475482-29-2Relevant academic research and scientific papers
Self-assembly of dendrimers by slippage
Elizarov, Arkadij M.,Chang, Theresa,Chiu, Sheng-Hsien,Stoddart, J. Fraser
, p. 3565 - 3568 (2002)
(graph presented) A dendrimer with rotaxane-like characteristics has been assembled under thermodynamic control from complementary wedge-shaped precursors by slippage in CH2Cl2. The driving force for the self-assembly process is the molecular recognition that exists as a result of [N+-H...O] and [C-H...O] hydrogen bonds between an NH2+ center in one Frechet-type benzyl ether wedge and a dibenzo[24]crown-8 unit that links the other two such wedges.
Two guest complexation modes in a cyclotriveratrylene-based molecular container
Li, Ming-Jhe,Lai, Chien-Chen,Liu, Yi-Hung,Peng, Shie-Ming,Chiu, Sheng-Hsien
, p. 5814 - 5816 (2009)
We report the synthesis of a cyclotriveratrylene-based molecular container and its distinctly different modes of complexation with dimethyldiazapyrenium and 4,4′-biphenylbisdiazonium ions.
Fluorescence emission enhancement of a T-shaped benzimidazole with a mechanically-interlocked ‘suit’
Xu, Houyang,Lin, Meng-Di,Yuan, Jun,Zhou, Baiyang,Mu, Yingxiao,Huo, Yanping,Zhu, Kelong
supporting information, p. 3239 - 3242 (2021/04/06)
A fluorescent T-shaped benzimidazole was successfully designed and interlocked in a bicyclic macrocycle to form a suit[1]ane through supramolecular templated-synthesis. Compared with the bare fluorophore, suit[1]ane requires nearly two times the concentration to initialize the aggregation-caused quenching effect in solution. Furthermore, an 8-fold higher solid-state fluorescence quantum yield (21.7%) is also achieved. By taking advantage of mechanical bonding and molecular packing, such fluorescence emission enhancement through formation of a suitane opens the way to new complex fluorescent materials.
Novel Isophthalohydrazide-cDB24C8 cryptand derivative for the selective recognition of fluoride ion: An experimental and DFT study
Bora, Sankar Jyoti,Dutta, Rakesh,Kalita, Dhruba Jyoti,Chetia, Bolin
, p. 225 - 231 (2018/06/26)
A highly selective and sensitive novel Isophthalohydrazide-cDB24C8 cryptand derivative was developed for fluoride recognition at a very low concentration of 2.31 × 10?10 M. The binding was established by UV–Vis, fluorescence and 1H NMR titration. The receptor formed very strong H-bonded complex with fluoride, furnished a sharp new UV–Vis absorption peak at 280 nm which was also supported by the DFT-study. The fluorescence emission spectra showed large quenching up to 79.13% upon addition of fluoride.
Poly(vinylbenzo macrocyclic polyethers). Synthesis and cation binding properties of 12-crown-4-derivatives
Buchanan, G. W.,Denike, J. K.
, p. 702 - 705 (2007/10/02)
The synthesis of 4'-vinylbenzo-12-crown-4 ether is reported.Polymerization to relatively low molecular weight polymers can be accomplished with a free radical initiator.A copolymer with styrene can be prepared and the Li+, Na+, and K+ binding properties of these polymers are compared to those of their monomeric analogs using salt distribution equilibria in water - methylene chloride.For all cations the homopolymer is found to extract the salts from the aqueous phase most effectively.The copolymer is slightly less effective than the homopolymer but effective than either of the monomers by a factor of approximately 7, indication that cooperative binding is likely.Na+ is the most efficiently extracted cation, followed by K+ and Li+.
