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Thesis Details
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TITLE
CERTIFICATE
DEDICATION
DECLARATION
ACKNOWLEDGEMENT
CONTENTS
I. INTRODUCTION AND OBJECTIVES
II. POLYMERIC REAGENTS: CONCEPTS AND CHARACTERISTICS
1. The Polymer Support
2. Chemical Modification of the Supports
3. Swelling Characteristics
4. Monitoring of Polymer-Supported. Reactions
5. Advantages and Limitations of Polymer-Supported Reactions
6. Nature of the Polymer Backbone
7. Molecular Character and Extent of Cross linking
8. Separation between the Polymer Matrix and Reactive Functions
9. Polymer-Supported Oxidising Reagents
III. EXPERIMENTAL
1. Preparation of Cross linked Polyvinyl Pyrrolidones
2. Preparation of Polyvinyl pyrrolidone-Bromine Complexes
3. Determination of the Capacity of the Poly (vinyl pyrrolidone) -Bromine Complex
4. Oxidation and Bromination Using Linear Poly (vinyl pyrrolidone) - Bromine Complex
5. Oxidation and Bromination Reactions Using Cross linked PVP-Br
6. Characterization of the products
7. Monitoring the Course of Oxidation Reactions
8. Investigation of the Effect of Cross linking on the Extent of oxidation
9. Effect of Solvent
10. Effect of Molar Excess of the Reagent
11. Recycling and Reuse
12. Preparation of Tetraethyleneglycol Diacrylate Cross linked Polystyrene
13. Preparation of Polystyrene-PEG Graft Copolymer
14. Preparation of Acid Ester Resin from PS-PEG Resin
15. Preparation of the Ketonic Acid Resin
16. Preparation of Carboxylic Acid Resin
17. Preparation of the Acid Chloride Resin
18. Preparation of Malonic Ester Resin
19. Hydrolysis of the Malonic Ester Resin
20. Preparation of t-Alcohol Resin
21. Preparation of t-Butyl Hypochlorite Resin
22. Estimation of Carboxylic Groups
23. Estimation of Chlorine in the Acid Chloride Resin
24. Estimation of Chlorine in the Hypochlorite Resins
25. Synthetic Reactions Using t-Butyl Hypochlorite Resins
26. Swelling Studies of PS-PEG Resins
27. Thermogravimetry
28. 13C-CP / MAS NMR
IV. RESULTS AND DISCUSSION
1. Polyvinylpyrrolidone-Supported Reagents: Preparation and Characterization
a. Preparation of PVP-Br Complex
b. Characterization of Linear PVP-Br
c. Preparation and Characterization of Cross linked Poly vinyl pyrrolidones
Fig. IV. 7 Scanning electron micrograph of 3%DVB-crosslinked PVP
Fig. IV. 10. Scanning electron micrograph of 3%TTEGDA-crosslinked PVP
d. Preparation of Bromine Complexes of Cross linked.Poly vinylpyrrolidones
e. Characterization of Cross linked PVP-Br Resins
a. Characterization of NNMBA-crosslinked PVP-Br
b. Characterization of DVB-Crosslinked PVP-Br
Fig IV Scanning electron micrograph of 3%DVB-crosslinked PVP-Br
Fig.IV.14 Scanning electron micrograph of 3%DVB-crosslinked PVP-Br
c. characterization of TTEGDA-Crosslinked PVP-Br
2. Oxidation and Halogenation Reactions Using Linear Poly vinylpyrrolidone Bromine Complexes
a. Oxidation of alcohols
b. Bromination
3. Effect of Reaction conditions on the Course of Oxidation Reactions
a. Solvent
b. Concentration of the Reagent Function
4. Recyclability of the Spent Reagent
5. Preparative Conversions Using Cross linked Polyvinylpyrrolidone Bromine Complexes
a. Reactions Using NNMBA-Cross linked Polyvinylpyrrolidone-Bromine Complexes
b. Synthetic Reactions Using DVB-Cross linked Polyvinylpyrrolidone Bromine Complexes
c. Synthetic Reactions Using TTEGDA Cross linked Polyvinylpyrrolidone Bromine Complexes
d. Selectivity
6. Recycling, Reuse and Stability of the Reagents
7. Investigation of Reactivity of Polyvinylpyrrolidone-Bromine Complexes
a. Nature of the Support
b. Effect of Cross link Density
c. Effect of Solvent
d. Effect of Concentration of the Reagent
8. t-Butyl Hypo chlorite Functions Supported on PEG-Grafted Polystyrene
a. Preparation of Polystyrene-PEG Graft Copolymer
b. Swelling Studies of PS-PEG Resin
c. Preparation of t--Butyl Hypo chlorite Reagent from PS-PEG
d. Synthetic Reactions
e. Comparison with t-Butyl Hypochlorite Supported on DVB-Cross linked Polystyrene
f. Effect of Solvent
g. Recyclability
9. t-Butyl Hypochlorite Reagent Function on TTEGDA-Cross linked Polystyrene
a. Preparation of Tetraethyleneglycol Diacrylate-Cross linked Polystyrene
b. Incorporation of t-Butyl Hypochlorite Function to TTEGDA-Cross linked Polystyrene
c. Oxidation Reactions with TTEGDA-Cross linked Polystyrene Supported Hypochlorite
d. Investigation of the Reactivity of the Reagent
e. Recyclability
V. CONCLUSION AND OUTLOOK
VI. REFERENCES