M.-H. Whangbo
Department of Chemistry, North Carolina State University, Raleigh, North
Carolina 27695-8204, USA
In this talk we will discuss the apparently puzzling structural/electronic properties of some transition-metal perovskite oxides, which include the competition between the high-spin and low-spin states in the ferromagnet YSr
3
Co
4
O
10+ and the antiferromagnet
LaCoO
3
, the oxygen/hydrogen diffusion in the A-site ordered oxygen-deficient perovskite LaBaCo
2
O
5.5+
, and the factors controlling the patterns of distortions from the ideal cubic perovskite structure.

Minyoung Yoon
Department of Nanochemistry, College of Bionano, Gachon University myyoon@gachon.ac.kr
In the light of growing interests on the emergent nanoporous materials including metalorganic frameworks (MOFs) and organic molecular porous materials, especially as materials for storage, separation, catalysis and transport, considerable efforts have been given to get custom designed internal environments of pores or channels. Synthesis of new MOFs has become immensely important because of their potential applications in gas storage and separation. Strong binding of fuel gasses such as hydrogen and methane has become immensely important to increase hydrogen storage capacity at room temperature. A new and simple route to metal binding site by post-synthetic modification has developed. Especially, multiple hydrogen binding sites on single metal ion is studying. We also reported an extraordinary organic molecular porous material based on cucurbit[6]uril, porous CB[6], exhibiting high thermal stability, permanent porosity, remarkable gas sorption/separation properties, and proton conductivity. Finally, a new approach to synthesize porous carbon materials from MOFs will be presented. The surface area of the resulting carbon materials was controllable by changing Zn/C ratio of original MOFs. They can be used as an adsorbent

for gas separation and electrode of supercapacitor. Details of our recent work will be presented.

In Su-il
Energy Systems Engineering, DGIST, Korea
The development of solar powered photo-activated materialspromises to have a major impact in a variety of future applications in environmentally friendly science, such as solar energy conversion (solar fuel and photoelectrocatalysis), self-cleaning, air/water purification and artificial photosyntheiss. For this research various photocatalytic experimental systems have been designed and constructed to conduct gas/solid heterogeneous photocatalytic reactions in the UV-Vis region. Simultaneously visible light activated materials such as anion-doped TiO
2 have been successfully prepared by chemical and/or physical synthetic techniques [1]. Currently a multi-template strategy for synthesizing hollow nanocubes of CuO-TiO
2-x
N x
, a new hybrid material that photocatalytically converts CO
2
into methane under solar irradiation, has been developed [2]. In addition this talk will review researches related to the direct conversion of solar energy to chemical fuels (i.e., hydrogen) utilizing a combination of a visible or infrared light absorber such as Si with non-Pt hydrogen evolution reaction (HER) catalysts such as cubanes made of Mo x
S y
. Prof. Chorkendorff and et al. showed that the bioinspired molecular co-catalysts such as incomplete cubane-like

clusters (Mo
3
S
4
) efficiently catalyze the evolution of hydrogen when coupled to a ptype Si semiconductor that harvests red photons in the solar spectrum. The current densities at the reversible potential match the requirement of a photoelectrochemical hydrogen production system with a solar-to-hydrogen efficiency in excess of 10% [3].
[1] S. –I. In et al., Journal of the American Chemical Society, 2007, 129 (45), 13790-
13791.
[2] S. –I. In et al., Angewandte Chemie International Edition, 2012, 51, 3915-3918.
[3] Ib Chorkendorff et al., Nature Materials, 2011, 10, 434-438.