120th General Meeting of the KCS

Type Symposium
Area [SRC Symposium] Biomimetic Catalysis Based on Porous Platform (BCP2)
Room No. Room 214
Time WED 15:10-:
Code KCS4-5
Subject Practical 2D ensemble channels for crystal structure determination of liquid chemicals via SCSC guest exchange
Authors DAYE CHOI, Ok-Sang Jung*
Department of Chemistry, Pusan National University, Korea
Abstract The single-crystal-to-single-crystal (SCSC) solvate exchange of [Ag2(CF3SO3)2L2)]·2C4H8O·2/3CH3OH·1/3H2O (1·2C4H8O·2/3CH3OH·1/3H2O) and [Ag2L2(C4H8O)2](PF6)2·C4H8O (2·C4H8O) at various temperatures offers a landmark in delicate proof-of-concept experiments on both pore-shape and temperature. 1 and 2 are 2D networks consisting of 54-membered metallacyclic rings in a slightly sliding multi-layered mode with open channels and in a staggered multi-layered mode with closed cages, respectively, forming the single crystals of P- and M-helical enantiomeric multi-layered ensembles. The solvate molecules of 1 in cyclic liquid media are fully exchanged to transform each solvate crystal such as 1·3C4H8O2 from dioxane in a SCSC state. Thus, the crystal structures of various ring compounds such as tetrahydrofuran, dioxane, benzene, cyclohexane, cyclohexene, bromobenzene, cyclohexanol, tetrahydropyran, and… as solvates nestled in the matrix 1 are fully refined and solved. The SCSC solvate exchange of a series of 1 is proportional to temperature. Thus, this stable molecular system 1 is the most efficient reproducible and flexible porous matrix for the crystal structures of various liquid ring compounds in a SCSC state. In contrast, those of 2·C4H8O with closed cages are not exchanged even at 70 oC.
E-mail dayem@hanmail.net