Facchin M.

Perosa A.

Riello P.

Archivio Istituzionale della Ricerca

Life in hydrocarbons: membranes and vescicles in non-acqueous systems

Life in hydrocarbons: membranes and vescicles in non-aqueous systems

FACCHIN, MANUELA

PEROSA, Alvise

RIELLO, Pietro

Archivio istituzionale della ricerca - Università degli Studi di Venezia Ca' Foscari

Archivio Ricerca Ca'Foscari

HGIU
REFERENCES.
• Norman, L. H., Astronomy & Geophysics 2011, 52, 1.39-31.42 
• Schulze-Makuch, D., et al. "Microbial life in a liquid asphalt desert." Astrobiology 3: 241-258.(2011)
• The limits of Organic life in planetary systems, the National Academy Press, 
p
Target
M. Facchin, A. Perosa, P. Riello
Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia,
Centre for Sustainable Technologies, Calle Larga S.Marta, 2137-30123 Venezia, Italy.
Proposed reverse 
amphiphiles
Why not?
?
We need reverse amphiphilic 
molecules with a lipophilic head 
and one or two lipophobic tails
SAXS measures
in hydrocarbon solvent
Ongoing syntheses: 
double tail amphiphiles
Dependence of critical aggregation 
concentration 
on temperature (Sydney) and concentration .
Use of fluorophores, SAXS, and 
SANS to confirm the formation of 
double layer  vescicles
Next steps
FINAL TARGET
The idea
Why not consider the possibility of constructing 
membranes able to assemble in apolar systems such 
as an hydrocarbon system?
synthesized with high
purity (>98%)
PE
G
 T
ail
PE
G
 T
ail
PE
G
 T
ail
PE
G
 T
ail
2 PE
G
 T
ails
2 PE
G
 T
ails
2 PE
G
 T
ails
2 PE
G
 T
ails
HYPOTHESIS: 
formation of micelles
(Rg≈ 1,5nm)
LIFE IN HYDROCARBONS: MEMBRANES AND 
VESCICLES IN NON-AQUEOUS SYSTEMS
0,000 0,002 0,004 0,006 0,008 0,010
e
0
e
1
e
2
e
3
Ln(I)
h
2
[Å
-2
]
 50 mM    R
g
=1.1 nm
 75 mM    R
g
=1.2 nm
 100 mM  R
g
=1.3 nm
 150 mM  R
g
=1.5 nm
 300 mM  R
g
=1.5 nm
 400 mM  R
g
=1.5 nm
 1300 mM R
g
=1.4 nm
0,01 0,1
50
100
150
200
250
300
350
400
h[Å
-1
]
In
te
n
s
it
y
 hydrocarbon solvent
 50mM
 75mM
 100mM
 150mM
 300mM
 400mM
 1300mM
SAXS measures:
Guinier plot
the number of 
aggregates grow with the 
increasing of the 
surfactant
concentration


HGIUREFERENCES.• Norman, L. H., Astronomy & Geophysics 2011, 52, 1.39-31.42 • Schulze-Makuch, D., et al. "Microbial life in a liquid asphalt desert." Astrobiology 3: 241-258.(2011)• The limits of Organic life in planetary systems, the National Academy Press, pTargetM. Facchin, A. Perosa, P. RielloDipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia,Centre for Sustainable Technologies, Calle Larga S.Marta, 2137-30123 Venezia, Italy.Proposed reverse amphiphilesWhy not??We need reverse amphiphilic molecules with a lipophilic head and one or two lipophobic tailsSAXS measuresin hydrocarbon solventOngoing syntheses: double tail amphiphilesDependence of critical aggregation concentration on temperature (Sydney) and concentration .Use of fluorophores, SAXS, and SANS to confirm the formation of double layer  vesciclesNext stepsFINAL TARGETThe ideaWhy not consider the possibility of constructing membranes able to assemble in apolar systems such as an hydrocarbon system?synthesized with highpurity (>98%)PEG TailPEG TailPEG TailPEG Tail2 PEG Tails2 PEG Tails2 PEG Tails2 PEG TailsHYPOTHESIS: formation of micelles(Rg≈ 1,5nm)LIFE IN HYDROCARBONS: MEMBRANES AND VESCICLES IN NON-AQUEOUS SYSTEMS0,000 0,002 0,004 0,006 0,008 0,010e0e1e2e3Ln(I)h2[Å-2] 50 mM    Rg=1.1 nm 75 mM    Rg=1.2 nm 100 mM  Rg=1.3 nm 150 mM  Rg=1.5 nm 300 mM  Rg=1.5 nm 400 mM  Rg=1.5 nm 1300 mM Rg=1.4 nm0,01 0,150100150200250300350400h[Å-1]Intensity hydrocarbon solvent 50mM 75mM 100mM 150mM 300mM 400mM 1300mMSAXS measures:Guinier plotthe number of aggregates grow with the increasing of the surfactantconcentration

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Life in hydrocarbons: membranes and vescicles in non-aqueous systems

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Archivio istituzionale della ricerca - Università degli Studi di Venezia Ca' Foscari

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Archivio istituzionale della ricerca - Università degli Studi di Venezia Ca' Foscari

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