4th EucheMs chemistry congress

Poster Session 2
s1185
chem. Listy 106, s257–s1425 (2012)
Poster session 2 - Green Chemistry
P - 0 6 4 6
SyntheSiS of SuCCiniC ACid derivAtiveS
under MiCrowAve irrAdiAtion
y. J. KiM 1 , J. h. SonG 2
1 Chungnam National University, Chemistry, Daejeon, Republic
of Korea
2 Sunchon National University, Chemistry, Sunchon, Republic of
Korea
Dioctyl succinates and succinic anhydride were synthesized
from succinic acid in the presence of a cation exchange resin,
Amberlite IR-120. The synthesis of dioctyl succinate from
succinic acid and octanol was perfomed in 18 h reflux condition
with Amberlite IR-120 and the isolated yield of product was over
90 %. For the synthesis of succinic anhydride, succinic acid was
refluxed in isopropenyl acetate for 18 h with Amberlite IR-120 as
a catalyst. The long reaction time was significantly reduced to less
than 10 min under microwave irradiation. We will discuss the
chemical transformation using microwave irradiation method and
the reusability of catalyst.
Keywords: Catalyst Reuseability; Microwave Irradiation;
4 th EucheMs chemistry congress
P - 0 6 4 7
wAter-SoLuBLe tin(iv) PorPhyrinS AS
PhotoSenSitiSerS for ArtifiCiAL
PhotoSyntheSiS
A. M. MAnKe 1 , P. Kurz 1 , K. GeiSeL 2
1 Institut für Anorg. Chemie, Christian-Albrechts-Universität,
Kiel, Germany
2 Institut für Phys. Chem., RWTH Aachen Universität, Aachen,
Germany
Light-driven water-splitting into hydrogen and oxygen is a
concept for sustainable energy generation. This concept is inspired
by basic principles of photosynthesis, the process where solar
energy is converted into chemically stored energy in nature.
In vivo, chlorophyll molecules act as light absorbing molecules
and electron transfer agents. They generate both the high oxidising
potentials for water-oxidation and the strong reducing agents for
NADP + -reduction.
We study the water-soluble tin(IV) porphyrins dichlorido-
-5,10,15,20-tetrakis(p-carboxyphenyl)-porphyrinato-tin(IV)
(SnTPPC) and dichlorido-5,10,15,20-tetrakis(p-sulfophenyl)-
-porphyrinato-tin(IV) (SnTPPS) as possible mimics for
chlorophyll dyes. The compounds show favourable redox
potentials to act as photosensitisers in an artificial system for
light-driven water-splitting. We tested the ability of these synthetic
porphyrins to act as photosensitisers in photocatalytic model
systems and especially detected promising rates for light-induced
H formation in a photocatalytic system developed by Krüger and
2
Fuhrhop. [1] Details on possible mechanisms, the reaction kinetics,
photosensitiser stability and the use of different electron donors
will be presented.
references:
1. W. Krüger, J. H. Fuhrhop, Angew. Chem. Int. Ed. 21, 131
(1982).
Keywords: Bioinorganic chemistry; energy conversion;
homogeneous catalysis; porphyrinoids; water splitting;
AUGUst 26–30, 2012, PrAGUE, cZEcH rEPUbLIc