photoactive nanoscale devices and machines · photoactive nanoscale devices and machines xi...
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Alberto CrediCenter for Light Activated NanostructuresDipartimento di Scienze e Tecnologie Agro-alimentari, Università di Bologna, and Istituto per la Sintesi Organica e la Fotoreattività,Consiglio Nazionale delle Ricerche, Bologna, Italy
[email protected] www.credi-group.it
Photoactivenanoscaledevicesandmachines
XIInternationalSchoolofOrganometallic ChemistryFromTheory toApplications
SanBenedettodelTronto,2-6September 2017
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Weigth: ca.30tN.tubes: 19000Powerconsumption: 200kW
ENIAC:thefirstelectroniccomputer(1944) Integratedmicroprocessor(today)
Weigth: ca.2kgPowerconsumption: ca.60W(CPU)
N.transistors: 1.4billions*Elementssize(min): 25nm*
* Intel i7 quad core processor (22-nm lithography), released Q3 2013. See http:\\ark.intel.com
Whyminiaturization?
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Wiley,New
York,200
4Cells have hundreds of different types of molecular motors, each specialized for a particular function.Many biological motor-like proteins have been discovered and characterized in recent years.
Naturallyoccurringmolecularmachines
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molecularcomponents
simple acts
multicomponent(supramolecular)
system
function
V. Balzani, A. Credi, M. Venturi, PNAS 2002, 99, 4814; Chem. Eur. J. 2002, 8, 5524
Artificialmoleculardevices
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M. Fujita et al. J.F. Stoddart et al.
J.-P. Sauvage et al.
Complexsyntheticstructures
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ENERGY FUNCTION
MonitoringsignalsLight
Artificialmoleculardevices:theroleoflight
Multicomponent(supramolecular)
system
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SUN
livingmatter
photosyntheticprocesses
vision-relatedprocesses
ENERGYfor life
INFORMATIONfor life
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• Devices forsignal (information)processingWires,plug/socket devices,electrical extension cable systems,antennas,sensors,switches,logic gates,...
•Mechanicaldevices(molecularmachines)Tweezers,shuttles,muscles,valves,rotarymotors,...
• DevicesforharvestingandconvertinglightenergyLightharvestingantennas,wires,charge-separationdevices,...
Artificialmoleculardevices
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Wiley-VCH, Weinheim, Germany, 2003
Wiley-VCH, Weinheim, Germany, 2008
Mechanicalmolecularmachines
D.A.Leighetal.Angew.Chem.Int.Ed. 2007,46,72Chem.Rev. 2015,115,10081
S.Silvi,M.Venturi,A.Credi,J.Mater.Chem. 2009,19,2279;Chem.Commun. 2011,47,2483(featurearticles)
C.Bruns,J.F.Stoddart,TheChemistryoftheMechanicalBond–FromMoleculestoMachines,Wiley,NewYork,2016
Informationprocessingdevices
A.P.deSilva,S.Uchiyama,NatureNanotech. 2007,2,399
K.Szacilowski, Chem.Rev. 2008,108,3481
V.Balzani,A.Credi,M.Venturi, Chem.Eur.J. 2008,14,26
A.P.deSilva,MolecularLogic-basedComputation,RSCPublishing,Cambridge,2012.
Artificialmoleculardevices
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Informationprocessingdevicesbasedontransitionmetalcomplexes
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N N
N
N
Ru2+ N N
N
N
Ru
N N
N
N
Ru2+ N NH+N
N
+HN N
N
N
Ru2+ N NH+N
N
+ H+
+ H+
- H+
- H+
RuH+
RuH22+
Inorg.Chim.Acta 2007,360,1102
l (nm)
600 650 700 750 800 850 900
I (a.u.)
0.0
0.4
0.8
1.2
l (nm)
300 400 500 600 700 800
Abs
0.0
0.3
0.6
0.9
eq acid0 1 2 3 4
A498
0.30
0.35
MeCN, RT
PaoloPassaniti,SerenaSilvi WithEdConstable,UniversityofBasel
Anacid-basecontrolledluminescentswitch
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0 0 0 0 1
0 1 0 1 0
1 0 0 1 0
1 1 1 1 1
In1 In2 Out740 Out740 Out630In1 = H+
In2 = H+
Out = hn
AND
OR
XNOR
AND
OR
XNOR
Ru
RuH+
RuH22+
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NH+
MH+
hn
DA (stateA)
DB (stateB)
+H+ – H+
Molecular Switch2Molecular Switch1
- pKa(NH+)<pKa(DA)<pKa(MH+)
- compatibilityofconditions- nofurtherchemicalinteractionsbetweenMS1andMS2
- nointerferenceofinput/outputsignals- correcttimingoftheswitchingprocesses
communicationofachemicalsignal(H+ ions)
PhotochemicaloperationofpH-controlledmolecularswitches
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N O NO2
OHSP
+H+,dark
Visible LightN+
OH
HO
NO2
MEH+
l (nm)300 400 500 600
A
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
SP
MEH+
MeCN, RT
SerenaSilvi
Thespyropyran/merocyanine photochromicsystem
WithFrançisco Raymo,UniversityofMiami
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l / nm
600 700 800 900
I
0
1
2
3
4
5
+HN N
N
N
Ru2+ N NH+N
N
N O NO2
OH
2SP
N N
N
N
Ru2+ N N
N
N
Ru RuH22+
2H+
D
2H+hn
2N+
OH
HO
NO2
2MEH+
2
MeCN, RT
Coupledoperationofthetwoswitches
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+HN N
N
N
Ru2+ N NH+N
N
N O NO2
OH
N N
N
N
Ru2+ N N
N
N
2
++
N N
N
N
Ru2+ N NH+N
N
SP MEH+
++
D
D
+hn
++hn
2
MeCN, RTChem.Eur.J. 2009,15,178
Photocontrol ofmolecularlogicgateoperation
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630 nm 740 nm
I
0
1
2
3
4
00 10 00 01 00 11
0 0
0 1
1 0
1 1
In1 In2 Out
0
0
0
1
AND
Out
0
1
1
1
OR
Lum
ines
cenc
e in
tens
ity (a
.u.)
Chem.Eur.J. 2009,15,178
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I
0.0
0.1
0.2
0.3
0.4
00 10 00 01 00 11
0 0
0 1
1 0
1 1
In1 In2 Out
1
0
0
1
XNOR
630 nm 740 nm
Chem.Eur.J. 2009,15,178
Lum
ines
cenc
e in
tens
ity (a
.u.)
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Luminescenceof the Oscomplex
1O2 luminescence
Chem.Commun. 2009,1484
lirr = 450 nm
t = 120 ns t = 20 ns
Photochemicalswitchingofluminescenceand1O2 generation
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Nanoscale devicesbasedonsemiconductornanocrystal quantumdots