prostate Cancer,R737.25
  9. Expression and Significance of HMGB1、NF-κBp65 and MMP-9 in Non-small Cell Lung Cancer,R734.2
  10. Gear shaft forging organization and flow pattern simulation and analysis of die wear,TG316
  11. The Effects of Stock Index Futures on the Stock Market,F224
  12. China’s Foreign Exchange Market-maker System Operating Effect,F832.52
  13. The Study of the Influence of the GaN Thin Film Dislocations on the Carrier Properties,TN304.055
  14. Study on the Trends of Mobile Reading and the Strategy of Publishing Development,G237.6
  15. Social mobility of migrant lifestyle changes Perspective,C912.82
  16. Xuebijing lung injury in rats with severe acute pancreatitis protective mechanism of action,R285.5
  17. Effect of High Mobility Group Box 1 on the Damage of Colonic Mucous Barrier with Ulcerative Colitis in Mice,R574.62
  18. Seamless Mobility between CDMA2000-1X and WLAN,TN929.533
  19. Study on Social Routing Algorithm in Delay and Disruption Tolerant Networks,TN92
  20. Communication Performance Evaluation of Active/Passive Routing Protocol under Different Mobility Model of VANET in High-density Urban,TN915.04
  21. Research of GPRS/EGPRS Network Optimization,TN929.5

CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Synthetic organic chemistry
© 2012 www.DissertationTopic.Net  Mobile