Browsing by Author "Liu, Yunling"
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Item Highly effective and fast removal of anionic carcinogenic dyes: Via an In3-cluster-based cationic metal-organic framework with nitrogen-rich ligand(Royal Society of Chemistry, 2019) Liu, Xinyao; Liu, Bing; Eubank, Jarrod F.; Liu, YunlingIn this work, highly effective and rapid removal of anionic carcinogenic organic dye molecules is achieved through the use of a novel cationic metal–organic framework (MOF). The MOF is constructed using a nitrogen-rich triangular organic ligand, 4,4′,4′′-s-triazine-1,3,5-triyltri-p-aminobenzoate (H3TATAB), and trinuclear 6-connected In3-cluster secondary building units (SBUs), [In3O(TATAB)2(H2O)3](NO3)·(DMA)15 (In-TATAB), which gives a structure exhibiting a new topology. As the formula indicates, In-TATAB is inherently cationic due to the [In3O(COO−)6]+ units, which thus favors interaction with anionic guests. Several organic dye molecules of varying charge and size, such as acid chrome blue K, acid red 26, congo red, direct black 38 and, orange II, were used to test the sequestration potential of the MOF material. In addition to electrostatic attraction, it is shown that hydrogen-bonding originating from the highly functional bridging ligand and terminal H2O ligands enhance the interactions between the framework and guest dye molecules, suggesting its potential use for the removal of anionic organic pollutants.Item Self-assembly of two robust 3D supramolecular organic frameworks from a geometrically non-planar molecule for high gas selectivity performance(The Royal Society of Chemistry, 2019-05-29) Zhou, Yue; Kan, Liang; Eubank, Jarrod F.; Li, Guanghua; Zhang, Lirong; Liu, YunlingThe synthesis of highly porous frameworks has received continuous research interest, but achieving the ability to target stable and selective materials remains challenging. Herein, by utilizing a 'direction-oriented' strategy and modulating reaction conditions, two novel 3D porous supramolecular organic framework (SOF) materials ( JLU-SOF2 and JLU-SOF3 , as isomers) are assembled from a non-planar building block (TMBTI = 2,4,6-trimethyl benzene-1,3,5-triyl-isophthalic acid) and they display permanent porosity, high thermal stability, and good recyclability. It is worth mentioning that the CO 2 uptake values of JLU-SOF2 and JLU-SOF3 rank among the highest values for SOF-based materials under ambient conditions. Furthermore, these two materials exhibit preferential adsorption of CO 2 over N 2 and CH 4 , and can effectively separate the mixtures of light hydrocarbons. These studies indicate the possible application of JLU-SOF2 and JLU-SOF3 in trapping greenhouse gases and upgrading natural gas. In addition, this synthetic strategy introduces an effective method for developing remarkable 3D SOFs among other framework materials. Two 3D SOFs were synthesized based on a 'direction-oriented' strategy. The unique and permanent porosity structures exhibit remarkable ability to separate CO 2 from N 2 and light hydrocarbons.Item Unique Fluorescence Turn-On and Turn-Off–On Responses to Acids by a Carbazole-Based Metal–Organic Framework and Theoretical Studies(Journal of the American Chemical Society, 2022-09-21) Qiao, Junyi; Liu, Xinyao; Zhang, Lirong; Eubank, Jarrod F.; Liu, Xin; Liu, Yunling