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SHAPE-SELECTIVE ISOPROPYLATION OF BIPHENYL OVER DEALUMINATED H-MORDENITES
Sugi, Y,Kim, J.H,Matsuzaki, T,Hanaoka, T,Kubota, Y,Tu, X,Matusmoto, M 전남대학교 촉매연구소 1993 촉매학술발표회 Vol.- No.10
Shape-selective alkylation using zeolitc is a useful way to introduce functional groups symmeetrically to aromatic hydrocarbons. One of important development on shape-selective catalysis achieved recently is the success in isopropylation of polynuclear aromatics, such as biphinyl and naphthalene over H-mordenite[1-5]. However, the mechanism of the catalysis related to solid acid sites and steric requirement in zeolite pores have not been fully understood. In this paper, we examine the isopropylation of biphenyland the ismerization of 4,4'-diisopropylbiphenyl over highly dealuminated H-mordenites, and discuss the mechanism of the catalysis.
Choi, K.Y.,Hong, D.K.,Matsuzaki, S. North-Holland Pub. Co 2011 Physics letters: B Vol.706 No.2
We propose a new dark matter candidate, light decoupled techni-dilaton, which arises from the almost scale-invariant/conformal (extreme walking) technicolor. We investigate its characteristic nature and discuss several cosmological and astrophysical constraints. It turns out that techni-dilatons are extremely weakly interacting and produced dominantly by the non-thermal mechanism to become the main component of dark matter with mass range between around 0.01 eV and 500 eV for extreme walking technicolor scenarios.