Subtle structural engineering of a coordination polymer host for the fluorescence modulation of host-guest donor-acceptor systems

• Published in: Inorganic chemistry frontiers Vol. 1; no. 21; pp. 6229 - 6235
• Main Authors: Nie, Hong-Xiang, Zhang, Bo, Liu, Yi-Ming, Yu, Mei-Hui, Chang, Ze
• Format: Journal Article
• Language: English
• Published: London Royal Society of Chemistry 24.10.2023
• Subjects: Anthracene; Coordination polymers; Emission; Fluorescence; Inorganic chemistry; Modulation; Phenanthrene; Polycyclic aromatic hydrocarbons; Structural engineering
• ISSN: 2052-1553; 2052-1545; 2052-1553
• DOI: 10.1039/d3qi01417g

Host-guest engineering of donor-acceptor (D-A) coordination polymer (CP) materials has been proved to be a promising emission modulation strategy for the fabrication of highly tunable luminophores. Herein, it is shown that the fluorescence modulation of host-guest D-A CPs could be achieved through subtle structural engineering. Two isoreticular CPs, {M 3 (μ 3 -F)(BDC) 3 (TPT)(solvents)} n (M = Cd 2+ for 1 and Zn 2+ for 2 , TPT = 2,4,6-tri(4-pyridyl)-1,3,5-triazine, H 2 BDC = 1,4-benzenedicarboxylic acid), were selected as porous host CPs for investigation. By introducing different polyaromatic hydrocarbon (PAH) guests (anthracene; phenanthrene; pyrene; triphenylene; perylene; and coronene) into the host framework, two series of host-guest D-A CPs ( PAHs@1 and PAHs@2 ) were obtained. Detailed investigation indicates that the subtle structural differences originated from the metal center affected D-A interactions between the PAH and TPT ligand, which result in distinct emission properties of PAHs@1 and PAHs@2 . These results suggest the potential of structural modulation in the property tuning of the D-A CPs. A novel series of host-guest donor-acceptor (D-A) coordination polymer (CP) materials have been fabricated by subtle structural engineering, which presented multifarious emission properties and illustrated the great potential in achieving fluorescence modulation.