Cette publication est accessible gratuitement



zur Erlangung des akademischen Grades eines
Doktors der Naturwissenschaften (Dr. rer. nat.) im Fach Chemie
der Fakultät für Biologie, Chemie und Geowissenschaften der
Universität Bayreuth

vorgelegt von
Roland Walker
geboren in Illertissen

Bayreuth, 2010

Die vorliegende Arbeit wurde in der Zeit von Dezember 2006 bis Mai 2010 am
Lehrstuhl Makromolekulare Chemie I der Universität Bayreuth unter der
Betreuung von Herrn Prof. Dr. Hans-Werner Schmidt angefertigt.

Vollständiger Abdruck der von der Fakultät für Biologie, Chemie und
Geowissenschaften der Universität Bayreuth genehmigten Dissertation zur
Erlangung des akademischen Grades Doktor der Naturwissenschaften
(Dr. rer. nat.).

Amtierender Dekan: Prof. Dr. Stephan Clemens
Tag des Einreichens der Dissertation: 17. September 2010
Tag des wissenschaftlichen Kolloquiums: 07. Dezember 2010

Prof. Dr. Hans-Werner Schmidt (Erstgutachter)
Prof. Dr. Axel H. E. Müller (Zweitgutachter)
Prof. Dr. Andreas Fery (Vorsitzender)
Prof. Dr. Lothar Kador

„Die haben viel gemacht, die letzten Jahre!“
Würdigung des Alumnivereins
der Chemie CSG e. V.,
Die Chemiker Spass Gesellschaft
(Orginalzitat übernommen
von Dr. Marc Claudius Schrinner)

Abbreviations and symbols
45° electric field vector at an angle of 45° to the plane of incidence
AFM atomic force microscopy
BS beam splitter
CCD charge-coupled device
CD compact disc
CD-R CD-recordable
CD-RW CD-rewritable
d doublet
dd doublet of a doublet
d thickness of the film 0
Δd maximum SRG height
DMF N,N-dimethylformamide
DSC differential scanning calorimetry
DVD digital versatile disc
δ chemical shift in ppm

E electric field vector of the incident light
f gradient force
GPC gel permeation chromatography
GPM general preparation method
h Plank constant
HOE holographic optical element
I intensity
l intensity of the first order diffracted beam 1
l intensity of the transmitted beam before writing a hologram 0
J coupling constant in Hz
st stJ Bessel function of 1 kind and 1 order 1
k absorption coefficient
k Boltzmann constant b
λ wavelength of laser beam
lcp left circular polarized light
m multiplet
M molar
M number average molecular weight n
M weight average molecular weight w
η diffraction efficiency
n refractive index of the sample
n.d. not detected
n refractive index modulation 1
n maximum refractive index modulation 1, max
Δn amplitude of the refractive index change between sample and air
NMR nuclear magnetic resonance
ν frequency
OD optical density
p electric field vector parallel to the plane of incidence
P polarizer
P polarization induced by the electric light field
PDI polydispersity index
PDMS poly(dimethyl)siloxane
POLMIC polarizing light microscopy
PS polystyrene
rcp right circular polarized light
ROM read-only memory
RT room temperature
s electric field vector perpendicular to the plane of incidence
s singulet
S sensitivity
S maximum sensitivity max
SRG surface relief grating
τ time constants of the build-up of the volume grating 1
τ time constants of the build-up of the surface relief grating 2
t writing time to the maximum of n max 1
t triplet
T temperature
T glass transition temperature g
T melting point m
T crystallization temperature cryst
TGA thermogravimetric analysis
THF tetrahydrofuran
UV/Vis ultraviolet/visible
WORM write-once read-many
θ angle of incidence of the laser beam
Δφ phase difference between volume and surface relief grating
χ electrical susceptibility

Summary 1
Zusammenfassung 3
1. Introduction 6
1.1 Data storage media 6
1.2 Holography 11
1.3 Materials for holographic data storage 14
1.4 Azobenzene chromophores 15
1.5 Azobenzene-containing polymer systems 18
1.6 Inscription of holographic gratings 19
1.7 Surface relief gratings 23
1.8 Molecular glasses 24
2. Aim of the thesis 33
3. Synopsis 35
4. Publications & Manuscripts 47
4.1 Individual contributions to joint publications 47
4.2 Controlled formation of surface relief nanostructures 49
4.3 Polarization dependence of surface relief gratings 75
4.4 Holographic investigations of azobenzene-containing materials 94
4.5 Improving the sensitivity of photoaddressable polymers 114
4.6 Novel bisazobenzene-based compounds 128
5. List of publications and presentations 140
Danksagung 142