4th EucheMs chemistry congress

wednesday, 29-Aug 2012
s843
chem. Listy 106, s587–s1425 (2012)
solid state Chemistry Materials chemistry/New materials
Nanoporous Materials – iii
o - 4 1 0
MetAL orGAniC frAMeworKS for CLeAn
enerGy APPLiCAtionS
G. ShiMizu 1 , r. vAidhyAnAthAn 1 , S. ireMonGer 1 ,
J. tAyLor 1
1 University of Calgary SA 109, Department of Chemistry,
Calgary Alberta, Canada
Until affordable green options are available, fossil fuels will
remain a primary source of energy. Carbon capture represents a
means of mitigating the greenhouse effects of fossil fuel
combustion. This approach also presently carries significant costs
making widespread adoption challenging. Part of this presentation
will focus on the opportunities and challenges to make fossil fuel
energy production greener including the idea of solid sorbents,
such as metal organic frameworks (MOFs), for gases.
MOFs represent tunable molecular scaffolding that can be
adjusted for a breadth of applications. This presentation will
concern our efforts towards tailoring the properties of MOFs
towards energy challenges. [1] The first concerns our efforts to
make MOFs with amine lined pores for CO capture. In contrast
2
to liquid amines which chemisorb CO and have high energy costs
2
for regeneration, the MOF approach gives physisorbed gases and
hence more facile release. Despite the weaker binding mode, we
will show that high selectivities are possible owing to heats of
adsorption over 40 kJ/mol. [2] A key challenge for this field is to
make MOFs that are more hydrolytically stable. Some of our
recent results concern efforts to make more water stable MOFs
using phosphonates and related linkers. [3]
references:
1. a) J. Long, O. Yaghi,Chem. Soc. Rev., 2009, 38, 1213.
b) G. Férey et al., Chem. Soc. Rev. 2011, 40, 550.
c) K. Sumida et al., Chem. Rev., 2012, 112, 724.
d) J. Li et al. Chem. Rev., 2012, 112, 869.
e) S. Keskin et al. ChemSusChem, 2010, 3, 879.
2. a) R. Vaidhyanathan et al. Science, 2010, 330, 650-653.
b) R. Vaidhyanathan et al. Angew. Chem, 2012, 51, 1826.
3. Iremonger, S. S. et al., J. Am. Chem. Soc. 2011, 133, 20048.
Keywords: MOFs; CO capture; Porous solids;
2
Nanoporous Materials – iii
4 th EucheMs chemistry congress
o - 4 1 1
LuMineSCent MoLeCuLeS Confined
in PorouS And LAyered MAteriALS:
enhAnCed PhotoeMiSSion ProPertieS
And oPtoeLeCtroniC APPLiCAtionS
L. MArCheSe 1 , CArniAto f. 1 , CuCinottA f. 1 ,
C. BiSio1 1 Dipartimento di Scienze e Innovazione Tecnologica and
Nano-SiSTeMI Interdisciplinary Centre, Universitá del
Piemonte Orientale A. Avogadro, Viale T. Michel 11, I-15121
Alessandria, Italy
The confinement of luminescent dyes and polymers into the
nanospaces of porous or layered materials may prevent molecules
aggregation and improve their thermal and photochemical
stability along with their photoemission properties. These
requirements are key points for the development of efficient
hybrid optoelectronic devices (HLED). In this field, our research
group recently developed novel hybrid luminescent solids based
on nano-sized MCM-41 and platelet SBA-15 silica containing
inside the pores fluorescein and electroluminescent
polyphenylenevinylene (PPV) co-polymer (super yellow),
respectively. [1] Higher quantum efficiency, mainly related to a
reduction of aggregates of the pure dyes, and improved
photostability were observed in both host-guest systems.
Moreover, hybrid photonic antenna based on SBA-15 solid, where
an encapsulated donor (PPV co-polymer) transfers the
photoexcitation energy directly to an acceptor (cyanine dye)
covalently linked on the external surface was also developed as
promising candidate for use in optoelectronic devices.
Recently, luminescent organo-modified layered materials
were syntesized and tested as light-emitting film in HLED
devices. The structural properties along with their tunable
hydrophilicity/hydrophobicity render these solids suitable to host
and stabilize different luminescent entities. In this respect, two
systemes will be described: i) a synthetic saponite intercalated
with a luminescent polyhedral oligomeric silsesquioxane (POSS)
bearing in the structure a cyanine molecule and ii) a hydrotalcite
decorated on the surface with electroluminescent semiconductor
quantum dot crystals. [2] Both systemes were used as emitting films
in LED devices, because of their enhanced quantum yield
efficiency and improved photostability.
references:
1. F Cucinotta, F. Carniato, C. Bisio, L. Marchese et al.,
Chem. Mater., 2011, 23, 2803; F. Carniato, C. Bisio, L.
Marchese et al., J. Mater. Chem., 2010, 20(26), 5504.
2. J.S. Bendall, L. Marchese et al., Adv. Funct. Mater., 2010,
20, 3298.
AUGUst 26–30, 2012, PrAGUE, cZEcH rEPUbLIc