User:Moira M. Esson/Notebook/CHEM-581/2012/11/16: Difference between revisions
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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 | |||
|} | |||
==Observations== | |||
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Revision as of 17:07, 26 November 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:
Titration information:
Swelling for GA filmsGeneral Protocol for film swelling:
Color Change of porphyrin filmsGeneral protocol for color change of porphyrin films:
Observations |