1258-71-5Relevant academic research and scientific papers
Redox-responsive photochromism and fluorescence modulation of two 3D metal-organic hybrids derived from a triamine-based polycarboxylate ligand
Zhu, Qi-Long,Sheng, Tian-Lu,Fu, Rui-Biao,Hu, Sheng-Min,Chen, Ling,Shen, Chao-Jun,Ma, Xiao,Wu, Xin-Tao
, p. 3358 - 3362 (2011)
A radical change: Two 3D ZnII complexes with pillared structures have been synthesized from a triamine-based polycarboxylate ligand under hydrothermal conditions. The complexes exhibit reversible radical-based redox photochromism that varies from yellow to bluish-violet and dark blue, respectively, under UV/blue irradiation, and fluorescence with adjustable intensity. The ESR and X-ray photoelectron spectroscopy studies verify photochromic mechanisms based on electron transfer. Copyright
High-efficiency fluorescent probe constructed by triazine polycarboxylic acid for detecting nitro compounds
Zhang, Nan,Li, Bing,Wang, Xuemeng,Liu, Dongqi,Han, Xue,Bai, Fengying,Xing, Yongheng
, (2020)
By means of hydrothermal synthesis, a series of isomorphic lanthanide rare earth complexes [Ln2(TTHA)(H2O)4]·7H2O (Ln = Sm(1), Eu(2), Gd(3), Tb(4) and Dy(5)) were constructed by triazine polycarboxylic acid ligand (H6TTHA). They were characterized by elemental analysis, IR, TG, PXRD, UV–vis, etc. In particular, the structure of complex 1 was analyzed as a representative, and the results showed that it was a porous 3D structure. Fluorescence sensing tests showed that complexes 2 and 4 can be used as novel fluorescent probes for the efficient detection of nitroaromatic compounds.
Thorium-Organic Framework Constructed with a Semirigid Triazine Hexacarboxylic Acid Ligand: Unique Structure with Thorium Oxide Wheel Clusters and Iodine Adsorption Behavior
Bai, Feng-Ying,Sun, Li-Xian,Xing, Yong-Heng,Zhang, Na
, p. 3964 - 3973 (2020)
We successfully prepared and characterized a distinctive thorium-based MOF (metal-organic framework) Th-TTHA with thorium oxide wheel clusters under the conditions of solvothermal synthesis by utilizing thorium nitrate and semirigid triazine hexacarboxylic acid linker H6TTHA (H6TTHA = 1,3,5-triazine-2,4,6-triamine hexaacetic acid). To the best of our knowledge, Th-TTHA is the first thorium-based MOF assembled by semirigid triazine hexapod ligand H6TTHA. It is worth mentioning that Th-TTHA exhibits a novel and distinctive arrangement of structure and topology. Th-TTHA has abundant adsorption sites such as the triazine ring that is rich in nitrogen atoms, N of NH-, and carboxyl oxygen atoms without coordination with a central metal, which drove us to explore its iodine adsorption capacity. The experimental results show that Th-TTHA shows excellent adsorption capacity for iodine, and the adsorption amount in a saturated iodine cyclohexane solution can reach 528 mg/g within 24 h. This work is greatly significant for the development of new structures of thorium-based MOFs and the expansion of its functional characteristics, which is very essential for our in-depth understanding of thorium chemistry and in the management and disposal of radionuclides and application of the nuclear fuel cycle.
Highly Selective Chloromethanes Detection Based on Quartz Crystal Microbalance Gas Sensors with Ba-MOFs
Liu, Yanan,Fan, Yu,Hou, Chaoyi,Du, Wei,Zhang, Dan,Liu, Yu,Xu, Jiaqiang,Bai, Yue-Ling
supporting information, p. 16370 - 16377 (2021/11/13)
Three new metal-organic frameworks (MOFs), {(CH3NH3)3[Ba2(TTHA)(NO3)(H2O)2]}·2H2O (1), {(CH3NH3)4[Ba3(HTTHA)2(H2O)7]}·3H2O (2), and [Ba7(TTHA)2(NO3)2(H2O)10]·2H2O (3) (H6TTHA = 1,3,5-triazine-2,4,6-triamineh-exaacetic acid) have been synthesized and characterized. The sensing properties of 1-3 were explored with regard to volatile organic compounds (VOCs) by the quartz crystal microbalance (QCM) technique. The results indicated that 1 and 2 have a much higher selectivity and response to chloromethanes (CH2Cl2, CHCl3, and CCl4) compared with H2O, CH3OH, CH3CH2OH, CH3CN, (CH3)2CO, C6H6, C6H5CH3, C6H5CH2CH3, and C6H5Cl at room temperature. Furthermore, 1 and 2 sensing film also exhibits excellent reversibility and stability, and the response and recovery times are almost within 10 s. 3 displays a lower response and poor selectivity to the above VOCs. The significant difference may be caused by their different structural characteristics. The Ba2+ ions are all decacoordinated in 1 and 2, while Ba2+ ions have more open metal sites in 3. So, the high selectivity and response of 1 and 2 may be due to the exchange of coordination water molecules with chloromethanes and possible electrostatic effects between (CH3NH3)+ cations and chloromethanes containing more electronegative Cl atoms. DFT calculation results show that the bond energy of Ba-Cl and Ba-O is not much different, so chloromethanes at high concentrations may exchange coordination water to form weak Ba···Cl interactions and show higher response values. 3 has no obvious VOCs selectivity and higher response due to more open sites of Ba2+ ions and smaller pore size. This work develops a fast and effective method to detect chloromethanes, providing a new opportunity for designing QCM gas sensors coated with different MOF materials.
Microwave-assisted SNAr reaction of 2,4,6-trichloro-1,3,5- triazine for the rapid synthesis of C3-symmetrical polycarboxylate ligands
Karuehanon, Weeranuch,Fanfuenha, Watcharee,Rujiwatra, Apinpus,Pattarawarapan, Mookda
experimental part, p. 3486 - 3489 (2012/08/27)
The microwave-assisted SNAr reaction of 2,4,6-trichloro-1,3,5- triazine with various unprotected amino acids was developed for the synthesis of C3-symmetrical polycarboxylate ligands which can be used as structural directing units in
Tri-substituted triazines
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, (2008/06/13)
Tri-substituted s-triazine di and triimino substituted alkyl and aryl mono and dicarboxylic acids and salts thereof useful as complement inhibitors.
