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114th General Meeting of Korean Chemical Society Crystal Transformations of Cu(I) Coordination Polymers with an N/S Donor Ligand: Novel 1D Triple Stranded Ladder Structure, Luminescence Solvatochromism and Thermochromism by Influence of Intermolecular Interactions or Heat

Submission Date :
8 / 28 / 2014 , 14 : 00 : 36
Abstract Number :
Presenting Type:
Poster Presentation
Presenting Area :
Authors :
전영은, 조성화, 이상진, 강기행, 김태호*, 김진은*
경상대학교 화학과, Korea
Assigned Code :
INOR.P-211 Assigend Code Guideline
Presenting Time :
10월 15일 (수요일) 16:00~19:00
Four copper(I) coordination polymers, {[Cu4I4L2].H2O}n (1), {[Cu4I4L2].2CH3CN}n (2), and {[Cu4I4L2]}n (polymorphs 3 and 4) with 2-(2-benzylthio)ethyl)pyrazine (L), have been prepared by self-assembly reaction between CuI and L. Four coordination polymers 1-4 show supramolecular isomerism by solvent molecules. Compounds 1-3 interconnected by stair-step Cu4I4 units are 1D looped chain structures. Remarkably, the crystal structure of CP 4 is 1D triple stranded ladder composed of 1D zigzag chain (CuI)n and stair-step (Cu2I2)n polymer units. The color of CP 1 changes from red at 298K to yellow at 77K and the color of CP 2 changes from orange at 298K to yellow at 77K. In addition, crystal transformation between 1-4 occurred reversibly by removal of solvent molecular or addition of solvents. The results of our investigation including synthesis, structural characterization, thermal and luminescent properties of four new Cu(I) coordination polymers are presented.