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A Redox-Active 2D Coordination Polymer: Crystal Dynamics on Guest Removal and Preparation of Silver and Gold Nanoparticles

Submission Date :
3 / 8 / 2006 , 11 : 03 : 06
Abstract Number :
Presenting Type:
Poster Presentation
Presenting Area :
Authors :
문회리, 백명현
서울대학교 화학과,
Assigned Code :
28P94포 Assigend Code Guideline
Presenting Time :
금 <발표Ⅱ>
A 2D square grid coordination polymer, {[Ni(cyclam)]2[BPTC]}n2nH2O (1), has been assembled from [Ni(cyclam)](ClO4)2 and H4BPTC (H4BPTC = 1,1´-biphenyl-2,2´,6,6´-tetracarboxylic acid) in H2O/MeOH/TEA. By heating single crystal 1 at 180 °C under 10-5 Torr for 24 h, desolvated compound {[Ni(cyclam)]2[BPTC]}n (2) was obtained in the single-crystal-to-single-crystal manner. The X-ray crystal structure of 2 reveals extensive dynamic motions of the molecular components in response to guest removal, involving rotation, swing, and bending, which reduces the interlayer distance. The Ag (3.7 ± 0.4 nm, diameter) and Au (2 nm, diameter) nanoparticles were obtained by immersion of 1 in the EtOH solutions of AgNO3 and NaAuCl4·2H2O, respectively, for 5 min at room temperature, as evidenced by HRTEM images, EPR, and XPS spectra.