Construction of fluorescence active MOFs with symmetrical and conformationally rigid N-2-aryl-triazole ligands

Jingyang Li; Ying He; Li Wang; Guanghua Li; Yongcun Zou; Yan Yan; Dandan Li; Xinli Shi; Zhiguang Song; Xiaodong Shi

doi:10.1039/d0ra09305j

Construction of fluorescence active MOFs with symmetrical and conformationally rigid N-2-aryl-triazole ligands

RSC Adv. 2020 Nov 18;10(68):41921-41925. doi: 10.1039/d0ra09305j. eCollection 2020 Nov 11.

Authors

Jingyang Li¹, Ying He², Li Wang¹, Guanghua Li¹, Yongcun Zou¹, Yan Yan¹, Dandan Li¹, Xinli Shi¹, Zhiguang Song¹, Xiaodong Shi²

Affiliations

¹ State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun Jilin 13002 China szg@jlu.edu.cn.
² Department of Chemistry, University of South Florida 4202 E. Fowler Avenue Tampa Florida 33620 USA xmshi@usf.edu.

Abstract

1,4-Bis-triazole-substituted arene (NAT) was designed and synthesized for the construction of metal organic frameworks. Unlike the tri-phenyl analogs, which give a twisted conformation between three benzene rings due to the A-1,3 repulsion, the NAT-ligand gave the energetically favored co-planar conformation with the strong fluorescence emission. With this ligand, two new MOFs, NAT-MOF-Cd (2,3,4-c) and NAT-MOF-Cu (4-c), were successfully obtained with the structure confirmed by X-ray. With the six-coordinated Cd(ii) cluster, an interesting metal-ligand coordination and H-bonding hybridized porous polymeric structures were observed. In contrast, a typical Cu(ii) paddle wheel coordination was obtained with NAT and Cu, giving a new MOF structure with moderate stability in aqueous solution from pH 1-11 for 24 hours, which suggests a promising future for applications in fluorescence sensing and photocatalysis.