Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 111-24-0, is researched, SMILESS is BrCCCCCBr, Molecular C5H10Br2Journal, Article, Angewandte Chemie, International Edition called Few-Unit-Cell MFI Zeolite Synthesized using a Simple Di-quaternary Ammonium Structure-Directing Agent, Author is Lu, Peng; Ghosh, Supriya; Dorneles de Mello, Matheus; Kamaluddin, Huda Sharbini; Li, Xinyu; Kumar, Gaurav; Duan, Xuekui; Abeykoon, Milinda; Boscoboinik, J. Anibal; Qi, Liang; Dai, Heng; Luo, Tianyi; Al-Thabaiti, Shaeel; Narasimharao, Katabathini; Khan, Zaheer; Rimer, Jeffrey D.; Bell, Alexis T.; Dauenhauer, Paul; Mkhoyan, K. Andre; Tsapatsis, Michael, the main research direction is MFI zeolite quaternary ammonium structure directing agent synthesis; adsorption; catalysis; di-quaternary structure directing agents; pentasil; ultrasmall crystalline domain.Quality Control of 1,5-Dibromopentane.
Synthesis of a pentasil-type zeolite with ultra-small few-unit-cell crystalline domains, which is called FDP (few-unit-cell crystalline domain pentasil), is reported. FDP is made using bis[1,5-(tributylammonium)]pentamethylene cations as structure directing agent (SDA). This di-quaternary ammonium SDA combines Butylammonium, in place of the one commonly used for MFI synthesis, Propylammonium, and a five-carbon nitrogen-connecting chain, in place of the six-carbon connecting chain SDAs that are known to fit well within the MFI pores. X-ray diffraction anal. and electron microscopy imaging of FDP indicate ca. 10 nm crystalline domains organized in hierarchical micro-/meso-porous aggregates exhibiting mesoscopic order with an aggregate particle size ≤ 5μm. Al and Sn can be incorporated into the FDP zeolite framework to produce active and selective methanol-to-hydrocarbon and glucose isomerization catalysts, resp.
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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis