585-29-5Relevant articles and documents
A Covalent Triazine Framework, Functionalized with Ir/N-Heterocyclic Carbene Sites, for the Efficient Hydrogenation of CO2 to Formate
Gunasekar, Gunniya Hariyanandam,Park, Kwangho,Ganesan, Vinothkumar,Lee, Kwangyeol,Kim, Nak-Kyoon,Jung, Kwang-Deog,Yoon, Sungho
, p. 6740 - 6748 (2017)
Functionalizing the recently developed porous materials such as porous organic frameworks and coordination polymer networks with active homogeneous catalytic sites would offer new opportunities in the field of heterogeneous catalysis. In this regard, a novel covalent triazine framework functionalized with an Ir(III)-N-heterocyclic carbene complex was synthesized and characterized to have a coordination environment similar to that of its structurally related molecular Ir complex. Because of the strong σ-donating and poor π-accepting characters of the N-heterocyclic carbene (NHC) ligand, the heterogenized Ir-NHC complex efficiently catalyzes the hydrogenation of CO2 to formate with a turnover frequency of up to 16000 h-1 and a turnover number of up to 24300; these are the highest values reported to date in heterogeneous catalysis for the hydrogenation of CO2 to formate.
Self-assembly of photochromic diarylethene-peptide conjugates stabilized by β-sheet formation at the liquid/graphite interface
Nishitani, Nobuhiko,Hirose, Takashi,Matsuda, Kenji
, p. 5099 - 5102 (2019)
Two-dimensional (2-D) self-assembly of diarylethene (DAE)-peptide conjugates at the octanoic acid/graphite interface was investigated by scanning tunnelling microscopy (STM). The open-ring isomer of a DAE-peptide conjugate formed a stable 2-D molecular assembly with an antiparallel β-sheet structure. Quantitative analysis of surface coverage depending on concentration revealed a stronger stabilization effect of the oligopeptide than that of the alkyl group with a similar side chain length.
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Paragraph 0249; 0308; 0309, (2020/06/15)
The present invention provides a metallocenyl compound of formula (I). Ra, Rb, Rc, Rd, Re, Rf, M, m, n, j, k, Y and Z and * are as described in the specification. The invention also provides a process for the preparation of the complexes, a process for increasing the optical purity of a compound of formula (II) and a process for the asymmetric transfer hydrogenation (ATH) of a metallocenyl compound of formula (V) to a metallocenyl compound of formula (IV).
Hydrogenation of CO2 to Formate using a Simple, Recyclable, and Efficient Heterogeneous Catalyst
Gunasekar, Gunniya Hariyanandam,Jung, Kwang-Deog,Yoon, Sungho
, (2019/03/11)
Today, one of the most imperative targets to realize the conversions of CO2 in industry is the development of practically viable catalytic systems that demonstrate excellent activity, selectivity, and durability. Herein, a simple heterogeneous Ru(III) catalyst is prepared by immobilizing commercially available RuCl3·xH2O onto a bipyridine-Functionalized covalent triazine framework, [bpy-CTF-RuCl3], for the first time. This novel catalyst efficiently hydrogenates CO2 into formate with an unprecedented turnover frequency (38800 h-1) and selectivity. In addition, the catalyst excellently maintains its efficiency over successive runs and produces a maximum final formate concentration of a2.1 M in just 2.5 h with a conversion of 12% in regard to CO2 feed. The apparent advantages of air stability, ease of handling, simplicity, the use of a readily available metal precursor, and the outstanding catalytic performance make [bpy-CTF-RuCl3] one of the possible candidates for realizing the large-Scale production of formic acid/formate by CO2 hydrogenation.
