Dissertation > Excellent graduate degree dissertation topics show

The DAST crystal material synthesis and crystal growth

Author: YouFei
Tutor: XiaLinHua；ZuoBing
School: Qingdao University
Course: Condensed Matter Physics
Keywords: DAST Crystal Synthesis Structure Analysis Crystal Growth
CLC: O782.1
Type: Master's thesis
Year: 2011
Downloads: 13
Quote: 0
Read: Download Dissertation

Abstract


In this paper, the synthesis and purification of DAST (4-dimethylamino-N-methyl-4-stilbazolium tosylate) raw materials were introduced, the technology factor during the process were obtained. The crystal growth and surface morphology were analyzed in detail, the influence of different growth methods on DAST crystal shape was compared and summarized.DAST raw materials were synthesized and purified by means of a relatively simple method designed by ourselves in our laboratory, the cost of raw materials was cut down, since they were difficult to purchase and very expensive. The fourier transform infrared (FTIR) spectrum and nuclear magnetic resonance (NMR) were used to check the functional groups and molecular structure of raw materials, respectively. It was found that no extra functional groups and modes existed in the compound. It could be early proved that the product was DAST compound. DAST crystals were grown from the methanol solution with the synthesized raw materials by slow cooling method. The crystal structure was characterized by x-ray diffraction (XRD) method, the result showed that the structure of crystals was the same as that of DAST in the reference published before. It was showed that the quality of prepared raw materials could meet the requirements of crystal growth.DAST crystals have been grown by the slow cooling method and the evaporation method, respectively. The morphology of crystal surfaces was observed by the microscope and scanning electron microscope (SEM). Different growth striations were found on the growth surfaces. The arrangements of crystal ion groups and cooling rate had a great influence on the crystal shape. The two-dimensional nucleuses were observed on growth surface, which indicated there was the two-dimensional nucleation mechanism reacted on the growing process of DAST crystal. DAST crystals grown by different methods were tested by x-ray topography, and the crystal quality was analyzed. The fluorescence spectrum of DAST crystal was measured. It was showed that DAST crystal had fluorescence effect.

Related Dissertations

  1. Studies on the Synthesis and Technology of Dipentaerythritol and Its Derivative,TQ223.164
  2. Synthesis and Characterization on Semi-Aromatic Polyamides Containing Benzoxazole Units,O633.5
  3. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  4. Research on Autamatic Music Structrue Analysis,TN912.3
  5. Video Coding Research Based on Texture Characteristics,TP391.41
  6. Poetic alienation : graphics,J506
  7. Urothermal Synthesis, Structure and Characterization of Functional Coordination Polymers,O631.3
  8. The Total Synthesis of a Flavonoid Glycoside Apigenin-7-O-β-D-glucuronide,R284.1
  9. Atovaquone analogues Design, Synthesis and antitumor activity of,R914
  10. Synthesis and Seperation of 1,1’-binaphthol,O625.3
  11. Flexible,rigid,Synthesis and characterization of mixed ligand complexes,O621.1
  12. Synthesis and Performance Study of Bisphenol AP-based Polybenzoxazines,TQ320.1
  13. Study on the Synthetic Process of Vat Pink R,TQ616.2
  14. Study on the Mechanism of Night Temperature to Grain Filling of Inferior in Rice,S511
  15. Gold-catalyzed Addition Reaction of Sulfonates and Alkynes and Study of Synthesis and Bioactivity of (E)-3-phenyl-substituted Acrylic Acids,R914
  16. Study on Structral Analysis & Control Method of Generalized Ensemble,N945.1
  17. Synthesis and Identification of P22/P221 Polypeptides of IBDV Ligand Epitope and Screening CEF Library,S852.65
  18. The Properties and Synthesis of Photochromic Indole-Substituted Fulgides,O626
  19. Curing Mechanism and Properties of Fluorenyl Epoxy Resin,TQ323.5
  20. Study on Antioxidant Activities and Lipase-catalyzed Transesterification of Lard to Produce L-ascorbyl Fatty Acid Esters,TS202.3
  21. Syntheses of Novelbenzopyran Compounds Containing Fluorine and Induced Resistance to TMV,S435.72

CLC: > Mathematical sciences and chemical > Crystallography > Crystal growth > Crystal growth process > Solution method
© 2012 www.DissertationTopic.Net  Mobile