10103-20-5Relevant articles and documents
Synthesis, crystal structure and photophysical properties of 1,4-bis(1,3-diazaazulen-2-yl)benzene: A new π building block.
Sun, Peili,Zhang, Zongyao,Luo, Hongxia,Zhang, Pu,Qin, Yujun,Guo, Zhi-Xin
, p. 171 - 176 (2018)
A dimerized 1,3-diazaazulene derivative, namely 1,4-bis(1,3-diazaazulen-2-yl)benzene [or 2,2′-(1,4-phenylene)bis(1,3-diazaazulene)], C22H14N4, (I), has been synthesized successfully through the condensation reaction betwee
Covalent Triazine Frameworks via a Low-Temperature Polycondensation Approach
Wang, Kewei,Yang, Li-Ming,Wang, Xi,Guo, Liping,Cheng, Guang,Zhang, Chun,Jin, Shangbin,Tan, Bien,Cooper, Andrew
, p. 14149 - 14153 (2017)
Covalent triazine frameworks (CTFs) are normally synthesized by ionothermal methods. The harsh synthetic conditions and associated limited structural diversity do not benefit for further development and practical large-scale synthesis of CTFs. Herein we report a new strategy to construct CTFs (CTF-HUSTs) via a polycondensation approach, which allows the synthesis of CTFs under mild conditions from a wide array of building blocks. Interestingly, these CTFs display a layered structure. The CTFs synthesized were also readily scaled up to gram quantities. The CTFs are potential candidates for separations, photocatalysis and for energy storage applications. In particular, CTF-HUSTs are found to be promising photocatalysts for sacrificial photocatalytic hydrogen evolution with a maximum rate of 2647 μmol h?1 g?1 under visible light. We also applied a pyrolyzed form of CTF-HUST-4 as an anode material in a sodium-ion battery achieving an excellent discharge capacity of 467 mAh g?1.
Tuning the electronic coupling in Mo2-Mo2 systems by variation of the coordinating atoms of the bridging ligands
Shu, Yao,Lei, Hao,Tan, Ying Ning,Meng, Miao,Zhang, Xiao Chun,Liu, Chun Y.
, p. 14756 - 14765 (2014)
Three novel [Mo2]-bridge-[Mo2] complexes were synthesized by a convergent assembling reaction of the dimetal precursor Mo2(DAniF)3(O2CCH3) (DAniF = N,N′-di(p-anisyl)formamidinate) with the bridging ligands terephthalamidine, terephthalamide and dithioterephthalamide. The structures of these compounds, [Mo2(DAniF)3]2[μ-1,4-{C(E)NH}2-C6H4] (E = NH (1), O (2) or S (3)), were determined, either by X-ray crystallography or 1H NMR spectroscopy, to be the analogues of the terephthalate bridged dimolybdenum dimer. These compounds are structurally and electronically closely related by having the same structural skeleton and similar bonding parameters, which allowed us to analyze the differences between N, O and S atoms on the bridging ligand in promoting electronic interaction between the two [Mo2] units. In the electronic spectra, the metal to ligand charge transfer absorption bands, attributed to the HOMO (dδ) → LUMO (pπ) transition, was red shifted as the variable atoms change from N to O to S. The mixed-valence species 1+, 2+ and 3+, generated by one-electron oxidation of the neutral precursors and measured in situ, exhibited characteristic intervalence absorption bands, for which the energy and half-height bandwidth decreased from 1+ to 3+. Therefore, in comparison to O atoms, S atoms are capable of enhancing the electronic coupling between the two [Mo2] units, and the incorporation of N atoms to the bridging ligands slightly diminished the metal-metal interaction. The molecular structures and spectroscopic properties of these compounds were simulated by theoretical calculations at DFT level on the simplified models, which gave results consistent with the experimental observations. This journal is
A thiadiazole-based covalent triazine framework nanosheet for highly selective and sensitive primary aromatic amine detection among various amines
Chang, Yanjiao,Huang, Hongliang,Li, Yang,Peng, Ben,Tang, Yuanzhe,Zhong, Chongli
, p. 16542 - 16550 (2020)
Primary aromatic amines (PAAs), as a class of persistent and highly toxic organic pollutants, have been posing a great threat to human health and the environment. Therefore, the design and preparation of a highly sensitive and selective luminescent probe
Hydrogen bond-Driven Self–Assembly between Amidinium Cations and Carboxylate Anions: A Combined Molecular Dynamics, NMR Spectroscopy, and Single Crystal X-ray Diffraction Study
Thomas, Michael,Anglim Lagones, Thomas,Judd, Martyna,Morshedi, Mahbod,O'Mara, Megan L.,White, Nicholas G.
, p. 1587 - 1597 (2017)
A combination of molecular dynamics (MD), NMR spectroscopy, and single crystal X-ray diffraction (SCXRD) techniques was used to probe the self–assembly of para- and meta-bis(amidinium) compounds with para-, meta-, and ortho-dicarboxylates. Good concordanc
Novel disubstituted phenylene-linked bis-imidazole derivatives: Facile synthesis and optical properties
Song, Guang-Liang,Zhu, Hong-Jun,Chen, Lei,Liu, Shan,Luo, Zhong-Hua
experimental part, p. 2397 - 2405 (2011/02/18)
Six novel disubstituted phenylene-linked bis-imidazole derivatives, 3a-3f, were prepared by a one-pot, microwave-assisted method under solvent-free conditions, in yields ranging from 61.6 to 85.6%. The new compounds were characterized by 1H- and 13C-NMR, UV/VIS, and fluorescence spectroscopy, and mass spectrometry, as well as by elemental analyses. The influence of substituents and solvents on the optical properties of 3a-3f was investigated. It was found that there is little influence on absorption and excitation spectra in contrast to emission spectra. Compounds 3a-3f exhibit strong fluorescence in solution, their fluorescence quantum yields ranging from 0.27 to 0.96.
Enzyme-controlled molecular recognition: Selective targeting of trypsin with a substrate-inhibitor supramolecular complex
Rudra, Sonali,Eliseev, Alexey V.
, p. 11543 - 11547 (2007/10/03)
We have synthesized and studied the host compound (1) that forms a noncovalent complex (K = 480 ± 30 M-1) with 1,4-diamidinobenzene (2) at pD 8.0 in D2O. Guest 2 has been shown to inhibit the proteases specific for cationic side chains (K(i) values for thrombin, plasmin, and trypsin being 1.0 ± 0.4, 0.6 ±0.1, and 0.88 ± 0.07 mM, respectively). Host 1 and the 1- 2 complex are shown to undergo the trypsin-catalyzed cleavage that results in the increased concentration of the free form of 2 and, therefore, induces the enzyme inhibition. Plasmin and thrombin are shown to cleave 1 at a significantly lower rate than trypsin. Thus, the complex of 1 with 2 represents the first example of a selective enzyme-sensitive supramolecular system capable of enzyme targeting through a 'trojan horse'-type mechanism in which a bioactive compound acts on the same molecule that provides its release from a delivery system.
