title: Charge density mismatch synthesis of MEI- and BPH-type zeolites in the TEA(+)-TMA(+)-Li(+)-Sr(2+) mixed-structure-directing agent system.
abstract: Nanocrystalline MEI- and BPH-type zeolites, denoted as PST-11 and PST-12, respectively, have been synthesized using both tetraethylammonium and tetramethylammonium ions, the two simplest alkylammonium species, in the presence of Li(+) and Sr(2+). PST-12 formation is the first example of a combination of forced and multiple cooperative structure-directions in the charge density mismatch synthesis of zeolites.
authors: Center for Ordered Nanoporous Materials Synthesis, Department of Chemical Engineering and School of Environmental Science and Engineering, POSTECH, Pohang 790-784, Korea. sbhong@postech.ac.kr.
authors: Min Bum
authors: MB
authors: Park
authors: Sang Hyun
authors: SH
authors: Ahn
authors: Nak Ho
authors: NH
authors: Ahn
authors: Suk Bong
authors: SB
authors: Hong