User:Moira M. Esson/Notebook/CHEM-581/2012/11/16: Difference between revisions
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| PVOH(22K) 1.0073+1.0mL GA+1mL porphyrin prepared 10/24||0.79 | | PVOH(22K) 1.0073+1.0mL GA+1mL porphyrin prepared 10/24||0.79 | ||
|- | |- | ||
| PVOH(22K) 1. | | PVOH(22K) 1.0067g+0.5mL GA+1mL porphyrin prepared 10/26||1.01 | ||
|- | |- | ||
| PVOH(22K) 1.0067g+1mL GA+1mL porphyrin||1.27 | | PVOH(22K) 1.0067g+1mL GA+1mL porphyrin||1.27 | ||
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| PVOH(22K) 1.05225g+ 0.5mL GA+1mL porphyrin prepared 10/24||0.8 | | PVOH(22K) 1.05225g+ 0.5mL GA+1mL porphyrin prepared 10/24||0.8 | ||
|} | |} | ||
==Standardization of sodium bicarbonate== | ==Standardization of sodium bicarbonate== | ||
New weights of PHP used: | New weights of PHP used: | ||
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| 3||1.13518 | | 3||1.13518 | ||
|} | |} | ||
<br> | <br> | ||
Titrations for sodium bicarbonate solution: | |||
{| {{table}} | {| {{table}} | ||
| align="center" style="background:#f0f0f0;"|'''Trial number''' | | align="center" style="background:#f0f0f0;"|'''Trial number''' | ||
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| 3||19.2||29||9.8 | | 3||19.2||29||9.8 | ||
|} | |} | ||
==Acetylation== | |||
Titration information for acetylation: | |||
*The general protocol for titrations was used. The sodium bicarbonate solution prepared[[User:Moira_M._Esson/Notebook/CHEM-581/2012/11/09|2012/11/09]] was used as the base. Three drops of bromothymol blue was added each PHP solution. | |||
<br> | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trail Number''' | |||
| align="center" style="background:#f0f0f0;"|'''Initial Volume(mL)''' | |||
| align="center" style="background:#f0f0f0;"|'''Final Volume(mL)''' | |||
| align="center" style="background:#f0f0f0;"|'''Total volume(mL)''' | |||
|- | |||
| 1||0.5||42.5||42 | |||
|- | |||
| 2||0||43.2||43.2 | |||
|- | |||
| 3||0.1||42.8||42.7 | |||
|} | |||
==Swelling for GA films== | ==Swelling for GA films== | ||
General Protocol for film swelling: | General Protocol for film swelling: | ||
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==Color Change of porphyrin films== | ==Color Change of porphyrin films== | ||
General protocol for color change of porphyrin films: | |||
#Remove film from deionized H<sub>2</sub>O and gently pat dry. | |||
#Cut film into 3 equivalent pieces | |||
#Place film pieces in 2 wt% H<sub>2</sub>SO<sub>4</sub> until the film turns completely green | |||
#Remove film pieced from the H<sub>2</sub>SO<sub>4</sub> and place the films into three separate beakers. | |||
#In each beaker add ~20mL of salt solution. (Each beaker will be filled with a different 10mM salt solution) | |||
#Once salt solution is added to the beaker, start a timer. Record the time that the film turns from green to pink. | |||
#Run UV-vis on the now pink films following the general protocol for UV-vis porphyrin films. | |||
<br> | |||
*Time neeeded to change the color of the film PVOH(22K) 1.0067g+1mL GA+1mL porphyrin | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Salt solution''' | |||
| align="center" style="background:#f0f0f0;"|'''Total time in solution(min)''' | |||
|- | |||
| Fe2(SO4)3||27 | |||
|- | |||
| Al2(SO4)3||54 | |||
|- | |||
| Na2SO4||45 | |||
|} | |||
<br> | |||
*UV-vis film information | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Salt solution film was stored''' | |||
| align="center" style="background:#f0f0f0;"|'''Film thickness(mm)''' | |||
|- | |||
| Fe2(SO4)3||1.42 | |||
|- | |||
| Al2(SO4)3||1.11 | |||
|- | |||
| Na2SO4||1.24 | |||
|} | |||
Note: Two films that will be tested for color change were stored in 2wt% sulfuric acid. These films will undergo color change testing next time. The two films are: | |||
#2.4394 PVOH(22K)+0.5mL GA+0.99mL porphyrine | |||
#1.02114g PVOH(22K)+0.5mL+1mL porphyrine | |||
==Observations== | |||
*PVOH(22K) crosslinked GA+NaMT that was placed in Na<sub>2</sub>SO<sub>4</sub> [[User:Moira_M._Esson/Notebook/CHEM-581/2012/11/14|2012/11/14]] completely dissolved. The solution was very cloudy and almost had a powdery look. | |||
*PVOH(22K) crosslinked GA+NaMT that was placed in CuSO<sub>4</sub> [[User:Moira_M._Esson/Notebook/CHEM-581/2012/11/14|2012/11/14]] completely dissolved. | |||
*PVOH(22K) crosslinked GA that were placed in Na<sub>2</sub>SO<sub>4</sub> and CuSO<sub>4</sub> [[User:Moira_M._Esson/Notebook/CHEM-581/2012/11/14|2012/11/14]] were completely intact. This indicates that surfactant clay promotes the dissolution of films in salt solution. | |||
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Revision as of 23:13, 10 December 2012
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Objectives
UV-vis porhyrin filmsGeneral protocol for UV-vis on porphyrin films:
Standardization of sodium bicarbonateNew weights of PHP used:
AcetylationTitration information for acetylation:
Swelling for GA filmsGeneral Protocol for film swelling:
Color Change of porphyrin filmsGeneral protocol for color change of porphyrin films:
Note: Two films that will be tested for color change were stored in 2wt% sulfuric acid. These films will undergo color change testing next time. The two films are:
Observations
|