Synthesis of Conjugated P olymers from Surface Confined Highly Reactive Butadiyne Derivatives
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Synthesis of Conjugated Polymers from Surface Confined Highly Reactive
Butadiyne Derivatives
Tobe labratoryDaichi Ando
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O
OH
NHN
N
NHN
NN
N
IntroductionTopochemical Polymerization
10,12-Nonacosadiynoic acid
Phthalocyanine
STM Tip
Okawa, Y.; Aono, M. J. Am. Chem. Soc. xxxx, xxx, 000-000.
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Contents
・ STM ( Scanning Tunneling Microscope )
・ Self-Assembly
・ Radical Polymerization
・ Background and Purpose of my project
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STM Observations of Nanostructure
Graphite Surface
Au(111) Surface
1nm
1nm
Ore of Gold (金の原石)
Graphite
STM
PicoSTM (Agilent)
Nanoscope IIIa (Digital Instruments)
@Tobe lab.
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Scanning Tunneling Microscopy (STM)
e -
V
I
d d
I
Quantum Tunneling d
STM schematic diagram
I = Ve-cd
Tip
Surface: Ag(111)
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What’s Self - Assembly ?
Water Droplets on Cold Glass Surface Product of Alum( ミョウバン )
⊿S>0 Intermolecular Interaction
Disorder Order
<
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Hydrogen bonding
Self-Assembly
van der Waals interaction
2D nano-architectures are constructed by molecular self-assembly.
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+ +
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+ +Heckl, W. M. et al. Single Mol. 2002, 3, 25. Charra, F. et al. Nano Lett. 2006, 6, 1360.
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Hydrogen bond
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Intermolecular interaction-Hydrogen bond-
Lackinger, M.; Griessl, S.; Heckl, W. M.; Hietschold, M.;Flynn, G. W.; Langmuir, 2005, 21, 4984.
Honeycomb( 蜂の巣 )
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Intermolecular interaction-Van der Waals interaction-
Van der waals interaction
Bléger, D.; Kreher, D.; Mathevet, F.; Attias, A.-J.; Schull, G.; Huard, A.; Douillard, L.; Fiorini-Debuischert, C.; Charra, F. Angew. Chem. Int. Ed. 2007, 46, 7404–7407.
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CH
CHH2C
CH2 CHCH2 CH2 CH
CHH2C
CH2 CH CH2 CHCH
A B A B
Homlytic Cleavage ( ホモリシス開裂 )
Radical Polymerization ( ラジカル重合 )
Radical
Radical Polymerization
R2
R1
R2
R1
R2
R1
R2
R1R1
R2
R1
R2
R1
R2
R1
R2
Radical
Stylene
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Topochemical Polymerization of Butadiyne Derivatives on Surface
Okawa, Y.; Aono, M. J. Chem. Phys. 2001, 115, 2317-2322.
Monomer molecule
Chain propagation
O
OH
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R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
RR
R
e-
e-
Previous ResearchOctaehydrobenzo[12]annulene Derivatives
Polymerization
Octadehydrobenzo[12]annulene (DBA)
Tobe, Y. et al. Chem. Eur. J. 2010, 16, 8319-8328.
5.9 – 6.1 nm
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Purpose of This work
external stimuli
C18H17O
C18H17O
OC18H17
OC18H17
C18H17OHO OC18H17
OH
C18H17OHO OC18H17
OHC18H17O
HO
OC18H17
OH
C18H17OHO
OC18H17
OH
OHOC18H17C18H17O
HO
C18H17OHO
OHOC18H17
C18H17OHO OC18H17
OH
C18H17OHO OC18H17
OH C18H17OHO OC18H17
OH
C18H17OHO OC18H17
OH
Polymerization
PolyaceneRadical Intermediate
Previous Subject Following Subject
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Snowflake Feather of Peafowl
Zebra’s pattern
Heartbeat
What’s Self - Assembly ?
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Topochemical Polymerization of Butadiyne Derivatives on Surface
Okawa, Y.; Aono, M. J. Chem. Phys. 2001, 115, 2317-2322.
Monomer molecule
hn
Electronic excitation
Vibration excitation
Addition reaction
Chain propagation
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Dehydrobenzo[12]annulene Derivatives
Zhou, Q.; Carrol, P. J.; Swager, T. M. J. Org. Chem. 1994, 59, 1294-1301.
1a: R = C10H21
1b: R = OC12H25
1c: R = OC14H29
1d: R = OC16H33
1e: R = OC18H37
1f: R = OC20H41
Polymerization
Octadehydrobenzo[12]annulene (DBA) 1
1a
Tobe, Y. et al. Chem. Eur. J. 2010, 16, 8319-8328.
5.9 – 6.1 nm
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hn or pulse voltage