995-34-6Relevant academic research and scientific papers
Fabrication of highly uniform gel coatings by the conversion of surface-anchored metal-organic frameworks
Tsotsalas, Manuel,Liu, Jinxuan,Tettmann, Beatrix,Grosjean, Sylvain,Shahnas, Artak,Wang, Zhengbang,Azucena, Carlos,Addicoat, Matthew,Heine, Thomas,Lahann, Joerg,Overhage, Joerg,Braese, Stefan,Gliemann, Hartmut,Woell, Christof
, p. 8 - 11 (2014)
We report the fabrication of 3D, highly porous, covalently bound polymer films of homogeneous thickness. These surface-bound gels combine the advantages of metal-organic framework (MOF) materials, namely, the enormous flexibility and the large size of the maximum pore structures and, in particular, the possibility to grow them epitaxially on modified substrates, with those of covalently connected gel materials, namely, the absence of metal ions in the deposited material, a robust framework consisting of covalent bonds, and, most importantly, pronounced stability under biological conditions. The conversion of a SURMOF (surface-mounted MOF) yields a surface-grafted gel. These SURGELs can be loaded with bioactive compounds and applied as bioactive coatings and provide a drug-release platform in in vitro cell culture studies.
Hyperbranched poly(aroxycarbonyltriazole)s: Metal-free click polymerization, light refraction, aggregation-induced emission, explosive detection, and fluorescent patterning
Li, Hongkun,Wu, Haiqiang,Zhao, Engui,Li, Jie,Sun, Jing Zhi,Qin, Anjun,Tang, Ben Zhong
, p. 3907 - 3914 (2013)
The metal-free click polymerization (MFCP) of azide and alkyne has become a powerful tool for the synthesis of functional polytriazoles. Among which, the MFCP of propiolate and azide has been used to prepare functional linear poly(aroxycarbonyltriazole)s (PACTs). Their hyperbranched analogues, however, have been rarely prepared. In this paper, hyperbranched PACTs with satisfactory molecular weights and high regioregularities were synthesized in high yields by the MFCP of tripropiolates (1) and tetraphenylethene (TPE)-containing diazide (2) under the optimized reaction conditions without protection from oxygen and moisture. The resultant polymers are soluble in common organic solvents and thermally stable, with 5% loss of their weights at temperatures higher than 330°C. The polymers exhibit high refractive indices with low chromatic dispersion. Thanks to their contained TPE units, the polymers show the unique feature of aggregation-induced emission, and their aggregates can function as fluorescent sensors for the detection of explosives with the superamplification quenching effect. Furthermore, the polymers can be readily photo-cross-linked, yielding two-dimensional fluorescent patterns with high resolution.
