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 Project name
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Objectives
- Crosslink porphyrin films
- Run AA using film adsorption
- Prepare next highest porphyrin concentration solution. Then add salts to these higher porphyrin solutions
- Run UV-vis on film adsorption and porphyrin-salt solutions
Crosslinking
- The general protocol for porphyrin film crosslinking described on 2012/09/14 was followed for the films listed below
Films Crosslinked:
- PVOH(22K) 1.0073g+1.0mL GA+1mL porphyrin
- PVOH(22K) 1.05225g+1.0mL GA+1mL porphyrin
Crosslinking information
| Films
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Amount of fixant solution used to crosslink(mL)
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Amount fixant solution kept in vial(mL)
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Amount of 1% aqueous HCl solution used to crosslink(mL
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Amount HCl solution saved in vial(mL)
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Amount of 0.2M sodium bicarbonate used(mL)
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Amount sodium bicarbonate solution saved(mL)
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Mass of film after crosslinking(g)
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| PVOH(22K) 1.0073g+1.0mL GA+1mL porphyrin |
99.95 |
13 |
100 |
14 |
100 |
12 |
1.4974
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| PVOH(22K) 1.05225g+1.0mL GA+1mL porphyrin |
101 |
12 |
98 |
13 |
99.8 |
12 |
1.9251
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- For the films listed below, the films were placed in a 6M NaCl solution at 70°C for ~1.5 hours
Crosslinked Films:
- PVOH(22K) 1.02114g+0.5mL GA+1mL porphyrin+HCl
- PVOH(22K) 1.0067g+1mL GA+1mL porphyrin+HCl
Crosslinking information:
| Films crosslinked
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Amount of NaCl added(g)
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Amount 6M NaCl solution used(mL)
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Amount NaCl solution saved(mL)
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Mass of film after crosslinking(g)
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| PVOH(22K) 1.02114g+0.5mL GA+1mL porphyrin+HCl |
0.3576 |
100 |
12 |
1.7781
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| PVOH(22K) 1.0067g+1mL GA+1mL porphyrin+HCl |
0.363 |
99 |
12 |
1.5672
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Observations for crosslinking films
- PVOH(22K) 1.02114g+0.5mL GA+1mL porphyrin+HCl was shrunken, shriveled and was green in color before crosslinking
- PVOH(22K) 1.0067g+1mL GA+1mL porphyrin+HCl shrunk, looked shriveled and was green in color before crosslinking
- PVOH(22K) 1.0073g+1.0mL GA+1mL porphyrin was flat, relatively shiny and pink in color before crosslinking
- PVOH(22K) 1.05225g+1.0mL GA+1mL porphyrin was flat, shiny and pink in color before crosslinking
- When added film to fixant solution both beakers of solution had some color leak out. Color of both beakers were yellowish/greenish. Film with 1mL GA not as colored. Film with 0.5mL GA seems to be a more vibrant color(leaking more)
- NaCl solution with film with 0.5mL GA had very slight leaking(slight discoloration of solution very light green). Coloration of solution was occurring very gradually
- Both films after fixant solution were a vibrant green color(like jolly rancher green). Film with 1.0mL GA was a darker/ more vibrant green
- Films placed in 1% aqueous HCl soltn. both started to have color leak out
- 1.0mL GA+HCl film when placed in the 6M NaCl solution leaked very minimally(solution looks very faintly green). Much less in comparison to 0.5mL GA.
- 0.5mL GA+HCl film after 1hr. and 15min. heated , remained bright green color. Stored in H2O. After adding H2O, film turned into a pink color(darker pink on edges)
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